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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N \Niger Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Sequoia-RC(Subbed In) Project Mei Mei Shin Sampled 2/17/99 <br /> 680 Chesapeake Dr Project Number 9902842 Received 2/19/99 <br /> Redwood City,CA 94063 Project Manager Mei Mei Shin Reported 314/99 <br /> Total Metals by EPA 6000/7000 Series Methods/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9020492 Date Prepared 2/26/99 Extraction Method EPA 3010A <br /> Blank 9020492-BLK1 <br /> Cadmium 3/2/99 ND ug/l 100 <br /> Chromium ND 100 <br /> Nickel ND 30 0 <br /> Zinc ND 200 <br /> LCS 9020492-BS1 <br /> Cadmium 3/2/99 50 0 51 8 ug/l 80 0-120 104 <br /> Chromium 500 509 800-120 102 <br /> Nickel 500 509 800-120 102 <br /> Zinc 500 )31 800-120 106 <br /> Matrix Spike L020492-MS] P902438-01 <br /> Cadmium 3/2/99 500 ND 473 ug/l 75 0-125 94 6 <br /> hromium 500 ND 455 75 0-125 91 0 <br /> Jickel 500 ND 455 " 75 0-125 91 0 <br /> Zinc 500 ND 482 75 0-125 964 <br /> Matrix Spike Dup 9020492-MSD1 P902438-01 <br /> Cadmium 3/2/99 500 ND 47 1 ug/1 75 0-125 942 20 0 0 424 <br /> Chromium 500 ND 466 75 0-125 93 2 20 0 239 <br /> Nickel 500 ND 469 75 0-125 93 8 20 0 303 <br /> Zinc 500 ND 505 75 0-125 101 20 0 466 <br /> Batch 9020533 Date Prepared 2/24199 Extraction Method EPA 3020A <br /> Blank 9020533-BLK1 <br /> Lead 2/25/99 ND ug/l 500 <br /> LC S 9020533-BS 1 <br /> Lead 2/25/99 50 0 38 9 ug/l 800-120 77 8 <br /> Matrix Spike 9020533-MSI P902376-01 <br /> Lead 2125/99 500 192 43 1 ug/l 75 0-125 478 1 <br /> Matrix Spike Dun 9020533-MSDI P902376-01 <br /> Lead 2/25/99 50 0 192 44 l ug/l 75 0-125 498 200 4 10 1 <br /> Am <br /> equoia Analytical - Petaluma *Refer to end of report for te-rt of notes and definitions <br /> Page 5 of 9 <br />