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CALIFORNIA LABORATORY SERVICES <br /> Page 13 of 28 07/27/06 10:19 <br /> ENGEO-Tracy Project: North Lathrop Properties <br /> 2880 N.Tracy Blvd Ste#3 Project Number: 5044.5.001.01 CLS Work Order#: CPG0655 <br /> Tracy,CA 95376 Project Manager: Zac Crawford COC#:69131 <br /> Trihalomethanes by EPA Method 524.2 <br /> Reporting <br /> AnalyteResult Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MWl(Unfiltered)(CPG0655-01)Water Sampled:07/19/06 12:40 Received:07/19/06 17:30 <br /> Bromodichloromethane ND 0.50 pg/L I CP05515 07/21/06 07/24/06 EPA 524.2 <br /> Bromoform ND 0.50 <br /> Chloroform ND 0.50 <br /> Dibromochloromethane ND 0.50 " <br /> Total Trihalomethanes(THM) ND 0.50 <br /> Surrogate: 1,2-Dichloroethane-d4 120% 66-135 " <br /> Surrogate: Toluene-d8 93.9% 70-130 " <br /> Surrogate:4-Bromofluorobenzene 107% 70-130 <br /> NIW2(Unfiltered)(CPG0655-03)Water Sampled:07/19/06 11:57 Received:07/19/06 17:30 <br /> Bromodichloromethane ND 0.50 pg/L I CP05515 07/21/06 07/24/06 EPA 524.2 <br /> Bromoform ND 0.50 " <br /> Chloroform ND 0.50 " <br /> Dibromochloromethane ND 0.50 <br /> Total Trihalomethanes(THM) ND 0.50 <br /> Surrogate: 1,2-Dichloroethane-d4 104% 66-135 " <br /> Surrogate: Toluene-d8 95.3% 70-130 <br /> Surrogate:4-Bromofluorobenzene 101% 70-130 „ <br /> NIW3(Unfiltered)(CPG0655-05)Water Sampled:07/19/0611:17 Received:07/19/0617:30 <br /> Bromodichloromethane ND 0.50 µg/L 1 CP05515 07/21/06 07/24/06 EPA 524.2 <br /> Bromoform ND 0.50 <br /> Chloroform ND 0.50 <br /> Dibromochloromethane ND 0.50 <br /> Total Trihalomethanes(THM) ND 0.50 <br /> Surrogate: 1,2-Dichloroethane-d4 112% 66-135 <br /> Surrogate: Toluene-d8 94.1% 70-130 " <br /> Surrogate:4-Bromofluorobenzene IOS% 70-130 " <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californialab.com 916-638-7301 Fax: 916-635-4510 <br />