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i <br />�a 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 <br /> (9 16)921-9600 FAX(916)921-0 1 Do <br /> 455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Analytical ',551 Industrial(Load San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> SECOR International Project Chevron 9-6258,Stockton,CA Sampled 4115199 <br /> 9912 Business Park Drive,Ste 100 Project Number 7GO07-018-01 Received 4116199 <br /> Sacramento,CA 95827 Pro ect Manager Roger Hoffmore Reported 4130/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A/Qualrty Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes" <br /> Batch, 9040281 Date Prepared. 4/2.3(99 Extraction Method. EPA 5030B IP/TI <br /> Blank 9040281-BLK l <br /> Tert-butyl alcohol 4123199 ND ug/l 200 <br /> Methyl tert-butyl ether ND 200 <br /> D1-isopropyl ether PID 200 <br /> Ethyl Cert-butyl ether PID 200 <br /> Tert-amyl methyl ether ISD 200 <br /> Ethanol ND 3000 <br /> Surrogate 1 2 DCA-d4 500 532 600-140 106 <br /> 1.C'S 9040281-BSI <br /> Methyl tent-butyl ether 4123/99 Soo 626 ug/l 700-130 125 <br /> Surrogate 12 DCA-d4 500 548 600-140 110 <br /> atrix Spike 9040281-MSI S%4276-01 <br /> ethyl cert-butyl ether 4123199 500 ND 598 ug/l 600-140 120 <br /> arrogate 1 2-DCA-d4 11500 552 600 140 110 <br /> Matrix Spike Dun 9040281-MSD1 5904276-01 <br /> Methyl tert-butyl ether 4/23199 500 ND 596 ug/i 600-140 119 250 0 837 <br /> Surrogate 12-DCA-d4 500 550 600-140 110 <br /> Q,LqZo-,aAnalyt&C31-Sacramento r "Refer to end of rrpur.for text of notes and definitions �w <br /> Sandra R Hanson,Client Services Representative Page 13 of 14 <br />