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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 2133-94-5 Stockton Sampled Mar 15 1994 <br /> P O Box 13449 Sample Matrix Water Received Mar 16, 1994 <br /> Sacramento CA 95813-3449 Analysis Method EPA 5030/8015/8020 Reported Mar 30, 1994 <br /> Attention Mindy Wright First Sample # 403-0688 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D <br /> pg/L 403-0688 <br /> Tank <br /> Purgeable <br /> Hydrocarbons 50 830 <br /> Benzene 050 44 <br /> Toluene 050 24 <br /> Ethyl Benzene 050 26 <br /> Total Xylenes 050 120 <br /> Chromatogram Pattern Gasoline <br /> C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 3/22/94 <br /> Instrument Identification HP-2 <br /> Surrogate Recovery, % 122 <br /> (QC Limits = 70-130%) <br /> Purgeabie 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 /> Craig C ee <br /> Project Manager <br /> 4030668 BRs <1 n <br />