ARCHIVED REPORTS_REMEDIAL ACTION REPORT

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Tracy Pump Station Remedial Action Report January 4,2012 Certified Asbestos Consultant from URS Corporation(URS)to sample the material on October 25, 2011. The analytical results for the asbestos samples indicated that some of the debris materials in the soil contained asbestos, and would therefore require special handling— procedures. URS prepared a report on the asbestos sampling activities dated October 27, 2011. The Limited Asbestos Survey Summary Report and related documentation are included as Appendix G. SAIC requested URS oversee asbestos abatement activities performed by American Integrated Services, Inc (AIS), a licensed asbestos abatement contractor. AIS performed the following tasks= • Submitted an Asbestos Notification Form to San Joaquin Valley Unified Air Pollution Control District, and received a waiver from the 10 day waiting period for start of ' asbestos abatement; • Directed Integrated Waste Management, Inc(IWM)to line roll-off bins with two layers of 6-milliliter poly sheeting and properly label the roll-off bins once they had been filled; • Constructed and maintained an exclusion zone around the excavation area; • Utilized wet methods to control dust/asbestos during excavation activities; and • Covered the excavated material with 6-milliliter poly sheeting once each bin had been filled. Refer to Appendix C for more information regarding the field and sampling methods and Appendix E for backfill source information and compaction testing results. Photographs of the field activities are included as Appendix H. 3.4 INVESTIGATION-DERIVED WASTE Soil cuttings and decontamination water generated during the pre-excavation investigation activities were stored in properly labeled U.S. Department of Transportation-rated, 55 gallon steel drums. Two drums of soil cuttings and two drums of decontamination water were stored on site until 21"Century Environmental Management of California,LP picked them up for ' transportation to the landfill on July 12, 2011. The drums were delivered to Altamont Landfill and Resource Recovery Facility in Livermore(Altamont Landfill)on July 18,2011. RECON directly loaded affected soil into 18-cubic-yard trucks contracted to CRA from October 21 through November 2, 2011_ Site debris (wood boards, metal debris, and piping)encountered within the excavation area were segregated from the soil, placed in a roll-off bin, and disposed of separately from the hydrocarbon-affected soil. A total of 185 truckloads of hydrocarbon-affected soil, with a total weight of 3,685.3 tons, and one roll-off bin with 1.83 tons of non-regulated debris,were transported under a non-hazardous waste manifest to Altamont Landfill. Signed waste manifests and scale tickets from Altamont Landfill are included as a component of Appendix E_ AIS supervised as RECON loaded the asbestos affected soil and debris into a total of 18 roll-off bins, with a total weight of 157.5 tons. CRA coordinated transportation of the roll-off bins from ' the Site to Clean Harbors Buttonwillow LLC (Buttonwillow), in Buttonwillow, California. URS collected one additional composite sample for waste profiling for the affected soil and debris in the roll-off bins_ Signed waste manifests and scale tickets from Buttonwillow are included as a component of Appendix E. 5 SAIC I