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( r <br /> CALIFORNIA LABORATORY SERVICES <br /> Page 22 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 CP05539-General Preparation <br /> LCS(CP05539-BS1) Prepared&Analyzed:07/25/06 <br /> Total Kjeldahl Nitrogen 0.844 0.20 mg/L 1.00 84.4 80-120 20 <br /> LCS Dup(CP05539-BSD1) Prepared&Analyzed:07/25/06 <br /> Total Kjeldahl Nitrogen 0.828 0.20 mg/L 1.00 82.8 80-120 1.91 20 <br /> Matrix Spike(CP05539-MSI) Source:CPG0655-02 Prepared&Analyzed:07/25/06 <br /> Total Kjeldahl Nitrogen 1.05 0.20 mg/L 1.00 0.91 14.0 75-125 25 QM-5 <br /> Matrix Spike Dup(CP05539-MSD1) Source:CPG0655-02 Prepared&Analyzed:07/25/06 <br /> Total Kjeldahl Nitrogen 1.13 0.20 mg/L 1.00 0.91 22.0 75-125 7.34 25 QM-5 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 www.californialab.com 916-638-7301 Fax: 916-638-4510 <br />