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COLUMBIA ANALYTICAL SERVICES. INC. <br /> Analytical Report <br /> Mint- EMCON Associates Date Received. 04/23/92 <br /> 40 Project: EMCON Project No G71-29 01 Work Order#. SJ92-0490 <br /> Arco Facility No 2130 Sample Matrix. Water <br /> BTEX and TPH as Gasohne <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> yg/L (ppb) <br /> Sample Name MW-1 1731 MW-2 (72) MW-3 172) <br /> Date Analyzed 04/27/92 04/29/92 05/01/92 <br /> AnalM MRL <br /> Benzene 05 1,400 16 49 <br /> Toluene 05 360 ND ND <br /> Ethylbenzene 05 53 22 ND <br /> Total Xylenes 0 5 260 53 46 <br /> TPH as Gasoline 50 5,200 1,500 110 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> Approved by u Date 6 l <br /> 2 <br />