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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> ID (707)792-1665 <br /> qW Analytical FAX(707)792-0342 <br /> www scquotalabs com <br /> Secor-Rancho Cordova Project Arco Site 2133 P306554 <br /> 3017 Kilgare Road Suite 100 Project Number 38982 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/02/03 18 02 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3070034-EPA 5030 waters <br /> Blank(3070034-BLKI) Prepared&Analyzed 07/01/03 <br /> Methyl tert-butyl ether ND 0 50 ug/1 <br /> Surrogate Dibromofluoromethane 4 30 500 86 84-122 <br /> Laboratory Control Sample(3070034-BSI) Prepared&Analyzed 07/01/03 <br /> Methyl tert-butyl ether 455 0 50 ug/l 5 00 91 77-123 <br /> Surrogate Dthromofluoromethane 429 115 00 86 84-121 <br /> Matnx Spike 3070034-MS1 Source P306566-04 Prepared 07/01/03 Analyzed 07/02/03 <br /> Methyl tert-butyl ether 246 25 ug/l 250 ND 98 77-123 <br /> Surrogate Dibromofluoromethane 447 " 5 00 89 84-122 <br /> Matrix Spike Du (3070034-MSD1) Source P306566-04 Prepared 07/01/03 Analyzed 07/02/03 <br /> Methyl tert-butyl ether 247 25 ug/l 250 ND 99 77-123 0 4 20 <br /> arrogate DihromoJluoromethane 443 11 500 89 84-122 <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 /> basis This analytical report must be reproduced in its entirety <br /> Page 10 of 11 <br />