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CALIFORNIA LABORATORY SERVICES <br /> Page 31 of 31 02/08/13 12:06 <br /> Tetra Tech Geo Project: VOP-TRACY <br /> 2969 Prospect Park Drive,Suite 100 Project Number: 117-7059009 CLS Work Order#:CWB0016 <br /> Rancho Cordova,CA 95670 Project Manager: Tim Costello COC#:2 COCs <br /> Notes and Definitions <br /> QRL-7 The initial volume was decreased or the final volume of the extract was increased due to matrix interference,which resulted in <br /> higher reporting limits. <br /> QM-5 The spike recovery was outside acceptance limits for the MS and/or MSD due to matrix interference.The LCS and/or LCSD were <br /> within acceptance limits showing that the laboratory is in control and the data is acceptable. <br /> QM-4X The spike recovery was outside of QC acceptance limits for the MS and/or MSD due to analyte concentration at 4 times or greater <br /> the spike concentration.The QC batch was accepted based on LCS and/or LCSD recoveries within the acceptance limits. <br /> A-COM Run by ICP-MS(EPA6020) <br /> DET Analyte DETECTED <br /> ND Analyte NOT DETECTED at or above the reporting limit(or method detection limit when specified) <br /> NR Not Reported <br /> dry Sample results reported on a dry weight basis <br /> RPD Relative Percent Difference <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 />