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J S \ Sequoia 680 Chesapeake Drive Redwood Giv CA 94063 (415} 364 9600 FAX(415) 364 9233 <br /> ��•� Analytical 1900 Sates Avenue Suite L Concord CA 94520 510) 686 9600 FAX (510)686 9689 <br /> 319 Stnker Avenue Suite 8 Sacramento CA 95834 1916) 921 9600 FAX(916)921 0100 <br />• Brown & Caldwell Client Project ID Arco 21 3 Stockton 5 <br /> j 3 S oc Sampled Feb 9 199 <br /> 9616 Micron Ave Suite 600 Sample Matrix Air Received Feb 10, 1995 <br /> Sacramento CA 95827 Analysis Method EPA 5030/8015/8020 Reported Feb 24 1995 <br /> Attention Mindy Patterson First Sample # 502-0282 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Deporting Sampie Sample Sample Sample Sample <br /> Analyte Limit 1 D. I D. I D I D. I D. <br /> ppmv 502-0282 502-0283 502-0284 502-0285 502-0286 <br /> V-12 V-3 E 6 V 8 V-9 <br /> Purgeable <br /> Hydrocarbons 14 2,300 1,100 280 430 570 <br /> Benzene 0 016 79 44 41 63 72 <br /> Toluene 0 013 14 7 7 24 1 9 11 <br /> Ethyl Benzene 0 012 76 3 7 065 046 2 0 <br /> Total Xylenes 0 012 35 17 30 1 9 11 <br /> Chromatogram Pattern Gasoline Gasoline Gasoline Gasoline Gasoline <br /> C6-C12 C6-C12 C6-C12 C6-C12 C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 100 100 50 10 5 0 <br /> Date Analyzed 2/10/95 2/10/95 2/10/95 2/10/95 2/10/95 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % * 122 96 113 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL Please Note <br /> ELAP#1624 *Matrix interference <br /> ,den ie Higgins <br /> Project Manager <br /> 502029ZBRS <1> <br />