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COLUMBIA ANALYTICAL SERVICES, INC <br /> Anaiyttcai Report <br /> Client; EMCON Associates Date Received: 01/29/92 <br /> Project- EMCON Project No G71-18 01 Work Order #: SJ92-0098 <br /> Arco Facility No 2093 Sample Matrix Water <br /> STEX and TPH as Gasoline <br /> EPA Methods 503018020/DHS LUFT Method <br /> ug/l. (ppb) <br /> Sample Name ATR L291 Method Blank <br /> Date Analyzed: 01/29/92 01129/92 <br /> I <br /> Analyle MRL <br /> Benzene 0 5 300. ND <br /> Toluene 0.5 5.2 ND <br /> Ethyibenzene 0.5 49. ND <br /> • Total Xylenes 0.5 72. ND <br /> TPH as Gasoline 50 1,200. ND <br /> i <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting L1m1t <br /> ND None Detected at or above the method reporting lima <br /> Approved by Date <br /> 5 <br /> 1921 Ringwood Avenue Son lose Californio 95131 Telephone 4081437 2400 Fax 408/437-9356 <br />