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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue Suite LCuncard CA 94520 t5101 686 9600 FAX(g 10)686 9689 <br /> 1WAnalytical 819 Striker Avenue Suite 8 Sacramento �-A 95834 (91(1) 921 9600 FAX(916)921 0100 <br /> Brown & Caldwell Client Project ID Arco 2133-94-5, Stockton Sampled May 16, 1994 <br /> P O Box 13449 Sample Matrix Water Received May 16, 1994 <br /> Sacramento CA 95813-3449 Analysis Method EPA 5030/8015/8020 Reported May 27, 1994 <br /> Attention Mindy Wright First Sample # 405-0783 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limrt I D <br /> Mg/L 405-0783 <br /> Tank <br /> Purgeable <br /> Hydrocarbons 50 440 <br /> Benzene 050 26 <br /> Toluene 050 6 7 <br /> Ethyl Benzene 050 39 <br /> • Total Xylenes 050 55 <br /> Chromatogram Pattern Gasoline <br /> CG-C 12 <br /> Qualdy Control Data <br /> Report Limit Multiplication Factor 10 <br /> Date Analyzed 5/18/94 <br /> Instrument Identification HP-2 <br /> Surrogate Recovery, % 128 <br /> (OC 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 hmit <br /> SEQUOIA ANALYTICAL <br /> CA &LC <br /> Craig C tn . <br /> Project Manager <br /> 4050783 SRS 1> <br /> rr'` <br />