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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma,(707)792 1865 <br /> i Analytical FAX equot labs co 2 <br /> www sequnialabs coin <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P406416 <br /> 3017 Kilgare Road Suite 100 Project Number WR 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/14/04 16 40 <br /> DRAFT: Purgeables by EPA Method 624- Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %aREC RPO <br /> Analyte Result Limit Units Level Result %aREC Limits RPD Limit Notes <br /> Batch 4070008-EPA 5030B waters <br /> Matrix Spike(4070008-MSI) Source P406416-01 Prepared&Analyzed 07/01/04 <br /> Tnchloroethene 203 10 ugA 200 ND 102 71-157 <br /> Trichlorofluoromethane 224 10 200 ND 112 17-181 <br /> Vinyl chlonde 187 1 0 200 ND 94 O 1-251 <br /> Surrogate Dibromofluoromethane 602 500 120 84-112 <br /> Surrogate 12-Dichloroethane-d4 606 Soo 121 74-135 <br /> Surrogate Toluene-d8 535 500 107 84 119 <br /> Surrogate 4-Bromofluarobenzene 530 500 106 86-119 <br /> DRAFT REPORT The results m this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its enitrery . <br /> Page 14 of 20 <br />