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CALIFORNIA LABORATORY SERVICES <br /> 05/18/12 12:02 <br /> Environmental Cost Management,Inc. Project: 5725 Hall 2009 CLS Work Order#•CVE0380 <br /> 3525 Hyland Ave.,Suite 200 Project Number: [none] COC#: 130588 <br /> Costa Mesa CA,92626 Project Manager: Binayak Acharia <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 CV03061 -EPA 3020A <br /> Blank(CV03061-BLKI) Prepared&Analyzed:05/09/12 <br /> Arsenic ND 0.27 2.0 pg/L <br /> LCS(CV03061-BS1) Prepared&Analyzed:05/09/12 <br /> Arsenic 106 0.27 2.0 pg/L 100 106 85-115 <br /> Matrix Spike(CV03061-MS1) Source:CVE0283-02 Prepared&Analyzed:05/09/12 <br /> Arsenic 128 0.27 2.0 pg/L 100 17.5 110 70-130 <br /> Matrix Spike(CV03061-MS2) Source:CVE0347-01 Prepared&Analyzed:05/09/12 <br /> Arsenic 111 0.27 2.0 gg/L 100 2.15 109 70-130 <br /> Matrix Spike Dup(CV03061-MSD1) Source:CVE0283-02 Prepared&Analyzed:05/09/12 <br /> Arsenic 125 0.27 2.0 gg/L 100 17.5 108 70-130 2 25 <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 />