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RS_TIR_BOEING PROJECTS_20170522_v2
ENGINEERING PLANNING SURVEYING Technical Information Report Boeing Commercial Airlines Facility Improvements - Gate D-50: Access Reconfiguration Apron D: New Fuel Spill Containment Vault Building 4-42: Sewer Lift Station Replacement Renton, Washington Shoreline Permit Submittal: May 2017 Technical Information Report for Boeing Commercial Airplanes Facility Improvements - Gate D-50: Access Reconfiguration Apron D: New Fuel Spill Containment Vault Building 4-42: Sewer Lift Station Replacement Prepared for: Boeing Commercial Airplanes, Seattle District P.O. Box 3707, M/S: 1W-10 Seattle, Washington 98124 Prepared by: 8420 154th Avenue NE Redmond, WA 98052 Tele: (425) 869-2670 FAX: (425) 869-2679 Shoreline Permit Submittal May 2017 This report has been prepared by the staff of DOWL under the direction of the undersigned professional engineer whose stamp and signature appears hereon. 13726.07 PRELIMINARY Table of Contents 1.0 PROJECT OVERVIEW .................................................................................................................... 4 Figure 1: TIR Worksheet ......................................................................................................................................... 5 Figure 2: Vicinity Map .......................................................................................................................................... 10 Figure 3: Soils Mapping ........................................................................................................................................ 11 2.0 CONDITIONS & REQUIREMENTS SUMMARY ................................................................. 14 3.0 OFF-SITE ANALYSIS .................................................................................................................... 17 Figure 4: Project 1 – Downstream Outfall to Cedar River ..................................................................................... 18 Figure 5: Projects 2 and 3 - Downstream Outfall to Lake Washington .................................................................. 19 Figure 6: Flood Map ............................................................................................................................................. 20 Figure 7: Hazards ................................................................................................................................................. 21 4.0 FLOW CONTROL & WATER QUALITY FACILITY ANALYSIS & DESIGN ................................ 22 4.1 Existing Site Hydrology ............................................................................................................................... 22 4.2 Developed Site Hydrology .......................................................................................................................... 23 4.3 Performance Standards .............................................................................................................................. 25 4.4 Flow Control System ................................................................................................................................... 25 4.5 Water Quality ............................................................................................................................................. 25 Figure 8: Project 1 – Existing Conditions .............................................................................................................. 26 Figure 9: Project 1 – Proposed Conditions ............................................................................................................ 27 Figure 10: Project 2 – Existing Conditions............................................................................................................. 28 Figure 11: Project 2 – Proposed Conditions .......................................................................................................... 29 Figure 12: Project 3 – Existing Conditions............................................................................................................. 30 Figure 13: Project 3 – Proposed Conditions .......................................................................................................... 31 5.0 CONVEYANCE SYSTEM ANALYSIS & DESIGN ......................................................................... 32 6.0 SPECIAL REPORTS & STUDIES .................................................................................................. 33 7.0 OTHER PERMITS ......................................................................................................................... 34 8.0 CWSPPP ANALYSIS AND DESIGN ............................................................................................. 35 ESC Plan Analysis and Design (Part A) .................................................................................................................. 35 Scope of Work ......................................................................................................................................................... 35 Clearing Limits ......................................................................................................................................................... 35 Cover Measures ...................................................................................................................................................... 35 Perimeter Protection .............................................................................................................................................. 35 Traffic Area Stabilization ......................................................................................................................................... 35 Sediment Retention ................................................................................................................................................ 35 Surface Water Collection ........................................................................................................................................ 36 Dewatering Control ................................................................................................................................................. 36 Dust Control ............................................................................................................................................................ 36 Flow Control ............................................................................................................................................................ 36 SWPPP Plan Design (Part B) ................................................................................................................................. 36 9.0 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT .......... 39 9.1 Bond Quantities .......................................................................................................................................... 39 9.2 Flow Control and Water Quality Facility Summary Sheet and Sketch.......................................................... 39 9.3 Declaration of Covenant for Privately Maintained Flow Control and Water Quality Facilities .................... 39 10.0 OPERATIONS & MAINTENANCE MANUAL ............................................................................. 40 11.0 ON-SITE BPMS ............................................................................................................................ 41 Appendix A CSWPPP Plans Appendix B Operations and Maintenance Manual Appendix C City of Renton Sensitive Area Mapping Appendix D Geotechnical Investigation 4 1.0 PROJECT OVERVIEW Under a single Shoreline Permit Application, Boeing is proposing to improve three existing facilities. These facilities are located within Section 7, Township 23 North, Range 5 East W.M. The following are the specific project locations: Project 1 – Gate D-50: Access Reconfiguration This project is located at the Renton Airport located at 857 East Perimeter Road in Renton, Washington; King County Parcel Number is: 0723059007. Project 2 – Apron D: New Fuel Spill Containment Vault This project is located at the Boeing facility Apron D located at 737 Logan Avenue North in Renton, Washington; King County Parcel Number is: 0723059001, at the south end of the property. Project 3 – Building 4-42: Sewer Lift Station Replacement This project is located at the Boeing facility located at 737 Logan Avenue North in Renton, Washington; King County Parcel Number is: 0723059001, at the north end of the property. These projects will use the 2017 Renton Surface Water Design Manual (RSWDM). These project as a whole will be removing or replacing over 2,000 square feet of impervious surface; therefore a full drainage review will be required. Project 1 is located on the west side of the Cedar River. The area directly discharges to the adjacent Cedar River. For this project threshold discharge area (TDA 1), flow control is not required due to discharging to an exempt water body. Less than 5,000 square feet of new plus replaced PGIS and less than ¾ acre of new PGPS is added therefore this project is exempt for water quality. Projects 2 and 3 are located on the east side of the Cedar River within a single threshold discharge area (TDA 2). Storm drainage from both sites combine to an existing interceptor storm drain system which directly discharges to Lake Washington. This outfall is located approximately 5,200 feet downstream of TDA 1. For TDA 2, flow control is also not required due to discharging to an exempt water body. Less than 5,000 square feet of new plus replaced PGIS and less than ¾ acre of new PGPS is added therefore this project is exempt for water quality. The projects consists of urban land per the USDA soil map. Information Provided: Figure 1: TIR Worksheet Figure 2: Vicinity Map Figure 3: Soils Mapping The Boeing Company Mark Clement, 206-617-2944 DOWL 425-869-2670 Facility Improvement Projects 23N 5E 7 770 West Perimeter Road and 737 Logan Avenue North X X X March 2017 March 2017 FIGURE 1 -TIR WORKSHEET Travis Neu West Lake Washington/Lower Cedar River Cedar River Lake Washington X X FIGURE 1 -TIR WORKSHEET Urban Land Flat,<2%None,100%Paved X TDA 1 -Project 1 TDA 2 -Projects 2 and 3 2 N/A -Exemption 3:Replaced Impervious Direct Discharge Exemption FIGURE 1 -TIR WORKSHEET TBD N/A Aircraft parking Fuel,oil containment Project 2 includes installation of fuel containment facility Threshold Discharge Areas containing <5,000 square feet of new or replaced surface FIGURE 1 -TIR WORKSHEET 1 N/A X X X X X X 10,000 Gallon Vault FIGURE 1 -TIR WORKSHEET FIGURE 1 -TIR WORKSHEET Travis Neu 5-22-17 WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE GATE D50 REPLACEMENT BLDG. 04-042 SEWAGE LIFT STATION APRON D - PHASE II UTILITIES FIGURE 2 EXHIBIT - VICINITY MAP.DWG Plot 1 PLAN REF NO PROJECT 1 D-50 GUARD HOUSE PROJECT 3 REPLACE BUILDING 04-042 SEWAGE LIFT STATION PROJECT 2 APRON D - PHASE II PROJECT LOCATION VICINITY MAP PROJECT SITE PROJECT LOCATION & VICINITY MAP Soil Map—King County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/16/2017 Page 1 of 35259300525950052597005259900526010052603005260500526070052609005261100526130052593005259500525970052599005260100526030052605005260700526090052611005261300558600558800559000559200559400559600559800560000 558600 558800 559000 559200 559400 559600 559800 560000 560200 47° 30' 10'' N 122° 13' 21'' W47° 30' 10'' N122° 12' 3'' W47° 28' 59'' N 122° 13' 21'' W47° 28' 59'' N 122° 12' 3'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 500 1000 2000 3000 Feet 0 150 300 600 900 Meters Map Scale: 1:10,600 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. FIGURE 3 -SOIL MAP MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: King County Area, Washington Survey Area Data: Version 12, Sep 8, 2016 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 1, 2011—Oct 6, 2013 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—King County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/16/2017 Page 2 of 3 FIGURE 3 -SOIL MAP Map Unit Legend King County Area, Washington (WA633) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI BeC Beausite gravelly sandy loam, 6 to 15 percent slopes 0.1 0.0% Ur Urban land 296.0 92.7% W Water 17.2 5.4% Totals for Area of Interest 319.2 100.0% Soil Map—King County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/16/2017 Page 3 of 3 FIGURE 3 -SOIL MAP 14 2.0 CONDITIONS & REQUIREMENTS SUMMARY Existing Conditions In general all three project sites are developed, where majority of the ground cover is impervious with concrete or asphalt. Landscaping at the sites is either minimal or non-existent . Utilities such as water, sewer and power are underground. All project sites contain storm drain systems that will not be altered. For Project Site 1, the existing system discharges to a storm sewer (12-in diameter) pipe which goes east under East Perimeter Road and discharges into the Cedar River. No modification to the system is proposed and the existing storm drain system will be kept in service. The Cedar River levee will not be disturbed. For both Project Sites 2 and 3, the existing systems discharge to a storm drain interceptor system which runs north, parallel with the Cedar River eventually discharging to Lake Washington. The interceptor system begins as a 24-inch diameter system which gradually upsizes to a 60-inch diameter pipe. Modifications to the existing drainage system will not impact the flow paths or systems hydraulic or treatment characteristic. The existing system will be modified to allow for the diversion of storm drainage flows should a spill occur into the proposed fuel containment tanks. This is currently accomplished onsite via other methods that will be replaced by the new tanks. Site soils for all three sites are classified as Urban Land Ur. Figure 3 is a soil map from the USDA Web Soil Survey. Full Drainage Review The three projects as a whole has greater than 2,000 square feet of replaced impervious surface, therefore Full Drainage Review is required. All 8 Core Requirements and 6 Special Requirements apply. As part of a single TIR prepared by DOWL, the following drainage review documents the project thresholds based on design that have been done by DOWL (Project Site 2) as well as project information that have been provided by Boeing (Project Sites 1 and 3). Design for project site 1 is being performed by Boeing and project site 3 is being performed by BergerABAM . KCSWDM Core Requirements 1. Discharge at the Natural Location The projects will not modify the existing system and will continue to discharge into their respective storm drain systems which outfalls to the Cedar River and Lake Washington. 2. Off-Site Analysis The project is exempt from an offsite analysis because the minimal existing impervious surface will be replaced with new impervious surface where the rate, volume duration and discharge location will not change per City of Renton Section 1.2.2 Exemption 15 from Core Requirement #2, item 3. There will be no new impervious area added. Impervious surfaces being replaced will be replaced in kind. 3. Flow Control The outfall for Project 1 is located along the Cedar River downstream of the Taylor Creek confluence and meets the City of Renton Section 1.2.3.1 Direct Discharge Exemption from Core Requirement #3. Projects 2 and 3, discharge at a single location into Lake Washington and meets the City of Renton Section 1.2.3.1 Direct Discharge Exemption from Core Requirement #3. 4. Conveyance These projects do not involve new conveyance systems. The projects replace existing impervious areas in kind, where there will also be no modifications to the existing storm drain conveyance and treatment systems. Valves will be installed on Apron D to stop and divert conveyance flows from that apron to the proposed fuel spill containment tanks in the event of a fuel spill however these improvements are designed to maintain the existing conveyance systems performance without increasing or decreasing flows. 5. Erosion & Sediment Control Temporary erosion and sediment control will be provided for the project. Ground disturbance will be relatively minimal and limited to pavement replacement and vault excavation. Dewatering may be a concern on the project. There is potential for contaminated groundwater, if so discharge will be made to the sanitary sewer. TESC is covered under section 8 of this report. 6. Maintenance and Operations Ownership of the existing stormwater system (Boeing Renton) will not change and the current maintenance program will remain in place. The site is staffed 24-hours a day, there is a central monitoring system in place providing for timely notification of problems. 7. Financial Guarantees and Liability The project will comply with financial guarantees as required by the City of Renton. 8. Water Quality The projects are below the 5,000 square foot threshold for both TDA’s, therefore water quality is not needed. During construction, source control measures will be implemented. 9. On-Site BPMS The projects are above the 2,000 square foot threshold for both TDA’s for total replaced impervious surface triggering the evaluation and implementation of On-Site BMPS per Core Requirement #9. The feasibility and application of On-Site BMPS is further evaluated within section 11 of this report. 16 City of Renton Special Requirements 1. Other Adopted Area Specific Requirements The site is not located within an area having specific requirements above and beyond the core requirements. 2. Flood Hazard Delineation The project site is not within the 100-year floodplain. This project is located Zone X Other Flood Areas, 500-year floodplain per the City of Renton (COR) mapping. See Appendix E. 3. Flood Protect Facilities The existing Cedar River levee will not be disturbed or modified. 4. Source Control This project does warrant source controls. Fuel spill control and containment will be provided for those areas that might hold a fueled or previously fueled aircraft. 5. Oil Control For a redevelopment project, where the threshold of new plus replaced pollution generating impervious surfaces of 5,000 square feet is not exceeded, runoff treatment is not required. Both TDA’s are under the 5,000 square feet threshold. 6. Aquifer Protection Area The project is not located in an Aquifer Protection Area Zone per City of Renton Groundwater Protection Areas (printed 11/12/2014) provided in the City of Renton Amendments to the King County Surface Water Design Manual. 17 3.0 OFF-SITE ANALYSIS The project is exempt from Core Requirement #2 Offsite Analysis because the existing impervious surface will be replaced with new impervious surface. Volume, rate duration and discharge location will not change. Survey information was available for each project site, where the existing storm drain systems and outfall have been located. See Figures 4and 5 below. Project 1 is located in TDA 1, which discharges to the Cedar River. Projects 2 and 3 are located in TDA 2, which discharges to Lake Washington located approximately 5,200 linear feet downstream of TDA 1. 8" CITY W A T E R WWWWPP 24.98GATEPAVED PARKINGPAVED PARKING 28.124.7CO28.328.327.827.524.924.8(3)JB,(2)AC,GMCOINDICATORSHYDROCARBONAND FILLER CAPFH GAS METERING STA24"METRO ABAN6"C24"VC-ABAN4"C6"C6"C 24"METROPRD 4"C6"C24"RC24"METRO ABAN PRD 24"VC24"RC24"VC-ABANAIRPORT PROPERTY L INE AIRPORT PROPERTY LINEAIRPORT PROPERTY L INE AIRPORT PROPERTY LINE5-085-02BOSAIR5-09 CEDARRIVERS.S.S.S.S.S.GAS PUMP4"GAS2"GAS WM BOEING LE A S E L I N E 3/4" STL CW W WW4"CW 8"F12"CWWWWWWWWWWWW W W W W W WWWWWWWWWWWWWWWW W W W W W W W W W 12"CWF L O O D W A L L 6"C 6"C6"VT 4"4"4"6"VT 6"VT4" 8"VT4"8"C4"C 6"VT 4"8"C 4"4"8"C 6"12"ID6"PVC8"C6"C 6"C6"VT 4"4"4"6"VT 6"VT4" 8"VT4"8"C4"C 6"VT 4"8"C 4"4"8"C 6"12"ID6"PVC8"CCO CO CO CO CONO. 50 OUTFALL NO. 781 CB-I TOP 31.38 INV W 30.79 INV N 30.78 BOT 30.18 NAVD88 NO. 856 CB-1 TOP 31.49 INV S 30.24 CB-I TOP 28.16 INV NW 26.7 INV SW 27.1 BOT 26.8 NAVD88 NO. 780 CB-I TOP 31.27 INV NE 30.54 INV SW 30.56 BOT 29.97 NAVD88 NO. 779 CB-I TOP 30.53 INV E 29.78 INV S 29.78 BOT 28.6 NAVD88 NO. 778 SDMH-48 TOP 30.75 FL 21.81 NAVD88 BOT 22.81 NAVD88 NO. 777 CB-II-48 TOP 27.66 TRAP SW 25.96 WL 25.96 BOT 23.3 NAVD88 CB-I TOP 23.6 INV E 21.0 INV W 21.1 NAVD88 PP20 0 20 SCALE IN FEET WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE GATE D-50 REPLACEMENT EXHIBITS - D-50 GATE.DWG Plot 1 Legend Flow Direction Existing Storm Drain Conveyance System PLAN REF NO SD OUTFALL D-50 GUARD HOUSE PROJECT AREA PERIMETER ROAD E . DOWNSTREAM OUTFALL TO CEDAR RIVER GATE D-50 NOTE: PROJECT IS DESIGNED BY BOEING FIGURE 4CEDAR R IVER 7X5'RCB8X5 ' R C B 8X5 ' R C B7X5'RCB7X5'RCB7X5'RCB60"RC7X5'RCB60"RC7X5'RCB STA:55+00STA:55+00STA:45+00STA:50+00STA:50+00STA:45+00AIRCRAFT PARKINGAIRCRAFT PARKINGCROSS-WALKSTA:40+00AIRCRAFT PARKINGSTA:35+00STA:30+00STA:25+00STA:25+00STA:30+00STA:20+00STA:15+00STA:15+00STA:20+00STA:10+00STA:10+00PP BOEINGC8/C9PP BOEINGC7/C8PP BOEINGC6/C7WIND SO C K LAKE WASHINGTONLAKE WASHINGTONLAKE WASH I N G T O N COMMERCIAL WATERWAY NO. 2 PAVEDPAVEDPAVED12"OPEN JOINT-PRDPAVED PARKING12"OPEN JOINT12"OPEN JOINTPAVEDPAVEDPAVED12"OPEN JOINT-PRDPAVED PARKINGPAVED PARKINGPAVED PARKINGAIRPORTPROPERTY12"OPEN JOINT12"OPEN JOINT-PRD12"OPEN JOINT12"OPEN JOINTPAVEDPAVEDPAVEDPAVEDPAVED12"OPEN JOINT12"OPEN JOINTPAVEDPAVEDPAVEDPAVEDS. S. S. S. S. S. S.S.S. S. S. S. S. S. S. S. S. S. S.S.S. S.S.S.S.S.S.S.S.S.S. S. S. S. S. S. S.S.S. S. S. S. S. S. S. S. S.S.S. S.S.S. S. S.S.S. S. S.S.S. S. S. S. S. S.S.S. S.RETAINMENT WALLC C CONC CONC CONC CONC CONC CONC CONC CONCCCONC C. C CONC CONCCONC CONC CONC C C CCONC CONC CONC CONCCC C.C.C C ABAN ELECTRICAL LINEABAN ELECTRICAL LINECONCRETE PILE CAP - WALLSHEETPILECONC CONC PAPILIGHTSCONC CONC ABAN ELECTRICAL LINECONC ABAN ELECTRICAL LINEABAN ELECTRICAL LINERAMP8"FM-CIMETRO SUBMARINE MAINS14"FM-CI8"FM-CI14"FM-CI 8"FM-CIABANDONED8"FM-CI8"FM-CI14"FM-CI24"DI24"DI40"CASING PIPE24"DI40"CASING PIPEROCKSROCKS ROCK SLOPEPROTECTIONDOCK4-67 850 BLDG TAXIWAY A24-20 4-41 4-42 4-52 820 BLDG 840 BLDG 800 BLDG RENTON MUNICIPAL AIRPORT 4-46 4-45 4-44 4-21 4-70 4-78 4-77 4-79 CEDAR RIVER S H A N G A R X11 4-755-27D-4 D-6D-5D-8D-7APRON " D "POSITION A-95-4075-435-401 APRON "A"COMPAS S R O S E SOUTH AIRCRAFT BRIDGE5-1065-1055-1045-36POSITION A-6POSITION A-5POSITION A-7APRON ARENTONSTADIUM 5-36RENTON MUNICIPAL AIRPORT 860 BLDG 749B BLDG 800 BLDG 780 BLDG 790 BLDG TAXIWAY A3 RENTON MUNICIPAL AIRPORT TAXIWAY B3 710 BLDG TAXIWAY A4622 BLDG 5-45 TAXIWAY B4RENTON MUN I C I P A L A I R P O R T 660 BUILDING 608 BLDG TWR FAA TAXIWAY A5BLDG 500 TAXIWAY A6TAXIWAY B5RENTON MUN I C I P A L A I R P O R TLANE AVIATIONAPRON "B"POSITION B-5POSITION B-4POSITION B-3TAXIWAY B6 RENTON MUNICI P A L A I R P O R T FUELCONTAINM E N T 100LL SEL F S E R V I C E FUEL TAN K AREA BLDG 540 100LLJET AFUEL TRU C KCONTAIN M E N T AREA TAXIWAY A5 CEDAR RIVER S H A N G A R S 749A BLDG TAXIWAY A1E(2)ELEC2 - 2" C O N D U I T IN CON C R E T E 2-2" CONDUIT IN CONCRETE ABAN ABAN ABAN ABAN ABAN2-#8 480V CABLE 1" CONDUITPOWERSTATIC GROUNDSTATIC GROUNDSTATIC GROUND(3)E (3)E AB A N P O W E R O' HD E L E C T R I C O' HD ELECTRIC O' HD ELECTRIC EV 2-2 " CONDU IT IN C O N C R E T E 2-2" CONDUIT IN CONCRETE 2 - 2" CONDUIT IN CONCRETE 2 - 2" CONDUIT I N C O N C R E T E ABAN ABAN EXTRA CONDUIT AVAILABLEEE~~~~~ (2)2"CONDUITS IN CONCRETE* ~~1 CONDUIT ABAND .PABAND.EV TOP 18.5 HH HH HH TOP 19.1 PSPL VLT HH HH PSPL VLT HH JB HH SG SG SG SG SG SG HH HH HH HH HH SG SG HH SG HH EMH SG SG SG SG SG XFSG HH HH HH HH HH TOP 21.8 SG SG SG SG SG SG SG SG SG EV HHHH HH W W W W W W R R R R R R R R R R R R R R RR R O R O W W WW WW WW WW WW W W W W W W W W WW G G G G GR GR GR GR R R R R E EV TLB TS EV SG SG SG SGSG SG SGSG HH HH RIM 20.4 EMH HH ABAN LT HH HH HH POWER SERVICE HH HH SG SG SG TLB RIM 21.0 EMH SG SG SG SG SG SG EV LB EV HH EV XF EV RIM 21.2 EMH RIM 21.3 EMH SUBSTATION#BEV EVHHEMH HH EV EV HHEV XF HH LT EV LT/ABAN SG SG SG SG SG SG SG SG SG SG PV PV (3) E PV LT ABAN LT HH LT/ABAN HH 2-26 PAIR #19 CONTROL CABLE, 36" DEEPW W W W W W W W WW WW W W W W W W W W WW WW WW W W W W W W W W WW WW W W W W WW W W W W W W W W W W W W W W WW P PPE E E E E LT LT LT PAPI LIGH T S CARD READERS ABAN ABAN ABAN ABAN ABANDONDED W VLTW VLTWWWWWW VLT12"10"F8" CI FIRE MAIN10"FCITY OF RENTONPUMP STATIONWWWWWWWWWWWWWWWWWWWWWWWWWWWBFW WMHSEC 317RIM 24.8NAVD88BFW WMHSEC 316RIM 23.9NAVD88BFW WMHSEC 315RIM 24.7NAVD88BFW WMHSEC 318RIM 24.9NAVD88BFW WMHSEC 308RIM 23.7NAVD88BFW WMHRIM 24.2SEC 319NAVD88WMHRIM 23.5NAVD88WMHRIM 22.6NAVD88BFW FLUSH HYDRANTH322RIM 23.5NAVD88WMHABANRIM 22.5NAVD88WMHRIM 23.2NAVD88BFW WMHSEC 321RIM 24.0NAVD88WBFW FLUSHHYDRANTH320BFW FLUSHHYDRANTH319BFW FLUSHHYDRANTH318BFW FLUSHHYDRANTH317BFW FLUSHHYDRANTH310BFW FLUSHHYDRANTH309BFW FLUSHHYDRANTH308BFW WMHSEC 320BFW WMHSEC 320BBFW WMHSEC 320AWBFW WMHSEC 322RIM 24.0NAVD88BFW FLUSHHYDRANTH320BBFW FLUSHHYDRANTH321BFW FLUSHHYDRANTH324BFW FLUSHHYDRANTH322BFW FLUSHHYDRANTH320ABFW WMHSEC 304RIM 26.7NAVD88BFWH305BFWH306BFWH307BFWSEC 305BFW PIVSEC 350BFW FLUSHHYDRANTH316BFWSEC 314BFWH228BINVERTEDCROSS(CAPPED)WMWMWMWMWMWMTOP 18.7 TEL VLT TEL VLT TMH TEL VLT RIM 21.9 TMH RIM 22.8 TMH RIM 22.5 TMH TMH AT&T VLT VLT TEL VLT TEL HH TEL HH TEL VLT AT&T TEL VLT TEL VLT AT&TUGT FHFHFHFHFHFHFHFHCITY FHGATE GATE BLAST FENCEBLAST FENCEGATEBLAST FENCEBLAST FENCE GATE BLAST FENCE BLAST FENCE GATEPED. GATE GATE V2 GATE P3 XXX GATE V-1 1 X X X GATE PED. GATE GATE PEDGATEGATEGATE GATE V-4 FIRE GAT E Key Pad 12' GatePED GATE XGATEGATE FL 10.10 RIM 31.9 7 FL 5.9± INV E 8.1 ± RIM 20.05 SS LIFT S T A 5P-02 SSMH-II 5P-03 RIM 18.53 FL 13.71 FL 14.26P R D RIM 17.78 MH R01- 4 2 METRO MH R01-4 3 METRO RIM 19.1 9 FL 12.99 FL 12.84 RIM 18.8 0 RIM 18.93 FL 12.03 5P-06 5P-09 (IN LOCK E D B L D G . ) SSMHCO SSMH-II SSMH-II 5P-05 INV E 13. 8 9 FL 13.09 RIM 19.29 FL 13.35 RIM 19.45 MH R01-4 0 METRO MH R01- 4 1 METRO FL 11.55 RIM 21.03 RIM 20.28 FL 11.83 RIM 20.32 FL 12.81 MH R01-6 2 METRO MH R01- 6 1 METRO MH R01- 6 3 METRO RIM 22.7 9 BOT 13.8 9 WL 17.39 INV N 16. 3 9 FL 11.45 TOP 19.89 RIM 22.2 2 LIFT STA 5Q-02 SSMH ABAN. SSMHABAN. MH R01-6 0 METRO SSMH RIM 24.81INV N 17. 8 5INV S 17. 9 1INV W 19. 2 1 SSMH SSMH RIM 19.87 FL 10.37 ABAN SSMH W/PUMP RIM 19.05 FL 11.95 36"CASING24"DIABANDON D E D 144" MH RIM = 19. 2 1 RO1-41.C MH RIM = 21. 4 1 MH RO1- 4 1 . D SIPHON O U T L E T FL 14.97 RIM 18.92 RIM 17.94FL 13.94 5P-08 CO SSMH-II CO SSMH-II 5P-07 INV S 18. 4 ± INV W 18 . 5 0 RIM 21.26 SS LIFT S T A . 5S-02 RIM 21.8 RIM 23.1 RIM 21.9 RIM 22.5 SSMH-NO . 6 5 SS LIFT S T A . SSMH NO. 71 SSMH NO. 19 SSMH NO. 66 SSMH NO. 67 NO. 68 SSMH ST SSMH RIM 20.5 RIM 21.6 I.E. 19.0 SS RIM 20.5 I.E. (EX) 1 6 . 0I.E. (NEW ) 1 6 . 2 SSMH EJECTOR P U M P MACERAT O R A N D 6"C 4"CIFM(R)ABAN6"C4"SS F M4"FM METRO 27"RCP METRO 27"RCPMETRO 27"RCP 6"C 6"C6"ABAN 6"C 6"C 6"C27"RCP27"RCP 27"RCP27"RCP 12"C8"RIVER WATER(ABAN)27"RCP 27"RCP 8" ABAN27"RCP 27"RCP PRD24"SYPHON UNDER RIVER4" FM(R)24"VC-ABAN 4" FM 8"C(R) 24"VC ABAN ABANDONED SAN24"VC-ABAN 27"RCP SAN 24"VC-ABAN SS CONNECTS TO RENTON STADIUM8"C(R) SS 6" SS PIPE6"CI ABAN 6"C6"C6"C6"CI ABAN3"CI-FM8"8"8"8"4"FM8" 8"6"8" 8"8" 8"8" 8" D.I. 3" PVC 3" PVC 3" PVC CEDAR RIVER COMMERCIAL WATERWAY CEDAR RIVER COMMERCIAL WATERWAY CEDAR RIVER COMMERCIAL WATERWAYCEDAR RIVER COMMERCIAL WATERWAY CEDAR RIVER COMMERCIAL WATERWAY CEDAR RIVER COMMERCIAL WATERWAY CEDAR RIVER COMMERCIAL WATERWAYFIREMAINMAINFIREMAINFIREFIREMAINFIREMAINMAINFIREMAINFIREFIREMAINMAINFIREMAINFIREMAINFIREMAINFIREMAINFIRE12" FIRE MAINFIRE MAIN (ABAND)FIRE MAIN (ABAND)8' (125psi)RAINIER AVE N N. 6TH ST.RAINIER AVE N RAINIER AVE N RAINIER AVENUE N PONDPONDPONDPONDPONDPONDPOND3/4"CW (ABAN )2"CW CITY (ABAN)8" CITY12"8"F8"F4"CW8"F2"CWABANABANABANABANABAN12"IRON12"DI12"DI4"CW12"DI8"8"DI8"DIABANDONED12" WATER12" WATER12" WATER12" WATER12"16"4"CW2"CW CITY8"F8"F16" CITY (IN 30" STEEL CASING)10"FANTI-SIPHONLOOP16" CITY16" CITYABANABANABANABANABANABANABANABANABAN ABAN8"IRON8"IRONH20 CAPPED1" PEX1" PEX1" PEX1" PEXABANDONEDDISCONNECTED 12/12/2012ABANDONED 12/12/2012ABANDONED 12/12/2012ABANDONED 12/12/2012ABANDONED 12/12/2012ABANABAN4"CW8"F10"FABANABANABANABANABANABAN10"F ABAND 16"16"TTTTCO CO CO CO CO CO CO SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SSIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN SIGN KEYPAD KEYPAD KEYPAD KEYPAD 36"DIMBX T-4 T-3 T-2 T-1 WASTE OILDIESEL3"PVC TELEM3"PVC TELEM3"PVC TELEM 3"PVC TELEM3"PVC TELEM3"PVC TELEMACUWINGS BLDG 760 BLDG 756 ACUWINGS 1258.PP1259.PP1260.PPRAINIER AVE NRAINIER AVE NRAINIER AVE NRAINIER AVE NCB TYPE 1GE 29.9812" N-S 26.77IE 27.67 (E)NAVD88CB TYPE 1RIM 29.33IE S 27.47CB TYPE 1RIM 28.47IE E 22.64IE W 22.56NAVD88CB-ITOP 25.2INV E 23.2INV W 23.2BOT 23.2NAVD88CB TYPE 1GE 30.0912" DIW 26.9412" DI S 26.9912" CONC E 26.98NAVD88CB TYPE 1RIM 28.33IE E 23.60IE W 23.66NAVD88CB TYPE 1RIM 26.4612" CONC N 23.99IE 25.57? (E)NAVD88CB-ITOP 23.06INV S 21.5INV W 21.5INV E 21.4INV 4"T E/W 21.5BOT 21.0NAVD88CB TYPE 1RIM 25.50IE W 23.64IE S 23.70IE N 23.61NAVD88CB TYPE 2-48"RIM 29.98IE E 25.28IE W 25.28NAVD88CB TYPE 1GE 27.8412" CONC S,E,W 24.51NAVD88CB TYPE 1RIM 26.44IE NW 24.34EDGE DRAINIE 24.41NAVD88CB TYPE 2-48"RIM 29.52IE NW 23.57IE SE 23.60NAVD88SDMH-48RIM 27.7912" DI N/S/W 23.97NAVD88CB TYPE 1RIM 26.69IE E 24.09EDGE DRAINIE S 24.09NAVD88CB TYPE 2-48"RIM 28.41IE NW 24.44IE SE 24.46NAVD88CB TYPE 1GE 27.8612" CONC E 23.6312" CONC W 23.63NAVD88CB TYPE 1RIM 27.03IE E 23.71IE W 23.69NAVD88CB TYPE 1RIM 22.72IE W 20.68NAVD88OWSRIM WMH 22.46RIM EMH 22.52INV 2" 20.52INV OUT 20.42INV IN 19.97WL 19.92BOT 18.92NAVD88CB TYPE 1GE=24.69 ESTIE=21.89 (E&W)NAVD88CB, TYPE 1GE 23.624" CONC SW 20.8812" CONC N 20.6012" CONC E 20.64NAVD88CB TYPE 1RIM 25.99IE S 22.89IE N 22.89NAVD88CB, TYPE 1GE 25.5312" CONC N 24.05NAVD88CB TYPE 1GE 26.388" CONC W 24.16NAVD88CB, TYPE 1RIM 25.50IE E 23.59 (12"CONC)IE W 23.59 (12"CONC)NAVD88CB TYPE 1RIM 25.58IE W 24.02NAVD88CB TYPE 1GE 26.4512" CONCN.W.&E 22.85NAVD88CB TYPE 1RIM 27.03IE W 22.69NAVD88SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN SLOT DRAIN~~ ~ ~ ~ 6"CPP6"HDPE6"HDPE ~6"HDPE6" H D P E 6"HDPE6"HDPE6"HDPE6"HDPE6"HDPE6"HDPE6"HDPEW DM TD TD TD TD TD TDTD TDTD TD TD TD TD TD TD TD TD TD TD TD TD TD TD TD TDTDTD TD TD TD UTIL. VAULT ASPHALT TRAIL DITCH PARK ACCESSROAD DITCH DITCH PARK ACCESSROAD PARK ACCESSROAD DITCH RIVERSIDE DRIVE DITCH PARK ACCESSROAD DITCHNPROJECT NORTH TRUE NO R T H 6"STSSTSABANDONDED STS6"ADS6"ADS 24"C21"RC18"C12"HDPE6"C15"RC15"RC6"CI12"C6"C I GATEGATEGATEGATEGATEGATEGATEGATE AAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWBB B BBB BB BBBBBBBBBB BBBB BBBBBB B B BBBB BB B BBBBBBB BBBBBBBB BBBBBBBB BBBBBBBBBBBBBBB B SHED STORAGECONTAINERCONTAINERCONTAINER CONTAINERCONTAINERCONTAINERCONTAINERCOCO CO CO6"PVC6"PVC6"PVC6"PVC6"CONC8"CONC8"CONC8"CONC4"DI8"CONC8"CONC8"CONC8"CONC8"CONC 24"SS 6"P VC6"PVCPAINTED TOW PATHPAINTED TOW PATH5-1305-1015-100FIRE STATION5-1035-1025-1255-1115-1225-1125-1255-28 BUILDING5-4035-1105-1245-295-30GATE D455-27SSMHRIM 22.91IE N 16.76IE S 16.81CHANNELED BOTTOMSSMHRIM 24.52GENERATOR TRAILERON MANHOLE TOP(4-22-15)SSMH (48"DIA)RIM 24.72IE N 17.77IE W 19.12IE S 17.77CHANNELED BOTTOMNo. 2A-3SSMH (48"DIA)RIM 26.29CTR. CHANNEL EL 22.19No. 2A-2SSMH (48"DIA)RIM 26.69IE E 20.59IE W 20.49CHANNELED BOTTOMNo. 2A-1SSMH (48"DIA)RIM 24.95IE E 18.75IE N 18.50IE S 18.55CHANNELED BOTTOMSSMH (48"DIA)RIM 25.30IE N 18.25IE S 18.30CHANNELED BOTTOMSSMH (54"DIA)RIM 21.96IE E 14.16IE S 14.06CHANNELED BOTTOMSSMH (54"DIA)RIM 22.07IE N 11.97IE W 12.07CHANNELED BOTTOMNo. 2A-4SSMH (48"DIA)RIM 27.3CTR. CHANNEL EL 24.14CONC CURBCONC CURBCONC CURBRAMPRAMPRAMPRAMPRAMPRAMPRAMPCONCRETE RAMPRAMPRAMPRAMP8' CL & B W F E N C EOWSOWSTMH-31C5.2 X 3.3RIM 27.20BOT 20.40TMH-31D3.3 X 5.2RIM 26.56BOT 19.86TMH-31E3.3 X 5.3RIM 25.63BOT 19.13TMH-285.3 x 3.3RIM 23.90BOT 17.00TMH-295.3 X 3.3RIM 24.02BOT 17.42TMH-304.3 x 8.2RIM 23.40BOT 15.55TMH-318.4 X 4.3RIM 24.98BOT 17.35TMH-31A5.2 X 3.4RIM 26.10BOT 19.30TMH-31B5.3 X 3.3RIM 26.05BOT 19.104"A1"A1"A1"A4"A1"A4"A(ABAN.)1"A1"A4"A1"A 1"A - NOT PAINTED1"A - NOT PAINTED4"A1"A1 1/2"A1 1/2"A1 1/2"A(ABAN.)1"A1"A1 1/2"A1"A1" A1"A1'A1"A1"A1"A4"A1" A6" M 2" DEC 2" DEC 2" DEC2" DEC 2" DEC 2" DEC 2" DEC 8" M8" M 8" M6" M8" M10" M 6" M8" M6" M8" M10" M8" M 6" M4-8" M8-8" M12" P2-10" PUNKNOWN UTILITY PAINTTOP 2X60HZELEV=21.48 TOP 2X400HZELEV=22.03 TOP 2X60HZELEV=21.28 TOP 2X400HZELEV=21.42 TOP 2X400HZELEV=20.89 TOP 2X400HZELEV=20.89 TOP 400HZELEV=23.5 TOP FWELEV=21.93 TOP FWELEV=22.38 TOP FWELEV=22.40 TOP FWELEV=22.50 TOP FW @STUBELEV=22.77 EDGE OFASPH SAWCUT SAWCUT SAWCUT SAWCUT W MH RIM 25.44 TOP 4"=23.44SUMP=21.22 W MH RIM 25.00 W MH RIM 25.61 TOP 4"=23.66SUMP=21.51 W MH RIM 25.38TOP W=23.43TOP 1"AIR=23.33TOP POWER=23.64SUMP=21.63 W MH RIM 25.15TOP W=23.15 TOP 1"AIR=23.10SUMP=21.41 W VLT RIM 25.1TOP W=22.25TOP W=22.06TOP N=23.40SUMP=20.91 W VLT RIM 24.9 TOP E/W=22.4TOP N=22.4SUMP=21.00 SOLID LID CBRIM 25.15IE S 12"DI=20.95IE N 12"DI=21.00IE N 2"DI=22.18SUMP=20.07 SOLID LID CBRIM 24.29 IE S 12"DI=22.18 IE E 6"DI=22.53SUMP=20.66 STORM PUMP STARIM 24.87 TOP EW 8"=21.97TOP NS=19.33SUMP=17.87 WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE APRON D - PHASE II UTILITIES BUILDING 04-042 - REPLACE SEWAGE LIFT STATION EXHIBIT - OUTFALL TO LAKE WA.DWG Plot 1 Legend Flow Direction Existing Storm Drain Conveyance SystemSD 150 0 150 SCALE IN FEET PLAN REF NO APRON D PROJECT AREA BLDG 04-042 LIFT STATION PROJECT AREA OUTFALL DOWNSTREAM OUTFALL TO LAKE WASHINGTON FIGURE 5 CEDAR RIVER RUNWAY 1 6 / 3 4 BOEING RENTONAPRON D LAKE WASHINGTON REPLACE BLDG 04-042 SEWAGE LIFT STATION NOTE: PROJECT IS DESIGNED BY BOEING 42" 36" 30"24" 54" 24"60" 18,056 1,505 City of Renton Flood Map This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. None 3/13/2017 Legend 1,0230512 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 1,023 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov Floodway Special Flood Hazard Areas (100 year flood) Other Flood Areas (Zone X - 500 year flood) Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions FIGURE 6 -FLOOD MAP 18,056 1,505 City of Renton Hazards This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. None 3/13/2017 Legend 1,0230512 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 1,023 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov Landslide VERY HIGH HIGH MODERATE UNCLASSIFED Faults Seismic Hazard Areas Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions 22 4.0 FLOW CONTROL & WATER QUALITY FACILITY ANALYSIS & DESIGN 4.1 Existing Site Hydrology In general the three project sites are impervious where the pavement grade is relatively flat with slopes between 0.5% and 1.0%. Runoff is collected by a network of catch basins that will not be modified. TDA-1 (Project 1) Project 1 – Gate D-50: Access Reconfiguration The existing pavement surface consist of patches of asphalt. The 12-inch diameter storm drain system collects runoff from this parking area and runs north easterly to a catch basin across East Perimeter Road, discharging to the Cedar River. Drainage patterns will remain the same and the discharge point will remain the same. TDA-2 (Projects 2 and 3) Project 2 – Apron D: New Fuel Spill Containment Vault The existing pavement surface consist of concrete panels. Within the area of work, Apron D is collected by a storm drain system located along the west limits of the site. This 24-inch diameter storm drain system discharges to a 24-inch diameter storm drain interceptor system, which conveys stormwater northerly parallel with the Cedar River and then outfalls northeasterly into Lake Washington. Drainage patterns within the site will remain the same and the discharge point will remain the same. Project 3 – Building 4-42: Sewer Lift Station Replacement The existing pavement surface consist of asphalt. Similar to Project 2, the site contains a 24-inch storm drain system. The 24-inch system is parallel with the adjacent interceptor system, but eventually ties into the interceptor system which then outfalls into Lake Washington. The 24-inch pipe discharges to a Type 2 – 96” diameter manhole which connects to the 60-inch diameter pipe discharging to Lake Washington. Drainage patterns will remain the same and the discharge point will remain the same. 23 4.2 Developed Site Hydrology TDA-1 (Project 1) Project 1 – Gate D-50: Access Reconfiguration This project will involve revising the gate entrance at Gate D-50 near Apron A. Work will involve replacing 3,300 square feet of existing asphalt area and reconfiguring perimeter fencing, new double swing gate entrance, shifting jersey barrier locations, revising pavement markings for both vehicles and pedestrians and relocation of associated utility work. The existing storm drain system for the site will not be revised. Figures 8 and 9 provide the limits of work and location of pavement replacement. Figure 8: Existing Conditions Figure 9: Proposed Conditions Table 1: Project 1 - Area Summary New Impervious Surface 0.00 Acres Replaced Impervious Surface 0.08 Acres TDA-2 (Projects 2 and 3) Project 2 – Apron D: New Fuel Spill Containment Vault This project will involve installing a 10,000 gallon spill containment vault within Apron D. Approximately 1,650 square feet of pavement will be replaced for this portion of the work. This unit will tie into the existing Boeing diversion system which currently includes an emergency spill push button where spill containment involves flooding the apron surface. The manual activation push button will divert the flow from the storm sewer mains serving the stalls to the underground spill containment vault. The main line valves are normally open, the diversion valves normally closed. The containment volume is 10,000 gallons, as required by Boeing criteria. Recognizing that mixing stormwater and spilled fuel is problematic because the containment volume cannot be sized for whatever storm event that might be occurring, the activation of the diversion will remain manual via a panic button. In the event of a spill, the crew can activate the diversion and send the spill to the vault. There will be a fluid level sensor in the containment vault to track potential groundwater intrusion in to the vault. There are actually two vaults, both Utility Vault precast units each holding 5,000 gallons each. The containment vaults will be ballasted with a concrete collar to prevent flotation from high groundwater. Figures 10and 11 provide the limits of work and location of pavement replacement. Figure 10: Existing Conditions Figure 11: Proposed Conditions Table 2: Project 2 - Area Summary New Impervious Surface 0.00 Acres Replaced Impervious Surface 0.04 Acres 24 Project 3 – Building 4-42: Sewer Lift Station Replacement The scope of work for this project involves the replacement of a sewage lift station at Building 4-42. This lift station serves Building 4-42, 4-41 and west side of Building 4-20. This includes installation of a new vault for collection of sewage, two new submersible sewage pumps, controls and piping. Sewer lines from Building 4-42 and 4-41 will be rerouted to the new sewage lift station vault. The 4” discharge line from the new sewage pumps will be connected to the existing 4” sewage discharge line just south of the new lift station. The old sewage lift station will be demolished and filled in after the new lift station is put into service. The project will involve approximately 1,600 square feet of replaced impervious surface. Figures 12 and 13 provide the limits of work and location of pavement replacement. Figure 12: Existing Conditions Figure 13: Proposed Conditions Table 3: Project 3 - Area Summary New Impervious Surface 0.00 Acres Replaced Impervious Surface 0.04 Acres Overall, for TDA 2, the two projects will replace a total of 3,250 square feet of impervious surface. This is below the 5,000 square feet threshold for water quality. 25 4.3 Performance Standards Flow Control The project qualifies for the Direct Discharge Exemption per Section 1.2.3.1, Table 1.2.3.B. The projects will not add any new impervious surfaces. The projects directly discharge to the Cedar River and Lake Washington. There will be no modifications to the existing storm drain system. Conveyance The projects do not modify the existing storm drain systems, or add additional impervious surfaces. Since there will be no change in flow characteristics per City of Renton Section 1.2.4.2, the existing onsite conveyance systems do not need to be analyzed for conveyance capacity. Water Quality Per City of Renton Section 1.2.8 Exemption 1 – Surface Area Exemption, a proposed project or any threshold discharge area within the site of a project is exempt if it meets all of the following criteria: a) Less than 5,000 square feet of new plus replaced PGIS that is not fully dispersed will be created, AND b) Less than ¾ acre of new PGPS that is not fully dispersed will be added 4.4 Flow Control System The project site has a direct discharge exemption because it is located near Lake Washington, on the Cedar River. No flow control is proposed. 4.5 Water Quality Per section 4.2 above, the projects within their respective TDA’s are exempt based on surface areas being less than 5,000 square feet. WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE GATE D-50 REPLACEMENT EXHIBITS - D-50 GATE.DWG Plot 1PERIMETER ROAD E . EXISTING CONDITIONS GATE D-50 NOTE: PROJECT IS DESIGNED BY BOEING FIGURE 8 PLAN REF NO D-50 GUARD HOUSE PROJECT AREA WWW.DOWL.COM 50 0 50 SCALE IN FEET FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE GATE D-50 REPLACEMENT EXHIBITS - D-50 GATE.DWG Plot 1PERIMETER ROAD E . PROPOSED CONDITIONS GATE D-50 NOTE: PROJECT IS DESIGNED BY BOEING FIGURE 9 PLAN REF NO REPLACED IMPERVIOUS 3,300 SF D-50 GUARD HOUSE PROJECT AREA ABANDONEDHARDSTANDPSD3DS-1DS-2DS-3DS-4PSD10PSD9DS-7DS-8DS-9PSD7DS-10GBGBPSD6EPGBPSD5DS-11EPPSD4EPJUNCTION BOXABOVE GROUNDPSD8GB2PSD2PPEP PSD1EP20' SANITARY SEWER EASEMENT REC. No. 20030701111459DS-6GBGBGBGBDS-12GBEPEPDS-5ABANDONDEDAIR/TELE/WATERABANDONDED ELECTRIC400HZ MH400HZ MHELECTRIC NOT PAINTEDMCM 400HZELECTRIC NOT PAINTED(6) CONDUITS)GB1ENDTRACENO PAINT TO (8) CONDUITSNO PAINT TO (8) CONDUITSEPEP400HZ MHUGP(PRD)UGP(PRD)GNDGND(PRD)GND(PRD)GND(PRD)GND(PRD)ACUGP(PRD GRD(PRD)UGP(PRD)ACACACP PELECTRICAL OUTLETABOVE GROUND6"STSSTSABANDONDED STS6"ADS6"ADS 24"C21"RC18"C6"C15"RC6"CI6"C I GATEGATEGATEGATEGATEGATEGATEGATE AAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWBB B B B B BB BBBBBBBBBB BBBB BBB B BB B B BBBB BB B BB BBBBB B B B BB BB B BB BBBB BB BBBBBBBBBBBBB B B B GR GRGR GR GR GR GR GR GR GR GR GR GR GRGRGRGRGRGRGRGR GR GR GRGR GRGR GR GRGR GRGRGRGRGR TTELE NOT PAINTEDTELE NOT PAINTEDTELE NOT PAINTEDTELE NOT PAINTEDTELE VAULTENDTRACE2.7DSHED STORAGECONTAINERCONTAINERCONTAINER CONTAINERCONTAINERCONTAINERCONTAINER6"PVC6"PVC6"PVC6"PVC6"CONC8"CONC8"CONC8"CONC4"DI8"CONC8"CONC8"CONC8"CONC8"CONC 24"SS 6"PVC6"PVCPAINTED TOW PATHPAINTED TOW PATH5-1305-1015-100FIRE STATION5-1035-1025-1255-1115-1225-1125-1255-28 BUILDING5-4035-1105-1245-295-30GATE D455-27SSMHRIM 22.91IE N 16.76IE S 16.81CHANNELED BOTTOMSSMHRIM 24.52GENERATOR TRAILERON MANHOLE TOP(4-22-15)SSMH (48"DIA)RIM 24.72IE N 17.77IE W 19.12IE S 17.77CHANNELED BOTTOMNo. 2A-3SSMH (48"DIA)RIM 26.29CTR. CHANNEL EL 22.19No. 2A-2SSMH (48"DIA)RIM 26.69IE E 20.59IE W 20.49CHANNELED BOTTOMNo. 2A-1SSMH (48"DIA)RIM 24.95IE E 18.75IE N 18.50IE S 18.55CHANNELED BOTTOMSSMH (48"DIA)RIM 25.30IE N 18.25IE S 18.30CHANNELED BOTTOMSSMH (54"DIA)RIM 21.96IE E 14.16IE S 14.06CHANNELED BOTTOMSSMH (54"DIA)RIM 22.07IE N 11.97IE W 12.07CHANNELED BOTTOMNo. 2A-4SSMH (48"DIA)RIM 27.3CTR. CHANNEL EL 24.14CONC CURBCONC CURBCONC CURBRAMPRAMPRAMPRAMPRAMPRAMPRAMPCONCRETE RAMPRAMPRAMPRAMPCO CO CO CO 8' CL & B W F E N C EOWSOWSTMH-31C5.2 X 3.3RIM 27.20BOT 20.40TMH-31D3.3 X 5.2RIM 26.56BOT 19.86TMH-31E3.3 X 5.3RIM 25.63BOT 19.13TMH-285.3 x 3.3RIM 23.90BOT 17.00TMH-295.3 X 3.3RIM 24.02BOT 17.42TMH-304.3 x 8.2RIM 23.40BOT 15.55TMH-318.4 X 4.3RIM 24.98BOT 17.35TMH-31A5.2 X 3.4RIM 26.10BOT 19.30TMH-31B5.3 X 3.3RIM 26.05BOT 19.104"A1"A1"A1"A4"A1"A4"A(ABAN.)1"A1"A4"A1"A 1"A - NOT PAINTED1"A - NOT PAINTED4"A1"A1 1/2"A1 1/2"A1 1/2"A(ABAN.)1"A1"A1 1/2"A1"A1" A1"A1'A1"A1 "A1"A4"A1" A6" M 2" DEC 2" DEC2" DEC2" DEC 2" DEC 2" DEC 2" DEC 8" M8" M 8" M 6" M 8" M 10" M 6" M8" M6" M8" M10" M8" M 6" M8-8" M12" P2-10" P23.33UNKNOWN UTILITY PAINTTOP 2X60HZ ELEV=21.48 TOP 2X400HZ ELEV=22.03 TOP 2X60HZ ELEV=21.28 TOP 2X400HZ ELEV=21.42 TOP 2X400HZ ELEV=20.89 TOP 2X400HZ ELEV=20.89 TOP 400HZ ELEV=23.5 TOP FW ELEV=21.93 TOP FW ELEV=22.38 TOP FW ELEV=22.40 TOP FW ELEV=22.50 TOP FW @STUB ELEV=22.77 EDGE OF ASPH SAWCUT SAWCUT SAWCUT SAWCUT W MH RIM 25.44 TOP 4"=23.44 SUMP=21.22 W MH RIM 25.00 W MH RIM 25.61 TOP 4"=23.66 SUMP=21.51 W MH RIM 25.38 TOP W=23.43 TOP 1"AIR=23.33 TOP POWER=23.64 SUMP=21.63 W MH RIM 25.15 TOP W=23.15 TOP 1"AIR=23.10 SUMP=21.41 W VLT RIM 25.1 TOP W=22.25 TOP W=22.06 TOP N=23.40 SUMP=20.91 W VLT RIM 24.9 TOP E/W=22.4 TOP N=22.4 SUMP=21.00 SOLID LID CB RIM 25.15 IE S 12"DI=20.95 IE N 12"DI=21.00 IE N 2"DI=22.18 SUMP=20.07 SOLID LID CB RIM 24.29 IE S 12"DI=22.18 IE E 6"DI=22.53 SUMP=20.66 STORM PUMP STA RIM 24.87 TOP EW 8"=21.97 TOP NS=19.33 SUMP=17.87 WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE APRON D - PHASE II EXHIBIT - APRON D PHASE II.DWG Plot 1 PLAN REF NO PROJECT AREA EXISTING CONDITIONS FIGURE 10 ABANDONEDHARDSTANDPSD3DS-1DS-2DS-3DS-4PSD10PSD9DS-7DS-8DS-9PSD7DS-10GBGBPSD6EPGBPSD5DS-11EPPSD4EPJUNCTION BOXABOVE GROUNDPSD8GB2PSD2PPEP PSD1EP20' SANITARY SEWER EASEMENT REC. No. 20030701111459DS-6GBGBGBGBDS-12GBEPEPDS-5ABANDONDEDAIR/TELE/WATERABANDONDED ELECTRIC400HZ MH400HZ MHELECTRIC NOT PAINTEDMCM 400HZELECTRIC NOT PAINTED(6) CONDUITS)GB1ENDTRACENO PAINT TO (8) CONDUITSNO PAINT TO (8) CONDUITSEPEP400HZ MHUGP(PRD)UGP(PRD)GNDGND(PRD)GND(PRD)GND(PRD)GND(PRD)ACUGP(PRD GRD(PRD)UGP(PRD)ACACACP PELECTRICAL OUTLETABOVE GROUND6"STSSTSABANDONDED STS6"ADS6"ADS 24"C21"RC18"C6"C15"RC6"CI6"C I GATEGATEGATEGATEGATEGATEGATEGATE AAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWBB B B B B BB BBBBBBBBBB BBBB BBB B BB B B BBBB BB B BB BBBBB B B B BB BB B BB BBBB BB BBBBBBBBBBBBB B B B GR GRGR GR GR GR GR GR GR GR GR GR GR GRGRGRGRGRGRGRGR GR GR GRGR GRGR GR GRGR GRGRGRGRGR TTELE NOT PAINTEDTELE NOT PAINTEDTELE NOT PAINTEDTELE NOT PAINTEDTELE VAULTENDTRACE2.7DSHED STORAGECONTAINERCONTAINERCONTAINER CONTAINERCONTAINERCONTAINERCONTAINER6"PVC6"PVC6"PVC6"PVC6"CONC8"CONC8"CONC8"CONC4"DI8"CONC8"CONC8"CONC8"CONC8"CONC 24"SS 6"PVC6"PVCPAINTED TOW PATHPAINTED TOW PATH5-1305-1015-100FIRE STATION5-1035-1025-1255-1115-1225-1125-1255-28 BUILDING5-4035-1105-1245-295-30GATE D455-27SSMHRIM 22.91IE N 16.76IE S 16.81CHANNELED BOTTOMSSMHRIM 24.52GENERATOR TRAILERON MANHOLE TOP(4-22-15)SSMH (48"DIA)RIM 24.72IE N 17.77IE W 19.12IE S 17.77CHANNELED BOTTOMNo. 2A-3SSMH (48"DIA)RIM 26.29CTR. CHANNEL EL 22.19No. 2A-2SSMH (48"DIA)RIM 26.69IE E 20.59IE W 20.49CHANNELED BOTTOMNo. 2A-1SSMH (48"DIA)RIM 24.95IE E 18.75IE N 18.50IE S 18.55CHANNELED BOTTOMSSMH (48"DIA)RIM 25.30IE N 18.25IE S 18.30CHANNELED BOTTOMSSMH (54"DIA)RIM 21.96IE E 14.16IE S 14.06CHANNELED BOTTOMSSMH (54"DIA)RIM 22.07IE N 11.97IE W 12.07CHANNELED BOTTOMNo. 2A-4SSMH (48"DIA)RIM 27.3CTR. CHANNEL EL 24.14CONC CURBCONC CURBCONC CURBRAMPRAMPRAMPRAMPRAMPRAMPRAMPCONCRETE RAMPRAMPRAMPRAMPCO CO CO CO 8' CL & B W F E N C EOWSOWSTMH-31C5.2 X 3.3RIM 27.20BOT 20.40TMH-31D3.3 X 5.2RIM 26.56BOT 19.86TMH-31E3.3 X 5.3RIM 25.63BOT 19.13TMH-285.3 x 3.3RIM 23.90BOT 17.00TMH-295.3 X 3.3RIM 24.02BOT 17.42TMH-304.3 x 8.2RIM 23.40BOT 15.55TMH-318.4 X 4.3RIM 24.98BOT 17.35TMH-31A5.2 X 3.4RIM 26.10BOT 19.30TMH-31B5.3 X 3.3RIM 26.05BOT 19.104"A1"A1"A1"A4"A1"A4"A(ABAN.)1"A1"A4"A1"A 1"A - NOT PAINTED1"A - NOT PAINTED4"A1"A1 1/2"A1 1/2"A1 1/2"A(ABAN.)1"A1"A1 1/2"A1"A1" A1"A1'A1"A1 "A1"A4"A1" A6" M 2" DEC 2" DEC2" DEC2" DEC 2" DEC 2" DEC 2" DEC 8" M8" M 8" M 6" M 8" M 10" M 6" M8" M6" M8" M10" M8" M 6" M8-8" M12" P2-10" P23.33UNKNOWN UTILITY PAINTTOP 2X60HZ ELEV=21.48 TOP 2X400HZ ELEV=22.03 TOP 2X60HZ ELEV=21.28 TOP 2X400HZ ELEV=21.42 TOP 2X400HZ ELEV=20.89 TOP 2X400HZ ELEV=20.89 TOP 400HZ ELEV=23.5 TOP FW ELEV=21.93 TOP FW ELEV=22.38 TOP FW ELEV=22.40 TOP FW ELEV=22.50 TOP FW @STUB ELEV=22.77 EDGE OF ASPH SAWCUT SAWCUT SAWCUT SAWCUT W MH RIM 25.44 TOP 4"=23.44 SUMP=21.22 W MH RIM 25.00 W MH RIM 25.61 TOP 4"=23.66 SUMP=21.51 W MH RIM 25.38 TOP W=23.43 TOP 1"AIR=23.33 TOP POWER=23.64 SUMP=21.63 W MH RIM 25.15 TOP W=23.15 TOP 1"AIR=23.10 SUMP=21.41 W VLT RIM 25.1 TOP W=22.25 TOP W=22.06 TOP N=23.40 SUMP=20.91 W VLT RIM 24.9 TOP E/W=22.4 TOP N=22.4 SUMP=21.00 SOLID LID CB RIM 25.15 IE S 12"DI=20.95 IE N 12"DI=21.00 IE N 2"DI=22.18 SUMP=20.07 SOLID LID CB RIM 24.29 IE S 12"DI=22.18 IE E 6"DI=22.53 SUMP=20.66 STORM PUMP STA RIM 24.87 TOP EW 8"=21.97 TOP NS=19.33 SUMP=17.87 WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE APRON D - PHASE II EXHIBIT - APRON D PHASE II.DWG Plot 1 PLAN REF NO PROJECT AREA REPLACED IMPERVIOUS FOR FUEL CONTAINMENT 1,650 SF PROPOSED CONDITIONS FIGURE 11 WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE BUILDING 04-042 REPLACE SEWAGE LIFT STATION EXHIBITS - 04-042 LIFT STATION.DWG Plot 1 BUILDING 04-042 EXISTING CONDITIONS FIGURE 12 REPLACE BLDG. 04-042 SEWAGE LIFT STATION NOTE: PROJECT IS DESIGNED BY BOEING PLAN REF NO PROJECT AREA WWW.DOWL.COM FILE NAME TIME DATE DESIGNED BY ENTERED BY CHECKED BY PROJ. ENGR. REGIONAL ADM.REVISION DATE BY SHEET OF SHEETS P.E. STAMP BOX DATE LOCATION NO.CONTRACT NO. JOB NUMBER REGION NO. STATE FED.AID PROJ.NO. WASHPLOTTED BY W. HOLDEN N. WONG W. HOLDEN T. NEU W. HOLDEN BOEING - RENTON SITE BUILDING 04-042 REPLACE SEWAGE LIFT STATION EXHIBITS - 04-042 LIFT STATION.DWG Plot 1 PROPOSED CONDITIONS FIGURE 13 REPLACE BLDG. 04-042 SEWAGE LIFT STATION NOTE: PROJECT IS DESIGNED BY BOEING BUILDING 04-042 PLAN REF NO PROJECT AREA REPLACED IMPERVIOUS 1,600 SF 32 5.0 CONVEYANCE SYSTEM ANALYSIS & DESIGN N/A 33 6.0 SPECIAL REPORTS & STUDIES A Stormwater Pollution Prevention Plan (SWPPP) will be prepared under a separate cover. The project geotechnical report is being prepared by Soil and Environmental Engineers, Inc. and the final report is not available for inclusion in the TIR at this time. The report will be submitted for the under a separate cover. 34 7.0 OTHER PERMITS This TIR was prepared for the Shoreline Permit application. 35 8.0 CWSPPP ANALYSIS AND DESIGN ESC Plan Analysis and Design (Part A) Scope of Work Earthwork for the projects will be limited to excavation necessary for pavement replacement and vault installation. The existing site is paved, the existing concrete and asphalt will remain in place as long as possible. The project will use commercial filtration tanks during construction for stormwater runoff and dewatering. Clearing Limits The clearing limits will be spray painted with white paint on the edge of the existing concrete panels to be removed. Cover Measures The existing asphalt and concrete will remain in place as long as possible. Any exposed disturbed soil will need to be stabilized at the end of each shift, plastic sheeting is the most practical means of accomplishing this. Perimeter Protection The perimeter will have a temporary safety fence. In the perimeter areas on the downhill side a triangular sediment filter dike is to be installed. This triangular sediment filter dike works similar to a silt fence but can easily be installed on existing pavement. The filter fabric traps the sediment so that it can be removed after reaching a depth of four inches. Traffic Area Stabilization Currently this access is paved, and will be used as existing pavement as long as possible. Once the asphalt is removed, a construction entrance will be installed. If the construction entrance is not providing enough protection then a wheel wash will be installed. Sediment Retention Given the nature of the site and the high groundwater present, conventional sediment traps or ponds would be problematic. Commercial settling tanks and chitosan enhanced filtration units will be employed needed for projects 2 and 3. Runoff will be collected and pumped from sumps and dewatering flow will be pumped directly into the treatment system. Site soil disturbance on project 1 will be limited and it is not anticipated that the site will generate significant quantities of sediment laden runoff. Project 1 will utilize catch basin socks and localized TESC measures to prevent sediment laden water leaving the site. 36 Surface Water Collection The downstream collection system is in place. The construction area will discharge into the existing system after going through the filtration tanks for project 2 & 3. Surface water collection is not anticipated for project 1. Dewatering Control The commercial tank and filtration system will also be used for dewatering the site. There is high ground water in the project locations so dewatering is anticipated throughout the duration of the underground utility or stormwater work. Hydrologic calculations to establish TESC flow rates have not been performed. Based on past history at this site the dewatering flow will be the governing flowrate in terms of treatment capacity. Treatment capacity will have to match the dewatering pump rate. Based on past experience the dewatering pump rate is estimated to be 50 gpm per pump and there could be multiple pumps employed at once. Treatment will be through a settling tank and chitosan enhanced filter system before discharging into the storm system. The actual flow rate will be a function of the number of dewatering pumps in action at the time. There is potential for contaminated groundwater on the site in which case dewatering discharge will be made to the sanitary sewer. The general contractor will be responsible for monitoring discharge; actual monitoring to be performed by Clearwater Solutions or comparable sub-contractor. Turbidity would be monitored on a daily basis. Dust Control Generally speaking dust is not likely to be a problem. Grading on these project sites will be minimal and the amount of soil exposed at a time will be small. Water will be used for dust control if necessary. Flow Control Flow control will not be provided. The project is located in a direct discharge area. SWPPP Plan Design (Part B) The Stormwater Pollution Prevention Plan (SWPPP) is a stand-alone document that describes the Construction Best Management Practices (BMP’s). The SWPPP has been prepared under separate cover. The 12 elements and BMPs recommended are identified below: Element 1 – Mark Clearing Limits: A temporary safety fence will be installed around the perimeter. The edge of the concrete panel removal area will be spray painted with white paint. The safety fence may be coincidental with the site security fencing. Element 2 – Establish Construction Access: The site is currently paved, the asphalt will remain in place as long as possible. Once the driveway asphalt is removed a construction entrance per the City of Renton standard detail 215.10 could be employed. Sequentially a construction entrance might not be necessary. Wheel washing, street sweeping and street cleaning shall be employed as necessary to prevent sediment from tracking onto the Perimeter Road. 37 Element 3 – Control Flow Rates: This project is located in a direct discharge area for Cedar River and no flow control will be provided. Element 4 – Install Sediment Controls: All stormwater runoff from disturbed areas shall pass through triangular filtration dikes, storm drain inlet protection or temporary sediment tanks. Element 5 – Stabilize Soils: Exposed and unworked soils shall be stabilized with Plastic Coverings per City of Renton standard detail 213.30 or an equivalent protection. Element 6 – Protect Slopes: The site is relatively flat, where there are no slopes. Element 7 – Protect Drain Inlets: Catch basin filters will be installed per City of Renton standard detail 216.30 on all catch basins located within the construction area and immediately downstream of the project areas. Element 8 – Stabilize Channels and Outlets: The stormwater will be treated with commercial filtration tanks before being released into the existing system. Element 9 – Control Pollutants: The following measures will be taken: All vehicles, equipment and petroleum product storage/dispensing areas will be inspected regularly to detect any leaks or spills, and to identify maintenance. Fueling will be conducted on hard pavement. Spill prevention measures, such as drip pans, will be used when conducting maintenance and repair of vehicles or equipment. In order to perform emergency repairs on site, temporary plastic will be placed beneath and, if raining, over the vehicle. Contaminated surfaces shall be cleaned immediately following any discharge or spill incident. Process water and slurry resulting from concrete work will be prevented from entering waters of the state by implementing Concrete Handling measures (BMP C151), pH neutralization will be utilized if necessary. The following BMP’s from the Stormwater Management Manual for Western Washington will be used: BMP C151: Concrete Handling BMP C152: Saw cutting and Surfacing Pollution Prevention BMP C153: Material Delivery, Storage and Containment BMP C154: Concrete Washout Area BMP C251: Construction Stormwater Filtration BMP C252: High pH Neutralization BMP C253: pH control for High pH Water S406 Streets/Highways/Applicable BMP’s S407 Dust Control for Disturbed Land Areas and Unpaved Parking Lots S409 Fueling at Dedicated Stations S411 Landscaping and Lawn/Vegetation Management S417 Maintenance for Stormwater Drainage and Treatment Systems S419 Mobile Fueling of Vehicles and Heavy Equipment S424 Roof/Building Drains at Manufacturing and Commercial Buildings 38 S430 Urban Streets Element 10 – Control Dewatering: The water from foundations, vaults, and trenches will be pumped to the filtration tanks, treated and released into the storm drain system. The dewatering flow rate will set the flowrate for the treatment system. Element 11 – Maintain BMPs: All temporary and permanent Erosion and Sediment Control (ESC) BMPs shall be inspected, maintained and repaired as needed to ensure continued performance of their intended function. Element 12 – Manage the Project: During construction consideration shall be given to removing and replacing the pavement in stages. Site inspections and monitoring will be conducted in accordance with Special Conditions S4 of the CSWGP. The contractor will update the SWPPP as necessary and keep a copy on site at all times. 39 9.0 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT 9.1 Bond Quantities The bond quantities worksheet has not been prepared for the initial Shoreline Permit submittal. 9.2 Flow Control and Water Quality Facility Summary Sheet and Sketch N/A - These projects will not include flow control or water quality facilities. 9.3 Declaration of Covenant for Privately Maintained Flow Control and Water Quality Facilities N/A - These projects will not include flow control or water quality facilities. 40 10.0 OPERATIONS & MAINTENANCE MANUAL The Operations and Maintenance Manual (Appendix B) will be developed in the future submittal. In general, there will be no new storm sewer systems added. Project 2 will provide a new fuel spill containment vault. The manual document is meant to be a standalone document and will be incorporated into the larger Boeing operational program. The final O & M Manual will be published post construction with the as-built drawings and full documentation of equipment cut sheet submittals and manufacturer’s maintenance procedures. 41 11.0 ON-SITE BPMS The three projects situated within TDA-1 and TDA-2 result in greater than 2,000 square feet of replaced impervious surface within each TDA. TDA-1 - Project 1 = 3,300 square feet of replaced impervious surface TDA-2 - Project 2 = 1,650 square feet + Project 3 = 1,600 square feet for a Total = 3,250 square feet. The totals for both TDA trigger Core Requirement #9 for the targeted replaced impervious surface. As indicated within this TIR both TDA’s qualify for the Direct Discharge Exemption per Section 1.2.3.1, Table 1.2.3.B as listed above in this TIR. Per Section 1.2.9.1 A the Direct Discharge Exemptions results in the project not being required to achieve the LID performance standards, nor consider bioretention, permeable pavement, or full dispersion. The projects are required to the maximum extent feasible to provide the following BMPS for the target impervious surfaces: Implement full infiltration as detailed in Appendix C, Section C.2.2. Basic Dispersion per Appendix C, Section C.2.4. The requirements for implementation have been evaluated for each project and TDA below: TDA-1 (Project 1) Project 1 – Gate D-50: Access Reconfiguration Project 1 is situated within a fully paved parking and drive area and the proposed replaced impervious surface is a small section within that area. Directly adjacent to the proposed replaced impervious area is the storm drain collection system for the area. Below is an evaluation for Project 1 of the available on- site BMPS. Implement full infiltration as detailed in Appendix C, Section C.2.2 Section C.2.2.2 Minimum Design Requirements for Full infiltration provides 15 requirements that must be meet in order for Full Infiltration to be applicable a project. Item 1a reads that “Existing soils must be coarse sands or cobbles or medium sands and cannot be comprised of fill materials where the infiltration device will be located. The entirety of the Project 1 site is fill materials. Based on this full infiltration is not applicable for this site. Basic Dispersion per Appendix C, Section C.2.4. Section C.2.4.1 Minimum Design Requirements for Basic Dispersion provides 10 requirements that must be meet in order for Basic Dispersion to be a applicable a project. Due to the nature of the area surrounding our project and the proximity of the existing storm drainage facilities it is not feasible for the project to comply with items 1 or 2. Construction of a dispersion facility as identified in item 1 and a vegetated flow path would result in major changes to the existing storm drainage system as well as the surrounding site. Furthermore the area experiences high ground water and localized flooding due to its proximity and overall elevation relative to the Cedar River. Attempting basic dispersion on for this project without further exasperating the localized flooding is not feasible without substantial modifications to the surrounding pavement and storm drainage facilities and would 42 result in the project not being economically viable. Based on this basic dispersion is not applicable for this site. Based on the analysis of the available On-Site BMPS for use on Project 1 it is not feasible to comply with Core Requirement #9. TDA-2 (Projects 2 and 3) Project 2 – Apron D: New Fuel Spill Containment Vault Project 2 is situated within a fully paved active apron. Activates on the apron include the use of environmentally hazardous chemicals and the transportation and loading of fuel onto aircraft. Runoff from the site is carefully collected monitored and processed through oil water separators before leaving the site through a larger interceptor system and ultimately discharged through a submerged pipe into Lake Washington ¾ of a mile north of the project area. Implement full infiltration as detailed in Appendix C, Section C.2.2 Section C.2.2.2 Minimum Design Requirements for Full infiltration provides 15 requirements that must be meet in order for Full Infiltration to be applicable a project. Item 1a reads that “Existing soils must be coarse sands or cobbles or medium sands and cannot be comprised of fill materials where the infiltration device will be located. The entirety of the Project 1 site is fill materials. Based on this full infiltration is not applicable for this site. Basic Dispersion per Appendix C, Section C.2.4. Section C.2.4.1 Minimum Design Requirements for Basic Dispersion provides 10 requirements that must be meet in order for Basic Dispersion to be a applicable a project. Due to the projects location within an active apron it is not feasible for the project to comply with items 1 or 2. Construction of a dispersion facility as identified in item 1 and a vegetated flow path are not acceptable within a foreign object or debris (FOD) critical area such as the apron. The implementation of a vegetated flow path within the confines of an active apron would not support aircraft operations or operation of manufacturing equipment used on the apron. Attempting basic dispersion for this project without preventing operations on the apron or generating additional FOD would require substantial modifications to the entire apron and result in the project not being economically viable. Based on this basic dispersion is not applicable for this site. Project 3 – Building 4-42: Sewer Lift Station Replacement Project 3 is situated within a fully paved parking area and is situated between an existing building and the adjacent property line. Runoff from the site is collected monitored and processed through oil water separators before leaving the site through a larger interceptor pipe system and ultimately discharges through a submerged pipe into Lake Washington ¾ of a mile north of the project area. Implement full infiltration as detailed in Appendix C, Section C.2.2 Section C.2.2.2 Minimum Design Requirements for Full infiltration provides 15 requirements that must be meet in order for Full Infiltration to be applicable a project. 43 Item 1a reads that “Existing soils must be coarse sands or cobbles or medium sands and cannot be comprised of fill materials where the infiltration device will be located. The entirety of the Project 1 site is fill materials. Based on this full infiltration is not applicable for this site. Basic Dispersion per Appendix C, Section C.2.4. Section C.2.4.1 Minimum Design Requirements for Basic Dispersion provides 10 requirements that must be meet in order for Basic Dispersion to be a applicable a project. Due to the overall nature of the area surrounding our project and the proximity of the existing building and property line it is not feasible for the project to comply with items 1 or 2. Construction of a dispersion facility as identified in item 1 and a vegetated flow path would result in major changes to the existing storm drainage system as well as the surrounding site. Attempting basic dispersion for this project would require extensive modifications to the surrounding facilities and result in the project not being economically viable. Based on this basic dispersion is not applicable for this site. Based on the analysis of the available On-Site BMPS for use on TDA-2 (Project 2 & 3) it is not feasible to comply with Core Requirement #9. On-Site BMP Conclusion As determined above through the analysis of Section 1.2.9 Core Requirement #9 it is not feasible to implement the available on-Site BMPS for the projects and TDA’s covered within this TIR. Appendix A CSWPPP Plans Appendix B Operations and Maintenance Manual Note: The final manual will be published with the record drawings when complete documentation from pump and equipment manufacturers is available. Appendix C City of Renton Sensitive Areas Mapping k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkD r SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Talbot Rd SN 3rd St RainierAveS 164thAveSETukwila Pk w y SPuget Dr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St I n t e r u r b a n Av e S WilliamsAveNBronsonW a y N NE7thSt 124thAveSES 7th St SERenton IssaquahRd Rai ni er AveNNewcastle Way CoalCr e e k PkwySESW 41st St T a ylo r P l N WNESunsetBlvdWellsAveNUnionAveNEN E 3 rd S tHa r die A v eSWS180th St Maple Valley Hwy 140thAveSES G ra d yWayS 2 1 s tSt BensonRdSRe nt o n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrR d SE 168th St Beaco n A v e S 68thAveSLoganAveN108thAveSEForestDr SE S2ndSt 141 s tAve S ERainierAveS 156thAveSES E 183rd StBenson Dr SS 124th StS 43rd St Airport Way S W G radyW a y S E J o n e s RdSunsetBlvdN Puget Dr SESE 204th W aySW 34th StMo n s ter RdSW S E 1 4 2 n d P lWestValleyHwySSEMay ValleyRd SunsetBlvdNS C a r r RdHouserWayNNewcastle GolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRai ni er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVal leyHwyWestValleyHwyParkAveN108thAveSE6 6 t h Av e SWMercerWayWMercer W ay LakemontBlvdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Aquifer Protection Zone 1 Zone 1 Modified Zone 2 Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN APPROXIMATE PROJECT LOCATION k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkD r SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Talbot Rd SN 3rd St RainierAveS 164thAveSETukwila Pk w y SPuget Dr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St I n t e r u r b a n Av e S WilliamsAveNBronsonW a y N NE7thSt 124thAveSES 7th St SERenton IssaquahRd Rai ni er AveNNewcastle Way CoalCr e e k PkwySESW 41st St T a ylo r P l N WNESunsetBlvdWellsAveNUnionAveNEN E 3 rd S tHa r die A v eSWS180th St Maple Valley Hwy 140thAveSES G ra d yWayS 2 1 s tSt BensonRdSRe nt o n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrR d SE 168th St Beaco n A v e S 68thAveSLoganAveN108thAveSEForestDr SE S2ndSt 141 s tAve S ERainierAveS 156thAveSES E 183rd StBenson Dr SS 124th StS 43rd St Airport Way S W G radyW a y S E J o n e s RdSunsetBlvdN Puget Dr SESE 204th W aySW 34th StMo n s ter RdSW S E 1 4 2 n d P lWestValleyHwySSEMay ValleyRd SunsetBlvdNS C a r r RdHouserWayNNewcastle GolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRai ni er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVal leyHwyWestValleyHwyParkAveN108thAveSE6 6 t h Av e SWMercerWayWMercer W ay LakemontBlvdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Coal Mine Hazards Severity HIGH MODERATE UNCLASSIFIED Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN APPROXIMATE PROJECT LOCATION k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkD r SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Talbot Rd SN 3rd St RainierAveS 164thAveSETukwila Pk w y SPuget Dr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St I n t e r u r b a n Av e S WilliamsAveNBronsonW a y N NE7thSt 124thAveSES 7th St SERenton IssaquahRd Rai ni er AveNNewcastle Way CoalCr e e k PkwySESW 41st St T a ylo r P l N WNESunsetBlvdWellsAveNUnionAveNEN E 3 rd S tHa r die A v eSWS180th St Maple Valley Hwy 140thAveSES G ra d yWayS 2 1 s tSt BensonRdSRe nt o n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrR d SE 168th St Beaco n A v e S 68thAveSLoganAveN108thAveSEForestDr SE S2ndSt 141 s tAve S ERainierAveS 156thAveSES E 183rd StBenson Dr SS 124th StS 43rd St Airport Way S W G radyW a y S E J o n e s RdSunsetBlvdN Puget Dr SESE 204th W aySW 34th StMo n s ter RdSW S E 1 4 2 n d P lWestValleyHwySSEMay ValleyRd SunsetBlvdNS C a r r RdHouserWayNNewcastle GolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRai ni er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVal leyHwyWestValleyHwyParkAveN108thAveSE6 6 t h Av e SWMercerWayWMercer W ay LakemontBlvdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Erosion Hazard Severity High Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN APPROXIMATE PROJECT LOCATION RentonKent Newcastle King CountyTukwilaMercer Island Bellevu e Lake Washington Lake Youngs Panther Lake Lake Boren Cedar RiverBlack River May Creek Springbrook Creek Cougar MountainCougar Mountain Coal Creek ParkCoal Creek Park Cedar River Natural ZoneCedar River Natural Zone May Creek ParkMay Creek Park Soos Creek Park and TrailSoos Creek Park and Trail Black River Riparian ForestBlack River Riparian Forest McGarvey Open SpaceMcGarvey Open Space Maplewood Community ParkMaplewood Community Park ValleyValley BensonBenson HighlandsHighlands West HillWest Hill East PlateauEast Plateau SE 192ND STTALBOT RD S140TH AVE SERAI N I E R A V E S EAST VALLEY RDSE 168TH ST RENTON A V E S116TH AVE SENE 12TH STE M ERCER WAY148TH AVE SENE 7TH S T84TH AVE SHOQUIAM AVE NENEWCASTLE W AY W M E RCER WAY S 128TH ST SW 41ST ST PARK AVE N128TH AVE SESE JONES R D E VALLEY HWYSE 72ND ST SE 164TH ST NILE AVE NEN 10TH S T SE 183RD S TUNION AVE NE156TH AVE SEUNION AVE SENE 2ND ST 148TH AVE SESE 164TH STLIND AVE SWUNION AVE NE116TH AVE SESW 7TH ST N 8TH ST EDMONDS AVE NEPUGET DR S E NE 27TH ST 156TH AVE SERENTON AVE S BENSON RD SMONROE AVE NE116TH AVE SENE 4TH ST SR 515 SUNS E T BLV D N E PARK AVE NM APLE VALLEY HWY SW 43RD ST NE 3RD STLOGAN AVE NSW SU NSET BLVD SW GRADY W A Y N 3RD STRAINIER AVE N140TH WAY S ESR 167108TH AVE SEN 6TH ST S 2ND S T 108TH AVE SESR 515[^405 [^405 Effective FEMA Flood Insurance Rate Map µ Legend Renton City Limits Zone AE, A, AH, AO - Regulatory Zone X - Non Regulatory 0 0.5 10.25 Miles Public Works - Surface Water Utility Print Date: 11/05/2012 Data Sources: City of Renton, FEMA FIRM revised May 16, 1995. Cedar River flood hazard area updated with FEMA Cedar River LOMR (Case No. 06-10-B569P) approved December 4, 2006. This document is a graphic representation, not guaranteed to survey accuracy, and is based on the best information available as of the date shown. This map is intended for City display purposes only. APPROXIMATE PROJECT LOCATION k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkD r SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Talbot Rd SN 3rd St RainierAveS 164thAveSETukwila Pk w y SPuget Dr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St I n t e r u r b a n Av e S WilliamsAveNBronsonW a y N NE7thSt 124thAveSES 7th St SERenton IssaquahRd Rai ni er AveNNewcastle Way CoalCr e e k PkwySESW 41st St T a ylo r P l N WNESunsetBlvdWellsAveNUnionAveNEN E 3 rd S tHa r die A v eSWS180th St Maple Valley Hwy 140thAveSES G ra d yWayS 2 1 s tSt BensonRdSRe nt o n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrR d SE 168th St Beaco n A v e S 68thAveSLoganAveN108thAveSEForestDr SE S2ndSt 141 s tAve S ERainierAveS 156thAveSES E 183rd StBenson Dr SS 124th StS 43rd St Airport Way S W G radyW a y S E J o n e s RdSunsetBlvdN Puget Dr SESE 204th W aySW 34th StMo n s ter RdSW S E 1 4 2 n d P lWestValleyHwySSEMay ValleyRd SunsetBlvdNS C a r r RdHouserWayNNewcastle GolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRai ni er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVal leyHwyWestValleyHwyParkAveN108thAveSE6 6 t h Av e SWMercerWayWMercer W ay LakemontBlvdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Landslide HazardSeverityVery HighHighModerateUnclassified Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN APPROXIMATE PROJECT LOCATION k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNEE Valley Hwy84thAveSNEParkD r SW 7th St SE 128th St SE 192nd StLindAveSWMainAveSS 132nd St Factory PlN Talbot Rd SN 3rd St RainierAveS 164thAveSETukwila Pk w y SPuget Dr NE 4th St S 3rd St S 1 2 9 th S t68thAveSSWSunsetBlvd SW 16th St 116thAveSEN 4th St I n t e r u r b a n Av e S WilliamsAveNBronsonW a y N NE7thSt 124thAveSES 7th St SERenton IssaquahRd Rai ni er AveNNewcastle Way CoalCr e e k PkwySESW 41st St T a ylo r P l N WNESunsetBlvdWellsAveNUnionAveNEN E 3 rd S tHa r die A v eSWS180th St Maple Valley Hwy 140thAveSES G ra d yWayS 2 1 s tSt BensonRdSRe nt o n AveS87thAveS128thAveSE148thAveSESW 43rd St SEC arrR d SE 168th St Beaco n A v e S 68thAveSLoganAveN108thAveSEForestDr SE S2ndSt 141 s tAve S ERainierAveS 156thAveSES E 183rd StBenson Dr SS 124th StS 43rd St Airport Way S W G radyW a y S E J o n e s RdSunsetBlvdN Puget Dr SESE 204th W aySW 34th StMo n s ter RdSW S E 1 4 2 n d P lWestValleyHwySSEMay ValleyRd SunsetBlvdNS C a r r RdHouserWayNNewcastle GolfClubRd S 133rd St WilliamsAveSWellsAveSEMercerWay154thPlSEDuvallAveNELoganAveSMonroeAveNESunsetBlvdNEEdmondsAveNEStevens AveNWRai ni er AveSTalbotRdSOakesdaleAveSWTaylorAveNW164thAveSERainierAveSWestVal leyHwyWestValleyHwyParkAveN108thAveSE6 6 t h Av e SWMercerWayWMercer W ay LakemontBlvdSE132ndAve SELakeWashingtonBlvdNE140thWaySE East Valley Rd68thAveS³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Steep Slopes Percent Range >15% & <=25% >25% & <=40% >40% & <=90% >90% Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN APPROXIMATE PROJECT LOCATION Appendix D Geotechnical Investigation Rpt1707 S&EE S&EE SOIL & ENVIRONMENTAL ENGINEERS, INC. 16625 Redmond Way, Suite M 124, Redmond, Washington 98052, www.SoilEnvironmental.com (425) 868-5868 March 18, 2017 Ms. Cynthia Johnson The Boeing Company Cynthia.a.johnson4@boeing.com CC: Mr. Michael Sullivan Letter Report Geotechnical Engineering Services Proposed Gate D-50 Modification Boeing Renton Plant Dear Cynthia: INTRODUCTION Soil & Environmental Engineers, Inc. (S&EE) has been retained by you to perform a geotechnical evaluation for the above-referenced project. The project will involve re-configuration of the traffic flow through the existing D-50 gate. I understand that new underground electrical lines will be constructed, some minor re- grading will be performed, and new asphalt pavement will be installed. SURFACE AND SUBSURFACE CONDITIONS The project site is located in the southeastern portion of Renton Municipal Airport. Figure 1, which is included at the end of this report, shows the site location. The existing gate is surrounded by buildings, and the site surface is covered with asphalt pavement. The gate is accessed by East Perimeter Road which borders the west side of Cedar river and its levee. The site surface is relatively flat. S&EE performed a previous soil test boring, B-2, at the location shown in Figure 1. Based on our knowledge of soil conditions in the area, it is our opinion that the boring data are representative of the subsurface conditions at D-50 gate. The boring shows that the subsurface conditions at the site include fill over alluvial soils. The former is about 10 to 11 feet thick and consists of loose to medium dense silty sand, gravel and sand. The alluvial soils include a soft to medium dense silt and sand layer to a depth of about 30 feet, then dense to very dense sand and gravel below. This sand and gravel layer turns into a dense silty sand at a depth of 97.5 feet. Boring B-2 was terminated in this soil. Ms. Cynthia Johnson March 18, 2017 Page 2 Rpt1707 S&EE Groundwater was encountered at a depth of 7 feet during the drilling of Boring B-2. Based on our experience in the project area, the groundwater depth will vary with season and precipitation, and will fluctuate between depths of 5 to 10 feet. CONCLUSION AND RECOMENDATION General It is our opinion that the proposed project is feasible from a geotechnical standpoint. The areas disturbed by construction will be stabilized and should remain stable. It is our further opinion that the project will not incur any soil instability. Underground Utility Construction Subgrade preparation and trench backfill should be monitored by a site inspector from our office. All loose soil cuttings should be removed from the excavation subgrade prior to the placement of bedding materials. In the event that soft or loose soil is encountered at subgrade, the subgrade should be over-excavated for a minimum of 6 inches. A non-woven geotextile having a minimum grab tensile strength of 200 pounds should be installed at the bottom of the over-excavation and the over-excavation be backfilled with 1-1/4” minus crushed rock. The geotextile should be installed flat with all wrinkles removed and have 12 inches overlap. The rock should be compacted to a firm a non-yielding condition using a mechanical compactor approved by our site inspector. The onsite soils are suitable for use as backfill. The soils are slightly moisture sensitive. As such, the contractor should protect the excavated soils from rain. Pavement We recommend that all pavement subgrades be proof-rolled to identify areas of soft, wet, organic, or unstable soils. Proof-rolling should be accomplished with a heavy (12-ton) vibratory roller, front-end- loader, or loaded dump truck (or equivalent) making systematic passes over the subgrade while being observed by a site inspector from our office. In areas where unstable and/or unsuitable subgrade soils are observed, the subgrade should be over-excavated a minimum 6 inches. Woven geotextile having a minimum 200 pounds grab tensile strength may be necessary for additional subgrade stabilization. The geotextile, if used, should be placed with 12-inch overlaps with all wrinkles removed. LOGAN AVEEXIT 5 900 515 900 EXIT 4 EXIT 4A 405 405 167 EXIT 4B 405 169 167 D9 D40 D35 D30 EXIT 2B From Issaquah From Bellevue 4-04 Medical Clinic Safety LK WASHINGTON BLVD N From Seattle LAKE WASHINGTON Boeing Employees Flying Association RA I N I E R A V E N 4-41 4-20 4-21 4-69 4-402 4-78 4-77 4-79 4-71 4-42 4-45 Apron D 5-27 5-403 5-288 9 7 1 16 17 15 12 13A 14 10-18 GARDEN AVE N N EVA NEDRAGEVA KRAPN 8TH ST 11 10-16 10-13 4-89 4-88Badge Office 10-20 10-80 Hub 4-17 4-90 4-75 4-81 4-82 4-83 4-86 Renton Airport From I-5 From Longacres Park From Kent and Auburn From Enumclaw Apron A Apron BRAINIER AVE N AIRPORT WAY RE N T O N A V E S S 3RD ST S 2ND ST Renton Stadium 5-09 5-02 S U N S E T B L V D W BENSON RD S M. L . K I N G J R W A Y S SW 10TH S T OAKESDALE AVE SW SW 19TH ST SW 16TH ST DNOMYAR WS EVA WS EVA DNILTALBOT RD S EVA NIAM HOUSER WAY N LOGAN AVE N CEDAR RIVER N 1 S T S T BRONSON W AY N S 4TH ST N 3RD ST N 4TH ST N NEDRAG S EVA TTENRUBLOGAN AVE S SW 7TH ST GRADY WA Y S W N EVA YROTCAFMONSTER RD 5-50 5-51 N EVA SMAILLIW7-206 Triton Tower Two 7-207 Triton Tower Three From Seattle 5-08 Washington – Renton North 8th and Park Avenue North, Renton, WA 98055 N 5TH ST N 6TH ST N 8TH ST 5-45 Revised 03-09 Boeing North Bridge Boeing South Bridge 7-244 Rivertech Corporate Center HOUSER WAY BYPASS Copyright 2009© The Boeing Company. All rights reserved.PARK AVE N WELLS AVE N POWELL AVE SW NACHES AVE 4-95Shed 4-96GuardShack Employee gates AMS Turnstile gates Fence lines Boeing property General parking Restricted parking Bus stop Helistop 51 52 53 54 55 51 52 53 54 55 A B C D E F A B D E F C D44 D41 D4 D32Boring B-2 Figure 1 - Site Plan and Location of Previous Boring SITE ENGINEERING PLANNING SURVEYING