HomeMy WebLinkAboutRS_Drainage_Report_220708_v1TRANSMITTAL FORM
Phone: 206-382-5200 Fax: 206-382-5222
SENT BY: Sandi Wise
1001 Fourth Avenue, Suite 3100 | Seattle WA 98154
REMARKS/SPECIAL INSTRUCTIONS: None
DATE: July 8, 2022 TO: Rick Capka, Sound Transit
FROM: Rob Gorman, WSP PROJECT NO.: 160363P3.003
TASK NO.: 03.08
PROJECT NAME: I-405 Bus Rapid Transit (BRT) and Bus Base North SOUND TRANSIT REFERENCE:
AE 0054-17
cc:
We are pleased to submit the following final Phase 3 deliverable:
AE 0054-17 03.08.G South Renton Transit Center Remediation Work - Storm Drainage Report
If you have any questions or concerns, please contact us.
I-405 corridor
South Renton Transit
Center Remediation Project,
Storm Drainage Report
July 2022
Stride program: I-405 corridor
Page i | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
Consultant Quality Control Form
Version Title Date Originator/ Drafted by Reviewed by Approved by Notes, as required
0 South Renton
Transit Center Remediation Project, Storm Drainage Report – Draft
05/18/2022 M. Giseburt J. Erickson Rob
Gorman
Initial issue.
1 South Renton Transit Center
Remediation Project, Storm Drainage Report
07/08/2022 M. Giseburt J. Erickson Rob Gorman Revised to address ST
comments
Stride program: I-405 corridor
Page ii | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
Table of Contents
1 INTRODUCTION ......................................................................................................................... 1
2 CORE REQUIREMENT #5: CONSTRUCTION STORMWATER POLLUTION PREVENTION .............................................................................................................................. 3
3 SPECIAL REQUIREMENT #6: AQUIFER PROTECTION AREA ............................................. 4
4 REFERENCES ............................................................................................................................ 6
Figures
Figure 1-1 Stride Project ......................................................................................................... 2
Figure 1-2 Drainage Basins, Subbasins, and Site Characteristics ......................................... 3
Appendices
Appendix A South Renton Transit Center Remediation Plan
Appendix B Erosion and Sediment Control Plan
Appendix C City of Renton Wellhead Protection Area Map
Stride program: I-405 corridor
Page iii | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
Acronyms and Abbreviations
BMP best management practice COR City of Renton CSWPP Construction Stormwater Pollution Prevention Plan ESC Erosion and Sediment Control project Sound Transit STRIDE Project RMC Renton Municipal Code ROW right-of-way SRTC South Renton Transit Center
ST Sound Transit SWDM Surface Water Design Manual SWPPS Stormwater Pollution Prevention Spill Plan
TDA Threshold Discharge Area
Stride program: I-405 corridor
Page 1 | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
1 INTRODUCTION
Sound Transit (ST) is proposing a new transit center in South Renton as part of the overall Stride Program for the I-405 corridor. The overall Stride Program project area and the proposed station locations, including the South Renton Transit Center, are shown on Figure 1-1.
The ultimate plan for the South Renton Transit Center (SRTC) includes redeveloping an existing developed site located at the northeast quadrant of the intersection of S Grady Way and Rainier
Ave S with a new parking garage and transit center. The project would also include improvements to adjacent roads. WSP previously prepared a separate Preliminary Storm Drainage Report that documents (at 30% design level) drainage requirements and
considerations for the future SRTC and associated roadway improvements (WSP, May 2022).
To facilitate site preparation, ST completed some soils and groundwater testing and found elevated levels of some contaminants that require remediation. ST contracted separately with
Shannon and Wilson, Inc. to develop a remediation design and construction documents.
The remediation work includes over 5,000 square feet of pavement removal to excavate and dispose of and/or treat some of the contaminants. A copy of the remediation design plans is
included in Appendix A.
In discussions between ST and the City of Renton (City), it was determined that a limited stormwater report would be required to support the remediation work. More specifically, the City
requested a brief memorandum that addresses how the remediation work will meet the City’s storm drainage Core Requirement #5 and Special Requirement #6 detailed in the 2022 Surface Water Design Manual (SWDM) (Renton 2022). Core Requirement #5 is associated with Construction Stormwater Pollution Prevention. Special Requirement #6 is associated with work in Aquifer Protection Areas.
The previous Preliminary Storm Drainage Report (WSP, May 2022) document, which is on file with the City, includes a site description, a downstream analysis, and how the core and special requirements are anticipated to be addressed for the ultimate site improvement for the various project Threshold Discharge Areas. Figure 1-2, excerpted from the May 2022 WSP report, shows the site. The remediation work is planned within TDA SRTC 1.2.
The remainder of this memorandum discusses these two requirements and how they are being
addressed.
Stride program: I-405 corridor
Page 2 | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
Figure 1-1 Stride Project
Stride program: I-405 corridor
Page 3 | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
Figure 1-2 Drainage Basins, Subbasins, and Site Characteristics
2 CORE REQUIREMENT #5: CONSTRUCTION STORMWATER POLLUTION PREVENTION
To prevent sediment transport and pollutant discharges as well as other impacts related to land-disturbing and construction activities, Erosion and Sediment Control (ESC) measures and
Stormwater Pollution Prevention and Spill Control (SWPPS) measures that are appropriate to the project site must be applied through a comprehensive Construction Stormwater Pollution Prevention Plan (CSWPP) as described in the City’s Surface Water Design Manual.
Appendix B includes a preliminary ESC plan. It is noted that it is conceptual. As a part of the construction contract, ST will require the successful bidder (i.e., Contractor) to prepare a final ESC plan based on their strategy for completing the remediation work. This final ESC plan will
need to be approved by both ST and the City prior to authorizing the work to begin.
The ESC features proposed on-site include a stockpile and staging area designated by the Contractor and catch basin inserts for all catch basins in proximity of the project work area.
These features are to reduce transport of sediment from the project area to downstream
Stride program: I-405 corridor
Page 4 | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
drainage facilities and properties. Any pollutants potentially present from excavation will be handled and controlled following SWPPS standards.
To comply with CSWPP performance and compliance, the Contractor will identify a CSWPP Supervisor that needs to be approved by the City (per Section 1.2.5.2 of the City’s SWDM). The Supervisor will review ESC and SWPPS measures and may monitor discharges for sediment
and pollutants. Additional ESC or SWPPS measures may be required based on monitoring results. If applicable, any wet season construction (October 1 to April 30) will require additional ESC measures and a separate plan will need to be submitted before commencing work at the
site. The site area will be stabilized and ESC and SWPPS measures removed prior to receiving final construction approval.
3 SPECIAL REQUIREMENT #6: AQUIFER PROTECTION AREA
Special Requirement #6 states that a project proposed in an Aquifer Protection Area (APA)
requires certain considerations based on APA Zone designation (Zone 1 or Zone 2). The requirement either prohibits certain drainage facilities (Zone 1) or requires lining open facilities or conveyance systems (Zone 2). The SRTC project area is within Zone 2 of the Downtown
Wellfield. Therefore, the SWDM special requirements for Zone 2 apply to the project. A map with the Wellhead Protection Area Zones layer of COR Maps displayed (extracted from https://maps.rentonwa.gov/Html5viewer/Index.html?viewer=cormaps) is included in Appendix C.
The SWDM requirement for Zone 2 is as follows:
The following may require a liner in accordance with the design criteria in Section 6.2.4: a. Facilities that allow runoff to have direct contact with the soil, such as flow control and water quality treatment ponds, stormwater wetlands, filter strips, and infiltration facilities. b. Open channel conveyance systems that are not concrete lined, such as ditches or swales.
The project is only providing soil remediation and does not propose any of the above-listed
features that would require a liner, and thus the requirement does not apply.
In addition to the Special Requirement #6, the Renton Municipal Code was reviewed for applicable requirements. The project area is within a Wellhead Protection Area as defined by
RMC 4-3-050, Critical Areas Regulations. The Critical Areas Regulation defines any area within a wellhead capture zone be subject to critical areas regulations and requires that considerations be made to address hazardous materials, pesticides, and groundwater impacts within the
Wellhead Protection Area. It further references RMC 4-9-015 Aquifer Protection Area Permits, that establishes permit procedures, operating permits, closure permits, and uniform standards for release reporting, emergency response, closure, and abandonments.
The remediation plan for the project does not introduce any hazardous materials or pesticides and would not degrade groundwater quantity or quality. Rather, the plan removes diesel (hazardous) and lube oil (non-hazardous) from four separate areas of the site. In one of these
four areas, a remediation agent (Regenesis PersulfOxtm) will be mixed with backfill material to stimulate the degradation of latent contaminants. In a fifth area, the plan calls for injecting a
Stride program: I-405 corridor
Page 5 | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
biostimulation material (Regenesis Petrofixtm). Together, the excavation and soil treatment will improve groundwater quality.
It is also noted that as part of the SRTC Preliminary Storm Drainage Report (WSP May 2022), an infiltration investigation for the project site was completed, including two pilot infiltration tests, which determined the site soils have very low infiltration rates that would reduce the risk for
groundwater contamination.
To satisfy Special Requirement #6, ST plans to make compliance with RMC 4-03-050 and 4-9-015 a requirement for the construction Contractor. In addition, the Contractor will need to
determine, with input from the City, whether a Closure Permit (per RMC 4-9-15) is required.
Stride program: I-405 corridor
Page 6 | AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report July 2022
4 REFERENCES
City of Renton Public Works Department Surface Water Utility (City of Renton). 2022. 2022 City
of Renton Surface Water Design Manual. Effective June 22, 2022.
WSP USA, Inc. 2022. Preliminary Storm Drainage Report – South Renton Transit Center. Prepared for Sound Transit. May.
AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report
I-405 corridor
South Renton Transit Center Remediation Plan
ISSUED FOR BID
SOUTH RENTON TRANSIT CENTER REMEDIATION PROJECT
CONTRACT NO. RTA/CN 0188-21
VOLUME 3 OF 4
CONTRACT DRAWINGS
MARCH, 2022
AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report
I-405 corridor
Erosion and Sediment Control Plan
TESC NOTES AND CONSTRUCTION SEQUENCE
SOUTH RENTON TC
TESC-N
1 ----
AS NOTED----
----
----
----No.DATE DSN CHK APP REVISION
SUBMITTED BY:DATE:REVIEWED BY:DATE:DATE:
CONTRACT No.:
FILENAME:
SCALE:DRAWING No.:
SHEET No.:REV:LINE IS 1" ATFULL SCALEDESIGNED BY:
DRAWN BY:
CHECKED BY:
APPROVED BY:07/06/22 | 3:33 PM | USCU705560C:\BMS\WSP-US-PW-02\D0313689\TESC_REMED_NOTES.DWGTESC_REMED_NOTES FACILITY ID:
PHASE 3 - 30% SUBMITTAL I-405 BRT
AE 0054-17
04/04/2022PRELIMINARY 405
R. GORMAN 04/04/2022
GENERAL EROSION AND SEDIMENT CONTROL NOTES
1.THESE GENERAL EROSION AND SEDIMENT CONTROL NOTES, TOGETHER WITH DETAIL 1,
THIS DWG, CONSTITUTE A CONCEPTUAL TEMPORARY EROSION AND SEDIMENT CONTROL
(TESC) PLAN. THE CONTRACTOR IS REQUIRED TO SUBMIT A DETAILED STORMWATER
POLLUTION AND PREVENTION PLAN (SWPPP) MEETING CITY REQUIREMENTS. THE TESC
MEASURES SHALL THEN BE IMPLEMENTED CONSISTENT WITH THE
CONTRACTOR-PREPARED SWPPP.
2.THE IMPLEMENTATION OF THESE ESC PLANS AND THE CONSTRUCTION, MAINTENANCE,
REPLACEMENT, AND UPGRADING OF THESE ESC FACILITIES IS THE RESPONSIBILITY OF THE
APPLICANT/ESC SUPERVISOR UNTIL ALL CONSTRUCTION IS APPROVED.
3.THE ESC FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO OR IN
CONJUNCTION WITH ALL CLEARING AND GRADING TO ENSURE THAT THE TRANSPORT OF
SEDIMENT TO SURFACE WATERS, DRAINAGE SYSTEMS, AND ADJACENT PROPERTIES IS
MINIMIZED.
4.THE ESC FACILITIES SHOWN ON THESE PLANS ARE THE MINIMUM REQUIREMENTS FOR
ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE ESC
FACILITIES SHALL BE UPGRADED AS NEEDED FOR UNEXPECTED STORM EVENTS AND
MODIFIED TO ACCOUNT FOR CHANGING SITE CONDITIONS (E.G. ADDITIONAL SUMP
PUMPS, RELOCATION OF DITCHES AND SILT FENCES, ETC.).
5.THE ESC FACILITIES SHALL BE INSPECTED DAILY BY THE APPLICANT/ESC SUPERVISOR AND
MAINTAINED TO ENSURE CONTINUED PROPER FUNCTIONING. WRITTEN RECORDS SHALL
BE KEPT OF WEEKLY REVIEWS OF THE ESC FACILITIES DURING THE WET SEASON (OCT. 1
TO APRIL 30) AND OF MONTHLY REVIEWS DURING THE DRY SEASON (MAY 1 TO SEPT. 30).
6.ANY AREAS OF EXPOSED SOILS, INCLUDING ROADWAY EMBANKMENTS, THAT WILL NOT
BE DISTURBED FOR TWO (2) DAYS DURING THE WET SEASON OR SEVEN (7) DAYS DURING
THE DRY SEASON SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED ESC
METHODS (E.G., SEEDING, MULCHING, PLASTIC COVERING, ETC.).
7.ANY AREA NEEDING ESC MEASURES NOT REQUIRING IMMEDIATE ATTENTION SHALL BE
ADDRESSED WITHIN FIFTEEN (15) DAYS.
8.THE ESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A
MINIMUM OF ONCE A MONTH OR WITHIN FORTY-EIGHT (48) HOURS FOLLOWING A
STORM EVENT.
9.AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO
ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES
SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH
SEDIMENT-LADEN WATER INTO THE DOWNSTREAM SYSTEM.
10.WHERE STRAW MULCH FOR TEMPORARY EROSION CONTROL IS REQUIRED, IT SHALL BE
APPLIED AT A MINIMUM THICKNESS OF 2 TO 3 INCHES.
11.NO STOCKPILING/STAGING WILL BE CONDUCTED WITHIN THE RIGHT OF WAY OR CITY
OWNED SITE. CONTRACTOR IS RESPONSIBLE FOR OBTAINING ITS OWN
STOCKPILE/STAGING AREAS.
12.PUBLIC STREETS SHALL BE CLEANED ONCE PER DAY OR AS DIRECTED BY THE CITY.
FLUSHING OF STREETS WITH WATER WILL NOT BE ALLOWED.
13.IN ACCORDANCE WITH THE DEPARTMENT OF ECOLOGY REQUIREMENTS, WASTEWATER
FROM CEMENT CONCRETE MASONRY, OR ASPHALT CONCRETE CUTTING, OR POURING
OPERATIONS SHALL NOT BE DISCHARGED INTO STORM DRAINAGE SYSTEMS OR SURFACE
WATERS. IMPERVIOUS SURFACES CONTAMINATED WITH SEDIMENT FROM GRIT AND
CUTTING, PLANNING, OR PULVERIZING OPERATIONS SHALL BE VACUUM-CLEANED TO
PREVENT CONTAMINANTS FROM ENTERING THE STORM DRAINAGE SYSTEM OR SURFACE
WATERS.
14.CATCH BASIN INSERTS SHALL BE PLACED AT ALL CATCH BASINS SHOWN ON SHEET 2 PER
COR STANDARD DETAIL 216.30, THIS SHEET.
15.INSTALL SILT FENCING ALONG THE DOWNSLOPE EDGE OF EXCAVATION AREAS PER COR
STANDARD DETAIL 214.00, THIS SHEET.
16.INSTALL STRAW BALES ALONG THE DOWNSLOPE EDGE OF THE STAGING/STOCKPILE AREA.
17.INSTALL STABILIZED CONSTRUCTION ENTRANCE WHERE SHOWN ON SHEET 2 PER COR
STANDARD DETAIL 215.10, THIS SHEET, EXCEPT MINIMUM LENGTH SHALL BE REDUCED
TO 30' OR AS REQUIRED BY COR.
18.TEMPORARY SEDIMENTATION POND MAY BE REQUIRED IN CONTRACTOR STAGING AREA
IF THE SILT FENCING IS NOT ADEQUATE.
19.KEEP PUBLIC AND PRIVATE ROADWAYS/PARKING LOTS, SIDEWALKS, AND TRAILS FREE OF
DEBRIS AND SEDIMENT.
20.DO NOT ALLOW SURFACE WATER TO INFILTRATE OR ENTER KNOWN AREAS OF
CONTAMINATION. CONSTRUCT TEMPORARY STORMWATER BYPASSES OR SANDBAG
DIVERSIONS AS NEEDED DURING CONSTRUCTION TO DIVERT STORMWATER AROUND
EXCAVATION ACTIVITIES AND MAINTAIN DRAINAGE OF UPSTREAM STORMWATER.
CONTRACTOR IS RESPONSIBLE FOR DESIGN OF SURFACE FLOW AND STORM DRAIN
BYPASS PLAN. SUBMIT AS PART OF FINAL ESC PLAN. STORM DRAIN BYPASS PLAN SHALL
ALSO ADDRESS THE DOWNSTREAM SYSTEM AND PREVENTION OF STORMWATER
ENTERING THE WORK AREA BY BACKING UP FROM DOWNSTREAM.
21. ALL DEWATERING AND RUNOFF WITHIN CONSTRUCTION AREAS SHALL BE TREATED VIA
SEDIMENTATION, FILTRATION THROUGH VEGETATION IN APPROVED AREAS, OR
PORTABLE FILTRATION SYSTEMS (UTILIZING TANKS AND FILTERS), AS NEEDED, PRIOR TO
DISCHARGE TO DOWNSTREAM SYSTEMS TO MEET ALL APPLICABLE LOCAL, STATE, AND
FEDERAL WATER QUALITY REGULATIONS. CONTRACTOR MAY ALSO DISCHARGE TO THE
SANITARY SEWER SYSTEM AFTER OBTAINING APPLICABLE PERMITS AND MEETING
PRETREATMENT REQUIREMENTS.
PRELIMINARY CONSTRUCTION SEQUENCE
1.SUBMIT TRAFFIC CONTROL PLAN, TESC PLAN, STAGING PLAN, UTILITY PROTECTION PLAN
AND MATERIALS SUBMITTALS.
2.ATTEND PRECONSTRUCTION CONFERENCE.
3.INSTALL TESC CONTROL MEASURES AND SET UP CONTRACTOR-OBTAINED
STOCKPILE/STAGING AREA.
4.CALL FOR UTILITY LOCATES.
5.SET UP SHORING, DEWATERING SYSTEM, AND STORM DRAIN BYPASS SYSTEMS AS
APPLICABLE.
6.CONDUCT REMEDIATION EXCAVATIONS, INJECTIONS, AND APPLICATIONS.
7.UPON COMPLETION AND APPROVAL COMPLETE FINAL PAVEMENT AND SURFACE
RESTORATION.
8.REMOVE EROSION CONTROL MEASURES AFTER CITY APPROVAL OF WORK.
SOUTH RENTON TRANSIT CENTER
REMEDIATION PROJECT
XXX
X
X
X
X XXX
X
H
H
H
H
H
RIM=24.47
IE 12" DI NW=21.4
WAT=21.3 BOT=19.8
INLET
RIM=25.25
2.1' X 1.7' CONC
IE 8" CONC N=23.2
IE 4" CONC E=23.3
IE 6" CONC E=23.3
IE 6" X 6" SQUARE CONC W =23.1
WAT=23.2 BOT=22.4
CB
2.2' X 1.9' CONC
RIM=23.81
IE 6" PVC NE=21.2
IE 12" DI NW=20.8
WAT=20.9 BOT=19.2
CB
2.2' X 1.9' CONC
RIM=24.27
IE 12" DI NW=21.1
WAT=21.1 BOT=19.4
INLET
RIM=25.12
INLET
RIM=23.62
CB
2.2' X 1.9' CONC
RIM=25.61
IE 12" DI SW =22.7
WAT=22.7 BOT=21.0
INLET
RIM=25.37
CB
2.1' X 1.9' CONC
RIM=26.61
IE 12" DI SE=22.7
IE 12" DI W=22.7
WAT=22.6 BOT=19.8
INLET
RIM=26.88
CB2.1' X 1.8' CONC
RIM=26.42
IE 12" CPP NW=23.6
WAT=23.2 BOT=21.8
SDMH
48"Ø BRICK
RIM=28.89
IE 30" CONC E=19.9
IE 24" CONC W=19.8
WAT=20.4 BOT=19.5
CB
RIM=26.78
IE 8" DI S=25.5
WAT=25.3 BOT=22.9
CB
RIM=25.90
CB
2.3' X 2.2' CONC
RIM=25.65
IE 6" DI S=24.5
WAT=24.4 BOT=21.3
CB
RIM=27.64
UNABLE TO ACCESS
SDMH
60"Ø CONC
RIM=26.62
12" CPP NE=UNABLE TO SEE
IE 30" CONC NE=19.1
IE 30" CONC W=19.4
WAT=20.4 BOT=18.7
CB1.7' X 2.2' CONC
RIM=25.21
IE 12" CPP SW=23.0
WAT=23.0 BOT=22.6
SDMH
60"Ø CONC
RIM=26.13
IE 12" CPP NE=21.5
IE 27" CONC E=19.7
IE 30" CONC SW=19.2
WAT=20.4 BOT=17.6
CB
2.1' X 1.6' CONC
RIM=25.47
IE 8" CONC N=24.1
IE 12" CPP SW=24.0
WAT=24.0 BOT=23.6
CB
2.1' X 1.8' CONC
RIM=26.15
IE 12" CONC N=20.3
IE 12" UNK S=19.9
WAT=20.6 BOT=18.8
SDMH
RIM=26.16
UNABLE TO OPEN
CB
1.6' X 2.1' CONC
RIM=25.82
IE 4" CONC S=24.1
IE 12" CPP NW=24.1
WAT=23.9 BOT=23.2
CB1.4' X 1.4' CONC
RIM=26.93
N PIPE NOT VISIBLE
IE 6" DI W=26.0
WAT=26.4 BOT=24.5
SDMH
60"Ø CONC
RIM=27.40
IE 27" CONC W=19.8
IE 27" CONC NE=19.4
WAT=19.6 BOT=18.9
SDMH
36"Ø CONC
RIM=25.24
N PIPE NOT VISIBLE
IE 24" CMP E=19.3
IE 27" CONC SW=19.2
WAT=20.6 BOT=19.1
CB
2.2' X 1.9' CONC
RIM=24.95
IE 16" CONC SE=20.9
WAT=21.5 BOT=19.3
CB2.3' X 1.9' CONC
RIM=25.94
IE 12" CONC S=20.5
IE 12" CONC NW=20.3
WAT=20.7 BOT=19.2
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CB
RIM=25.71
CB
RIM=25.53
SHELTER
CANOPYBLDG
BLDG
BLDG
BLDG
CB36" CONCRIM EL=24.29
IE 18" DI N=20.8
IE 8" CPP NE=21.1
IE 12" CPP E=21.2
IE 18" DI SW=20.8
WAT=20.9 BOT=17.8CB2.2' X 1.8' CONC
RIM EL=24.04
IE 18" DI NE=20.7
IE 18" DI SW=20.7
WAT=20.8 BOT=19.3
CB2.2' X 1.8' CONC
RIM EL=23.60
IE 18" DI NE=20.5
IE 12" CPP SE=20.8
IE 18" DI SW=20.6
WAT=20.5 BOT=19.4
CB2.2' X 1.8' CONC
RIM EL=23.39
IE 18" DI NE=20.3
IE 12" CPP E=20.7
IE 18" DI SW=20.4
WAT=20.4 BOT=19.3
INLET
RIM EL=25.09
INLET
RIM EL=25.04
CB60" CONCRIM EL=24.37
IE 24" CPP N=20.7
IE 12" CPP NE=20.5
IE 6" PVC S=21.2
IE 24" CPP S=20.1
WAT=20.4 BOT=18.2
INLET
RIM EL=24.37
NEEDS TRAFFIC CONTROL
INLET60" CONCRIM EL=25.34
IE 24" CPP N=20.1
IE 12" CPP E=20.7
IE 6" PVC S=22.2
IE 24" CPP S=23.0
WAT=20.4 BOT=18.0
INLET
RIM EL=26.78
UNABLE TO OPEN
60" CONCRIM EL=28.35
IE 24" CPP N=19.4
IE 30" CPP NE=19.8
IE 12" CPP S=21.7
IE 36" CPP SW=19.6
BOT=17.8
SDMH48" CONC
RIM EL=28.71
IE 12" DI N=22.6
IE 12" DI S=22.8
WAT=22.6 BOT=20.6
CB1.9' X 2.2' CONC
RIM EL=28.02
TOP OF 12" DI SE=24.3
IE 12" DI N=23.2
WAT=23.3 BOT=22.1
CB1.9' x 2.2' CONC
RIM EL=26.82
IE 12" DI NE=23.7
WAT=23.8 BOT=22.2
INLET
RIM EL=26.93
NEEDS TRAFFIC CONTROL
CB1.7' X 2.2' CONC
RIM EL=26.55
IE 4" CONC W=25.2
WAT=25.2 BOT=24.9
CB1.9' X 2.4 CONC
RIM EL=26.10IE 8" CONC S=24.4
WAT=24.7 BOT=21.8
CB1.9' X 2.4' CONC
RIM EL=25.63
IE 6" DI W/ PLUG W=24.4
WAT=23.9 BOT=20.9
CB1.7' X 2.2' CONCRIM EL=25.70
IE 6" DI SW/ PLUG W=25.0
WAT=24.4 BOT=21.1
CB1.7' X 2.2' CONC
RIM EL=25.18IE 6" PVC S=23.4
IE 6" PVC S=23.3
TOP OF 6" DI W=23.2
WAT=22.7 BOT=21.0
CB2.2' X 1.9' CONC
RIM EL=25.02
IE 12" RCP E=21.8
WAT=21.9 BOT=20.4
CB1.7' X 2.2' CONC
RIM EL=25.80
IE 8" CPP N=22.6
IE 8" CPP SE=22.6
IE 8" CPP SW=22.6
WAT=22.6 BOT=21.1
CB1.9' X 2.2' CONC
RIM EL=24.23
IE 8" CONC E=22.5
IE 8" CPP S=22.6
IE 8" CONC W=22.6
WAT=22.6 BOT=22.6
CB2.2' X 1.9' CONC
RIM EL=24.72
IE 12" RCP N=22.3
IE 12" RCP S=22.2
WAT=22.2 BOT=20.4
CB1.9' X 2.2' CONC
RIM EL=24.68IE 12" RCP NE=21.1
IE 12" RCP W=21.0WAT=21.7 BOT=19.8
CB1.7' X 2.2' CONC
RIM EL=25.92
IE 12" RCP N=21.8
IE 8" CONC E=21.2
IE 12" RCP S=21.6
IE 8" CONC W=22.7
WAT=21.7 BOT=20.8
CB
1.9' X 2.2' CONC
RIM EL=25.33
IE 8" CONC E=23.8
WAT=23.4 BOT=22.8
CBRIM=27.30UNABLE TO ACCESS
SD
CBRIM EL=26.77
8" CONC N=NANEEDS TRAFFIC CONTROL
INLETRIM EL=26.88
NEEDS TRAFFIC CONTROL
SDMHRIM=24.94
NEEDS TRAFFIC CONTROL
SDMHRIM=15.02NEEDS TRAFFIC CONTROL
CBRIM=25.13NEEDS TRAFFIC CONTROLGGFO
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EHARDIE AVE SWXX XXXX XXXXXX X XXXXX1
1
1
1
1
1
3
2
1
1
1
1
1
1
1
1
1
1
1
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1
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4
2
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2
4
4
4
4
4
5
5
5
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2
6
7
INSTALL CATCH BASIN INSERT
PER COR STD DETAIL 216.30.
LEGEND:
LIMITS OF REMEDIATION WORK.
STOCKPILE/STAGING AREA.
1
2
3
APPROX. HOTSPOT EXCAVATION
AREA
APPROX. BIOSTIMULATION
COMPOUND INJECTION AREA
APPROX. EXCAVATION AND
BIOSTIMULATION APPLICATION AREA
LIMITS OF REMEDIATION WORK
SHALL BE FLAGGED WITH HIGH
VISIBILITY FENCING.
INSTALL SILT FENCE ALONG THE
DOWNSLOPE EDGE OF ALL
EXCAVATION AREAS TO CAPTURE
ANY OVERLAND FLOW. SILT FENCE
TO BE INSTALLED PER COR STD
DETAIL 214.00.
4
5
1.HIGH VISIBILITY FENCING SHOWN
OFFSET FROM LIMITS OF
REMEDIATION WORK FOR VISUAL
PURPOSES ONLY.
2.SEE SHEET 1 FOR COR STANDARD
DETAILS.
NOTES:
INSTALL STABILIZED CONSTRUCTION
ENTRANCE PER COR STD DETAIL
215.10. LENGTH SHALL BE REDUCED
TO 30' OR AS REQUIRED BY COR.
6
PLACE STRAW BALES ON PAVEMENT
ALONG DOWNSLOPE EDGE OF
STOCKPILE AREA TO CAPTURE ANY
SILT-LADEN RUNOFF FROM
STOCKPILE AREA.
7
SCALE IN FEET
0 4020 8040
(1" = 40')
TESC PLAN
SOUTH RENTON TC
TESC-P
2
1" = 40'
N
No.DATE DSN CHK APP REVISION
SUBMITTED BY:DATE:REVIEWED BY:DATE:DATE:
CONTRACT No.:
FILENAME:
SCALE:DRAWING No.:
SHEET No.:REV:LINE IS 1" ATFULL SCALEDESIGNED BY:
DRAWN BY:
CHECKED BY:
APPROVED BY:07/06/22 | 2:57 PM | USCU705560C:\BMS\WSP-US-PW-02\D0313689\TESC_REMED_PLAN.DWGTESC_REMED_PLAN FACILITY ID:
PHASE 3 - 30% SUBMITTAL I-405 BRT
AE 0054-17
04/04/2022PRELIMINARY 405
R. GORMAN 04/04/2022RAINIER AVE SSOUTH RENTON TRANSIT CENTER
REMEDIATION PROJECT
PROPERTY
LINES, TYP.
EXISTING ROW, TYP.LAKE AVE SS GRAD
Y
W
A
Y
S GRAD
Y
W
A
Y
STAGING/STOCKPILE
AREA
AE 0054-17 | South Renton Transit Center Remediation Project, Storm Drainage Report
I-405 corridor
City of Renton Wellhead Protection Area Map
72,224 6,019
Wellhead Protection Area Zones Map City of Renton
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.
7/7/2022
Legend
4,09302,046
THIS MAP IS NOT TO BE USED FOR NAVIGATION
Feet
Notes
4,093
WGS_1984_Web_Mercator_Auxiliary_Sphere
Information Technology - GIS
RentonMapSupport@Rentonwa.gov
City and County Labels
City and County Boundary
<all other values>
Renton
Wellhead Protection Area Zones
Zone 1
Zone 1 Modified
Zone 2
Environment Designations
Natural
Shoreline High Intensity
Shoreline Isolated High Intensity
Shoreline Residential
Urban Conservancy
Jurisdictions
Streams (Classified)
<all other values>
Type S Shoreline
Type F Fish
Type Np Non-Fish
Type Ns Non-Fish Seasonal
Unclassified
Not Visited
Wetlands
Streets
Waterbodies
soundtransit.org
brt@soundtransit.org 206-398-5470