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Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma, CA 94954 <br /> 0 Analytical (707)792 1342 <br /> FAX equo labs c 42 <br /> www sequaia]abs coin <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P311302 <br /> 3017 K119are Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95570 Project Manager Rusty Benkosky 12/01/03 15 25 <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 3110215-General Prep <br /> Du Ilcate3110215-DUPI) Source S311214-01 Pre ared&Anal zed 11/13/03 <br /> pH 7 30 1 00 pH Units 7 28 0 3 20 <br /> Batch 3110325-EPA 3510C <br /> Blanks 3110325-BLK1 Prepared 11/24/03 Analyzed 11/25/03 <br /> TRPH ND 5 0 mgll <br /> Laboratory Control Sample3( 110325-BSI) _ Prepared 11/24/03 Analyzed 11/25/03 <br /> TRPH 8 18 5 0 tngfl goo 102 70-130 <br /> Laboratory Control Sample Du 3110325-BSDI Prepared 11/24/03 Analyzed 11/25/03 <br /> TRPH 8 18 5 0 mgll 800 102 70-130 0 30 <br /> �equoia 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 14 of 15 <br />