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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> . Client ARCO E'ioduLtti C.antpany <br /> Prolei,t 21775-229 00VTO 21333 00/2130 STOCKTON Service Request" S9700958 <br /> Sample Matra Iv iter Date Collected 5/20/97 <br /> Date Received: 5/23/97 <br /> BTEX,MTBE dnd TPH as Gasoline <br /> Sdmple Name. VW-12(6 11 <br /> Lab Cade X9700958-012 Units ug/L(ppb) <br /> Test Notes Basis NA <br /> Prep Analv,^ Dilution Date Date Restilt <br /> Analyte Wthod Method MRL Factor Extracted Analyzed yz Result Notes <br /> TPH as Gasoline EPA 5030 CA/LUFT 50 <br /> 2 NA 5131/97 1500 <br /> Benzene EPA 5030 8020 05 <br /> 2NA 5131/97 150 <br /> Toluene EPA 5030 8020 0 5 <br /> Ethylbenzene EPA 5030 2 NA 5/3 i/97 1 <br /> 8020 0 5 2 NA 5/31/97 <br /> Xylenes Total EPA 5030 8020 58 <br /> 0 5 2 NA 5/3I/97 <1 <br /> Methyl ferf-Buhl Cth�.r EPA 5034 8020 C€ <br /> 3 <br /> 2 NA 5/31/97 <6 C1 <br /> C 1 Fhe NMI,tv�is elevated due to high analyte concentration requiring sample dilution <br /> 152=0597P <br /> Page 14 of 21 <br />