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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek,CA 94598 (M)988-9600 FAX(925)988-9673 <br /> 4D $19 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX( 6)921-dY00 <br /> q„F Analytical 1455 McDowell Wd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Cambria Environmental Project EQUILON,420 Kettlemen LN Lodi,CA Sampled 1/22/99 <br /> 270 Perkins Street Project Number NIA Received 1/22/99 <br /> Sonoma,CA 95476 Project Manager Aubrey Cool Reported 1/26,27,28/99 <br /> MTBE by DHS-LUFT/Qualltty Control <br /> Sequaia..4nalytica3_-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Matrix Spike 2910296-MS3_ 5901263-16 <br /> Methyl tert-butyl ether 1/25/99 0200 0 107 0 344 mg/kg 60 0-140 119 <br /> Surrogate a a a-Trifluorotoluene 110200 0172 600-140 860 <br /> Matrix Spike Dun 9010296-MSD1 S901263- <br /> Methyl Cert-butyl ether 1/25/99 0200 0 107 0 316 mg/kg 600-140 105 250 125 <br /> Surrogate a a a-Tris luorotoluene 0200 0172 600-140 860 <br /> i <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of nates and deft s <br /> f17 <br /> Sandra R Hanson,Client Services Representative <br /> Page 23 of 27 <br />