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COLUMBIA ANALYTICAL SERVICES. INC. <br /> Analytical Report <br /> Client- EMCON Associates Date Received- 07/14/92 <br /> Project- EMCON Project No G71-18 01 Work Order# SJ92-0856 <br /> Arco Faceirty No 2093 Sample Matnx- Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Ng/L (ppb) <br /> Sample Name ATR-9 (24) ATR-10 (241 ATR-11 123) <br /> Date Analyzed 07/17/92 07/20192 07/17/92 <br /> Analvie MRL <br /> Benzene 05 ND NO NO <br /> Toluene 0 5 NO NO ND <br /> Ethylbenzene 05 NO NO NO <br /> Total Xylenes 05 NO NO NO <br /> TPH as Gasoline 50 NO NO NO <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> NO None Detected at or above the method reporting limrt <br /> Approved by-A"gi�4 Date—TLAI qz� <br /> 4 <br /> 1921 Rtnnwood AvanuP • Snn Jnca (' hfnrn— 4541+ ---1 <br />