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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 e Sacramento CA 95834 <br /> (916) 921 9600 e FAX (916) 921-0100 <br /> Brown & Caldwell Client Project ID Arco 2133-94-5, Stockton Sampled Feb 23, 1994 <br /> P O Box 13449 Sample Matrix Water Received Feb 24, 1994 <br /> Sacramento CA 95813-3449 - Analysis Method EPA 5030/8015/602 Reported Mar 10, 1994 <br /> Attention Mindy Wright First Sample # 402-1242 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit 1 D <br /> Mcg/L 402-1242 <br /> Tank <br /> Purgeable <br /> Hydrocarbons 50 880 <br /> Benzene 0 50 40 <br /> Toluene 050 11 <br /> Ethyl Benzene 050 12 <br /> Total Xylenes 050 86 <br /> Chromatogram Pattern Gasoline <br /> C&C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 3/9/94 <br /> Instrument Identification HP-1 <br /> Surrogate Recovery, % 98 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL <br /> Craig C 69 <br /> Project Manager <br /> 4021242 BRS <1> <br />