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COLUMBIA ANALYTICAL SERVICES,INC_ <br /> t� Analytical Report <br /> Client: ARCO Products Company Service Request: 59601539 <br /> Project: 2130 Stockton/##21775-229 002/TO##19350 00 Date Collected: 9/18/96 <br /> Sample Matrix: Water Date Received: 9/20/96 <br /> Date Extracted: NA <br /> BTEX,MTBE and TPH as Gasoline <br /> EPA Methods 5030/8020/Califomia DHS LUF r Method <br /> Units ug/L (Ppb) <br /> Sample Name MW-7 (72) MW-10 (71) Method Blank <br /> Lab Code S9601539-007 59601539-008 S96930-WB1 <br /> Date Analyzed 1011196 10/1/96 9130/96 <br /> Analyte MRL <br /> TPH as Gasoline 50 'STD 510 ND <br /> Benzene 05 ND <15 D ND <br /> T olu;ne 0 5 ND L ND <br /> Ethylbenzene 05 ND ND ND <br /> Total Xylenes 05 ND ND ND <br /> Methyl tort-Butyl Ether 3 ND <9 D ND <br /> D The MRL is elevated because of matrix interferences <br /> 3S2Y/004 <br /> Page 5 <br />