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Sequoia— 680 Cheupcake Dnve Redwood City CA 94063 (415) 364 96W FAX{4M 364-9233 <br /> 404 N Wiget Lane Walnut Creek C4 94598 (510) 988 9600 FAX(SIO)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Pacrfic Environmental Group, Inc Client Project ID Arco 2093, Tracy, CA Sampled Jul 18, 1996 <br /> 11315 Sunrise Gold Circle, #M Sample Matrix Water Received Jul 19, 1996 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8015/8020 Reported Jul 30, 1996 <br /> Attention Greg Barclay First Sample # 607-0844 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D. I D I D I D I D. <br /> erg/L 607-0844 607-0845 607-0846 607-0847 607-0848 607-0849 <br /> ATR-7 ATR-8 ATR 9 ATR-10 ATR-11 ATR-12 <br /> Purgeable <br /> Hydrocarbons 50 N D 88,000 N D N D N D N D <br /> Benzene 050 N D 72 N D N D N D N D <br /> Toluene 050 N D 220 N D N D N D N D <br /> Ethyi Benzene 0 50 N D 620 N D N D N D N D <br />• Total Xylenes 0 50 N D 2,500 N D N D N D N D <br /> Chromatogram Pattern weathered <br /> Gasoline <br /> >C7 <br /> Duality Control Data <br /> Report Limit Multiplication Factor 10 100 1 0 1 0 1 0 1 0 <br /> Date Analyzed 07/24/96 07/24/96 07/24/96 07/24/96 07/24/96 07/24/96 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 81 90 80 77 85 86 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, ELAP #1624 <br /> 7;�6 <br /> rinda C Schneider <br />///,P-roject Manager/Sacramento Laboratory <br /> 6070838 PES <2> <br />