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CALIFORNIA LABORATORY SERVICES <br /> 06/26/12 09:37 <br /> Environmental Cost Management,Inc. Project: 5725 Hall 2009 CLS Work Order#•CVE1013 <br /> 3525 Hyland Ave.,Suite 200 Project Number: [none] COC#: 130951 <br /> Costa Mesa CA,92626 Project Manager: Binayak Acharya <br /> Metals by EPA 200 Series Methods - Quality Control <br /> CLS Labs <br /> Reporting Spike Source %REC RPD <br /> Analyte Result MDL Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch CV03474-EPA 3020A <br /> Blank(CV03474-BLK1) Prepared&Analyzed:05/25/12 <br /> Arsenic ND 0.27 2.0 pg/L <br /> LCS(CV03474-BS1) Prepared&Analyzed:05/25/12 <br /> Arsenic 96.3 0.27 2.0 pg/L 100 96 85-115 <br /> Matrix Spike(CV03474-MS1) Source:CVE0940-02 Prepared&Analyzed:05/25/12 <br /> Arsenic 111 0.27 2.0 pg/L 100 9.18 102 70-130 <br /> Matrix Spike(CV03474-MS2) Source:CVE0996-05 Prepared&Analyzed:05/25/12 <br /> Arsenic 104 0.27 2.0 gg/L 100 1.41 102 70-130 <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 />