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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 94598 (925)988-9600 FAX(925)988-9673 <br /> � � 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9 21-0100 <br /> ti c al 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 1/14199 <br /> 1680 Rogers Ave Project Number 341 East Main-Ripon/P990114-Y3 Received 1/19/99 <br /> San Jose,CA 95112 Project Manager Fran Thie Reported 3/15/99 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Lirnit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9020351 Date Pre ared 2116/99 Extraction Method EPA 5030 waters <br /> Blank 9020351-BLKI <br /> Methyl tert-butyl ether 2116/99 ND ug/1 0 500 <br /> Surrogate Dibromofluoromethane If -300 499 860-118 99 8 <br /> Blank 9020351-BLK2 <br /> Methyl tert-butyl ether 2/18/99 ND ug/1 0 500 <br /> Surrogate Dibromofluorornethane 1, 5 00 530 860-118 106 <br /> LCS 9020351-BSI <br /> Methyl tert-butyl ether 2/16/99 5 00 457 ug/1 700-130 914 <br /> Surrogate Dibromofluoromethane 500 515 If <br /> 860-118 103 <br /> LCS 9020351-BS2 <br /> Methyl tert-butyl ether 2/18/99 500 485 ug/l 700-130 970 <br /> 40rogate Dibromofluoromethane 5 00 540 860-118 108 <br /> Matrix Spike 9020351-MS1 P902178-03 <br /> Methyl tert-butyl ether 2/16/99 5 00 0 856 562 Ug/l. 700-130 953 --- <br /> Surrogate <br /> Surrogate Dibromofluoromethane 5 00 518 01 860-118 104 <br /> Matrix Spike Du u 9020351-MSD/ P902178-03 <br /> Methyl tert-butyl ether 2116/99 5 00 0 856 5 81 ug/1 700-130 991 150 391 <br /> Surrogate Dibromofluoromethane 5 00 527 860-118 105 <br /> AMk <br /> uola Analytical-Petaluma 1 " - - *Refer to end of report for text of notes and definitions <br /> LIAR 1 5 1999 ' <br /> ' ; Page 5 of 6 <br />