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Sequoia 680 Chesapeake Drive "edwood 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%73 <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 /> 1551 Industrial Road San Carlos CA 94070-411 1 (650) 232-9600 FAX(650)232-9612 <br /> SECOR International Project ARCO 2133, Stockton,CA Sampled 3/18/99 <br /> 9912 Business Park Drive, Ste 100 Project Number 7G600-019-04 Received 3/18/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/23/99 <br /> Total Metals by EPA 6000/7000 Series Methods/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch, 4030268 Extraction Method. EPA 30EM <br /> Blank 9030268-BLK 1 <br /> Lead 3/23/99 ND mg/kg 250 <br /> 1&S 9030268-BSI <br /> Lead 3/23199 500 48 6 mg/kg 800-120 972 <br /> Matrix Spike 9030268-M__S_1 5903252-02 <br /> Lead 3123/99 500 ND 52 l mg/kg 800-120 104 D <br /> Matrix Spike Duo 9030268-MSDI 5903252-02 <br /> Lead 3/23/99 500 ND 51 5 mg/kg 800-120 103 200 0 966 D <br /> • <br /> oia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> r 2(j,-/ <br /> Sandra R Hanson,C lent e'Vices Representative Page 6 of 9 <br />