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COLUMBIA ANALYTICAL SERVICES. INC <br /> d <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 /> Arco Facility No 2130 Sample Matnx Water <br /> i <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030180201DHS LUFT Method <br /> ug/L (ppb) <br /> Sampie Name MW-1 1731 MW-2 [721 MW-3 1731 <br /> Date Analyzed 07/15/92 07/16/92 07116/92 <br /> Analyte MRL <br /> Benzene 0 5 1,900 140 1 5 <br /> • Toluene 0 5 320 36 ND <br /> Ethyibenzene 05 89 27 ND <br /> Total Xylenes 0 5 230 45 1 2 <br /> TPH as Gasoline 50 6,500 2,100 55 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> p 9 <br /> ND None Detected at or above the method reporting limit <br /> I <br /> Approved by Date mlaw-ga <br /> 2 <br />