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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)986-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92 1-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> mqW1551 Industrial Road San Carlos CA 94070-4111 (650)232-%W FAX(650)232 9612 <br /> r <br /> Emcon-Cameron Park Project ARCO 6020 Manteca,Ca Sampled 5/17/99 <br /> 3939 Cambridge Road,Ste 202 Project Number N/A Received 5/17/99 <br /> Cameron Park,CA 95682 Project Manager Joel Coffman Reported 5/18/99 <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. 9050162 Date Prepared-5117/99 Extraction Method, EPA 3050E , <br /> Blan$ 9050162-BLK1 <br /> Lead 5/17/99 ND mg/kg 250 <br /> l.CS 9Q5Q1fi2-fl1.91 <br /> Lead 5/17/99 500 50 9 mg/kg 800-120 102 <br /> Matrix Spike 9050162-MSI S905178-09 <br /> Lead 5/17/99 500 ND 525 mg/kg 800-120 105 D <br /> Matrix Spike Dun 9050162-MSDI S905178-09- <br /> Lead 5/17/99 500 ND 51 9 mg/kg 800-120 104 200 0 957 D <br /> p <br /> Sequoia Analytical -Sacramento / *Refer to end of report for text of notes mid definitions <br /> Ronald W Bobel,Client Services Representative Page 6 of 9 1 <br />