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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 • Sacramento CA 95834 <br /> 916) 921 9600 • FAX (9161 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 Analvsis Method PPA 5030/8015,8020 Reported May 19 1994 <br /> Attention Mindy Wright 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 /> urgeab e <br /> Hydrocarbons 1 4 280 N D <br /> Benzene 0 016 N D N D <br /> Toluene 0 013 0 91 N D <br /> Ethyl Benzene 0 012 2 2 N D <br /> Total Xylenes 0 012 32 N D <br /> Chromatogram Pattern Gasoline - <br /> C6-C 12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 <br /> Date Analyzed 5/4/94 5/3/94 <br /> Instrument Identdicatlon GCHP-2 GCHP-17 <br /> Surrogate Recovery, % 97 96 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Anaiytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL Craig C <br /> Project Manager <br /> 4050816 SRS <1> <br />