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1ZSequoia o80 Chesapeake Drive redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1%04nalytYeal 1900 Bates Avenue Suite L Concord CA 94520 510} 686 9600 FAX(5 to)686 9689 <br /> i 819 Stnker Avenue suite 8 Sacramento CA 95834 916} 921 9600 FAX(916)921 0100 <br /> iBrown & Caldwell Client Project ID Arco 2133, Stockton Sampled Feb 9, 1995 <br /> 9616 Micron Ave Suite 600 Sample Matrix Water Received Feb 10 1995 <br /> Sacramento CA 95827 Analysis Method EPA 5030/8020 Reported Feb 24 1995 <br /> Attention Mindy Patterson First Sample# 502-0287 <br /> BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D. <br /> Mg/L 502-0287 <br /> Tank <br /> Benzene 050 31 <br /> Toluene 050 66 <br /> Ethyl Benzene 050 60 <br /> Total Xylenes 050 69 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 2/10/95 <br /> Instrument Identification GCHP-1 <br /> Surrogate Recovery, % <br /> (OC Limits = 70-130%) <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL Please mote <br />•ELAP #1624 *Matrix interference <br /> 12isHr iris <br /> 99 <br /> Project Manager <br /> 5020=BFIS e2> <br />