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CALIFORNIA LABORATORY SERVICES <br /> Page 16 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 Fork Order#: CPG0655 <br /> Tracy,CA 95376 Project Manager: Zac Crawford COC#:69131 <br /> Conventional Chemistry Parameters by PA Methods - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CP05432-General Preparation <br /> Blank(CP05432-BLKI) Prepared&Analyzed:07/20/06 <br /> Specific Conductance(EC) ND 1.0 µmhos/cm <br /> Batch CP05441 -General Preparation <br /> Blank(CP05441-BLICI) Prepared&Analyzed:07/20/06 <br /> Sulfite ND 5000 gg/L <br /> LCS(CP05441-BSI) Prepared&Analyzed:07/20/06 <br /> Sulfite 18000 5000 4g/L 20000 90.0 80-120 20 <br /> LCS Dup(CP05441-BSDI) Prepared&Analyzed:07/20/06 <br /> Sulfite 19000 5000 gg/L 20000 95.0 80-120 5.41 20 <br /> Matrix Spike(CP05441-MS1) Source:CPG0639-02 Prepared&Analyzed:07/20/06 <br /> Sulfite 95000 25000 pg/L 100000 15000 80.0 75-125 20 <br /> Matrix Spike Dup(CP05441-MSDI) Source:CPG0639-02 Prepared&Analyzed:07/20/06 <br /> Sulfite 90000 25000 pg/L 100000 15000 75.0 75-125 5.41 20 <br /> Batch CP05445-General Pre aration <br /> Blank(CP05445-BLKI) Prepared&Analyzed:07/20/06 <br /> Orthophosphate as PO4 ND 0.15 mg/L <br /> LCS(CP05445-BSI) Prepared&Analyzed:07/20/06 <br /> Orthophosphate as PO4 1.01 0.15 mg/L 0.918 110 80-120 20 <br /> CA DOHS FLAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 .californialab.com 916-638-7301 Fax: 916-634-4510 <br />