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01/23/04 FRI-13:39 FAX 916 6792900 URS � Q005 <br /> Mr, Paul Supple Project 797613 <br /> January 27,2000 <br /> Page 3 <br /> verification Soil Sample Results <br /> Table 1 presents a summary of the verification soil sample analytical results. TPHG was . <br /> detected in six of the ten soil samples at concentrations ranging from 1.3 milligrams per <br /> kilogram (mg/kg) (PL-5) to 6700 mg/kg (D-1). MTBE was detected in two of the ten <br /> samples at concentrations of 0.930 mg/kg (PL-2) and 1.71 mg/kg (D-4). Benzene was <br /> not detected in'any of the ten soil samples. <br /> Over Excavation Soil Sample Results <br /> Table 2 presents a summary of the over excavation soil sample analytical results. TPHG <br /> was detected in two of the five sail samples at concentrations of 3300 mg/kg (ND ) <br /> 9800 mg/kg (SD4). MTBE was detected. in one of the five soil samples at a <br /> concentration of 0.41 mg/kg., Benzene was not detected in any of the five soil samples. <br /> Soil Stockpile Sample Results <br /> Table 3 presents a summary of the soil stockpile analytical results. TPHG was detected <br /> in soil stockpile (SP1M) at a concentration of 99 mg/kg. Stockpile SP-1, generated <br /> during overexcavation,' contained TPHG at 240 mg/kg. Lead was detected at <br /> concentrations of 22 mg/kg(SPIM and SP-1)and 25 mg/kg(SPC 1,2,3,4). <br /> CONCLUSIONS <br /> Six of the ten verification soil samples contained detectable concentrations of TPHG and <br /> BTEX. MTBE was detected in two.samples at concentrations of 1.71 and 4.930 mglkg. <br /> Two of the five overexcavation samples contained TPHG, toluene, and ethylbenzene. <br /> Total xylenes were.detected in all five samples. MTBE was detected in one sample at 1 <br /> 0.41 mg/kg. <br /> Approximately 47 yards of excavated soil was transported for disposal to BFI/Vasco in <br /> Livermore, California, and approximately 50 yards of hydrocarbon impacted soil was <br /> transported for disposal to TPS Technologies in Richmond, California. <br /> IT Corporation ' <br /> CRC-vAmhivew woMeports\60saP9ol.ixx-9s iS91 01/27ro0 <br />