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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707) 792 1865 <br /> Analytical FAX(707) 792 0342 <br /> www sequoialabs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P312141 <br /> 3017 Kilgare Road Suite 100 Project Number [none] Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/22/03 14 28 <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 0/.RFC Limits RPD Limit Notes <br /> Batch 3120119-EPA 3510C <br /> Blank(3120119-BLKI) Prep red&Analyzed 12/10/03 <br /> TRPH ND 5 0 mg/l <br /> Laboratory Control Sample(3120119-BSI) Prepared&Analyzed 12/10/03 <br /> TRPH 7 27 5 0 mgll goo 91 70-130 <br /> Laboratory Control Sample Dup(3120119-BSDI) Prepared&Analyzed 12/10/03 <br /> TRPH 7 42 5 0 mg/l 8 00 93 70-130 2 30 <br /> Batch 3120201-General Preparation <br /> Duplicate(312.0201-DUPI) Source S312067-04 Prepared&Analyzed 12/03/03 <br /> pH 8 90 1 00 pH Units 8 90 0 20 <br /> equ01a 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 to its entirety <br /> Page 15 of 16 <br />