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Home My WebLink AboutRS_601 Monster Rd Renton CAP Request180703.pdf Two Union Square 601 Union Street, Suite 600 Seattle, WA 98101 tel: 206.292.2078 fax: 206.682.7867 N:\DCT Renton\08 Task 2 AOC4 Remediation and Constr Support\City of Renton\Monster Rd Renton CAP Request 2018_0703.docx Page 1 of 2 Memorandum To: Jill Ding, City of Renton Copies: Ben Brodsky and Justin Kirk, DCT Industrial; Brian Ludwig and Steve Nelson, Innova Architects From: Brett Beaulieu Date: July 3, 2018 Re: Request for Cleanup Action Plan Second “On Hold” Notice 601 Monster Rd / LUA18-000237 SA-A, ECF, MOD, MOD This memorandum is intended to respond to a request made by the City of Renton in a June 27, 2018, letter for additional information concerning the master application for the 601 Monster Road project. In item #1, the City of Renton requested “a Cleanup Action Plan regarding the soil contamination undergoing cleanup on the project site.” The Monster Road site is being cleaned up under the Washington Model Toxics Control Act (MTCA) through the Voluntary Cleanup Program (VCP) overseen by the Department of Ecology (Ecology). A cleanup action in the VCP program meets regular MTCA cleanup standards but is done independently, and a Cleanup Action Plan (CAP) is not required. Instead, the required documentation for the cleanup is submitted as a package for review, typically after the cleanup takes place, and Ecology issues an opinion about the site status. In November, 2017, DCT Industrial (DCT) with Floyd|Snider as its consultant met with the VCP Program Supervisor, Louise Bardy, and discussed DCT’s proposed approach to cleaning up the site through the VCP. Ecology voiced its support for this approach, which is based on prior data collection from investigation and cleanup work on areas of concern (AOCs) on the west portion of the site, referred to as AOC1 and AOC2; and on more recent data collected since 2014 that included identification of a new area of contamination at the northwest corner of the existing building, referred to as AOC4. These areas are shown on the figure included as Attachment 1. AOC1 AND AOC2 The approach for AOC1 and AOC2, which are not expected to be disturbed during redevelopment construction, consists of regular groundwater monitoring and soil borings if necessary to confirm compliance with cleanup levels. The site was listed on the Confirmed or Suspected Contaminated Sites List database in 1998 for groundwater contamination in this area of the site, and was also Jill Ding July 3, 2018 N:\DCT Renton\08 Task 2 AOC4 Remediation and Constr Support\City of Renton\Monster Rd Renton CAP Request 2018_0703.docx Request for CAP Page 2 of 2 listed on Ecology’s Leaking Underground Storage Tank database. A Cleanup Site ID of 11481 was assigned. Several reports were submitted to Ecology in the 1990s related to soil and groundwater contamination identified during decommissioning of a former oil/water separator and installation of a new oil water separator and new sanitary sewer lift station. Contaminated soil was excavated and transported off-site for disposal in 1993. Groundwater monitoring was conducted beginning in the mid-1990s. More recent data was collected by the previous owner between 2014 and 2017, and additional soil excavation, removal of subgrade features, and addition of oxygen-releasing compounds to stimulate bioremediation were completed in 2015. DCT has collected two quarters of groundwater data from AOC1 and AOC2 in 2018. Contaminants of potential concern include petroleum hydrocarbons and selected volatile organic compounds (VOCs). Data collected so far suggests prior cleanup of this area has worked and supports the approach of monitoring until compliance can be demonstrated. No free-phase product has been measured on the groundwater surface. AOC4 Recent data also indicated a new area of contamination at the site (referred to as AOC4) near the northeast building corner. Trichloroethene (TCE) and related constituents cis-1,2-dichloroethene and vinyl chloride were detected at low concentrations exceeding MTCA Method A cleanup standards for groundwater, soil, and/or soil vapor in this area. Data collected during the property transaction due diligence has delineated the extent of the soil, groundwater and soil vapor contamination in AOC4. Remedial actions planned for AOC4 include complete soil and groundwater removal and associated compliance monitoring. Details on the remedial action planned are provided in the plan sheets included as Attachment 2. DCT plans to complete this additional independent cleanup action in AOC4 as part of its redevelopment of the property, and continue regular groundwater monitoring throughout the project. DCT will use data from prior reports and new data generated as part of the remedial action to prepare a remedial investigation/feasibility study (RI/FS) and related documentation that will be submitted under the VCP with a request for a no further action (NFA) opinion. The information required for a CAP will be included in the VCP submittal package. ATTACHMENTS 1 Figure 3.1 Areas of Concern and Sampling Locations 2 Sheets X1.0 through X5.0 Monster Road Site Soil and Groundwater Remediation Attachment 1 Figure 3.1 Areas of Concern and Sampling Locations HHHHHH HHXW &<&< &< &< &< &< &< &< &< &< &< &<   &< &< &<&< &< !( !( !( !( !( !( !( !( !( !( !( !( K / P C o r p o r a t i o n S e a t t l e A r e aP i p e Tr a d e sE d u c a t i o n C e n t e r E x i s t i n g P o n d HK i n g C o u n t yS o u t h Tr e a t m e n tP l a n t K i n g C o u n t y B l a c k R i v e r P u m p S t a t i o n W e s c o?Infe r r e d G r o u n d w a t e r F l o w D i r e c t i o n Jan u a r y 2 3 , 2 0 1 7 AOC1 AOC2 AOC4 MW-7 SB28 FMW-01 AOC4-MW01 FMW-02 KMW-05 KMW-01 KMW-03 FMW-03 AOC4-MW3 AOC4-MW2 OSW-SE OWS-NE SB29 KMW-02 AOC4-PZ2 AOC4-PZ1 SS3 I:\GIS\Projects\DCT-Renton\MXD\SAPQAPP\Figure 3.1 Areas of Concern and Sampling Locations.mxd1/23/2018 Figure 3.1Areas of Concern andSampling Locations Sampling and Analysis Plan/Quality Assurance Project Plan601 Monster Road SiteRenton, Washington Legend Property Easement1 Site Parcel Extent of Excavation 1993 Extent of Excavation 2015 Planned New Landscaping Planned New Building Footprint !( Approximate Post-ExcavationSoil Sampling Location Approximate Excavation Area Approximate Excavation Bottom &<Planned Deep Monitoring Well &<Planned Shallow Monitorning Well &<Existing Monitoring Well or Piezometer Existing Soil Boring or Soil Sample Location XW Existing Subslab Vapor Location ¹0 100 20050 Scale in Feet Notes:1. An easement of access and utilities recorded June 28, 1990 as recording no. 9006281428 (Terramark 2015). · Orthoimage provided by nearmap, 2017. Abbreviations: AOC = Area of concern MTCA = Model Toxics Control Act = Exceeds Screening Level for Groundwater and Soil = Exceeds Screening Level for Groundwater = Exceeds Screening Level for Soil = Exceeds Screening Level for Soil Vapor ; ; ; ; &< &<    &< AOC2 WSV-Base N KMW-01 KMW-03 WSV-SW WSV-SE WSV-Base S WSV-E-4.0WSV-W-8.0 WSV-W-4.0 SB36 WSV-N-8.0 WSV-N-4.0 SB32 SB31 KMW-02H Attachment 2 Sheets X1.0 through X5.0 Monster Road Site Soil and Groundwater Remediation E:\Project\clients\Floyd and Snider\2018\DCT Monster Road\DCT_0001.dwg BTSBBBBBBMONSTER ROAD SITE SOIL AND GROUNDWATER REMEDIATIONXXXXXXXX4/17/2018OF 5DCT Industrial, Inc.DRAFTKITSAP DCT INDUSTRIAL, INC.MONSTER ROAD SITESOIL AND GROUNDWATER REMEDIATIONPENDSANJAUNSKAGITSTEVENSCLALLAMJEFFERSONKINGDOUGLASMASONGRAYSHARBORTHURSTONPACIFICWAHKIAKUMCOWLITZSKAMANIAKLICKITATCLARKBENTONWALLA WALLAASOTINLEWISYAKIMACOLUMBIAPIERCEFRANKLINGARFIELDKITTITASGRANTADAMSWHITMANLINCOLNSPOKANESNOHOMISHCHELANWHATCOMOKANOGANFERRYOREILLEISLAND167405SEATTLERENTON1COVER SHEETX1.0 E:\Project\clients\Floyd and Snider\2018\DCT Monster Road\DCT_0001.dwg BTSBBBBBBMONSTER ROAD SITE SOIL AND GROUNDWATER REMEDIATIONXXXXXXXX4/17/2018OF 5DCT Industrial, Inc.DRAFT2GENERAL NOTES AND SPECIFICATIONSSECTION 02300 EARTHWORKX2.0GENERAL NOTES1.THE MONSTER ROAD SITE SOIL AND GROUNDWATER REMEDIATION PROJECT IS PART OFTHE DCT MONSTER ROAD DISTRIBUTION CENTER REDEVELOPMENT PROJECT FOR THEPROPERTY INVOLVING DEMOLITION AND CONSTRUCTION OF A NEW STRUCTURE.CONTRACTOR SHALL MEET ALL REQUIREMENTS FOR THE REDEVELOPMENT PROJECT INADDITION TO REQUIREMENTS OF THE REMEDIATION PROJECT. IN CASES OF APPARENTCONFLICTING REQUIREMENTS, IT IS CONTRACTOR’S RESPONSIBILITY TO CHECK WITHENGINEER FOR RESOLUTION.2.PROJECT DATUM AND SURVEY CONTROL: REFER TO BOUNDARY AND TOPOGRAPHICSURVEY BY BARGHAUSEN CONSULTING ENGINEERS, INC. CONDUCTED NOVEMBER, 2017. ALLSURVEYING AND STAKING REQUIRED DURING CONSTRUCTION SHALL BE PERFORMED BYCONTRACTOR.3.FIELD SURVEY WAS USED TO DEVELOP TOPOGRAPHICAL PLANS FOR THE AREA WHERECONSTRUCTION IS TO BE PERFORMED. EXISTING UNDERGROUND UTILITIES HAVE BEENSHOWN TO ASSIST THE CONTRACTOR IN LOCATING UNDERGROUND FACILITIIES IN THEFIELD. OTHER UNKNOWN UTILITIES MAY EXIST. IT IS THE SOLE RESPONSIBILITY OF THECONTRACTOR TO DETERMINE UTILITY LOCATIONS WHICH MAY BE AFFECTED BY THEIMPLEMENTATION OF THESE PLANS. CONTRACTOR SHALL USE A PRIVATE UTILITY LOCATIONSERVICE FOR ALL AREAS REQUIRING EXCAVATION AND MAINTAIN DOCUMENTATION OF ALLLOCATES. CONTRACTOR SHALL INFORM ENGINEER OF ANY POTENTIAL CONFLICTS ORINTERFERENCES FOR RESOLUTION PRIOR TO PERFORMING EXCAVATION.4.THE CONTRACTOR SHALL SECURE THE WORK AREA LIMITS WITH FENCING AS NECESSARYTO ENSURE PUBLIC SAFETY.5.GENERAL TESC REQUIREMENTS APPLICABLE TO THE REMEDIATION PROJECT ARE PROVIDEDIN REDEVELOPMENT PROJECT DRAWINGS AND SPECIFICATIONS. REFER TO THEREDEVELOPMENT PROJECT DRAWINGS AND SPECIFICATIONS AND STORMWATERPOLLUTION PREVENTION PLAN FOR POTENTIALLY APPLICABLE TESC REQUIREMENTS. INADDITION, SPECIFIC TESC MEASURES FOR THE REMEDIATION PROJECT ARE INCLUDED INPROJECT DRAWINGS AND SPECIFICATIONS IN THIS SET. REFER TO THE APPLICABLEDRAWINGS IN THIS SET AND PROJECT SPECIFICATIONS FOR REQUIREMENTS THAT ARECONSIDERED THE MINIMUM TESC FEATURES REQUIRED DURING CONSTRUCTION.6.PROVIDE AND MAINTAIN TESC BMP'S TO ENSURE THAT SEDIMENT-LADEN WATER DOES NOTENTER THE NATURAL OR PIPED DRAINAGE SYSTEM. PROVIDE AND MAINTAIN TESC BMPS,SUCH AS WATTLES OR SILT FENCE, TO ENSURE SEDIMENT IN STORMWATER CONTACTINGDISTURBED SOIL WITHIN THE EXCLUSION ZONE IS CONTAINED WITHIN THE EXCAVATIONBOUNDARY AND DOES NOT CONTACT NON-CONTAMINATED SOIL OUTSIDE OF EXCAVATIONBOUNDARY. AS CONSTRUCTION PROGRESSES AND SEASONAL CONDITIONS DICTATE, MORETESC FACILITIES MAY BE REQUIRED TO ENSURE COMPLETE EROSION AND SEDIMENTCONTROL DURING THE PROJECT. DURING THE COURSE OF CONSTRUCTION, IT SHALL BETHE OBLIGATION AND RESPONSIBILITY OF CONTRACTOR TO ADDRESS ANY NEWCONDITIONS THAT MAY BE CREATED BY CONTRACTOR'S ACTIVITIES AND TO PROVIDEADDITIONAL TESC FACILITIES THAT MAY BE NEEDED TO PROTECT ADJACENT LAND ANDEXISTING DRAINAGE FEATURES. REMOVE TESC FACILITIES AT COMPLETION OF THEPROJECT.7.KEEP STREETS AND EXISTING PAVED SURFACES THAT ARE OPEN TO TRAFFIC CLEAN AT ALLTIMES BY SWEEPING. WASHING AND/OR USE OF A WATER TRUCK TO CLEAN PAVED AREAS ISNOT ALLOWED UNLESS WRITTEN PERMISSION IS OBTAINED FROM ENGINEER.8.EXCEPT AS NOTED FOR DECOMMISSIONED UTILITIES, DECOMMISSIONED MONITORINGWELLS, AND CONCRETE TO BE REMOVED PRIOR TO EXCAVATION, ALL EXISTING FEATURESTHAT ARE DAMAGED BY NEW CONSTRUCTION OR CONTRACTOR'S ACTIVITIES, SHALL BEREPAIRED BY CONTRACTOR AT NO ADDITIONAL COST.9.THE TESC BMP'S SHALL BE INSPECTED DAILY BY THE CONTRACTOR AND MAINTAINED TOENSURE CONTINUED PROPER FUNCTIONALITY. WRITTEN RECORDS SHALL BE KEPT OFWEEKLY REVIEWS OF THE TESC FACILITIES. ANY PROBLEMS AND/OR CHANGES SHALL BEIMMEDIATELY COMMUNICATED TO THE ENGINEER.10.ANY AREAS OF EXPOSED SOILS, INCLUDING EMBANKMENTS, CUT SLOPES, SOIL STOCKPILES,ETC., THAT WILL NOT BE DISTURBED FOR FORTY-EIGHT (48) HOURS DURING THE WETSEASON OR SEVEN (7) DAYS DURING THE DRY SEASON SHALL BE IMMEDIATELY STABILIZEDWITH THE APPROVED TESC METHODS (E.G., PLASTIC COVERING, ETC.).CONSTRUCTION SEQUENCE FOR TESC:1.KICKOFF MEETING.2.INSTALL HIGH VISIBILITY FENCING AROUND EXCAVATION AREA TO DEFINE EXCLUSION ZONE3.POST SIGN WITH NAME AND PHONE NUMBER OF CERTIFIED TESC LEAD.4.GRADE AND INSTALL CONSTRUCTION ENTRANCE(S)5.INSTALL DRY DECON STATION AT EGRESS POINT OF EXCLUSION ZONE.6.INSTALL PERIMETER PROTECTION (SILT FENCE, ETC.).7.INSTALL CATCH BASIN INLET PROTECTION IN EXCLUSION ZONES PRIOR TO EXCAVATION.8.MAINTAIN AND/OR ADD TESC BMP'S AS REQUIRED DUE TO SITE CHANGES IN ACCORDANCEWITH THE REDEVLOPMENT PROJECT DRAWINGS AND SPECIFICATIONS9.COVER ALL AREAS WITH TESC FEATURES THAT WILL BE UNWORKED FOR MORE THAN SEVENDAYS DURING THE DRY SEASON OR TWO DAYS DURING THE WET SEASON, UNLESSDIRECTED OTHERWISE BY THE ENGINEER.10.STABILIZE ALL AREAS THAT REACH FINAL GRADE WITHIN SEVEN DAYS.11.UPON COMPLETION OF THE PROJECT, ALL DISTURBED AREAS SHALL BE STABILIZED ANDTEMP TESC BMP'S SHALL BE REMOVED.SPECIFICATIONSSECTION 02300 - EARTHWORKPART 1 - GENERAL1.01 SUMMARYA.EXTENT OF WORK: THE WORK INCLUDES THE REQUIREMENTS FOREXCAVATING, BACKFILLING, AND GRADING. THE EXTENT AND LOCATION OFTHE “EARTHWORK” IS INDICATED ON THE PLANS, DETAILS, AND SECTIONS1.02 REFERENCESA.WASHINGTON STATE DEPARTMENT OF TRANSPORTATION (WSDOT): STANDARDSPECIFICATIONS FOR ROAD, BRIDGE, AND MUNICIPAL CONSTRUCTION, 2016.B.TERRA ASSOCIATES, INC. GEOTECHNICAL REPORT, 605 MONSTER ROAD SW, RENTON,WASHINGTON, SEPTEMBER 26, 2017.1.03 DEFINITIONSA.CLEAN OVERBURDEN: EXCAVATED SOIL MATERIAL FROM THE SITE THAT IS REUSED FORFILL OR BACKFILL WITHIN THE EXCAVATION AREA WITH ENGINEER AND GEOTECHNICALENGINEER APPROVAL.B.STRUCTURAL FILL: IMPORTED BORROW MATERIAL MEETING THE REQUIREMENTS OF WETWEATHER STRUCTURAL FILL IN THE TERRA ASSOCIATES GEOTECHNICAL REPORT1.04 QUALITY ASSURANCEA.INSPECTION AND TESTING: SAMPLING AND TESTING OF MATERIALS AND INSTALLATIONSSHALL BE PERFORMED BY THE CONTRACTOR. TESTS, TESTING METHODS, AND RESULTSSHALL BE AS SPECIFIED IN THE PERTINENT SECTIONS OF THE WSDOT STANDARDSPECIFICATIONS AND TERRA ASSOCIATES GEOTECHNICAL REPORT.1.05 SUBMITTALSA.SUBMIT THE FOLLOWING:1. STRUCTURAL FILL MATERIAL SIEVE ANALYSIS.2. QUARRY SPALL SIEVE ANALYSIS3. COMPACTION CONTROL TESTING RESULTS.4. CHARACTERIZATION OF IMPORT MATERIAL: BEFORE BRINGING TO THE SITE, PERFORM,PAY FOR, AND SUBMIT TEST REPORTS FOR ALL IMPORTED MATERIALS IN ACCORDANCEWITH THE OFF-SITE BORROW SOURCE CHARACTERIZATION AND CHARACTERIZATIONTESTING, REPORTING, AND CERTIFICATION REQUIREMENTS SPECIFIED HEREIN.5. SOIL HANDLING AND TEMPORARY STOCKPILING PLAN - SUBMIT A DESCRIPTION OF THEPROPOSED PLAN FOR EXCAVATIONS, HANDLING AND STOCKPILING. INCLUDE DESCRIPTIONOF INTENDED LOCATION(S) OF STOCKPILES RELATIVE TO THE SEQUENCING ANDSCHEDULING OF WORK IN THE CONTRACTOR'S WORK AREA THROUGHOUTCONSTRUCTION. THIS SUBMITTAL IS FOR THE OWNERS GENERAL INFORMATION AND IN NOWAY RELIEVES THE CONTRACTOR OF COMPLETE RESPONSIBILITY FOR THE SUCCESSFULPERFORMANCE OF THE WORK.6. DECONTAMINATION PLAN - SUBMIT A PLAN FOR HAUL TRUCK TRAFFIC THAT WILL ENTERTHE EXCLUSION ZONE AND DECONTAMINATION AREAS. INCLUDE TRUCK INGRESS/EGRESS,TRUCK ROUTE, EXCLUSION ZONE, LOADING ZONE, DRY DECONTAMINATION ZONE, WATERTANKS, AND QUARRY SPALLS AREA. REFER TO SECTION 01631 POLLUTION PREVENTIONPLANNING AND EXECUTION FOR ADDITIONAL REQUIREMENTS OF DECONTAMINATION PLAN.7. DISPOSAL FACILITIES. SUBMIT NAMES, LOCATIONS AND CONTACT INFORMATION FORLICENSED SUBTITLE D LANDFILL WHERE CONTAMINATED SOIL WILL BE DISPOSED OF, ANDFOR PERMITTED TREATMENT, STORAGE AND DISPOSAL FACILITY WHERE GROUNDWATERWILL BE DISPOSED OF OR PERMIT FOR SANITARY SEWER WHERE GROUNDWATER WILL BEDISCHARGED.PART 2 - PRODUCTS2.01 GENERALA.ALL GRANULAR MATERIALS SHALL MEET THE APPLICABLE REQUIREMENTS OF WSDOTSTANDARD SPECIFICATIONS FOR ROAD, BRIDGE, AND MUNICIPAL CONSTRUCTION, 2016EDITION.B.OTHER MATERIALS SHALL BE OF THE QUALITY, SIZE, SHAPE, GRADATION, OR EQUAL TOTHE MANUFACTURER AS SPECIFIED HEREIN.C.CHARACTERIZATION TESTING, REPORTING, AND CERTIFICATION FOR IMPORT MATERIALS1. MATERIALS AND PRODUCTS SHALL BE OF THE QUALITY, SIZE, SHAPE, AND GRADATION ASSPECIFIED IN THE CONTRACT DOCUMENTS, OR SHALL BE APPROVED BY THE ENGINEER ASEQUAL.2. PROVIDE AND PAY FOR SOURCE CHARACTERIZATION, TESTING, REPORTING, ANDCERTIFICATION FOR ALL OFF-SITE BORROW MATERIALS AS DESCRIBED BELOW. PROVIDEDOCUMENTATION FOR THE ENGINEER'S APPROVAL DEMONSTRATING THAT ALL IMPORTEDMATERIALS FROM A BORROW PIT MEET THE CONTRACT REQUIREMENTS AND CERTIFY THATTHE MATERIALS ARE FREE OF REGULATED MATERIALS.3. REGULATED MATERIALS ARE DEFINED AS MATERIALS OR COMBINATIONS OF MATERIALSCONTAINING HAZARDOUS OR DANGEROUS WASTES AS DEFINED UNDER STATE LAWS,FEDERAL LAWS, OR UNDER THE MODEL TOXICS CONTROL ACT LISTED IN WAC 173-340-900,TABLE 740-1, WHICH EXCEED THE METHOD A CLEANUP LEVELS FOR UNRESTRICTED LANDUSE.CHARACTERIZATION TESTING SHALL BE CONDUCTED AT A LABORATORY ACCREDITEDUNDER WAC CHAPTER 173-50 AND SHALL INCLUDE THE FOLLOWING. PROVIDE THE NAME OFTHE MATERIAL SOURCE WITH EACH SAMPLE SUBMITTED.* GRAIN SIZE DISTRIBUTION / SIEVE ANALYSIS (ASTM D 422)* MAXIMUM DRY DENSITY (ASTM D 1557)* PRIORITY POLLUTANT METALS (EPA SW 846 6010/6020/7041)* VOLATILE ORGANIC COMPOUNDS (EPA SW 846 8260)* SEMI-VOLATILE ORGANIC COMPOUNDS (EPA SW 846 8270)* PCBS AND PESTICIDES (EPA SW 846 8080)* PETROLEUM HYDROCARBONS (NWTPH-HCID)2.02 CLEAN OVERBURDENA.CLEAN OVERBURDEN MATERIAL IS LOCATED BENEATH ORGANIC TOPSOIL AT SURFACE OFEXCAVATION TO A DEPTH OF 4 FEET. CLEAN OVERBURDEN SHALL NOT BE REMOVEDFROM THE SITE UNLESS AS DIRECTED BY ENGINEER. CLEAN OVERBURDEN MATERIALSHALL BE STOCKPILED WITHIN THE EXCLUSION ZONE FOR POTENTIAL RE-USE ASBACKFILL. EXCAVATED MATERIAL REUSED AS FILL OR BACKFILL SHALL BE NATIVE, IN-SITUEXCAVATED MATERIAL WITH SUITABLE MOISTURE CONTENT SUBJECT TO ENGINEERAPPROVAL AND IN ACCORDANCE WITH THE RECOMMENDATIONS IN THE TERRAASSOCIATES GEOTECHNICAL REPORT.2.03 STRUCTURAL FILL/BACKFILLA.STRUCTURAL FILL/BACKFILL MATERIAL SHALL BE IMPORTED MATERIAL MEETING GRADINGREQUIREMENTS FOR WET WEATHER STRUCTURAL FILL AS OUTLINED IN THE TERRAASSOCIATES GEOTECHNICAL REPORT AND SHALL BE CLEAN, FREE-DRAINING, ANDOBTAINED FROM NATURAL DEPOSITS. INDIVIDUAL PARTICLES SHALL BE FREE FROM ALLOBJECTIONABLE COATING. THE MATERIAL SHALL CONTAIN NO ORGANIC MATTER OR SOFTFRIABLE PARTICLES IN QUANTITIES CONSIDERED OBJECTIONABLE BY THE ENGINEER.2.04 QUARRY SPALLSA.WHERE BOTTOM OF EXCAVATION ENCOUNTERS GROUNDWATER, PLACE QUARRY SPALLSTO EXTEND MINIMUM 1 FOOT ABOVE GROUND WATER LEVEL. ALL QUARRY SPALLMATERIALS SHALL BE WASHED PRIOR TO DELIVERY TO THE SITE AND MEET THEREQUIREMENTS OF WSDOT STANDARD SPECIFICATIONS, SECTION 9-13.1.2.05 GEOTEXTILE - PLACED OVER QUARRY SPALLSA.MATERIAL SHALL BE A NONWOVEN GEOTEXTILE IN ACCORDANCE WITH WSDOT STANDARDSPECIFICATIONS, SECTION 9-33 FOR SEPARATION APPLICATION REFER TO TABLE 3 OFSECTION 9-33.1 FOR MINIMUM REQUIREMENTS.PART 3 - EXECUTION3.01 GENERALA.EXCAVATIONS, FILLING, BACKFILLING, GRADING AND OTHER WORK ACTIVITIESASSOCIATED WITH EARTHWORK ON THIS PROJECT SHALL BE IN ACCORDANCE WITH THERECOMMENDATIONS OUTLINED IN THE TERRA ASSOCIATES GEOTECHNICAL REPORT.B.CONTRACTOR SHALL PROVIDE, CONSTRUCT, MAINTAIN AND REMOVE SAFETY SYSTEMS ASREQUIRED FOR EXCAVATIONS. SAFETY SYSTEMS SHALL MEET REQUIREMENTS OF THEWASHINGTON INDUSTRIAL SAFETY AND HEALTH ACT (WISHA), RCW 49.17, WASHINGTONADMINISTRATIVE CODE (WAC) 296-24, 296-62, & 296-155, AND EM-385-1-1 COE SAFETYMANUAL. MOST STRINGENT REQUIREMENTS GOVERN.3.02 EXCAVATIONA.EXCAVATION SHALL BE IN ACCORDANCE WITH APPLICABLE REQUIREMENTS OF WSDOTSTANDARD SPECIFICATIONS, SECTION 2-03. THE EXCAVATION SHALL BE ACCOMPLISHED INACCORDANCE WITH THE SPECIFICATION REQUIREMENTS AND MAY INCLUDE INCIDENTALWORK INCLUDING, BUT NOT LIMITED TO, REMOVAL OF EXISTING UTILITIES, PAVEMENT,STRUCTURES OR PORTIONS THEREOF; CONSTRUCTION AND SUBSEQUENT REMOVAL OFPROTECTION OF EXCAVATED MATERIALS FROM THE WEATHER; AND PLACEMENT ANDCOMPACTION OF EXCAVATED MATERIAL AS BACKFILL OR FILL.B.DEBRIS HANDLING: CONCRETE AND OTHER DEBRIS REMOVED FROM EXCAVATION AREASSHALL BE REMOVED OF LOOSE SOIL AND SEGREGATED OUTSIDE THE EXCLUSION ZONE.C.PROTECTING STOCKPILES: PLACE EXCAVATED MATERIAL FORMING STOCKPILES ONPLASTIC SHEETING. EXCAVATED MATERIAL STOCKPILED FOR LATER USE AS FILL ORBACKFILL MATERIAL SHALL BE PROTECTED FROM WEATHER DAMAGE BY COVERING WITHWATERPROOF SHEETING OR OTHER MEANS AS NECESSARY. SEE THE GENERAL NOTESAND REDEVELOPMENT PLANS AND SPECIFICATIONS FOR FURTHER REQUIREMENTS.D.THE CONTRACTOR SHALL MAINTAIN AT ALL TIMES DURING EXECUTION OF THIS WORK,SAFE AND STABLE EXCAVATIONS USING OSHA AND WAC 296-155 PART N. IF ACCESS WITHINEXCAVATION IS REQUIRED FOR COMPACTION OR ANALYTICAL TESTING, USE TRENCH BOXOR OTHER SIMILAR MEANS TO PROTECT THE SAFETY OF THE INSPECTOR DUE TO THESTEEPNESS OF THE SIDE WALLS OF THE EXCAVATION.E.TOPSOIL AND CLEAN OVERBURDEN: REMOVE ORGANIC TOPSOIL WITHIN EXCAVATIONAREA AND SEGREGATE. EXCAVATE TO FOUR FEET BGS WITHIN THE EXCAVATION AREAAND STOCKPILE AS CLEAN OVERBURDEN.F.HEALTH AND SAFETY: EXCAVATION AND HANDLING OF CONTAMINATED SOIL ANDHANDLING OF GROUNDWATER RECOVERED FROM THE EXCAVATION SHALL BE PERFORMEDBY HAZWOPER-CERTIFIED PERSONNEL. REFER TO SECTION 01360 FOR ADDITIONAL HEALTHAND SAFETY REQUIREMENTSG.HANDLING AND DISPOSAL OF EXCAVATED CONTAMINATED SOIL: EXCAVATE TO THEMINIMUM HORIZONTAL AND VERTICAL LIMITS DEFINED BY CONTROL POINTS. EXCAVATEDMATERIAL BELOW FOUR FEET BGS MUST BE HANDLED AS CONTAMINATED SOIL. DIRECTLOAD CONTAMINATED SOIL FOR TRANSPORT AND OFFSITE DISPOSAL AT THE APPROVEDLICENSED SUBTITLE D LANDFILL. DEWATER CONTAMINATED SOIL BY DEWATERING THEEXCAVATION AND ALLOWING CONTAMINATED SOIL WITH FREE LIQUIDS TO DRAIN FROM ABENCH WITHIN THE EXCAVATION. LOAD TRUCKS INSIDE THE EXCLUSION ZONE AS SHOWNON PLAN DRAWINGS. DECONTAMINATE TRUCKS WITH DRY DECONTAMINATION MEASURESDESCRIBED IN SECTION 01631 POLLUTION PREVENTION PLANNING BEFORE THEY LEAVETHE EXCLUSION ZONE. COLLECT CONTAMINATED SOIL REMOVED FROM TRUCKS IN THEDRY DECONTAMINATION ZONE FOR OFFSITE DISPOSALH.EXCAVATION DEWATERING: INSTALL A SUMP OR SUMPS INSIDE THE EXCAVATION AREAFOR RECOVERY OF GROUNDWATER. SUMPS SHALL BE INSTALLED NO DEEPER THAN 15FEET BGS WITHOUT ENGINEER APPROVAL. GROUNDWATER RECOVERED FROM THEEXCAVATION MUST BE HANDLED AS CONTAMINATED GROUNDWATER. PUMPGROUNDWATER TO ONSITE STORAGE TANKS AS NEEDED FOR EXCAVATION AND SOILTESTING, AND AS DIRECTED BY ENGINEER, UP TO A MAXIMUM VOLUME OF 60,000 GALLONS.TRANSPORT AND DISPOSE OF CONTAMINATED WATER AT THE APPROVED TSD FACILITY,OR DISCHARGE TO SANITARY SEWER UNDER PERMIT.I.SOIL TESTING. THE ENGINEER WILL COLLECT SAMPLES FROM EXCAVATION SIDEWALLSAND THE EXCAVATION BOTTOM AT THE EXCAVATION LIMITS. MAINTAIN A DEWATEREDEXCAVATION SO THAT THE BOTTOM IS ACCESSIBLE FOR SAMPLING, AND ASSIST ENGINEERWITH SAMPLE COLLECTION USING EXCAVATOR BUCKET. SOIL SAMPLES WILL BESUBMITTED FOR 24-HOUR TURNAROUND. CONTRACTOR SHALL MAINTAIN DEWATEREDEXCAVATION DURING ANALYTICAL TESTING, UNTIL ENGINEER DIRECTS CONTRACTOR TOPROCEED WITH BACKFILL OR OVER-EXCAVATION. THIS IS EXPECTED TO RESULT IN APERIOD OF STAND-BY DURING WHICH NO EARTHWORK IS CONDUCTED.J.PARTIAL EXCAVATION. CONTRACTOR MAY PROPOSE ALTERNATIVE APPROACHES TOEXCAVATION AND DEWATERING FOR ENGINEER CONSIDERATION, INCLUDING EXCAVATION,DEWATERING, AND SOIL TESTING IN SECTIONS.K.OVER-EXCAVATION. ENGINEER MAY DIRECT CONTRACTOR TO EXCAVATE FURTHER BASEDON ANALYTICAL TESTING OF SOIL SAMPLES. LOCATION OF CLEAN SOIL SAMPLES SHOWINGOUTER LIMIT OF POTENTIAL OVER-EXCAVATION IS SHOWN ON PLANS (AOC4-SB01,AOC4-SB03, AOC4-SB04, AOC4-SB05, AOC4-SB10, AOC4-SB11, AOC4-TW01). DEWATERINGWILL BE MAINTAINED AS NECESSARY FOR OVER-EXCAVATION AND ADDITIONAL SOILTESTING.3.03 BACKFILL AND COMPACTIONA.FILL/BACKFILL PLACEMENT AND COMPACTION SHALL BE COMPLETED IN ACCORDANCEWITH RECOMMENDATIONS OUTLINED IN TERRA ASSOCIATES GEOTECHNICAL REPORT.CONTRACTOR SHALL MAXIMIZE BACKFILL WITH CLEAN OVERBURDEN BY USING ALL CLEANOVERBURDEN THAT MEETS REQUIREMENTS IN THE GEOTECHNICAL REPORT AND HASBEEN APPROVED FOR USE.3.04 PLACEMENT OF GEOTEXTILEA.PLACE GEOTEXTILE IN ACCORDANCE WITH MANUFACTURER'S WRITTEN INSTRUCTIONS. MONSTER ROAD SW MONSTER ROAD SWPROPERTY BOUNDARYQUARRY SPALLS ATEXCLUSION ZONEEGRESS(LOCATION MAYVARY)APPROXIMATEEXCLUSION ZONEEXCAVATIONBOTTOMAPPROXEXCAVATIONAREADRYDECONTAMINATIONZONE(LOCATIONMAY VARY)LOADINGZONE(LOCATIONMAY VARY)WATER TANKS(LOCATIONMAY VARY)E:\Project\clients\Floyd and Snider\2018\DCT Monster Road\DCT_0002.dwg BTSBBBBBBMONSTER ROAD SITE SOIL AND GROUNDWATER REMEDIATIONXXXXXXXX4/17/2018OF 5DCT Industrial, Inc.DRAFTPLAN OVERVIEW3X3.0NOTES:1.EXISTING BUILDING TO BE DEMOLISHEDPRIOR TO CONSTRUCTION. CONTRACTORTO ESTABLISH EXCLUSION ZONEBOUNDARY IN DECONTAMINATION PLAN.2.CONFIGURATION OF EXCLUSION ZONE,LOADING ZONE, WATER TANKS, DRYDECONTAMINATION ZONE, AND QUARRYSPALLS MAY VARY BASED ON HAUL TRUCKROUTE AND DECONTAMINATION PLANSUBMITTAL BY CONTRACTOR.3.EXCLUSION ZONE SHALL HAVE A HIGHVISIBILITY FENCE AROUND PERIMETERWITH TEMPORARY GATE FOR VEHICLEINGRESS/EGRESS.4.CONTRACTOR TO ESTABLISH TRUCKROUTE FOR HAUL TRUCKS THAT WILLENTER THE EXCLUSION ZONE INDECONTAMINATION PLAN.5.CONTRACTOR TO ESTABLISH LOADINGZONE, DRY DECONTAMINATION ZONE,WATER TANKS, AND QUARRY SPALLSINSIDE EXCLUSION ZONE.6.CONTRACTOR TO OBTAIN TRAFFICCONTROL PERMITS AND PREPARE TRAFFICCONTROL PLAN AS NECESSARY. MONSTER ROAD SWDRYDECONTAMINATIONZONE(LOCATIONMAY VARY)APPROXIMATE EXCLUSION ZONEEXCAVATIONBOTTOMAPPROXEXCAVATIONAREASAW CUT AND DEMO EXISTINGCONCRETE AS NEEDED TOCOMPLETE EXCAVATION. SLABIS 4 TO 8.5 INCHES THICK.REFER TO EXCAVATIONSECTION IN X5.0.EXISTINGCB (TYP)EXISTING WATER LINE TO BEDECOMMISSIONED IN ACCORDANCEWITH REQUIREMENTS OUTLINED INTERRA ASSOCIATES GEOTECHNICALREPORT. AFTER CONFIRMING LINE ISEMPTY, CUT AND CAP LINE WHERE ITENTERS EXCAVATION. REMOVEHYDRANTS, SPRINKLERS, VALVES,BURIED WATER LINE WITHINEXCAVATION LIMITS AND SEGREGATEAS DEBRIS.AOC4-MW01AOC4-MW02AOC4-MW03AOC4-PZ1AOC4-PZ2SB40AOC4-SB06AOC4-SB02AOC4-SS3CP-01CP-02CP-03CP-04A,BX5.0LOADING ZONE (LOCATION MAY VARY)1' 0" THICK (MIN) COURSE OF QUARRYSPALLS OVER FILTER FABRIC (DOEBMP C105). TOP OF QUARRY SPALLSSHALL BE FLUSH WITH EXISTINGPAVEMENT AND/OR CONCRETE SLAB,DEPENDING ON LOCATION. LOCATIONOF EXCLUSION ZONE EGRESS POINTAND QUARRY SPALLS TO BEDETERMINED BY CONTRACTORBASED ON HAUL TRUCK ROUTE INDECONTAMINATION PLAN.AOC4-SB03AOC4-SB04AOC4-SB05AOC4-SB09AOC4-SB10AOC4-SB11AOC4-TW01AOC4-SB01WATER TANKS(LOCATION MAY VARY)E:\Project\clients\Floyd and Snider\2018\DCT Monster Road\DCT_0003.dwg BTSBBBBBBMONSTER ROAD SITE SOIL AND GROUNDWATER REMEDIATIONXXXXXXXX4/17/2018OF 5DCT Industrial, Inc.DRAFTTESC AND EXCAVATION PLAN4X4.0NOTES:1. REFER TO BARGHAUSEN NOVEMBER, 2017 SURVEYFOR ADDITIONAL SITE FEATURE DETAILS.2. REFER TO GENERAL NOTES (DRAWING X2.0) ANDREDEVELOPMENT PLANS AND SPECIFICATIONS FORADDITIONAL TESC REQUIREMENTS.3. UTILITIES SHOWN ON PLAN ARE FROM RECORDINFORMATION. UTILITIES WITHIN THE EXCAVATIONAREA SHALL BE FIELD VERIFIED, USING PRIVATELOCATE COMPANY.4. DECOMMISSION AOC4-MW01 IN ACCORDANCE WITHSTATE WATER WELL REGULATIONS PRIOR TOEXCAVATION. PROTECT ALL OTHER MONITORINGWELLS IN THE WORK AREA FROM DAMAGE.5. STOCKPILES FOR TEMPORARILY STORING CLEANOVERBURDEN MATERIAL SHALL BE LOCATED WITHINEXCLUSION ZONE. PLASTIC SHEETING (BMP C123)SHALL BE USED UNDER STOCKPILES AND TO COVERSTOCKPILES. DO NOT PLACE STOCKPILES OVERCATCH BASINS.6. WATER STORAGE TANKS SHALL BE LOCATED WITHINEXCLUSION ZONE. REFER TO SPECIFICATIONS FORWATER RECOVERY DURING EXCAVATION.7. INSTALL CATCH BASIN INLET PROTECTION ON CATCHBASINS WITHIN WORK AREA.8. CONTROL POINTS FOR EXCAVATION PROVIDE THEMINIMUM AREA AT BOTTOM OF EXCAVATION.CONTROL POINTSHORIZONTAL DATUM: NAD 83/91VERTICAL DATUM: NAVD 88REFER TO DRAWINGS R1.0 THROUH R1.2 FOR BASIS OF BEARINGNAMEEASTINGNORTHINGELEVATIONCP-01 1291538.37 176083.79 16.0CP-02 1291594.54 176031.13 21.0CP-03 1291563.63 175996.40 21.0CP-04 1291505.13 176047.91 16.0LEGENDMONITORING WELL LOCATION AND NUMBERSOIL BORING OR SUB-SLAB VAPOR SAMPLELOCATION AND NUMBERAOC4-SS3AOC4-MW02 EXIST CONCRETE SLAB TO BE SAWCUT AND REMOVED AS NEEDED TOCOMPLETE EXCAVATION.THICKNESS RANGE FROM 4 TO 8.5INCHES.EXIST SURFACE(TYP)REMOVE EXISTING WATERLINE AFTER IT ISDECOMMISSIONED(DEPTH ASSUMED)CONTAMINATED MATERIALTO BE DIRECT-LOADED ANDDISPOSED OF OFF-SITE ATAPPROVED LICENSEDSUBTITLE D LANDFILLANTICIPATEDGROUNDWATERDEPTH 7' ORGANIC TOPSOIL AND CLEAN OVERBURDEN THICKNESS 4 FEET GROUNDWATERNATIVE AQUITARD(DENSE SILT)EXCAVATE TOCONTROL POINTELEVATION (16 FTNAVD 88 NW EDGE) EXCAVATE TO CONTROL POINT ELEVATION (21 FT NAVD 88 SE EDGE)1.511.5185'EXIST SURFACE(TYP)ANTICIPATEDGROUNDWATERDEPTH 7'GROUNDWATERBACKFILL IN ACCORDANCE WITHSPECIFICATIONS AND REQUIREMENTSOUTLINED IN TERRA ASSOCIATESGEOTECHNICAL REPORT.MAXIMIZE BACKFILL WITH APPROVEDCLEAN OVERBURDEN.GEOTEXTILE PLACED OVERQUARRY SPALLS, SEE NOTE 31.511.51TYP SLOPE FORALL FOUR SIDESQUARRY SPALLS,SEE NOTES 2 AND 31'-0"TYP EXISTING WELL AOC4-MW01 TO BEDECOMMISSIONED IN ACCORDANCEWITH STATE WATER WELLREGULATIONS PRIOR TO EXCAVATION.DEPTH ASSUMED.INSTALL DEWATERINGSUMP(S) NO DEEPERTHAN 15 FEET BGSEXCAVATION DEPTHS AND LIMITS PER CONTROL POINTS SHEET X4.0E:\Project\clients\Floyd and Snider\2018\DCT Monster Road\DCT_0004.dwg BTSBBBBBBMONSTER ROAD SITE SOIL AND GROUNDWATER REMEDIATIONXXXXXXXX4/17/2018OF 5DCT Industrial, Inc.DRAFT5SECTION - EXCAVATIONNOT TO SCALEAX4.0SECTION - BACKFILLNOT TO SCALEBX4.0NOTES:1. EXCAVATE TO CONTROL POINT ELEVATIONS.2. SIDE SLOPES BASED ON GEOTECHNICAL REPORTINDICATING TYPE C SOILS. CONTRACTOR MAY USESHORING OR STEEPER SIDE SLOPES AT HIS OWNRISK IF IN HIS OPINION THE STABILITY OF THEEXCAVATION IS SUFFICIENT TO PREVENT SLOUGHINGOR CAVE-IN.3. GROUNDWATER IS ANTICIPATED TO BE PRESENT ATAPPROXIMATELY 7 FEET BGS. RECOVERGROUNDWATER FROM EXCAVATION FOR OFFSITEDISPOSAL PER SPECIFICATIONS. FILL EXCAVATIONWITH QUARRY SPALLS TO AN ELEVATION OF 1'-0"ABOVE THE GROUNDWATER TABLE.4. GEOTEXTILE SHALL BE PLACED OVER QUARRYSPALLS BEFORE BACKFILL IS PLACED. OVERLAPSHEETS BY 1'-0" MIN.5. TOPSOIL AND CLEAN OVERBURDEN TO A DEPTH OF 4FEET BGS SHOULD BE REMOVED AND STOCKPILED.REFER TO SPECIFICATIONS AND TERRA ASSOCIATESGEOTECHNICAL REPORT FOR BACKFILL MATERIALAND COMPACTION REQUIREMENTS.SECTIONS AND DETAILSX5.0