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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233PJ <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Aaytica 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> y s1" 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Technical Services,Inc Project Shell Oil Co Sampled 1/28/99 <br /> 1680 Rogers Ave Project Number 341 E Main St,Ripon/990128-J3 Received 2/2/99 <br /> San.lose,CA 95112 Project Mana er Fran Thie Reported 2/18/99 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> - - - -'Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Linut Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Linut % Notes* <br /> Batch 9020294 Date Prepared 2/11!99 Extraction Method EPA 5030 waters <br />__Blank 9020294-BLKI <br /> Methyl tert-butyl ether 2/11/99 ND ug/l 0 500 <br /> Surrogate Dibromofluoromethane " 500 493 86 0-118 98 6 <br /> Blank 9020294-BLK2 <br /> Methyl tert-butyl ether 2/12199 ND ug/l 0 500 <br /> Surrogate Dibromofluoromethane Soo 539 860-118 108 <br /> Blank 9020294-BLK3 <br /> Methyl tert-butyl ether 2112/99 ND ug/1 0 500 <br /> Surrogate Dibromofluoromethane or 500 507 860-118 101 <br /> LCS 9020294-BSI <br /> Methyl tert-butyl ether 2/11/99 500 497 ug/l 700-130 994 <br /> Surrogate Dibromofluoromethane 11500 542 860-118 108 <br /> LCS 9020294-BS2 <br /> Methyl tert-butyl ether 2112199 500 530 ug/l 700-130 106 <br /> Surrogate Dibromofluoromethane 500 522 fl860-118 104 <br /> LCS 9020294-BS3 <br /> Methyl tert-butyl ether 2/12199 500 480 ug/l 700-130 96 0 <br /> Surrogate Dibromofluoromethane " 500 5 06 860-118 101 <br /> Matrix Spike 9020294-MSI P902125-05 <br /> Methyl tert-butyl ether 2/11/99 500 ND 5 07 ug/I 700-130 101 <br /> Surrogate Dibromofluoromethane " 500 522 860-118 104 <br /> Matrix Spike Dup 9020294-MSD1 P902125-05 <br /> Methyl tert-butyl ether 2/11/99 500 ND 478 ug/1 700-130 956 150 549 <br /> Surrogate Dibromofluoromethane 500 534 860-118 107 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text ofnotes and definitions . <br /> Page 5 of 6 <br />