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F a <br /> CALIFORNIA LABORATORYSERVICES <br /> Page 27 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 /> T'ri alomethanes by EPA Method 524.2 - Quality Control <br /> =A.alyte Reporting Spike Source %REC RPD <br /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CP05515-EPA 5030 Water MS <br /> Blank(CP05515-BLKI) Prepared&Analyzed:07/24/06 <br /> Bromodichloromethane ND 0.50 pg/L <br /> Bromoform ND 0.50 " <br /> Chloroform ND 0.50 " <br /> Dibromochloromethane ND 0.50 " <br /> Total Trihalomethanes(THM) ND 0.50 " <br /> Surrogate:l,2-Dichloroethane-d4 11.2 10.0 112 66-135 <br /> Surrogate:Toluene-d8 9.30 10.0 <br /> 93.0 70-130 <br /> Surrogate:4-Bromofluorobemene 10.8 10.0 108 70-130 <br /> LCS(CP05515-BS1) Prepared&Analyzed:07/24/06 <br /> Bromodichloromethane 23.3 0.50 pg/L 20.0 116 70-130 30 <br /> Bromoform 24.0 0.50 20.0 120 70-130 30 <br /> Chloroform 21.0 0.50 20.0 105 70-130 30 <br /> Dibromochloromethane 24.0 0.50 20.0 120 70-130 30 <br /> Surrogate:l.2-Dichloroethane-d4 10.6 10.0 106 66-135 <br /> Surrogate:Toluene-d8 9.65 10.0 96.5 70-130 <br /> Surrogate:4-Bromofluorobetraene 9.34 10.0 93.4 70-130 <br /> LCS Dup(CP05515-BSD1) Prepared&Analyzed: 07/24/06 <br /> Bromodichloromethane 20.8 0.50 pg/L 20.0 104 70.130 11.3 30 <br /> Bromoform 23.3 0.50 20.0 116 70-130 2.96 30 <br /> Chloroform 18.4 0.50 20.0 92.0 70130 13.2 30 <br /> Dibromochloromethane 22.1 0.50 20.0 110 70-130 8.24 30 <br /> Surrogate:1,2-Dichloroethane-d4 10.2 10.0 102 66-135 <br /> Surrogate:Toluene-d8 9.69 10.0 96.9 70-130 <br /> Surrogate:4-Bromofluorobemene 9.69 10.0 96.9 70-130 <br /> CA DOHS FLAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 WWW.C21ifornialab.com 916-638-7301 Fax: 916-635-4510 <br />