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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 • Sacramento CA 95834 <br /> (916) 921 9600 • PAX (9161 921 0100 <br /> t* Brown & Caldwell Client Project 1D Arco 434-94-5 Lodi Sampled Apr 12 1994 <br /> P O Sox 13449 Sample Matrix Air Received Apr 13 1994 <br /> Sacramento CA 95813-3449 Analysis Method EPA 5030/8015/8020 Reported Apr 14 1994 <br /> Attention Mindy Wright First Sample # 404-0378 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D 1 D <br /> ppmv 404-0378 404-0379 <br /> CAT OX CAT OX <br /> Influent Effluent <br /> Purgeaule <br /> Hydrocarbons 1 4 280 N D <br /> Benzene 0 016 N D N D <br /> Toluene 0 013 19 N D <br /> Ethyl Benzene 0 012 35 N D <br /> Total Xylenes 0 012 45 N D <br /> Chromatogram Pattern Gasoline - <br /> c6-c12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 <br /> Date Analyzed 4/13/94 4/13/94 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 100 98 <br /> (OC Limits = 70-130%) <br /> I <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 /> L—A-- <br /> Craig <br /> a—Craig C L1 <br /> Project Manager <br /> 4040378 SRS <t> <br />