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A f Report-Soil and Groundwater Investigation Pacific 91 S s Car Wash 6320 PactFiSs tocl.torG CA ' June 12 1998 Page-6- elevated detection level in the 70-foot sample Gasoline oxygenates/additives, excluding MTBE, were not detected at or above the laboratory reported detection limits In soil samples collected from SB-1 Soil samples were collected at 15, 20,26, 30, 35, 40, and 70 feet bgs from SB-2 The laboratory analyses Indicated soil sample collected from vadose zone in SB-2 had Increasing levels of BTEX, from 26 feet to the water table, except for the sample collected from 30 feet Fhe samples collected from 15 and 20 feet Indicated that BTEX, MTBE, and T IH-G were not detected at or above the laboratory reported detection limas Toluene Increased from 10 µg/kg to 16,000 lig/kg, and total xylenes ranged from 18 µg/kg to 50,000µg/kg, in the samples collected from between 26 and 40 feet bgs MTBE was only detected in the sample collected from 40 feet The MTBE laboratory analysis of samples collected at 30 and 35 feet from SB-2 were not detected due to elevated detection limits from other petroleum hydrocarbon The results of analysis of the soil sample collected at 70 feet, the only soil sample collected below the water table, indicate only very low levels of benzene, toluene, and xylene Gasoline oxygenates/additives, excluding MTBE, were not detected at or above the laboratory reported detection limits in soil samples from SB-2 The results of analysis of soil samples are presented in Table 2, on the following page The first set of numbers in the sample identification number in Table 2 represents Condor's project number, the second is the boring number, and the last represents the depth at which the sample was collected Laboratory certificates of analysis and the chain-of-custody forms for the samples are Included in Appendix C �� CONDOR