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Sequoia 680 Chesapeake Dnve Redwood Ctry CA94G63 (4t5) 364 9600 FAX(419) 364 9233 <br /> (i) 404 N Wiget lane Walnut Creek CA 94598 (310) 988 9600 FAX{510)988 9673 <br /> q1W Analytical 819 5tnkerAvenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Brown & Caldwell Client Project ID ARCO 02133, Stockton, CA Sampled Jun 5, 1997 <br /> 9616 Micron Ave , Surte 600 Sample MatnX 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# 706-0166 <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Sample Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Results Results <br /> ug/L 7086 706-0187 706-0188 706-W 89 706-0190 706-0191 <br /> PR-1 MW� i=-12 11� -ECE <br /> MTBE ND ND ND ND ND ND <br /> Reporting lamit so so 50 so so 50 <br /> Quality Control Data <br /> Date Analyzed 06/16/97 06/16/97 06/16/97 06/16/97 06/16/97 06/16/97 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-7 GCHP-7 <br /> Surrogate Recovery, % 84 84 84 84 88 93 <br /> (OC Limits = 60-140%) <br /> Purgeable 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, FLAP#1624 <br /> eoadliA IIA r�A-.AJO <br /> Edana M Fruciano <br /> Project Manager/Sacramento Laboratory <br /> 7060186 SRS <3> <br />