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J \ Sequoia 680 Chesapearc Dnvc Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 1900 Bates Avenue Suuc L Concord CA 94520 (510) 6869600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 1916) 921 9600 FAX(916)921 0100 <br /> Brown & Caldwell Client Project ID Arco 2133, Stockton Sampled Apr 10, 1995 <br /> 9616 Micron Ave Suite 600 Sample Matrix Water Received Apr 10 1995 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020 Reported Apr 21 1995 <br /> Attention Mindy Patterson First Sample# 504-0346 <br /> BTEX DISTINCTION <br /> Reporting Sample <br /> Anaiyte Limit i D. <br /> pg/L 504-0346 <br /> Tank <br /> Benzene 050 32 <br /> Toluene 050 064 <br /> Ethyl Benzene 050 1 6 <br /> Total Xylenes 050 13 <br /> Cluaidy Control Data <br /> Report Lima Multiplication Factor 1 0 <br /> Date Analyzed 4/18/95 <br /> Instrument Identrtication GCHP-1 <br /> Surrogate Recovery, % <br /> (QC Limits = 70-130%) <br /> Analytes reported as N D were not detected at or above the repotting limit <br /> . SEQUOIA ANALYTICAL Please Note <br /> ELAP #1624 *Mattrx Interference <br /> Linda C Schneider <br /> Project Manager <br /> 5040346 BRS <i> <br />