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Continuing Calibration Verification (CCV) Requirementsp EC'I 11 <br />All associated calibration verification standards ICV or CCV) met the acceptance criteria. ll <br />within the established retention time windows for this method. <br />Quality Control (QQ Information FEB 0 9 2017 <br />Method Blank (MB) Statement ENVIRONMENTAL HEALTH <br />The MB analyzed with this SDG met the acceptance criteria. <br />DEPARTMENT <br />Surrogate Recoveries <br />All surrogate recoveries were within the established acceptance criteria for the samples in this SDG in this batch. <br />Laboratory Control Sample (LCS/LCSD) Recovery <br />The LCS/LCSD spike recoveries met the acceptance limits. <br />QC Sample Designation <br />Sample 374505001 (ECW-20-0021 XES00019) was selected for the matrix spike and matrix spike duplicate <br />analysis. <br />Matrix Spike (MS/MSD) Recovery Statement <br />The MS or MSD (See Below) did not meet spike recovery acceptance limits due to sample matrix interference as <br />the MS and MSD displayed similar spike recovery. <br />Sample <br />Analyte <br />Value <br />1203335898 (Non SDG 374505001MS) <br />Aroclor-1016 <br />142* (33%-130%) <br />1203335899 (Non SDG 374505001MSD) <br />Aroclor-1016 157* (33%-130%) <br />MS/MSD Relative Percent Difference (RPD) Statement <br />The RPD between the MS and MSD met the acceptance limits. <br />Technical Information <br />Holding Time Specifications <br />GEL assigns holding times based on the associated methodology, which assigns the date and time from sample <br />collection of sample receipt. Those holding times expressed in hours are calculated in the AlphaLIMS system. <br />Those holding times expressed as days expire at midnight on the day of expiration. All samples in this SDG met <br />the specified holding time. <br />Preparation/Analytical Method Verification <br />All samples and QC in this batch were cleaned using alumina in order to remove oil and other high molecular <br />weight interferences. All reported analyte detections in client and quality control samples were within the <br />established retention time windows. Reported analyte concentrations were confirmed on dissimilar columns. <br />Sample Dilutions <br />Samples 1203335898 (Non SDG 374505001MS), 1203335899 (Non SDG 374505001MSD), 374726001 (T-1), <br />374726002 (T-2), 374726003 (T-3) and 374726004 (T-4) were diluted prior to analysis due to the oily matrix of <br />the extracts. <br />Sample Re-extraction/Re-analysis <br />Re -extractions or re -analyses were not required in this SDG in this batch. <br />Page 8 of 17 <br />