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• , ■ ' Sequoia 680 C-esapeake Drive Redwood City CA 94063 415) 304 9600 FAX(415) 364 9233 <br /> d 404 N Wiget Lanc Walnut C eek CA 94598 {510) 988 9600 FAX{510)938 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Unocal Corporation Client Project ID Unocal #5886, Stokton, CA Sampled Oct 25, 1995 <br /> *2000 Crow Canyon Place, #400 Sample Matrix Water <br /> San Ramon, CA 94583 Analysis Method EPA 5030/8020 Modified <br /> Attention Ed Ralston First Sample # 510-1120 <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> pg/L 510-1120 510-1030 <br /> Pit H2O Pit Water <br /> MTBE 50 42 170 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 <br /> Date Analyzed 10/30/97 10/30/97 <br /> Instrument Identification GCHP-2 GCHP-2 <br /> Surrogate Recovery 98 91 <br /> (QC Limits = 60-140%) <br /> T—NP <br /> ,' <br /> Analytes reported as N D were not detected at or above the reporting limit ' <br /> FnAA 5 197 t <br /> SEQU IA ANALYTICA ELAP #1624 <br /> U <br /> t <br /> 1 da�chneider <br /> Project Manager/Sacramento Laboratory <br /> 510-1120 LINO <i> <br />