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A117ertcc111 Eiivi c)11171PI1taI Netivoi C <br /> PAGE 3 <br /> I� <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9509445 <br /> CLIENT PROJECT ID R603 <br /> Quality Control and Project Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> Definitions <br /> Laboratory Control Sample (LCS)/Method Spike(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 date are advisory. <br /> Method Stank: 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 (ND) Not detected at or above the reporting limit <br /> Relative Percent Difference (RPD) An indication of method precision based on duplicate analysis. <br /> Reporting Limit (RL)* The lowest concentration routinely determined during Laboratory oneratinne Ti,e pL ,s <br /> generally 7 to 10 tinies the nernoa Detection Limit (MDL). 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 behavior, 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 /> instrumental performance. <br /> D Surrogates diluted out. <br /> # Indicates result outside of established laboratory oC limits. <br />