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f - ' Sequoia 680 C-esapeaice Drive Redwood City CA 94063 (4151 364 9600 FAX (415)364 9233 <br /> =f� 404 N V get Lane Walnut C eek CA 94598 {5101 983 9600 FAX(510)988 9673 <br /> Analytical 119 Striker Avenue SUILe 8 Sacramento CA 95834 (916) 921 9600 FAX(916)931 0100 <br /> Unocal Corporation Client Project 10 Unocal #5886, Stokton, CA Sampled Nov 2, 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 # 511-0132 <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Reporting Sample <br /> Analyte Limit I D <br /> erg/L 511-0132 <br /> Tank Pit H2O <br /> MTBE 50 23* <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 11/07/97 <br /> Instrument Identification GCHP-2 <br /> Surrogate Recovery 92 <br /> (QC Limits = 60-140%) <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> MTBE standard was not analyzed on November 7 1995 when this sample was analyzed This 1s an estimated <br /> MTBE concentration calculated against the MTBE standard previously analyzed on November 6 1995 <br /> SEQU A ANALYTICAL, P #1624 <br /> da C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 510-1120 UNO <2> <br />