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i 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0 100 <br /> a- -N Analytical www.sequoialabs.com <br /> SECOR International-Rancho Cordova Project: Chevron 9-2396,Acampo,CA <br /> 3017 Kilgore Road,Suite 100 Project Number: 077.43485.150 Reported: <br /> Rancho Cordova CA,95670 Project Manager: Roger Hoffmore 05/16/01 15:47 <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 1050039- EPA 3050E <br /> Blank(1050039-BLKI) Prepared:05/02/01 Analyzed:05/07/01 <br /> Lead ND 2.50 mg/kg <br /> LCS(1050039-SSI) Prepared:05/02/01 Analyzed:05/07/01 <br /> Lead 49.5 2.50 mg/kg 50.0 99.0 80-120 --- — - <br /> Matrix Spike(1050039-MS1) Source: 5105016-02 Prepared:05/02/01 Analyzed:05/07/01 <br /> Lead 48.8 10.0 mglkg 50.0 ND 92.9 80-120 <br /> Matrix Spike_Dup(1050039-MSDI) Source: 5105016-02 Prepared:05/02/01 Analyzed:05/07/01 <br /> Lead 49.5 10.0 mg/kg 50.0 ND 94.3 80-120 1.42 20 <br /> Batch 1050123-EPA 3010A <br /> P" %(1050123-BLKI) Prepared:05/09/01 Analyzed:05/16/01 <br /> 1�/ ND 0.0500 mg/I <br /> LCS(1050123-BSI) Prepared:05/09/01 Analyzed:05/16/01 <br /> Lead 0.473 0.0500 mg/{ 0.500 94.6 80-120 <br /> Matrix Spike(1050123-MSI) Source: 5105074-03 Prepared:05/09/01 Analyzed:05/16/01 <br /> Lead 0.475 0.0500 mg/I 0.500 ND 95.0 80-120 <br /> Matrix Spike Dup(1050123-MSDI) Source: 5105074-03 Prepared:05/09/01 Analyzed:05/16/01 <br /> Lead 0.475 0.0500 mg/l 0.500 ND 95.0 80-120 0 20 <br /> •oia 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 he reproduced in its entirety. <br /> Page 9 of 13 <br />