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Y <br /> Y Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (4t5) 364.9600 FAX(415) 364-9233 ' <br /> 404 N.Wiget lane Walnut Creek,CA 94598 (510) 988.9600 FAX(5l0)988.9673 <br /> X117 Analytical $19 Striker Avenue,Suite$ Sacramento,CA 95834 {9l6) 921-9600 FAX(916)921-0100 <br /> Pacific Environmental roup,lnc. Client Project ID: Arco 2083,Tracy, CA Sampled. Nov 15 1996' <br /> :> 11315 Sunrise Gold Circle, #M Sample Matrix: Water Received: Nov 18, 1996::;: <br /> Rancho Cordova, CA 95742 Analysis Method: EPA 5030/8020 Modified Reported: Dec 3, 1996';> <br /> Attention: Greg Barclay First Sample#: 611-0672 E <br /> i . <br /> 1 <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Sample Sample 's Sample Sample Sample Sample i <br /> Analyte Units Results Results Results Results Results Results <br /> Mfg/L 611-0672 611-0673 611-0674 611-0675 611-0676 611-0677 <br /> ATR-2 ATR4 �� ATR-7 ATR-8 ATR-12 SM-1 <br /> .i <br /> I� <br /> MTBE 750 140 I! 120 N.D. N.D. 590 <br /> Reporting Limit: 500 20 25 200* 5.0 100 <br /> ' E <br /> Ir ; <br /> l 3 <br /> i <br /> E w <br /> 4 <br /> 'i <br /> it <br /> Quality Control Data <br /> i <br /> Date Analyzed: 11/26/96 11/26/96 11/26/96 11/26/96 11/25/96 11/26/96 i <br /> i <br /> Instrument Identification: GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-1 GCHP-2 j <br /> I ! <br /> Surrogate Recovery, %: 98 87 , 79 ** 100 109 <br /> (QC Limits = 60-140%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard. 11II <br /> Analytes reported as N.D.were not detected at or above the reporting limit. <br /> `Reporting limit raised due to matrix interference. <br /> —Matrix Interference. <br /> SEQUOIA ANALYTICAL, ELAP #1624 <br /> in C. Schneider <br /> Project Manager/Sacramento Laboratory li <br /> 6110672.PES <3,- <br /> i <br /> ,y , <br />