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4 2 5 Soil Disposal/$ilr, Re, tQration ' Approximately 3,100 tons of non-hazardous soil was transported from the biotreatment cell to BFI Landfill, a Class II landfill in Livermore, California on November 28 to December 1, 1990 Copies ' of all bills of lading available upon request and one copy is attached as Appendix L Excess hay bails geotextile fabric and the HDPE liner was also disposed at the same facility The biotreatment cell area ' was then swept clean and any damage to the asphalt was patched 4 3 FORMER PUMP ISLAND 1 Section 2 4 discussed the 10,000 gallon diesel UST removal which occurred under the supervision of San Joaquin County personnel in 1988 During the scoping of the Soil Remediation and Groundwater Monitoring Workplans, it was assumed that the underground product line had been removed along with the 10,000 gallon UST When PHS-EHD contacted American Moulding and Millworks in January 1991, ' AFPC authorized Dames & Moore to prepare a workplan to remove the piping under the supervision of PHS-EHD A workplan was prepared and the "Application to Close Underground Storage Tank Containing Hazardous Materials" was completed and submitted to PHS-EHD, and RWQCB on April 12, 1991 and field work began on June 18, 1991 4 3 1 Site Clearing ' Preconstruction activities included location and clearance of underground and overhead lines, and setup of chain-link fencing for site security Environmental Geotechnical Consultants(EGC)of Stockton, ' California,performed the excavation, decontamination of the underground pipe, removal of impacted soil, backfilling and site restoration The application specified the contents of the Health and Safety Plan, as well as the decontamination and disposal technique for all piping and product lines All piping was triple rinsed and ' the rinsate generated from the product line was collected in a 55 gallon drum, manifested as a uniform hazardous waste and was disposed of by Chico Drain Oil Service in Chico, California ' After a tailgate Health and Safety Meeting with the subcontractor, Environmental Geotechnical Consultants (EGC) of Sacramento California, the asphalt and concrete from the pump island and above ' the product line was removed and disposed at a Class III Landfill Demolition of the pump island began on June 18, 1991, to allow PHS-EHD representative to inspect pipe on June 20, 1991 b The asphalt extended approximately 6 inches and was underlainy approximately 4 to 6 inches of oily gravel presumed to be roadbase. At approximately one foot bgs the native material, a dark, SAC36 046 20