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CALIFORNIA LABORATORY SERVICES <br /> 01/30/06 15:53 - <br /> Kleinfelder(Stockton) Project. TCN Mossdale-M6 CLS Work Order#: CPA0672 <br /> ' 2825 East Myrtle St. Project Number: 65078 <br /> Stockton CA,95205 Project Manager: Francis Bean COC#: 2533-34 <br /> Metals by EPA 200 Series Methods - Quality Control <br /> Reporting Spike Source %REC RPD <br /> i\nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CP00552-EPA 3020A <br /> Blink CP11152-BLKI) _ _ Prepared&.Analyzed:01/25/06 <br /> Arsenic ND 2.0 pg/L <br /> Lead ND 5.0 " <br /> Selenium ND 5.0 <br /> Thallium ND 1.0 <br /> LCS(CP00552-BSI) Prepared&Analyzed:01/25/06 <br /> Arsenic - _ 84.7 2.0 pg/L 100 84.7 80-120 <br /> Lead 88.2 5.0 100 88.2 80-120 <br /> Selenium 88.2 5.0 100 88.2 80-120 <br /> Thallium 89.2 1.0 100 89.2 80-120 <br /> LCS Dup(CP00552-BSDI) Prepared&Analyzed:01/25/06 <br /> .Arsenic 89.4 2.0 pg/L 100 89.4 80-120 5.40 20 <br /> Lead 93.0 5.0 100 93.0 80-120 5.30 20 <br /> Selenium 93.7 5.0 100 93.7 80-120 6.05 20 <br /> ,'I hallium 94.1 1.0 100 94.1 80-120 5.35 20 <br /> \latrix Spike(CP00552-MSI) Source: CPA0672-01 _ P_r_epared_&Analyzed:01/25/06 <br /> Arsenic - 110 2A pg/L too 7.0 103 75-125 <br /> �Lcad 96.6 5.0 100 0.27 96.3 7.5-125 <br /> Salenium 88.6 5.0 too 1.2 87.4 75-125 <br /> Thallium 100 Lo 100 ND 100 75-125 <br /> Matrix Spike Dup(CP00552-MSDI) _ - _ __Source:CPA0672-01 - Prepared&Analyzed: 01/25_/06 <br /> Arsenic 110 2.0 pg/L 100 7.0 103 75-125 0.00 25 <br /> Lead 95.6 5.0 100 0.27 95.3 75-125 1.04 25 <br /> Selenium 84.6 5.0 100 1.2 83.4 75-125 4b2 25 <br /> Thallium 99.1 1.0 100 ND 99.1 75-125 0.904 25 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> U49 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />