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1 AJ 'an Environmental Network <br /> I <br /> + PAGE QR-1 <br /> i <br /> i <br /> ,i <br /> AEN (CALIFORNIA) '] <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER: 9710;361 <br /> CLIENT PROJECT ID: 90954. 03 <br /> IF <br /> I R <br /> Quality Control and Pro.iect Summary <br /> All laboratory quality control parameters were foundato be within established <br /> j limits. <br /> I , <br /> t � i <br /> S <br /> ui <br /> L <br /> Definitions <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 (aqueous 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, internail standards. and surrogate standards <br /> carried through the entire analytical process. Used to monitor laboratory background and reagent contamination. <br /> Not Detected (ND): Not detected at or above the reporting limit. <br /> t <br /> Relative Percent Difference (RPD): An indication of method precision based on ,duplicate analyses. <br /> Reporting Limit (RL): The lowest concentration routinely determined dur,,ing laboratory operations. The RL is <br /> generally 1 to 10 times the Method Detection Limit (MDL). Reporting limiits 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 interesttin chemical behaviour. but are not found <br /> in environmental samples. Surrogates are added to all blanks, calibrati'lon and check standards, samples. and <br /> I L 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 QC limits. <br /> �t <br />