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• Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wlget 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 /> Blaine Tech/Chevron Project Chevron Sampled 3/5/99 <br /> 1680 Rogers Ave Project Number 9-8264/990305-J3 Received 3110/99 <br /> San Jose,CA 951 12 Project Manager Chnstine Lillie Reported 4/5/99 <br /> Dissolved Metals by EPA 6000/7000 Series Methods/Quality Control <br /> Sequoia Analytical- Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> IAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9030262 Date Prepared 3/15199 Extraction Method EPA 3010A <br /> Blank 9030262-BLK1 <br /> Calcium 3115/99 ND ug/I 1000 <br /> Chromium ND 100 <br /> Lead ND 750 <br /> Nickel ND 300 <br /> Zinc ND 200 <br /> LCS 9030262-BSI <br /> Calcium 3/15/99 5000 5260 ug/l 800-120 105 <br /> Chromium 500 517 800-120 103 <br /> Lead 500 539 800-120 108 <br /> Nickel 500 526 800-120 105 <br /> Zinc 500 525 800-120 105 <br /> Matrix Spike 9030262-MSI P903123-01 <br /> Calcium 3/15/99 5000 29900 34900 ug/I 75 0-125 100 <br /> Chromium 500 186 487 75 0-125 93 7 <br /> Lead 500 ND 495 75 0-125 990 <br /> Nickel 500 340 514 75 0-125 96 0 <br /> Zinc 500 44 1 557 75 0-125 103 <br /> Matrix Spike Dup 9030262-MSD1 P903123-01 <br /> Calcium 3/15199 5000 29900 34800 ug/l 75 0-125 98 0 200 2 02 <br /> Chromium 500 18 6 482 75 0-125 927 200 1 07 <br /> Lead 500 ND 475 75 0-125 950 200 4 12 <br /> Nickel 500 34 0 512 75 0-125 956 200 0 418 <br /> Zinc 500 44 l 538 75 0-125 988 200 4 16 <br /> Sequoia Analytical - Petaluma - *Refer io end of report for text of notea and def nmons <br /> I <br /> Page 12 of 23 j <br />