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r4 <br /> 1 <br /> rM <br /> American Environmewal Netuvoi k <br /> PAGE 4 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9511280 <br /> CLIENT PROJECT ID 04020190-1001 <br /> unlit Control and Pro ect Summar <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> Definitions <br /> Laboratory Control sample (LCS)/Method Sptke(s): Control samples of known composition. LCS and Method Spike <br /> data are used to validate batch analytical results. <br /> added quantities of specific compounds and <br /> Matrix Spike(s): Aliquot of a sample (aqueous or solid) with <br /> subjected to the entire analytical procedure. Matrix spike and matrix spike duplicate QC date are advisory. <br /> Method Blank: An analytical control consisting of ail reagents, internal standards, and surrogate standards <br /> carried through the entire analytical process. Used to monitor laboratory background and reagent contamination - <br /> Not Detected (RD): Not detected at or above the reporting limit. - <br /> Relative Percent Difference (RPD): An indication of method precision based on duplicate analysts <br /> tory operations <br /> e RL is <br /> Reporting Limit <br /> 10timesThe theMethodDe Detection Limit entration tt(MDL)inelydetermined <br /> limits abreamatr x, method, and hanalyte <br /> generally rt of the analysts. <br /> dependent and take into account any dilutions performed as pa <br /> Surrogates. Organic compounds which are similar to analytes of interest in chemical behavior, but are not found <br /> check standards, <br /> les, and <br /> to <br /> in environmental samples <br /> Surrogate urecavery are <br /> monitoreddallblanks, <br /> arâ–ºntndtcationa of acceptable sample preparat on and <br /> spiked samples <br /> instrumental performance <br /> D Surrogates diluted out. <br /> # Indicates result outside of established laboratory QC limits <br />