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TABLE 2-Continued <br /> GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> Concentrations in rrucrograms per liter (kg/L) <br /> Exxon Retail Station No 7-3708 <br /> 2705 Country Club Boulevard <br /> Stockton, California <br /> Monitoring Ethyl- Total TPH° as <br /> Well Date Benzene Toluene benzene Xylenes gasoline <br /> MW-8 05/31/94 <0 5 <05 <05 <0 5 <50 <br /> 08/30/94 <0 5 <0 5 <0 5 <05 <50 <br /> 11/22/94 <05 <0 5 <0 5 <0 5 <50 <br /> Total petroleum hydrocarbons <br /> b Atypical chromatogram with unidentified peak(s) within the range of gasolme hydrocarbons Chlorinated <br /> hydrocarbons are suspected A ground water sample collected from monitoring well MW-6 on <br /> April 17, 1992, contained chlorobenzene and 1,2-dichlorobenzene <br /> Atypical chromatogram Analysis of this sample by EPA Method 624 on April 17, 1992 (past EPA <br /> recommended holding time),was positive for the tollowing chlorinated hydrocarbons vinylehlonde, cis-1,2- <br /> dichloroethene, trichloroethene and tetrachlorethene These peaks resulted in a positive fuel hydrocarbon <br /> result <br /> a Atypical chromatogram Four unknown peaks were observed causing a positive tuel hydrocarbon result <br /> Chlorinated hydrocarbons are suspected <br /> Atypical chromatogram An unknown peak was observed between MT13E and benzene Chlorinated <br /> . hydrocarbons are suspected <br /> r Atypical chromatogram Analysis of this sample by EPA Method 624 on April 17, 1992 (past EPA <br /> recommended holduig time)was positive for the tollowing chlorinated hydrocarbons chlorobenzene and 1,2- <br /> dichlorobenzene <br /> Result is an estimated value because it exceeds the linear range <br /> i <br /> t.RP523 TA <br />