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Sequoia 1455 McDowell Blvd,North Ste <br /> Petaluma CA 949544 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P401156 <br /> 3017 Kilgare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/27/04 15 26 <br /> Conventional Chemistry Parameters by APHA/EPA 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 4010207-EPA 35100 <br /> Blank 4010207-BLK1 Prepared 01/19/04 Analyzed 01/20/04 <br /> TRPH ND 5 0 mg/I <br /> Laboratory Control Sam ie(4010207-BS1) Prepared 01/19/04 Analyzed 01/20/04 <br /> TRPH 773 50 mg/I 8 00 97 70-130 <br /> Laboratory Control Sample D_Up14010207-B5D1) Prepared 01/19/04 Analyzed 01/20/04 <br /> TRPH 773 5 0 mg/I 8 00 97 70-130 0 30 <br /> I <br /> •Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> bases This analytical report must be reproduced in its entirety <br /> Page 15 of 16 <br />