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�n <br /> A <br /> 885 Jarvis Dn e <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)766-9600 <br /> iW Analytical FAX(406)782-6308 <br /> www sequoialabacom <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MMH0356 <br /> 3017 Kilgore Rd Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Clint Harms 08/12/03 16 36 <br /> Total Metals by EPA 6000/7000 Series Methods -Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %nREC Luntts RPD Lnwt Notes <br /> Batch 3H12012-EPA 3050B <br /> Blank(3H12012-BLKI) Prepared&Analyzed 08/12/03 <br /> Lead ND 5 0 mg/kg <br /> Laboratory Control Sample(3H12012-BSI) Prepared&Analyzed 08/12/03 <br /> Lead 505 50 mg/kg 500 101 76 117 <br /> Matrix Spike(3H12012-MSI) Source MMH0356-01 Prepared&Analyzed 08/12/03 <br /> Lead 540 50 mg/kg 500 11 860 76-117 <br /> Matrix Spike Dup(3H120I2-MSD1) Source MMH0356-01 Prepared&Analyzed 08/12/03 <br /> Lead 536 50 mg/kg 500 11 852 76-117 0 743 20 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chane of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety 0 <br /> 6of7 <br />