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819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> L Sequoia v ~ (916)921-9600 <br /> Analtical PAX(916)921-0100 <br /> y www.sequoialabs.s-com <br /> com <br /> Stratus Environmental project: ARCO 434,Lodi,CA <br /> 3330 Cameron Park Drive,Ste.550 Project Number. 434,Lodi,CA Reported: <br /> L Cameron Park CA,95682 Project Manager: Jay Johnson 08/19/02 14:41 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> L Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Nates <br /> Batch 2080144-EPA 3050B <br /> Blank(2080144-BLKI) Prepared&Analyzed:08/16/02 <br /> L Lead No 2.5 mg/kg <br /> LCS(2080144-BS1) Prepared&Analyzed:08/16/02 <br /> Lead 50.8 2.5 mg/kg 50.0 102 80-120 <br /> ]r <br /> Matrix Spike(2080144-MS1) Source:5208200-03 Prepared&Analyzed:08/16/02 <br /> Lead 57.2 10 mg/kg 50.0 II 92 80-120 <br /> j% Matrix Spike Dup(2080144-MSD1) Source:S208200-03 Prepared&Analyzed:08/16/02 <br /> Lead 57.8 10 mg/kg 50.0 Il 94 80-120 1 20 <br /> L <br /> L <br /> L <br /> L <br /> L <br /> L <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> L <br /> 1 Page Page 6 of 8 <br /> ■. <br />