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.} c <br /> Y� 1455 NEcDow <br /> Sequoia Petaluell Blvd,North Ste ma,CA 449544 <br /> (797)792-132 <br /> VWAnalytical FAX(707)792-03442 <br /> www sequoialabs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P307150 <br /> 3017 K.ilgare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/23/03 16 39 <br /> Conventional Chemistry Parameters by APHAIEPA 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 3070172-EPA 3510C <br /> Blank(3070172-BLKI) Prepared&Analyzed 07/14/03 <br /> TRPH ND 5 0 - mg/1 ._ <br /> Laboratory Control Sample(3070172-BSI) Prepared&Analyzed 07/14/03 <br /> TRPH 7 57 5 0 mg/l 800 95 70-130 <br /> Laboratory Control Sample Dup(3070172-BSD1) Prepared&Analyzed 07/14/03 <br /> TRPH 7 42 5 0 mg/l goo 93 70-130 2 30 <br /> Batch 3070266-General Preparation <br /> Duplicate 3070266-DUP1 Source S307143-02 Pre ared&Analyzed 07/08/03 <br /> PH 102 1 00 pH Units 10 2 0 20 <br /> equota 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 /> basis This analytical report must be reproduced in Its entirety <br /> Page 15 of 16 <br />