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1 ' The six samples taken at the Scotts Avenue locality were analyzed by the following methods at the direction of Mr. William R. Snavely, R.S., San Joaquin Local Health District: Total Petroleum Hydrocarbons (TPH) by EPA method 8015; ' Benzene, Toluene, Xylene (BTX) by EPA method 8020 Halogenated Volatile Organics (HVO) by EPA method 8010; PCB by EPA method 8080. ' The laboratory analyses show that all soil samples are below ' detection limits for BTX (0.05 mg/kg). HVO analyses show that all soil sample are below detection limits (0.05 mg/kg). The laboratory analyses for PCB's also show that all soil samples are below ' detection limits (1 mg/kg). Copies of the laboratory analyses reports are provided in Appendix C. The TPH laboratory analysis (diesel) on the six soil samples show that five of the samples have concentrations above detection ' limits (see Appendix C). These results are listed below: ' Sample Tank # Concentration S-01 -01 Tank Vault #1 , south-end no detection S-02-01 Tank Vault #1 , north-end 35 mg/kg (ppm) ' S-03-01 Tank #2, center 4900 mg/kg (ppm) S-04-01 Tank #3, south-end 6900 mg/kg (ppm) S-05-01 Tank #3, north-end 4100 mg/kg (ppm) ' S-06-01 Tank #4, center 6100 mg/kg (ppm) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5.0 DISCUSSION and CONCLUSIONS ' Analyses of the soil samples taken from below the underground steel tanks show evidence of diesel/bunker fuel contamination. The appearance of product concentrations in the the soils was only detected by EPA 8015 method. This analytical method is most ' specific for the detection of heavy hydrocarbons such as diesel, bunker fuel, and waste oils. There is no evidence of benzene, ' toluene, xylene (BTX), chlorinated solvents, or PCB components residing in the soils beneath the UST's. These latter components are usually associated with other types of product such as gasolines, t7