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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client: EMCON Associates Date Received: 12108192 <br /> Project: EMCON Project No. OG71-033.01 Service Request No.: SJ92-1544 <br /> ARCO Facility No. 548 Sample Matrix: Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LUFT Method <br /> Vg/L (ppb) <br /> Sample Name: MW-4 (63) Method Blank Method Blank <br /> Date Analyzed: 12/09/92 12/09/92 12/11/92 <br /> • An^ a_lyle MRL <br /> Benzene 0.5 NO NO ND <br /> Toluene 0.5 ND ND NO <br /> Ethylbenzene 0.5 ND ND ND <br /> Total Xylenes 0.5 NO NO NO <br /> TPH as Gasoline 50 NO NO ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> NO None Detected at or above the method reporting limit <br /> R Approved by: l c <br />