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CALIFORNIA LABORATORY SERVICES <br /> 05/12/06 15:32 <br /> Dunn Environmental Project: Riverbank WWTP CLS Work Order ft: CPE0196 <br /> 5060 Robert J.Mathews, Ste 2 Project Number: 109-06 <br /> El Dorado Hills,CA 95672 Project Manager: Jaco Fourie COC#:None <br /> Trihalomethanes by EPA Method 524.2 <br /> Reporting <br /> r Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Not <br /> MW-10(CPE0196-01)Water Sampled:05/04/06 10:30 Received: 05/04/06 15:55 <br /> Bromodichloromethane ND 0.50 µg/L I CP03424 05/05/06 05/05/06 EPA 5242 <br /> Bromoform ND 0.50 " <br /> Chloroform ND 0.50 <br /> Dibromochloromethane ND 0.50 " <br /> a Total Trihalomethanes(THM) ND 0.50 " <br /> Surrogate: 1,2-Dich/oroethane-d4 121 % 66-135 " <br /> Surrogate: Toluene-d8 82.1 % 70-130 <br /> Surrogate:4-Bromo luorobemene 120% 70-130 <br /> MW-11 (CPE0196-02)Water Sampled: 05/04/0611:15 Received:05/04!0615:55 <br /> Bromodichloromethane ND 0.50 µ@/L 1 CP03424 05/05/06 05/05/06 EPA 524.2 <br /> Bromoform ND 0.50 1 " " <br /> Chloroform ND 0.50 <br /> r Dibromochloromethane ND 0.50 " <br /> Total Trihalomethanes(THM) NO ' 0.50 " <br /> Surrogate: 1,2-Dichloroethane-d4 120% 66-135 <br /> Surrogate: Toluene-d8 82.0% 70-130 <br /> Surrogate:4-Bromo luorobenzene 114% 70-130 <br /> MW-30(CPE0196-03)Water Sampled: 05/04/0613:45 Received:05/04/06 15:55 <br /> Bromodichloromethane ND 0.50 µg/L 1 CP03424 05/05/06 05/05/06 EPA 524.2 <br /> Bromoform ND 0.50 <br /> S Chloroform ND 0.50 <br /> g Dibromochloromethane ND 0.50 <br /> i Total Trihalomethanes(THM) ND 0.50 <br /> Surrogate: 1,2-Dichloroethane-d4 126% 66-135 " <br /> 1 Surrogate: Toluene-d8 84.1 % 70-130 " <br /> Surrogate:4-Bromajluorobemene 118% 70-130 " <br /> F <br /> 3 <br /> fl <br /> v <br /> 1 <br /> 2 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> t 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />