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COLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> Client: ARCO Products Company Service Request: 59700959 <br /> Project: 2 1 775-2 3 7.002:'1'0#21333.00/2186 STOCKTON Date Collected• 5/22197 <br /> Sample Matrix: Water Date Received: 5/13197 <br /> BTEX,MTBE and TPH as Gasoline <br /> Sample Name: VW-313(45) Units: uWL(ppb) <br /> Lab Code: 59700959-004 Basis: NA <br /> Test Notes: <br /> Prep Analysis Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> TPH as Gasoline EPA 5030 CA/LUFT 50 1 NA 6/2/97 240 <br /> Benzene EPA 5030 8020 0.5 1 NA 6/2/97 ND <br /> Toluene EPA 5030 8020 0.5 I NA 6/2/97 ND <br /> Ethylbenzene EPA 5030 8020 0.5 1 NA 6/2/97 ND <br /> Xylenes,Total EPA 5030 8020 0.5 1 NA 6/2197 ND <br /> Methyl tert-Buh•I Ether EPA 5030 8020 3 1 NA 6/'2/97 ND <br /> . 1S291026397p <br /> Page 6 of l 1 <br />