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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921 9600 • FAX (916) 921-0100 <br /> rown& Caldwell Client Project ID Arco 2133-94-5, Stockton Sampled Apr 12, 1994 <br /> 0 Box 13449 Sample Matrix Water Received Apr 13, 1994 <br /> Sacramento, CA 95813-3449 Analysis Method EPA 5030/8015/8020 Reported Apr 20, 1994 <br /> Attention Mindy Wright First Sample# 404-0380 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D. <br /> pg/L 404-0380 <br /> Tank <br /> Purgeable <br /> Hydrocarbons 50 630 <br /> Benzene 0 50 34 <br /> Toluene 0 50 14 <br /> Ethyl Benzene 050 13 <br /> Total Xylenes 050 86 <br /> Chromatogram Pattern Gasoline <br /> C6-C 12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 4/19/94 <br /> Instrument Identification HP-2 <br /> Surrogate Recovery, % 108 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as Ni D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL <br /> OCA e.,k- C <br /> Craig C te <br /> Project Manager <br /> 4040380 6R$ c 1 n <br />