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1, Sequoia uoia 680 Chesapeake Drive Redwood City,CA 94063 ;(415) 364-9600 FAX(415) 364.9233 <br /> L ` 1 404 N.Wiget Lane Walnut Creek,CA 94598 '(510) 988-9600 FAX(510)988.9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100 <br /> Analytical <br /> Advanced GeoEnvironmental Project: Stockton Fire#3 Sampled: 7/27/98 <br /> 4005 North Wilson Way Project Number: N/A Received: 7/28/98 <br /> Stockton,CA 95205 Project Manager: Bill Little Reported: 8/1.1,8/12/98 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control. <br /> Sequoia Analytical-Sacramento <br /> LDate Spike . Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> LBatch: 8080117 Date Prepared: 8/10/98 Extraction Method: EPA 5030B(P/Tl <br /> Blank 8080117-BLKI <br /> Ethanol 8/10/98 ND ug/l 3000 <br /> Tert-butyl alcohol ND 200 <br /> Methyl tert-butyl ether ND 2.00 <br /> Di-isopropyl ether ND 2,00 <br /> Ethyl tert-butyl ether ND 2.00 <br /> Tert-amyl methyl ether ND " 2.00 <br /> Surrogate: 1,2-DCA-d4 50.0 68.0 60.0-140 136 <br /> LLES 8080117-BSI <br /> Methyl tert-butyl ether 8/10/98 50.0 65.0 ug/l 70,0-130 130 <br /> Surrogate: 1,2-DCA-d4 50.0 57.0 60.0-140 114 <br /> trix Spike 8080117-MS1 <br /> LI*'M6hyI tert-butyl ether 8/10/98 50.0 74.0 ug/1 60.0-140 3 <br /> Surrogate: 1,2-DCA-d4 50.0 73.0 60.0-140 146 4 <br /> LMatrix Spike Dun 8080117-MSD1 <br /> Methyl tert-butyl ether 8/10/98 50.0 79.0 ug/1 60.0-140 25.0 3 <br /> Surrogate: 1,2-DCA-d4 50.0 74.0 60.0-140 148 4 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Ronald W Bobel,Client Services Representative Page.5 of 6 <br />