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PAGER- <br /> Q 1 i <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER: 9711383 <br /> CLIENT PROJECT ID: 90954 <br /> Quality Control and Pro.iect Summary <br /> All laboratory quality control parameters were found ;to be within established <br /> limits. <br /> Definitions <br /> i <br /> Laboratory Control Sample (LCS)/Method Spikes(s): Control samples of known composition. LCS and Method Spike <br /> data are used to validate batch analytical results. <br /> Matrix Spike(s): Aliquot of a sample (a ueous or solid) with added quantities of specific compounds and <br /> subjected to the entire analytical procedure. Matrix spike and matrix spike duplicate QC data are advisory. <br /> Method Blank: 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 /> Not Detected (NO): Not detected at or above the reporting limit. <br /> Relative Percent Difference (RPO): An indication of method precision based on duplicate analyses. <br /> r Reporting Limit (RL): The lowest concentration routinely determined duringlaboratory operations. The RL is <br /> J generally 1 to 10 times the Method Detection Limit (MOL). 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. calibrationand check standards, samples, and <br /> spiked samples. Surrogate recovery is monitored as an indication of acceptable sample preparation and <br /> instrument performance. <br /> 0: Surrogates diluted out. € <br /> e <br /> I: Interference. <br /> �: Indicates result outside of established laboratory QC limits. <br />