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CALIFORNIA LABORATORY SERVICES <br /> Page 23 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 fork Order#:CPG0655 <br /> Tracy,CA 95376 Project Manager. Zac Crawford COC#:69131 <br /> Metals (Dissolved) by PPA 200 Series Methods- Quality Control <br /> Reporting Spike Source "/6REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CP05476-601OA/No Digestion <br /> Blank(CP05476-BLKI) Prepared&Analyzed:07/21/06 <br /> Aluminum ND 50 µg/L <br /> Barium ND 20 " <br /> Chromium ND 10 " <br /> Copper ND 10 " <br /> Iron ND 100 " <br /> Manganese ND 20 " <br /> Nickel ND 20 " <br /> Zinc ND 20 " <br /> Boron ND 50 " <br /> LCS(CP05476-BSI) <br /> Aluminum 1950 50 Prepared&Analyzed:07/21/06 <br /> µg2 2000 97.5 80-120 20 <br /> Barium 1910 20 2000 95.5 80-120 20 <br /> Chromium 210 10 200 105 80-120 20 <br /> Copper 244 10 250 97.6 80-120 20 <br /> Iron 981 100 1000 98.1 80-120 20 <br /> Manganese 496 20 500 99.2 80-120 20 <br /> Nickel 486 20 500 97.2 80-120 20 <br /> Zinc 501 20 500 100 80-120 20 <br /> Boron 2380 50 2500 95.2 80-120 20 <br /> LCS Dup(CP05476-BS1DI) Prepared&Analyzed:07/21/06 <br /> Aluminum 1940 50 µg/L 2000 97.0 80-120 0.514 20 <br /> Barium 1910 20 2000 95.5 80-120 0.00 20 <br /> Chromium 211 10 200 106 80-120 0.475 20 <br /> Copper 243 10 250 97.2 80-120 0.411 20 <br /> Iron 988 100 1000 98.8 80-120 0.711 20 <br /> Manganese 496 20 500 99.2 80-120 0.00 20 <br /> Nickel 488 20 500 97.6 80-120 0.411 20 <br /> Zinc 498 20 500 99.6 80-120 0.601 20 <br /> Boron 2380 50 2500 95.2 80-120 0.00 20 <br /> CA DOHS FLAP Accreditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova,CA 95742 WWW.Californialab.com 916-635-7301 Fax: 916-635-4510 <br />