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COLUMBIA ANALYTICAL SERVICES, INC <br /> Analytical Report _a <br /> Client EMCON Associates Date Received 06/71/93 <br /> Project EMCON Project No OG71-038 01 Service Request No SJ93-0776 <br /> ARCO Facil4ty No 2168 Sample Matrix Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LOFT Method <br /> !19/L (ppb) <br /> Sample Name MW-1 (54) MW-2(53) MW 531 <br /> Date Analyzed 06117/93 06/17/93 06/17193 <br /> Analyte MRL <br /> Benzene 0 5 5,600 3,700 12,000 <br /> Toluene 0 5 640 1 ,800 2,100 <br /> Ethylbenzene 0 5 470 280 1,800 <br /> Total Xylenes 0 5 1,400 1 ,100 3,200 <br /> TPH as Gasoline 50 23,000 19,000 44,000 <br /> Approved by �L Date <br /> 4 <br />