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COLUMBIA ANALYTICAL SERVICES,INC <br /> Analytical Report <br /> Client ARCO Products Company <br /> Project Service Request, S9700986 <br /> � 21775-20G 003+TOk21333 00/548 STOCKTON <br /> Sample M.itrir Water Date Collected: 5127197 <br /> Date Received: 5/28/97 <br /> BTEX,MTBE and TPH as Gasoline <br /> Sample Name MW-3(62) <br /> Lab Code Units ug/L(ppb) <br /> s97oays6-oo3 <br /> Test Notes Basis NA <br /> Prep Analysis Dilwhon Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> TPh1 as Gasolene EPA 5030 CA/LUFT 50 1 NA 6/5/97 <70 <br /> Benzene EPA 5030 8020 G20 5 1 NA 6/5/97 ND <br /> Toluene EPA 5030 8020 05 1 NA 6/5/97 ND <br /> Ethylbenzene EPA 5030 8020 05 1 NA 6/5/97 ND <br /> Xylenes,Total EPA 5030 8020 05 1 NA 615/97 ND <br /> Methyl tent-Butvl Ether EPA 5030 8020 3 1 NA 6/5/97 ND <br /> G2 Ratsed MRL clue to matrix interference The sample contains a single non-fuel component eluting <br /> in the gasoline range Tlie chromatogram does not match the typical gasoline fingerprint <br /> IS221020597p <br /> Page 5 <br />