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680 Chesapeake Drtve Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(9,25)988-„9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> � Analytical 1455 McDowell Blvd North Ste 0 Petaluma.CA 94954 (707) 792-1865 FAX(707)792-0342- <br /> Cambna Environmental Project EQUILON,420 1Cettlemen LN Lodi,CA Sampled 2/4/99 <br /> 270 Perkins Street Project Number N/A Received 2/4/99 <br /> Sonoma, CA 95476 Project Manager Mike Murphy Reported 2/5,9, 11199 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analvzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch. 2020110 Date Prepared, 2/5199 Extraction Method EPA 5030B [MeOHI <br /> Blank 9020110-BLK1 <br /> Tert-butyl alcohol 2/8/99 ND mg/kg 100 <br /> Methyl tert-butyl ether ND 0 100 <br /> Di-isopropyl ether ND 0 100 <br /> Ethyl tert-butyl ether ND 0 100 <br /> Tert-amyl methyl ether ND 0 100 <br /> Surrogate 12-DCA-d4 250 224 600-140 896 <br /> LC-S 9020110-BSI <br /> Methyl tert-butyl ether 2,18/99 2 50 236 mg/kg 700-130 944 <br /> Surrogate 1 2-DCA-d4 11250 231 60 0440 924 <br /> Matrix Syike 9020110-MSI S902058-01 <br /> Methyl tert-butyl ether 2/8/99 250 ND 226 mg/kg 600-140 904 <br /> Surrogate 1,2-DCA-d4 " 250 223 600-140 892 <br /> Matrix Spike Dun 9020110-MSDI 5902058-01 <br /> Methyl tert-buryl ether 218/99 250 ND 209 mg/kg 600-140 83 6 25 0 782 <br /> Surrogate 12-DCA-d4 ?T 11 600-140 8i J <br /> Sequoia Analytical-Sacramento *Refer to end of report for tent of notes and deftni <br /> Sandra R Hanson, Client Services Representative Page 10 of I, <br />