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SEQUOIA ANALYTICAL <br /> 319 Striker Avenue Suite 8 - Sacramento CA 95834 <br /> 916) 921 9600 - FAX {9161 921 0100 <br /> • Brown & Caldwell Client Prosect ID Arco 434-93-5 Lodi Sampled Dec 7 1993 <br /> P O Box 13449 Sample Matrix Air Received Dec 8 1993 <br /> Sacramento CA 95813-3449 Analysts Method EPA 5030/8015/8020 Reported Dec 10 1993 <br /> Attention Mindy Wright First Sample # 3120309 <br /> i <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> mg/ 312-0309 312-0310 <br /> cubic m Cat OX Cat OX <br /> Influent Effluent <br /> Purgeable <br /> Hydrocarbons 50 950 74 <br /> Benzene 0 050 N D N D <br /> Toluene 0 054 15 N D <br /> Ethyl Benzene 0 050 14 N D <br /> Total Xylenes 0 050 150 N D <br /> Chromatogram Pattern Gasoline - <br /> Qualdy Control Data <br /> Report Limit Multiplication Factor 50 1 0 <br /> Date Analyzed 12/8/93 12/8/93 <br /> Instrument Identification HP2 HP2 <br /> Surrogate Recovery, % 102 106 <br /> (CC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N R were not detected above the stated reporting limit <br /> . SEQUOIA ANALYTICAL <br /> I `f <br /> Linda C Schneider <br /> Project Manager <br /> 3120309 BRS <1> <br /> 1 <br />