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COLUMBIA ANALYTICAL SERVICES,INC <br /> Analvttcal Report <br /> SClient ARCO llioduul,Connpcl1ny Service Request: S970o570 <br /> Project 21775-229 000]O#19350 00/21 10STOCKTON Date Collected: 3/25197 <br /> Sample Mitt tr W,,tLr Date Received: 3128/97 <br /> BTEX MTBE and TPH as Gasoline <br /> Sample Name MW-5(75) Units ug/L(ppb) <br /> Lab Code 59700570-005 Basis NA <br /> Test Notes <br /> PI ell Analvsi% Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> TPH as Gasoline NOMI: CA/LUITT 50 1 NA 4/5/97 <200 G2 <br /> Benzene NONE 8020 05 1 NA 415/97 3 2 <br /> Toluene NONE 8020 05 I NA 4/5/97 ND <br /> Ethylbenzene NONE 8020 0 5 I NA 4/5/97 1 6 <br /> Xylenes,Total NONE 8020 05 I NA 4/5/97 3 0 <br /> Methyl telt-Butvl Ltliur NONE 8020 3 L NA 4/5/97 <8 Ml <br /> I <br /> I <br /> I <br /> I <br /> G2 The sample contained non-Eitel components eluting in the gasoline range, and quantitated as <br /> gasolinic The chromatogram did not thatch the tvpical gasoline fingerprint <br /> M l The MRL inns elevated because of matrix interferences <br /> 11%22/020597p <br /> 4700570 XLS Lblewi 1v 1 11 Page 7 <br /> Pane No <br />