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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364.9133 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 %00 FAX(916)921 0100 <br /> Brown & Caldwell Client Project ID Arco 2133 Stockton Sampled Jun 12, 1995 <br /> 9616 Micron Ave Suite 600 Sample Matrix Water Received Jun 14, 1995 <br /> Sacramento CA 95827 Analysis Method EPA 5030/8015/8020 Reported Jun 27, 1995 <br /> Attention Mindy Patterson First Sample # 506-0791 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D <br /> µg/L 506-0791 <br /> Tank <br /> Urges e <br /> Hydrocarbons 50 760 <br /> Benzene 050 29 <br /> Toluene 050 3 4 <br /> Ethyl Benzene 050 36 <br /> Total Xylenes 050 94 <br /> Chromatogram Pattern- Gasoline <br /> Cs-C12 <br /> Quality Control Data <br /> Report Umrt Multiplication Factor 10 <br /> Date Analyzed 6/19/95 <br /> Instrument Identificatlon GCHP-2 <br /> Surrogate Recovery, % 100 <br /> (QC Umlts = 70-130%) <br /> Purgeable Hydrocarbons are quanttffted against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL,EEAP(#1624 <br /> f� -�L <br /> 1*IV— <br /> Janet H an <br /> Project Manager <br /> 500=1 BRS <11> <br />