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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 12133, Stockton Sampled Dec 16, 1992 <br /> 723 S St Sample Matrix Water Received Dec 16, 1992 <br /> Sacramento, CA 95814 Analysis Method EPA 5030/8015/602 Reported Dec 30, 1992 <br /> Attention Steve Misner First Sample,# 212-0521 r r h <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D. <br /> pg/L 212-0521 <br /> Tank <br /> urgeable <br /> Hydrocarbons 50 650 <br /> Benzene 050 N D <br /> Toluene 050 053 <br /> Ethyl Benzene 050 21 <br /> Total Xylenes 050 48 <br /> Chromatogram Pattern Gas <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 <br /> Date Analyzed 12/18/92 <br /> Instrument Identification HP-2 <br /> Surrogate Recovery, % - <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 /> SEQUOIA ANALYTICAL <br /> •(C� �2 <br /> Michael R Giles <br /> Laboratory Director <br /> 2120521 SRS <11> <br />