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I <br /> 819 Striker Avenue Suite 8 <br /> Sequoia <br /> Sacramento <br /> 6)9 95834 <br /> Analytical Fax(916)921-0100 <br /> www sequoialabs coin <br /> SECOR international-Rancho Cordova Project ARCO 5450,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 5450,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Mme- Rusty Benkosky 02/26/02 16 46 <br /> Total Metals by EPA 6000/1000 Series Methods -Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2020270-EPA 3050B <br /> Blank 2020270-BLKI Prepared 02/22/02 Analyzed 02/25/02 <br /> Lead ND 25 mg/kg <br /> LCS(2020270-BSI) Prepared 02/22/02 Analyzed 02/25/02 <br /> Lead 484 2 5 mglkg 500 968 80-120 <br /> Matrix Spike 2020270-MSl Source 5202277-01 Prepared 02/22/02 Analyzed 02/25/02 <br /> Lead 52 5 10 mg/kg 500 ND 918 80-120 <br /> Matrix Spike Du 2020270-MSD1) Source 5202277-01 Prepared 02/22/02 Analyzed 02/25/02 <br /> Lead 52 3 10 mg/kg 500 ND 974 80-120 0 382 20 <br /> • <br /> I <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced to its entrrery <br /> Page Page 5 of 6 <br />