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CALIFORNIA LABORATORY SERVICES <br /> Page 17 of 28 07/27/06 10:19 <br /> ENGEO-Tracy Project: North Lathrop Properties <br /> 2880 N.Tracy Blvd Ste 43 Project Number: 5044.5.001.01 CLS Work Order#:CPG0655 <br /> Tracy,CA 95376 Project Manager: Zac Crawford COC#:69131 <br /> Conventional Chemistry Parameters by /EPA Methods - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CP05445-General Preparation <br /> LCS Dup(CP05445-BSDI) Prepared&Analyzed:07/20/06 <br /> Orthophosphate as PO4 0.984 0.15 mgt 0.918 107 80-120 2.61 20 <br /> Matrix Spike(CP05445-MSI) Source:CPG0655-02 Prepared&Analyzed:07/20/06 <br /> Orthophosphate as PO4 1.39 0.15 mg/L 0.918 0.43 105 75-125 25 <br /> Matrix Spike Dup(CP05445-MSD1) Source:CPG0655-02 Prepared&Analyzed:07/20/06 <br /> Orthophosphate as PO4 1.40 0.15 mg/L 0.918 0.43 106 75-125 0.717 25 <br /> Batch CP05449- General Preparation <br /> Blank(CP05449-BLK1) Prepared&Analyzed:07/20/06 <br /> Ammonia as N ND 0.10 mg/L <br /> LCS(CP05449-1351) Prepared&Analyzed:07/20/06 <br /> Ammonia asN 0.462 0.10 mg/L 0.500 92.4 80-120 25 <br /> LCS Dup(CP05449-BSDI) Prepared&Analyzed:07/20/06 <br /> Ammonia as N 0.429 0.10 mg/L 0.500 85.8 80-120 7.41 25 <br /> Matrix Spike(CP05449-MSI) Source:CPG0603-03 Prepared&Analyzed:07/20/06 <br /> Ammonia as N 0.479 0.10 mg/L 0.500 0.060 83.8 75-125 25 <br /> Matrix Spike Dup(CP05449-MSD1) Source:CPG0603-03 Prepared&Analyzed:07/20/06 <br /> Ammonia as N 0.535 0.10 mg/L 0.500 0.060 95.0 75-125 11.0 25 <br /> Batch CP05455- General Prep <br /> Blank(CP05455-BLKl) Prepared&Analyzed:07/21/06 <br /> Bromide ND 0.10 mg/L <br /> Chloride ND 0.50 " <br /> Sulfate as SO4 ND 0.50 " <br /> Nitrate as N ND 0.50 " <br /> Nitmte/Nitrite as N ND 400 pg/L <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 />