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COLUMBIA ANALYTICAL SERVICES,INC <br /> Analytical Report <br /> Client ARCO Product~Coinpanv <br /> Service Request* S9700958 <br /> Projeet 21775-229 00310,'21333 00/2130 S rOCKTON Date Collected 5/21/'97 <br /> Sainpli,Matrix Water Date Received: M23197 <br /> B rEX,MTBE and TPH as Gasoline <br /> SampleNamc, MW-1 (73) Units ug/L(ppb) <br /> Lab Code 59700958-001 Basis <br /> Teat Notes <br /> Prep Analysis Dilution Date Date Result <br /> Analyte Mcthod Method MRL Factor Extracted Analyzed Result Notes <br /> fPH as Gasoluie. EPA 5030 CA/LUf7 50 i NA 5/31/97 230 <br /> Benzene EPA x030 8020 0 5 I NA 5/31/97 <7 MI <br /> Toluene CPA 5030 8020 0 5 l NA 5/31/97 <0 6 Ml <br /> Ethylbenzene EPA X030 8020 0 5 1 NA 5/31/97 ND <br /> Xylenes Total EPA 5030 8020 0 5 1 NA 5/31/97 05 <br /> Methyl/err-Butvl Lilic,r EPA 5030 8020 3 1 NA 5/31/97 <5 MI <br /> I <br /> MI The MRL kva,elevated because of matnx mterferences <br /> IS221Q20597p <br /> Page 3 of 21 <br />