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i <br /> TABLE 2 <br /> ANALYTICAL RESULTS OF WATER SAMPLES <br /> Pacific Gas <br /> 2088 Mariposa Road, Stockton, CA <br /> OWL) <br /> 1 Sample TPH as TPH as Ethyl- <br /> ID Gasoline Diesel Benzene Toluene benzene Xylene <br /> ' MW-1/11-10-93 ND 260 ND 199 ND ND <br /> MW-1/5-27-94 ND 90 ND ND ND ND <br /> ' MW-1/9-26-94 ND 290 ND ND ND ND <br /> MW-1/12-8-94 ND 420 ND ND ND ND <br /> ' MW-2/11-10-93 ND 390 ND ND ND ND <br /> MW2/5-27-94 ND 100 ND ND ND ND <br /> MW-2/9-26-94 ND 170 ND ND ND ND <br /> ' MW-2/12-8-94 67 ND 1.3 ND ND ND <br /> MW-3/11-10-93 53 140 ND 24 ND ND <br /> ' MW-3/5-27-94 ND 110 ND ND ND ND <br /> MW-3/9-26-94 63 400 ND ND ND ND <br /> MW-3/12-8-94 ND 480 058 ND ND ND <br /> pv = billion tPY 7 <br /> AD Not I�ot Detected <br /> 5.0 CONCLUSIONS & RECOMMENDATIONS <br /> ' 5.1 Hydrocarbon Impacted Groundwater <br /> Y P <br /> ' Concentrations of TPH as diesel in MW-1 and MW-3 increased between September and <br /> December 1994 However, no diesel was detected in MW-2, indicating a decrease between <br /> ' September and December 1994 <br /> i <br /> TPH as gasoline and benzene were detected for the first time in MW-2, benzene was also <br /> ' detected for the first time in MW-3 <br /> Very low concentrations of petroleum hydrocarbons continue to be detected in each well <br /> ' at the site Therefore, additional monitoring wells should be installed <br /> Initially, installation of additional monitoring wells at the site was delayed because USA <br /> ' Gasoline, located southeast of the site, was preparing to install additional monitoring wells <br /> near the Pacific Gas site Information obtained from these wells may have been useful in <br /> determining placement of wells at Pacific Gas <br /> Ce Jl&_E Ada 5.rv�I-- <br /> N.r c w QR4112 94ffin S <br />