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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)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 D Petaluma CA 94954 (707) 792.-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-961 2 <br /> Emcon - Pinnacle Project Arco 2168,Stockton, CA Sampled 5/25/99 <br /> 3939 Cambridge Road,Ste 202 Project Number 21775-234 004 Received 5/25/99 <br /> Cameron Park,CA 95682 Project Manager Dave Foley Reported 618/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-1 (53) S905333-01 Water <br /> Tert-butyl alcohol 9060012 6/1/99 611199 200 ND ug/I <br /> Methyl tert-butyl ether 200 308 " <br /> Di-isopropyl ether 200 540 " <br /> Ethyl tert-butyl ether 200 ND <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 1 2-DCA-d4 600-140 108 % <br /> MW-2(SZ) 5905333-02 ]Yater <br /> Tert-butyl alcohol 9060012 6/1/99 6/1/99 200 ND ugll <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND <br /> ogate 1 2-DCA-d4 60 0-140 108 <br /> Mme'-'x(5 ) 5905333-03 Water <br /> Tert-butyl alcohol 9060012 6/1/99 6/1/99 200 ND ug/l <br /> Methyl tert-butyl ether 200 10 7 " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 1,2-DCA-d4 600-140 106 <br /> MWA(58) S905333-04 Water <br /> Tert-butyl alcohol 9060012 611199 6!1199 200 212 ug/l <br /> Methyl tert-butyl ether 200 646 " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tent-butyl ether 2 00 ND " <br /> Teri-amyl methyl ether 200 ND <br /> Surrogate 12-DCA-d4 " 600-140 105 % <br /> MW-5(54) S20333-05 Water <br /> Tert-butyl alcohol 9060012 6/1/99 6/l/99 200 ND ug/I <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl cert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND <br /> AM <br /> to Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Ronald W Babel,Client Services Representative Page 4 oi9 <br />