Remedial Design and Remedial Action Work Plan Remedial Design ...

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Draft RD/RAWP Remedial Action at IR Site 25 Former NAS Moffett Field Moffett Field, California 4.2.1 Diversion of WATS Water Diverting WATS effluent (approximately 50 gpm) away y from the SWSB will be conducted prior to formal construction activities. The WATS effluent water is routinely sampled for volatile organic compounds (VOCs) and other constituents and iss typically devoid of contamination. The diversion will entail intercepting the WATS effluentt conveyancee pipe near where it connects to SWSB and directing the water into a temporary tank. From the temporary tank, water will be directed through temporary pipes or fire hoses to an existing catch basin east of Zook Road and west of the Moffett Field flight line. The catch basin will convey the water by gravity eastward under the flight line to join the NASA ARC storm drainage system, eventually ending up in the Northern Channel. From the Northern Channel, water iss pumped into the Sunnyvale West Flood Control Channel (NASA ARC, 2010). This activity willl be covered under the existing VOC permit for WATS discharge issued by the Water Board to the Navy dated 17 November 2009 (Water Board, 2009) . 4.2.2 Pumpage from SWRP to Alviso Pond A2E In typical years, SWRP is generally dry by August-Septe ember, due to evapotranspiration of water that accumulates during winter months. However, , due to significant rainfall received at Moffett Field during the 2010-2011 rainy season, the SWRP was nearly full as of late March 2011, and pumpage may be necessary to dry out the SWRP sufficiently to allow the sediment removal activity to proceed. The estimated volume of water to be pumped is 60, ,000,000 gallons, or about 180 acre-feet (AF). Pumpage from SWRP to Alviso Pond A2E ( formerly Cargill Pond A2E) appears to be feasible. Alviso Pond A2E is one of five ponds in the area that aree part of the San Francisco Bay National Wildlife Refuge administered by USFWS. The five-pond system covers a footprint of about 1,000 acres, so the addition of 180 AF of SWRP water will not physically impact the Alviso Pond system. Sampling and testing of pumped water will be conducted to ensure that COCs from IR Site 25 are not released into the Alviso Ponds. 17
Draft RD/RAWP Remedial Action at IR Site 25 Former NAS Moffett Field Moffett Field, California Details of this activity, including permitting, sampling frequency, etc., a water diversion plan will be submitted as an appendix to the draft final versionn of the RD/ /RAWP. 4.3 PROFILING SEDIMENT FOR WASTE DISPOSAL Before excavation activities begin, ITSI will coordinate with waste disposal companies to profile (characterize) the sediments to be excavated for disposal. Previous results of chemistry testing of the sediments willl be considered for possible use in the characterization effort. It is likely that some additional sampling of sediment will be necessary, and that the disposal facilities will require leaching testss to be conducted in certified analytical laboratories. Possible tests include the Toxicity Characteristic Leaching Procedure (TCLP) and the Waste Extraction Test (WET), as described in the California Code of Regulations (CCR) Title 22. The sampling frequency and list of analytes will be coordinated with the disposal facilities. Any sampling activities will be coordinated with the ROICC at Moffett Field. 4.4 PRE-CONSTRUCTION PHOTO SURVEY A pre-construction photo survey of the existing infrastructure at the project site, including NASA ARC buildings, fences, pavements, walkways, etc., and Bay Trail levee roads and appurtenances, will be conducted so that possible impacts related to RA activities can be assessed and that appropriate repairs can be made at the end of the project. . This effortt will be coordinated with NASA ARC. 4.5 PERMITS AND NOTIFICATIONS Site operations will be performed in coordination with the Navy Remedial Project Manager (RPM), the Navy ROICC, and NASA ARC representativ ves. The following permits are anticipated for the project: • • A NASAA construction permit will be acquired. A Planning Clearance Application will be completed and submitted to NASA ARC throughh the Navy ROICC. The application will include requests for a construction permit, excavation permit, and safety clearance permit, and will include thiss RD/RAWP. The application requires review and approval by the ARC permit planning board. Field construction work will not begin until the required permitting action is approved and a signed work permit is issued by the NASA ARC Chief Building Official. If any hot work (welding, cutting, etc.) is required, a hot work permit will be coordinated with the NASA ARC Safety Group. 18
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Draft Quality Control Plan Remedial
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QCP ATTACHMENT 1 DESIGNATION LETTER
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AND LOCATION T R A N S M I T T A L
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Project-Specific SAP for the Remedi
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References California Department of
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SAP ATTACHMENT 1 SAMPLE FIELD FORMS
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2730 Shadelands Drive, Suite 100 Wa
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Sheet ____ of ____ Low-Flow Groundw
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2730 Shadelands Drive, Suite 100 Wa
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SAP ATTACHMENT 2 SAMPLE QUALITY CON
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Sheet _____ of _____ NON ROUTINE OC
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Standard Operating Procedure Shallo
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Standard Operating Procedure Sample
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Attachment A Sample Preservation an
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Attachment A Sample Preservation an
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Standard Operating Procedure Field
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Event Location ID Sample Type Field
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SAP ATTACHMENT 5 RWQCB Screening fo
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Table B. Environmental Screening Le
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Table B. Environmental Screening Le
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ID Task Name Duration Start Finish
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TABLE OF CONTENTS TABLE OF CONTENTS
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EXECUTIVE SUMMARY This Biological A
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Figure 1. Project Action Area with
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sampling. The qualified biologist w
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experienced botanist will inspect a
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Aerial image is a 8/21/2009 image f
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Habitat Photo 1. Pickleweed/Saltgra
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Habitatt Photo 4. Eastern Diked Mar
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Table 1 Continued Scientific Name C
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Table 2. Federally‐listed Fish fr
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Table 3. Federally‐listed Birds f
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Table 4. Federally‐listed Mammals
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icarioides missionensis). Appropria
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Table 6. Special‐status Plants fr
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Figure 10. Critical habitats design
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No federally-listed invertebrate sp
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Acronyms and Abbreviations CDFG CEQ
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References Barbour M.G., T. Keeler-
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USFWS. 2010a. U.S. Fish and Wildlif
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Appendix D. Species List for Milpit
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Scientific Name Common Name Family
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Scientific Name Common Name Family
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Table 1. Special‐status Amphibian
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Table 2. Special‐status Fish from
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Table 3. Special‐status Birds fro
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Table 3. Continued. Scientific Name
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Table 4. Special‐status Mammals f
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Table 5. Special‐status Invertebr
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Table 6. Special‐status Plants fr
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Table 6. Continued Scientific Name
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