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680 Chesapeake Drive Redwood City,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 /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)92 1-0 100 <br /> Analy1455 <br /> nllNorth.Ste. D aluma,CA 94954 (707) 792-1865 FAX(707)Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-961 <br /> tical 1551 Industrial Road San <br /> 2 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 4/13/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number; N/A Received: 4/14/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 4/28/99 <br /> Total Metals by EPA 6000/7000 Series Methods <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Specific Reporting <br /> Analyte Number Prepared Analyzed Method Limit Result Units Notes" <br /> XL-11X21 S904203-03 S" <br /> Cadmium 9040225 4/20/99 4/21/99 EPA 6010A 1.00 ND mg/kg D <br /> Chromium EPA 6010A 1.00 23.6 D <br /> Lead EPA 6010A 10.0 21.5 D <br /> Nickel EPA 6010A 4.00 27.8 D <br /> Zinc EPA 6010A 2.00 48.8 D <br /> XL-2&9' 5904203-04 SAW <br /> Cadmium 9040225 4/20/99 4/21/99 EPA 6010A 2.50 ND mg/kg D <br /> Chromium EPA 6010A 2.50 53.3 D <br /> Lead EPA 6010A 25.0 ND D <br /> Nickel EPA 601 OA 10.0 42.4 D <br /> Zinc EPA 6010A 5.00 69.6 D <br /> quoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative page 4 of 19 <br />