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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client: EMCON Associates Date Received- 04/07/93 <br /> Project: EMCON Project No OG71-029 01 Service Request No SJ93-0472 <br /> ARCO Facility No 2130 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503018020/California DHS LUFT Method <br /> jig/l- ippbl <br /> Sample Name MW-1 1741 MW-2 1721 MW-3 1731 <br /> Date Analyzed 04/14193 04/14/93 04/14/93 <br /> Anaivte MRL <br /> Benzene 0 5 250 7 1 3 0 <br /> Toluene 0 5 64 <2 5 ' ND <br /> Ethyibenzene 0 5 30 31 ND <br /> Total Xylenes 0 5 76 8 8 2 7 <br /> TPH as Gasoline 50 1 500 1,000 200 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> • Raised MRL due to high analyte concentration requiring sample dilution <br /> Approved by Ct 1�a Date Y <br /> 2 <br />