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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 07/10/92 <br /> Project EMCON Project No G71-29 01 Work Order # SJ92-0835 <br /> i Arco Facility No 2130 Sample Matrix- Water <br /> i BTEX and TPH as Gasoline <br /> EPA Methods 503018020/DHS LUFT Method <br /> erg/L (Ppb) <br /> I <br /> Sample Name Method Blank Method Blank <br /> Date Analyzed 07/15/92 07/16/92 <br /> 1 <br /> Analyte MRL <br /> Benzene 0 5 NO NO <br /> Toluene 0 5 NO NO <br /> Ethylbenzene 0 5 NO NO <br /> 1 Total Xylenes 0 5 ND NO <br /> TPH as Gasoline 50 ND NO <br /> 1 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> 1 <br /> 1 <br /> 1 <br /> Approved by Date_ <br /> 1 <br /> 3 <br />