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May I, 1998 Page 3 backhoe, to assess the vertical extent of hydrocarbon impact y p The extent of the final ' excavation measured approximately 8 feet by I 1 feet and 12 feet deep Photo-ionization detector measurements were collected from excavated soils and indicated maximum readings of approximately 300 parts per mullion (ppm) in soil A soil sample, PD-4@12' ' which was collected from the base of the excavation, exhibited hydrocarbon odor The soil removed from the excavation was segregated from other stockpiles and the two ' samples collected, PD-4 and PD-4@12', were used for disposal profiling Following the removal of the product piping, soil samples designated PP-1 to PP-6 were ' collected from beneath the location of the piping Each of these soil samples were collected at a depth of 5 feet bas Sample locations are shown on Figure 2 The product piping areas did not exhibit field evidence of petroleum hydrocarbon impact ' Soil Stockpiles ' On February 9, 1998, most of the soil excavated from the UST area was transported by Den Beste Trucking directly to Forward Landfill, a state-licensed facility located in Manteca, California, and temporarily stockpiled at that facility pending profile analysis I Soil analytical results from the UST area confirmation samples were accepted for profiling On February 4, 1998, PEG collected composite samples from two additional stockpiles, designated SP-1 and SP-2, which were generated from the UST excavation Stockpile SP-I consisted of approximately 100 cubic yards of pea gravel and was segregated for reuse Additional analyses were performed on the composite sample collected from SP-1 as directed by Harlin Knoll Based on the analytical results, Stockpile SP-I was reused as backfill material for the UST excavation Stockpile SP-2 consisted of mostly pea gravel and was transported to Forward Landfill A total of ' approximately 1,300 tons (an estimated 600 cubic yards) of soil from the UST area were disposed at Forward Landfill On February 24, 1998, PEG collected composite samples from two stockpiles, desig- nated SP-1 and SP-2, generated from the product dispensers and piping trenches On March 2, 1998, both stockpiles, totaling approximately 218 tons (an estimated 200 cubic yards) of soil, were transported by Den Beste Trucking, to Forward Landfill Soil Analysis ' As requested by the SJCPHS representatives, the soil samples were analyzed for the following parameters The diesel UST soil samples were analyzed for total extractable petroleum hydrocarbons calculated as diesel (TEPH-d) by EPA Method 8015 (modified), benzene, toluene, ethylbenzene, and total . xylenes (BTEX compounds), and methyl tert-butyl ether (MtBE) by 3111791 AISOILREP I