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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client EMCON Associates Data Received: 04/30/93 <br /> Project EMCON Project No OG71-019 01 Service Request No SJ93-0591 <br /> ARCO Facility No 2133 Sample Matrix- Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Ng/L (ppb) <br /> Sample Name E-4 (21) E-5 (19) E-46-I'll 81 <br /> Date Analyzed 05/12/93 05/12/93 05/12/93 <br /> Analyte MRL <br /> Benzene 05 1,300 6,300 3,200 <br /> Toluene 05 22 110 270. <br /> Ethylbenzene 05 280 920 1,400. <br /> Total Xylenes 05 520 2,200 2,300 <br /> TPH as Gasoline 50 14,000 41,000 33,000 <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> Approved by- u Date <br /> 4 <br /> 1921 Ringwood Avenue • San lose California 95131 • Telephone 4081437 2400 • Fox 4081437-9356 <br />