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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)921-0100 <br /> 14%ff Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Pinnacle-C P Project ARCO 6020,Manteca,CA Sampled 5/11/99 <br /> 3939 Cambridge Road,Ste 220 Project Number NIA Received 5111199 <br /> Cameron Park,CA 95682 Project Manager Joel Coffman Reported 5112/,5/13/99 <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. 9050143 Date Prepared. 5113199 Extraction Method, EPA 3050B <br /> Blank 9050143-BLK1 <br /> Lead 5/13199 ND mg/kg 250 <br /> LCs 9050143-BS1 ' <br /> I <br /> Lead 5/13199 500 49 1 mg/kg 80 0420 982 <br /> Matrix Spike 9050143-MS1 5905096-07 , <br /> Lead 5/13/99 500 ND 478 mg/kg 800-120 956 D <br /> Matrix Spike Dnp 9050143-MSD1 S905096-07 <br /> Lead 5/13/99 500 ND 504 mg/kg 800-120 101 200 549 D <br /> a <br /> Sequoia Analytical-Sacramento /I *Refer to end of report for text of noses and dei mutons 4 <br /> , ` <br /> Ronald W Bobel,Client Services Representative Page 6 of 9 <br />