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1 <br /> Sequoia 680 Chesapeake Drive cZedwood City CA 9.1063 1415) 364 9600 FAX(415) 364 9233 - <br /> 404 N Wiget Lane Walnut Creek CA 94598 �510) 988 9600 F4X(510)98a 9673 <br /> I%Ao Analytical 8i9 Striker Avenue Suite 8 Sacramento CA 95834 916) 921 9600 FAX(916)921 0100 <br /> Brown & Caldwell Client Project ID Arco 2133 Stockton Sampled Jul 8 1995 <br /> 9616 Micron Ave , Suite 600 Sample Matrix Air Received Jul 10 1995 <br /> Sacramento CA 95827 Analysis Method EPA 5030/8015/8020 Reported Jul 17, 1995 <br /> Attention Mindy Patterson First Sample # 507-0224 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit ID ID <br /> ppmv 507-0224 507-0225 <br /> INF EFF <br /> Purgeable <br /> Hydrocarbons 14 140 19 <br /> Benzene 0 016 N D N D <br /> Toluene 0 013 080 0 014 <br /> Ethyl Benzene 0 012 015 0 090 <br /> . Total Xylenes 0 012 23 039 <br /> Chromatogram Pattern Gasoline Gasoline <br /> C6-10 12 C6-C 12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 50 10 <br /> Date Analyzed 7/10/95 7/11/95 <br /> Instrument Identification GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 124 95 <br /> (OC Limits = 70-130%) <br /> Purgeabie 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 ANA YTl AL, E P#1624 <br /> Janet rlan <br /> Project Manager <br /> 5070224 ORS a t> <br />