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, <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364-9�33 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988-%73 <br /> 819 Stnker Avenue Suite 8 Sacramento CA 95834 (9t6)921 9600 FAX(916}92 1-0 100 <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 41 1 1 (650)232 9600 FAX(650)232 9612 <br /> EMCON-Sac Project ARCO 2130,Stockton,CA Sampled 3/31/99 <br /> 1433 N Market Blvd Project Number 21775-229 004 Received 4/1/99 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 4/[5/99 <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--Lal) 5904029-01 <br /> Tert-butyl alcohol 9040103 4/8/99 418/99 200 ND ug/1 <br /> Methyl tert-butyl ether " 200 ND " <br /> DI-Isopropyl ether 200 ND <br /> Ethyl tert-butyl ether 200 ND " <br /> Teri-amyl methyl ether 200 ND " <br /> Surrogate 12-DCA-d4 600-140 120 <br /> MW--Z(72) 5904029-02 ter <br /> Wa <br /> Tert-butyl alcohol 9040103 4/8/99 4/8/99 200 ND Wa <br /> ATethyE tert-butyl ether 200 590 " <br /> DI-Isopropyl ether " " " 100 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> SAW,te 12-DCA-d4 600-140 110 <br /> MW-3(73) S204029-0 i-0 i I ter <br /> Tert-butyl alcohol 9040103 418199 4/8199 200 ND ug/E <br /> Methyl tett-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 /> Surrogate 12-DCA-d4 600-140 114 <br /> NINX73 S204022-04 ter <br /> Wa <br /> Tert butyl alcohol 9040103 4/8/99 418/99 200 ND watt <br /> Methyl ten-butyl ether 200 ND <br /> DI-Isopropyl ether 200 ND " <br /> Ethyl tent-butyl ether 200 ND <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate l 2-DCA d4 600-140 113 <br /> yu <br /> MW-5(751 5904029-05 Water <br /> Ten-butyl alcohol 9040103 4/8199 4/8/99 200 ND ug/I <br /> Methyl tert-butvl ether 2 00 494 <br /> DI Isopropyl ether 200 ND <br /> Ethyl tert-butyl ether 2 00 ND <br /> t <br /> SegLWAnalytical-Sacramento <br /> h Refer to end ofrep� (for text ofilul, T <br /> U � <br /> tonald W Bobel,Client Services Representative Page 4 of 9 <br />