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' • . 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento, <br /> )9 95834 <br /> (916)921-96009600 <br /> (& <br /> Analytical FAX(916)921-0100 <br /> ' www.sequoialabs.com <br /> URS-Sac,Gateway Oaks Project: ARCO 760,Lodi,CA <br /> ' 2870 Gateway Oaks Dr.,Ste.300 Project Number: 760,Lodi,CA Reported: <br /> Sacramento CA,95833 Project Manager. Vernon Elarth 08/27/02 16:38 <br /> Total Metals by EPA 6000/7000 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 2080247-EPA 3050B <br /> Blank(2080247-BLK1) Prepared&Analyzed:08/26/02 <br /> Lead ND 2.5 mg/kg <br /> LCS(2080247-BS1) Prepared&Analyzed:08/26/02 <br /> Lead 50.4 2.5 mg/kg 50.0 101 80-120 <br /> Matrix Spike(2080247-MS1) Source:S208204-09 Prepared&Analyzed:08/26/02 <br /> Lead 50.7 25 mg/kg 50.0 ND 101 80-120 <br /> ' Matrix Spike Dup(2080247-MSDI) Source:5208204-09 Prepared&Analyzed:08/26/02 <br /> Lead 50.3 25 mg/kg 50.0 ND 101 80-120 0.8 20 <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 /> ' Page Page 6 of 7 <br />