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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 Swte 8 Sacramento CA 95834 (916)9Z1-9600 FAX(916)9Z 1-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> t 551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> mcon-Cameron Park Project ARCO 6020 Manteca,Ca Sampled 6/2/99 <br /> 3939 Cambridge Road,Ste 202 Project Number N/A Received 612/99 <br /> ameron Park,CA 95682 Project Manager Joel Coffman Reported 6/3/99 <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 /> 7Analyte Analyzed Level Result Result Units Recov Limits % Limit % blot's* <br /> Latch, 9060046 Date Pre_nared. 6/2/99 Extraction Method. EPA 3050B <br /> $lank 9060046-BLK1 <br /> Lead 6/3/99 ND mg/kg 250 <br /> L9060046-BSI <br /> Lead 6/3/99 500 478 mg/kg 800-120 95 6 <br /> 9060046-MSI 5906412-03 <br />"Lead 6/3/99 500 238 275 mg/kg 800-120 740 <br /> l,D <br /> 9060046-MSD I 5906012-03 <br /> ead 6/3/99 Soo 238 275 mg/kg 800-120 740 200 0 I,D <br /> equoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 5 of 6 <br /> onald W Bobel,Client Services R resentative <br />