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680 Chesapeake Drive Redwood Ciry 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 /> Analytical <br /> ������L L�� 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-5640 FAX(916)921 0100 <br /> 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 3/11/99 <br /> 1680 Rogers Ave Project Number 341 East Main St,Ripon/99031 I-Li Received 3115/99 <br /> San Jose,CA 95112 Project Manager Fran Thie Reported 3126/99 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits IN, Limit % Notes* <br /> Batch 9030598 Date Pre ared 3124199 Extraction Method EPA 5030 waters <br /> Blank 9030598-BLKI <br /> Methyl tert-butyl ether 3/24199 ND ug/1 0 500 <br /> Surrogate Dibromofluoromethane 11500 4 75 860-118 95 0 <br /> Blank 9030598-BLK2 <br /> Methyl tert-butyl ether 3/25199 ND ugll 0 500 <br /> Surrogate Dibromofluoromethane It 500 484 It 860-118 968 <br /> LCS 9030598-BSI <br /> Methyl tert-butyl ether 3124199 500 5 16 Ug/1 700-130 103 <br /> Surrogate Dibromofluoromethane 500 490 IF 860-118 98 0 <br /> LCS 9030598-13S2 <br /> Methyl tert-butyl ether 3/25/99 500 <br /> 5 12 ug/l 72 7-119 102 <br /> 0arrogate Dibromofluoromethane 11 500 506 860-118 101 <br /> trtx Spike 9030598-MS1 P903618-02 <br /> Methyl tert-butyl ether 3124/99 500 ND 5 19 ugll 700-130 104 <br /> Surrogate Dibromofluoromethane 0500 511 00860-118 102 <br /> Matrix Spike Dug 9030598-MSDI P903618-02 <br /> Methyl.tent-butyl ether 3/24199 500 ND 5 15 ug/1 700-130 103 150 0 966 <br /> Surrogate Dibromofluoromethane 500 5 02 IF 860-118 100 <br /> uota Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 8 of 9 <br />