Loading...
HomeMy WebLinkAbout08-14-2025 - RNT Rebid Addendum - 1 - signedADDENDUM NO. 1 TO THE CONTRACT DOCUMENTS CITY OF RENTON RENTON MUNICIPAL AIRPORT TAXIWAY A REHABILITATION AND ASSOCIATED IMPROVEMENTS PROJECT A.I.P. #3-53-0055-032-2023 Renton, Washington TO: All Plan Holders DATE: August 15, 2025 PROJECT NO: FAA A.I.P. #3-53-0055-032-2023 CWEC #35022.008.02 The following changes, additions, and/or deletions are hereby made a part of the Contract Documents for the above-mentioned project, as fully and completely as if the same were fully set forth therein. CONTRACT MANUAL 1. Refer to Volume V, Section I, Technical Specifications, L-109-1.1. Added the following: “There is a 5-day window shown for schedule D in the construction phasing plans for the contractor to accomplish the necessary power outage, power cutover, demolition and installations as well as testing and commissioning of the new constant current regulators in the new vault building. The contractor will create a detailed schedule for this work and communicate it with the airport and the RPR prior to shutting down any existing power to the airfield”. 2. Refer to Volume V, Section I, Technical Specifications, L-109-5.2. Added the following: “Contractor can submit a L-829 CCR in lieu of providing a L-828 CCR paired with a separate L- 827 as an approved equivalent. CCR will be dry type, air cooled, three or five precision output current levels (6.6 amp CCRs are required)”. Affected Contract Manual sections, as listed below, are wholly replaced by the attached amended versions. - Technical Specification L-109 DRAWINGS 1. None INFORMATIONAL ITEMS 1. A copy of the final Geotechnical Report is attached as an informational item. 2. A copy of the Final Renton Municipal Airport PFAS Sampling Investigation is attached as an informational item. QUESTIONS & ANSWERS Q1: “If the bid alternate for lighting vault replacement is taken, are there provisions to allow for the outage that will be necessary to complete the demo, install, testing , re-commissioning?” A1: Refer to Rebid Addendum 1 revising Volume V, Section I, Technical Specifications, L-109-1.1. Q2: “109-5.3 notes “…Each regulator shall be furnished w/ a control module capable of providing L827 monitoring and control and capable of fully integrating with, or replicating the existing and modified functions of the existing [ALCMS.”] I just wanted to confirm that any hardware/software/interface & controls/components that are proprietary/sole source to the control system will need to be procured outside of this AIP Funded project per AIP Guidelines, AIP Handbook 5100-38D Change 1, 3-36 Limited Noncompetitive Proposal Situations (ALCMS Modifications…). It was not clear from the documents if there are any proprietary component requirements, so I just wanted to verify.” A2: Refer to Rebid Addendum 1 revising Volume V, Section I, Technical Specifications, L-109-5.2. BIDDERS SHALL ACKNOWLEDGE RECEIPT OF THIS ADDENDUM IN THE SPACE PROVIDED IN THE PROPOSAL. BIDS SUBMITTED WITHOUT ACKNOWLEDGEMENT OF THIS ADDENDUM IN THE PROPOSAL WILL BE CONSIDERED IRREGULAR. Greg Reince, P.E. Senior Project Manager Century West Engineering 541.322.8962 GEOTECHNICAL REPORT RENTON MUNICIPAL AIRPORT TAXIWAY A RECONSTRUCTION/REHABILITATION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON HWA Project No. 2023-027-21 May 31, 2024 Prepared for Century West Engineering RMA – Taxiway A Rehabilitation/Reconstruction i HWA GEOSCIENCES INC. TABLE OF CONTENTS 1.0 INTRODUCTION ..........................................................................................................1 1.1 GENERAL .......................................................................................................1 1.2 PROJECT UNDERSTANDING ............................................................................1 2.0 FIELD INVESTIGATION AND LABORATORY TESTING ..................................................2 2.1 DRILLED BORINGS .........................................................................................2 2.2 PAVEMENT CORING .......................................................................................3 2.3 FALLING WEIGHT DEFLECTOMETER TESTING ...............................................7 2.4 TEST PIT EXPLORATIONS ...............................................................................13 2.5 LABORATORY TESTING .................................................................................14 3.0 SITE CONDITIONS ......................................................................................................15 3.1 SITE DESCRIPTION .........................................................................................15 3.2 GENERAL GEOLOGY ......................................................................................16 3.3 SUBSURFACE CONDITIONS ............................................................................17 3.4 GROUNDWATER CONDITIONS ........................................................................18 4.0 CONCLUSIONS AND RECOMMENDATIONS ..................................................................19 4.1 GENERAL .......................................................................................................19 4.2 FROST CONDITIONS .......................................................................................22 4.3 SUBGRADE STABILIZATION ...........................................................................24 4.4 DRAINAGE .....................................................................................................25 4.5 WET WEATHER EARTHWORK ........................................................................25 4.6 TEMPORARY EXCAVATIONS ..........................................................................25 5.0 CONDITIONS AND LIMITATIONS .................................................................................26 LIST OF FIGURES (FOLLOWING TEXT) Figure 1 Site & Vicinity Map Figures 2A – 2D Site and Exploration Plans Figure 3 FWD Test Results – Taxiway A Maximum Deflections Figure 4 FWD Test Results – Taxiway A Subgrade Resilient Moduli Figures 5 – 10 FWD Test Results – Connector Taxiway Maximum Deflections Figures 11 – 18 FWD Test Results – Connector Taxiway Subgrade Resilient Moduli Figure 19 FWD Test Results – Comparison of Mr Calculation Method Figure 20 Historic Lake Washington Shoreline APPENDICES Appendix A: Field Exploration Figure A-1 Legend of Terms and Symbols Used on Exploration Logs Figures A-2 – A-26 Logs of Borings B-1 through B-25 RMA – Taxiway A Rehabilitation/Reconstruction ii HWA GEOSCIENCES INC. Figures A-27 – A-49 Logs of Pavement Cores Core-1 through Core-23 Figures A-50 – A72 Logs of Test Pits TP-1 through TP-22, and PIT-1 Appendix B: Laboratory Test Results Figures B-1 – B-4 Summary of Material Properties Figures B-5 – B-28 Particle Size Analysis of Soils Figure B-29 Liquid Limit, Plastic Limit & Plasticity Index of Soils Appendix C: Laboratory Test Results Figures C-1 – C-18 Aggregate Grainsize Analysis & Fracture Face Count Appendix D: Laboratory Test Results Figures D-1 – D-6 Moisture Density Relationship of Laboratory Compacted Soils Figures D-7 – D-12 California Bearing Ratio of Laboratory Compacted Soils Appendix E: Pavement Condition Photos Figures E-1 – E-23 Pavement Condition Photos at Pavement Core Locations Figures E-24 – E-48 Pavement Condition Photos at Borehole Locations Appendix F: Historical Photographs Figures F-1 – F-5 Historical Photographs at Renton Municipal Airport GEOTECHNICAL REPORT TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 1.0 INTRODUCTION 1.1 GENERAL This report summarizes the results of a geotechnical investigation undertaken by HWA GeoSciences Inc. (HWA) at Renton Municipal Airport, Washington, in support of the design of the Taxiway A Rehabilitation/Reconstruction & Associated Improvements project. Our scope of work included: • Logging the drilling of 25 geotechnical borings to a depth of about 11.5 feet each. • Performing pavement coring at 23 locations along with shallow excavations through each core hole using hand digging equipment. • Performing Falling Weight Deflectometer testing along the Taxiway A and connectors. • Logging the excavation of 22 test pits and one attempted small-scale Pilot Infiltration Test (PIT). • Performing laboratory testing consisting of natural moisture content testing, grain size analyses, fracture face count on crushed aggregate, Atterberg Limits, California Bearing Ratio (CBR) of Lab Compacted Soils and moisture density relationship of soils (Proctor). • Performing engineering analyses pertaining to the proposed improvements and development of this report. The general project location is shown on the Site & Vicinity Map, Figure 1. The locations of our drilled boring, pavement core, and test pit explorations are shown on the Site and Exploration Plans, Figures 2A through 2D. 1.2 PROJECT UNDERSTANDING We understand that Renton Municipal Airport (RMA) plans to reconstruct and/or rehabilitate the pavement along Taxiway A and connector areas; Taxiways A1 through A7, Apron Service Road, and the Seaplane Ramp. RMA also plans to widen and pave taxiway shoulders along the connecter taxiways and portions of Taxiway A. Upgraded lighting, removal of Fire Waterline May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 2 HWA GEOSCIENCES INC. running north-south along Taxiway A, replacement of Fire Waterline running under Taxiway A, and drainage improvements to the infield are also included in this project. 2.0 FIELD INVESTIGATION AND LABORATORY TESTING 2.1 DRILLED BORINGS HWA logged the drilling of 25 geotechnical borings along Taxiway A, associated taxiway connectors, and the Seaplane Ramp between the dates of September 11 – 15, 2023, to assess pavement layer thicknesses and subsurface soil and groundwater conditions. The borings were drilled by Holt Services, of Edgewood, Washington, under subcontract to HWA, using a Terrasonic TSi 150 track mounted sonic drill rig. Sonic drilling provides a continuous sample by advancing a 4.75-inch core barrel into the ground by simultaneously rotating and vibrating the drill stem and cutting head. Each sample is extruded from the core barrel by air pressure into a tubular plastic bag. The plastic bag is cut open then the soils are logged, photographed, and grab samples may be taken before disposal of the cuttings in a steel drum. Small bag samples collected during drilling are shown on the borehole logs in Appendix A. The locations of the drilled borings are shown on Figures 2A through 2D. Standard Penetration Test (SPT) sampling was performed at depths of 5 and 10 feet below ground surface in each of the borings. The SPT resistance (“N-value”) of the soil was logged during each test. Standard Penetration Testing (SPT) was performed using a 2-inch outside diameter split-spoon sampler driven by a 140-pound automatic hammer. During the tests, samples are obtained by driving the sampler 18 inches into the soil with the hammer free-falling 30 inches. The number of blows required for each 6-inches of penetration was recorded by a geologist or engineer during the test. If a total of 50 blows was recorded within a single 6-inch interval, the test was terminated, and the blow count was recorded as 50 blows for the number of inches of penetration. This resistance, or N-value, provides an indication of relative density of granular soils and relative consistency of cohesive soils. A geologist and a geotechnical engineer from HWA logged the explorations and recorded pertinent information, including sample depths, stratigraphy, soil descriptions, and groundwater occurrence. Soil samples obtained from the explorations were classified in the field and representative portions were placed in plastic bags. These soil samples were then taken to our Bothell, Washington, laboratory for further examination and testing. Soils were classified in general accordance with the American Society for Testing and Materials (ASTM) classification system. The summary boring logs are presented in Figures A-2 through A-26, Appendix A. The stratigraphic contacts shown on the exploration logs represent the approximate boundaries between soil types, actual transitions may be more gradual. The soil and May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 3 HWA GEOSCIENCES INC. groundwater conditions depicted are only for the specific date and location reported and, therefore, are not necessarily representative of other locations and times. 2.2 PAVEMENT CORING Pavement coring was performed on June 19, 26, and 27, 2023, at 23 locations throughout Taxiway A, connector taxiways, the Apron Service Road, and the Seaplane Ramp area. Pavement core locations are shown in Figures 2A through 2D. Pavement coring was performed using a 6-inch diameter, trailer hitch mounted, electric core drill to evaluate Hot Mix Asphalt (HMA) pavement thickness, HMA lift thickness and depth of cracking and Portland Cement Concrete (PCC) thickness. Shallow excavations to depths of about 1.5 to 2 feet below pavement surface were completed below each pavement core, using hand digging equipment, to assess crushed aggregate base thickness and shallow subgrade support conditions. Two geologists from HWA completed the pavement coring and shallow excavations. Samples of the crushed aggregate base and subgrade soils were collected for laboratory testing. Pavement core holes were backfilled with material that was excavated from the hole and compacted in lifts. Pavement patching at the surface was completed by compacting water activated Aquaphalt 6.0 permanent pavement repair material. The thickness of the pavement patch material matched or exceeded the thickness of the existing HMA layer. Table 1 summarizes the pavement structure encountered at the locations of drilled borings and pavement cores. Photographs showing the pavement condition at each pavement core and boring location are presented in Appendix E. Table 1. Summary of Pavement Structure Exploration Designation Location HMA Thickness (in.) Crushed Aggregate Base Thickness (in.) PCC Thickness (in.) Subgrade Notes Core-1 Apron Service Road 3.25 4.75 5.75 Medium dense, sandy gravel. Core-2 TWY A 7.5 3.5 9.0 Medium dense, sandy gravel. Core-3 TWY A 7.0 7.0 5.75 2.25 inches HMA on top of buried PCC. Dense, sandy gravel below PCC. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 4 HWA GEOSCIENCES INC. Exploration Designation Location HMA Thickness (in.) Crushed Aggregate Base Thickness (in.) PCC Thickness (in.) Subgrade Notes Core-4 Apron Service Road 11.5 - 9.0 Medium dense, sandy gravel. Core-5 Apron Service Road 3.5 4.5 >3 Terminated in PCC. Core-6 TWY A6 4.5 2.5 >1 5 inches HMA above PCC. Terminated in PCC. Core-7 TWY A 13.25 7.75 - Medium dense, sandy gravel. Core-8 TWY A 7.75 9.25 - Medium dense, sandy gravel. Core-9 TWY A 3.0 5.5 6.0 2.5 inches HMA above PCC. Dense, sandy gravel below PCC. Core-10 TWY A4 7.5 10.5 - Dense, sandy gravel. Core-11 TWY A 6.0 0.5 - 1.5 inches HMA below crushed base. Terminated in additional crushed base. Core-12 TWY A 6.75 6.25 - Dense, sandy gravel. Core-13 TWY A 6.0 1.5 - 6 inches buried HMA. Dense sandy, gravel below buried HMA. Core-14 TWY A 7.0 12.5 - Buried HMA below crushed base. Core-15 Seaplane Ramp 1.0 7.0 - Medium dense, silty sand and medium stiff clay. Core-16 Apron Service Road 3.25 4.25 6.0 Dense, sandy gravel. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 5 HWA GEOSCIENCES INC. Exploration Designation Location HMA Thickness (in.) Crushed Aggregate Base Thickness (in.) PCC Thickness (in.) Subgrade Notes Core-17 Apron Service Road 3.0 - 5.0 Medium dense, sandy gravel. Core-18 Apron Service Road 3.0 18.0 - Buried HMA. Core-19 Apron Service Road 3.25 >20.75 - Terminated in crushed base. Core-20 TWY A 4.0 14.0 - 3 inches buried HMA. Additional crushed base below buried HMA. Core-21 TWY A 3.25 5.75 >1 3 inches buried HMA below crushed base. Terminated in PCC below buried HMA. Core-22 Apron Service Road 4.0 4.0 >1 Terminated in PCC. Core-23 Apron Service Road 3.75 8.25 - Very dense, sandy gravel. B-1 TWY A 5.5 11.5 5.0 Dense, gravel with sand. B-2 Apron Service Road 2.0 6.0 4.0 Dense, silty, sandy gravel. B-3 TWY A 6.5 7.0 - 2 inches buried HMA below crushed base. Dense, silty gravel below HMA. B-4 TWY A 4.5 - 8.5 Dense, gravel and silty sand B-5 TWY A 5.0 3.0 7.0 Dense, gravel. B-6 TWY A 6.0 6.0 5.0 Dense, gravel with silt and sand. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 6 HWA GEOSCIENCES INC. Exploration Designation Location HMA Thickness (in.) Crushed Aggregate Base Thickness (in.) PCC Thickness (in.) Subgrade Notes B-7 TWY A 5.0 5.0 5.0 Dense, gravel with sand. B-8 TWY A5 3.5 26.5 - Medium stiff, silt. B-9 TWY A 9.5 5.5 - Dense, gravel with silt and sand. B-10 TWY A 4.0 4.0 3.5 Buried HMA and crushed base above PCC. Dense, gravel with silt and sand below. B-11 TWY A 7.0 19.0 5.0 Dense, gravel with silt and sand. B-12 TWY A3 9.0 3.0 - Medium dense, sand with silt and gravel. B-13 TWY A 3.0 13.0 5.0 Dense, gravel with silt and sand. B-14 TWY A 6.0 14.0 3.0 Dense, gravel with sand. B-15 Seaplane Ramp 4.0 5.0 - Medium dense, silty sand. B-16 Apron Service Road 6.0 1.0 3.5 Dense, gravel with sand. B-17 Apron Service Road 3.0 5.0 4.5 Dense, gravel with silt and sand. B-18 Apron Service Road 4.5 15.5 6.0 Buried HMA and crushed base above PCC. Dense, gravel with silt and sand below PCC. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 7 HWA GEOSCIENCES INC. Exploration Designation Location HMA Thickness (in.) Crushed Aggregate Base Thickness (in.) PCC Thickness (in.) Subgrade Notes B-19 TWY A 4.0 24.0 5.0 Dense, gravel with silt and sand. B-20 Apron Service Road 3.5 14.5 - Dense, gravel with sand. B-21 Apron Service Road 4.0 5.0 - Dense, gravel with sand. B-22 Apron Service Road 5.5 4.5 - Dense, gravel with sand. B-23 Apron Service Road 3.0 - - Dense, silty gravel with sand. B-24 Apron Service Road 7.0 13.0 - Medium dense, silty gravel with sand. B-25 Apron Service Road 6.0 - - Dense, gravel with sand. 2.3 FALLING WEIGHT DEFLECTOMETER TESTING Falling Weight Deflectometer (FWD) testing was conducted on June 6, 2023, within the project limits along Taxiway A, connector Taxiways A1 through A7, and a portion of the Seaplane Ramp. FWD Station 0+00 for Taxiway A was arbitrarily set where Taxiway A meets the grass at the south end of the airport. For connector taxiways, FWD Station 0+00 was arbitrarily set where the taxiway pavement intersects Runway 16/34 pavement. Testing along Taxiway A was performed at 100-foot spacings roughly 4 feet west of the centerline to avoid testing on a longitudinal construction joint, and approximately 15 feet east and west of the centerline. Connector taxiways were tested at approximately 50-foot spacings, at offsets of about 6 feet on either side of the centerline. Figures 2A and 2D show the approximate Stationing used for FWD testing. Figure 3 presents the maximum deflections (immediately under the applied load) normalized to a load of 25,000 pounds for each test line along Taxiway A. Figures 4 through 10 present plots of maximum deflections, normalized to a load of 25,000 pounds, for the connector taxiways. Figure 11 presents the subgrade resilient modulus for each test location along Taxiway A. Figures 12 through 18 present the subgrade resilient moduli values for connector taxiways. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 8 HWA GEOSCIENCES INC. The FWD testing was undertaken using a Dynatest Model 8012 Fast Falling Weight Deflectometer. This FWD allows the pavement to be tested under a wide range of loading conditions (6,500 to 27,000 pounds) to simulate a variety of traffic loads. For this project, pulse loads of approximately 12,000, 17,000 and 25,000 pounds were applied to the pavement surface at each test location. The corresponding pavement surface deflections were measured with velocity transducers located directly under the loaded area, and at 8,12, 18, 24, 36, 48, 60, and 72 inches from the center of the loaded area. Tables 2 and 3 summarize the FWD deflection data for the areas tested. Table 2. Maximum Deflection Normalized to 25,000-pound Load - Taxiway A Test Lane Number of Tests Included Average Maximum Deflection, mils Standard Deviation, mils Highest Deflection in Segment, mils Lowest Deflection in Segment, mils TWY A, 15 ft West of Centerline 55 29.6 6.5 46.3 7.8 TWY A, 4 ft West of Centerline 53 26.4 3.9 34.7 17.6 TWY A, 15 ft East of Centerline 54 33.6 12.8 64.1 16.4 Table 3. Maximum Deflection Normalized to 25,000-pound Load – Taxiway Connectors A1 through A7 Test Lane Number of Tests Included Average Maximum Deflection, mils Standard Deviation, mils Highest Deflection in Segment, mils Lowest Deflection in Segment, mils TWY A1, 6 ft North of Centerline 5 24.8 6.4 31.5 16.3 TWY A1, 6 ft South of Centerline 5 25.7 6.9 32.7 14.6 TWY A2, 6 ft North of Centerline 4 23.3 7.4 29.1 12.5 May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 9 HWA GEOSCIENCES INC. Test Lane Number of Tests Included Average Maximum Deflection, mils Standard Deviation, mils Highest Deflection in Segment, mils Lowest Deflection in Segment, mils TWY A2, 6 ft South of Centerline 4 20.9 4.8 24.4 13.8 TWY A3, 6 ft North of Centerline 6 31.2 14.3 15.6 6.6 TWY A3, 6 ft South of Centerline 6 32.6 14.5 49.5 7.25 TWY A4, 6 ft North of Centerline 5 39.4 18.8 57.0 14.6 TWY A4, 6 ft South of Centerline 5 35.7 18.6 60.7 11.3 TWY A5, 6 ft North of Centerline 6 66.0 27.4 96.8 17.5 TWY A5, 6 ft South of Centerline 8 56.8 33.9 95.5 5.4 TWY A6, 6 ft North of Centerline 5 21.3 4.9 25.7 15.8 TWY A6, 6 ft South of Centerline 5 19.7 3.1 24.3 16.2 TWY A7, 6 ft North of Centerline 4 24.6 6.1 32.7 18.3 TWY A7, 6 ft South of Centerline 4 27.8 4.6 33.5 22.8 Due to the high variability of pavement types and thicknesses across the project site, backcalculation of the subgrade resilient modulus was performed at locations where FWD testing was conducted adjacent to an exploration where pavement layer thicknesses were known. These layer thicknesses were input into the computer program BAKFAA and the subgrade resilient modulus values were backcalculated. Because the backcalculated values are highly sensitive to pavement layer thickness inputs, we could not use the BAKFAA program for most of the data given the high variability in pavement layer types and thicknesses. The backcalculations were performed at 14 locations along Taxiway A, 2 locations along taxiway connectors, and 2 locations located at the Seaplane Ramp. Experience has shown that surface modulus values, determined using the computer program ELMOD6, at 18, 24, 36, or 48 inches from the applied load often closely match backcalculated resilient modulus values. Selecting the correct distance from the load for this correlation May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 10 HWA GEOSCIENCES INC. depends on thickness of the pavement section and subgrade response characteristics. For the FWD test results obtained, surface modulus values at 48 inches from the applied load closely matched backcalculated modulus values. Table 4 presents backcalculated subgrade resilient modulus values for each of the exploration locations where pavement layer thickness and type were available from pavement coring and drilled borings. These modulus values are presented next to surface modulus values at 48 inches from the load for comparison. Table 4. Subgrade Resilient Modulus Versus Surface Modulus at 48 inches From Load – Taxiway A Exploration Designation FWD Station FWD Test Line Subgrade Resilient Modulus, ksi Surface Modulus at 48 inches From Load, ksi B-1 3+02 TWY A 15' E 30.5 29.7 Core-3 8+74 TWY A 15' W 39.1 35.0 B-3 9+81 TWY A 15' E 27.3 29.5 B-4 12+00 TWY A 15' E 20.7 19.1 B-5 15+40 TWY A 15' E 19.1 18.2 B-6 16+99 TWY A 4' W 17.0 16.9 Core-7 18+67 TWY A 15' E 15.2 16.1 Core-8 22+07 TWY A 15' E 13.0 12.9 Core-9 23+07 TWY A 15' W 14.9 14.9 B-9 25+18 TWY A 15' E 19.7 18.6 B-11 30+04 TWY A 15' W 32.6 34.3 Core-12 31+79 TWY A 15' E 22.5 22.1 Core-13 36+68 TWY A 15' E 14.6 14.1 Core-14 43+19 TWY A 15' E 31.5 34.0 May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 11 HWA GEOSCIENCES INC. Figure 19 provides a graphic representation of the data in Table 4. As shown in Figure 19, the correlation between the two methods of subgrade modulus calculation is very close. For this reason, statistics for modulus values presented in Tables 5 through 7 represent surface modulus values at 48 inches from the applied load. This method of analysis does not introduce additional error into the backcalculation by inputting incorrect pavement layer thickness information, while also providing representative subgrade modulus values for each test location. Table 5. Surface Modulus at 48 inches From Load – Taxiway A Test Lane Number of Tests Included Average Modulus, ksi Standard Deviation, ksi Highest Value, ksi Lowest Value, ksi TWY A, 15 ft West of Centerline 55 29.1 15.4 75.7 13.3 TWY A, 4 ft West of Centerline 53 27.3 14.4 86.8 13.4 TWY A, 15 ft East of Centerline 54 25.1 14.7 80.6 13.1 Table 6. Surface Modulus at 48-inches From Load – Taxiway Connectors A-1 through A-7 Test Lane Number of Tests Included Average Modulus, ksi Standard Deviation, ksi Highest Value, ksi Lowest Value, ksi TWY A1, 6 ft North of Centerline 5 30.1 2.1 33.0 27.7 TWY A1, 6 ft South of Centerline 5 29.9 4.1 34.7 25.3 TWY A2, 6 ft North of Centerline 4 35.8 6.1 44.5 31.2 TWY A2, 6 ft South of Centerline 4 36.4 6.4 44.9 29.6 May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 12 HWA GEOSCIENCES INC. Test Lane Number of Tests Included Average Modulus, ksi Standard Deviation, ksi Highest Value, ksi Lowest Value, ksi TWY A3, 6 ft North of Centerline 5 16.7 4.8 24.3 12.9 TWY A3, 6 ft South of Centerline 5 16.2 3.7 22.6 13.6 TWY A4, 6 ft North of Centerline 4 13.3 4.8 20.4 10.7 TWY A4, 6 ft South of Centerline 4 13.7 3.8 19.4 11.5 TWY A5, 6 ft North of Centerline 5 9.7 1.2 11.5 8.3 TWY A5, 6 ft South of Centerline 6 9.4 1.6 12.3 7.9 TWY A6, 6 ft North of Centerline 5 21.5 3.4 25.1 17.9 TWY A6, 6 ft South of Centerline 5 22.2 2.5 24.5 18.9 TWY A7, 6 ft North of Centerline 4 30.2 6.3 35.6 21.5 TWY A7, 6 ft South of Centerline 4 26.6 11.9 42.7 14.0 Taxiways A3 through A5 have an existing utility trench patch running roughly perpendicular to the taxiway that resulted in high modulus values between 30 and 40 ksi. FWD tests that were completed on the utility trench patch were omitted from the statistics in Table 6 as they skewed the average modulus values upward and did not represent subgrade conditions nearby. As shown in Table 6, Taxiways A3 through A5 had the lowest modulus values of all the taxiways tested with average values between 9.4 and 16.7 ksi. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 13 HWA GEOSCIENCES INC. FWD testing performed at the Seaplane ramp resulted in backcalculated subgrade resilient modulus values of between 12.6 ksi, at the location of Core-15, and 15.3 ksi at the location of B-15, using pavement thickness information obtained from these explorations. After comparing backcalculated subgrade resilient modulus from BAKFAA and surface modulus values from Elmod, it was determined that surface modulus at 12 inches from the load was most representative of subgrade conditions within the Seaplane ramp. Table 7 provides a statistical summary of moduli values from each segment of test line performed at the Seaplane Ramp. Table 7. Surface Modulus at 12 inches From Load – Seaplane Ramp Test Lane Number of Tests Included Average Subgrade Resilient Modulus, ksi Standard Deviation, ksi Highest Value, ksi Lowest Value, ksi TWY A, 15 ft West of Centerline 3 13.5 4.5 16.4 8.3 TWY A, 4 ft West of Centerline 2 11.9 4.9 15.4 8.4 TWY A, 15 ft East of Centerline 2 14.0 3.7 16.6 11.4 2.4 TEST PIT EXPLORATIONS Test pit explorations were completed on September 11 and 12, 2023, at locations selected by Century West Engineering along the infield, between Runway 34/16 and Taxiway A. Northwest Excavating, of Mill Creek, Washington was subcontracted by HWA to excavate the test pits using a Bobcat E50 mini excavator. A geologist from HWA logged the test pits, recording soil stratigraphy, texture, soil classification, groundwater occurrence, and collected samples for laboratory testing. Test pits were backfilled with excavated spoils and tamped with the excavator bucket at the completion of each excavation. Test pit locations are presented in Figures 2A through 2D. Photographic logs of the test pits are presented in Figures A-50 through A-72, Appendix A. One small scale Pilot Infiltration Test (PIT) was attempted to determine surface water infiltration feasibility on September 14, 2023, at a location selected by Century West Engineering. The base of the PIT was 51 inches below the ground surface. The pre-soak period of the PIT began at 9:47 AM, and water was added to the excavation until a head of 1.38 feet of water was reached. The water level in the PIT remained at 1.38 feet for 3 hours without introduction of additional May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 14 HWA GEOSCIENCES INC. water. The PIT was terminated at 1:00 PM due to the static water level remaining unchanged in the test pit. During excavation, after the water had been removed from the test pit, saturated soils were observed only 1 inch below the base of the PIT excavation. Medium dense, silty sand receptor soils extended to a depth of 57 inches below ground surface, overlying loose, wet, poorly graded sand. Groundwater was observed at 57 inches below ground surface. After the first phase of test pit explorations and laboratory testing were completed, it was determined that additional test pits would be beneficial to characterize soil conditions adjacent to Taxiway A and to provide samples for modified Proctor and California Bearing Ration (CBR) testing. On December 11, 2023, HWA and NW Excavating returned to complete six additional test pits, designated TP-17 through TP-22, at the locations shown on Figures 2A through 2D. Bulk samples of near surface soils were collected from each test pit for sieve analysis, CBR and modified Proctor testing. The test pits were excavated using a Bobcat E-60 excavator. A geologist from HWA logged each of the test pits and collected samples for laboratory testing. The results of CBR and modified Proctor testing are presented in Figures D-1 through D-12, Appendix D, and summarized below in Sections 2.5 and 4.1 of this report. 2.5 LABORATORY TESTING Representative soil samples obtained from the drilled borings, pavement cores, and test pits were taken to the HWA laboratory for examination and testing. Laboratory tests were conducted on selected soil samples to characterize engineering properties of the soils. Laboratory tests, as described below, included moisture and visual description, grain size distribution, Atterberg Limits, aggregate fracture face count, CBR testing and modified Proctor testing. The results of the laboratory testing are presented in Appendix B, Appendix C, and Appendix D. Moisture Content of Soil: The moisture content (percent by dry mass) of selected soil samples was determined in general accordance with ASTM D 2216. The results are shown at the sampled intervals on the appropriate exploration logs in Appendix A and on the Summary of Material Properties reports, Appendix B, Figures B-1 through B-4. Particle Size Analysis of Soils: The particle size distribution of selected soil samples from the explorations were determined in general accordance with ASTM D6913/D7928. The results are summarized in the attached Particle-Size Analysis of Soils reports, Figures B-5 through B-28, Appendix B, which also provide information regarding the classification of the samples and the moisture content at the time of testing. Liquid Limit, Plastic Limit, and Plasticity Index of Soils (Atterberg Limits): Three samples were tested using method ASTM D4318, multi-point method. The results are reported on the attached Liquid Limit, Plastic Limit, and Plasticity Index of Soils report, Figure B-29 along with the classification of the samples and the moisture content at the time of testing. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 15 HWA GEOSCIENCES INC. Sieve Analysis of Aggregate: Samples of the Crushed Aggregate Base, described as Crushed Base in the logs, were obtained in 17 of the 23 pavement cores, including 2 samples that were obtained in Core-16, for a total of 18 samples. Particle size distribution of each sample was determined by sieving, in general accordance with ASTM C136. The grain size distribution plots are presented in the Particle Size Distribution Reports, Figures C-1 through C-18, Appendix C, and are plotted against the grain size specifications for Item P-209, Crushed Aggregate Base. As indicated on the plots, only 3 of the 18 samples tested met the gradation requirements for Item P-209, while others were out of specification on one to three sieves. Percent Fractured Aggregate: The percentage by weight of gravel-sized particles with at least two fractured faces was determined for the Crushed Aggregate Base samples obtained beneath the HMA. The weight of all fractured gravel-sized particles was divided by the total weight of all gravel-sized particles in the sample. The results are reported on the Particle Size Distribution Reports, Figures C-1 through C-18, Appendix C. As indicated, the test results indicated values of 85% to 99% fractured faces. Laboratory Compaction Characteristics of Soil (Proctor Test): Bulk soil samples from test pits TP-17 through TP-22, representing fill soils nearest to Taxiway A, were tested using ASTM D 1557-12 (modified Proctor). The tests were performed on the portion of the sample passing the ¾-inch sieve, as required by the test procedure. Results of testing are summarized in the attached Laboratory Compaction Test Reports, Figures D-1 through D-6, Appendix D. CBR (California Bearing Ratio) of Laboratory Compacted Soils: The samples discussed above for Proctor testing were tested in general accordance with method ASTM D 1883. Test results for the bulk samples obtained from test pits TP-17 through TP-22, using the ASTM D 1557-12 compaction standard, are summarized in the CBR of Laboratory Compacted Soils reports, Figures D-7 through D-12, Appendix D. 3.0 SITE CONDITIONS 3.1 SITE DESCRIPTION Renton Municipal Airport is located in King County, Washington within the northwestern portion of the City of Renton. The airport has a single runway (Runway16/34) accompanied by parallel Taxiway A to the west and Taxiway B to the east. The runway and associated taxiways are approximately 5,400 feet long. Currently, Taxiway A is approximately 75 feet wide with additional pavement for the Apron Service Road, extending about 50 feet west where it connects with airport aprons. Seven connector taxiways, Taxiways A1 through A7, approximately 40 feet wide, connect Taxiway A to Runway 16/34. The ground surface in the vicinity of this project is predominantly flat and situated between approximately 20 to 30 feet above mean sea level, sloping gently downward north toward Lake Washington. Prior to development, the project area May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 16 HWA GEOSCIENCES INC. existed as the southern extent of Lake Washington and as a flood plain for the Cedar River and Black River. Figure 20, Historic Lake Washington Shoreline, shows the historic lake levels, wetlands, and forested uplands. 3.2 GENERAL GEOLOGY The project site is located within the Puget Lowland. The Puget Lowland has repeatedly been occupied by a portion of the continental glaciers that developed during the ice ages of the Quaternary period. During at least four periods, portions of the ice sheet advanced south from British Columbia into the lowlands of Western Washington. The southern extent of these glacial advances was near Olympia, Washington. Each major advance included numerous local advances and retreats, and each advance and retreat resulted in its own sequence of erosion and deposition of glacial lacustrine, outwash, till, and drift deposits. Between and following these glacial advances, sediments from the Olympic and Cascade Mountains accumulated in the Puget Lowland. As the most recent glacier retreated, it uncovered a sculpted landscape of elongated, north-south trending hills and valleys between the Cascade and Olympic Mountain ranges, composed of a complex sequence of glacial and interglacial deposits. Geologic information for the project area was obtained from the Washington State Department of Natural Resources Geologic Information Portal. According to this map, the project site soil is mapped as artificial fill and modified land. Historically, Lake Washington drained to the south through the Black River. Before the year 1916, Lake Washington extended as far south as the current Taxiway A5 location at Renton Municipal Airport. From there, Lake Washington flowed into the mouth of the Black River and met the Cedar River at the southern end of Taxiway A. In the year 1916, a canal had been completed between Lake Washington and Portage Bay (Lake Union) resulting in a lowering of Lake Washington water levels by about 9 feet to match that of Lake Union. Both lake levels would become controlled by the Hiram M. Chittenden Locks, also known as the Ballard Locks. The Cedar River was rerouted to flow into Lake Washington during the same period of land modification, to prevent flooding in the City of Renton. This activity severed Lake Washington’s outflow to the Black River, as well as the Cedar River’s flow into the Black River. As the Black River dried, fill soils were placed in the historic river channel, nearby wetlands, and the local flood plain to create usable land for development. Several historic photos in the project vicinity are presented in Appendix F. Given the historic Lake Washington water levels and nearby rivers in the vicinity of the project area, much of the fill soils at the project site are underlain by soft or loose alluvial silt, clay, sand, and gravel along with wetland deposits consisting of organic silt and peat. Alluvium is mapped east of the project site, adjacent to modified land and fill soils, in the Renton Landing area. Vashon glacial till, glaciofluvial deposits consisting of kame terrace deposits, and undifferentiated glacial deposits are mapped along the hillside to the west of Renton Municipal Airport and may underlie alluvial deposits at Renton Municipal Airport. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 17 HWA GEOSCIENCES INC. 3.3 SUBSURFACE CONDITIONS Buried HMA and/or PCC pavement layers were encountered in 14 of the 25 borings and in 13 of the 23 pavement cores, extending to depths of up to 35 inches below ground surface at the location of boring B-18. At locations where buried pavement was observed, a crushed base layer had typically been placed on top of PCC and then paved with HMA. The buried PCC had been overlayed by HMA before burial with crushed base at several locations, likely as part of development over the years. Fill soils encountered below buried pavement consists of gravel or sand with varying amounts of silt, and sandy silt placed during construction of the Boeing Plant and Renton Municipal Airport between the years 1941 and 1945. The average fill thickness below Taxiway A was approximately 5 feet. The thickest fill deposits were encountered in borings B-16 and B-14, with respective depths of 9.5 and 11.5+ feet. Borings B-5, B-8, B-9, B-12, B-22, and B-23 encountered the thinnest fill thickness, varying between 2 and 3 feet in depth. Fill soils overlie alluvial deposits from Lake Washington, the Black River, and the Cedar River. Soil type and depth of fill varies across the site and is likely thickest where the Black River channel was infilled, and in the northern portion of the airport. The following sections describe each soil type encountered below buried pavement. Gravel Borrow Fill: Loose to dense, brown, dark grayish brown, and dark gray, poorly graded to well graded gravel with varying amounts of silt, sand, and cobbles, moist. Typically found below the pavement sections. This soil type is generally dense; however, medium dense gravel borrow fill was encountered in several of the borings. Loose gravel borrow fill was encountered in boring B-18. Fill: Loose to dense, brown, gray, dark gray, silty, poorly graded gravel with varying amounts of cobbles. Loose to dense, brown, dark brown, gray, and dark gray, silty sand with varying amounts of gravel. Medium stiff to stiff, brown, yellow brown, dark gray, sandy silt with varying amounts of gravel. Alluvium: Fine Grained – Very soft to medium stiff, dark olive gray, dark grayish brown, silt with varying amounts of sand, organics, and gravel. Organic silt was observed in borings B-8 and B-21, between the respective depths of 4 to 5 feet and 6 to 9.5 feet. Very soft, dark olive brown, lean clay with sand and woody debris was observed in boring B-18 between the depths of 8.75 to 11.5 feet. Granular – Loose to medium dense, dark grayish brown to dark gray, fine to medium, silty sand with varying amounts of silt, organic matter, and gravel. Loose to medium dense, brown and gray, fine to medium sand with varying amounts of silt and gravel. Loose to medium dense, brown and gray to very dark gray, poorly graded gravel with varying amounts of silt, sand, and May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 18 HWA GEOSCIENCES INC. cobbles. Coarser grained alluvium was primarily observed near the south end of Taxiway A in borings B-1 and B-2 and test pits TP-1 and TP-2, near the historic confluence of the Cedar and Black Rivers. 3.4 GROUNDWATER CONDITIONS Groundwater was observed in 23 of the 25 borings and 20 of the 23 test pits. Where encountered, the depth to groundwater varied from about 4 feet to 9.5 feet in the borings and about 4.8 feet to 8.6 feet in the test pits (excluding test pits TP-20 through TP-22 discussed below). Average groundwater elevation is about 18.4 feet across the site. The deepest groundwater encountered was observed in test pit TP-14 at elevation 14.1 feet, while the shallowest groundwater encountered was observed in boring B-1 at elevation 21.7 feet. In general, the groundwater elevation decreases to the north, toward Lake Washington, beneath Taxiway A and the infield, suggesting recharge from the southern part of the airport, possibly from the buried Black River channel and the Cedar River groundwater table. Groundwater occurrence was typically observed within permeable alluvial soils. We anticipate that the ground surface of alluvial soils was most likely undulating prior to being filled over during construction of the airport, creating an undulating aquitard of fill soil that could be controlling groundwater elevation beneath the airport. It should be noted that all of the borings and test pits TP-1 through TP-16, along with PIT-1, were performed in September 2023 during the dry season. Test pits TP-17 through TP-22 were excavated in December 2023 during the wet, rainy season. Test pits TP-20 through TP-22 all encountered very shallow, slow groundwater seepage in the granular fill perched above less permeable fill soils; however, the test pits, with the exception of TP-18, did not extend to the depth of the static groundwater table observed in other explorations. At the location of test pit TP-18, groundwater was encountered in the native, alluvial soils at a depth of 4.6 feet (elevation 19.4 feet). Lake Observations by Citizens & Satellites (LOCSS) began monitoring Lake Washington water levels at a gauge station that was installed by the City of Kirkland in 2018. The gauge station was surveyed by the City of Kirkland and the 0.00 mark was set to 16.47 feet above mean sea level. According to this data, Lake Washington water elevation varies between about 16.5 and 18.7 feet annually with peak water levels occurring between April and June. Lake Washington water levels likely affect groundwater conditions at Renton Municipal Airport during peak water levels in spring, given that the groundwater elevations observed in the northern half of the airport are similar to Lake Washington water levels. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 19 HWA GEOSCIENCES INC. 4.0 CONCLUSIONS AND RECOMMENDATIONS 4.1 GENERAL The results of our explorations and laboratory testing indicate a considerable variation in pavement layer types, thicknesses and subgrade support conditions across the site. Many of the explorations encountered older layers of PCC and HMA buried below fill, typically crushed aggregate base course. Depths to the older pavement layers and thicknesses of these layers varied considerably, as shown on the exploration logs in Appendix A. Only four explorations (B-4, C-4, C-5 and C-17) encountered PCC immediately below the HMA. Based on the results of the borings, there generally appears to be about 5 feet of pavement and granular fill across the site overlying alluvium. For new pavement design, we recommend that the upper 12 inches of subgrade soils below the new pavement section be compacted to at least 95 percent of the maximum dry density, as determined by ASTM D1556 (modified Proctor). Only 6 of the 25 borings encountered less than 4 feet thickness of pavement and granular fill overlying alluvium, as indicated in Table 8 below. Table 8 also provides the depth to groundwater at the time of exploration, which varied between 4 to 6 feet at these locations. In these areas, over-excavation of soft/loose soils, and/or subgrade stabilization, may be required to construct the new pavement section. At the locations of borings B-22 and B-23, located in front of the control tower, the pavement surface exhibits high severity alligator cracking, surface depressions and relatively recent patching, suggesting ongoing problems in this area. These two borings also had the thinnest depths of pavement and granular fill encountered. Both borings encountered very soft alluvial silt at a depth of 2 feet. Subgrade stabilization recommendations are presented in Section 4.3 of this report. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 20 HWA GEOSCIENCES INC. Table 8. Explorations with Thinner Deposits of Granular Fill Boring Designation Thickness of Pavement & Granular Fill Overlying Subgrade, feet Depth to Groundwater, feet Subgrade Soil Type B-5 3 4 Very soft silt and very loose sand B-8 2.5 5 Medium stiff silt and soft organic silt B-9 3 5 Soft silt and very loose sand B-12 2 6 Very loose silty sand B-22 2 5 Very soft silt B-23 2 4.5 Very soft silt As indicated by the FWD test results, the average subgrade resilient modulus values below the areas tested are typically above 20 ksi, indicating good subgrade support. Only 4 of the areas tested had average values less than 20 ksi: Taxiway A3, Taxiway A4, Taxiway A5 and Seaplane Ramp. These values are presented in Section 2.3 of this report. As described previously, we performed CBR testing using the modified Proctor compaction standard on 6 samples obtained from test pits excavated in the infield, as described in Section 2.4 of this report. It should be noted that laboratory CBR testing is performed on material passing the ¾-inch sieve, meaning that coarse gravel and cobbles present within soils at the site have no influence on the test results. Results of CBR testing on samples obtained from test pits TP-17 through TP-22, are summarized in Table 9 below. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 21 HWA GEOSCIENCES INC. Table 9. CBR Test Results – Modified Proctor Sample Designation Soil Classification Soil Frost Group Moisture Content (%) MDD (pcf) (ASTM D1557) OMC % (ASTM D1557) Laboratory CBR % Comp CBR TP-17, S-1 GW FG-1 5.9 135.8 6.8 90.9 7.4 95.0 38.5 100.0 126.9 TP-18, S-1 SM FG-3 12.2 124.6 9.3 90.3 2.0 95.8 8.9 100.2 12.1 TP-19, S-1 SM FG-2 17.9 116.9 11.2 89.9 3.9 94.8 10.7 99.2 26.9 TP-20, S-1 ML FG-4 25.1 110.0 15.3 89.8 4.3 95.6 10.6 100.3 17.4 TP-21, S-1 ML FG-4 39.0 91.4 21.8 89.1 4.2 93.8 8.0 99.7 35.7 TP-22, S-1 SM FG-4 21.2 106.1 17.3 89.7 5.1 94.9 11.5 99.5 28.5 Table 9 Explanation: Maximum Dry Density (MDD), Optimum Moisture Content (OMC), Percent compaction (% Comp). As indicated in Table 9, at 95% modified Proctor compaction values, the silty sand (SM) soil had CBR values between 8.9 and 11.5. The silt (ML) soils had CBR values of 8.0 and 10.6 at the same compaction level, while the well-graded gravel (GW) sample had a CBR value of 38.5. With additional compaction effort near 100% of modified Proctor, two of the silty sand fill soils (TP-19 and TP-22) showed a dramatic increase in strength with CBR values 26.9 and 28.5. The samples of silt fill soils also showed a significant increase in strength near 100% of modified Proctor, with CBR values of 17.4 and 35.7. Additionally, testing showed that well graded gravel at the site becomes very strong at 95% of modified Proctor with a CBR of 38.5. Excluding the gravel (GW) sample from TP-17, the average CBR value, at approximately 95% compaction, for the samples tested is approximately 10. This roughly correlates to a resilient modulus value of 15,000 psi; which is considerably less than the results obtained from FWD testing along Taxiway A; however, the CBR test samples are soaked for 96 hours prior to testing and the FWD testing was performed during dry summer conditions. For new pavement design, we recommend using a subgrade resilient modulus value of 15,000 psi. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 22 HWA GEOSCIENCES INC. As indicated previously and shown in Appendix C, only 3 of the 18 samples of the existing crushed aggregate base below the HMA met specification requirements for Item P-209, Crushed Aggregate Base Course, as specified in AC 150/5370-10H Standard Specification for Construction of Airports. Additionally, the granular fill encountered below buried pavement layers was highly variable and unlikely to meet specification for P-208 Aggregate Base Course. Therefore, we anticipate all structural fill will need to be imported and meet the specifications for the materials designated. During discussions with the design team, we were made aware of a waterline that will be decommissioned as part of this project, which runs across Taxiway A and then along the length of the taxiway. To avoid complications with exposing soft or loose subgrade soils if the waterline were to be excavated and removed, we recommend that the waterline be abandoned in place by grouting the inside of the pipe. 4.2 FROST CONDITIONS A frost depth penetration analysis was performed as part of the pavement design process. The soils are classified per AC 150/5320-6G Airport Pavement Design and Evaluation based on grain size analyses. Table 10 provides frost group information for 15 samples collected during test pit explorations. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 23 HWA GEOSCIENCES INC. Table 10. Frost Group Determination Exploration, Sample Sample Depth (ft) USCS Classification Percent Finer than 0.02 mm by Weight Frost Group TP-1, S-1 1.4 – 2.0 SM 11 FG-2 TP-3, S-1 1.5 – 2.0 ML 39 FG-4 TP-4, S-1 1.8 – 2.1 SM 26 FG-4 TP-6, S-1 1.4 – 2.0 SM 20 FG-3 TP-8, S-1 1.5 – 2.0 ML 48 FG-4 TP-10, S-1 0.7 – 1.0 GP 2 FG-1 TP-12, S-1 1.0 – 1.5 SM 10.5 FG-2 TP-14, S-1 1.5 – 1.8 GP-GM 5 FG-1 TP-16, S-1 0.7 – 1.2 SM 21 FG-3 TP-17, S-1 1.3 – 2.0 GW 2 FG-1 TP-18, S-1 1.0 – 1.7 SM 16 FG-3 TP-19, S-1 1.5 – 2.0 SM 13 FG-2 TP-20, S-1 2.0 – 2.6 ML 26 FG-4 TP-21, S-1 2.0 – 2.5 ML 46 FG-4 TP-22, S-1 2.3 – 2.5 SM 29 FG-4 Contour maps of maximum frost penetration depth for this area indicate a depth of 20 inches for coarse-grained soils and a depth of 12 inches for fine-grained soils (Pavement Interactive website). May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 24 HWA GEOSCIENCES INC. 4.3 SUBGRADE STABILIZATION Soft or loose, native alluvial soils with high fines content were encountered below a thin section of pavement and granular fill at the locations of the explorations presented in Table 8 in Section 4.1 of this report. Depth to groundwater at these locations varied from about 4 to 6 feet below pavement surface and could potentially cause problems during subgrade compaction and construction of the new pavement section. If encountered during construction, we recommend that soft or loose subgrade soils be excavated about 1 foot below the design pavement section and compacted using a smooth drum roller. We recommend that vibratory compaction not be used for compaction of the subgrade at the locations as this could result in pumping. A large/heavy, smooth drum compactor should be used to thoroughly compact the exposed subgrade as densely as possible . Following compaction, we recommend a separator geotextile and geogrid be placed over the subgrade for stabilization. We recommend Mirafi HP570, or equivalent, for separator geotextile and Tensar InterAx NX650, or equivalent, for geogrid. The separator fabric should be placed over the compacted subgrade and the geogrid placed over the separator fabric, prior to placing and compacting the crushed aggregate base (P-209) above. Alternatively, quarry spalls could be used for stabilization. For this method, we recommend a depth of excavation of 18 inches be made below the design pavement section. A large/heavy, smooth drum compactor should be used to thoroughly compact the exposed subgrade as densely as possible . Following compaction, we recommend a separator geotextile be placed over the subgrade, followed by placement of a depth of 12 inches of 2-inch to 4-inch quarry spalls. The spalls should be thoroughly compacted and another layer of separator fabric should be placed over the spalls followed by a thickness of 6 inches of crushed aggregate base (P-209). Following stabilization, the crushed aggregate base for the new pavement structure should be placed and compacted to at least 95 percent of maximum dry density, as determined using ASTM D1557 (modified Proctor). We anticipate vibratory compaction will be required to achieve this level of compaction. This may result in pumping of the base course, in which case vibration should be discontinued and the base course left undisturbed until pore pressures dissipate. Density testing should be performed during compaction and after pore pressure dissipation to evaluate the level of compaction. This may need to be repeated to achieve the specified minimum compaction. Once the base course is compacted to the specified level, and pore pressures dissipate so that no pumping is evident, the asphalt layers can be placed and compacted. Oscillating rollers could be used to minimize potential to induce further pumping. Trenching for stormwater improvements included in the project may encounter soft or loose subgrade conditions near the groundwater table. Subgrade stabilization for the bottom of the trench, prior to placing pipe zone bedding, should include excavating the trench to 12 inches below the designed depth, placing a separator geotextile, backfilling with 2 to 4-inch quarry spalls tamped in place by the excavator bucket or hoe-pac, followed by placement of another layer of separator geotextile, prior to placing pipe zone bedding. May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 25 HWA GEOSCIENCES INC. 4.4 DRAINAGE It is essential for the satisfactory performance of the pavement that good drainage is provided to prevent water ponding on or alongside, or accumulating beneath, the pavement. Water ponding can cause saturation of the pavement and subgrade layers and lead to premature failure. The base layers and subgrade surface should be graded to prevent water being trapped within the layer. The surface of the pavement should be sloped to convey water away from the pavement to appropriate drainage facilities. 4.5 WET WEATHER EARTHWORK The silty sand, sandy silt and other fine-grained soils throughout the project are moderately to highly moisture sensitive and will be unworkable and pump when wet. The granular fill soils, typically encountered in the upper 5 feet in the drilled borings and pavement cores, are less susceptible to moisture; however, we recommend that earthwork and paving operations occur in periods of dry summer weather. If earthwork is to be performed, or fill is to be placed in wet weather or under wet conditions when soil moisture content is difficult to control, the following recommendations should apply: • Earthwork should be accomplished in small sections to minimize exposure to wet weather. Excavation or the removal of unsuitable soils should be followed promptly by the placement and compaction of a suitable thickness of clean structural fill. The size and type of construction equipment used may have to be limited to prevent soil disturbance. • The ground surface within the construction area should be sloped and sealed with a smooth drum vibratory roller to promote rapid runoff of precipitation, to prevent surface water from flowing into excavations, and to prevent ponding of water. • No soil should be left uncompacted, so it can absorb water. Soils that become too wet for compaction should be removed and replaced with clean granular materials. • Excavation and placement of fill should be observed on a full-time basis by a person experienced in wet weather earthwork to verify that all unsuitable materials are removed, and suitable compaction and site drainage is achieved. 4.6 TEMPORARY EXCAVATIONS Any excavations deeper than 4 feet should be sloped or shored in accordance with current State of Washington Labor and Industries Safety and Health guidelines. Per these guidelines, all existing fill soils on site are classified as Type C Soil. Temporary unsupported excavations within Type C Soil should be sloped no steeper than 1½H:1V (horizontal: vertical). Flatter side May 31, 2024 HWA Project No. 2023-027-21 RMA – Taxiway A Rehabilitation/Reconstruction 26 HWA GEOSCIENCES INC. slopes could be required for excavations below the water table or where groundwater seepage is present. The contractor should monitor the stability of the temporary excavations and adjust the construction schedule and slope inclination accordingly. The contractor should be responsible for control of ground and surface water and should employ sloping, slope protection, ditching, sumps, dewatering, and other measures, as necessary, to prevent sloughing of soils and heave of the bottom of the excavation. 5.0 CONDITIONS AND LIMITATIONS We have prepared this report for Century West Engineering for use in the design of this project. This report should be provided in its entirety to prospective contractors for bidding and estimating purposes; however, the conclusions and interpretations presented herein should not be construed as a warranty of the subsurface conditions. Experience shows that soil and ground water conditions can vary significantly over small distances. Inconsistent conditions may occur between explorations that may not be detected by a geotechnical study of this nature. If, during future site operations, subsurface conditions are encountered which vary appreciably from those described herein, HWA should be notified to review the recommendations made in this report, and revise, if necessary. If there is a substantial lapse of time between submission of this report and the start of construction, or if conditions change due to construction operations, it is recommended that this report be reviewed to determine the applicability of the conclusions and recommendations considering the changed conditions and time lapse. This report is issued with the understanding that it is the responsibility of the owner, or the owners’ representative, to ensure that the information and recommendations are brought to the attention of the appropriate design team personnel and incorporated into the project plans and specifications, and the necessary steps are taken to see that the contractor and subcontractors carry out such recommendations in the field. We recommend HWA be retained to monitor construction, evaluate subgrade soil conditions as they are exposed, and verify that subgrade preparation, backfilling, and compaction are accomplished in accordance with the specifications. Within the limitations of scope, schedule and budget, HWA attempted to execute these services in accordance with generally accepted professional principles and practices in the fields of geotechnical and pavement engineering at the time the report was prepared. No warranty, express or implied, is made. The scope of our work did not include environmental assessments or evaluations regarding the presence or absence of wetlands or hazardous or toxic substances in the soil, surface water, or ground water at this site. © 2023 Microsoft Corporation © 2023 Maxar ©CNES (2023) Distribution Airbus DS © 2023 TomTom © 2023 Microsoft Corporation © 2023 TomTom CF 2023-027-21 SITE AND VICINITY MAP RENTON MUNICIPAL AIRPORT TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS - PHASE 1 PREDESIGN RENTON, WASHINGTON 0 500'1000'1500'2000' SCALE: 1" = 1000' VICINITY MAP SITE MAP 0 3000'6000'9000'12000' SCALE: 1" = 6000' SITE SP 1 DRAWN BY: PROJECT # C:\USERS\CFRY\DESKTOP\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A.DWG <1> Plotted: 11/21/2023 9:25 AM CHECK BY: FIGURE NO.: DBE/MWBE © 2023 Microsoft Corporation © 2023 Maxar ©CNES (2023) Distribution Airbus DS AH E A D LA N E ON E M P H 1 5 SITE & EXPLORATION PLAN 2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS - PHASE 1 PREDESIGN RENTON, WASHINGTON BASE MAP PROVIDED BY: BING AND CENTURY WEST 11.14.2023 0 50 100 150 200 SCALE: 1" = 100' RENTON MUNICIPAL AIRPORT Scale: 1" = 100'-0" RENTON MUNICIPAL AIRPORT W PERIMETER RD AI R P O R T W A Y SP/BKH CF FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A.DWG <2A> Plotted: 12/14/2023 8:33 PM 2A DBE/MWBE MA T C H L I N E S E E 2 B EXPLORATION LEGEND B-1 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION CORE-1 PAVEMENT CORE DESIGNATION AND APPROXIMATE LOCATION TP-1 TEST PIT DESIGNATION AND APPROXIMATE LOCATION B-1 B-2 B-3 CORE-1 CORE-2 CORE-3 TP-1 TP-2 TP-3 TA X I W A Y A 7FW D S T A . FW D S T A . TP-22 © 2023 Microsoft Corporation © 2023 Maxar ©CNES (2023) Distribution Airbus DS AH E A D LA N E ON E AH E A D LA N E ON E AH E A D LA N E ON E RENTON MUNICIPAL AIRPORT TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS - PHASE 1 PREDESIGN RENTON, WASHINGTON BASE MAP PROVIDED BY: BING AND CENTURY WEST 11.14.2023 0 50 100 150 200 SCALE: 1" = 100' RENTON MUNICIPAL AIRPORT Scale: 1" = 100'-0" RENTON MUNICIPAL AIRPORT W PERIMETER RD SP/BKH CFSITE & EXPLORATION PLAN 2023-027-21 FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A.DWG <2B> Plotted: 12/14/2023 8:34 PM 2B DBE/MWBE MA T C H L I N E S E E 2 C MA T C H L I N E S E E 2 A RAINIER AVE N EXPLORATION LEGEND B-4 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION CORE-4 PAVEMENT CORE DESIGNATION AND APPROXIMATE LOCATION TP-4 TEST PIT DESIGNATION AND APPROXIMATE LOCATION PIT-1 PIT DESIGNATION AND APPROXIMATE LOCATION CORE-4 CORE-5 CORE-6 CORE-7 CORE-23 CORE-8 CORE-9 CORE-22 B-4 B-5 B-6 B-25 B-24 B-7 B-8 B-9 B-21 B-23 B-22 TP-4 TP-5 TP-6 TP-7 PIT-1 TA X I W A Y A 6 TAXI W A Y A 5 FW D S T A . FWD S T A . TP-21 TP-20 © 2023 Microsoft Corporation © 2023 Maxar ©CNES (2023) Distribution Airbus DS MP H 15 MP H 15 MP H 15 MP H 15 RENTON MUNICIPAL AIRPORT TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS - PHASE 1 PREDESIGN RENTON, WASHINGTON BASE MAP PROVIDED BY: BING AND CENTURY WEST 11.14.2023 0 50 100 150 200 SCALE: 1" = 100' RENTON MUNICIPAL AIRPORT Scale: 1" = 100'-0" RENTON MUNICIPAL AIRPORT SP/BKH CFSITE & EXPLORATION PLAN 2023-027-21 FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A.DWG <2C> Plotted: 12/14/2023 8:34 PM 2C DBE/MWBE MA T C H L I N E S E E 2 D MA T C H L I N E S E E 2 B EXPLORATION LEGEND B-11 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION CORE-11 PAVEMENT CORE DESIGNATION AND APPROXIMATE LOCATION TP-8 TEST PIT DESIGNATION AND APPROXIMATE LOCATION B-10 B-20 B-11 B-19 B-18 B-12 CORE-21 CORE-11 CORE-20 CORE-12 CORE-19 CORE-18 CORE-13 CORE-10 TP-8 TP-9 TP-10 TP-11 TP-12 TA X I W A Y A 4 TA X I W A Y A 3 FW D S T A . FW D S T A . TP-19 TP-18 © 2023 Microsoft Corporation © 2023 Maxar ©CNES (2023) Distribution Airbus DS MP H 15 MP H 15 RENTON MUNICIPAL AIRPORT TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS - PHASE 1 PREDESIGN RENTON, WASHINGTON BASE MAP PROVIDED BY: BING AND CENTURY WEST 11.14.2023 0 50 100 150 200 SCALE: 1" = 100' RENTON MUNICIPAL AIRPORT Scale: 1" = 100'-0" RENTON MUNICIPAL AIRPORT EXPLORATION LEGEND B-13 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION SP/BKH CFSITE & EXPLORATION PLAN 2023-027-21 FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A\2023-027-21 RENTON MUNICIPAL AIRPORT TAXIWAY A.DWG <2D> Plotted: 12/14/2023 8:35 PM 2D DBE/MWBE MA T C H L I N E S E E 2 C CORE-14 PAVEMENT CORE DESIGNATION AND APPROXIMATE LOCATION TP-13 TEST PIT DESIGNATION AND APPROXIMATE LOCATION B-13 B-17 B-16 B-14 B-15 CORE-14 CORE-17 CORE-16 CORE-15 TP-13 TP-14 TP-15 TP-16 T A X I W A Y A 2 T A X I W A Y A 1 FW D S T A . FW D S T A . TP-17 MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 3 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 0+00 5+00 10+00 15+00 20+00 25+00 30+00 35+00 40+00 45+00 50+00 55+00 De f l e c t i o n , m i l s Station, feet Taxiway A -Maximum Deflection Normalized to 25,000-pound Load 15 Feet W of CL 4 Feet W of CL 15 Feet E of CL MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 4 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 0+00 0+50 1+00 1+50 2+00 2+50 De f l e c t i o n , m i l s Station, feet Taxiway A1 -Maximum Deflection Normalized to 25,000-pound Load TWY A1 N of CL TWY A1 S of CL MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 5 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 0+00 0+50 1+00 1+50 De f l e c t i o n , m i l s Station, feet Taxiway A2 -Maximum Deflection Normalized to 25,000-pound Load TWY A2 N of CL TWY A2 S of CL MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 6 2023-027 FIGURE NO. PROJECT NO. 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 0+00 0+50 1+00 1+50 2+00 2+50 3+00 De f l e c t i o n , m i l s Station, feet Taxiway A3 -Maximum Deflection Normalized to 25,000-pound Load TWY A3 N of CL TWY A3 S of CL MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 7 2023-027 FIGURE NO. PROJECT NO. MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 8 2023-027 FIGURE NO. PROJECT NO. 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 0+00 0+50 1+00 1+50 2+00 2+50 3+00 De f l e c t i o n , m i l s Station, feet Taxiway A5 -Maximum Deflection Normalized to 25,000-pound Load TWY A5 N of CL TWY A5 S of CL MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 9 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 0+00 0+50 1+00 1+50 2+00 De f l e c t i o n , m i l s Station, feet Taxiway A6 -Maximum Deflection Normalized to 25,000-pound Load TWY A6 N of CL TWY A6 S of CL MAXIMUM DEFLECTIONS NORMALIZED TO 25K LB LOAD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 10 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 0+00 0+50 1+00 1+50 2+00 De f l e c t i o n , m i l s Station, feet Taxiway A7 -Maximum Deflection Normalized to 25,000-pound Load TWY A7 N of CL TWY A7 S of CL SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 11 2023-027 FIGURE NO. PROJECT NO. SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 12 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 0+00 0+50 1+00 1+50 2+00 2+50 Su r f a c e M o d u l u s , k s i Station, feet Taxiway A1 -Surface Modulus @ 48 inches TWY A1 N of CL TWY A1 S of CL SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 13 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 0+00 0+50 1+00 1+50 Su r f a c e M o d u l u s , k s i Station, feet Taxiway A2 -Surface Modulus @ 48 inches TWY A2 N of CL TWY A2 S of CL SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 14 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 0+00 0+50 1+00 1+50 2+00 2+50 3+00 Su r f a c e M o d u l u s , k s i Station, feet Taxiway A3 -Surface Modulus @ 48 inches TWY A3 N of CL TWY A3 S of CL SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 15 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 0+00 0+50 1+00 1+50 Su r f a c e M o d u l u s , k s i Station, feet Taxiway A4 -Surface Modulus @ 48 inches TWY A4 N of CL TWY A4 S of CL SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 16 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 0+00 0+50 1+00 1+50 2+00 2+50 3+00 Su r f a c e M o d u l u s , k s i Station, feet Taxiway A5 -Surface Modulus @ 48 inches TWY A5 N of CL TWY A5 S of CL SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 17 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 0+00 0+50 1+00 1+50 2+00 Su r f a c e M o d u l u s , k s i Station, feet Taxiway A6 -Surface Modulus @ 48 inches TWY A6 N of CL TWY A6 S of CL SUBGRADE RESILIENT MODULUS (KSI) TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 18 2023-027 FIGURE NO. PROJECT NO. 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 0+00 0+50 1+00 1+50 2+00 Su r f a c e M o d u l u s , k s i Station, feet Taxiway A7 -Surface Modulus @ 48 inches TWY A7 N of CL TWY A7 S of CL COMPARISON OF Mr CALCULATION METHOD TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 19 2023-027 FIGURE NO. PROJECT NO. HISTORIC LAKE WASHINGTON SHORELINE TAXIWAY A REHABILITATION/RECONSTRUCTION & ASSOCIATED IMPROVEMENTS – PHASE 1 PREDESIGN RENTON, WASHINGTON 20 2023-027 FIGURE NO. PROJECT NO. NOT TO SCALE EXPLANATION Image Credit: Historical Changes to Lake Washington and Route of the Lake Washington Ship Canal, King County Washington. By Michael Chrzastowski, 1983. USGS 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Appendix A Field Exploration A-12023-027 Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Renton, Washington Associated Improvements - Phase 1 Predesign SYMBOLS USED ON EXPLORATION LOGS LEGEND OF TERMS AND Clean Gravel (little or no fines) More than 50% of Coarse Fraction Retained on No. 4 Sieve Gravel with SM SC ML MH CH OH RELATIVE DENSITY OR CONSISTENCY VERSUS SPT N-VALUE Very Loose Loose Medium Dense Very Dense Dense N (blows/ft) 0 to 4 4 to 10 10 to 30 30 to 50 over 50 Approximate Relative Density(%) 0 - 15 15 - 35 35 - 65 65 - 85 85 - 100 COHESIVE SOILS Consistency Very Soft Soft Medium Stiff Stiff Very Stiff Hard N (blows/ft) 0 to 2 2 to 4 4 to 8 8 to 15 15 to 30 over 30 Approximate Undrained Shear Strength (psf) <250 250 - No. 4 Sieve Sand with Fines (appreciable amount of fines) amount of fines) More than 50% Retained on No. 200 Sieve Size Sand and Sandy Soils Clean Sand (little or no fines) 50% or More of Coarse Fraction Passing Fine Grained Soils Silt and Clay Liquid Limit Less than 50% 50% or More Passing No. 200 Sieve Size Silt and Clay Liquid Limit 50% or More 500 500 - 1000 1000 - 2000 2000 - 4000 >4000 DensityDensity USCS SOIL CLASSIFICATION SYSTEM Coarse Grained Soils Gravel and Gravelly Soils Highly Organic Soils GROUP DESCRIPTIONS Well-graded GRAVEL Poorly-graded GRAVEL Silty GRAVEL Clayey GRAVEL Well-graded SAND Poorly-graded SAND Silty SAND Clayey SAND SILT Lean CLAY Organic SILT/Organic CLAY Elastic SILT Fat CLAY Organic SILT/Organic CLAY PEAT MAJOR DIVISIONS GW SP CL OL PT GP GM GC SW COHESIONLESS SOILS Fines (appreciable LEGEND 2023-027.GPJ 11/10/23 PROJECT NO.:FIGURE: Coarse sand Medium sand SIZE RANGE Larger than 12 in Smaller than No. 200 (0.074mm) Gravel 3 in to 12 in 3 in to No 4 (4.5mm) No. 4 (4.5 mm) to No. 200 (0.074 mm) COMPONENT DRY Absence of moisture, dusty, dry to the touch. MOIST COMPONENT DEFINITIONS time of drilling) Groundwater Level (measured in well or open hole after water level stabilized) Groundwater Level (measured at TEST SYMBOLS GROUNDWATER SYMBOLS AL Atterberg Limits: California Bearing Ratio CN Consolidation DD OC Organic Content pH pH of Soils 12 - 30% Clayey, Silty, Sandy, Gravelly 3 in to 3/4 in 3/4 in to No 4 (4.5mm) No. 4 (4.5 mm) to No. 10 (2.0 mm) No. 10 (2.0 mm) to No. 40 (0.42 mm) No. 40 (0.42 mm) to No. 200 (0.074 mm) NOTES: Soil classifications presented on exploration logs are based on visual and laboratory observation. Density/consistency, color, modifier (if any) GROUP NAME, additions to group name (if any), moisture content. Proportion, gradation, and angularity of constituents, additional comments. (GEOLOGIC INTERPRETATION) Please refer to the discussion in the report text as well as the exploration logs for a more complete description of subsurface conditions. Soil descriptions are presented in the following general order: < 5% Damp but no visible water. WET Visible free water, usually soil is below water table. Boulders Cobbles Coarse gravel Fine gravel Sand MOISTURE CONTENT COMPONENT PROPORTIONS Fine sand Silt and Clay 5 - 12% PROPORTION RANGE DESCRIPTIVE TERMS Clean Slightly (Clayey, Silty, Sandy) 30 - 50% Components are arranged in order of increasing quantities. Very (Clayey, Silty, Sandy, Gravelly) PID PP CBR DS Direct Shear GS Grain Size Distribution K Permeability Moisture/Density Relationship (Proctor) Resilient Modulus Photoionization Device Reading Res. Resistivity SG Percent Fines%F MD MR Specific Gravity CD Consolidated Drained Triaxial Torvane (Approx. Shear Strength, tsf) Dry Density (pcf) CU Consolidated Undrained Triaxial TV UU Unconsolidated Undrained Triaxial UC Unconfined Compression SAMPLE TYPE SYMBOLS Non-standard Penetration Test (3.0" OD Split Spoon with Brass Rings) (140 lb. hammer with 30 in. drop) Shelby Tube Small Bag Sample Large Bag (Bulk) Sample Core Run 2.0" OD Split Spoon (SPT) PL = Plastic Limit, LL = Liquid Limit Pocket Penetrometer (Approx. Comp. Strength, tsf) 3-1/4" OD Split Spoon GS GS GS S-1 S-2 S-3 S-4 S-5 S-6 S-7 5.5 inches Hot Mix Asphalt. (HMA) 11.5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 5 inches Portland Cement Concrete. (PCC) Dense, very dark grayish-brown, fine to coarse, rounded, well graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Dense, dark grayish-brown, fine to coarse, rounded, poorly graded GRAVEL with silt, sand and cobbles, moist. Dense, dark gray, silty SAND, moist. (FILL) Very loose, dark brown, silty SAND with organics, moist, to sandy SILT with peat and trace gravels, moist. (ALLUVIUM) Medium dense, gray, silty, fine to coarse GRAVEL with sand and cobbles, wet. Medium dense, gray, fine to coarse, poorly graded GRAVEL with silt and sand, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 8 feet below ground surface. 3-2-1 14-15-11 GW GP GM SM SM GM GP GM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 1 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-2 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/11/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2A DATE STARTED: 9/11/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 29.7 feet GS GS GS S-1 S-2 S-3 S-4 S-5 2 inches Hot Mix Asphalt. (HMA) 6 inches Crushed Base. Dense, dark grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 4 inches Portland Cement Concrete. (PCC) Dense, brown, silty, fine to coarse, rounded GRAVEL with sand, moist. (FILL) Medium dense, dark gray, silty, fine to medium SAND, moist. Trace gravel. Dense, very dark gray, silty SAND, moist. Very dense, very dark gray, silty SAND, moist. Very dense, very dark gray, silty SAND. Medium dense, very dark gray, silty, fine to coarse, sub-rounded GRAVEL with sand and cobbles, moist. (ALLUVIUM) Drove sampler on a cobble. Blow counts are overstated. Borehole was terminated at 10.6 feet below ground surface. No groundwater seepage was observed during the exploration. 18-40-38 30-50/1 GM SM SM SM SM GM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 2 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-3 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2A DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller >> >> SURFACE ELEVATION: 25.2 feet GS GS S-1 S-2 S-3 S-4 6.5 inches Hot Mix Asphalt. (HMA) 7 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 2 inches low quality asphalt. (HMA) Dense, gray, silty, fine to coarse GRAVEL with sand and cobbles, moist. (FILL) Medium dense, very dark gray, silty SAND with gravel. Medium dense, gray, silty, GRAVEL with sand, moist. (ALLUVIUM) Medium dense, olive, silty SAND with gravel, very moist to wet. Rounded, fine to coarse gravel. Becomes wet at 7 feet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 7 feet below ground surface. 7-6-5 7-9-11 GM SM GM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 3 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-4 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2A DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 24.5 feet GS GS GS S-1 S-2 S-3 S-4 S-5 S-6 S-7 4.5 inches Hot Mix Asphalt. (HMA) 8.5 inches Portland Cement Concrete. (PCC) Dense, very dark gray, poorly graded, coarse, sub-rounded GRAVEL with silt and sand, moist. (GRAVEL BORROW FILL) Dense, gray, silty, SAND with gravel, moist. Coarse, sub-rounded gravel. (FILL) Very soft, dark olive-gray, SILT with sand and trace organics, moist. (ALLUVIUM) Very loose, dark gray, silty SAND, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 8 feet below ground surface. 1-0-1 4-7-10 GP GM SM ML SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 4 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-5 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/11/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/11/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 23.5 feet GS GS GS S-1 S-2 S-3 S-4 5 inches Hot Mix Asphalt. (HMA) 3 inches Crushed Base. (CRUSHED BASE) 7 inches Portland Cement Concrete. (PCC) Dense, very dark gray, fine to coarse, rounded, poorly graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Very soft, dark olive-gray, SILT with sand and rootlets, moist. (ALLUVIUM) Very loose, very dark gray, fine to coarse, poorly graded SAND, wet. 3 inch thick anthracite coal layer. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4 feet below ground surface. 3-1-1 0-0-0 GP ML SP BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 5 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-6 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 24.2 feet GS GS S-1 S-2 6 inches Hot Mix Asphalt. (HMA) 6 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 5 inches Portland Cement Concrete. (PCC) Dense, grayish-brown, fine to coarse, rounded, poorly graded GRAVEL with silt and sand, moist. (GRAVEL BORROW FILL) Medium dense, dark gray, silty SAND, moist. (FILL) Very soft, very dark grayish-brown, sandy SILT, moist. Lenses of woody debris and rootlets. (ALLUVIUM) Very soft, dark olive-gray, sandy SILT, moist. Becomes wet at 9.5 feet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 9.5 feet below ground surface. 1-0-0 1-1-3 GP GM SM ML ML BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 6 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-7 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 22.3 feet GSS-1 S-2 5 inches Hot Mix Asphalt. (HMA) 5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL, moist. (CRUSHED BASE) 5 inches Portland Cement Concrete. (PCC) Dense, grayish-brown, fine to coarse, rounded, poorly graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Loose, grayish-brown, very silty SAND, moist. (FILL) Very loose, dark gray, silty, medium SAND with wood fragments, wet. (ALLUVIUM) Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4.5 feet below ground surface. 1-1-0 1-1-0 GP SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 7 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-8 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 21.4 feet GS GS GS GS S-1 S-2 S-3 S-4 3.5 inches Hot Mix Asphalt. (HMA) 17.5 inches Crushed Base. Dense, dark grayish-brown, fine, crushed GRAVEL with silt and sand, moist. (CRUSHED BASE) 9 inches Crushed Base. Dense, dark gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. Medium stiff, dark grayish-brown, sandy SILT with rootlets, moist. (ALLUVIUM) Soft, dark olive-brown, organic SILT, moist. Soft stiff, dark grayish-brown SILT, moist. Becomes wet. Occassional sand lenses. Becomes dark olive-gray. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface. 0-0-3 0-0-0 ML OL ML BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 8 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-9 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/15/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller 139 SURFACE ELEVATION: 22.0 feet GS GS S-1 S-2 9.5 inches Hot Mix Asphalt. (HMA) 5.5 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Dense, dark gray, fine to coarse, rounded, poorly graded GRAVEL with silt and sand, moist. (GRAVEL BORROW FILL) 3-inch cobble at contact. Soft, dark gray, sandy SILT, moist. Trace, sub-rounded, coarse gravel, moist. (ALLUVIUM) Very loose, very dark gray, silty, fine SAND with trace organics, wet. Interbedded with 3 inch lenses of organics and sand with silt. Becomes dark olive-brown. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was obsered at 5 feet below ground surface. 0-0-0 0-0-0 GP GM ML SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 9 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-10 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 22.7 feet GS GS S-1 S-2 S-3 S-4 4 inches Hot Mix Asphalt. (HMA) 4 inches Crushed Base. Dense, dark grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 2.5 inches Low Quality Hot Mix Asphalt. (HMA) 3.5 inches Portland Cement Concrete. (PCC) 4 inches Crushed Base. Dense, dark gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CSBC) Dense, grayish-brown, fine to coarse, rounded, poorly graded GRAVEL with silt and sand, moist. (GRAVEL BORROW FILL) Medium dense, dark grayish-brown, very silty, fine SAND, moist. (FILL) Medium dense, olive, poorly graded SAND with silt and rootlets, moist. Very soft, olive, SILT with organics, moist. (ALLUVIUM) Very loose, dark gray, very silty SAND, wet. Very soft, dark olive-brown, sandy SILT with trace organics, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 6 feet below ground surface. 0-0-0 0-0-0 GP GM SM SP SM ML SM ML BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-10 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-11 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/13/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2C DATE STARTED: 9/13/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 24.3 feet GS GS S-1 S-2 7 inches Hot Mix Asphalt. (HMA) 19 inches Crushed Surfacing Base Course. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CSBC) 5 inches Portland Cement Concrete. (PCC) Dense, dark grayish-brown, GRAVEL with silt and sand, moist. Trace cobbles. (GRAVEL BORROW FILL) Dense, dark gray, silty SAND with gravel, moist. Gravel component is fine, rounded. (FILL) Medium dense, dark gray, fine to coarse, silty SAND with gravel, wet. Gravel component is fine, rounded. 2-feet of recovery in 5-foot section. (ALLUVIUM) Grain size decreases to medium sand. Loose, dark olive-gray, silty SAND, wet. Interbedded with sandy SILT. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface. 7-11-6 2-2-2 GP GM SM SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-11 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-12 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/13/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2C DATE STARTED: 9/13/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 24.7 feet GS GS S-1 S-2 S-3 9 inches Hot Mix Asphalt. (HMA) 3 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Medium dense, brown, poorly graded SAND with silt and gravel, moist. Scattered fine to coarse, sub-angular gravel. (FILL) Very loose, dark olive-gray, silty SAND, moist. (ALLUVIUM) Becomes wet at 6 feet. 6 inches of woody debris. Very loose, dark gray, silty SAND, wet. Very loose, dark gray, fine to medium, poorly graded SAND with silt, wet. Grades to silty, fine SAND bottom 3-inches of sample. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 6 feet below ground surface. 1-0-0 0-1-0 SP SM SM SM SP SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-12 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-13 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2C DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 27.8 feet GS GS S-1 S-2 3 inches Hot Mix Asphalt. (HMA) 13 inches Crushed Base. Dense, dark gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CSBC) 5 inches Portland Cement Concrete. (PCC) Medium dense, dark grayish-brown, fine to coarse, crushed and rounded, poorly graded GRAVEL with silt and sand, moist. Gravels up to 2.5 inch diameter. (GRAVEL BORROW FILL) Medium dense, very dark gray, poorly graded SAND with silt and gravel, wet. (ALLUVIUM) 3 inch cobble at contact. Loose, very dark gray, silty, fine SAND with gravel, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface. 11-14-14 1-0-0 GP GM SP SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-13 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-14 DE P T H (f e e t ) 0 5 10 15 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2D DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.0 feet GS GS S-1 S-2 S-3 S-4 6 inches Hot Mix Asphalt. (HMA) 14 inches Crushed Base. Dense, dark grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 3 inches Portland Cement Concrete. (PCC) Dense, very dark gray, fine to coarse, rounded, well graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Becomes dark gray. Becomes wet. Sand content decreases. Loose to medium dense, very dark gray, well-graded GRAVEL with sand, wet. No recovery from SPT. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4.5 feet below ground surface. 6-20-24 1-2-2 GW BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-14 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-15 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2D DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.6 feet GS GS GS GS S-1 S-2 S-3 S-4 4 inches Hot Mix Asphalt. (HMA) 5 inches Crushed Base. Dense, brown, sandy, fine, crushed GRAVEL with silt, moist. (CRUSHED BASE) Medium dense, very dark gray, silty SAND with gravel and cobbles, moist. (FILL) Loose, dark gray SAND with silt, gravel and cobbles. Interbedded with silty SAND, moist. Loose, very dark gray, poorly graded GRAVEL with silt, wet. Very loose, very dark gray, silty SAND with gravel, wet. (ALLUVIUM) Last cobble at 7.5-feet BGS. Very loose, very dark grayish-brown, silty SAND, wet. Encountered 4 feet of heave, removed heave by re-drilling to 10 feet. Drove sampler at 10 feet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4.5 feet below ground surface. 1-3-2 1-2-0 SM SP SM GP SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-15 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-16 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2D DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.4 feet GS GS GS S-1 S-2 S-3 S-4 6 inches Hot Mix Asphalt. (HMA) 1 inch Crushed Base. Dense, brown, sandy, fine, crushed GRAVEL with silt, moist. (CRUSHED BASE) 3.5 inches Portland Cement Concrete. (PCC) Dense, dark gray, fine to coarse, rounded, poorly graded GRAVEL with sand, moist. Fine to coarse sand. (GRAVEL BORROW FILL) Dense, dark gray, silty, gravelly, fine SAND, moist. Fine to coarse, sub-rounded gravel. (FILL) Dense, very dark gray with gray, silty SAND, moist. Scattered coarse, rounded gravel. Medium stiff, gray with rust mottling, sandy SILT with fine to coarse gravel, moist. Very loose, very dark gray, fine to coarse, poorly graded SAND with silt and gravel, wet. (ALLUVIUM) Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 9.5 feet below ground surface. 6-7-10 0-1-1 GP SM SM ML SP SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-16 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-17 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2D DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.1 feet S-1 S-2 3 inches Hot Mix Asphalt. (HMA) 5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 4.5 inches Portland Cement Concrete. (PCC) Dense, dark olive-gray, fine to coarse, rounded, poorly graded GRAVEL with silt and sand, moist. (GRAVEL BORROW FILL) Medium dense, dark gray, very silty SAND with fine to coarse, rounded gravel, moist. (FILL) Loose, dark gray, fine to coarse, poorly graded SAND with silt and gravel, wet. Fine to coarse, rounded gravel. (ALLUVIUM) Silt content increases. Very loose, dark gray, coarse, poorly graded SAND with silt and fine, rounded gravel, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface. 5-3-2 1-0-0 GP GM SM SP SM SP SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-17 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-18 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/13/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2D DATE STARTED: 9/13/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.1 feet %F AL S-1 S-2 S-3 4.5 inches Hot Mix Asphalt. (HMA) 15.5 inches Crushed Base. Dense, gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 3 inches Low Quality Hot Mix Apshalt. (HMA) 6 inches Crushed Base. Dense, gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 6 inches Portland Cement Concrete. (PCC) Loose, dark gray, fine to coarse, sub-rounded to angular, poorly graded GRAVEL with silt, sand, and cobbles, moist. (GRAVEL BORROW FILL) Loose, dark gray, fine to coarse SAND with silt and gravel, wet. Fine to coarse, rounded gravel. (ALLUVIUM) No recovery from SPT. Very soft, dark olive-brown, lean CLAY with sand and woody debris, wet. No recovery from SPT. Borehole was terminated at 10 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface. 5-5-4 0-0-1 GP GM SP SM CL BORING-DSM 2023-027.GPJ 12/22/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-18 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-19 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/13/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2C DATE STARTED: 9/13/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.5 feet GS GS S-1 S-2 S-3 4 inches Hot Mix Asphalt. (HMA) 24 inches Crushed Base. Dense, dark gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 5 inches Portland Cement Concrete. (PCC) Dense, dark gray, fine to coarse, rounded, poorly graded GRAVEL with silt and sand, moist. (GRAVEL BORROW FILL) Medium stiff, very dark gray, sandy SILT, moist. (ALLUVIUM) Soft, very dark grayish-brown SILT with sand, wet. Very loose, dark gray, medium, poorly graded SAND with silt, wet. Very soft, dark grayish-brown, sandy SILT with rootlets, wet. Very loose, dark gray, fine, poorly graded SAND with silt, wet. Poor recovery. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 7 feet below ground surface. 3-3-3 0-0-0 GP GM ML ML SP SM ML SP SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-19 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-20 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2C DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 27.6 feet GS GS GS S-1 S-2 S-3 S-4 3.5 inches Hot Mix Asphalt. (HMA) 14.5 inches Crushed Base. Dense, olive-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Dense, brown, fine to coarse, rounded, poorly graded GRAVEL with sand and cobbles, moist. (GRAVEL BORROW FILL) Becomes dark yellowish-brown. Medium dense, very dark gray, poorly graded SAND with silt and coarse, sub-rounded gravel, moist. (ALLUVIUM) Medium dense, very dark gray, poorly graded SAND with gravel, moist. Becomes very loose, no recovery from SPT. Borehole was terminated at 11.5 feet below ground surface. No groundwater seepage was observed during the exploration. 9-11-9 1-0-0 GP SP SM SP BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-20 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-21 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/13/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2C DATE STARTED: 9/13/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 26.4 feet GS %F AL S-1 S-2 S-3 S-4 4 inches Hot Mix Asphalt. (HMA) 5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Dense, dark yellowish-brown, fine to coarse, rounded, well graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Loose, dark gray, silty SAND with gravel, moist. Coarse, rounded gravel. (FILL) Very loose, brown and gray, silty SAND, moist. (ALLUVIUM) Loose, dark gray, poorly graded SAND with silt, moist. Very soft, tan and very dark gray, organic SILT with sand, moist. Becomes dark gray. Very loose, dark gray, fine to coarse, poorly graded SAND with gravel, wet. Very soft, dark gray, sandy SILT, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 9.5 feet below ground surface. 1-0-1 1-0-1 GW SM SM SP SM OH SP ML BORING-DSM 2023-027.GPJ 12/22/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-21 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-22 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller >>111 SURFACE ELEVATION: 25.6 feet GS GS GS S-1 S-2 S-3 S-4 5.5 inches Hot Mix Asphalt. (HMA) 4.5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Dense, dark yellowish-brown, fine to coarse, sub-rounded, poorly graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Very soft, very dark brown and gray, laminated, sandy SILT, moist. (ALLUVIUM) Silt content decreases, lenses of brown organics. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface. 0-0-0 0-1-0 GP ML BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-22 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-23 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.7 feet GS GS S-1 S-2 S-3 S-4 3 inches Hot Mix Asphalt. (HMA) Dense, brown, silty, fine to coarse, rounded GRAVEL with sand moist. (FILL) Loose, blue-gray, silty SAND with gravel, moist. Very soft, very dark gray, SILT with sand, moist. (ALLUVIUM) Becomes wet. Very loose, very dark gray, silty, fine SAND, wet. Very loose, dark brown and gray, silty SAND to sandy SILT with trace organics and rootlets, wet. Very loose, dark gray, silty, fine SAND with lenses of dark brown, organic SILT, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4.5 feet below ground surface. 0-1-0 0-1-2 GM SM ML SM SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-23 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-24 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.7 feet GS GS GS S-1 S-2 S-3 S-4 S-5 7 inches Hot Mix Asphalt. (HMA) 13 inches Crushed Base. Dense, dark brown, silty, fine to coarse, crushed GRAVEL with sand, moist. (CRUSHED BASE) Medium dense, very dark gray, silty GRAVEL with sand, moist. Coarse, fractured gravel up to 2 inches. (FILL) Medium stiff, very dark gray, SILT with sand and trace organics, moist. Very soft to soft, very dark gray, sandy SILT with trace organics, laminated, moist. (ALLUVIUM) Very loose, dark gray, medium to coarse, poorly graded SAND, wet. No recovery in SPT. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 9.5 feet below ground surface. 1-2-1 0-0-0 GM ML ML SP BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-24 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-25 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/11/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/11/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 24.2 feet GS GS GS S-1 S-2 S-3 S-4 S-5 6 inches Hot Mix Asphalt. (HMA) Dense, very dark brown, coarse, rounded, poorly graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Becomes gray, fines increase. Soft, very dark gray, sandy SILT with trace organics, moist. Trace, fine, rounded gravel. (ALLUVIUM) Very loose, very dark gray, fine to coarse, poorly graded SAND, wet. Very loose, dark gray, silty, fine SAND with peat lenses. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 8.5 below ground surface. 0-1-1 0-0-0 GP ML SP SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-25 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-26 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/11/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/11/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 24.8 feet S-1 GS GP 3.25 inches Hot Mix Asphalt. 1 lift, cracked through full depth. Cored on sealed, high severity, longitudinal crack. (HMA) 4.75 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 5.75 inches Portland Cement Concrete. Cored with 4-inch diameter core barrel. (PCC) Medium dense, brown, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 18 inches below ground surface due to refusal on cobble. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 1 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-27 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2A 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS GP 7.5 inches Hot Mix Asphalt. 4 lifts: 1.75" x 2" x 1.5" x 2.25". Cracking extends through upper two lifts. All lifts are bonded. High air voids in upper two lifts. Cored on high severity longitudinal crack. (HMA) 3.5 inches Crushed Base. Medium dense to dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. Some rounded gravel. (CRUSHED BASE) 9 inches Portland Cement Concrete. Half of the core hit the east edge of concrete panel. Other half of core contained medium dense, brown, sandy, fine to coarse GRAVEL with silt, moist. (Gravel Borrow) (PCC) Medium dense, brown, sandy, fine to coarse, rounded GRAVEL, moist. Begins at 11" BGS, alongside PCC, on western half of core. (GRAVEL BORROW FILL) Corehole was terminated at 24 inches below ground surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 2 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-28 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2A 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS GP 7 inches Hot Mix Asphalt. 4 lifts, 2" x 1.5" x 0.5" x 3". The 0.5" layer crumbled apart during coring. Cored on sealed, medium severity longitudinal crack. (HMA) 7 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. Orange brick fragment. (CRUSHED BASE) 2.25 inches Hot Mix Asphalt. 2 lifts, 1.5" x 0.75". Lifts bonded, no cracking. Cored with 4-inch diameter core barrel. (HMA) 5.75 inches Portland Cement Concrete. Cored with 4-inch diameter core barrel. (PCC) Dense, gray. sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 24 inches below ground surface. No groundwater seepage was encountered during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 3 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-29 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2A 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A GP 11.5 inches Hot Mix Asphalt. Top lift 3 inches. Top 4 inches cracked through. Bottom 8.5 inches high air voids with lifts undiscernable. Cored on sealed, high severity, longitudinal crack. (HMA) 9 inches Portland Cement Concrete. Cored on key joint. (PCC) Medium dense, gray, sandy, fine to coarse, rounded GRAVEL, moist. (GRAVEL BORROW FILL) Corehole was terminated at 25 inches below ground surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 4 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-30 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A 3.5 inches Hot Mix Asphalt. 1 lift, cracked through. Cored on sealed, high severity, transverse crack. (HMA) 4.5 inches poor quality, recycled asphalt. (HMA) Portland Cement Concrete. Chipped through a portion, cored on PCC trasnverse joint. (PCC) Corehole was terminated at 11 inches below ground surface. Unable to core through PCC due to irregular surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 5 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-31 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A 4.5 inches Hot Mix Asphalt. 2 lifts, 2" x 2.5". Lifts bonded and cracked through. Crack seal on top of lower lift. Cored on intersection of sealed, high severity longitudinal and transverse cracks. (HMA) 2.5 inches Crushed Base. Very dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 5 inches Hot Mix Asphalt. Poor condition, crumbled. (HMA) Portland Cement Concrete. Very rough surface, could not core through. (PCC) Corehole was terminated at 12 inches below ground surface. Could not core through PCC due to rough surface. No groundwater seepage was encountered during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 6 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-32 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A6 S-1 GS GP 13.25 inches Hot Mix Asphalt. 5 lifts, 3" x 2" x 2.25" x 3.25" x 2.75". All lifts bonded. Cracking extends through full depth of core. Cored on medium to high severity, sealed, transverse crack. Bottom two lifts have larger aggregate, up to 1" and rounded. (HMA) 7.75 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Medium dense, brown, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 24 inches below ground surface. No groundwater seepage was encountered during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 7 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-33 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS GP 7.75 inches Hot Mix Asphalt. 3 lifts, 3.25" x 2.5" x 2". Upper lift unbonded. Cracking through upper lift, takes jog 1.5 inches down. Top of second lift soft, about 1 inch. (HMA) 9.25 inches Crushed Base. Very dense, gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. Some coarse, rounded gravels mixed into CSBC. (CRUSHED BASE) Medium dense to dense, brown, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 20 inches below ground surface. No groundwater seepage was encountered during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 8 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-34 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS GP 3 inches Hot Mix Asphalt. 1 lift. Cored on low severity, sealed longitudinal crack. Hairline crack extends through core. Cored 7 feet south of original marked location to avoid located power line. (HMA) 5.5 inches Crushed Base. Dense, brownish gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 2.5 inches Hot Mix Apshalt. 1 lift. No cracks. (HMA) 6 inches Portland Cement Concrete. Broken into 4 pieces, cracked through full depth. (PCC) Dense, gray, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole terminated at 18 inches below ground surface. No groundwater seepage was encountered during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core- 9 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-35 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS GP 7.5 inches Hot Mix Asphalt. 3 lifts, 2" x 2.5" x 3". All lifts unbonded. Cored on low severity longitudinal crack. Crack extends 1 inch into upper lift. (HMA) 10.5 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Becomes gray at 12 inches below ground surface. Dense, brown, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 20 inches below ground surface. No groundwater seepage was encountered during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-10 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-36 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A4 6 inches Hot Mix Asphalt. 2 lifts, 3" x 3". Lifts bonded. Cored on sealed, low severity longitudinal crack. Crack extends 1 inch into upper lift. (HMA) 0.5 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 1.5 inches Hot Mix Asphalt. Cored with 4 inch diameter core barrel. Poor quality HMA. (HMA) Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Corehole was terminated at 9 inches below ground surface. Could not excavate further due to narrow diameter of hole. No groundwater seepage was encountered during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/26/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-11 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-37 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS GP 6.75 inches Hot Mix Asphalt. 3 lifts, 2" x 2.5" x 2.25". Cored on sealed, low severity longitudinal crack. Upper lifts degraded, able to pull gravels out from core. Crack extends 0.75" into upper lift. All lifts bonded. (HMA) 6.25 inches Crushed Base. Very dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Dense, brown, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 24 inches below ground surface. No groundwater seepage was encountered during the excavation. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/27/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-12 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-38 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A GP 6 inches Hot Mix Asphalt. 2 lifts, 2.25" x 3.75". Cored in rut from 737 wheels and sealed, medium severity alligator cracking. Cracked through upper lift. Lifts bonded. (HMA) 1.5 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. Partially rounded gravels included. (CRUSHED BASE) 6 inches Hot Mix Asphalt. 2 lifts, disintegrated at contact. Very poor condition. (HMA) Dense, brown, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 16 inches below ground surface. No groundwater seepage was encountered during the exploraiton. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/27/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-13 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-39 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS 7 inches Hot Mix Asphalt. Very poor quality. Cored in 737 rutting and sealed alligator cracking. Top 1.5 inches came out in three pieces, held together by sealant. Remaining 5.5 inches non-cohesive, had to be removed with digging bar and hammer drill. (HMA) 12.5 inches Crushed Base. Dense, brownish gray, silty, sandy, fine to coarse, crushed GRAVEL, moist. Poor quality, very silty. (CRUSHED BASE) Hot Mix Asphalt. Unable to core through. (HMA) Corehole was terminated at 19.5 inches below ground surface. Could not core through bottom layer of asphalt as it was out of reach of core barrel extension. No groundwater seepage was encountered during the excavation. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/27/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-14 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-40 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2D 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 S-2 GS GS AL SM CL 19 1 inch Hot Mix Asphalt. 1 lift, cracked into four pieces. Cored on medium to high severity alligator cracking. (HMA) 7 inches Crushed Base. Very dense, red-brown, silty, sandy, fine to coarse, crushed GRAVEL, moist. (CRUSHED BASE) Considerable asphalt debris from 6-8 inches BGS. Medium dense, dark gray, very silty SAND with gravel and shell fragments. (FILL) Medium stiff, dark gray, sandy CLAY with shell fragments. (FILL) Corehole was terminated at 16 inches below ground surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-15 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-41 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2D 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 S-2 GS GS GP 3.25 inches Hot Mix Asphalt. 1 lift, cracked through. Cored on intersection of high severity transverse and longitudinal cracks. (HMA) 2.75 inches Crushed Base. Dense, red-brown, sandy, fine, crushed GRAVEL with silt, moist. (CRUSHED BASE) 1.5 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. 6 inches Portland Cement Concrete. (PCC) Dense, brown, sandy, fine to coarse, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Corehole was terminated at 17 inches below ground surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-16 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-42 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2D 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A GP 3 inches Hot Mix Asphalt. 1 lift. Cored on sealed, medium severity, transverse crack. (HMA) 5 inches Portland Cement Concrete. Cored on transverse joint in PCC, joint filled with HMA. (PCC) Medium dense, brown, sandy, fine to coarse, rounded GRAVEL, moist. (GRAVEL BORROW FILL) Corehole was terminated at 19 inches below ground surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-17 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-43 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2D 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS 3 inches Hot Mix Asphalt. 1 lift, cracked through. Cored on sealed, high severity, longitudinal crack. (HMA) 18 inches Crushed Base. Very dense, gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Old asphalt, unkown thickness. (HMA) Corehole was terminated at 21 inches below ground surface. Could not core through bottom layer of asphalt due to uneven surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-18 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-44 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS 3.25 inches Hot Mix Asphalt. 1 lift, crack extends 1-inch into lift. Cored on low severity (hairline) longitudinal crack. In good condition. (HMA) Very dense, gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. Occassional brick chunks; good quality. (CRUSHED BASE) Corehole was terminated at 24 inches. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-19 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-45 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS 4 inches Hot Mix Asphalt. 1 lift, cracked through. Cored on sealed, low severity transverse crack. (HMA) 14 inches Crushed Base. Very dense, brownish gray, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Large, round, coarse (3") gravel encountered at 13 inches below ground surface. 3 inches Hot Mix Asphalt. 2 lifts, 1.25" x 1.75". Lifts bonded and in good condition. (HMA) Medium dense, dark gray, sandy, fine, crushed GRAVEL with silt, moist. (CRUSHED BASE) Corehole was terminated at 24 inches below ground surface. No groundwater seepage was encountered during the excavation. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/27/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-20 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-46 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS 3.25 inches Hot Mix Asphalt. Half of core disintegrated during coring. Cracked through, poor quality. (HMA) 5.75 inches Crushed Base. Very dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) 3 inches Hot Mix Asphalt. Poor quality, used rotohammer to break apart. (HMA) Portland Cement Concrete. Cored on longitudinal joint. (PCC) Corehole was terminated at 12 inches below ground surface. Could not core through concrete due to irregular surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-21 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-47 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2C 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS 4 inches Hot Mix Asphalt. 2 lifts, 3.25" x 0.75" Bottom lift disintegrated, used rotohammer to break up/extract from corehole. Cored on high severity, trasnverse crack. (HMA) 4 inches Crushed Base. Dense, brown, silty, sandy, fine to coarse, crushed GRAVEL, moist. (CRUSHED BASE) Portland Cement Concrete. Cored over badly broken transverse joint, between panels. (PCC) Corehole was terminated at 8 inches below ground surface. Could not core PCC due to uneven surface. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-22 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-48 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 GS GM 3.75 inches Hot Mix Asphalt. 1 lift, crack extending 2-inches into HMA. Cored on low severity, longitudinal crack. (HMA) 8.25 inches Crushed Base. Dense, brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Becomes very dense at 9.5 inches, up to 3-inch spalls. Very dense, gray, silty, sandy, fine to coarse GRAVEL with cobbles, moist. (FILL) Corehole was terminated at 18 inches. No groundwater seepage was observed during the exploration. SA M P L E T Y P E OT H E R T E S T S DATE COMPLETED: 6/19/23 LOGGED BY: B. Hawkins and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTIONSY M B O L PAGE: 1 of 1 Core-23 EXCAVATING EQUIPMENT: 6-inch Diameter Core Barrel PROJECT NO.: MO I S T U R E CO N T E N T ( % ) Taxiway A Rehabilitation/Reconstruction & PAVEMENT CORE FIGURE: US C S S O I L C L A S S . 2023-027 PAVEMENT CORE PHOTO (TAXIWAY) 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign A-49 DE P T H ( f e e t ) PAVEMENT CORE PHOTO LOCATION: See Figure 2B 0 1 2 3 EXCAVATION COMPANY: HWA GeoSciences Inc. Renton, Washington SA M P L E N U M B E R TAXIWAY: Taxiway A S-1 S-2 GS GP GM SM GP GP 8 Loose, brown, SAND with organics, rootlets, silt and gravel, moist. (TOPSOIL) 0.5 inches Asphalt. Hard, black, asphalted rounded GRAVEL, moist. (ASPHALT) Medium dense, brown, sandy, fine GRAVEL with silt, moist. (GRAVEL BORROW FILL) Medium dense, brown and yellow brown mottled, silty SAND with scattered fine gravel, moist. (FILL) Medium dense, brown, sandy GRAVEL with scattered wood, moist. (GRAVEL BORROW FILL) Medium dense, brown and gray, sandy, fine to coarse GRAVEL, moist to wet. (ALLUVIUM) Test pit was terminated at 8.6 feet below ground surface. Groundwater seepage was observed at 8.5 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 1 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-50 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2A SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 29±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GM SM SM GP GM Loose, brown, silty, sandy, crushed GRAVEL with rootlets, moist. (FILL) 1 inch Asphalt. Hard, black, asphalted GRAVEL, moist. (ASPHALT) Medium dense, brown, silty, sandy, fine GRAVEL, moist. (FILL) Medium dense, brown, silty SAND with scattered gravel, moist. Loose to medium dense, brown and dark grayish brown, silty SAND with organic pockets, wood, gravel, cobbles, and scattered brick fragments, moist. Loose to medium dense, gray, sandy, fine to coarse GRAVEL with silt, wet. (ALLUVIUM) Test pit was terminated at 8.2 feet below ground surface. Groundwater seepage was observed at 7.75 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 2 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-51 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2A SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 28±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GS SM ML SM 21 Loose, brown, silty SAND with gravel and rootlets, moist. (FILL) Stiff, brown and yellow brown mottled, sandy SILT with scattered gravel, moist. Loose, dark gray, very silty, fine SAND with abundant decomposing wood fragments, moist. Becomes wet at 7.8 feet bgs. (ALLUVIUM) Test pit was terminated at 8.5 feet below ground surface. Groundwater seepage was observed at 7.8 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 3 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-52 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2A SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 15 SURFACE ELEVATION: 26±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GS GM GP GM SM SP SM 37 Medium dense, brown, silty, sandy, fine GRAVEL with rootletes, moist. (FILL) Dense, dark gray, sandy GRAVEL with asphalt fragments or grindings, moist. Medium dense, brown, silty, sandy, fine GRAVEL, moist. Medium dense, dark gray, silty fine SAND and fine sandy SILT, with scattered wood, fine organics, wood, and gravel, moist. Loose, dark gray, interlayered, fine to medium SAND with silt and silty sand, with scattered wood and organics, moist to wet. Becomes wet at 6.3 feet bgs. (ALLUVIUM) Test pit was terminated at 7.5 feet below ground surface. Groundwater seepage was observed at 6.3 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 4 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-53 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2B SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 25±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-14 GM ML SM SM SM Loose, brown, silty, sandy, fine to coarse GRAVEL with rootlets, moist. (FILL) Stiff, olive gray and yellow brown, fine sandy SILT, moist. Loose to medium dense, brown, silty, fine to medium SAND, moist. Loose to medium dense, olive gray, silty, fine to medium SAND, moist to wet. (ALLUVIUM) Loose, gray, silty, fine to medium SAND, wet. Test pit was terminated at 9 feet below ground surface. Slow groundwater seepage was observed at 5.3 feet below ground surface. Groundwater seepage and intrusion into test pit was observed at 9 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 5 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-54 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2B SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 15 SURFACE ELEVATION: 25±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GS GM SM SM ML SP SM 14 Dense, brown, silty, sandy, fine rounded GRAVEL with scattered cobbles, moist. (FILL) Dense, gray, silty, gravelly SAND, moist. Glacial till like texture. Medium dense, gray, silty SAND with gravel and scattered organics, moist. Stiff, dark grayish brown, fine sandy SILT, moist. Loose, gray, interlayered SAND with silt and silty sand with decomposing wood, moist to wet. Becomes wet at 5.3 feet bgs. (ALLUVIUM) Test pit was terminated at 6 feet below ground surface. Groundwater seepage was observed at 5.3 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 6 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-55 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2B SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 24±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GM SM SP SM ML SM Loose, brown, organic, SAND with silt, gravel and rootlets, moist. (TOPSOIL) Medium dense, brown, silty, sandy, fine rounded GRAVEL, moist. (FILL) Dense, brown, silty, fine to medium SAND with gravel, moist. Loose to medium dense, gray, interlayered SAND with silt and silty fine sand with roots, moist. Soft, olive brown and olive gray, organic, fine sandy SILT, moist. (ALLUVIUM) Loose, gray, silty, fine to medium SAND with scattered fine organics, moist to wet. Test pit was terminated at 10 feet below ground surface. No groundwater seepage was observed during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 7 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-56 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2B SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 15 SURFACE ELEVATION: 23±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GS GM SM ML SP SM SM 24 Medium dense, brown, silty, sandy, fine rounded GRAVEL, moist. (FILL) Dense, brown and gray mottled, silty SAND with gravel, moist. Stiff, dark grayish brown and gray, fine sandy SILT with scattered gravel, moist. Medium dense, brown, medium SAND with silt and gravel, moist. Loose, gray, interlayered, very silty fine SAND and sandy silt with scattered organics, moist to wet. Becomes wet at 5.2 feet bgs. (ALLUVIUM) Test pit was terminated at 5.5 feet below ground surface. Groundwater seepage was observed at 5.2 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 8 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-57 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2C SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 23±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 SM ML SP SM SM SP SM Loose, brown, organics, SAND with silt, gravel, and rootlets, moist. (TOPSOIL) 0.75 inches Asphalt. Hard, black, asphalted GRAVEL, moist. (ASPHALT) Loose, brown, silty SAND with scattered gravel, moist. (FILL) Stiff, olive gray and yellow brown mottled, fine sandy SILT, moist. Medium dense, yellow brown and gray mottled, SAND with silt, moist. Loose, gray, silty, fine to medium SAND, moist to wet. (ALLUVIUM) Loose, gray, SAND with silt and scattered decomposing wood fragments, wet. Test pit was terminated at 5.7 feet below ground surface. Groundwater seepage was observed at 5.25 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP- 9 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-58 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2C SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 23±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 S-2 GS GM GP SM GP GM 3 Loose, brown, silty, sandy, GRAVEL with rootlets, moist. (FILL) Medium dense, brown, sandy, poorly graded GRAVEL with cobbles, moist. (GRAVEL BORROW FILL) Medium dense, brown, silty SAND with gravel, moist. (FILL) Medium dense, gray, sandy, fine GRAVEL with silt, moist to wet. (ALLUVIUM) Test pit was terminated at 5 feet below ground surface. Groundwater seepage was observed at 4.8 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-10 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-59 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/11/23 LOCATION: See Figure 2C SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 23±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GM GP GM SM GP GM Loose, brown, organic, silty SAND with gravel and rootlets, moist. (TOPSOIL) 0.5 inches Asphalt. Hard, black, asphalted GRAVEL, moist. (ASPHALT) Dense, brown, silty, sandy, rounded GRAVEL, moist. (FILL) Medium dense, brown, sandy, fine GRAVEL with silt, moist. Scattered coarse gravel. (GRAVEL BORROW FILL) Medium dense, brown and gray mottled, silty SAND with gravel, moist. (FILL) Loose to medium dense, dark gray, sandy GRAVEL with silt, moist. (GRAVEL BORROW FILL) Test pit was terminated at 5.9 feet below ground surface. Groundwater seepage was observed at 5.6 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-11 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-60 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/12/23 LOCATION: See Figure 2C SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 23±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 S-2 GS GM GP SM SP SM 8 Loose, brown, silty, sandy, round GRAVEL with rootlets, moist. (FILL) 1 inch Asphalt. Hard, black, asphalted GRAVEL, moist. (ASPHALT) Medium dense, brown and gray, sandy, fine GRAVEL with scattered coarse gravel, moist. (GRAVEL BORROW FILL) Medium dense to dense, olive brown, silty SAND with gravel, moist. (FILL) Loose, dark gray, SAND with silt and scattered gravel, moist to wet. Becomes wet at 5.3 feet bgs. (ALLUVIUM) Test pit was terminated at 5.5 feet below ground surface. Groundwater seepage was observed at 5.3 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-12 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-61 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/12/23 LOCATION: See Figure 2C SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 23±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GP GM SM GP GM Loose, brown, organic, SAND with silt and gravel, moist. (TOPSOIL) Medium dense, brown, sandy, fine GRAVEL with silt, moist. (GRAVEL BORROW FILL) Very dense, gray, silty SAND with gravel and scattered cobbles, moist. Glacial till like texture. (GRAVEL BORROW FILL) Loose, dark gray, medium to coarse sandy, GRAVEL with silt, wet. Thin silty GRAVEL interlayers. (ALLUVIUM) Test pit was terminated at 5.7 feet below ground surface. Groundwater seepage was observed at 5.2 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-13 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-62 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/12/23 LOCATION: See Figure 2D SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 21±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GS GP GM GP GM SM SP SM 6 Loose, brown, organic, SAND with silt and gravel, moist. (TOPSOIL) Medium dense, brown, sandy, fine GRAVEL with silt, moist. (GRAVEL BORROW FILL) 1 inch Asphalt. Hard, black, asphalted GRAVEL, moist. (ASPHALT) Medium dense to dense, brown, sandy, GRAVEL with silt and scattered cobbles, moist. (GRAVEL BORROW FILL) Very dense, dark gray, silty SAND with gravel and cobbles, moist. Glacial till like texture. (FILL) Loose, dark gray, fine to medium SAND with silt, wet. (ALLUVIUM) Test pit was terminated at 7 feet below ground surface. Groundwater seepage was observed at 6.3 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-14 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-63 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/12/23 LOCATION: See Figure 2D SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 20±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R GM GM SM SM SP SM Medium dense, brown, silty, sandy, fine GRAVEL with rootlets, moist. (FILL) 1 inch Asphalt. Hard, black, asphalted GRAVEL, moist. (ASPHALT) Medium dense, brown, silty, sandy, fine to coarse GRAVEL with scattered cobbles, moist. (FILL) Dense, yellow brown and gray mottled, silty SAND with gravel and scattered cobbles, moist. Dense, olive brown, silty SAND with fine to coarse GRAVEL, moist. Loose, dark gray, fine to coarse SAND with silt, wet. (ALLUVIUM) Test pit was terminated at 6.4 feet below ground surface. Groundwater seepage was observed at 5.9 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-15 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-64 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/12/23 LOCATION: See Figure 2D SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 20±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GS SM SM SP SM 8 Loose, brown, organic, SAND with silt and gravel, moist. (TOPSOIL) Dense, olive brown and gray mottled, silty SAND with gravel and scattered cobbles, moist. (FILL) Dense, gray, silty SAND with gravel and scattered cobbles, moist. Glacial till like texture. Loose, dark gray, medium to coarse SAND with silt and gravel, wet. (ALLUVIUM) Test pit was terminated at 5.25 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-16 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-65 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/12/23 LOCATION: See Figure 2D SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 22±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R S-1 GS, CBR, MD SM GM GW 6 Loose, brown, silty, gravelly SAND with organics, moist. (FILL) Loose to medium dense, brown, silty, sandy, GRAVEL with rootlets, moist. Medium dense, olive gray, sandy, well graded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Test pit was terminated at 3.5 feet below ground surface. No groundwater seepage was observed during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-17 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-66 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E60 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 12/11/23 LOCATION: See Figure 2D SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 23±feet DESCRIPTION TEST PIT PHOTO South GR O U N D W A T E R S-1 GS, CBR, MD GP GM GP GM SM SP SM SP SM 12 Loose to medium dense, olibe brown, sandy, fine, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Medium dense, olive gray, sandy, fine, rounded GRAVEL with silt, moist. Dense, olive brown and yellow brown, silty SAND with gravel and cobbles, moist. (FILL) Medium dense, brown to dark grayish brown, fine gravelly, SAND with silt and cobbles, moist. Loose, brown and gray, laminated, SAND with silt, wet. (ALLUVIUM) Test pit was terminated at 5 feet below ground surface. Groundwater seepage was observed at 4.6 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-18 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-67 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E60 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 12/11/23 LOCATION: See Figure 2C SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 24±feet DESCRIPTION TEST PIT PHOTO South GR O U N D W A T E R S-1 GS, CBR, MD GP GM SM SM 18 Medium dense, brown, sandy, fine, crushed and rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) Medium dense, gray, silty SAND with gravel, moist. (FILL) Loose to medium dense, gray, silty SAND with medium sand, rootlets, and scattered gravel, moist. (ALLUVIUM) Test pit was terminated at 5 feet below ground surface. No groundwater seepage was observed during the exploration. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-19 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-68 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E60 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 12/11/23 LOCATION: See Figure 2C SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 25±feet DESCRIPTION TEST PIT PHOTO South GR O U N D W A T E R S-1 GS, CBR, MD GM GP GM ML 25 Medium dense, brown, silty, sandy, rounded GRAVEL with rootlets, moist. (FILL) 2 inches Hot Mix Asphalt. (HMA) Medium dense, brown, sandy, rounded GRAVEL with silt, moist to wet. (GRAVEL BORROW FILL) Stiff, gray, sandy SILT with gravel, moist. (FILL) Test pit was terminated at 5 feet below ground surface. Slow groundwater seepage was observed in the gravel borrow fill at 1.6 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-20 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-69 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E60 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 12/11/23 LOCATION: See Figure 2B SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 24±feet DESCRIPTION TEST PIT PHOTO South GR O U N D W A T E R S-1 GS, CBR, MD GP GM GP GM ML 39 Loose, brown, sandy, fine, crushed and rounded GRAVEL with silt, moist to wet. (GRAVEL BORROW FILL) 1 inch Hot Mix Asphalt. (HMA) Medium dense to dense, brown and gray, sandy, rounded GRAVEL with silt and scattered cobbles, wet. (GRAVEL BORROW FILL) Stiff, dark gray, fine sandy SILT with rootlets, moist. (FILL) Test pit was terminated at 4.7 feet below ground surface. Slow groundwater seepage was observed in the gravel borrow fill at 1.9 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-21 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-70 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E60 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 12/11/23 LOCATION: See Figure 2B SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 24±feet DESCRIPTION TEST PIT PHOTO South GR O U N D W A T E R S-1 GS, CBR, MD GP GM GM GP GM SM SM 21 Loose to medium dense, brown, sandy, fine, rounded GRAVEL with silt, moist. (GRAVEL BORROW FILL) 1 inch Hot Mix Asphalt. (HMA) Dense, olive brown, silty, sandy, GRAVEL, moist. (FILL) 1 inch Hot Mix Asphalt. (HMA) Medium dense, brown, sandy, rounded GRAVEL with silt, wet. (GRAVEL BORROW FILL) Medium dense, dark grayish brown, silty SAND with wood and scattered gravel, moist. (FILL) Loose, dark grayish brown, silty SAND with wood, fine organics, and scattered gravel, moist. Test pit was terminated at 5.3 feet below ground surface. Slow groundwater seepage was observed in gravel borrow fill at 2 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 4/26/24 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 TP-22 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-71 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E60 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 12/11/23 LOCATION: See Figure 2A SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 26±feet DESCRIPTION TEST PIT PHOTO South GR O U N D W A T E R S-1 S-2 GP GM SM SM SP Loose, brown, SAND with silt and organics, moist. (TOPSOIL) Loose, olive brown, sandy, fine, crushed GRAVEL with silt, moist. (FILL) 1.5 inches Hot Mix Aspalt. (HMA) Medium dense, brown, sandy, fine GRAVEL with silt, moist. Orange brown mottling at base of gravel. (GRAVEL BORROW FILL) Medium dense, dark brown, organic, silty SAND with gravel and charcoal, moist. (FILL) Medium dense, olive gray and brown, silty SAND with gravel, charcoal, rubbish, and wood, moist. Loose, dark gray, poorly graded SAND, wet. (ALLUVIUM) Test pit was terminated at 6.75 feet below ground surface. Groundwater seepage was observed at 4.75 feet below ground surface. Taxiway A Rehabilitation/Reconstruction & Renton, Washington 2023-027 FIGURE: SMART TP W/ GROUNDWATER 2023-027.GPJ 12/13/23 Renton Municipal Airport Associated Improvements - Phase 1 Predesign PAGE: 1 of 1 PIT- 1 LOG OF TEST PIT PROJECT NO.: and therefore may not necessarily be indicative of other times and/or locations. NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated A-72 EXCAVATION COMPANY: NW Excavating EXCAVATING EQUIPMENT: Bobcat E50 Mini Excavator SA M P L E N U M B E R LOGGED BY: S. Pemble DATE COMPLETED: 9/14/23 LOCATION: See Figure 2B SY M B O L OT H E R T E S T S US C S S O I L C L A S S MO I S T U E C O N T E N T ( % ) SA M P L E T Y P E DE P T H ( f e e t ) 0 5 10 SURFACE ELEVATION: 24±feet DESCRIPTION TEST PIT PHOTO East GR O U N D W A T E R 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Appendix B Laboratory Test Results B- 1,S-1 2.0 3.0 2.5 63.7 32.2 4.2 GW Very dark grayish-brown, well-graded GRAVEL with sand B- 1,S-2 3.0 4.0 8.2 69.2 19.7 11.2 GP-GM Dark grayish-brown, poorly graded GRAVEL with silt and sand B- 1,S-3 4.0 5.0 13.9 4.8 58.8 36.4 SM Dark gray, silty SAND B- 2,S-1 2.0 3.0 10.5 6.1 60.7 33.1 SM Dark gray, silty SAND B- 2,S-2 4.0 5.0 13.5 7.4 59.5 33.1 SM Very dark gray, silty SAND B- 2,S-3 5.0 6.5 10.2 6.8 56.4 36.8 SM Very dark gray, silty SAND B- 3,S-1 4.0 5.0 8.8 23.8 48.9 27.3 SM Very dark gray, silty SAND with gravel B- 3,S-3 9.0 10.0 14.5 18.8 54.1 27.1 SM Olive, silty SAND with gravel B- 4,S-1 1.0 1.5 4.2 0.0 58.4 35.8 5.9 GP-GM Very dark gray, poorly graded GRAVEL with silt and sand B- 4,S-3 4.0 5.0 34.1 15.9 84.1 ML Dark olive-gray, SILT with sand B- 4,S-5 7.0 7.5 35.2 0.1 36.1 63.7 ML Dark olive-gray, sandy SILT B- 5,S-1 2.0 3.0 2.4 57.7 38.0 4.3 GP Very dark gray, poorly graded GRAVEL with sand B- 5,S-2 3.0 4.0 30.8 27.8 72.2 ML Dark olive-gray, SILT with sand B- 5,S-3 5.0 6.5 24.9 10.3 86.4 3.3 SP Very dark gray, poorly graded SAND B- 6,S-1 5.0 6.5 27.9 0.9 36.1 63.0 ML Very dark grayish-brown, sandy SILT B- 6,S-2 10.0 11.5 41.9 8.6 40.2 51.2 ML Dark olive-gray, sandy SILT B- 7,S-1 5.0 6.5 39.6 1.5 59.9 38.6 SM Dark gray, silty SAND with organics B- 8,S-1 1.0 1.8 3.6 54.5 38.6 6.8 GP-GM Dark grayish-brown, poorly graded GRAVEL with silt and sand B- 8,S-2 4.0 5.0 138.9 4.6 95.4 OL Dark olive-brown, organic SILT B- 8,S-3 5.0 6.5 20.3 ML Dark grayish-brown, SILT (f e e t ) SUMMARY OF BO T T O M D E P T H (f e e t ) Notes: TO P D E P T H MO I S T U R E CO N T E N T ( % ) LIMITS (%) ATTERBERG % C O B B L E S EX P L O R A T I O N DE S I G N A T I O N 1. This table summarizes information presented elsewhere in the report and should be used in conjunction with the report text, other graphs and tables, and the exploration logs. 2. The soil classifications in this table are based on ASTM D2487 and D2488 as applicable. MATERIAL PROPERTIES B-1 PAGE: 1 of 4 PL PILL % G R A V E L % S A N D % F I N E S AS T M S O I L SAMPLE DESCRIPTIONCL A S S I F I C A T I O N 2023-027PROJECT NO.: INDEX MASTUM 4 WITH COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington B- 8,S-4 10.0 11.5 66.0 ML Dark olive-gray, SILT B- 9,S-1 5.0 6.5 37.2 1.0 62.4 36.6 SM Very dark gray, silty SAND B- 9,S-2 10.0 11.5 51.0 0.3 50.7 49.0 SM Dark olive-brown, silty SAND B-10,S-1 4.0 5.0 12.4 0.7 89.2 10.1 SP-SM Olive, poorly graded SAND with silt B-10,S-2 5.0 6.5 95.3 14.7 85.3 ML Olive, SILT with organics B-11,S-1 5.0 6.5 14.8 22.2 64.3 13.5 SM Dark gray, silty SAND with gravel B-11,S-2 10.0 11.5 36.7 2.1 58.5 39.4 SM Dark olive-gray, silty SAND B-12,S-1 2.0 2.5 21.2 4.6 48.5 46.9 SM Dark olive-gray, silty SAND B-12,S-2 5.0 6.5 28.2 1.0 86.8 12.2 SM Dark olive-gray, silty SAND B-13,S-1 5.0 6.5 6.2 41.0 47.8 11.1 SP-SM Very dark gray, poorly graded SAND with silt and gravel B-13,S-2 10.0 11.5 19.0 27.0 59.9 13.1 SM Very dark gray, silty SAND with gravel B-14,S-2 5.5 6.5 2.1 0.0 83.5 16.3 0.2 GW Very dark gray, well-graded GRAVEL with sand B-14,S-3 8.5 9.5 5.5 0.0 65.6 33.5 0.9 GW Very dark gray, well-graded GRAVEL with sand B-15,S-1 1.0 2.0 7.2 33.8 43.7 22.5 SM Very dark gray, silty SAND with gravel B-15,S-2 4.5 5.0 5.9 0.0 72.1 25.7 2.1 GP Very dark gray, poorly graded GRAVEL with sand B-15,S-3 5.0 6.5 18.3 SM Very dark gray, silty SAND with gravel B-15,S-4 10.0 11.5 36.8 SM Very dark grayish-brown, silty SAND B-16,S-1 3.0 4.0 14.0 8.5 48.8 42.7 SM Very dark gray, silty SAND B-16,S-2 5.0 6.5 6.9 39.0 47.0 14.1 SM Very dark gray, silty SAND with gravel B-16,S-4 10.0 11.5 20.8 27.8 64.2 8.0 SP-SM Very dark gray, poorly graded SAND with silt and gravel (f e e t ) SUMMARY OF BO T T O M D E P T H (f e e t ) Notes: TO P D E P T H MO I S T U R E CO N T E N T ( % ) LIMITS (%) ATTERBERG % C O B B L E S EX P L O R A T I O N DE S I G N A T I O N 1. This table summarizes information presented elsewhere in the report and should be used in conjunction with the report text, other graphs and tables, and the exploration logs. 2. The soil classifications in this table are based on ASTM D2487 and D2488 as applicable. MATERIAL PROPERTIES B-2 PAGE: 2 of 4 PL PILL % G R A V E L % S A N D % F I N E S AS T M S O I L SAMPLE DESCRIPTIONCL A S S I F I C A T I O N 2023-027PROJECT NO.: INDEX MASTUM 4 WITH COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington B-18,S-2 9.0 10.0 41.4 48 25 23 82.2 CL Dark olive-brown, lean CLAY with sand B-19,S-1 5.0 6.5 24.6 1.3 43.6 55.1 ML Very dark gray, sandy SILT B-19,S-2 8.3 8.5 43.4 25.8 74.2 ML Very dark grayish-brown, SILT with sand B-20,S-1 3.0 4.0 3.7 59.3 35.8 4.9 GP Dark yellowish-brown, poorly graded GRAVEL with sand B-20,S-2 5.0 6.5 9.8 29.2 60.1 10.6 SP-SM Very dark gray, poorly graded SAND with silt and gravel B-20,S-3 7.0 8.0 12.5 0.0 37.0 61.7 1.3 SP Very dark gray, poorly graded SAND with gravel B-21,S-1 3.0 4.0 3.5 59.0 36.7 4.4 GW Dark yellowish-brown, well-graded GRAVEL with sand B-21,S-3 8.0 9.0 111.2 109 69 40 72.5 OH Very dark gray, organic SILT with sand B-22,S-1 1.0 2.0 3.2 0.0 81.1 15.4 3.5 GP Dark yellowish-brown, poorly graded GRAVEL with sand B-22,S-2 3.0 4.0 52.9 39.9 60.1 ML Very dark grayish-brown, sandy SILT B-22,S-3 5.0 6.5 34.5 47.7 52.3 ML Very dark gray, sandy SILT B-23,S-1 3.0 4.0 38.0 20.3 79.7 ML Very dark gray, SILT with sand B-23,S-2 5.0 6.5 35.5 67.8 32.2 SM Very dark gray, silty SAND B-24,S-1 1.7 3.0 6.7 0.0 55.7 24.4 19.8 GM Very dark gray, silty GRAVEL with sand B-24,S-2 4.0 5.0 29.8 0.3 28.9 70.7 ML Very dark gray, SILT with sand B-24,S-4 7.5 9.0 50.1 0.1 32.4 67.5 ML Very dark gray, sandy SILT with organics B-25,S-1 1.0 2.0 3.6 71.7 24.0 4.3 GP Very dark brown, poorly graded GRAVEL with sand B-25,S-2 4.0 5.0 33.0 42.3 57.7 ML Very dark gray, sandy SILT B-25,S-4 9.0 10.0 13.8 14.5 85.0 0.5 SP Very dark gray, poorly graded SAND Core-15,S-2 1.0 1.3 19.0 31 17 14 2.0 37.4 60.6 CL Very dark gray, sandy lean CLAY (f e e t ) SUMMARY OF BO T T O M D E P T H (f e e t ) Notes: TO P D E P T H MO I S T U R E CO N T E N T ( % ) LIMITS (%) ATTERBERG % C O B B L E S EX P L O R A T I O N DE S I G N A T I O N 1. This table summarizes information presented elsewhere in the report and should be used in conjunction with the report text, other graphs and tables, and the exploration logs. 2. The soil classifications in this table are based on ASTM D2487 and D2488 as applicable. MATERIAL PROPERTIES B-3 PAGE: 3 of 4 PL PILL % G R A V E L % S A N D % F I N E S AS T M S O I L SAMPLE DESCRIPTIONCL A S S I F I C A T I O N 2023-027PROJECT NO.: INDEX MASTUM 4 WITH COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington TP- 1,S-1 1.4 2.0 7.7 0.0 13.5 67.5 19.0 SM Dark yellowish-brown, silty SAND TP- 3,S-1 1.5 2.0 21.0 1.3 26.9 71.9 ML Yellowish-brown, SILT with sand TP- 4,S-1 1.8 2.1 37.3 0.0 15.9 38.1 46.0 SM Very dark brown, silty SAND with gravel TP- 6,S-1 1.4 2.0 13.7 0.0 20.4 41.2 38.4 SM Dark grayish-brown, silty SAND with gravel TP- 8,S-1 1.5 2.0 24.3 0.0 17.8 24.1 58.1 ML Dark grayish-brown, sandy SILT with gravel TP-10,S-1 0.7 1.0 2.5 6.6 45.1 44.6 3.7 GP Yellowish-brown, poorly graded GRAVEL with sand and cobbles TP-12,S-1 1.0 1.5 7.9 13.9 65.8 20.3 SM Very dark grayish-brown, silty SAND TP-14,S-1 1.5 1.8 5.8 0.0 53.9 39.0 7.1 GP-GM Dark brown, poorly graded GRAVEL with silt and sand TP-16,S-1 0.7 1.2 8.4 5.3 9.3 43.6 41.8 SM Olive-brown, silty SAND with cobbles TP-17,S-1 1.3 2.0 5.9 0.0 62.5 33.7 3.8 GW Dark brown, well-graded GRAVEL with sand TP-18,S-1 1.0 1.7 12.2 33.2 37.9 28.9 SM Dark yellowish-brown, silty SAND with gravel TP-19,S-1 1.5 2.0 17.9 31.1 37.4 31.4 SM Very dark gray, silty SAND with gravel TP-20,S-1 2.0 2.6 25.1 13.4 33.2 53.4 ML Dark brown, sandy SILT TP-21,S-1 2.0 2.5 39.0 6.0 13.3 80.7 ML Olive-brown, SILT with sand TP-22,S-1 2.3 2.5 21.2 8.2 44.8 47.0 SM Very dark brown, silty SAND (f e e t ) SUMMARY OF BO T T O M D E P T H (f e e t ) Notes: TO P D E P T H MO I S T U R E CO N T E N T ( % ) LIMITS (%) ATTERBERG % C O B B L E S EX P L O R A T I O N DE S I G N A T I O N 1. This table summarizes information presented elsewhere in the report and should be used in conjunction with the report text, other graphs and tables, and the exploration logs. 2. The soil classifications in this table are based on ASTM D2487 and D2488 as applicable. MATERIAL PROPERTIES B-4 PAGE: 4 of 4 PL PILL % G R A V E L % S A N D % F I N E S AS T M S O I L SAMPLE DESCRIPTIONCL A S S I F I C A T I O N 2023-027PROJECT NO.: INDEX MASTUM 4 WITH COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-2 S-3 2.0 - 3.0 3.0 - 4.0 4.0 - 5.0 #10 32.2 19.7 58.8 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-5 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 63.7 69.2 4.8 Sand % (GW) Very dark grayish-brown, well-graded GRAVEL with sand (GP-GM) Dark grayish-brown, poorly graded GRAVEL with silt and sand (SM) Dark gray, silty SAND Fines % 0.00050.005 CLAY B- 1 B- 1 B- 1 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 2 8 14 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 4.2 11.2 36.4 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-2 S-3 2.0 - 3.0 4.0 - 5.0 5.0 - 6.5 #10 60.7 59.5 56.4 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-6 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 6.1 7.4 6.8 Sand % (SM) Dark gray, silty SAND (SM) Very dark gray, silty SAND (SM) Very dark gray, silty SAND Fines % 0.00050.005 CLAY B- 2 B- 2 B- 2 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 11 14 10 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 33.1 33.1 36.8 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-3 S-1 4.0 - 5.0 9.0 - 10.0 1.0 - 1.5 #10 48.9 54.1 35.8 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-7 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 23.8 18.8 58.4 Sand % (SM) Very dark gray, silty SAND with gravel (SM) Olive, silty SAND with gravel (GP-GM) Very dark gray, poorly graded GRAVEL with silt and sand Fines % 0.00050.005 CLAY B- 3 B- 3 B- 4 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 9 15 4 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 27.3 27.1 5.9 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-3 S-5 S-1 4.0 - 5.0 7.0 - 7.5 2.0 - 3.0 #10 15.9 36.1 38.0 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-8 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 0.1 57.7 Sand % (ML) Dark olive-gray, SILT with sand (ML) Dark olive-gray, sandy SILT (GP) Very dark gray, poorly graded GRAVEL with sand Fines % 0.00050.005 CLAY B- 4 B- 4 B- 5 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 34 35 2 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 84.1 63.7 4.3 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-2 S-3 S-1 3.0 - 4.0 5.0 - 6.5 5.0 - 6.5 #10 27.8 86.4 36.1 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-9 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 10.3 0.9 Sand % (ML) Dark olive-gray, SILT with sand (SP) Very dark gray, poorly graded SAND (ML) Very dark grayish-brown, sandy SILT Fines % 0.00050.005 CLAY B- 5 B- 5 B- 6 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 31 25 28 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 72.2 3.3 63.0 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-2 S-1 S-1 10.0 - 11.5 5.0 - 6.5 1.0 - 1.8 #10 40.2 59.9 38.6 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-10 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 8.6 1.5 54.5 Sand % (ML) Dark olive-gray, sandy SILT (SM) Dark gray, silty SAND with organics (GP-GM) Dark grayish-brown, poorly graded GRAVEL with silt and sand Fines % 0.00050.005 CLAY B- 6 B- 7 B- 8 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 42 40 4 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 51.2 38.6 6.8 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-2 S-1 S-2 4.0 - 5.0 5.0 - 6.5 10.0 - 11.5 #10 4.6 62.4 50.7 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-11 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 1.0 0.3 Sand % (OL) Dark olive-brown, organic SILT (SM) Very dark gray, silty SAND (SM) Dark olive-brown, silty SAND Fines % 0.00050.005 CLAY B- 8 B- 9 B- 9 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 139 37 51 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 95.4 36.6 49.0 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-2 S-1 4.0 - 5.0 5.0 - 6.5 5.0 - 6.5 #10 89.2 14.7 64.3 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-12 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 0.7 22.2 Sand % (SP-SM) Olive, poorly graded SAND with silt (ML) Olive, SILT with organics (SM) Dark gray, silty SAND with gravel Fines % 0.00050.005 CLAY B-10 B-10 B-11 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 12 95 15 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 10.1 85.3 13.5 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-2 S-1 S-2 10.0 - 11.5 2.0 - 2.5 5.0 - 6.5 #10 58.5 48.5 86.8 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-13 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 2.1 4.6 1.0 Sand % (SM) Dark olive-gray, silty SAND (SM) Dark olive-gray, silty SAND (SM) Dark olive-gray, silty SAND Fines % 0.00050.005 CLAY B-11 B-12 B-12 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 37 21 28 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 39.4 46.9 12.2 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-2 S-2 5.0 - 6.5 10.0 - 11.5 5.5 - 6.5 #10 47.8 59.9 16.3 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-14 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 41.0 27.0 83.5 Sand % (SP-SM) Very dark gray, poorly graded SAND with silt and gravel (SM) Very dark gray, silty SAND with gravel (GW) Very dark gray, well-graded GRAVEL with sand Fines % 0.00050.005 CLAY B-13 B-13 B-14 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 6 19 2 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 11.1 13.1 0.2 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-3 S-1 S-2 8.5 - 9.5 1.0 - 2.0 4.5 - 5.0 #10 33.5 43.7 25.7 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-15 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 65.6 33.8 72.1 Sand % (GW) Very dark gray, well-graded GRAVEL with sand (SM) Very dark gray, silty SAND with gravel (GP) Very dark gray, poorly graded GRAVEL with sand Fines % 0.00050.005 CLAY B-14 B-15 B-15 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 6 7 6 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 0.9 22.5 2.1 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-2 S-4 3.0 - 4.0 5.0 - 6.5 10.0 - 11.5 #10 48.8 47.0 64.2 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-16 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 8.5 39.0 27.8 Sand % (SM) Very dark gray, silty SAND (SM) Very dark gray, silty SAND with gravel (SP-SM) Very dark gray, poorly graded SAND with silt and gravel Fines % 0.00050.005 CLAY B-16 B-16 B-16 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 14 7 21 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 42.7 14.1 8.0 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-2 S-1 S-2 9.0 - 10.0 5.0 - 6.5 8.3 - 8.5 48 #10 43.6 25.8 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-17 23 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 1.3 Sand % (CL) Dark olive-brown, lean CLAY with sand (ML) Very dark gray, sandy SILT (ML) Very dark grayish-brown, SILT with sand Fines % 0.00050.005 CLAY B-18 B-19 B-19 25 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 41 25 43 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 82.2 55.1 74.2 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-2 S-3 3.0 - 4.0 5.0 - 6.5 7.0 - 8.0 #10 35.8 60.1 61.7 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-18 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 59.3 29.2 37.0 Sand % (GP) Dark yellowish-brown, poorly graded GRAVEL with sand (SP-SM) Very dark gray, poorly graded SAND with silt and gravel (SP) Very dark gray, poorly graded SAND with gravel Fines % 0.00050.005 CLAY B-20 B-20 B-20 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 4 10 12 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 4.9 10.6 1.3 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-1 S-3 S-1 3.0 - 4.0 8.0 - 9.0 1.0 - 2.0 109 #10 36.7 15.4 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-19 40 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 59.0 81.1 Sand % (GW) Dark yellowish-brown, well-graded GRAVEL with sand (OH) Very dark gray, organic SILT with sand (GP) Dark yellowish-brown, poorly graded GRAVEL with sand Fines % 0.00050.005 CLAY B-21 B-21 B-22 69 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 3 111 3 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 4.4 72.5 3.5 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-2 S-3 S-1 3.0 - 4.0 5.0 - 6.5 3.0 - 4.0 #10 39.9 47.7 20.3 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-20 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 Sand % (ML) Very dark grayish-brown, sandy SILT (ML) Very dark gray, sandy SILT (ML) Very dark gray, SILT with sand Fines % 0.00050.005 CLAY B-22 B-22 B-23 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 53 34 38 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 60.1 52.3 79.7 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-2 S-1 S-2 5.0 - 6.5 1.7 - 3.0 4.0 - 5.0 #10 67.8 24.4 28.9 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-21 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 55.7 0.3 Sand % (SM) Very dark gray, silty SAND (GM) Very dark gray, silty GRAVEL with sand (ML) Very dark gray, SILT with sand Fines % 0.00050.005 CLAY B-23 B-24 B-24 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 36 7 30 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 32.2 19.8 70.7 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-4 S-1 S-2 7.5 - 9.0 1.0 - 2.0 4.0 - 5.0 #10 32.4 24.0 42.3 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-22 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 0.1 71.7 Sand % (ML) Very dark gray, sandy SILT with organics (GP) Very dark brown, poorly graded GRAVEL with sand (ML) Very dark gray, sandy SILT Fines % 0.00050.005 CLAY B-24 B-25 B-25 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 50 4 33 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 67.5 4.3 57.7 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110 GRAIN SIZE IN MILLIMETERS 50 SAMPLE S-4 S-2 9.0 - 10.0 1.0 - 1.3 31 #10 85.0 37.4 30 CLASSIFICATION OF SOIL- ASTM D2487 Group Symbol and Name U.S. STANDARD SIEVE SIZES SAND B-23 14 Coarse #60#40#20 Fine Coarse SYMBOL Gravel % 3"1-1/2" PE R C E N T F I N E R B Y W E I G H T #4 #200 14.5 2.0 Sand % (SP) Very dark gray, poorly graded SAND (CL) Very dark gray, sandy lean CLAY Fines % 0.00050.005 CLAY B-25 Core-15 17 SILT 3/4" GRAVEL 0.05 5/8" 70 #100 0.5 14 19 50 Medium Fine 3/8" 5 PI 90 10 % MC LL PLDEPTH ( ft.) PARTICLE-SIZE ANALYSIS OF SOILS METHOD ASTM D6913 0.5 60.6 2023-027PROJECT NO.: HWAGRSZ 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110100 0.0005 10 30 B-24 PARTICLE-SIZE ANALYSIS OF SOILS METHODS ASTM D6913/D7928 GRAVEL SAND 3/4" 50 70 90 Fine 0.005 1.4 - 2.0 1.5 - 2.0 1.8 - 2.1 CLASSIFICATION SILT SYMBOL SAMPLE Coarse 8 21 37 CLAY (SM) Dark yellowish-brown, silty SAND (ML) Yellowish-brown, SILT with sand (SM) Very dark brown, silty SAND with gravel TP- 1 TP- 3 TP- 4 DEPTH (ft) COBBLES 3" 1-1/2" #4 #10 #20 #40 #60 #100 % Cobble % Gravel 13.5 1.3 15.9 67.5 26.9 38.1 U.S. STANDARD SIEVE SIZES GRAIN SIZE IN MILLIMETERS PE R C E N T F I N E R B Y W E I G H T 0.05 12" 6"5/8" 3/8"#200 50 5 0.5 Coarse Medium Fine S-1 S-1 S-1 % MC % Sand % Fines 2.9 7.2 4.8 16.1 64.7 41.2 % Silt % Clay 0.0 0.0 2023-027PROJECT NO.: HWAGRSZ3_COMBINED W/COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110100 0.0005 10 30 B-25 PARTICLE-SIZE ANALYSIS OF SOILS METHODS ASTM D6913/D7928 GRAVEL SAND 3/4" 50 70 90 Fine 0.005 1.4 - 2.0 1.5 - 2.0 0.7 - 1.0 CLASSIFICATION SILT SYMBOL SAMPLE Coarse 14 24 3 CLAY (SM) Dark grayish-brown, silty SAND with gravel (ML) Dark grayish-brown, sandy SILT with gravel (GP) Yellowish-brown, poorly graded GRAVEL with sand and cobbles TP- 6 TP- 8 TP-10 DEPTH (ft) COBBLES 3" 1-1/2" #4 #10 #20 #40 #60 #100 % Cobble % Gravel 20.4 17.8 45.1 41.2 24.1 44.6 U.S. STANDARD SIEVE SIZES GRAIN SIZE IN MILLIMETERS PE R C E N T F I N E R B Y W E I G H T 0.05 12" 6"5/8" 3/8"#200 50 5 0.5 Coarse Medium Fine S-1 S-1 S-1 % MC % Sand % Fines 4.6 13.4 0.5 33.8 44.6 3.2 % Silt % Clay 0.0 0.0 6.6 2023-027PROJECT NO.: HWAGRSZ3_COMBINED W/COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110100 0.0005 10 30 B-26 PARTICLE-SIZE ANALYSIS OF SOILS METHODS ASTM D6913/D7928 GRAVEL SAND 3/4" 50 70 90 Fine 0.005 1.0 - 1.5 1.5 - 1.8 0.7 - 1.2 CLASSIFICATION SILT SYMBOL SAMPLE Coarse 8 6 8 CLAY (SM) Very dark grayish-brown, silty SAND (GP-GM) Dark brown, poorly graded GRAVEL with silt and sand (SM) Olive-brown, silty SAND with cobbles TP-12 TP-14 TP-16 DEPTH (ft) COBBLES 3" 1-1/2" #4 #10 #20 #40 #60 #100 % Cobble % Gravel 13.9 53.9 9.3 65.8 39.0 43.6 U.S. STANDARD SIEVE SIZES GRAIN SIZE IN MILLIMETERS PE R C E N T F I N E R B Y W E I G H T 0.05 12" 6"5/8" 3/8"#200 50 5 0.5 Coarse Medium Fine S-1 S-1 S-1 % MC % Sand % Fines 2.5 1.6 4.1 17.7 5.5 37.7 % Silt % Clay 0.0 5.3 2023-027PROJECT NO.: HWAGRSZ3_COMBINED W/COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110100 0.0005 10 30 B-27 PARTICLE-SIZE ANALYSIS OF SOILS METHODS ASTM D6913/D7928 GRAVEL SAND 3/4" 50 70 90 Fine 0.005 1.3 - 2.0 1.0 - 1.7 1.5 - 2.0 CLASSIFICATION SILT SYMBOL SAMPLE Coarse 6 12 18 CLAY (GW) Dark brown, well-graded GRAVEL with sand (SM) Dark yellowish-brown, silty SAND with gravel (SM) Very dark gray, silty SAND with gravel TP-17 TP-18 TP-19 DEPTH (ft) COBBLES 3" 1-1/2" #4 #10 #20 #40 #60 #100 % Cobble % Gravel 62.5 33.2 31.1 33.7 37.9 37.4 U.S. STANDARD SIEVE SIZES GRAIN SIZE IN MILLIMETERS PE R C E N T F I N E R B Y W E I G H T 0.05 12" 6"5/8" 3/8"#200 50 5 0.5 Coarse Medium Fine S-1 S-1 S-1 % MC % Sand % Fines 0.4 3.6 3.1 3.4 25.2 28.4 % Silt % Clay 0.0 2023-027PROJECT NO.: HWAGRSZ3_COMBINED W/COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110100 0.0005 10 30 B-28 PARTICLE-SIZE ANALYSIS OF SOILS METHODS ASTM D6913/D7928 GRAVEL SAND 3/4" 50 70 90 Fine 0.005 2.0 - 2.6 2.0 - 2.5 2.3 - 2.5 CLASSIFICATION SILT SYMBOL SAMPLE Coarse 25 39 21 CLAY (ML) Dark brown, sandy SILT (ML) Olive-brown, SILT with sand (SM) Very dark brown, silty SAND TP-20 TP-21 TP-22 DEPTH (ft) COBBLES 3" 1-1/2" #4 #10 #20 #40 #60 #100 % Cobble % Gravel 13.4 6.0 8.2 33.2 13.3 44.8 U.S. STANDARD SIEVE SIZES GRAIN SIZE IN MILLIMETERS PE R C E N T F I N E R B Y W E I G H T 0.05 12" 6"5/8" 3/8"#200 50 5 0.5 Coarse Medium Fine S-1 S-1 S-1 % MC % Sand % Fines 5.3 10.8 4.6 48.0 70.0 42.4 % Silt % Clay 2023-027PROJECT NO.: HWAGRSZ3_COMBINED W/COBBLES 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 0 10 20 30 40 50 60 0 20 40 60 80 100 % MC LL CL-ML MH SAMPLE PL A S T I C I T Y I N D E X ( P I ) SYMBOL PL PI S-2 S-3 S-2 25 69 17 41 111 19 LIQUID LIMIT, PLASTIC LIMIT AND PLASTICITY INDEX OF SOILS METHOD ASTM D4318 82.2 72.5 60.6 CL (CL) Dark olive-brown, lean CLAY with sand (OH) Very dark gray, organic SILT with sand (CL) Very dark gray, sandy lean CLAY CLASSIFICATION % Fines LIQUID LIMIT (LL) B-18 B-21 Core-15 ML 48 109 31 DEPTH (ft) 23 40 14 CH B-29 9.0 - 10.0 8.0 - 9.0 1.0 - 1.3 2023-027PROJECT NO.: HWAATTB 2023-027.GPJ 2/1/24 FIGURE: Renton Municipal Airport Taxiway A Rehabilitation/Reconstruction & Associated Improvements - Phase 1 Predesign Renton, Washington 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Appendix C Laboratory Test Results Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 17 44 10 14 10 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-1 Depth: 3.6" Sample Number: S-1 Date: Client: Project: Project No:Figure Brown, well-graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 96 83 61 52 39 30 24 18 11 7 5.3 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 21.8488 19.8557 12.3551 8.8179 2.3198 0.4381 0.2470 50.01 1.76 GW-GM Percent Fractured*: 89 Natural Moisture: 5.3% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-1 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 17 53 9 9 7 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-2 Depth: 9" Sample Number: S-1 Date: Client: Project: Project No:Figure Dark grayish-brown, poorly graded GRAVEL with sand 2" 1-1/2" 1-1/4" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 94 83 56 47 30 22 18 14 10 7 4.8 100 95-100 70-95 55-85 30-60 12-30 0-8.0 22.3139 19.7394 13.5747 10.6807 4.7630 0.6659 0.2908 46.68 5.75 GP Percent Fractured*: 92 Natural Moisture: 3.2% *Particles with at least 2 fracutred faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-2 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 17 46 10 12 10 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-3 Depth: 7" Sample Number: S-1 Date: Client: Project: Project No:Figure Dark grayish-brown, poorly graded GRAVEL with silt and sand2" 1-1/2" 1-1/4" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 98 83 64 54 37 29 23 18 13 7 5.1 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 21.4954 19.7960 11.5450 8.2092 2.6619 0.4024 0.2189 52.75 2.80 GP-GM Percent Fractured*: 93 Natural Moisture: 3.4% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-3 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 15 51 8 11 10 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-7 Depth: 13.25" Sample Number: S-1 Date: Client: Project: Project No:Figure Olive-gray, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 85 62 48 34 27 22 18 11 7 5.3 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 20.7014 19.1943 12.2681 10.1339 3.2636 0.4389 0.2500 49.08 3.47 GP-GM Percent Fracured*: 88 Natural Moisture: 4.2% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-4 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 24 37 12 16 6 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-8 Depth: 8" Sample Number: S-1 Date: Client: Project: Project No:Figure Dark gray, well-graded GRAVEL with silt and sand 2" 1-1/2" 1-1/4" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 95 76 59 52 39 29 20 14 9 7 5.0 100 95-100 70-95 55-85 30-60 12-30 0-8.0 23.3008 21.7780 13.2706 8.8200 2.5052 0.6951 0.3382 39.24 1.40 GW-GM Percent Fractured*: 96 Natural Moisture: 2.7% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-5 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 12 46 11 15 11 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-9 Depth: 3" Sample Number: S-1 Date: Client: Project: Project No:Figure Olive-gray, well-graded GRAVEL with sand 2" 1-1/2" 1-1/4" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 97 88 69 59 42 33 26 20 12 7 4.9 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X X 20.2180 17.8865 9.8252 6.7778 1.7880 0.3975 0.2511 39.12 1.30 GW Percent Fractured*: 85 Natural Moisture: 3.6% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-6 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 18 52 8 7 5 10 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-10 Depth: 8" Sample Number: S-1 Date: Client: Project: Project No:Figure Olive, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 82 56 47 30 24 20 16 13 11 9.6 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X X 21.1774 19.9448 13.7934 10.7908 4.6183 0.4442 0.0894 154.37 17.31 GP-GM Percent Fractured*: 95 Natural Moisture 4.0% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-7 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 35 33 11 13 4 4 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-12 Depth: 7" Sample Number: S-1 Date: Client: Project: Project No:Figure Olive, well-graded GRAVEL with sand 2" 1-1/2" 1-1/4" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 82 65 46 41 32 23 15 10 7 5 4.0 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 27.6862 26.4231 17.4334 14.0331 3.9421 1.2082 0.6207 28.09 1.44 GW Percent Fractured*: 92 Natural Moisture: 2.5% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-8 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 16 42 12 15 9 6 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-14 Depth: 7" Sample Number: S-1 Date: Client: Project: Project No:Figure Very dark gray, well-graded GRAVEL with silt and sand 2" 1-1/2" 1-1/4" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 92 84 66 57 42 32 24 18 13 8 5.5 100 95-100 70-95 55-85 30-60 12-30 0-8.0 23.9670 19.4688 10.6419 7.1702 2.0415 0.3981 0.1966 54.13 1.99 GW-GM Percent Fractured*: 99 Natural Moisture: 2.6% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-9 Tested By: KR Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 13 38 15 13 10 11 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-15 Depth: 1" Sample Number: S-1 Date: Client: Project: Project No:Figure Reddish-brown, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 95 87 75 65 49 37 28 23 19 15 11 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X X 20.8443 17.6540 7.7402 4.9358 1.4152 0.1633 GP-GM Percent Fractured*: 99 Natural Moisture: 7.0% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-10 Tested By: KR Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 6 41 15 17 11 10 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-16 Depth: 4" Sample Number: S-1 Date: Client: Project: Project No:Figure Reddish-brown, well-graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 98 94 86 76 53 40 31 24 18 14 10.0 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X X X 15.2888 12.2306 5.9487 4.1127 1.1162 0.1867 0.0750 79.32 2.79 GW-GM Percent Fractured*: 98 Natural Moisture: 7.3% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-11 Tested By: KR Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 17 47 11 11 7 7 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-16 Depth: 6" Sample Number: S-2 Date: Client: Project: Project No:Figure Brown, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 98 83 60 52 36 26 20 16 12 9 6.6 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 21.4043 19.8138 12.8272 8.9328 3.1990 0.4891 0.1919 66.85 4.16 GP-GM Percent Fractured*: 99 Natural Moisture: 4.5% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-12 Tested By: KR Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 15 53 10 9 8 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-18 Depth: 4" Sample Number: S-1 Date: Client: Project: Project No:Figure Gray, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 85 58 48 32 23 18 14 11 8 5.4 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 20.5371 19.0395 13.1792 10.3360 4.2485 0.6795 0.2322 56.75 5.90 GP-GM Percent Fractured*: 99 Natural Moisture: 5.5% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-13 Tested By: KR Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 21 50 10 8 6 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-19 Depth: 4" Sample Number: S-1 Date: Client: Project: Project No:Figure Gray, poorly graded GRAVEL with sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 94 79 54 44 29 21 16 13 10 7 4.9 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 23.1373 21.1409 14.1095 11.4392 5.0802 1.0077 0.3335 42.31 5.49 GP Percent Fractured*: 97 Natural Moisture: 2.5% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-14 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 9 56 10 11 9 5 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-20 Depth: 4" Sample Number: S-1 Date: Client: Project: Project No:Figure Olive-gray, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 91 61 52 35 26 21 16 12 8 5.4 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X X 18.5597 17.2588 12.3826 8.9524 3.4470 0.4766 0.2083 59.44 4.61 GP-GM Percent Fractured*: 99 Natural Moisture: 4.0% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 8/7/2023 C-15 Tested By: KR Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 11 55 11 10 7 6 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-21 Depth: 4" Sample Number: S-1 Date: Client: Project: Project No:Figure Brown, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 96 89 71 56 34 24 19 15 11 8 6.5 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X X 19.9041 17.3532 10.3532 8.1589 3.8076 0.6096 0.2220 46.65 6.31 GP-GM Percent Fractured*: 97 Natural Moisture: 5.4% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-16 Tested By: TS Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 25 40 9 11 9 6 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-22 Depth: 4" Sample Number: S-1 Date: Client: Project: Project No:Figure Brown, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 98 75 60 50 35 27 22 18 13 9 6.3 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X 22.4646 21.3621 12.6680 9.4277 3.2002 0.4056 0.1842 68.79 4.39 GP-GM Percent Fractured*: 95 Natural Moisture: 5.9% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-17 Tested By: KR Checked By: SEG Particle Size Distribution Report PE R C E N T F I N E R 0 10 20 30 40 50 60 70 80 90 100 GRAIN SIZE - mm. 0.1110100 P-209 % +3"Coarse % Gravel Fine Coarse Medium % Sand Fine % Fines 0 9 53 13 12 7 6 6 i n . 3 i n . 2 i n . 1½ i n . 1 i n . ¾ i n . ½ i n . 3/ 8 i n . #4 #1 0 #2 0 #3 0 #4 0 #6 0 #1 0 0 #1 4 0 #2 0 0 SIEVE SIZE PERCENT SPEC.*PASS? OR DIAMETER FINER PERCENT (X=NO) Soil Description Atterberg Limits Coefficients Classification Remarks Source of Sample: Core-23 Depth: 4" Sample Number: S-1 Date: Client: Project: Project No:Figure Brown, poorly graded GRAVEL with silt and sand 2" 1-1/2" 1" 3/4" 1/2" 3/8" #4 #8 #16 #30 #50 #100 #200 100 100 100 91 70 59 38 27 20 15 11 8 5.6 100 95-100 70-95 55-85 30-60 12-30 0-8.0 X X 18.5421 16.8022 9.8739 7.3225 3.0180 0.5794 0.2527 39.07 3.65 GP-GM Percent Fractured*: 92 Natural Moisture: 6.9% *Particles with at least 2 fractured faces Century West Engineering Renton Municipal Airport Taxiway A Reconstruction 2023-027 PL=LL=PI= D90=D85=D60= D50=D30=D15= D10=Cu=Cc= USCS=AASHTO= *P-209 6/22/2023 C-18 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Appendix D Laboratory Test Results Tested By: TS Checked By: CM Moisture-Density Relationship D r y d e n s i t y , p c f 125 130 135 140 145 150 Water content, % - Rock Corrected - Uncorrected 1.5 3 4.5 6 7.5 9 10.5 5.1%, 143.4 pcf 6.8%, 135.8 pcf ZAV for Sp.G. = 2.66 Test specification: ASTM D4718-15 Oversize Corr. Applied to Each Test Point ASTM D 1557-12 Method C Modified 1.25ft GW 5.9 2.66 29 3.8 Dark brown, well-graded GRAVEL with sand 2023-027 Century West Engineering Specific Gravity Assumed 12/12/2023 D-1 Elev/Classification Nat.Sp.G.LL PI % >% < Depth USCS AASHTO Moist.3/4 in.No.200 ROCK CORRECTED TEST RESULTS UNCORRECTED MATERIAL DESCRIPTION Project No.Client:Remarks: Project: Date: Source of Sample: TP-17 Sample Number: S-1 Figure 135.8 pcf Maximum dry density = 143.4 pcf 6.8 % Optimum moisture = 5.1 % Renton Municipal Airport Taxiway A Reconstruction Tested By: TS Checked By: CM Moisture-Density Relationship D r y d e n s i t y , p c f 110 115 120 125 130 135 Water content, % - Rock Corrected - Uncorrected 2.5 5 7.5 10 12.5 15 17.5 8.8%, 126.4 pcf 9.3%, 124.6 pcf ZAV for Sp.G. = 2.65 Test specification: ASTM D4718-15 Oversize Corr. Applied to Each Test Point ASTM D 1557-12 Method C Modified 1.0ft SM 12.2 2.65 6 28.9 Dark yellowish-brown, silty SAND with gravel 2023-027 Century West Engineering Specific Gravity Assumed 12/12/2023 D-2 Elev/Classification Nat.Sp.G.LL PI % >% < Depth USCS AASHTO Moist.3/4 in.No.200 ROCK CORRECTED TEST RESULTS UNCORRECTED MATERIAL DESCRIPTION Project No.Client:Remarks: Project: Date: Source of Sample: TP-18 Sample Number: S-1 Figure 124.6 pcf Maximum dry density = 126.4 pcf 9.3 % Optimum moisture = 8.8 % Renton Municipal Airport Taxiway A Reconstruction Tested By: TS Checked By: CM Moisture-Density Relationship D r y d e n s i t y , p c f 105 110 115 120 125 130 Water content, % - Rock Corrected - Uncorrected 5 7 9 11 13 15 17 10.4%, 119.7 pcf 11.2%, 116.9 pcf ZAV for Sp.G. = 2.65 Test specification: ASTM D4718-15 Oversize Corr. Applied to Each Test Point ASTM D 1557-12 Method C Modified 1.5ft SM 17.9 2.65 8 31.4 Very dark gray, silty SAND with gravel 2023-027 Century West Engineering Specific Gravity Assumed 12/12/2023 D-3 Elev/Classification Nat.Sp.G.LL PI % >% < Depth USCS AASHTO Moist.3/4 in.No.200 ROCK CORRECTED TEST RESULTS UNCORRECTED MATERIAL DESCRIPTION Project No.Client:Remarks: Project: Date: Source of Sample: TP-19 Sample Number: S-1 Figure 116.9 pcf Maximum dry density = 119.7 pcf 11.2 % Optimum moisture = 10.4 % Renton Municipal Airport Taxiway A Reconstruction Tested By: TS Checked By: CM Moisture-Density Relationship Dr y d e n s i t y , p c f 95 100 105 110 115 120 Water content, % 10 12.5 15 17.5 20 22.5 25 15.3%, 110.0 pcf ZAV for Sp.G. = 2.65 Test specification:ASTM D 1557-12 Method C Modified 2.0ft ML 25.1 2.65 4 53.4 Dark brown, sandy SILT 2023-027 Century West Engineering Specific Gravity Assumed 12/12/2023 D-4 Elev/Classification Nat.Sp.G.LL PI % >% < Depth USCS AASHTO Moist.3/4 in.No.200 TEST RESULTS MATERIAL DESCRIPTION Project No.Client:Remarks: Project: Date: Source of Sample: TP-20 Sample Number: S-1 Figure Maximum dry density = 110.0 pcf Optimum moisture = 15.3 % Renton Municipal Airport Taxiway A Reconstruction Tested By: TS Checked By: CM Moisture-Density Relationship Dr y d e n s i t y , p c f 84 86 88 90 92 94 Water content, % 15 17.5 20 22.5 25 27.5 30 21.8%, 91.4 pcf ZAV for Sp.G. = 2.65 Test specification:ASTM D 1557-12 Method C Modified 2.0 ft ML 39.0 2.65 1 80.7 Olive-brown, silt with SAND 2023-027 Century West Engineering Specific Gravity Assumed 12/12/2023 D-5 Elev/Classification Nat.Sp.G.LL PI % >% < Depth USCS AASHTO Moist.3/4 in.No.200 TEST RESULTS MATERIAL DESCRIPTION Project No.Client:Remarks: Project: Date: Source of Sample: TP-21 Sample Number: S-1 Figure Maximum dry density = 91.4 pcf Optimum moisture = 21.8 % Renton Municipal Airport Taxiway A Reconstruction Tested By: TS Checked By: CM Moisture-Density Relationship Dr y d e n s i t y , p c f 100 102 104 106 108 110 Water content, % 10 12.5 15 17.5 20 22.5 25 17.3%, 106.1 pcf ZAV for Sp.G. = 2.65 Test specification:ASTM D 1557-12 Method C Modified 1.9ft SM 21.2 2.65 1 47.0 Very dark brown, silty SAND 2023-027 Century West Engineering Specific Gravity Assumed 12/12/2023 D-6 Elev/Classification Nat.Sp.G.LL PI % >% < Depth USCS AASHTO Moist.3/4 in.No.200 TEST RESULTS MATERIAL DESCRIPTION Project No.Client:Remarks: Project: Date: Source of Sample: TP-22 Sample Number: S-1 Figure Maximum dry density = 106.1 pcf Optimum moisture = 17.3 % Renton Municipal Airport Taxiway A Reconstruction CBR (California Bearing Ratio) OF LAB COMPACTED SOILS (ASTM D 1883) CLIENT: PROJECT:SAMPLE ID: PROJECT NO:Sampled By:Tested By: Date Sampled: Material Description: Sample Location: Compaction Standard:D698 X D1557 Condition:X Soaked for 96 hrs Unsoaked Max. Dry Density:pcf @ % M.C.with % scalped-off on the 3/4" sieve Dry Density (pcf) Percent Compaction Moisture before Compaction (%) Percent Swell (initial ht = 7") Moisture, Top 1", after Soak (%) CBR at 0.1" Penetration CBR at 0.2" Penetration CBR Value REVIEWED BY:FIGURE: Surcharge Weight (lbs)10 10 10 Moisture after Compaction (%)5.7 6.7 6.6 0.7 Moisture, after Soaking (%) 7.4 38.5 D-7CM 5.2 35.8 120.2 7.4 38.5 126.9 135.8 0.4 100.0 126.9 0.9 95.0 6.6 7.5 7.2 Trial 2 Renton Municipal Airport Taxiway A Reconstruction Date Received:Date Tested: Dark brown, well-graded GRAVEL with sand 12/12/2023 Trial 3 TP-17 9.6 TP-17, S-1 1/4/2024 TS Century West Engineering 2023-027 RA 12/12/2023 135.8 Trial 1 7.9 6.8 29 7.1 6.7 123.4 5.7 90.9 129.0 10.3 0 500 1000 1500 2000 2500 3000 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 St r e s s ( p s i ) Displacement (in) 90.9 95.0 100.0 0 20 40 60 80 100 120 140 85 90 95 100 105 CB R % Compaction CBR (California Bearing Ratio) OF LAB COMPACTED SOILS (ASTM D 1883) CLIENT: PROJECT:SAMPLE ID: PROJECT NO:Sampled By:Tested By: Date Sampled: Material Description: Sample Location: Compaction Standard:D698 X D1557 Condition:X Soaked for 96 hrs Unsoaked Max. Dry Density:pcf @ % M.C.with % scalped-off on the 3/4" sieve Dry Density (pcf) Percent Compaction Moisture before Compaction (%) Percent Swell (initial ht = 7") Moisture, Top 1", after Soak (%) CBR at 0.1" Penetration CBR at 0.2" Penetration CBR Value REVIEWED BY:FIGURE: 12.5 9.3 6 14.9 8.9 112.5 8.9 90.3 119.3 16.0 13.5 TP-18, S-1 12/29/2023 TS Century West Engineering 2023-027 RA 12/12/2023 124.6 Trial 1 Trial 2 Renton Municipal Airport Taxiway A Reconstruction Date Received:Date Tested: Dark yellowish-brown, silty SAND with gravel 12/12/2023 Trial 3 TP-18 124.9 0.2 100.2 12.1 0.3 95.8 8.9 15.6 14.6 2.0 8.9 12.1 1.8 8.2 11.1 2.0 8.9 D-8CM Surcharge Weight (lbs)10 10 10 Moisture after Compaction (%)8.9 8.9 8.9 0.3 Moisture, after Soaking (%) 0 50 100 150 200 250 300 350 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 St r e s s ( p s i ) Displacement (in) 90.3 95.8 100.2 0 2 4 6 8 10 12 14 85 90 95 100 105 CB R % Compaction CBR (California Bearing Ratio) OF LAB COMPACTED SOILS (ASTM D 1883) CLIENT: PROJECT:SAMPLE ID: PROJECT NO:Sampled By:Tested By: Date Sampled: Material Description: Sample Location: Compaction Standard:D698 X D1557 Condition:X Soaked for 96 hrs Unsoaked Max. Dry Density:pcf @ % M.C.with % scalped-off on the 3/4" sieve Dry Density (pcf) Percent Compaction Moisture before Compaction (%) Percent Swell (initial ht = 7") Moisture, Top 1", after Soak (%) CBR at 0.1" Penetration CBR at 0.2" Penetration CBR Value REVIEWED BY:FIGURE: Surcharge Weight (lbs)10 10 10 Moisture after Compaction (%)11.3 11.4 11.9 0.1 Moisture, after Soaking (%) 3.9 10.7 D-9CM 3.9 10.7 26.9 3.4 9.6 21.4 116.0 0.1 99.2 26.9 0.2 94.8 11.9 19.0 17.3 Trial 2 Renton Municipal Airport Taxiway A Reconstruction Date Received:Date Tested: Very dark gray, silty SAND with gravel 12/12/2023 Trial 3 TP-19 17.2 TP-19, S-1 12/29/2023 TS Century West Engineering 2023-027 RA 12/12/2023 116.9 Trial 1 15.3 11.2 8 21.7 11.4 105.1 11.3 89.9 110.8 19.5 0 100 200 300 400 500 600 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 St r e s s ( p s i ) Displacement (in) 89.9 94.8 99.2 0 5 10 15 20 25 30 85 90 95 100 105 CB R % Compaction CBR (California Bearing Ratio) OF LAB COMPACTED SOILS (ASTM D 1883) CLIENT: PROJECT:SAMPLE ID: PROJECT NO:Sampled By:Tested By: Date Sampled: Material Description: Sample Location: Compaction Standard:D698 X D1557 Condition:X Soaked for 96 hrs Unsoaked Max. Dry Density:pcf @ % M.C.with % scalped-off on the 3/4" sieve Dry Density (pcf) Percent Compaction Moisture before Compaction (%) Percent Swell (initial ht = 7") Moisture, Top 1", after Soak (%) CBR at 0.1" Penetration CBR at 0.2" Penetration CBR Value REVIEWED BY:FIGURE: Surcharge Weight (lbs)10 10 10 Moisture after Compaction (%)15.5 14.4 14.8 0.5 Moisture, after Soaking (%) 4.3 10.6 D-10CM 4.3 10.6 17.4 3.8 9.4 15.6 110.4 0.5 100.3 17.4 0.5 95.6 14.8 23.1 21.7 Trial 2 Renton Municipal Airport Taxiway A Reconstruction Date Received:Date Tested: Dark brown, sandy SILT 12/12/2023 Trial 3 TP-20 19.8 TP-20, S-1 12/29/2023 TS Century West Engineering 2023-027 RA 12/12/2023 110.0 Trial 1 18.4 15.3 4 24.5 14.4 98.8 15.5 89.8 105.2 23.6 0 50 100 150 200 250 300 350 400 450 500 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 St r e s s ( p s i ) Displacement (in) 89.8 95.6 100.3 0 2 4 6 8 10 12 14 16 18 20 85 90 95 100 105 CB R % Compaction CBR (California Bearing Ratio) OF LAB COMPACTED SOILS (ASTM D 1883) CLIENT: PROJECT:SAMPLE ID: PROJECT NO:Sampled By:Tested By: Date Sampled: Material Description: Sample Location: Compaction Standard:D698 X D1557 Condition:X Soaked for 96 hrs Unsoaked Max. Dry Density:pcf @ % M.C.with % scalped-off on the 3/4" sieve Dry Density (pcf) Percent Compaction Moisture before Compaction (%) Percent Swell (initial ht = 7") Moisture, Top 1", after Soak (%) CBR at 0.1" Penetration CBR at 0.2" Penetration CBR Value REVIEWED BY:FIGURE: 32.1 21.8 1 43.0 23.1 81.4 22.7 89.1 85.7 38.6 35.6 TP-21, S-1 1/4/2024 TS Century West Engineering 2023-027 RA 12/12/2023 91.4 Trial 1 Trial 2 Renton Municipal Airport Taxiway A Reconstruction Date Received:Date Tested: Olive-brown, SILT with sand 12/12/2023 Trial 3 TP-21 91.2 0.8 99.7 35.7 0.8 93.8 21.9 41.6 32.9 3.8 6.4 35.7 4.2 8.0 33.2 4.2 8.0 D-11CM Surcharge Weight (lbs)10 10 10 Moisture after Compaction (%)22.7 23.1 21.9 1.4 Moisture, after Soaking (%) 0 100 200 300 400 500 600 700 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 St r e s s ( p s i ) Displacement (in) 89.1 93.8 99.7 0 5 10 15 20 25 30 35 40 85 90 95 100 105 CB R % Compaction CBR (California Bearing Ratio) OF LAB COMPACTED SOILS (ASTM D 1883) CLIENT: PROJECT:SAMPLE ID: PROJECT NO:Sampled By:Tested By: Date Sampled: Material Description: Sample Location: Compaction Standard:D698 X D1557 Condition:X Soaked for 96 hrs Unsoaked Max. Dry Density:pcf @ % M.C.with % scalped-off on the 3/4" sieve Dry Density (pcf) Percent Compaction Moisture before Compaction (%) Percent Swell (initial ht = 7") Moisture, Top 1", after Soak (%) CBR at 0.1" Penetration CBR at 0.2" Penetration CBR Value REVIEWED BY:FIGURE: 20.3 17.3 1 26.1 17.4 95.2 17.6 89.7 100.7 24.7 22.7 TP-22, S-1 1/4/2024 TS Century West Engineering 2023-027 RA 12/12/2023 106.1 Trial 1 Trial 2 Renton Municipal Airport Taxiway A Reconstruction Date Received:Date Tested: Very dark brown, silty SAND 12/12/2023 Trial 3 TP-22 105.6 0.4 99.5 28.5 0.3 94.9 17.6 23.6 22.5 5.1 11.5 28.5 4.6 10.4 26.4 5.1 11.5 D-12CM Surcharge Weight (lbs)10 10 10 Moisture after Compaction (%)17.6 17.4 17.6 0.3 Moisture, after Soaking (%) 0 100 200 300 400 500 600 700 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 St r e s s ( p s i ) Displacement (in) 89.7 94.9 99.5 0 5 10 15 20 25 30 85 90 95 100 105 CB R % Compaction 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Appendix E Pavement Condition Photos 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Appendix E Pavement Condition Photos 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-1. Core-1 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-2. Core-2 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-3. Core-3 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-4. Core-4 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-5. Core-5 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-6. Core-6 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-7. Core-7 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-8. Core-8 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-9. Core-9 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-10. Core-10 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-11. Core-11 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-12. Core-12 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-13. Core-13 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-14. Core-14 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-15. Core-15 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-16. Core-16 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-17. Core-17 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-18. Core-18 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-19. Core-19 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-20. Core-20 Pavement Condition. B-19 is also shown. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-21. Core-21 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-22. Core-22 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-23. Core-23 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-24. B-1 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-25. B-2 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-26. B-3 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-27. B-4 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-28. B-5 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-29. B-6 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-30. B-7 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-31. B-8 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-32. B-9 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-33. B-10 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-34. B-11 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-35. B-12 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-36. B-13 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-37. B-14 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-38. B-15 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-39. B-16 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-40. B-17 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-41. B-18 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-42. B-19 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-43. B-20 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-44. B-21 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-45. B-22 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-46. B-23 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-47. B-24 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure E-48. B-25 Pavement Condition. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Appendix F Historical Photographs 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure F-1. Captain Burrows Resort at the mouth of the Black River, circa 1907. Source: Image 648A, Courtesy of Renton Historical Society, Renton, WA. Figure F-2. Captain Burrows Resort at the mouth of the Black River, circa 1902. Source: Image 831A, Courtesy of Renton Historical Society, Renton, WA. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure F-3. Black River Dries Out, July 1916. Source: Seattle Times. Courtesy of Renton History Museum. RHM# 1994.068.3883, Renton, WA. Figure F-4. Boeing Renton Plant Under Construction, Cedar River and Future Renton Airport at Top of Picture. Courtesy of the Boeing Company. 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com Figure F-5. Renton Airport circa 1945. Courtesy of the Boeing Company. Memorandum April 23, 2025 68 Excelsior Avenue, Suite 101 Saratoga Springs, New York 12866 518.792.3709 To: William Adams and Manuel Cruz, City of Renton, Washington From: Sarah LaRoe, Christopher Yates, and Anna Spooner, Anchor QEA cc: Re: Renton Municipal Airport PFAS Sampling Investigation This technical memorandum summarizes the field sampling procedures and results for soil and asphalt sampling conducted at the Renton Municipal Airport by Anchor QEA on April 2, 2025. This work was completed for the City of Renton (the City) in accordance with the scope of work submitted to the City on March 21 and accepted on March 26, 2025. Summary of Sampling Activities Anchor QEA collected 14 samples for PFAS contamination analysis at 4 locations: 4 standard asphalt samples, 4 standard soil samples, 2 field duplicate samples, and 4 water samples (field blanks). Sample locations are shown in Figure 1. Asphalt Sampling A handheld drill was used for asphalt sampling. All supplies were decontaminated before use in the sampling process. New nitrile gloves were donned before each new sample collection. A field blank sample of rinse water was taken at the beginning and end of the sampling process. Field blank sampling was conducted by rinsing the drill bit with laboratory-verified PFAS-free water, and the resulting runoff was collected in a labeled sample container. For asphalt collection, 10-inch drill bits were used and multiple holes drilled to collect sufficient sample material. To collect an asphalt sample, a clean sheet of aluminum foil was placed over the area to be drilled. A hole was then drilled through the foil to the specified depth of 10 inches or refusal, whichever occurred first. The cuttings from the drilling process were then transferred from the foil to a decontaminated metal bowl. The drilling process was repeated at the same location until it was determined that sufficient cuttings were collected for an asphalt sample. The cuttings were homogenized in the metal bowl by mixing them with a decontaminated metal spoon. The resulting mixture was then poured into a labeled sample container and placed in a cooler for preservation. The process was repeated at each specified sampling location until all samples were collected. A field duplicate of a soil sample was taken at a randomly selected sampling location for quality assurance. April 23, 2025 Page 2 Soil Sampling A handheld bucket auger was used for soil sampling. All supplies were decontaminated before use in the sampling process. New nitrile gloves were donned before each new sample collection. A field blank sample of rinse water was taken at the beginning and end of the sampling process. Field blank samples were taken by rinsing the bucket auger with laboratory-verified PFAS-free water, and the resulting runoff was collected in a sample container. To collect a soil sample using the hand auger, the soil surface was excavated 6 inches at a time and the soil was placed in a decontaminated stainless-steel bowl. The process was repeated to the specified depth of 24 inches or to refusal, whichever occurred first. The soil was then mixed in the bowl with a decontaminated metal spoon until the sample was homogenized. A labeled sample container was filled with the homogenized soil and then placed in a cooler for preservation. The process was repeated at each specified sampling location until all samples were collected. A field duplicate of a soil sample was taken at a randomly selected sampling location for quality assurance. Analytical Results Samples were sent to Eurofins Environmental Test Laboratory in Sacramento, California, for analysis using EPA Method 1633. Results were reviewed and found complete by Anchor QEA staff. All field blanks (water samples) were non-detect for all PFAS compounds, indicating that cross contamination was likely not present. In addition, the results of the field duplicates were within quality control limits. The laboratory analytical report is presented as Attachment A. The Method C Washington State Department of Ecology PFAS Direct Contact Soil Cleanup Levels1 are presented in Table 1. Because the Renton Airport meets the Department of Ecology’s definition of an industrial property, the Method C cleanup levels are the most relevant to the site 2. The concentrations of compounds detected in the soil or asphalt samples are summarized in Table 2. The remainder of the analytes in EPA Method 1633 were not detected in any sample. All analytes were below the Method C Direct Contact Soil Cleanup Levels published in February 2025. 1 Available at https://ecology.wa.gov/Regulations-Permits/Guidance-technical-assistance/Contamination-clean-up-tools/CLARC 2 A guidance document on the derivation of soil cleanup levels is available at https://apps.ecology.wa.gov/publications/documents/0109071.pdf. The definition of industrial property is available under regulation WAC 173-340-200 at https://app.leg.wa.gov/wac/default.aspx?cite=173-340-200 Tables Table 1 Washington State Department of Ecology PFAS Direct Contact Soil Cleanup Levels Chemical Name Method C Direct Contact Noncancer Method C Direct Contact Cancer 6:2 Fluorotelomer sulfonate (6:2 FTS) Hexafluoropropylene Oxide Dimer Acid (HFPO-DA; GenX) 11000 Perfluorobutanoate (PFBA) 3500000 Perfluorobutane sulfonate (PFBS) 1100000 Perfluorohexanoate (PFHxA) 1800000 Perfluorohexane sulfonate (PFHxS) 1.4 Perfluorooctanoate (PFOA) 110 4.5 Perfluorooctane sulfonate (PFOS) 350 3300 Perfluorononanoate (PFNA) 8800 Perfluorodecanoate (PFDA) 7 Note: Units are microgram per kilogram (µg/kg) Table 2 Detected PFAS Concentrations in Soil and Asphalt Samples Sample ID Location Number Sample Type Matrix PFBS PFHxS PFOS PFOA PFNA PFDS CORMAS-25-A001 001 Standard Asphalt 0.088 0.15 1.7 ND ND ND CORMAS-25-A002 002 Standard Asphalt 0.12 0.23 2.7 ND ND 0.088 CORMAS-25-A003 003 Standard Asphalt 0.063 0.11 1.4 ND ND ND CORMAS-25-A005 003 Field Duplicate Asphalt 0.056 0.11 1.4 ND ND ND CORMAS-25-A004 004 Standard Asphalt 0.11 0.16 1.9 ND ND 0.06 CORMAS-25-S001 001 Standard Soil ND ND 0.29 ND ND ND CORMAS-25-S002 002 Standard Soil ND 0.084 0.28 0.081 0.05 ND CORMAS-25-S005 002 Field Duplicate Soil ND 0.078 0.4 0.081 0.05 ND CORMAS-25-S003 003 Standard Soil ND ND 0.2 ND ND ND CORMAS-25-S004 004 Standard Soil ND ND 0.79 ND ND ND Notes: Units are microgram per kilogram (µg/kg) ND: not detected PFBS: perfluorobutane sulfonate PFHxS: perfluorohexane sulfonate PFOS: perfluorooctane sulfonate PFOA: perfluorooctanoate PFNA: perfluorononanoate PFDS: perfluorodecanoate Figure % 87th Ave S 87th A ve S C e d a r Ri ve r W Perimeter R d 88th Ave S S 11 5t h Pl S 1 2 0 t h P l Rai nie r Av e S Boeing 4-51 Boeing 4-78 Boeing 4-44 Boeing 4-42 Boeing 4-41 Renton Rowing Center Lakeview C e d ar R i v e r Lind Ave NW Taylo r P l N W NW 6 t h S t N R iverside Dr E Pe ri mete r Rd NW 4t h S t S 1 21s t St S 1 2 2n d St Renton Municipal Airport Taylor West Kizuki Ramen Saint Vincent de Paul Thrift Store Pro-Flight NW 3r d P l Maple A ve N W NW 2nd P l Lind A v e NW NW 2 nd S t Church of Grace Koda Motors El Muchacho Alegre Aero-Dy ne Aviation Boeing 4-70 Boeing 4-79 Boeing Badge Office - Renton Plant Boeing 4-21 Boeing 4-20 Boeing 4-04 LA Fitness Boeing 4-81 E P e r i meter R d Burnett A ve N Williams A ve N Renton Memorial Stadium Di Martino Dental Labratories The Wellsf orth Boeing 5-403 Boeing 5-27 Truck Inspection Signature Auto Detail Boeing 4-69 Topgolf Williams A v e N LadyBug Bikini Espresso Ace Aviation Renton Senior Activity Center &250$6$ &250$66 &250$6$&250$66&250$6$ &250$66 &250$6$ &250$66&250$66 ' &250$6$ ' Publish Date: 2025/04/22, 9:44 AM | User: alesueur Filepath: \\gstfile01\gis\Jobs\City_of_Renton_0355\Maps\Airport_PFAS\Renton_Airport_PFAS.aprx Figure 1 PFAS Sampling Locations Renton Municipal Airport Renton, Washington LEGEND: PFAS Sample Location Asphalt Soil :0 500 Feet NOTES:1. Basemap: Esri World Imagery and Hybrid Reference Layer2. Sample location points are labeled with their Sample IDs. (D) indicates a field duplicate sample. Attachment A UDS Level 2 Final Report ANALYTICAL REPORT PREPARED FOR Attn: William Adams City of Renton 1055 S. Grady Way 5th Floor RENTON, Washington 98057 Generated 4/10/2025 4:50:20 PM JOB DESCRIPTION Renton Airport JOB NUMBER 320-120292-1 See page two for job notes and contact information. West Sacramento CA 95605 880 Riverside Parkway Eurofins Sacramento Page 1 of 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Eurofins Sacramento Eurofins Sacramento is a laboratory within Eurofins Environment Testing Northern California, LLC, a company within Eurofins Environment Testing Group of Companies Job Notes This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page. The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins Environment Testing Northern California, LLC Project Manager. Authorization Generated 4/10/2025 4:50:20 PM Authorized for release by Jill Kellmann, Client Service Manager Jill.Kellmann@et.eurofinsus.com (916)374-4402 Page 2 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Table of Contents Client: City of Renton Project/Site: Renton Airport Laboratory Job ID: 320-120292-1 Page 3 of 64 Eurofins Sacramento 4/10/2025 Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Definitions/Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Isotope Dilution Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 QC Association Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 Lab Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Definitions/Glossary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Qualifiers LCMS Qualifier Description *5-Isotope dilution analyte is outside acceptance limits, low biased. Qualifier *5+Isotope dilution analyte is outside acceptance limits, high biased. I Value is EMPC (estimated maximum possible concentration). J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. Glossary These commonly used abbreviations may or may not be present in this report. ☼Listed under the "D" column to designate that the result is reported on a dry weight basis Abbreviation %R Percent Recovery CFL Contains Free Liquid CFU Colony Forming Unit CNF Contains No Free Liquid DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor DL Detection Limit (DoD/DOE) DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry) EDL Estimated Detection Limit (Dioxin) LOD Limit of Detection (DoD/DOE) LOQ Limit of Quantitation (DoD/DOE) MCL EPA recommended "Maximum Contaminant Level" MDA Minimum Detectable Activity (Radiochemistry) MDC Minimum Detectable Concentration (Radiochemistry) MDL Method Detection Limit ML Minimum Level (Dioxin) MPN Most Probable Number MQL Method Quantitation Limit NC Not Calculated ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent POS Positive / Present PQL Practical Quantitation Limit PRES Presumptive QC Quality Control RER Relative Error Ratio (Radiochemistry) RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) TNTC Too Numerous To Count Eurofins Sacramento Page 4 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Job Narrative 320-120292-1 Receipt The samples were received on 4/3/2025 9:15 AM.Unless otherwise noted below,the samples arrived in good condition,and where required,properly preserved and on ice.The temperature of the cooler at receipt was 4.1ºC. LCMS Method 1633:Isotope Dilution Analyte (IDA)recovery is above the method recommended limit for the following samples: CORMAS-25-W003 (320-120292-11),(LCSD 320-844272/4-A)and (MB 320-844272/1-A).Quantitation by isotope dilution generally precludes any adverse effect on data quality due to elevated IDA recoveries. Method 1633:The low level continuing calibration verification (CCVL)and continuing calibration verifications (CCVs)associated with batch 320-845256 recovered above the upper control limit for one or more of the following isotope dilution analytes (IDAs), 13C2 4:2 FTS,13C2 6:2 FTS and 13C2 8:2 FTS.The associated target analytes 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS),1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)and 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS)were within control limits.The samples and MB associated with these CCVs were non-detects,the low level laboratory control sample (LLCS), laboratory control sample (LCS),and laboratory control sample duplicate (LCSD)was in control for the affected analytes;therefore, the data have been reported.The associated samples are:CORMAS-25-A001 (320-120292-1),CORMAS-25-A002 (320-120292-2),CORMAS-25-S003 (320-120292-3),CORMAS-25-S002 (320-120292-4),CORMAS-25-S004 (320-120292-5), CORMAS-25-S001 (320-120292-6),CORMAS-25-A005 (320-120292-7),CORMAS-25-A003 (320-120292-8),CORMAS-25-S005 (320-120292-9),CORMAS-25-A004 (320-120292-10),(CCV 320-845256/20),(CCV 320-845256/26),(CCV 320-845256/7),(CCVL 320-845256/6),(LCS 320-844949/3-A),(LCSD 320-844949/4-A),(LLCS 320-844949/2-A)and (MB 320-844949/1-A). Method 1633:Isotope Dilution Analyte (IDA)recovery is above the method recommended limit for the following samples: CORMAS-25-S003 (320-120292-3),CORMAS-25-S002 (320-120292-4),CORMAS-25-S004 (320-120292-5),CORMAS-25-A005 (320-120292-7),CORMAS-25-A003 (320-120292-8)and CORMAS-25-S005 (320-120292-9).Quantitation by isotope dilution generally precludes any adverse effect on data quality due to elevated IDA recoveries. Method 1633:The Isotope Dilution Analyte (IDA)recovery associated with the following samples is below the method recommended limit:CORMAS-25-S003 (320-120292-3)and CORMAS-25-S001 (320-120292-6).Generally,data quality is not considered affected if the IDA signal-to-noise ratio is greater than 10:1,which is achieved for all IDA in the samples. Method 1633:The "I"qualifier means the transition mass ratio for the indicated analyte was outside the established ratio limits.The qualitative identification of the analyte has some degree of uncertainty.The associated samples have been flagged:CORMAS-25- S002 (320-120292-4)and CORMAS-25-S005 (320-120292-9). No additional analytical or quality issues were noted,other than those described above or in the Definitions/Glossary page. General Chemistry No analytical or quality issues were noted,other than those described in the Definitions/Glossary page. Organic Prep Method 1633 Shake:The following samples in preparation batch 320-844949 were yellow in color following extraction: CORMAS-25-A001 (320-120292-1),CORMAS-25-A002 (320-120292-2),CORMAS-25-S004 (320-120292-5),CORMAS-25-A005 (320-120292-7),CORMAS-25-A003 (320-120292-8)and CORMAS-25-A004 (320-120292-10). No additional analytical or quality issues were noted,other than those described above or in the Definitions/Glossary page. Case Narrative Client: City of Renton Job ID: 320-120292-1 Project: Renton Airport Eurofins Sacramento Job ID: 320-120292-1 Eurofins Sacramento Page 5 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Detection Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Client Sample ID: CORMAS-25-A001 Lab Sample ID: 320-120292-1 Perfluorobutanesulfonic acid (PFBS) RL 0.20 ug/Kg MDL 0.050 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA1J0.088 1633 Perfluorohexanesulfonic acid (PFHxS)0.20 ug/Kg0.050 Total/NA10.15 J 1633 Perfluorooctanesulfonic acid (PFOS)0.20 ug/Kg0.050 Total/NA11.7 1633 Client Sample ID: CORMAS-25-A002 Lab Sample ID: 320-120292-2 Perfluorobutanesulfonic acid (PFBS) RL 0.20 ug/Kg MDL 0.050 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA1J0.12 1633 Perfluorohexanesulfonic acid (PFHxS)0.20 ug/Kg0.050 Total/NA10.23 1633 Perfluorooctanesulfonic acid (PFOS)0.20 ug/Kg0.050 Total/NA12.7 1633 Perfluorodecanesulfonic acid (PFDS)0.20 ug/Kg0.050 Total/NA10.088 J 1633 Client Sample ID: CORMAS-25-S003 Lab Sample ID: 320-120292-3 ☼Perfluorooctanesulfonic acid (PFOS) RL 0.19 ug/Kg MDL 0.048 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA10.20 1633 Client Sample ID: CORMAS-25-S002 Lab Sample ID: 320-120292-4 ☼Perfluorooctanoic acid (PFOA) RL 0.20 ug/Kg MDL 0.062 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA1J0.081 1633 ☼Perfluorononanoic acid (PFNA)0.20 ug/Kg0.050 Total/NA10.050 J I 1633 ☼Perfluorohexanesulfonic acid (PFHxS)0.20 ug/Kg0.050 Total/NA10.084 J 1633 ☼Perfluorooctanesulfonic acid (PFOS)0.20 ug/Kg0.050 Total/NA10.28 1633 Client Sample ID: CORMAS-25-S004 Lab Sample ID: 320-120292-5 ☼Perfluorooctanesulfonic acid (PFOS) RL 0.20 ug/Kg MDL 0.051 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA10.79 1633 Client Sample ID: CORMAS-25-S001 Lab Sample ID: 320-120292-6 ☼Perfluorooctanesulfonic acid (PFOS) RL 0.20 ug/Kg MDL 0.049 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA10.29 1633 Client Sample ID: CORMAS-25-A005 Lab Sample ID: 320-120292-7 Perfluorobutanesulfonic acid (PFBS) RL 0.19 ug/Kg MDL 0.049 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA1J0.056 1633 Perfluorohexanesulfonic acid (PFHxS)0.19 ug/Kg0.049 Total/NA10.11 J 1633 Perfluorooctanesulfonic acid (PFOS)0.19 ug/Kg0.049 Total/NA11.4 1633 Client Sample ID: CORMAS-25-A003 Lab Sample ID: 320-120292-8 Perfluorobutanesulfonic acid (PFBS) RL 0.20 ug/Kg MDL 0.050 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA1J0.063 1633 Perfluorohexanesulfonic acid (PFHxS)0.20 ug/Kg0.050 Total/NA10.11 J 1633 Perfluorooctanesulfonic acid (PFOS)0.20 ug/Kg0.050 Total/NA11.4 1633 Client Sample ID: CORMAS-25-S005 Lab Sample ID: 320-120292-9 ☼Perfluorooctanoic acid (PFOA) RL 0.20 ug/Kg MDL 0.062 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA1J0.081 1633 ☼Perfluorononanoic acid (PFNA)0.20 ug/Kg0.050 Total/NA10.050 J I 1633 ☼Perfluorohexanesulfonic acid (PFHxS)0.20 ug/Kg0.050 Total/NA10.078 J 1633 Eurofins Sacramento This Detection Summary does not include radiochemical test results. Page 6 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Detection Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Client Sample ID: CORMAS-25-S005 (Continued)Lab Sample ID: 320-120292-9 ☼Perfluorooctanesulfonic acid (PFOS) RL 0.20 ug/Kg MDL 0.050 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA10.40 1633 Client Sample ID: CORMAS-25-A004 Lab Sample ID: 320-120292-10 Perfluorobutanesulfonic acid (PFBS) RL 0.20 ug/Kg MDL 0.049 Analyte Result Qualifier Unit Dil Fac D Method Prep Type Total/NA1J0.11 1633 Perfluorohexanesulfonic acid (PFHxS)0.20 ug/Kg0.049 Total/NA10.16 J 1633 Perfluorooctanesulfonic acid (PFOS)0.20 ug/Kg0.049 Total/NA11.9 1633 Perfluorodecanesulfonic acid (PFDS)0.20 ug/Kg0.049 Total/NA10.060 J 1633 Client Sample ID: CORMAS-25-W003 Lab Sample ID: 320-120292-11 No Detections. Client Sample ID: CORMAS-25-W004 Lab Sample ID: 320-120292-12 No Detections. Client Sample ID: CORMAS-25-W002 Lab Sample ID: 320-120292-13 No Detections. Client Sample ID: CORMAS-25-W001 Lab Sample ID: 320-120292-14 No Detections. Eurofins Sacramento This Detection Summary does not include radiochemical test results. Page 7 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-1Client Sample ID: CORMAS-25-A001 Matrix: SolidDate Collected: 04/02/25 09:00 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 12:28 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoropentanoic acid (PFPeA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorohexanoic acid (PFHxA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoroheptanoic acid (PFHpA) 0.20 0.061 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorooctanoic acid (PFOA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorononanoic acid (PFNA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorodecanoic acid (PFDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoroundecanoic acid (PFUnA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorododecanoic acid (PFDoA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.057 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 10.088 JPerfluorobutanesulfonic acid (PFBS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 10.15 JPerfluorohexanesulfonic acid (PFHxS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoroheptanesulfonic acid (PFHpS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 11.7Perfluorooctanesulfonic acid (PFOS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorononanesulfonic acid (PFNS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorodecanesulfonic acid (PFDS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorododecanesulfonic acid (PFDoS) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.061 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) Eurofins Sacramento Page 8 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-1Client Sample ID: CORMAS-25-A001 Matrix: SolidDate Collected: 04/02/25 09:00 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.20 0.074 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:28 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:28 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 87.6 8 -130 04/09/25 06:19 04/10/25 12:28 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 110 04/09/25 06:19 04/10/25 12:28 135-130 13C5 PFHxA 102 04/09/25 06:19 04/10/25 12:28 140-130 13C4 PFHpA 95.1 04/09/25 06:19 04/10/25 12:28 140-130 13C8 PFOA 86.7 04/09/25 06:19 04/10/25 12:28 140-130 13C9 PFNA 88.9 04/09/25 06:19 04/10/25 12:28 140-130 13C6 PFDA 82.7 04/09/25 06:19 04/10/25 12:28 140-130 13C7 PFUnA 75.4 04/09/25 06:19 04/10/25 12:28 140-130 13C2 PFDoA 77.5 04/09/25 06:19 04/10/25 12:28 140-130 13C2 PFTeDA 72.8 04/09/25 06:19 04/10/25 12:28 120-130 13C3 PFBS 73.6 04/09/25 06:19 04/10/25 12:28 140-135 13C3 PFHxS 74.0 04/09/25 06:19 04/10/25 12:28 140-130 13C8 PFOS 67.1 04/09/25 06:19 04/10/25 12:28 140-130 13C8 FOSA 66.0 04/09/25 06:19 04/10/25 12:28 140-130 d3-NMeFOSAA 55.6 04/09/25 06:19 04/10/25 12:28 140-135 d5-NEtFOSAA 57.2 04/09/25 06:19 04/10/25 12:28 140-150 13C2 4:2 FTS 129 04/09/25 06:19 04/10/25 12:28 140-165 13C2 6:2 FTS 115 04/09/25 06:19 04/10/25 12:28 140-215 13C2 8:2 FTS 157 04/09/25 06:19 04/10/25 12:28 140-275 13C3 HFPO-DA 97.1 04/09/25 06:19 04/10/25 12:28 140-130 d7-N-MeFOSE-M 57.7 04/09/25 06:19 04/10/25 12:28 120-130 d9-N-EtFOSE-M 42.6 04/09/25 06:19 04/10/25 12:28 115-130 d5-NEtPFOSA 23.8 04/09/25 06:19 04/10/25 12:28 110-130 d3-NMePFOSA 22.9 04/09/25 06:19 04/10/25 12:28 110-130 Lab Sample ID: 320-120292-2Client Sample ID: CORMAS-25-A002 Matrix: SolidDate Collected: 04/02/25 11:01 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 12:44 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluoropentanoic acid (PFPeA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorohexanoic acid (PFHxA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluoroheptanoic acid (PFHpA) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorooctanoic acid (PFOA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorononanoic acid (PFNA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorodecanoic acid (PFDA) Eurofins Sacramento Page 9 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-2Client Sample ID: CORMAS-25-A002 Matrix: SolidDate Collected: 04/02/25 11:01 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluoroundecanoic acid (PFUnA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorododecanoic acid (PFDoA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.058 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 10.12 JPerfluorobutanesulfonic acid (PFBS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 10.23Perfluorohexanesulfonic acid (PFHxS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluoroheptanesulfonic acid (PFHpS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 12.7Perfluorooctanesulfonic acid (PFOS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorononanesulfonic acid (PFNS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 10.088 JPerfluorodecanesulfonic acid (PFDS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorododecanesulfonic acid (PFDoS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.063 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.20 0.075 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 12:44 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) Eurofins Sacramento Page 10 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-2Client Sample ID: CORMAS-25-A002 Matrix: SolidDate Collected: 04/02/25 11:01 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:44 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 3-Perfluoropentylpropanoic acid (5:3 FTCA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 12:44 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 91.0 8 -130 04/09/25 06:19 04/10/25 12:44 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 121 04/09/25 06:19 04/10/25 12:44 135-130 13C5 PFHxA 103 04/09/25 06:19 04/10/25 12:44 140-130 13C4 PFHpA 93.6 04/09/25 06:19 04/10/25 12:44 140-130 13C8 PFOA 89.6 04/09/25 06:19 04/10/25 12:44 140-130 13C9 PFNA 85.9 04/09/25 06:19 04/10/25 12:44 140-130 13C6 PFDA 87.4 04/09/25 06:19 04/10/25 12:44 140-130 13C7 PFUnA 81.7 04/09/25 06:19 04/10/25 12:44 140-130 13C2 PFDoA 81.7 04/09/25 06:19 04/10/25 12:44 140-130 13C2 PFTeDA 68.8 04/09/25 06:19 04/10/25 12:44 120-130 13C3 PFBS 77.9 04/09/25 06:19 04/10/25 12:44 140-135 13C3 PFHxS 75.9 04/09/25 06:19 04/10/25 12:44 140-130 13C8 PFOS 69.1 04/09/25 06:19 04/10/25 12:44 140-130 13C8 FOSA 68.4 04/09/25 06:19 04/10/25 12:44 140-130 d3-NMeFOSAA 59.2 04/09/25 06:19 04/10/25 12:44 140-135 d5-NEtFOSAA 59.3 04/09/25 06:19 04/10/25 12:44 140-150 13C2 4:2 FTS 155 04/09/25 06:19 04/10/25 12:44 140-165 13C2 6:2 FTS 142 04/09/25 06:19 04/10/25 12:44 140-215 13C2 8:2 FTS 196 04/09/25 06:19 04/10/25 12:44 140-275 13C3 HFPO-DA 95.8 04/09/25 06:19 04/10/25 12:44 140-130 d7-N-MeFOSE-M 60.9 04/09/25 06:19 04/10/25 12:44 120-130 d9-N-EtFOSE-M 43.8 04/09/25 06:19 04/10/25 12:44 115-130 d5-NEtPFOSA 22.4 04/09/25 06:19 04/10/25 12:44 110-130 d3-NMePFOSA 22.7 04/09/25 06:19 04/10/25 12:44 110-130 Lab Sample ID: 320-120292-3Client Sample ID: CORMAS-25-S003 Matrix: SolidDate Collected: 04/02/25 12:15 Percent Solids: 88.3Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.38 0.096 ug/Kg ☼04/09/25 06:19 04/10/25 13:01 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoropentanoic acid (PFPeA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorohexanoic acid (PFHxA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoroheptanoic acid (PFHpA) 0.19 0.060 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorooctanoic acid (PFOA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorononanoic acid (PFNA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorodecanoic acid (PFDA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoroundecanoic acid (PFUnA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorododecanoic acid (PFDoA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorotridecanoic acid (PFTrDA) 0.19 0.056 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorotetradecanoic acid (PFTeDA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorobutanesulfonic acid (PFBS) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoropentanesulfonic acid (PFPeS) Eurofins Sacramento Page 11 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-3Client Sample ID: CORMAS-25-S003 Matrix: SolidDate Collected: 04/02/25 12:15 Percent Solids: 88.3Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.19 0.048 ug/Kg ☼04/09/25 06:19 04/10/25 13:01 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorohexanesulfonic acid (PFHxS) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoroheptanesulfonic acid (PFHpS) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼0.20Perfluorooctanesulfonic acid (PFOS) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorononanesulfonic acid (PFNS) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorodecanesulfonic acid (PFDS) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorododecanesulfonic acid (PFDoS) 0.38 0.096 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.38 0.096 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.38 0.096 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.19 0.060 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluorooctanesulfonamide (PFOSA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 0.96 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 0.96 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.19 0.060 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.19 0.072 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.19 0.048 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.38 0.096 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 0.96 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 0.96 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:01 1☼ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 85.7 8 -130 04/09/25 06:19 04/10/25 13:01 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 127 04/09/25 06:19 04/10/25 13:01 135-130 13C5 PFHxA 91.4 04/09/25 06:19 04/10/25 13:01 140-130 13C4 PFHpA 96.9 04/09/25 06:19 04/10/25 13:01 140-130 Eurofins Sacramento Page 12 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-3Client Sample ID: CORMAS-25-S003 Matrix: SolidDate Collected: 04/02/25 12:15 Percent Solids: 88.3Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) 13C8 PFOA 82.8 40 -130 04/09/25 06:19 04/10/25 13:01 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C9 PFNA 56.2 04/09/25 06:19 04/10/25 13:01 140-130 13C6 PFDA 44.6 04/09/25 06:19 04/10/25 13:01 140-130 13C7 PFUnA 39.7 *5-04/09/25 06:19 04/10/25 13:01 140-130 13C2 PFDoA 40.5 04/09/25 06:19 04/10/25 13:01 140-130 13C2 PFTeDA 16.1 *5-04/09/25 06:19 04/10/25 13:01 120-130 13C3 PFBS 74.7 04/09/25 06:19 04/10/25 13:01 140-135 13C3 PFHxS 78.9 04/09/25 06:19 04/10/25 13:01 140-130 13C8 PFOS 50.5 04/09/25 06:19 04/10/25 13:01 140-130 13C8 FOSA 54.5 04/09/25 06:19 04/10/25 13:01 140-130 d3-NMeFOSAA 26.7 *5-04/09/25 06:19 04/10/25 13:01 140-135 d5-NEtFOSAA 24.3 *5-04/09/25 06:19 04/10/25 13:01 140-150 13C2 4:2 FTS 182 *5+04/09/25 06:19 04/10/25 13:01 140-165 13C2 6:2 FTS 154 04/09/25 06:19 04/10/25 13:01 140-215 13C2 8:2 FTS 74.4 04/09/25 06:19 04/10/25 13:01 140-275 13C3 HFPO-DA 85.1 04/09/25 06:19 04/10/25 13:01 140-130 d7-N-MeFOSE-M 55.6 04/09/25 06:19 04/10/25 13:01 120-130 d9-N-EtFOSE-M 57.6 04/09/25 06:19 04/10/25 13:01 115-130 d5-NEtPFOSA 65.2 04/09/25 06:19 04/10/25 13:01 110-130 d3-NMePFOSA 52.2 04/09/25 06:19 04/10/25 13:01 110-130 General Chemistry RL MDL 12 0.10 0.10 %04/08/25 12:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Percent Moisture (EPA 1633) 0.10 0.10 %04/08/25 12:26 188Percent Solids (EPA 1633) Lab Sample ID: 320-120292-4Client Sample ID: CORMAS-25-S002 Matrix: SolidDate Collected: 04/02/25 11:20 Percent Solids: 78.5Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.40 0.10 ug/Kg ☼04/09/25 06:19 04/10/25 13:17 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoropentanoic acid (PFPeA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorohexanoic acid (PFHxA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoroheptanoic acid (PFHpA) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼0.081 JPerfluorooctanoic acid (PFOA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼0.050 J IPerfluorononanoic acid (PFNA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorodecanoic acid (PFDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoroundecanoic acid (PFUnA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorododecanoic acid (PFDoA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.058 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorobutanesulfonic acid (PFBS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼0.084 JPerfluorohexanesulfonic acid (PFHxS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoroheptanesulfonic acid (PFHpS) Eurofins Sacramento Page 13 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-4Client Sample ID: CORMAS-25-S002 Matrix: SolidDate Collected: 04/02/25 11:20 Percent Solids: 78.5Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL 0.28 0.20 0.050 ug/Kg ☼04/09/25 06:19 04/10/25 13:17 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorooctanesulfonic acid (PFOS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorononanesulfonic acid (PFNS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorodecanesulfonic acid (PFDS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorododecanesulfonic acid (PFDoS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.063 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.20 0.075 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 13:17 1☼ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 82.7 8 -130 04/09/25 06:19 04/10/25 13:17 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 140 *5+04/09/25 06:19 04/10/25 13:17 135-130 13C5 PFHxA 91.1 04/09/25 06:19 04/10/25 13:17 140-130 13C4 PFHpA 102 04/09/25 06:19 04/10/25 13:17 140-130 13C8 PFOA 86.3 04/09/25 06:19 04/10/25 13:17 140-130 13C9 PFNA 75.7 04/09/25 06:19 04/10/25 13:17 140-130 13C6 PFDA 63.5 04/09/25 06:19 04/10/25 13:17 140-130 Eurofins Sacramento Page 14 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-4Client Sample ID: CORMAS-25-S002 Matrix: SolidDate Collected: 04/02/25 11:20 Percent Solids: 78.5Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) 13C7 PFUnA 46.4 40 -130 04/09/25 06:19 04/10/25 13:17 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C2 PFDoA 54.9 04/09/25 06:19 04/10/25 13:17 140-130 13C2 PFTeDA 73.7 04/09/25 06:19 04/10/25 13:17 120-130 13C3 PFBS 73.5 04/09/25 06:19 04/10/25 13:17 140-135 13C3 PFHxS 78.8 04/09/25 06:19 04/10/25 13:17 140-130 13C8 PFOS 68.2 04/09/25 06:19 04/10/25 13:17 140-130 13C8 FOSA 54.0 04/09/25 06:19 04/10/25 13:17 140-130 d3-NMeFOSAA 45.6 04/09/25 06:19 04/10/25 13:17 140-135 d5-NEtFOSAA 45.2 04/09/25 06:19 04/10/25 13:17 140-150 13C2 4:2 FTS 182 *5+04/09/25 06:19 04/10/25 13:17 140-165 13C2 6:2 FTS 212 04/09/25 06:19 04/10/25 13:17 140-215 13C2 8:2 FTS 149 04/09/25 06:19 04/10/25 13:17 140-275 13C3 HFPO-DA 93.9 04/09/25 06:19 04/10/25 13:17 140-130 d7-N-MeFOSE-M 42.6 04/09/25 06:19 04/10/25 13:17 120-130 d9-N-EtFOSE-M 41.5 04/09/25 06:19 04/10/25 13:17 115-130 d5-NEtPFOSA 53.5 04/09/25 06:19 04/10/25 13:17 110-130 d3-NMePFOSA 43.4 04/09/25 06:19 04/10/25 13:17 110-130 General Chemistry RL MDL 21 0.10 0.10 %04/08/25 12:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Percent Moisture (EPA 1633) 0.10 0.10 %04/08/25 12:26 179Percent Solids (EPA 1633) Lab Sample ID: 320-120292-5Client Sample ID: CORMAS-25-S004 Matrix: SolidDate Collected: 04/02/25 13:05 Percent Solids: 89.0Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.41 0.10 ug/Kg ☼04/09/25 06:19 04/10/25 13:34 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoropentanoic acid (PFPeA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorohexanoic acid (PFHxA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoroheptanoic acid (PFHpA) 0.20 0.063 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorooctanoic acid (PFOA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorononanoic acid (PFNA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorodecanoic acid (PFDA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoroundecanoic acid (PFUnA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorododecanoic acid (PFDoA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.059 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorobutanesulfonic acid (PFBS) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorohexanesulfonic acid (PFHxS) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoroheptanesulfonic acid (PFHpS) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼0.79Perfluorooctanesulfonic acid (PFOS) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorononanesulfonic acid (PFNS) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorodecanesulfonic acid (PFDS) Eurofins Sacramento Page 15 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-5Client Sample ID: CORMAS-25-S004 Matrix: SolidDate Collected: 04/02/25 13:05 Percent Solids: 89.0Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.20 0.051 ug/Kg ☼04/09/25 06:19 04/10/25 13:34 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorododecanesulfonic acid (PFDoS) 0.41 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.41 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.41 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.064 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 1.0 0.26 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 1.0 0.26 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.063 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.20 0.077 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.051 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.41 0.10 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 1.0 0.26 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 1.0 0.26 ug/Kg 04/09/25 06:19 04/10/25 13:34 1☼ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 79.8 8 -130 04/09/25 06:19 04/10/25 13:34 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 152 *5+04/09/25 06:19 04/10/25 13:34 135-130 13C5 PFHxA 86.9 04/09/25 06:19 04/10/25 13:34 140-130 13C4 PFHpA 93.5 04/09/25 06:19 04/10/25 13:34 140-130 13C8 PFOA 85.7 04/09/25 06:19 04/10/25 13:34 140-130 13C9 PFNA 68.6 04/09/25 06:19 04/10/25 13:34 140-130 13C6 PFDA 61.5 04/09/25 06:19 04/10/25 13:34 140-130 13C7 PFUnA 47.0 04/09/25 06:19 04/10/25 13:34 140-130 13C2 PFDoA 47.0 04/09/25 06:19 04/10/25 13:34 140-130 13C2 PFTeDA 50.1 04/09/25 06:19 04/10/25 13:34 120-130 Eurofins Sacramento Page 16 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-5Client Sample ID: CORMAS-25-S004 Matrix: SolidDate Collected: 04/02/25 13:05 Percent Solids: 89.0Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) 13C3 PFBS 79.9 40 -135 04/09/25 06:19 04/10/25 13:34 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C3 PFHxS 79.5 04/09/25 06:19 04/10/25 13:34 140-130 13C8 PFOS 67.4 04/09/25 06:19 04/10/25 13:34 140-130 13C8 FOSA 64.2 04/09/25 06:19 04/10/25 13:34 140-130 d3-NMeFOSAA 47.1 04/09/25 06:19 04/10/25 13:34 140-135 d5-NEtFOSAA 44.2 04/09/25 06:19 04/10/25 13:34 140-150 13C2 4:2 FTS 184 *5+04/09/25 06:19 04/10/25 13:34 140-165 13C2 6:2 FTS 206 04/09/25 06:19 04/10/25 13:34 140-215 13C2 8:2 FTS 215 04/09/25 06:19 04/10/25 13:34 140-275 13C3 HFPO-DA 92.6 04/09/25 06:19 04/10/25 13:34 140-130 d7-N-MeFOSE-M 31.9 04/09/25 06:19 04/10/25 13:34 120-130 d9-N-EtFOSE-M 27.1 04/09/25 06:19 04/10/25 13:34 115-130 d5-NEtPFOSA 19.0 04/09/25 06:19 04/10/25 13:34 110-130 d3-NMePFOSA 17.1 04/09/25 06:19 04/10/25 13:34 110-130 General Chemistry RL MDL 11 0.10 0.10 %04/08/25 12:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Percent Moisture (EPA 1633) 0.10 0.10 %04/08/25 12:26 189Percent Solids (EPA 1633) Lab Sample ID: 320-120292-6Client Sample ID: CORMAS-25-S001 Matrix: SolidDate Collected: 04/02/25 10:25 Percent Solids: 90.4Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.39 0.098 ug/Kg ☼04/09/25 06:19 04/10/25 13:50 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoropentanoic acid (PFPeA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorohexanoic acid (PFHxA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoroheptanoic acid (PFHpA) 0.20 0.061 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorooctanoic acid (PFOA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorononanoic acid (PFNA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorodecanoic acid (PFDA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoroundecanoic acid (PFUnA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorododecanoic acid (PFDoA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.057 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorobutanesulfonic acid (PFBS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorohexanesulfonic acid (PFHxS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoroheptanesulfonic acid (PFHpS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼0.29Perfluorooctanesulfonic acid (PFOS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorononanesulfonic acid (PFNS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorodecanesulfonic acid (PFDS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorododecanesulfonic acid (PFDoS) 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) Eurofins Sacramento Page 17 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-6Client Sample ID: CORMAS-25-S001 Matrix: SolidDate Collected: 04/02/25 10:25 Percent Solids: 90.4Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.39 0.098 ug/Kg ☼04/09/25 06:19 04/10/25 13:50 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.061 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.20 0.073 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 13:50 1☼ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 88.2 8 -130 04/09/25 06:19 04/10/25 13:50 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 113 04/09/25 06:19 04/10/25 13:50 135-130 13C5 PFHxA 90.5 04/09/25 06:19 04/10/25 13:50 140-130 13C4 PFHpA 89.9 04/09/25 06:19 04/10/25 13:50 140-130 13C8 PFOA 69.9 04/09/25 06:19 04/10/25 13:50 140-130 13C9 PFNA 42.1 04/09/25 06:19 04/10/25 13:50 140-130 13C6 PFDA 41.8 04/09/25 06:19 04/10/25 13:50 140-130 13C7 PFUnA 52.4 04/09/25 06:19 04/10/25 13:50 140-130 13C2 PFDoA 53.7 04/09/25 06:19 04/10/25 13:50 140-130 13C2 PFTeDA 7.33 *5-04/09/25 06:19 04/10/25 13:50 120-130 13C3 PFBS 70.1 04/09/25 06:19 04/10/25 13:50 140-135 13C3 PFHxS 69.9 04/09/25 06:19 04/10/25 13:50 140-130 13C8 PFOS 39.1 *5-04/09/25 06:19 04/10/25 13:50 140-130 13C8 FOSA 45.7 04/09/25 06:19 04/10/25 13:50 140-130 Eurofins Sacramento Page 18 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-6Client Sample ID: CORMAS-25-S001 Matrix: SolidDate Collected: 04/02/25 10:25 Percent Solids: 90.4Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) d3-NMeFOSAA 43.5 40 -135 04/09/25 06:19 04/10/25 13:50 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery d5-NEtFOSAA 43.2 04/09/25 06:19 04/10/25 13:50 140-150 13C2 4:2 FTS 151 04/09/25 06:19 04/10/25 13:50 140-165 13C2 6:2 FTS 123 04/09/25 06:19 04/10/25 13:50 140-215 13C2 8:2 FTS 63.9 04/09/25 06:19 04/10/25 13:50 140-275 13C3 HFPO-DA 91.2 04/09/25 06:19 04/10/25 13:50 140-130 d7-N-MeFOSE-M 43.6 04/09/25 06:19 04/10/25 13:50 120-130 d9-N-EtFOSE-M 40.0 04/09/25 06:19 04/10/25 13:50 115-130 d5-NEtPFOSA 44.2 04/09/25 06:19 04/10/25 13:50 110-130 d3-NMePFOSA 31.7 04/09/25 06:19 04/10/25 13:50 110-130 General Chemistry RL MDL 9.6 0.10 0.10 %04/08/25 12:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Percent Moisture (EPA 1633) 0.10 0.10 %04/08/25 12:26 190Percent Solids (EPA 1633) Lab Sample ID: 320-120292-7Client Sample ID: CORMAS-25-A005 Matrix: SolidDate Collected: 04/02/25 11:57 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.39 0.097 ug/Kg 04/09/25 06:19 04/10/25 14:39 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoropentanoic acid (PFPeA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorohexanoic acid (PFHxA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoroheptanoic acid (PFHpA) 0.19 0.060 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorooctanoic acid (PFOA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorononanoic acid (PFNA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorodecanoic acid (PFDA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoroundecanoic acid (PFUnA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorododecanoic acid (PFDoA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorotridecanoic acid (PFTrDA) 0.19 0.056 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorotetradecanoic acid (PFTeDA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 10.056 JPerfluorobutanesulfonic acid (PFBS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoropentanesulfonic acid (PFPeS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 10.11 JPerfluorohexanesulfonic acid (PFHxS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoroheptanesulfonic acid (PFHpS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 11.4Perfluorooctanesulfonic acid (PFOS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorononanesulfonic acid (PFNS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorodecanesulfonic acid (PFDS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorododecanesulfonic acid (PFDoS) 0.39 0.097 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.39 0.097 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) Eurofins Sacramento Page 19 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-7Client Sample ID: CORMAS-25-A005 Matrix: SolidDate Collected: 04/02/25 11:57 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.39 0.097 ug/Kg 04/09/25 06:19 04/10/25 14:39 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.19 0.061 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluorooctanesulfonamide (PFOSA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 0.97 0.24 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 0.97 0.24 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.19 0.060 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.19 0.073 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.19 0.049 ug/Kg 04/09/25 06:19 04/10/25 14:39 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.39 0.097 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 0.97 0.24 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 0.97 0.24 ug/Kg 04/09/25 06:19 04/10/25 14:39 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 83.2 8 -130 04/09/25 06:19 04/10/25 14:39 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 134 *5+04/09/25 06:19 04/10/25 14:39 135-130 13C5 PFHxA 90.8 04/09/25 06:19 04/10/25 14:39 140-130 13C4 PFHpA 95.6 04/09/25 06:19 04/10/25 14:39 140-130 13C8 PFOA 86.5 04/09/25 06:19 04/10/25 14:39 140-130 13C9 PFNA 79.8 04/09/25 06:19 04/10/25 14:39 140-130 13C6 PFDA 91.2 04/09/25 06:19 04/10/25 14:39 140-130 13C7 PFUnA 76.8 04/09/25 06:19 04/10/25 14:39 140-130 13C2 PFDoA 70.4 04/09/25 06:19 04/10/25 14:39 140-130 13C2 PFTeDA 63.8 04/09/25 06:19 04/10/25 14:39 120-130 13C3 PFBS 73.1 04/09/25 06:19 04/10/25 14:39 140-135 13C3 PFHxS 75.1 04/09/25 06:19 04/10/25 14:39 140-130 13C8 PFOS 73.0 04/09/25 06:19 04/10/25 14:39 140-130 13C8 FOSA 84.2 04/09/25 06:19 04/10/25 14:39 140-130 d3-NMeFOSAA 66.2 04/09/25 06:19 04/10/25 14:39 140-135 d5-NEtFOSAA 63.0 04/09/25 06:19 04/10/25 14:39 140-150 Eurofins Sacramento Page 20 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-7Client Sample ID: CORMAS-25-A005 Matrix: SolidDate Collected: 04/02/25 11:57 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) 13C2 4:2 FTS 171 *5+40 -165 04/09/25 06:19 04/10/25 14:39 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C2 6:2 FTS 169 04/09/25 06:19 04/10/25 14:39 140-215 13C2 8:2 FTS 223 04/09/25 06:19 04/10/25 14:39 140-275 13C3 HFPO-DA 93.6 04/09/25 06:19 04/10/25 14:39 140-130 d7-N-MeFOSE-M 49.9 04/09/25 06:19 04/10/25 14:39 120-130 d9-N-EtFOSE-M 39.0 04/09/25 06:19 04/10/25 14:39 115-130 d5-NEtPFOSA 17.0 04/09/25 06:19 04/10/25 14:39 110-130 d3-NMePFOSA 18.2 04/09/25 06:19 04/10/25 14:39 110-130 Lab Sample ID: 320-120292-8Client Sample ID: CORMAS-25-A003 Matrix: SolidDate Collected: 04/02/25 11:57 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 14:56 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoropentanoic acid (PFPeA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorohexanoic acid (PFHxA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoroheptanoic acid (PFHpA) 0.20 0.061 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorooctanoic acid (PFOA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorononanoic acid (PFNA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorodecanoic acid (PFDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoroundecanoic acid (PFUnA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorododecanoic acid (PFDoA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.057 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 10.063 JPerfluorobutanesulfonic acid (PFBS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 10.11 JPerfluorohexanesulfonic acid (PFHxS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoroheptanesulfonic acid (PFHpS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 11.4Perfluorooctanesulfonic acid (PFOS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorononanesulfonic acid (PFNS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorodecanesulfonic acid (PFDS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorododecanesulfonic acid (PFDoS) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) Eurofins Sacramento Page 21 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-8Client Sample ID: CORMAS-25-A003 Matrix: SolidDate Collected: 04/02/25 11:57 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier N-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.061 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.20 0.074 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 14:56 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.40 0.099 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 0.99 0.25 ug/Kg 04/09/25 06:19 04/10/25 14:56 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 87.7 8 -130 04/09/25 06:19 04/10/25 14:56 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 136 *5+04/09/25 06:19 04/10/25 14:56 135-130 13C5 PFHxA 90.0 04/09/25 06:19 04/10/25 14:56 140-130 13C4 PFHpA 88.6 04/09/25 06:19 04/10/25 14:56 140-130 13C8 PFOA 93.8 04/09/25 06:19 04/10/25 14:56 140-130 13C9 PFNA 81.3 04/09/25 06:19 04/10/25 14:56 140-130 13C6 PFDA 86.8 04/09/25 06:19 04/10/25 14:56 140-130 13C7 PFUnA 70.7 04/09/25 06:19 04/10/25 14:56 140-130 13C2 PFDoA 65.8 04/09/25 06:19 04/10/25 14:56 140-130 13C2 PFTeDA 58.3 04/09/25 06:19 04/10/25 14:56 120-130 13C3 PFBS 76.3 04/09/25 06:19 04/10/25 14:56 140-135 13C3 PFHxS 76.3 04/09/25 06:19 04/10/25 14:56 140-130 13C8 PFOS 75.1 04/09/25 06:19 04/10/25 14:56 140-130 13C8 FOSA 80.4 04/09/25 06:19 04/10/25 14:56 140-130 d3-NMeFOSAA 66.9 04/09/25 06:19 04/10/25 14:56 140-135 d5-NEtFOSAA 63.3 04/09/25 06:19 04/10/25 14:56 140-150 13C2 4:2 FTS 188 *5+04/09/25 06:19 04/10/25 14:56 140-165 13C2 6:2 FTS 181 04/09/25 06:19 04/10/25 14:56 140-215 13C2 8:2 FTS 234 04/09/25 06:19 04/10/25 14:56 140-275 13C3 HFPO-DA 91.2 04/09/25 06:19 04/10/25 14:56 140-130 d7-N-MeFOSE-M 50.4 04/09/25 06:19 04/10/25 14:56 120-130 d9-N-EtFOSE-M 40.6 04/09/25 06:19 04/10/25 14:56 115-130 d5-NEtPFOSA 17.5 04/09/25 06:19 04/10/25 14:56 110-130 d3-NMePFOSA 18.2 04/09/25 06:19 04/10/25 14:56 110-130 Eurofins Sacramento Page 22 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-9Client Sample ID: CORMAS-25-S005 Matrix: SolidDate Collected: 04/02/25 14:00 Percent Solids: 75.7Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.40 0.10 ug/Kg ☼04/09/25 06:19 04/10/25 15:12 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoropentanoic acid (PFPeA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorohexanoic acid (PFHxA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoroheptanoic acid (PFHpA) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼0.081 JPerfluorooctanoic acid (PFOA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼0.050 J IPerfluorononanoic acid (PFNA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorodecanoic acid (PFDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoroundecanoic acid (PFUnA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorododecanoic acid (PFDoA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.058 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorobutanesulfonic acid (PFBS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼0.078 JPerfluorohexanesulfonic acid (PFHxS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoroheptanesulfonic acid (PFHpS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼0.40Perfluorooctanesulfonic acid (PFOS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorononanesulfonic acid (PFNS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorodecanesulfonic acid (PFDS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorododecanesulfonic acid (PFDoS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.063 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.062 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) Eurofins Sacramento Page 23 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-9Client Sample ID: CORMAS-25-S005 Matrix: SolidDate Collected: 04/02/25 14:00 Percent Solids: 75.7Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.20 0.050 ug/Kg ☼04/09/25 06:19 04/10/25 15:12 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 0.20 0.075 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 1.0 0.25 ug/Kg 04/09/25 06:19 04/10/25 15:12 1☼ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 76.3 8 -130 04/09/25 06:19 04/10/25 15:12 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 153 *5+04/09/25 06:19 04/10/25 15:12 135-130 13C5 PFHxA 82.7 04/09/25 06:19 04/10/25 15:12 140-130 13C4 PFHpA 93.7 04/09/25 06:19 04/10/25 15:12 140-130 13C8 PFOA 85.5 04/09/25 06:19 04/10/25 15:12 140-130 13C9 PFNA 78.7 04/09/25 06:19 04/10/25 15:12 140-130 13C6 PFDA 75.6 04/09/25 06:19 04/10/25 15:12 140-130 13C7 PFUnA 56.8 04/09/25 06:19 04/10/25 15:12 140-130 13C2 PFDoA 63.4 04/09/25 06:19 04/10/25 15:12 140-130 13C2 PFTeDA 77.6 04/09/25 06:19 04/10/25 15:12 120-130 13C3 PFBS 72.8 04/09/25 06:19 04/10/25 15:12 140-135 13C3 PFHxS 80.1 04/09/25 06:19 04/10/25 15:12 140-130 13C8 PFOS 71.2 04/09/25 06:19 04/10/25 15:12 140-130 13C8 FOSA 60.9 04/09/25 06:19 04/10/25 15:12 140-130 d3-NMeFOSAA 45.5 04/09/25 06:19 04/10/25 15:12 140-135 d5-NEtFOSAA 47.1 04/09/25 06:19 04/10/25 15:12 140-150 13C2 4:2 FTS 169 *5+04/09/25 06:19 04/10/25 15:12 140-165 13C2 6:2 FTS 221 *5+04/09/25 06:19 04/10/25 15:12 140-215 13C2 8:2 FTS 157 04/09/25 06:19 04/10/25 15:12 140-275 13C3 HFPO-DA 94.8 04/09/25 06:19 04/10/25 15:12 140-130 d7-N-MeFOSE-M 41.9 04/09/25 06:19 04/10/25 15:12 120-130 d9-N-EtFOSE-M 40.3 04/09/25 06:19 04/10/25 15:12 115-130 d5-NEtPFOSA 46.4 04/09/25 06:19 04/10/25 15:12 110-130 d3-NMePFOSA 40.9 04/09/25 06:19 04/10/25 15:12 110-130 General Chemistry RL MDL 24 0.10 0.10 %04/08/25 12:26 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Percent Moisture (EPA 1633) 0.10 0.10 %04/08/25 12:26 176Percent Solids (EPA 1633) Lab Sample ID: 320-120292-10Client Sample ID: CORMAS-25-A004 Matrix: SolidDate Collected: 04/02/25 13:00 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 15:29 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoropentanoic acid (PFPeA) Eurofins Sacramento Page 24 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-10Client Sample ID: CORMAS-25-A004 Matrix: SolidDate Collected: 04/02/25 13:00 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorohexanoic acid (PFHxA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoroheptanoic acid (PFHpA) 0.20 0.060 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorooctanoic acid (PFOA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorononanoic acid (PFNA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorodecanoic acid (PFDA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoroundecanoic acid (PFUnA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorododecanoic acid (PFDoA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorotridecanoic acid (PFTrDA) 0.20 0.057 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorotetradecanoic acid (PFTeDA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 10.11 JPerfluorobutanesulfonic acid (PFBS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoropentanesulfonic acid (PFPeS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 10.16 JPerfluorohexanesulfonic acid (PFHxS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoroheptanesulfonic acid (PFHpS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 11.9Perfluorooctanesulfonic acid (PFOS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorononanesulfonic acid (PFNS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 10.060 JPerfluorodecanesulfonic acid (PFDS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorododecanesulfonic acid (PFDoS) 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.20 0.061 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluorooctanesulfonamide (PFOSA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.20 0.060 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) Eurofins Sacramento Page 25 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-10Client Sample ID: CORMAS-25-A004 Matrix: SolidDate Collected: 04/02/25 13:00 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 0.20 0.073 ug/Kg 04/09/25 06:19 04/10/25 15:29 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier 11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 0.20 0.049 ug/Kg 04/09/25 06:19 04/10/25 15:29 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.39 0.098 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 0.98 0.24 ug/Kg 04/09/25 06:19 04/10/25 15:29 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 92.9 8 -130 04/09/25 06:19 04/10/25 15:29 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 105 04/09/25 06:19 04/10/25 15:29 135-130 13C5 PFHxA 90.0 04/09/25 06:19 04/10/25 15:29 140-130 13C4 PFHpA 88.4 04/09/25 06:19 04/10/25 15:29 140-130 13C8 PFOA 91.2 04/09/25 06:19 04/10/25 15:29 140-130 13C9 PFNA 80.3 04/09/25 06:19 04/10/25 15:29 140-130 13C6 PFDA 87.7 04/09/25 06:19 04/10/25 15:29 140-130 13C7 PFUnA 82.4 04/09/25 06:19 04/10/25 15:29 140-130 13C2 PFDoA 81.0 04/09/25 06:19 04/10/25 15:29 140-130 13C2 PFTeDA 65.9 04/09/25 06:19 04/10/25 15:29 120-130 13C3 PFBS 68.8 04/09/25 06:19 04/10/25 15:29 140-135 13C3 PFHxS 67.9 04/09/25 06:19 04/10/25 15:29 140-130 13C8 PFOS 67.5 04/09/25 06:19 04/10/25 15:29 140-130 13C8 FOSA 70.2 04/09/25 06:19 04/10/25 15:29 140-130 d3-NMeFOSAA 61.7 04/09/25 06:19 04/10/25 15:29 140-135 d5-NEtFOSAA 64.1 04/09/25 06:19 04/10/25 15:29 140-150 13C2 4:2 FTS 128 04/09/25 06:19 04/10/25 15:29 140-165 13C2 6:2 FTS 122 04/09/25 06:19 04/10/25 15:29 140-215 13C2 8:2 FTS 159 04/09/25 06:19 04/10/25 15:29 140-275 13C3 HFPO-DA 98.2 04/09/25 06:19 04/10/25 15:29 140-130 d7-N-MeFOSE-M 61.9 04/09/25 06:19 04/10/25 15:29 120-130 d9-N-EtFOSE-M 49.0 04/09/25 06:19 04/10/25 15:29 115-130 d5-NEtPFOSA 24.2 04/09/25 06:19 04/10/25 15:29 110-130 d3-NMePFOSA 25.4 04/09/25 06:19 04/10/25 15:29 110-130 Lab Sample ID: 320-120292-11Client Sample ID: CORMAS-25-W003 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:21 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoropentanoic acid (PFPeA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorohexanoic acid (PFHxA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoroheptanoic acid (PFHpA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorooctanoic acid (PFOA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorononanoic acid (PFNA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorodecanoic acid (PFDA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoroundecanoic acid (PFUnA) 1.8 0.49 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorododecanoic acid (PFDoA) Eurofins Sacramento Page 26 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-11Client Sample ID: CORMAS-25-W003 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 1.8 0.51 ng/L 04/04/25 11:20 04/08/25 13:21 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorotridecanoic acid (PFTrDA) 1.8 0.72 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorotetradecanoic acid (PFTeDA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorobutanesulfonic acid (PFBS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoropentanesulfonic acid (PFPeS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorohexanesulfonic acid (PFHxS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoroheptanesulfonic acid (PFHpS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorooctanesulfonic acid (PFOS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorononanesulfonic acid (PFNS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorodecanesulfonic acid (PFDS) 1.8 0.47 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorododecanesulfonic acid (PFDoS) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:21 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:21 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:21 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluorooctanesulfonamide (PFOSA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:21 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:21 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 1.3 0.34 ng/L 04/04/25 11:20 04/08/25 13:21 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 1.8 0.64 ng/L 04/04/25 11:20 04/08/25 13:21 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 1.8 0.51 ng/L 04/04/25 11:20 04/08/25 13:21 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:21 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:21 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:21 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:21 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) Eurofins Sacramento Page 27 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-11Client Sample ID: CORMAS-25-W003 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 13C4 PFBA 118 5 -130 04/04/25 11:20 04/08/25 13:21 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 116 04/04/25 11:20 04/08/25 13:21 140-130 13C5 PFHxA 112 04/04/25 11:20 04/08/25 13:21 140-130 13C4 PFHpA 113 04/04/25 11:20 04/08/25 13:21 140-130 13C8 PFOA 104 04/04/25 11:20 04/08/25 13:21 140-130 13C9 PFNA 98.6 04/04/25 11:20 04/08/25 13:21 140-130 13C6 PFDA 107 04/04/25 11:20 04/08/25 13:21 140-130 13C7 PFUnA 115 04/04/25 11:20 04/08/25 13:21 130-130 13C2 PFDoA 97.8 04/04/25 11:20 04/08/25 13:21 110-130 13C2 PFTeDA 71.4 04/04/25 11:20 04/08/25 13:21 110-130 13C3 PFBS 85.2 04/04/25 11:20 04/08/25 13:21 140-135 13C3 PFHxS 89.0 04/04/25 11:20 04/08/25 13:21 140-130 13C8 PFOS 80.9 04/04/25 11:20 04/08/25 13:21 140-130 13C8 FOSA 67.0 04/04/25 11:20 04/08/25 13:21 140-130 d3-NMeFOSAA 90.1 04/04/25 11:20 04/08/25 13:21 140-170 d5-NEtFOSAA 89.5 04/04/25 11:20 04/08/25 13:21 125-135 13C2 4:2 FTS 95.2 04/04/25 11:20 04/08/25 13:21 140-200 13C2 6:2 FTS 96.2 04/04/25 11:20 04/08/25 13:21 140-200 13C2 8:2 FTS 101 04/04/25 11:20 04/08/25 13:21 140-300 13C3 HFPO-DA 131 *5+04/04/25 11:20 04/08/25 13:21 140-130 d7-N-MeFOSE-M 65.0 04/04/25 11:20 04/08/25 13:21 110-130 d9-N-EtFOSE-M 62.2 04/04/25 11:20 04/08/25 13:21 110-130 d5-NEtPFOSA 62.1 04/04/25 11:20 04/08/25 13:21 110-130 d3-NMePFOSA 52.5 04/04/25 11:20 04/08/25 13:21 110-130 Lab Sample ID: 320-120292-12Client Sample ID: CORMAS-25-W004 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:37 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoropentanoic acid (PFPeA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorohexanoic acid (PFHxA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoroheptanoic acid (PFHpA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorooctanoic acid (PFOA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorononanoic acid (PFNA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorodecanoic acid (PFDA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoroundecanoic acid (PFUnA) 1.8 0.48 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorododecanoic acid (PFDoA) 1.8 0.51 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorotridecanoic acid (PFTrDA) 1.8 0.71 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorotetradecanoic acid (PFTeDA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorobutanesulfonic acid (PFBS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoropentanesulfonic acid (PFPeS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorohexanesulfonic acid (PFHxS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoroheptanesulfonic acid (PFHpS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorooctanesulfonic acid (PFOS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorononanesulfonic acid (PFNS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorodecanesulfonic acid (PFDS) Eurofins Sacramento Page 28 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-12Client Sample ID: CORMAS-25-W004 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 1.8 0.46 ng/L 04/04/25 11:20 04/08/25 13:37 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorododecanesulfonic acid (PFDoS) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:37 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:37 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:37 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluorooctanesulfonamide (PFOSA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:37 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:37 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 1.3 0.34 ng/L 04/04/25 11:20 04/08/25 13:37 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 1.8 0.63 ng/L 04/04/25 11:20 04/08/25 13:37 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 1.8 0.51 ng/L 04/04/25 11:20 04/08/25 13:37 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 1.8 0.44 ng/L 04/04/25 11:20 04/08/25 13:37 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 3.5 0.88 ng/L 04/04/25 11:20 04/08/25 13:37 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:37 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 8.8 2.2 ng/L 04/04/25 11:20 04/08/25 13:37 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 114 5 -130 04/04/25 11:20 04/08/25 13:37 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 107 04/04/25 11:20 04/08/25 13:37 140-130 13C5 PFHxA 98.1 04/04/25 11:20 04/08/25 13:37 140-130 13C4 PFHpA 106 04/04/25 11:20 04/08/25 13:37 140-130 13C8 PFOA 95.1 04/04/25 11:20 04/08/25 13:37 140-130 13C9 PFNA 99.3 04/04/25 11:20 04/08/25 13:37 140-130 13C6 PFDA 104 04/04/25 11:20 04/08/25 13:37 140-130 13C7 PFUnA 108 04/04/25 11:20 04/08/25 13:37 130-130 13C2 PFDoA 90.0 04/04/25 11:20 04/08/25 13:37 110-130 13C2 PFTeDA 69.1 04/04/25 11:20 04/08/25 13:37 110-130 Eurofins Sacramento Page 29 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-12Client Sample ID: CORMAS-25-W004 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) 13C3 PFBS 86.1 40 -135 04/04/25 11:20 04/08/25 13:37 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C3 PFHxS 89.2 04/04/25 11:20 04/08/25 13:37 140-130 13C8 PFOS 84.2 04/04/25 11:20 04/08/25 13:37 140-130 13C8 FOSA 66.5 04/04/25 11:20 04/08/25 13:37 140-130 d3-NMeFOSAA 87.1 04/04/25 11:20 04/08/25 13:37 140-170 d5-NEtFOSAA 77.1 04/04/25 11:20 04/08/25 13:37 125-135 13C2 4:2 FTS 103 04/04/25 11:20 04/08/25 13:37 140-200 13C2 6:2 FTS 101 04/04/25 11:20 04/08/25 13:37 140-200 13C2 8:2 FTS 95.7 04/04/25 11:20 04/08/25 13:37 140-300 13C3 HFPO-DA 121 04/04/25 11:20 04/08/25 13:37 140-130 d7-N-MeFOSE-M 70.8 04/04/25 11:20 04/08/25 13:37 110-130 d9-N-EtFOSE-M 72.2 04/04/25 11:20 04/08/25 13:37 110-130 d5-NEtPFOSA 63.6 04/04/25 11:20 04/08/25 13:37 110-130 d3-NMePFOSA 54.0 04/04/25 11:20 04/08/25 13:37 110-130 Lab Sample ID: 320-120292-13Client Sample ID: CORMAS-25-W002 Matrix: WaterDate Collected: 04/02/25 10:25 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 4.4 1.1 ng/L 04/04/25 11:20 04/08/25 13:53 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoropentanoic acid (PFPeA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorohexanoic acid (PFHxA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoroheptanoic acid (PFHpA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorooctanoic acid (PFOA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorononanoic acid (PFNA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorodecanoic acid (PFDA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoroundecanoic acid (PFUnA) 2.2 0.60 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorododecanoic acid (PFDoA) 2.2 0.63 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorotridecanoic acid (PFTrDA) 2.2 0.89 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorotetradecanoic acid (PFTeDA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorobutanesulfonic acid (PFBS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoropentanesulfonic acid (PFPeS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorohexanesulfonic acid (PFHxS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoroheptanesulfonic acid (PFHpS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorooctanesulfonic acid (PFOS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorononanesulfonic acid (PFNS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorodecanesulfonic acid (PFDS) 2.2 0.58 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorododecanesulfonic acid (PFDoS) 4.4 1.1 ng/L 04/04/25 11:20 04/08/25 13:53 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 4.4 1.1 ng/L 04/04/25 11:20 04/08/25 13:53 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 4.4 1.1 ng/L 04/04/25 11:20 04/08/25 13:53 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluorooctanesulfonamide (PFOSA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) Eurofins Sacramento Page 30 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-13Client Sample ID: CORMAS-25-W002 Matrix: WaterDate Collected: 04/02/25 10:25 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier N-ethylperfluorooctane sulfonamide (NEtFOSA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 11 2.7 ng/L 04/04/25 11:20 04/08/25 13:53 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 11 2.7 ng/L 04/04/25 11:20 04/08/25 13:53 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 1.6 0.43 ng/L 04/04/25 11:20 04/08/25 13:53 1NDHexafluoropropylene Oxide Dimer Acid (HFPO-DA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 2.2 0.79 ng/L 04/04/25 11:20 04/08/25 13:53 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 2.2 0.63 ng/L 04/04/25 11:20 04/08/25 13:53 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 2.2 0.55 ng/L 04/04/25 11:20 04/08/25 13:53 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 4.4 1.1 ng/L 04/04/25 11:20 04/08/25 13:53 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 11 2.7 ng/L 04/04/25 11:20 04/08/25 13:53 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 11 2.7 ng/L 04/04/25 11:20 04/08/25 13:53 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 112 5 -130 04/04/25 11:20 04/08/25 13:53 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 102 04/04/25 11:20 04/08/25 13:53 140-130 13C5 PFHxA 99.5 04/04/25 11:20 04/08/25 13:53 140-130 13C4 PFHpA 106 04/04/25 11:20 04/08/25 13:53 140-130 13C8 PFOA 103 04/04/25 11:20 04/08/25 13:53 140-130 13C9 PFNA 101 04/04/25 11:20 04/08/25 13:53 140-130 13C6 PFDA 100 04/04/25 11:20 04/08/25 13:53 140-130 13C7 PFUnA 104 04/04/25 11:20 04/08/25 13:53 130-130 13C2 PFDoA 97.9 04/04/25 11:20 04/08/25 13:53 110-130 13C2 PFTeDA 70.9 04/04/25 11:20 04/08/25 13:53 110-130 13C3 PFBS 80.3 04/04/25 11:20 04/08/25 13:53 140-135 13C3 PFHxS 85.7 04/04/25 11:20 04/08/25 13:53 140-130 13C8 PFOS 85.0 04/04/25 11:20 04/08/25 13:53 140-130 13C8 FOSA 66.6 04/04/25 11:20 04/08/25 13:53 140-130 d3-NMeFOSAA 84.8 04/04/25 11:20 04/08/25 13:53 140-170 d5-NEtFOSAA 75.5 04/04/25 11:20 04/08/25 13:53 125-135 13C2 4:2 FTS 87.1 04/04/25 11:20 04/08/25 13:53 140-200 13C2 6:2 FTS 82.7 04/04/25 11:20 04/08/25 13:53 140-200 13C2 8:2 FTS 106 04/04/25 11:20 04/08/25 13:53 140-300 13C3 HFPO-DA 115 04/04/25 11:20 04/08/25 13:53 140-130 Eurofins Sacramento Page 31 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-13Client Sample ID: CORMAS-25-W002 Matrix: WaterDate Collected: 04/02/25 10:25 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) d7-N-MeFOSE-M 67.6 10 -130 04/04/25 11:20 04/08/25 13:53 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery d9-N-EtFOSE-M 69.4 04/04/25 11:20 04/08/25 13:53 110-130 d5-NEtPFOSA 65.6 04/04/25 11:20 04/08/25 13:53 110-130 d3-NMePFOSA 53.5 04/04/25 11:20 04/08/25 13:53 110-130 Lab Sample ID: 320-120292-14Client Sample ID: CORMAS-25-W001 Matrix: WaterDate Collected: 04/02/25 09:00 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS RL MDL ND 4.9 1.2 ng/L 04/04/25 11:20 04/08/25 14:10 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Perfluorobutanoic acid (PFBA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoropentanoic acid (PFPeA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorohexanoic acid (PFHxA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoroheptanoic acid (PFHpA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorooctanoic acid (PFOA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorononanoic acid (PFNA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorodecanoic acid (PFDA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoroundecanoic acid (PFUnA) 2.5 0.67 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorododecanoic acid (PFDoA) 2.5 0.71 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorotridecanoic acid (PFTrDA) 2.5 0.99 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorotetradecanoic acid (PFTeDA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorobutanesulfonic acid (PFBS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoropentanesulfonic acid (PFPeS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorohexanesulfonic acid (PFHxS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoroheptanesulfonic acid (PFHpS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorooctanesulfonic acid (PFOS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorononanesulfonic acid (PFNS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorodecanesulfonic acid (PFDS) 2.5 0.65 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorododecanesulfonic acid (PFDoS) 4.9 1.2 ng/L 04/04/25 11:20 04/08/25 14:10 1ND1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 4.9 1.2 ng/L 04/04/25 11:20 04/08/25 14:10 1ND1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 4.9 1.2 ng/L 04/04/25 11:20 04/08/25 14:10 1ND1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluorooctanesulfonamide (PFOSA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDN-methylperfluorooctane sulfonamide (NMeFOSA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDN-ethylperfluorooctane sulfonamide (NEtFOSA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDN-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDN-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) 12 3.1 ng/L 04/04/25 11:20 04/08/25 14:10 1NDN-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 12 3.1 ng/L 04/04/25 11:20 04/08/25 14:10 1NDN-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) Eurofins Sacramento Page 32 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Client Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Lab Sample ID: 320-120292-14Client Sample ID: CORMAS-25-W001 Matrix: WaterDate Collected: 04/02/25 09:00 Date Received: 04/03/25 09:15 Method: EPA 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) RL MDL ND 1.8 0.48 ng/L 04/04/25 11:20 04/08/25 14:10 1 Analyte Dil FacAnalyzedPreparedUnitDResultQualifier Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1ND4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoro-3-methoxypropanoic acid (PFMPA) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoro-4-methoxybutanoic acid (PFMBA) 2.5 0.88 ng/L 04/04/25 11:20 04/08/25 14:10 1NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 2.5 0.71 ng/L 04/04/25 11:20 04/08/25 14:10 1ND9-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1ND11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) 2.5 0.61 ng/L 04/04/25 11:20 04/08/25 14:10 1NDPerfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 4.9 1.2 ng/L 04/04/25 11:20 04/08/25 14:10 1ND3-Perfluoropropylpropanoic acid (3:3 FTCA) 12 3.1 ng/L 04/04/25 11:20 04/08/25 14:10 1ND3-Perfluoropentylpropanoic acid (5:3 FTCA) 12 3.1 ng/L 04/04/25 11:20 04/08/25 14:10 1ND3-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 111 5 -130 04/04/25 11:20 04/08/25 14:10 1 Isotope Dilution Dil FacAnalyzedPreparedQualifierLimits%Recovery 13C5 PFPeA 105 04/04/25 11:20 04/08/25 14:10 140-130 13C5 PFHxA 103 04/04/25 11:20 04/08/25 14:10 140-130 13C4 PFHpA 102 04/04/25 11:20 04/08/25 14:10 140-130 13C8 PFOA 104 04/04/25 11:20 04/08/25 14:10 140-130 13C9 PFNA 101 04/04/25 11:20 04/08/25 14:10 140-130 13C6 PFDA 113 04/04/25 11:20 04/08/25 14:10 140-130 13C7 PFUnA 110 04/04/25 11:20 04/08/25 14:10 130-130 13C2 PFDoA 102 04/04/25 11:20 04/08/25 14:10 110-130 13C2 PFTeDA 78.3 04/04/25 11:20 04/08/25 14:10 110-130 13C3 PFBS 90.4 04/04/25 11:20 04/08/25 14:10 140-135 13C3 PFHxS 89.9 04/04/25 11:20 04/08/25 14:10 140-130 13C8 PFOS 79.5 04/04/25 11:20 04/08/25 14:10 140-130 13C8 FOSA 66.9 04/04/25 11:20 04/08/25 14:10 140-130 d3-NMeFOSAA 77.5 04/04/25 11:20 04/08/25 14:10 140-170 d5-NEtFOSAA 70.6 04/04/25 11:20 04/08/25 14:10 125-135 13C2 4:2 FTS 103 04/04/25 11:20 04/08/25 14:10 140-200 13C2 6:2 FTS 108 04/04/25 11:20 04/08/25 14:10 140-200 13C2 8:2 FTS 116 04/04/25 11:20 04/08/25 14:10 140-300 13C3 HFPO-DA 119 04/04/25 11:20 04/08/25 14:10 140-130 d7-N-MeFOSE-M 61.8 04/04/25 11:20 04/08/25 14:10 110-130 d9-N-EtFOSE-M 61.4 04/04/25 11:20 04/08/25 14:10 110-130 d5-NEtPFOSA 66.6 04/04/25 11:20 04/08/25 14:10 110-130 d3-NMePFOSA 56.0 04/04/25 11:20 04/08/25 14:10 110-130 Eurofins Sacramento Page 33 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Isotope Dilution Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS Prep Type: Total/NAMatrix: Solid Lab Sample ID Client Sample ID (8-130)(35-130)(40-130)(40-130)(40-130)(40-130)(40-130)(40-130) PFBA PFPeA 13C5PHA C4PFHA C8PFOA C9PFNA C6PFDA 13C7PUA 87.6 110 102 95.1 86.7 88.9 82.7 75.4320-120292-1 Percent Isotope Dilution Recovery (Acceptance Limits) CORMAS-25-A001 91.0 121 103 89.693.6 85.9 87.4 81.7320-120292-2 CORMAS-25-A002 85.7 127 91.4 82.896.9 56.2 44.6 39.7 *5-320-120292-3 CORMAS-25-S003 82.7 140 *5+91.1 86.3102 75.7 63.5 46.4320-120292-4 CORMAS-25-S002 79.8 152 *5+86.9 85.793.5 68.6 61.5 47.0320-120292-5 CORMAS-25-S004 88.2 113 90.5 69.989.9 42.1 41.8 52.4320-120292-6 CORMAS-25-S001 83.2 134 *5+90.8 86.595.6 79.8 91.2 76.8320-120292-7 CORMAS-25-A005 87.7 136 *5+90.0 93.888.6 81.3 86.8 70.7320-120292-8 CORMAS-25-A003 76.3 153 *5+82.7 85.593.7 78.7 75.6 56.8320-120292-9 CORMAS-25-S005 92.9 105 90.0 91.288.4 80.3 87.7 82.4320-120292-10 CORMAS-25-A004 95.7 99.3 94.9 89.4103 84.9 96.7 85.9LCS 320-844949/3-A Lab Control Sample 97.1 104 91.7 98.0101 91.2 93.5 83.0LCSD 320-844949/4-A Lab Control Sample Dup 103 116 109 95.8120 88.9 89.3 80.7LLCS 320-844949/2-A Lab Control Sample 103 106 93.1 95.0104 90.3 91.9 80.7MB 320-844949/1-A Method Blank Lab Sample ID Client Sample ID (40-130)(20-130)(40-135)(40-130)(40-130)(40-130)(40-135)(40-150) PFDoA PFTDA C3PFBS C3PFHS C8PFOS PFOSA d3NMFOS d5NEFOS 77.5 72.8 73.6 74.0 67.1 66.0 55.6 57.2320-120292-1 Percent Isotope Dilution Recovery (Acceptance Limits) CORMAS-25-A001 81.7 68.8 77.9 69.175.9 68.4 59.2 59.3320-120292-2 CORMAS-25-A002 40.5 16.1 *5-74.7 50.578.9 54.5 26.7 *5-24.3 *5-320-120292-3 CORMAS-25-S003 54.9 73.7 73.5 68.278.8 54.0 45.6 45.2320-120292-4 CORMAS-25-S002 47.0 50.1 79.9 67.479.5 64.2 47.1 44.2320-120292-5 CORMAS-25-S004 53.7 7.33 *5-70.1 39.1 *5-69.9 45.7 43.5 43.2320-120292-6 CORMAS-25-S001 70.4 63.8 73.1 73.075.1 84.2 66.2 63.0320-120292-7 CORMAS-25-A005 65.8 58.3 76.3 75.176.3 80.4 66.9 63.3320-120292-8 CORMAS-25-A003 63.4 77.6 72.8 71.280.1 60.9 45.5 47.1320-120292-9 CORMAS-25-S005 81.0 65.9 68.8 67.567.9 70.2 61.7 64.1320-120292-10 CORMAS-25-A004 82.3 76.6 78.1 90.281.6 71.4 70.4 65.7LCS 320-844949/3-A Lab Control Sample 81.8 69.9 79.8 84.981.1 73.0 76.5 70.3LCSD 320-844949/4-A Lab Control Sample Dup 78.5 67.5 79.3 85.882.0 72.8 72.0 67.8LLCS 320-844949/2-A Lab Control Sample 81.9 77.5 78.0 87.881.7 71.2 68.3 63.3MB 320-844949/1-A Method Blank Lab Sample ID Client Sample ID (40-165)(40-215)(40-275)(40-130)(20-130)(15-130)(10-130)(10-130) M242FTS M262FTS M282FTS HFPODA NMFM NEFM d5NPFSA d3NMFSA 129 115 157 97.1 57.7 42.6 23.8 22.9320-120292-1 Percent Isotope Dilution Recovery (Acceptance Limits) CORMAS-25-A001 155 142 196 60.995.8 43.8 22.4 22.7320-120292-2 CORMAS-25-A002 182 *5+154 74.4 55.685.1 57.6 65.2 52.2320-120292-3 CORMAS-25-S003 182 *5+212 149 42.693.9 41.5 53.5 43.4320-120292-4 CORMAS-25-S002 184 *5+206 215 31.992.6 27.1 19.0 17.1320-120292-5 CORMAS-25-S004 151 123 63.9 43.691.2 40.0 44.2 31.7320-120292-6 CORMAS-25-S001 171 *5+169 223 49.993.6 39.0 17.0 18.2320-120292-7 CORMAS-25-A005 188 *5+181 234 50.491.2 40.6 17.5 18.2320-120292-8 CORMAS-25-A003 169 *5+221 *5+157 41.994.8 40.3 46.4 40.9320-120292-9 CORMAS-25-S005 128 122 159 61.998.2 49.0 24.2 25.4320-120292-10 CORMAS-25-A004 106 113 109 70.295.0 70.2 47.7 38.4LCS 320-844949/3-A Lab Control Sample 113 115 109 63.2101 62.6 32.0 27.1LCSD 320-844949/4-A Lab Control Sample Dup 117 121 113 71.7106 70.7 41.6 33.8LLCS 320-844949/2-A Lab Control Sample 109 120 117 72.0105 69.8 50.9 41.9MB 320-844949/1-A Method Blank Eurofins Sacramento Page 34 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Isotope Dilution Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Surrogate Legend PFBA = 13C4 PFBA PFPeA = 13C5 PFPeA 13C5PHA = 13C5 PFHxA C4PFHA = 13C4 PFHpA C8PFOA = 13C8 PFOA C9PFNA = 13C9 PFNA C6PFDA = 13C6 PFDA 13C7PUA = 13C7 PFUnA PFDoA = 13C2 PFDoA PFTDA = 13C2 PFTeDA C3PFBS = 13C3 PFBS C3PFHS = 13C3 PFHxS C8PFOS = 13C8 PFOS PFOSA = 13C8 FOSA d3NMFOS = d3-NMeFOSAA d5NEFOS = d5-NEtFOSAA M242FTS = 13C2 4:2 FTS M262FTS = 13C2 6:2 FTS M282FTS = 13C2 8:2 FTS HFPODA = 13C3 HFPO-DA NMFM = d7-N-MeFOSE-M NEFM = d9-N-EtFOSE-M d5NPFSA = d5-NEtPFOSA d3NMFSA = d3-NMePFOSA Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS Prep Type: Total/NAMatrix: Water Lab Sample ID Client Sample ID (5-130)(40-130)(40-130)(40-130)(40-130)(40-130)(40-130)(30-130) PFBA PFPeA 13C5PHA C4PFHA C8PFOA C9PFNA C6PFDA 13C7PUA 118 116 112 113 104 98.6 107 115320-120292-11 Percent Isotope Dilution Recovery (Acceptance Limits) CORMAS-25-W003 114 107 98.1 95.1106 99.3 104 108320-120292-12 CORMAS-25-W004 112 102 99.5 103106 101 100 104320-120292-13 CORMAS-25-W002 111 105 103 104102 101 113 110320-120292-14 CORMAS-25-W001 105 107 91.9 92.9101 88.9 100 93.8LCS 320-844272/3-A Lab Control Sample 115 118 112 98.5113 97.6 97.2 101LCSD 320-844272/4-A Lab Control Sample Dup 108 107 99.9 109107 95.7 110 105LLCS 320-844272/2-A Lab Control Sample 112 115 110 104114 97.0 104 91.8MB 320-844272/1-A Method Blank Lab Sample ID Client Sample ID (10-130)(10-130)(40-135)(40-130)(40-130)(40-130)(40-170)(25-135) PFDoA PFTDA C3PFBS C3PFHS C8PFOS PFOSA d3NMFOS d5NEFOS 97.8 71.4 85.2 89.0 80.9 67.0 90.1 89.5320-120292-11 Percent Isotope Dilution Recovery (Acceptance Limits) CORMAS-25-W003 90.0 69.1 86.1 84.289.2 66.5 87.1 77.1320-120292-12 CORMAS-25-W004 97.9 70.9 80.3 85.085.7 66.6 84.8 75.5320-120292-13 CORMAS-25-W002 102 78.3 90.4 79.589.9 66.9 77.5 70.6320-120292-14 CORMAS-25-W001 85.6 69.7 83.7 76.681.5 66.6 74.1 68.9LCS 320-844272/3-A Lab Control Sample 90.1 74.8 89.3 86.189.7 72.7 81.5 73.2LCSD 320-844272/4-A Lab Control Sample Dup 94.4 80.0 85.3 85.688.7 73.3 79.1 73.2LLCS 320-844272/2-A Lab Control Sample 89.6 78.0 85.9 87.384.6 79.4 82.9 75.5MB 320-844272/1-A Method Blank Lab Sample ID Client Sample ID (40-200)(40-200)(40-300)(40-130)(10-130)(10-130)(10-130)(10-130) M242FTS M262FTS M282FTS HFPODA NMFM NEFM d5NPFSA d3NMFSA 95.2 96.2 101 131 *5+65.0 62.2 62.1 52.5320-120292-11 Percent Isotope Dilution Recovery (Acceptance Limits) CORMAS-25-W003 Eurofins Sacramento Page 35 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Isotope Dilution Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Prep Type: Total/NAMatrix: Water Lab Sample ID Client Sample ID (40-200)(40-200)(40-300)(40-130)(10-130)(10-130)(10-130)(10-130) M242FTS M262FTS M282FTS HFPODA NMFM NEFM d5NPFSA d3NMFSA 103 101 95.7 121 70.8 72.2 63.6 54.0320-120292-12 Percent Isotope Dilution Recovery (Acceptance Limits) CORMAS-25-W004 87.1 82.7 106 67.6115 69.4 65.6 53.5320-120292-13 CORMAS-25-W002 103 108 116 61.8119 61.4 66.6 56.0320-120292-14 CORMAS-25-W001 81.7 88.2 88.7 66.3121 65.5 57.7 49.1LCS 320-844272/3-A Lab Control Sample 88.0 94.1 98.8 73.6140 *5+72.1 62.9 54.1LCSD 320-844272/4-A Lab Control Sample Dup 86.3 90.5 96.5 78.7117 75.9 67.5 56.3LLCS 320-844272/2-A Lab Control Sample 82.9 91.5 95.8 76.8132 *5+78.5 70.2 59.6MB 320-844272/1-A Method Blank Surrogate Legend PFBA = 13C4 PFBA PFPeA = 13C5 PFPeA 13C5PHA = 13C5 PFHxA C4PFHA = 13C4 PFHpA C8PFOA = 13C8 PFOA C9PFNA = 13C9 PFNA C6PFDA = 13C6 PFDA 13C7PUA = 13C7 PFUnA PFDoA = 13C2 PFDoA PFTDA = 13C2 PFTeDA C3PFBS = 13C3 PFBS C3PFHS = 13C3 PFHxS C8PFOS = 13C8 PFOS PFOSA = 13C8 FOSA d3NMFOS = d3-NMeFOSAA d5NEFOS = d5-NEtFOSAA M242FTS = 13C2 4:2 FTS M262FTS = 13C2 6:2 FTS M282FTS = 13C2 8:2 FTS HFPODA = 13C3 HFPO-DA NMFM = d7-N-MeFOSE-M NEFM = d9-N-EtFOSE-M d5NPFSA = d5-NEtPFOSA d3NMFSA = d3-NMePFOSA Eurofins Sacramento Page 36 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS Client Sample ID: Method BlankLab Sample ID: MB 320-844272/1-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 RL MDL Perfluorobutanoic acid (PFBA)ND 4.0 1.0 ng/L 04/04/25 11:20 04/08/25 11:58 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoropentanoic acid (PFPeA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorohexanoic acid (PFHxA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoroheptanoic acid (PFHpA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorooctanoic acid (PFOA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorononanoic acid (PFNA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorodecanoic acid (PFDA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoroundecanoic acid (PFUnA) ND 0.552.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorododecanoic acid (PFDoA) ND 0.582.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorotridecanoic acid (PFTrDA) ND 0.812.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorotetradecanoic acid (PFTeDA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorobutanesulfonic acid (PFBS) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoropentanesulfonic acid (PFPeS) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorohexanesulfonic acid (PFHxS) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoroheptanesulfonic acid (PFHpS) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorooctanesulfonic acid (PFOS) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorononanesulfonic acid (PFNS) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorodecanesulfonic acid (PFDS) ND 0.532.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorododecanesulfonic acid (PFDoS) ND 1.04.0 ng/L 04/04/25 11:20 04/08/25 11:58 11H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) ND 1.04.0 ng/L 04/04/25 11:20 04/08/25 11:58 11H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) ND 1.04.0 ng/L 04/04/25 11:20 04/08/25 11:58 11H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluorooctanesulfonamide (PFOSA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1N-methylperfluorooctane sulfonamide (NMeFOSA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1N-ethylperfluorooctane sulfonamide (NEtFOSA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1N-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1N-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) ND 2.510 ng/L 04/04/25 11:20 04/08/25 11:58 1N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) ND 2.510 ng/L 04/04/25 11:20 04/08/25 11:58 1N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) ND 0.391.5 ng/L 04/04/25 11:20 04/08/25 11:58 1Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 14,8-Dioxa-3H-perfluorononanoic acid (ADONA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoro-3-methoxypropanoic acid (PFMPA) ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoro-4-methoxybutanoic acid (PFMBA) ND 0.722.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) ND 0.582.0 ng/L 04/04/25 11:20 04/08/25 11:58 19-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) Eurofins Sacramento Page 37 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Method BlankLab Sample ID: MB 320-844272/1-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 RL MDL 11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) ND 2.0 0.50 ng/L 04/04/25 11:20 04/08/25 11:58 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.502.0 ng/L 04/04/25 11:20 04/08/25 11:58 1Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) ND 1.04.0 ng/L 04/04/25 11:20 04/08/25 11:58 13-Perfluoropropylpropanoic acid (3:3 FTCA) ND 2.510 ng/L 04/04/25 11:20 04/08/25 11:58 13-Perfluoropentylpropanoic acid (5:3 FTCA) ND 2.510 ng/L 04/04/25 11:20 04/08/25 11:58 13-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 112 5 -130 04/08/25 11:58 1 MB MB Isotope Dilution 04/04/25 11:20 Dil FacPreparedAnalyzedQualifierLimits%Recovery 115 04/04/25 11:20 04/08/25 11:58 113C5 PFPeA 40 -130 110 04/04/25 11:20 04/08/25 11:58 113C5 PFHxA 40 -130 114 04/04/25 11:20 04/08/25 11:58 113C4 PFHpA 40 -130 104 04/04/25 11:20 04/08/25 11:58 113C8 PFOA 40 -130 97.0 04/04/25 11:20 04/08/25 11:58 113C9 PFNA 40 -130 104 04/04/25 11:20 04/08/25 11:58 113C6 PFDA 40 -130 91.8 04/04/25 11:20 04/08/25 11:58 113C7 PFUnA 30 -130 89.6 04/04/25 11:20 04/08/25 11:58 113C2 PFDoA 10 -130 78.0 04/04/25 11:20 04/08/25 11:58 113C2 PFTeDA 10 -130 85.9 04/04/25 11:20 04/08/25 11:58 113C3 PFBS 40 -135 84.6 04/04/25 11:20 04/08/25 11:58 113C3 PFHxS 40 -130 87.3 04/04/25 11:20 04/08/25 11:58 113C8 PFOS 40 -130 79.4 04/04/25 11:20 04/08/25 11:58 113C8 FOSA 40 -130 82.9 04/04/25 11:20 04/08/25 11:58 1d3-NMeFOSAA 40 -170 75.5 04/04/25 11:20 04/08/25 11:58 1d5-NEtFOSAA 25 -135 82.9 04/04/25 11:20 04/08/25 11:58 113C2 4:2 FTS 40 -200 91.5 04/04/25 11:20 04/08/25 11:58 113C2 6:2 FTS 40 -200 95.8 04/04/25 11:20 04/08/25 11:58 113C2 8:2 FTS 40 -300 132 *5+04/04/25 11:20 04/08/25 11:58 113C3 HFPO-DA 40 -130 76.8 04/04/25 11:20 04/08/25 11:58 1d7-N-MeFOSE-M 10 -130 78.5 04/04/25 11:20 04/08/25 11:58 1d9-N-EtFOSE-M 10 -130 70.2 04/04/25 11:20 04/08/25 11:58 1d5-NEtPFOSA 10 -130 59.6 04/04/25 11:20 04/08/25 11:58 1d3-NMePFOSA 10 -130 Client Sample ID: Lab Control SampleLab Sample ID: LCS 320-844272/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Perfluorobutanoic acid (PFBA)80.0 87.5 ng/L 109 70 -140 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluoropentanoic acid (PFPeA)40.0 40.5 ng/L 101 65 -135 Perfluorohexanoic acid (PFHxA)40.0 46.7 ng/L 117 70 -145 Perfluoroheptanoic acid (PFHpA)40.0 47.6 ng/L 119 70 -150 Perfluorooctanoic acid (PFOA)40.0 49.0 ng/L 122 70 -150 Perfluorononanoic acid (PFNA)40.0 48.4 ng/L 121 70 -150 Perfluorodecanoic acid (PFDA)40.0 48.7 ng/L 122 70 -140 Eurofins Sacramento Page 38 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 320-844272/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Perfluoroundecanoic acid (PFUnA) 40.0 43.3 ng/L 108 70 -145 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluorododecanoic acid (PFDoA) 40.0 46.5 ng/L 116 70 -140 Perfluorotridecanoic acid (PFTrDA) 40.0 46.6 ng/L 117 65 -140 Perfluorotetradecanoic acid (PFTeDA) 40.0 54.2 ng/L 135 60 -140 Perfluorobutanesulfonic acid (PFBS) 35.5 44.9 ng/L 126 60 -145 Perfluoropentanesulfonic acid (PFPeS) 37.6 40.6 ng/L 108 65 -140 Perfluorohexanesulfonic acid (PFHxS) 36.5 44.5 ng/L 122 65 -145 Perfluoroheptanesulfonic acid (PFHpS) 38.2 47.7 ng/L 125 70 -150 Perfluorooctanesulfonic acid (PFOS) 37.2 42.1 ng/L 113 55 -150 Perfluorononanesulfonic acid (PFNS) 38.5 50.7 ng/L 132 65 -145 Perfluorodecanesulfonic acid (PFDS) 38.6 38.5 ng/L 100 60 -145 Perfluorododecanesulfonic acid (PFDoS) 38.8 35.4 ng/L 91 50 -145 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 75.0 83.8 ng/L 112 70 -145 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 76.2 82.6 ng/L 108 65 -155 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 76.8 90.1 ng/L 117 60 -150 Perfluorooctanesulfonamide (PFOSA) 40.0 46.8 ng/L 117 70 -145 N-methylperfluorooctane sulfonamide (NMeFOSA) 40.0 53.8 ng/L 134 60 -150 N-ethylperfluorooctane sulfonamide (NEtFOSA) 40.0 43.1 ng/L 108 65 -145 N-methylperfluorooctanesulfona midoacetic acid (NMeFOSAA) 40.0 46.1 ng/L 115 50 -140 N-ethylperfluorooctanesulfonami doacetic acid (NEtFOSAA) 40.0 43.4 ng/L 108 70 -145 N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 200 212 ng/L 106 70 -145 N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 200 221 ng/L 111 70 -135 Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) 30.0 28.6 ng/L 95 70 -140 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 37.8 34.5 ng/L 91 65 -145 Perfluoro-3-methoxypropanoic acid (PFMPA) 40.0 37.5 ng/L 94 55 -140 Perfluoro-4-methoxybutanoic acid (PFMBA) 40.0 42.9 ng/L 107 60 -150 Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 40.0 42.5 ng/L 106 50 -150 Eurofins Sacramento Page 39 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 320-844272/3-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 9-Chlorohexadecafluoro-3-oxan onane-1-sulfonic acid (9Cl-PF3ONS) 37.4 36.2 ng/L 97 70 -155 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits 11-Chloroeicosafluoro-3-oxaund ecane-1-sulfonic acid (11Cl-PF3OUdS) 37.8 32.0 ng/L 85 55 -160 Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 35.7 49.0 ng/L 137 70 -140 3-Perfluoropropylpropanoic acid (3:3 FTCA) 80.0 83.9 ng/L 105 65 -130 3-Perfluoropentylpropanoic acid (5:3 FTCA) 200 226 ng/L 113 70 -135 3-Perfluoroheptylpropanoic acid (7:3 FTCA) 200 238 ng/L 119 50 -145 13C4 PFBA 5 -130 Isotope Dilution 105 LCS LCS Qualifier Limits%Recovery 10713C5 PFPeA 40 -130 91.913C5 PFHxA 40 -130 10113C4 PFHpA 40 -130 92.913C8 PFOA 40 -130 88.913C9 PFNA 40 -130 10013C6 PFDA 40 -130 93.813C7 PFUnA 30 -130 85.613C2 PFDoA 10 -130 69.713C2 PFTeDA 10 -130 83.713C3 PFBS 40 -135 81.513C3 PFHxS 40 -130 76.613C8 PFOS 40 -130 66.613C8 FOSA 40 -130 74.1d3-NMeFOSAA 40 -170 68.9d5-NEtFOSAA 25 -135 81.713C2 4:2 FTS 40 -200 88.213C2 6:2 FTS 40 -200 88.713C2 8:2 FTS 40 -300 12113C3 HFPO-DA 40 -130 66.3d7-N-MeFOSE-M 10 -130 65.5d9-N-EtFOSE-M 10 -130 57.7d5-NEtPFOSA 10 -130 49.1d3-NMePFOSA 10 -130 Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 320-844272/4-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Perfluorobutanoic acid (PFBA)80.0 76.0 ng/L 95 70 -140 14 30 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Perfluoropentanoic acid (PFPeA)40.0 36.2 ng/L 91 65 -135 11 30 Perfluorohexanoic acid (PFHxA)40.0 37.1 ng/L 93 70 -145 23 30 Perfluoroheptanoic acid (PFHpA)40.0 43.2 ng/L 108 70 -150 10 30 Perfluorooctanoic acid (PFOA)40.0 42.4 ng/L 106 70 -150 14 30 Eurofins Sacramento Page 40 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 320-844272/4-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Perfluorononanoic acid (PFNA)40.0 40.4 ng/L 101 70 -150 18 30 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Perfluorodecanoic acid (PFDA)40.0 43.4 ng/L 108 70 -140 12 30 Perfluoroundecanoic acid (PFUnA) 40.0 38.0 ng/L 95 70 -145 13 30 Perfluorododecanoic acid (PFDoA) 40.0 38.0 ng/L 95 70 -140 20 30 Perfluorotridecanoic acid (PFTrDA) 40.0 39.2 ng/L 98 65 -140 17 30 Perfluorotetradecanoic acid (PFTeDA) 40.0 45.8 ng/L 114 60 -140 17 30 Perfluorobutanesulfonic acid (PFBS) 35.5 37.1 ng/L 104 60 -145 19 30 Perfluoropentanesulfonic acid (PFPeS) 37.6 33.0 ng/L 88 65 -140 21 30 Perfluorohexanesulfonic acid (PFHxS) 36.5 36.2 ng/L 99 65 -145 21 30 Perfluoroheptanesulfonic acid (PFHpS) 38.2 39.7 ng/L 104 70 -150 18 30 Perfluorooctanesulfonic acid (PFOS) 37.2 36.4 ng/L 98 55 -150 15 30 Perfluorononanesulfonic acid (PFNS) 38.5 40.4 ng/L 105 65 -145 22 30 Perfluorodecanesulfonic acid (PFDS) 38.6 33.1 ng/L 86 60 -145 15 30 Perfluorododecanesulfonic acid (PFDoS) 38.8 31.2 ng/L 80 50 -145 13 30 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 75.0 72.0 ng/L 96 70 -145 15 30 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 76.2 71.2 ng/L 94 65 -155 15 30 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 76.8 71.3 ng/L 93 60 -150 23 30 Perfluorooctanesulfonamide (PFOSA) 40.0 39.4 ng/L 98 70 -145 17 30 N-methylperfluorooctane sulfonamide (NMeFOSA) 40.0 47.4 ng/L 118 60 -150 13 30 N-ethylperfluorooctane sulfonamide (NEtFOSA) 40.0 38.4 ng/L 96 65 -145 11 30 N-methylperfluorooctanesulfona midoacetic acid (NMeFOSAA) 40.0 37.9 ng/L 95 50 -140 19 30 N-ethylperfluorooctanesulfonami doacetic acid (NEtFOSAA) 40.0 37.6 ng/L 94 70 -145 14 30 N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 200 176 ng/L 88 70 -145 19 30 N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 200 188 ng/L 94 70 -135 16 30 Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) 30.0 25.2 ng/L 84 70 -140 13 30 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 37.8 29.5 ng/L 78 65 -145 16 30 Perfluoro-3-methoxypropanoic acid (PFMPA) 40.0 34.7 ng/L 87 55 -140 8 30 Perfluoro-4-methoxybutanoic acid (PFMBA) 40.0 38.1 ng/L 95 60 -150 12 30 Eurofins Sacramento Page 41 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 320-844272/4-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 40.0 31.9 ng/L 80 50 -150 29 30 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD 9-Chlorohexadecafluoro-3-oxan onane-1-sulfonic acid (9Cl-PF3ONS) 37.4 29.5 ng/L 79 70 -155 20 30 11-Chloroeicosafluoro-3-oxaund ecane-1-sulfonic acid (11Cl-PF3OUdS) 37.8 25.3 ng/L 67 55 -160 23 30 Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 35.7 38.0 ng/L 107 70 -140 25 30 3-Perfluoropropylpropanoic acid (3:3 FTCA) 80.0 74.4 ng/L 93 65 -130 12 30 3-Perfluoropentylpropanoic acid (5:3 FTCA) 200 187 ng/L 94 70 -135 19 30 3-Perfluoroheptylpropanoic acid (7:3 FTCA) 200 183 ng/L 91 50 -145 26 30 13C4 PFBA 5 -130 Isotope Dilution 115 LCSD LCSD Qualifier Limits%Recovery 11813C5 PFPeA 40 -130 11213C5 PFHxA 40 -130 11313C4 PFHpA 40 -130 98.513C8 PFOA 40 -130 97.613C9 PFNA 40 -130 97.213C6 PFDA 40 -130 10113C7 PFUnA 30 -130 90.113C2 PFDoA 10 -130 74.813C2 PFTeDA 10 -130 89.313C3 PFBS 40 -135 89.713C3 PFHxS 40 -130 86.113C8 PFOS 40 -130 72.713C8 FOSA 40 -130 81.5d3-NMeFOSAA 40 -170 73.2d5-NEtFOSAA 25 -135 88.013C2 4:2 FTS 40 -200 94.113C2 6:2 FTS 40 -200 98.813C2 8:2 FTS 40 -300 140 *5+13C3 HFPO-DA 40 -130 73.6d7-N-MeFOSE-M 10 -130 72.1d9-N-EtFOSE-M 10 -130 62.9d5-NEtPFOSA 10 -130 54.1d3-NMePFOSA 10 -130 Client Sample ID: Lab Control SampleLab Sample ID: LLCS 320-844272/2-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Perfluorobutanoic acid (PFBA)8.00 7.50 ng/L 94 70 -140 Analyte LLCS LLCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluoropentanoic acid (PFPeA)4.00 3.51 ng/L 88 65 -135 Perfluorohexanoic acid (PFHxA)4.00 3.78 ng/L 94 70 -145 Eurofins Sacramento Page 42 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LLCS 320-844272/2-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Perfluoroheptanoic acid (PFHpA)4.00 4.09 ng/L 102 70 -150 Analyte LLCS LLCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluorooctanoic acid (PFOA)4.00 3.95 ng/L 99 70 -150 Perfluorononanoic acid (PFNA)4.00 3.85 ng/L 96 70 -150 Perfluorodecanoic acid (PFDA)4.00 3.89 ng/L 97 70 -140 Perfluoroundecanoic acid (PFUnA) 4.00 3.38 ng/L 84 70 -145 Perfluorododecanoic acid (PFDoA) 4.00 3.41 ng/L 85 70 -140 Perfluorotridecanoic acid (PFTrDA) 4.00 3.15 ng/L 79 65 -140 Perfluorotetradecanoic acid (PFTeDA) 4.00 3.84 ng/L 96 60 -140 Perfluorobutanesulfonic acid (PFBS) 3.55 3.40 ng/L 96 60 -145 Perfluoropentanesulfonic acid (PFPeS) 3.76 3.26 ng/L 87 65 -140 Perfluorohexanesulfonic acid (PFHxS) 3.65 3.44 ng/L 94 65 -145 Perfluoroheptanesulfonic acid (PFHpS) 3.82 3.92 ng/L 103 70 -150 Perfluorooctanesulfonic acid (PFOS) 3.72 3.56 ng/L 96 55 -150 Perfluorononanesulfonic acid (PFNS) 3.85 3.53 ng/L 92 65 -145 Perfluorodecanesulfonic acid (PFDS) 3.86 3.04 ng/L 79 60 -145 Perfluorododecanesulfonic acid (PFDoS) 3.88 2.24 ng/L 58 50 -145 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 7.50 6.57 ng/L 88 70 -145 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 7.62 6.54 ng/L 86 65 -155 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 7.68 7.51 ng/L 98 60 -150 Perfluorooctanesulfonamide (PFOSA) 4.00 3.89 ng/L 97 70 -145 N-methylperfluorooctane sulfonamide (NMeFOSA) 4.00 4.18 ng/L 104 60 -150 N-ethylperfluorooctane sulfonamide (NEtFOSA) 4.00 3.20 ng/L 80 65 -145 N-methylperfluorooctanesulfona midoacetic acid (NMeFOSAA) 4.00 3.72 ng/L 93 50 -140 N-ethylperfluorooctanesulfonami doacetic acid (NEtFOSAA) 4.00 3.35 ng/L 84 70 -145 N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 20.0 15.3 ng/L 76 70 -145 N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 20.0 17.2 ng/L 86 70 -135 Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) 3.00 2.70 ng/L 90 70 -140 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 3.78 2.92 ng/L 77 65 -145 Perfluoro-3-methoxypropanoic acid (PFMPA) 4.00 3.22 ng/L 81 55 -140 Eurofins Sacramento Page 43 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LLCS 320-844272/2-A Matrix: Water Prep Type: Total/NA Analysis Batch: 844869 Prep Batch: 844272 Perfluoro-4-methoxybutanoic acid (PFMBA) 4.00 3.34 ng/L 83 60 -150 Analyte LLCS LLCS DUnitResultQualifier %Rec Spike Added %Rec Limits Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 4.00 4.04 ng/L 101 50 -150 9-Chlorohexadecafluoro-3-oxan onane-1-sulfonic acid (9Cl-PF3ONS) 3.74 2.96 ng/L 79 70 -155 11-Chloroeicosafluoro-3-oxaund ecane-1-sulfonic acid (11Cl-PF3OUdS) 3.78 2.71 ng/L 72 55 -160 Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 3.57 3.66 ng/L 102 70 -140 3-Perfluoropropylpropanoic acid (3:3 FTCA) 8.00 6.74 ng/L 84 65 -130 3-Perfluoropentylpropanoic acid (5:3 FTCA) 20.0 16.5 ng/L 83 70 -135 3-Perfluoroheptylpropanoic acid (7:3 FTCA) 20.0 16.5 ng/L 82 50 -145 13C4 PFBA 5 -130 Isotope Dilution 108 LLCS LLCS Qualifier Limits%Recovery 10713C5 PFPeA 40 -130 99.913C5 PFHxA 40 -130 10713C4 PFHpA 40 -130 10913C8 PFOA 40 -130 95.713C9 PFNA 40 -130 11013C6 PFDA 40 -130 10513C7 PFUnA 30 -130 94.413C2 PFDoA 10 -130 80.013C2 PFTeDA 10 -130 85.313C3 PFBS 40 -135 88.713C3 PFHxS 40 -130 85.613C8 PFOS 40 -130 73.313C8 FOSA 40 -130 79.1d3-NMeFOSAA 40 -170 73.2d5-NEtFOSAA 25 -135 86.313C2 4:2 FTS 40 -200 90.513C2 6:2 FTS 40 -200 96.513C2 8:2 FTS 40 -300 11713C3 HFPO-DA 40 -130 78.7d7-N-MeFOSE-M 10 -130 75.9d9-N-EtFOSE-M 10 -130 67.5d5-NEtPFOSA 10 -130 56.3d3-NMePFOSA 10 -130 Client Sample ID: Method BlankLab Sample ID: MB 320-844949/1-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 RL MDL Perfluorobutanoic acid (PFBA)ND 0.40 0.10 ug/Kg 04/09/25 06:19 04/10/25 11:06 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier Eurofins Sacramento Page 44 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Method BlankLab Sample ID: MB 320-844949/1-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 RL MDL Perfluoropentanoic acid (PFPeA)ND 0.20 0.050 ug/Kg 04/09/25 06:19 04/10/25 11:06 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorohexanoic acid (PFHxA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluoroheptanoic acid (PFHpA) ND 0.0620.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorooctanoic acid (PFOA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorononanoic acid (PFNA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorodecanoic acid (PFDA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluoroundecanoic acid (PFUnA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorododecanoic acid (PFDoA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorotridecanoic acid (PFTrDA) ND 0.0580.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorotetradecanoic acid (PFTeDA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorobutanesulfonic acid (PFBS) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluoropentanesulfonic acid (PFPeS) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorohexanesulfonic acid (PFHxS) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluoroheptanesulfonic acid (PFHpS) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorooctanesulfonic acid (PFOS) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorononanesulfonic acid (PFNS) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorodecanesulfonic acid (PFDS) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorododecanesulfonic acid (PFDoS) ND 0.100.40 ug/Kg 04/09/25 06:19 04/10/25 11:06 11H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) ND 0.100.40 ug/Kg 04/09/25 06:19 04/10/25 11:06 11H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) ND 0.100.40 ug/Kg 04/09/25 06:19 04/10/25 11:06 11H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) ND 0.0630.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluorooctanesulfonamide (PFOSA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1N-methylperfluorooctane sulfonamide (NMeFOSA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1N-ethylperfluorooctane sulfonamide (NEtFOSA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1N-methylperfluorooctanesulfonamidoa cetic acid (NMeFOSAA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1N-ethylperfluorooctanesulfonamidoac etic acid (NEtFOSAA) ND 0.251.0 ug/Kg 04/09/25 06:19 04/10/25 11:06 1N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) ND 0.251.0 ug/Kg 04/09/25 06:19 04/10/25 11:06 1N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 14,8-Dioxa-3H-perfluorononanoic acid (ADONA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluoro-3-methoxypropanoic acid (PFMPA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluoro-4-methoxybutanoic acid (PFMBA) ND 0.0620.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 19-Chlorohexadecafluoro-3-oxanonan e-1-sulfonic acid (9Cl-PF3ONS) Eurofins Sacramento Page 45 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Method BlankLab Sample ID: MB 320-844949/1-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 RL MDL 11-Chloroeicosafluoro-3-oxaundecan e-1-sulfonic acid (11Cl-PF3OUdS) ND 0.20 0.075 ug/Kg 04/09/25 06:19 04/10/25 11:06 1 MB MB Analyte Dil FacAnalyzedPreparedDUnitResultQualifier ND 0.0500.20 ug/Kg 04/09/25 06:19 04/10/25 11:06 1Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) ND 0.100.40 ug/Kg 04/09/25 06:19 04/10/25 11:06 13-Perfluoropropylpropanoic acid (3:3 FTCA) ND 0.251.0 ug/Kg 04/09/25 06:19 04/10/25 11:06 13-Perfluoropentylpropanoic acid (5:3 FTCA) ND 0.251.0 ug/Kg 04/09/25 06:19 04/10/25 11:06 13-Perfluoroheptylpropanoic acid (7:3 FTCA) 13C4 PFBA 103 8 -130 04/10/25 11:06 1 MB MB Isotope Dilution 04/09/25 06:19 Dil FacPreparedAnalyzedQualifierLimits%Recovery 106 04/09/25 06:19 04/10/25 11:06 113C5 PFPeA 35 -130 93.1 04/09/25 06:19 04/10/25 11:06 113C5 PFHxA 40 -130 104 04/09/25 06:19 04/10/25 11:06 113C4 PFHpA 40 -130 95.0 04/09/25 06:19 04/10/25 11:06 113C8 PFOA 40 -130 90.3 04/09/25 06:19 04/10/25 11:06 113C9 PFNA 40 -130 91.9 04/09/25 06:19 04/10/25 11:06 113C6 PFDA 40 -130 80.7 04/09/25 06:19 04/10/25 11:06 113C7 PFUnA 40 -130 81.9 04/09/25 06:19 04/10/25 11:06 113C2 PFDoA 40 -130 77.5 04/09/25 06:19 04/10/25 11:06 113C2 PFTeDA 20 -130 78.0 04/09/25 06:19 04/10/25 11:06 113C3 PFBS 40 -135 81.7 04/09/25 06:19 04/10/25 11:06 113C3 PFHxS 40 -130 87.8 04/09/25 06:19 04/10/25 11:06 113C8 PFOS 40 -130 71.2 04/09/25 06:19 04/10/25 11:06 113C8 FOSA 40 -130 68.3 04/09/25 06:19 04/10/25 11:06 1d3-NMeFOSAA 40 -135 63.3 04/09/25 06:19 04/10/25 11:06 1d5-NEtFOSAA 40 -150 109 04/09/25 06:19 04/10/25 11:06 113C2 4:2 FTS 40 -165 120 04/09/25 06:19 04/10/25 11:06 113C2 6:2 FTS 40 -215 117 04/09/25 06:19 04/10/25 11:06 113C2 8:2 FTS 40 -275 105 04/09/25 06:19 04/10/25 11:06 113C3 HFPO-DA 40 -130 72.0 04/09/25 06:19 04/10/25 11:06 1d7-N-MeFOSE-M 20 -130 69.8 04/09/25 06:19 04/10/25 11:06 1d9-N-EtFOSE-M 15 -130 50.9 04/09/25 06:19 04/10/25 11:06 1d5-NEtPFOSA 10 -130 41.9 04/09/25 06:19 04/10/25 11:06 1d3-NMePFOSA 10 -130 Client Sample ID: Lab Control SampleLab Sample ID: LCS 320-844949/3-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Perfluorobutanoic acid (PFBA)5.00 5.26 ug/Kg 105 70 -140 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluoropentanoic acid (PFPeA)2.50 2.16 ug/Kg 87 60 -150 Perfluorohexanoic acid (PFHxA)2.50 2.27 ug/Kg 91 65 -140 Perfluoroheptanoic acid (PFHpA)2.50 2.43 ug/Kg 97 65 -145 Perfluorooctanoic acid (PFOA)2.50 2.47 ug/Kg 99 70 -150 Perfluorononanoic acid (PFNA)2.50 2.55 ug/Kg 102 70 -155 Perfluorodecanoic acid (PFDA)2.50 2.34 ug/Kg 94 70 -155 Eurofins Sacramento Page 46 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 320-844949/3-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Perfluoroundecanoic acid (PFUnA) 2.50 2.50 ug/Kg 100 70 -155 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluorododecanoic acid (PFDoA) 2.50 2.35 ug/Kg 94 70 -150 Perfluorotridecanoic acid (PFTrDA) 2.50 2.49 ug/Kg 100 65 -150 Perfluorotetradecanoic acid (PFTeDA) 2.50 2.54 ug/Kg 102 65 -150 Perfluorobutanesulfonic acid (PFBS) 2.22 2.00 ug/Kg 90 65 -145 Perfluoropentanesulfonic acid (PFPeS) 2.35 2.17 ug/Kg 93 55 -160 Perfluorohexanesulfonic acid (PFHxS) 2.28 2.10 ug/Kg 92 60 -150 Perfluoroheptanesulfonic acid (PFHpS) 2.39 2.48 ug/Kg 104 65 -155 Perfluorooctanesulfonic acid (PFOS) 2.33 2.11 ug/Kg 91 65 -160 Perfluorononanesulfonic acid (PFNS) 2.41 2.19 ug/Kg 91 55 -140 Perfluorodecanesulfonic acid (PFDS) 2.41 2.05 ug/Kg 85 40 -155 Perfluorododecanesulfonic acid (PFDoS) 2.43 1.84 ug/Kg 76 25 -160 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 4.69 5.03 ug/Kg 107 60 -150 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 4.76 4.84 ug/Kg 102 55 -200 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 4.80 5.50 ug/Kg 115 70 -150 Perfluorooctanesulfonamide (PFOSA) 2.50 2.47 ug/Kg 99 70 -140 N-methylperfluorooctane sulfonamide (NMeFOSA) 2.50 2.83 ug/Kg 113 70 -155 N-ethylperfluorooctane sulfonamide (NEtFOSA) 2.50 2.37 ug/Kg 95 70 -140 N-methylperfluorooctanesulfona midoacetic acid (NMeFOSAA) 2.50 2.30 ug/Kg 92 65 -155 N-ethylperfluorooctanesulfonami doacetic acid (NEtFOSAA) 2.50 2.25 ug/Kg 90 65 -165 N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 12.5 11.9 ug/Kg 95 70 -140 N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 12.5 11.3 ug/Kg 90 70 -135 Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) 1.88 1.70 ug/Kg 91 70 -145 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2.37 2.49 ug/Kg 105 70 -160 Perfluoro-3-methoxypropanoic acid (PFMPA) 2.50 2.31 ug/Kg 93 30 -140 Perfluoro-4-methoxybutanoic acid (PFMBA) 2.50 1.90 ug/Kg 76 60 -150 Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 2.50 2.13 ug/Kg 85 60 -155 Eurofins Sacramento Page 47 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LCS 320-844949/3-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 9-Chlorohexadecafluoro-3-oxan onane-1-sulfonic acid (9Cl-PF3ONS) 2.34 2.17 ug/Kg 93 70 -150 Analyte LCS LCS DUnitResultQualifier %Rec Spike Added %Rec Limits 11-Chloroeicosafluoro-3-oxaund ecane-1-sulfonic acid (11Cl-PF3OUdS) 2.36 2.09 ug/Kg 89 45 -160 Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 2.23 2.33 ug/Kg 104 70 -140 3-Perfluoropropylpropanoic acid (3:3 FTCA) 5.00 4.32 ug/Kg 86 45 -130 3-Perfluoropentylpropanoic acid (5:3 FTCA) 12.5 10.9 ug/Kg 87 60 -130 3-Perfluoroheptylpropanoic acid (7:3 FTCA) 12.5 10.4 ug/Kg 83 60 -150 13C4 PFBA 8 -130 Isotope Dilution 95.7 LCS LCS Qualifier Limits%Recovery 99.313C5 PFPeA 35 -130 94.913C5 PFHxA 40 -130 10313C4 PFHpA 40 -130 89.413C8 PFOA 40 -130 84.913C9 PFNA 40 -130 96.713C6 PFDA 40 -130 85.913C7 PFUnA 40 -130 82.313C2 PFDoA 40 -130 76.613C2 PFTeDA 20 -130 78.113C3 PFBS 40 -135 81.613C3 PFHxS 40 -130 90.213C8 PFOS 40 -130 71.413C8 FOSA 40 -130 70.4d3-NMeFOSAA 40 -135 65.7d5-NEtFOSAA 40 -150 10613C2 4:2 FTS 40 -165 11313C2 6:2 FTS 40 -215 10913C2 8:2 FTS 40 -275 95.013C3 HFPO-DA 40 -130 70.2d7-N-MeFOSE-M 20 -130 70.2d9-N-EtFOSE-M 15 -130 47.7d5-NEtPFOSA 10 -130 38.4d3-NMePFOSA 10 -130 Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 320-844949/4-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Perfluorobutanoic acid (PFBA)5.00 4.95 ug/Kg 99 70 -140 6 30 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Perfluoropentanoic acid (PFPeA)2.50 2.25 ug/Kg 90 60 -150 4 30 Perfluorohexanoic acid (PFHxA)2.50 2.38 ug/Kg 95 65 -140 4 30 Perfluoroheptanoic acid (PFHpA)2.50 2.48 ug/Kg 99 65 -145 2 30 Perfluorooctanoic acid (PFOA)2.50 2.36 ug/Kg 94 70 -150 4 30 Eurofins Sacramento Page 48 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 320-844949/4-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Perfluorononanoic acid (PFNA)2.50 2.39 ug/Kg 95 70 -155 6 30 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD Perfluorodecanoic acid (PFDA)2.50 2.28 ug/Kg 91 70 -155 3 30 Perfluoroundecanoic acid (PFUnA) 2.50 2.39 ug/Kg 96 70 -155 4 30 Perfluorododecanoic acid (PFDoA) 2.50 2.27 ug/Kg 91 70 -150 3 30 Perfluorotridecanoic acid (PFTrDA) 2.50 2.57 ug/Kg 103 65 -150 3 30 Perfluorotetradecanoic acid (PFTeDA) 2.50 2.81 ug/Kg 113 65 -150 10 30 Perfluorobutanesulfonic acid (PFBS) 2.22 2.04 ug/Kg 92 65 -145 2 30 Perfluoropentanesulfonic acid (PFPeS) 2.35 2.22 ug/Kg 94 55 -160 2 30 Perfluorohexanesulfonic acid (PFHxS) 2.28 2.05 ug/Kg 90 60 -150 2 30 Perfluoroheptanesulfonic acid (PFHpS) 2.39 2.61 ug/Kg 110 65 -155 5 30 Perfluorooctanesulfonic acid (PFOS) 2.33 2.22 ug/Kg 95 65 -160 5 30 Perfluorononanesulfonic acid (PFNS) 2.41 2.40 ug/Kg 100 55 -140 9 30 Perfluorodecanesulfonic acid (PFDS) 2.41 2.24 ug/Kg 93 40 -155 9 30 Perfluorododecanesulfonic acid (PFDoS) 2.43 2.03 ug/Kg 84 25 -160 10 30 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 4.69 4.66 ug/Kg 99 60 -150 8 30 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 4.76 4.97 ug/Kg 104 55 -200 3 30 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 4.80 5.28 ug/Kg 110 70 -150 4 30 Perfluorooctanesulfonamide (PFOSA) 2.50 2.41 ug/Kg 96 70 -140 3 30 N-methylperfluorooctane sulfonamide (NMeFOSA) 2.50 2.94 ug/Kg 118 70 -155 4 30 N-ethylperfluorooctane sulfonamide (NEtFOSA) 2.50 2.35 ug/Kg 94 70 -140 1 30 N-methylperfluorooctanesulfona midoacetic acid (NMeFOSAA) 2.50 2.33 ug/Kg 93 65 -155 1 30 N-ethylperfluorooctanesulfonami doacetic acid (NEtFOSAA) 2.50 2.35 ug/Kg 94 65 -165 4 30 N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 12.5 11.4 ug/Kg 91 70 -140 4 30 N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 12.5 11.1 ug/Kg 89 70 -135 2 30 Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) 1.88 1.70 ug/Kg 91 70 -145 0 30 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2.37 2.21 ug/Kg 93 70 -160 12 30 Perfluoro-3-methoxypropanoic acid (PFMPA) 2.50 2.28 ug/Kg 91 30 -140 1 30 Perfluoro-4-methoxybutanoic acid (PFMBA) 2.50 2.16 ug/Kg 86 60 -150 13 30 Eurofins Sacramento Page 49 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 320-844949/4-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 2.50 2.58 ug/Kg 103 60 -155 19 30 Analyte LCSD LCSD DUnitResultQualifier %Rec Spike Added %Rec Limits LimitRPD RPD 9-Chlorohexadecafluoro-3-oxan onane-1-sulfonic acid (9Cl-PF3ONS) 2.34 1.99 ug/Kg 85 70 -150 9 30 11-Chloroeicosafluoro-3-oxaund ecane-1-sulfonic acid (11Cl-PF3OUdS) 2.36 2.01 ug/Kg 85 45 -160 4 30 Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 2.23 2.48 ug/Kg 111 70 -140 6 30 3-Perfluoropropylpropanoic acid (3:3 FTCA) 5.00 4.27 ug/Kg 85 45 -130 1 30 3-Perfluoropentylpropanoic acid (5:3 FTCA) 12.5 11.5 ug/Kg 92 60 -130 6 30 3-Perfluoroheptylpropanoic acid (7:3 FTCA) 12.5 10.8 ug/Kg 86 60 -150 4 30 13C4 PFBA 8 -130 Isotope Dilution 97.1 LCSD LCSD Qualifier Limits%Recovery 10413C5 PFPeA 35 -130 91.713C5 PFHxA 40 -130 10113C4 PFHpA 40 -130 98.013C8 PFOA 40 -130 91.213C9 PFNA 40 -130 93.513C6 PFDA 40 -130 83.013C7 PFUnA 40 -130 81.813C2 PFDoA 40 -130 69.913C2 PFTeDA 20 -130 79.813C3 PFBS 40 -135 81.113C3 PFHxS 40 -130 84.913C8 PFOS 40 -130 73.013C8 FOSA 40 -130 76.5d3-NMeFOSAA 40 -135 70.3d5-NEtFOSAA 40 -150 11313C2 4:2 FTS 40 -165 11513C2 6:2 FTS 40 -215 10913C2 8:2 FTS 40 -275 10113C3 HFPO-DA 40 -130 63.2d7-N-MeFOSE-M 20 -130 62.6d9-N-EtFOSE-M 15 -130 32.0d5-NEtPFOSA 10 -130 27.1d3-NMePFOSA 10 -130 Client Sample ID: Lab Control SampleLab Sample ID: LLCS 320-844949/2-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Perfluorobutanoic acid (PFBA)0.800 0.808 ug/Kg 101 70 -140 Analyte LLCS LLCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluoropentanoic acid (PFPeA)0.400 0.370 ug/Kg 92 60 -150 Perfluorohexanoic acid (PFHxA)0.400 0.383 ug/Kg 96 65 -140 Eurofins Sacramento Page 50 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LLCS 320-844949/2-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Perfluoroheptanoic acid (PFHpA)0.400 0.413 ug/Kg 103 65 -145 Analyte LLCS LLCS DUnitResultQualifier %Rec Spike Added %Rec Limits Perfluorooctanoic acid (PFOA)0.400 0.406 ug/Kg 102 70 -150 Perfluorononanoic acid (PFNA)0.400 0.426 ug/Kg 106 70 -155 Perfluorodecanoic acid (PFDA)0.400 0.393 ug/Kg 98 70 -155 Perfluoroundecanoic acid (PFUnA) 0.400 0.394 ug/Kg 99 70 -155 Perfluorododecanoic acid (PFDoA) 0.400 0.378 ug/Kg 94 70 -150 Perfluorotridecanoic acid (PFTrDA) 0.400 0.416 ug/Kg 104 65 -150 Perfluorotetradecanoic acid (PFTeDA) 0.400 0.437 ug/Kg 109 65 -150 Perfluorobutanesulfonic acid (PFBS) 0.355 0.345 ug/Kg 97 65 -145 Perfluoropentanesulfonic acid (PFPeS) 0.376 0.353 ug/Kg 94 55 -160 Perfluorohexanesulfonic acid (PFHxS) 0.365 0.360 ug/Kg 99 60 -150 Perfluoroheptanesulfonic acid (PFHpS) 0.382 0.458 ug/Kg 120 65 -155 Perfluorooctanesulfonic acid (PFOS) 0.372 0.393 ug/Kg 106 65 -160 Perfluorononanesulfonic acid (PFNS) 0.385 0.402 ug/Kg 105 55 -140 Perfluorodecanesulfonic acid (PFDS) 0.386 0.375 ug/Kg 97 40 -155 Perfluorododecanesulfonic acid (PFDoS) 0.388 0.302 ug/Kg 78 25 -160 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) 0.750 0.737 ug/Kg 98 60 -150 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) 0.762 0.757 ug/Kg 99 55 -200 1H,1H,2H,2H-Perfluorodecane sulfonic acid (8:2 FTS) 0.768 0.915 ug/Kg 119 70 -150 Perfluorooctanesulfonamide (PFOSA) 0.400 0.422 ug/Kg 105 70 -140 N-methylperfluorooctane sulfonamide (NMeFOSA) 0.400 0.492 ug/Kg 123 70 -155 N-ethylperfluorooctane sulfonamide (NEtFOSA) 0.400 0.407 ug/Kg 102 70 -140 N-methylperfluorooctanesulfona midoacetic acid (NMeFOSAA) 0.400 0.399 ug/Kg 100 65 -155 N-ethylperfluorooctanesulfonami doacetic acid (NEtFOSAA) 0.400 0.389 ug/Kg 97 65 -165 N-methylperfluorooctane sulfonamidoethanol (NMeFOSE) 2.00 1.97 ug/Kg 98 70 -140 N-ethylperfluorooctane sulfonamidoethanol (NEtFOSE) 2.00 1.94 ug/Kg 97 70 -135 Hexafluoropropylene Oxide Dimer Acid (HFPO-DA) 0.300 0.255 ug/Kg 85 70 -145 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 0.378 0.383 ug/Kg 101 70 -160 Perfluoro-3-methoxypropanoic acid (PFMPA) 0.400 0.399 ug/Kg 100 30 -140 Eurofins Sacramento Page 51 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Per- and Polyfluoroalkyl Substances by LC/MS/MS (Continued) Client Sample ID: Lab Control SampleLab Sample ID: LLCS 320-844949/2-A Matrix: Solid Prep Type: Total/NA Analysis Batch: 845256 Prep Batch: 844949 Perfluoro-4-methoxybutanoic acid (PFMBA) 0.400 0.350 ug/Kg 87 60 -150 Analyte LLCS LLCS DUnitResultQualifier %Rec Spike Added %Rec Limits Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.400 0.392 ug/Kg 98 60 -155 9-Chlorohexadecafluoro-3-oxan onane-1-sulfonic acid (9Cl-PF3ONS) 0.374 0.343 ug/Kg 92 70 -150 11-Chloroeicosafluoro-3-oxaund ecane-1-sulfonic acid (11Cl-PF3OUdS) 0.378 0.351 ug/Kg 93 45 -160 Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 0.357 0.373 ug/Kg 104 70 -140 3-Perfluoropropylpropanoic acid (3:3 FTCA) 0.800 0.716 ug/Kg 90 45 -130 3-Perfluoropentylpropanoic acid (5:3 FTCA) 2.00 1.78 ug/Kg 89 60 -130 3-Perfluoroheptylpropanoic acid (7:3 FTCA) 2.00 1.69 ug/Kg 84 60 -150 13C4 PFBA 8 -130 Isotope Dilution 103 LLCS LLCS Qualifier Limits%Recovery 11613C5 PFPeA 35 -130 10913C5 PFHxA 40 -130 12013C4 PFHpA 40 -130 95.813C8 PFOA 40 -130 88.913C9 PFNA 40 -130 89.313C6 PFDA 40 -130 80.713C7 PFUnA 40 -130 78.513C2 PFDoA 40 -130 67.513C2 PFTeDA 20 -130 79.313C3 PFBS 40 -135 82.013C3 PFHxS 40 -130 85.813C8 PFOS 40 -130 72.813C8 FOSA 40 -130 72.0d3-NMeFOSAA 40 -135 67.8d5-NEtFOSAA 40 -150 11713C2 4:2 FTS 40 -165 12113C2 6:2 FTS 40 -215 11313C2 8:2 FTS 40 -275 10613C3 HFPO-DA 40 -130 71.7d7-N-MeFOSE-M 20 -130 70.7d9-N-EtFOSE-M 15 -130 41.6d5-NEtPFOSA 10 -130 33.8d3-NMePFOSA 10 -130 Eurofins Sacramento Page 52 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Sample Results Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method: 1633 - Percent Moisture Client Sample ID: CORMAS-25-S001Lab Sample ID: 320-120292-6 DU Matrix: Solid Prep Type: Total/NA Analysis Batch: 844782 Percent Moisture 9.6 10 %5 20 Analyte DU DU DUnitResultQualifier Sample Result Sample Qualifier LimitRPD RPD Percent Solids 90 90 %0.5 20 Eurofins Sacramento Page 53 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Association Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport LCMS Prep Batch: 844272 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Water 1633320-120292-11 CORMAS-25-W003 Total/NA Water 1633320-120292-12 CORMAS-25-W004 Total/NA Water 1633320-120292-13 CORMAS-25-W002 Total/NA Water 1633320-120292-14 CORMAS-25-W001 Total/NA Water 1633MB 320-844272/1-A Method Blank Total/NA Water 1633LCS 320-844272/3-A Lab Control Sample Total/NA Water 1633LCSD 320-844272/4-A Lab Control Sample Dup Total/NA Water 1633LLCS 320-844272/2-A Lab Control Sample Total/NA Analysis Batch: 844869 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Water 1633 844272320-120292-11 CORMAS-25-W003 Total/NA Water 1633 844272320-120292-12 CORMAS-25-W004 Total/NA Water 1633 844272320-120292-13 CORMAS-25-W002 Total/NA Water 1633 844272320-120292-14 CORMAS-25-W001 Total/NA Water 1633 844272MB 320-844272/1-A Method Blank Total/NA Water 1633 844272LCS 320-844272/3-A Lab Control Sample Total/NA Water 1633 844272LCSD 320-844272/4-A Lab Control Sample Dup Total/NA Water 1633 844272LLCS 320-844272/2-A Lab Control Sample Total/NA Prep Batch: 844949 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Solid 1633 Shake320-120292-1 CORMAS-25-A001 Total/NA Solid 1633 Shake320-120292-2 CORMAS-25-A002 Total/NA Solid 1633 Shake320-120292-3 CORMAS-25-S003 Total/NA Solid 1633 Shake320-120292-4 CORMAS-25-S002 Total/NA Solid 1633 Shake320-120292-5 CORMAS-25-S004 Total/NA Solid 1633 Shake320-120292-6 CORMAS-25-S001 Total/NA Solid 1633 Shake320-120292-7 CORMAS-25-A005 Total/NA Solid 1633 Shake320-120292-8 CORMAS-25-A003 Total/NA Solid 1633 Shake320-120292-9 CORMAS-25-S005 Total/NA Solid 1633 Shake320-120292-10 CORMAS-25-A004 Total/NA Solid 1633 ShakeMB 320-844949/1-A Method Blank Total/NA Solid 1633 ShakeLCS 320-844949/3-A Lab Control Sample Total/NA Solid 1633 ShakeLCSD 320-844949/4-A Lab Control Sample Dup Total/NA Solid 1633 ShakeLLCS 320-844949/2-A Lab Control Sample Total/NA Analysis Batch: 845256 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Solid 1633 844949320-120292-1 CORMAS-25-A001 Total/NA Solid 1633 844949320-120292-2 CORMAS-25-A002 Total/NA Solid 1633 844949320-120292-3 CORMAS-25-S003 Total/NA Solid 1633 844949320-120292-4 CORMAS-25-S002 Total/NA Solid 1633 844949320-120292-5 CORMAS-25-S004 Total/NA Solid 1633 844949320-120292-6 CORMAS-25-S001 Total/NA Solid 1633 844949320-120292-7 CORMAS-25-A005 Total/NA Solid 1633 844949320-120292-8 CORMAS-25-A003 Total/NA Solid 1633 844949320-120292-9 CORMAS-25-S005 Total/NA Solid 1633 844949320-120292-10 CORMAS-25-A004 Total/NA Solid 1633 844949MB 320-844949/1-A Method Blank Total/NA Solid 1633 844949LCS 320-844949/3-A Lab Control Sample Total/NA Eurofins Sacramento Page 54 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QC Association Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport LCMS (Continued) Analysis Batch: 845256 (Continued) Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Solid 1633 844949LCSD 320-844949/4-A Lab Control Sample Dup Total/NA Solid 1633 844949LLCS 320-844949/2-A Lab Control Sample Total/NA General Chemistry Analysis Batch: 844782 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch Solid 1633320-120292-3 CORMAS-25-S003 Total/NA Solid 1633320-120292-4 CORMAS-25-S002 Total/NA Solid 1633320-120292-5 CORMAS-25-S004 Total/NA Solid 1633320-120292-6 CORMAS-25-S001 Total/NA Solid 1633320-120292-9 CORMAS-25-S005 Total/NA Solid 1633320-120292-6 DU CORMAS-25-S001 Total/NA Eurofins Sacramento Page 55 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Lab Chronicle Client: City of Renton Job ID: 320-120292-1 Project/Site: Renton Airport Client Sample ID: CORMAS-25-A001 Lab Sample ID: 320-120292-1 Matrix: SolidDate Collected: 04/02/25 09:00 Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.02 g 5.0 mL Analysis 1633 1 845256 04/10/25 12:28 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-A002 Lab Sample ID: 320-120292-2 Matrix: SolidDate Collected: 04/02/25 11:01 Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.00 g 5.0 mL Analysis 1633 1 845256 04/10/25 12:44 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-S003 Lab Sample ID: 320-120292-3 Matrix: SolidDate Collected: 04/02/25 12:15 Date Received: 04/03/25 09:15 Analysis 1633 JCB04/08/25 12:261 EET SAC844782 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Client Sample ID: CORMAS-25-S003 Lab Sample ID: 320-120292-3 Matrix: SolidDate Collected: 04/02/25 12:15 Percent Solids: 88.3Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.36 g 5.0 mL Analysis 1633 1 845256 04/10/25 13:01 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-S002 Lab Sample ID: 320-120292-4 Matrix: SolidDate Collected: 04/02/25 11:20 Date Received: 04/03/25 09:15 Analysis 1633 JCB04/08/25 12:261 EET SAC844782 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Client Sample ID: CORMAS-25-S002 Lab Sample ID: 320-120292-4 Matrix: SolidDate Collected: 04/02/25 11:20 Percent Solids: 78.5Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.54 g 5.0 mL Analysis 1633 1 845256 04/10/25 13:17 SEY EET SACTotal/NA Eurofins Sacramento Page 56 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Lab Chronicle Client: City of Renton Job ID: 320-120292-1 Project/Site: Renton Airport Client Sample ID: CORMAS-25-S004 Lab Sample ID: 320-120292-5 Matrix: SolidDate Collected: 04/02/25 13:05 Date Received: 04/03/25 09:15 Analysis 1633 JCB04/08/25 12:261 EET SAC844782 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Client Sample ID: CORMAS-25-S004 Lab Sample ID: 320-120292-5 Matrix: SolidDate Collected: 04/02/25 13:05 Percent Solids: 89.0Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.20 g 5.0 mL Analysis 1633 1 845256 04/10/25 13:34 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-S001 Lab Sample ID: 320-120292-6 Matrix: SolidDate Collected: 04/02/25 10:25 Date Received: 04/03/25 09:15 Analysis 1633 JCB04/08/25 12:261 EET SAC844782 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Client Sample ID: CORMAS-25-S001 Lab Sample ID: 320-120292-6 Matrix: SolidDate Collected: 04/02/25 10:25 Percent Solids: 90.4Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.26 g 5.0 mL Analysis 1633 1 845256 04/10/25 13:50 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-A005 Lab Sample ID: 320-120292-7 Matrix: SolidDate Collected: 04/02/25 11:57 Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.06 g 5.0 mL Analysis 1633 1 845256 04/10/25 14:39 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-A003 Lab Sample ID: 320-120292-8 Matrix: SolidDate Collected: 04/02/25 11:57 Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.02 g 5.0 mL Analysis 1633 1 845256 04/10/25 14:56 SEY EET SACTotal/NA Eurofins Sacramento Page 57 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Lab Chronicle Client: City of Renton Job ID: 320-120292-1 Project/Site: Renton Airport Client Sample ID: CORMAS-25-S005 Lab Sample ID: 320-120292-9 Matrix: SolidDate Collected: 04/02/25 14:00 Date Received: 04/03/25 09:15 Analysis 1633 JCB04/08/25 12:261 EET SAC844782 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA Client Sample ID: CORMAS-25-S005 Lab Sample ID: 320-120292-9 Matrix: SolidDate Collected: 04/02/25 14:00 Percent Solids: 75.7Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.63 g 5.0 mL Analysis 1633 1 845256 04/10/25 15:12 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-A004 Lab Sample ID: 320-120292-10 Matrix: SolidDate Collected: 04/02/25 13:00 Date Received: 04/03/25 09:15 Prep 1633 Shake CGL04/09/25 06:19 EET SAC844949 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 2.05 g 5.0 mL Analysis 1633 1 845256 04/10/25 15:29 SEY EET SACTotal/NA Client Sample ID: CORMAS-25-W003 Lab Sample ID: 320-120292-11 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 Prep 1633 MKC04/04/25 11:20 EET SAC844272 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 141.5 mL 5.0 mL Analysis 1633 1 844869 04/08/25 13:21 S1M EET SACTotal/NA Client Sample ID: CORMAS-25-W004 Lab Sample ID: 320-120292-12 Matrix: WaterDate Collected: 04/02/25 13:08 Date Received: 04/03/25 09:15 Prep 1633 MKC04/04/25 11:20 EET SAC844272 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 142.6 mL 5.0 mL Analysis 1633 1 844869 04/08/25 13:37 S1M EET SACTotal/NA Client Sample ID: CORMAS-25-W002 Lab Sample ID: 320-120292-13 Matrix: WaterDate Collected: 04/02/25 10:25 Date Received: 04/03/25 09:15 Prep 1633 MKC04/04/25 11:20 EET SAC844272 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 114.2 mL 5.0 mL Analysis 1633 1 844869 04/08/25 13:53 S1M EET SACTotal/NA Eurofins Sacramento Page 58 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Lab Chronicle Client: City of Renton Job ID: 320-120292-1 Project/Site: Renton Airport Client Sample ID: CORMAS-25-W001 Lab Sample ID: 320-120292-14 Matrix: WaterDate Collected: 04/02/25 09:00 Date Received: 04/03/25 09:15 Prep 1633 MKC04/04/25 11:20 EET SAC844272 Type Batch Method Batch Prep Type LabAnalystRun Prepared or Analyzed Initial Amount Amount Final Batch NumberFactor Dil Total/NA 101.9 mL 5.0 mL Analysis 1633 1 844869 04/08/25 14:10 S1M EET SACTotal/NA Laboratory References: EET SAC = Eurofins Sacramento, 880 Riverside Parkway, West Sacramento, CA 95605, TEL (916)373-5600 Eurofins Sacramento Page 59 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Accreditation/Certification Summary Client: City of Renton Job ID: 320-120292-1 Project/Site: Renton Airport Laboratory: Eurofins Sacramento Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below. Authority Program Identification Number Expiration Date Washington State C581 05-05-25 The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which the agency does not offer certification. Analysis Method Prep Method Matrix Analyte 1633 Solid Percent Moisture 1633 Solid Percent Solids Eurofins Sacramento Page 60 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Method Summary Job ID: 320-120292-1Client: City of Renton Project/Site: Renton Airport Method Method Description LaboratoryProtocol EPA1633Per- and Polyfluoroalkyl Substances by LC/MS/MS EET SAC EPA1633Percent Moisture EET SAC EPA1633Solid-Phase Extraction (SPE)EET SAC EPA1633 Shake Shake Extraction with SPE EET SAC Protocol References: EPA = US Environmental Protection Agency Laboratory References: EET SAC = Eurofins Sacramento, 880 Riverside Parkway, West Sacramento, CA 95605, TEL (916)373-5600 Eurofins Sacramento Page 61 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Sample Summary Client: City of Renton Job ID: 320-120292-1 Project/Site: Renton Airport Lab Sample ID Client Sample ID Matrix Collected Received 320-120292-1 CORMAS-25-A001 Solid 04/02/25 09:00 04/03/25 09:15 320-120292-2 CORMAS-25-A002 Solid 04/02/25 11:01 04/03/25 09:15 320-120292-3 CORMAS-25-S003 Solid 04/02/25 12:15 04/03/25 09:15 320-120292-4 CORMAS-25-S002 Solid 04/02/25 11:20 04/03/25 09:15 320-120292-5 CORMAS-25-S004 Solid 04/02/25 13:05 04/03/25 09:15 320-120292-6 CORMAS-25-S001 Solid 04/02/25 10:25 04/03/25 09:15 320-120292-7 CORMAS-25-A005 Solid 04/02/25 11:57 04/03/25 09:15 320-120292-8 CORMAS-25-A003 Solid 04/02/25 11:57 04/03/25 09:15 320-120292-9 CORMAS-25-S005 Solid 04/02/25 14:00 04/03/25 09:15 320-120292-10 CORMAS-25-A004 Solid 04/02/25 13:00 04/03/25 09:15 320-120292-11 CORMAS-25-W003 Water 04/02/25 13:08 04/03/25 09:15 320-120292-12 CORMAS-25-W004 Water 04/02/25 13:08 04/03/25 09:15 320-120292-13 CORMAS-25-W002 Water 04/02/25 10:25 04/03/25 09:15 320-120292-14 CORMAS-25-W001 Water 04/02/25 09:00 04/03/25 09:15 Eurofins Sacramento Page 62 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Page 63 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Page 64 of 64 4/10/2025 1 2 3 4 5 6 7 8 9 10 11 12 13 14