SITE INFORMATION AND CORRESPONDENCE

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2652(c) (4) see attached unauthorized release report (5) see attached unauthorized release report (6) see attached unauthorized release report. All UST's and associated piping were removed on September 27, 1995 and transported under hazardous waste manifest to Richmond, California where each were properly destroyed by Erickson,Incorporated. (7) Corrective action taken to date includes the excavation and disposal of hydrocarbon- impacted soil from the bottom of the north end of the former UST pit and from beneath soil samples T2-N-16.0 and T3-N-15.0. These samples were collected by Touchstone Developments on September 27, 1995.The excavation of soil in these areas occurred on October 2, 1995.The total extent of the excavation was approximately a 20 ft.x 20 ft. area that extended down to approximately 17 feet below grade. No confirmatory soil samples were collected from the bottom of this excavation. Approximately forty cubic yards of soil were generated during this excavation and were disposed of at BFI Landfill in Livermore,CA. On October 4, 1995 additional excavation of hydrocarbon-impacted soil was performed at and below the location of Touchstone Development's dispenser sample D-5.The final excavation was 9.0 ft. x 9.0 ft. x 7.0 ft. deep. Soil samples DX-N-7.0,DX-W-7.0,DX-S-7.0, DX-E-7.0,and DX-B-8.0 were collected by Touchstone to confirm the effectiveness of this contamination removal. Approximately twenty seven cubic yards of soil were generated by this work and were disposed of at BFI Landfill. A final report documenting all UST removal activities,excavations, soil stockpile characterization,and disposal will be submitted to San Joaquin County Public Health Services on,or before,November 10, 1995. Future site investigation will include soil borings to define the vertical and lateral extent of hydrocarbons in soil that have been documented onsite to date. The soil boring investigation will also attempt to define the completeness of excavation that was performed on October 2, 1995 beneath the former UST pit.The investigation will also include the drilling and installation of groundwater monitoring wells to determine the extent of hydrocarbon impact to groundwater beneath the site. (8) The method of cleanup implemented to date has been limited to the excavation of hydrocarbon impacted soil that was associated with the former UST pit and the former dispenser area. Further cleanup activities will be determined upon review of future site investigation results. Once the need for further cleanup has been determined,a proposal describing the recommended procedure will be submitted to San Joaquin County Public Health Services. The workplan describing site investigation activities will be submitted to San Joaquin County Public Health Services on,or before,November 10, 1995. A report describing the findings of this investigation will be submitted within forty five days upon completion of all associated field work. Upon review of this report,a workplan for further investigation or a plan for corrective action will be submitted within ninety days. (9) A total of approximately three hundred and fifteen cubic yards of soil were stockpiled at the subject site. These soils were generated during the removal of all UST's and piping and during the subsequent excavations beneath the former UST pit and dispenser. All stockpiled soil was sampled by Touchstone Developments according to those protocol established by BFI Landfill to meet their acceptance criteria. Once approval was received,all soils stockpiled onsite were transported to BFI Landfill on October 16, 1995. Copies of all manifests available to date are attached.