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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 434-95-5 Lodi Sampled May 2, 1994 <br /> P O Box 13449 Sample Matrix Air Received May 3, 1994 <br /> Sacramento CA 95814 Analysis Method EPA 5030/8015/8020 Reported May 19, 1994 <br /> Attention Mindy Wrtght First Sample # 405-0816 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> ppmv 405-0816 405-0817 <br /> Cat Ox Cat Ox <br /> Influent Effluent <br /> Furgeable <br /> Hydrocarbons 1 4 280 N D <br /> Benzene 0 016 N D N D <br /> Toluene 0 013 091 N D <br /> Ethyl Benzene 0 012 22 N D <br /> Total Xylenes 0 012 32 N D <br /> Chromatogram Pattern Gasoline <br /> C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 <br /> Date Analyzed 5/4/94 5/3/94 <br /> Instrument Identification GCHP-2 GCHP-17 <br /> Surrogate Recovery, % 97 96 <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 /> �/) <br /> Craig C <br /> Project Manager <br /> 40WS16 SRS <1> <br />