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Sequoia • • 819 Stnker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> 5 Analytical FAX(916)921-0 100 <br /> SECOR International Project ARCO 434, Lodi,CA Sampled 6/18199 <br /> 9912 Business Park Drive,Ste 100 Project Number NIA Received 7/8199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 7/19/99 <br /> Total Metals by EPA 6000/7000 Serres 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 9070203 Date Prepared. 7/14/99 Extraction Method, EPA 3050B <br /> Blank 9079293-OLKI <br /> Lead 7/19/99 ND mglkg 2 50 <br /> LES 9070203-BSI <br /> Lead 7/19/99 500 488 mg/kg 800-120 976 <br /> Matrix Spike 9070203-MS1 5907118-21 <br /> Lead 7/19/99 500 ND 48 7 mg/kg 800-120 974 D <br /> Matrix Spike Dun 2Q7O2Q3-MSD1 $207118-2I <br /> Lead 7/19/99 Soo ND 485 mg/kg 800-120 970 200 0 412 D <br /> Sequoia Analytical-Sacramento *Refer to end of report for text ofnoles and definitions <br /> Page 6 of 8 <br />