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Mr Kyle Christie Project 0805-140 03 . July 23, 1996 Page S « Overexcavation of soil beneath the gasoline USTs will not be performed Residual hydrocarbons impacting soil beneath the former USTs and backfill material will be remediated in the future using vapor extraction technology Stockpiled Soil Sampling • Soil generated during the removal of the gasoline USTs and product delivery lines will be segregated from the soil generated during the removal of the waste-oil tank Soils generated from the waste-oil tank excavation will be stored on site and placed on and covered with visqueen • One composite sample (four discrete samples) will be collected from every 1 100 cubic yards of soil generated from the former gasoline USTs The samples will be composited by the laboratory and will be analyzed for TPHG and BTEX Ci using the methods discussed above • One composite sample will be collected from every 100 cubic yards of soil generated from the waste-oil tank excavation The samples will be composited by the laboratory and will be analyzed for TPHG, BTEX, TOG, TPHD, CLHC, PCBs, PNA, cadmium, chromium, lead, nickel, and zinc using the methods discussed above Backfillinv Activities • Soil generated from the former gasoline UST cavity and product dispenser island will be used as backfill of the gasoline UST cavity If warranted, EMCON will obtain the necessary permits from the CRWQCB, Central Valley Region, to discharge waste to land Backfilling, using soil generated from the former gasoline UST excavation cavity and dispenser islands, was approved by Mary Meays of SJCPHS on January 30, 1996 • The general contractor will import clean soil to backfill the former waste oil tank excavation and the remaining portion of the gasoline UST cavity and product lines • The general contractor will obtain any necessary permits regarding the compaction and grading of the excavations sACNN\,PJM805\4Ro5ia00 3US-95 nes i