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Sequoia t8 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 6) 404 cN Wiget Lane walnut Creek CA 94598 (9Z5)988-9600 FAX(9,Z5)988-9073 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-otoo <br /> 11W Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342_ <br /> Cambna Environmental Project EQUILON,420 Kettlemen LN Lodi,CA Sampled 214199 <br /> 270 Perkins Street Project Number N/A Received 214199 <br /> Sonoma,CA 95476 Project Manager Mike Murphy Reported 215,9, 11/99 <br /> Volatile Organic-Compounds by EPA Method 8260AIQuality 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. 9020110 to Prepared. 215199 Extraction Method EPA 503QB [MeOHI <br /> Blank 942 Qll0-BLK1 <br /> Tert-butyl alcohol 2/8/99 ND mg/kg 100 <br /> Methyl tent-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 1 2-DCA-d4 2 50 224 600-140 896 <br /> LSA 9020110-BS1 <br /> Methyl tert-butyl ether 218/99 2 50 236 mg/kg 700-130 944 <br /> Surrogate 12-DCA-d4 11 250 231 600-140 924 <br /> Matrix Spike 9020110-MSl 5902058-01 <br /> Methyl tert-butyi ether 218199 2 50 ND 226 mg/kg 600-140 904 _ <br /> Surrogate 12-DCA-d4 2 50 223 600-140 892 <br /> Matrix Spike Duv 9020110-iimSDl 5902058-01 <br /> Methyl Cert-butyl ether 218199 2 50 ND 209 mg/kg 600-140 83 6 25 0 7 82 <br /> Surrogate r 7-DC 1-d4 2 S0 2 1; 600-140 84 4 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and defin12 <br /> a <br /> c <br /> C <br /> Sandra R Hanson, Client Services Representative page 9 of 10 <br />