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- ( \ Sequoia 680 Chesapeake Dnvc Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9133 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (5 10) 988 9600 FAX(510)986-9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento C4 95834 (916) 921 9600 FAX(916)921 0100 <br /> Pacific Environmental Group, Inc Client Project ID Arco 2093, Tracy, CA Sampled Jul 18, 1996 <br /> 11315 Sunrise Gold Circle, #M Sample Matrix Water Received Jul 19, 1996 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8020 Modified Reported Jul 30, 1996 <br /> Attention Greg Barclay First Sample # 607-0838 <br /> Methyl Tertiary Butyl Ether (MTBE) <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D I D i D I D 10 <br /> pg/L 607-0838 607-0839 607-0840 607-0841 607-0842 607-0843 <br /> ATR-1 ATR-2 ATR-3 ATR-4 ATR-5 ATR-6 <br /> MTBE 50 N D 500 1,800 560 14 10 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 5o 100 10 10 1 0 <br /> Date Analyzed 07/24/96 07/24/96 07/24/96 07/24/96 07/24/96 07/24/96 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery 79 88 89 74 80 84 <br /> (QC Limits = 70-130%) <br /> Analytes reported as N 0 were not detected at or above the reporting limit <br /> 7 SEQUOIA ANALYTICAL, ELAP #1624 <br /> �iC%'C�li�� <br /> nda C Schneider <br /> /Project Manager/Sacramento Laboratory <br /> 6070838 PES <4> <br />