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A111�'Ull E17171-017177Pwal1`1C'7`mvi <br /> PAGE QR-1 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER: 9803238 <br /> CLIENT PROJECT ID: 10666 <br /> Ouality Control and Project Summary <br /> v <br /> L All laboratory quality control parameters were found to be within established <br /> limits. <br /> L <br /> Definitions <br /> i Laboratory Control Sample (LCS)/Method Spikes(s): Ceritrol samples of known composition. LCS and Method Spike <br /> L data are used to validate batch analytical results. <br /> Matrix Spike(s): Aliquot of a sample (aqueous or solid) with added quantities of specific compounds and <br /> ` subjected to the entire analytical procedure. Matrix spike and matrix spike duplicate OC data are advisory. <br /> i4r Method Slink: An analytical control consisting of all reagents, internal standards, and surrogate standards <br /> carried through the entire analytical process. Used to monitor laboratory background and reagent contamination. <br /> LNot Detected (ND): Not detected at or above the reporting limit. <br /> Relative Percent Difference (RPD): An indication of.method precision based on duplicate analyses. <br /> Reporting Limit (RL): The lowest concentration routinely determined during laboratory operations. The RL is <br /> generally 1 to 10 tins the Method Detection Limit (PiDL). Reporting limits are matrix, method. and analyte <br /> dependent and take into account any dilutions performed as part of the analysis. . <br /> Surrogates: Organic compounds which are similar to analytes of interest in chemical behaviour, but are not found <br /> in environmental samples. Surrogates are added to all blanks. calibration and check standards, samples. and <br /> spiked samples. Surrogate recovery is monitored as an indication of acceptable sample preparation and <br /> instrument performance. <br /> D: Surrogates diluted out. <br /> I: Interference. <br /> !: Indicates result outside of established laboratory OC limits. <br /> L <br />