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• 819 Striker Avenue,Suite 8 <br /> Seuoia Sacramento, 95834 <br /> q (916))921-9600 <br /> Analytical FAX equoi labs.c 00 <br /> www.sequoialabs.com <br /> Stratus Environmental Project: ARCO 760,Lodi,CA <br /> 3330 Cameron Park Drive,Ste.550 Project Number: 760,Lodi,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 08/22/02 14:11 <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 2080144-EPA 3050B <br /> Blank(2080144-BLKI) Prepared&Analyzed:08/16/02 <br /> Lead ND 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 /> Matrix Spike(2080144-MS1) Source:S208200-03 Prepared&Analyzed:08/16/02 <br /> Lead 57.2 10 mg/kg 50.0 11 92 80-120 <br /> ' Matrix Spike Dup(2080144-MSD1) Source: 5208200-03 Prepared&Analyzed:08/16/02 <br /> Lead 57.8 10 mg/kg 50.0 11 94 80-120 1 20 <br /> Batch 2080198-EPA 3050B <br /> Blank(2080198-BLK1) Prepared&Analyzed:08/21/02 <br /> Lead ND 2.5 mg/kg <br /> LCS(2080198-BSI) Prepared&Analyzed:08/21/02 <br /> Lead 49.2 2.5 mg/kg 50.0 98 80-120 <br /> Matrix Spike(2080198-MSl) Source:5208200-04 Prepared&Analyzed:08/21/02 <br /> Lead 52.0 10 mg/kg 50.0 ND 97 80-120 <br /> Matrix Spike Dup(2080198-MSDI) Source:5208200-04 Prepared&Analyzed:08/21/02 <br /> Lead 52.3 10 mg/kg 50.0 ND 97 80-120 0.6 20 <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 in its entirety. <br /> Page Page 9 of I 1 <br />