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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 Oct 14, 1992 <br /> 723 S St Sample Matrix Water Received Oct 14, 1992 <br /> Sacramento, CA 95814 Analysis Method EPA 5030/8015/8020 Reported Oct 22, 1992 <br /> Attention Steve Tan First Sample # 210-0394 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I.D. <br /> pg/L 210-0394 <br /> Tank <br /> Purgeable <br /> Hydrocarbons 50 N D <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyi Benzene 050 N D <br /> Total Xylenes 050 N D <br /> Chromatogram Pattern -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 10/20/92 <br /> Instrument Identification HP-1 <br /> Surrogate Recovery, % 97 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br />. <br /> SEQUOIA ANALYTICAL <br /> Michael R Giles <br /> Laboratory Director <br /> 2100394 BR5 <t> <br />