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COLUMBIA ANALYTIC-AL SERVICES, INC. <br /> Analvtical P--port <br /> Client ARCO Products Company Service Request- S9601408 <br /> Project: 2168 STOCKTON/21775-23 4 002/TO##19350 00 Date Collected 8122/96 <br /> Sample Matrix Water Date Received 8/27/96 <br /> Date Extracted NA <br /> BTEX MTBE and T'-'H as Gasoline <br /> EPA Methods 5030/8020/Calrfcrma DHS LUFT Method <br /> Uruts ug/L ppb) <br /> Sample Name MW-1 (54) MW-2 (52) MW-3 (53) <br /> Lab Code S960I408-001 59601408-002 59601408-003 <br /> Date Analvzcd 8/30/96 9/4/96 8/30/96 <br /> Analvte MRL <br /> TPH as Gasoline 50 35 000 34 000 53 000 <br /> Benzene 0 5 9 100 5 900 14 000 <br /> Toluene 0 5 1,000 2 500 2000 <br /> Ethvlbenzene 0 5 1,000 560 2,400 <br /> Total Xvlenes 05 2000 2,300 2 900 <br /> Methvl tert-Butvl Ether 3 <500* <300** <500* <br /> * Raised MRL due to high analyte concentration rcu--unng sample dilution <br /> ** Raised MRL due to matrix interference <br /> X522/050194 <br /> Page 3 <br />