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6so Chesapeake Drive Redwood City CA 94063 (415) 364 9600 F <br /> Sequoia FAX(i 15) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (5 10) 986 9600 FAX(5t0)988 9673 <br /> �I11 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> • PacUic'Envi'ronmental Group, Inc Client Project ID h Arco 02133, Stockton CA n <br /> I Sampled Dec 4, i 996 <br /> 11315 Sunrise Gold Circle, #M Sample Matrix Water Received Dec 5, 1996 <br /> Rancho Cordova, CA 95742 Analysis Method EPA 5030/8020 Modifies! Reported Dec 17, 1996 <br /> Attention Rusty Benkoslry First Sample # 612-0181 <br /> .. ,. } } ..�.v .,u m h v. n v 4 ♦ }n v ry r . V s. v v v r v ,. l ..- <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Sample Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Results Results <br /> pg/L 612-0181 612-0182 612-0183 612-0184 612-0165 612-0186 <br /> E-2 E$ E-9 E 10 E-11 E 12 <br /> MTBE 87 N D 560 27,000 N D N D <br /> Reporting Limit 50 50* 200 10,000 so 50 <br /> Quality Control Data <br /> Date Analyzed 12/06/96 12/06/96 12/06/96 12/12/96 12/10/96 12/10/96 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % ** 139 108 80 106 102 <br /> (QC Limits = 60-140%) <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 /> inda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 6120181 PEs <3> <br />