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oil tank sample was also analyzed for total petroleum hydrocarbons as diesel fuel TPHd using <br /> EPA Method 8015 (modified), for total oil and grease (TOG) using EPA Method 418 1, for <br /> volatile and semi-volatile organic compounds using EPA Method 8240 and 8270, and for the <br /> ' metals Cd, Cr, Pb, Zn, and Ni <br /> Laboratory results indicate that TPHg and BTEX (excluding benzene) is present In slightly <br /> elevated concentrations at both sample locations and in stockpiled soil (Table 1) TOG was not <br /> detected beneath the waste oil tank, however, the sample collected from beneath the waste oil <br /> ' delivery line contained 670 ppm TOG TPHg, BTEX, volatile and semi-volatile organic <br /> compounds, and CaM 5 Metals (Cd, Cr, Ni, Pb, and Zn) were not detected in the soil sample <br /> collected from beneath the waste oil line TPHd was detected at 10 ppm to this sample, however <br /> 1 the laboratory characterized this result as an overlap with the hydrocarbon range for TOG EDB <br /> and soluble lead were not detected in the tank removal soil sample (S-13-3N) The soluble <br /> threshold limit concentration (STLC) for lead Is 5 0 ppm Sample locations are depicted in the <br /> ' Tank Sample Location Map (Figure 1) and the Stockpile Sample Location Map (Figure 2) <br /> ' TABLE 1 <br /> LABORATORY RESULTS OF SOIL SAMPLES <br /> TANK REMOVAL AND STOCKPILE <br /> 1766 MONTE DIABLO <br /> STOCKTON, CALIFORNIA <br /> Sample TPHg Benzene Toluene Ethyl- Total WET <br /> Number benzene Xylenes Lead <br /> ' Tank Removal <br /> S-13-3N 70 <0 125 4 17 74 <0 0S <br /> S-14-2S <0 5 <0 005 0 077 <0 005 0 054 NA <br /> Stockpile <br /> S-SP 1-A,B,C 32 <0 125 <0 125 <0 125 19 NA <br /> S-SP2-A,B,C 23 <0 005 <0 005 <0 005 3 2 NA <br /> S-SP3-A,B,C 4 5 <0 005 <0 005 <0 005 <0 015 NA <br /> S-SP4-A,B,C 37 <0 005 <0 005 099 11 NA <br /> 1 S-SP5-A,B,C <0 5 <0 005 <0 005 <0 005 <0 015 NA <br /> Laboratory analyses performed by Matrix Environmental Laboratories <br /> Laboratory results reported in mg/kg (parts per million) <br /> TPHg = Total Petroleum Hydrocarbons as gasoline <br /> TPHd = Total Petroleum Hydrocarbons as diesel fuel <br /> NA = Not Analyzed <br /> < = Less than the laboratory method detection limits <br /> 1580-0101tr <br /> A%. <br /> 2 <br /> & Associates, Inc <br /> Environmental scienuscs and Engineers <br />