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Sequoia 680 Chesapeake Onvc Redwood C,ty CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ,!D404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> qI,,W Analytical 819 Stinker Avenue Suite 8 Sacramento CA 95834 (916) 921 96W FAX(916)921 0100 <br /> Grown & Caldwell Client Project ID ARCO 02133, Stockton, CA Sampled Jun 5, 1997 <br /> 9616 Micron Ave, Suite 600 Sample Matrix Water Received Jun 5, 1997 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020 Modified Reported Jun 18, 1997 <br /> Attention Steve Misner First Sample# 706-0192 <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results <br /> ug/L 706-_0192 706-0193 706-0194 706-0195 <br /> MTBE N D 85 51 170 <br /> Reporting Limit 10 so 50 25 <br /> i <br /> Quality Control Data <br /> Date Analyzed 06/17/97 06/16/97 06/16/97 06/17/97 <br /> Instrument Identification GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> Surrogate Recovery, % 127 82 85 81 <br /> PC Limits = 60-140%) <br /> Purgeabie Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, ELAP #1624 <br /> qbhad�4 $A FgL�U-6�D <br /> Edana M Fruciano <br /> Project Manager/Sacramento Laboratory <br /> 7060186 SRS <4> <br />