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 irrigation will not be needed at the site. The botanist will inspect and make a written and photographic record of the final condition of each area. 6.5.1 General Fill Material Imported fill may be placed to restore excavated areas if f deemed necessary by the botanist. Areas that are typically inundatedd will not be backfilled; rather, natural sedimentation processes will be allowed to occur. Prior to use, samples of planned fill materials will be collected and submitted to a geotechnical laboratory for physical testing; the intentt is to match as closely as possible the physical characteristics of the existing sediment, as described in the recent pre- design report (KCH, 2011). Samples of import will also be submitted to an analyticall laboratory for chemistry testing, as describedd in the SAP (Appendix B). Sampling frequencyy will conform to the information advisory on imported fill published by the State of California Department of Toxic Substances Control (DTSC). The analyte list for testing will includee the COECss for IR Site 25, plus the list of analytes in the DTSC advisory. Acceptance criteria are discussedd in the SAP. 6.5.2 Aggregate Base If existing roadways need repair, aggregate base (AB) may be placed under the re-constructed roadways. AB will be placed in 8-inch maximum lifts. Compaction will meet 95 percent maximumm dry density. 6.5.3 Compaction Testing Compaction testing is described in the QCP (Appendix A). 6.6 DECONTAMINATION OF EQUIPMENT All equipment and vehicles that come into contact with contaminated sediment, liquids, and/ /or infrastructure will be decontaminated in controlled and contained areas before demobilization. Dry brushing or wiping or both will be the primary decontamination methods used (to minimize the volume of rinsate water requiring treatment or disposal). If necessary during periods of rainfall or when significant contamination is present, equipment and vehicles (especially tires) will be washed with a pressure washer over a bermed, lined area. WATS water will be used if 27
Draft RD/RAWP Remedial Action at IR Site 25 Former NAS Moffett Field Moffett Field, California feasible. Decontamination will proceed until all sediment and residues are removed. Waste liquids will be contained and disposed of properly. 6.7 INSPECTIONS Inspections to be conducted during the site remediation of IR Site 25 are described in the QCP (Appendix A). 6.8 DEMOBILIZATION ITSI willl demobilize earthwork equipment and personnel as activities are completed. Upon completion of all site activities, the ITSI field representative will inspect the equipment storage area and sediment laydown areas, to verify that all project-related equipment, trash, and debris have been collected and properly disposed. Demobilization will also include the disposition of government-owned property, if any; removal of equipment, tools, and supplies; removal of temporary fencing, traffic control devices, signs, storage containers, portable toilets, and refuse containers. A final site inspectionn will be held by the Navy, ITSI, and other stakeholders (NASA ARC, MROSD) as may be required. 28
Page 1 and 2: Draft Remedial Design and Remedial
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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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