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Sequoia 680 Chesapeake Drive Redwood City.CA 94063 —(650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue.Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-0100 <br /> a) <br /> Analytical 1455 McDowell Blvd.North.Ste.D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> SECOR[ntemational Project: ARCO 434,Lodi,CA Sampled: 11/2/98 <br /> 9912 Business Park Drive,Ste. 100 Project Number: 7G600-037-01 Received: 11/2/98 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 11/16/98 <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 /> Analytc Analyzed Level Result Result Units Recov. Limits % Limit % Notes• <br /> Batch: 8110058 Date Prepared: I I/5/98 Extraction Method- EPA 30506 <br /> Blank 8110058-BLKI <br /> Lead 11/6/98 ND mg/kg 2.50 <br /> LCS 8110058-BSI <br /> Lead 11/6/98 50.0 50.3 mg/kg 80.0-120 101 <br /> Matrix Spike 8110058-MSI 5811011-01 <br /> Lead 11/6/98 50.0 10.3 50.3 mg/kg 80.0-120 80.0 <br /> Matrix Spike Duo 8110058-MSD] 5811011-01 <br /> Lead 11/6/98 50.0 10.3 50.5 mg/kg 80.0-120 80.4 20.0 0.499 <br /> S/daC. <br /> lytical•Sacramento <br /> -Refer to end of report for text of notes and definitions. <br /> 1neider, aboratory Director Page 5 of 6 <br /> / nc� <br />