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CALIFORNIA LABORATORY SERVICES <br /> Committed. Responsive. Flexible. <br /> Page 4 of 4 ouzo/zs 16;08 <br /> Tetra Tech Geo Project: Clean Harbors Forward Landfill <br /> 3101 Zinfandel Drive Suite 200 Project Number: 117-127827-25004 CLS Work Order#:25111164 <br /> Rancho Cordova,CA 95670 Projml Manager: Katie Hendrickson COC#: <br /> Notes and Definitions <br /> QS4 The surrogate recovery for this sample is outside of established control limits due to a sample matrix effort. <br /> QRL-8 The extract of this sample was dark and/or oily.Therefore,the sample was analyzed with a dilution and the reporting limit was <br /> raised for all target compounds. <br /> QR-1 The RPD value for the sample duplicate or MS/MSD was outside of the QC acceptance limits due to matrix interference.QC batch <br /> accepted based on LCS and/or LCSD recovery. <br /> DET Analyte DETECTED <br /> ND Analyw NOT DETECTED at or above the reporting limit(or method detection limit when spmified) <br /> NR Not Reported <br /> dry Sample results reported on a dry weight basis <br /> RPD Relative Percent Difference <br /> 3249 Ftzgerald Road,Rancho Cordova,CA 95742 1800.&38.7301 1 Tel:916.638.7301 X102 I Fax:916.638.4510 1 www.caGfomialob.com <br /> Small Business#2916 1 ELAP#1233 1 NAICS#541380 1 CA SWRCB ELAP Accreditation/Registrafion Number 1233 <br /> Far regulatory purposes,please refer to s .califomialab.ctmVosrtifications to find a list of approved analytes by mettwd. <br />