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j SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> Brown & Caldwell Client Project ID Arco #2133, Stockton Sampled Jun 24, 1992 <br /> 723 S St Matrix Descnpt Water Received Jun 24, 1992 <br /> Sacramento, CA 95814 Analysis Method EPA 5030/8015/8020 Analyzed Jul 1, 1992 <br /> Attention Steve Misner First Sample # 206-0611 Reported Jul 6, 1992 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS with BTEX DISTINCTION (EPA 8015/8020) <br /> Sample Sample Low/Medium B P Ethyl Detection <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes Limit <br /> Mcg/L pg/L pg/L pg/L Mg/L Multiplication <br /> (ppb) (ppb) (ppb) (ppb) (ppb) Factor <br /> 206-0611 Tank 1 940 100 33 94 100 DL x 5 <br /> s <br /> Detection Limits 30 030 030 030 030 <br /> Low to Medium Boding Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL <br /> Michael R Giles <br /> Laboratory Director <br /> 2060611 BCP <1> <br />