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iA <br /> Report Soil and Groundwater Investigation <br /> Cairepa s Car Wash <br /> 6320 Pacific St Stockton CA <br />' lune 12 1998 <br /> Page 8 <br /> in all the groundwater samples collected Gasoline oxygenates/additives, excluding MTBE, were not <br />' detected at or above the laboratory reported detection limits in the groundwater samples collected from <br /> SB-2 <br /> The analytical results for the groundwater samples are presented in Table 3, below Laboratory <br /> certificates of analysis and chain-of-custody forms for the samples are included in Appendix C <br />' TABLE 3 <br /> Groundwater Sample Analytical Results <br />' B T E X TPH-G MTBE Other <br /> Oxygenates/ <br /> Additives <br /> Detection 03 03 03 06 005 1 0 See <br /> Limps lig/l }tg/l }tg/I µg11 mg/1 µgl Laboratory <br /> Sample I D <br /> Analysts <br /> 1707-SBI-45-5/6198 42,000 47 000 3,000 16,000 ND* 77,000 ND* <br /> 1707-SBI-70-5/6/98 26,000 38 000 3 400 17 000 310 20 000 ND* <br /> 1707-SB2-40-5/7/98 38,000 25,000 2 400 17,000 j 410 1,200 NA <br /> 1707-SB2-50-5178 48,000 30,000 1,820 12,000 430 1,000 ND* <br /> 1707-SB2-60-5/6/98 44 000 35,000 2,700 15,000 410 1200 NA <br /> 1707-SB2-70-5/6/98 22 000 24,000 2 600 15,000 260 190 ND <br /> Unit Conversions Analytical <br /> µgll pirts per billion(ppb) li 1 E X=benzene toluene ethyl benzene and x}lcnc <br /> mr,/l parts per million(ppm) TPH G=total petroleum hydrocarbons quantified as�,asolme <br /> MTBE=methyl tertiary butyl ether <br /> Other Oxybenates/Addaives=ethanol Di isopropyl ether Ethyl tertiary Butyl Ether <br /> tart_,r, a.^r,!Uetl•,1 Etre-a.-!•e^t n Butanol <br /> ND—none detected at or above laboratory detection hunts <br /> • Detection limit raised due to the presence of other petroleum hydrocaibon constituents <br /> 4 4 SOIL GAS, GROUNDWATER,AND SOIL SAMPLE COMPARISON <br /> Suii sampieS for 1d001-dtury diidlySIS, bagged sairipleS (for OV1A-r1L Duid bweening) dllu Sufi gds <br /> screening sannples were collected at 30 feet bgs from SB-1 and at 26 and 35 feet bgs from SB-2 <br /> Comparison of the samples collected at 30 feet from SB-1 indicate that there is approximately an order <br /> of inagnitude dilferenue in detectable petroleum hydrac,arbons, between the bagged sample (100 ppm), <br /> and from the soil gas screening sample (1,050 ppm) for a soil sample containing 1 2 ppm TPH-G A <br /> Similar comparison could not be made on the samples colIeLted at 26 and 35 f"t bgs from SB-2 because <br /> the soil gas screening Samples were over the range of the OVA-PID (2,000 ppm) in both Samples <br /> �� CONDOR <br />