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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report <br /> Client EMCON Associates Date Received 07/31/92 <br /> Project EMCON Project No G71-19 01 Work Order # SJ92-0945 <br /> Arco Facility No 2133 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/DHS LUFT Method <br /> Ng/L 1ppb) <br /> Sample Name E-12 {22) E-8 (231 E-10 (22) <br /> Date Analyzed 08/04/92 08/04/92 08/05/92 <br /> Analyte MRL <br /> Benzene 05 18 81 3,400 <br /> Toluene 05 29 1 3 1,100 <br /> Ethylbenzene 05 27 5.7 1,400 <br /> • Total Xylenes 05 54 60 6,400 <br /> TPH as Gasoline 50 830 690 42,000 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> • D Approved by ? Gl t DateAlm/ <br /> 3 <br /> 11924 Ringwood Avenue Son Jose California 95131 • Telephone 408/437-2400 • Fox 4081437-9356 <br />