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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 9219600 • FAX (916) 921-0100 <br /> Brown &Caldwell Client Project ID Arco #2133, Stockton Sampled Sep 23, 1992 <br /> 723 S St Sample Matrix Water Received Sep 23, 1992 <br /> Sacramento, CA 95814 Analysis Method EPA 5030/8015/8020 Reported Sep 25, 1992 <br /> Attention Steve Misner First Sample # 209-0309 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D <br /> Ng/L 209-0309 <br /> Tank <br /> Purgeable <br /> Hydrocarbons 50 100 <br /> Benzene 050 0 78 <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 050 <br /> • Total Xylenes 050 34 <br /> Chromatogram Pattern Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 9/24/92 <br /> Instrument Identification HP-2 <br /> Surrogate Recovery, % - <br /> PC 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 /> SEQUOIA ANALYTICAL <br /> Michael R Giles <br /> Laboratory Director <br /> 2090309 BRS <1> <br />