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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94596 (925)988 9600 FAX(925)988-9673 <br /> 14k-0 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> E455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> • <br /> Emcon -Cameron Park Project IBC-Stock(on Sampled 1 1/9/98 <br /> 3939 Cambridge Road,Ste 202 Project Number 22605-101 003 Received 11/10/98 <br /> Cameron Park,CA 95682 Project Manager Mark Caps Reported 11/24/98 <br /> VOlatlle Organic Compounds by EPA Method 8260A/Quality 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. 8110750 Rate erepared 1112Q/98 Extraction Method, EPA„S030DIp Tl <br /> Blank 81 10250-3LKI <br /> Ethanol 11/20/98 ND ug/I 3000 <br /> cert-butyl alcohol ND 200 <br /> vlethyl tent-butyl ether ND 2 00 <br />)i-isopropyl ether ND " 200 <br />,thy] tert-butyl ether ND 2 00 <br /> Pert-amyl methyl ether ND 200 <br /> surrogate 12-DC4-d4 500 Sl 7 600-140 103 <br /> X-S 8110250-BSI <br /> Methyl ten-butyl ether 11/20/98 500 48 6 ugll 700 130 972 <br /> urrogate 12 DCA-d4 11 500 48 4 600 140 96 8 <br /> $1102. 1 5811242-0I <br /> tert-butyl ether 11/20/98 500 75 1 51 9 ug/l 600-140 NR 2 <br /> urrogate 12-DCA-d4 SO 0 514 600-140 103 <br /> 7atrix Spike Duo 8110250-MSD1 S811249-01 <br /> lethyl tert-butyl ether 11/20/98 500 75 1 116 ug/I 600-140 81 8 25 0 NR 2 <br /> urrogate 1 2-DCA-d4 500 42 0 600-140 840 <br /> quota Analytical-Sacramento *Refer to end of report far text ofnotes and definitions <br /> r J �. <br /> nald W Babel Client Services Representative Page 5 of 6 <br />