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. Ani.eii n E2vironmental Network <br /> PAGE 5 <br /> h <br /> II <br /> M - <br /> I` <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL RE-PORT <br /> AEN JOB NUMBER: 9,512329 <br /> CLIENT PROJECT ID: D-104 <br /> - Quality__.Control and Project Summary <br /> All laboratory quality control parameters were f=ound to be within established <br /> limits . <br /> Definitions <br /> Laboratory Control Sample (ECS)/Methad Spike(s): Control sampl s 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) win added quantities of specific compounds and <br /> subjected to the entire analytical procedure. Matrix spike anc 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 (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 deter ined during Laboratory operations. The RL is <br /> generally I to 10 times the Method 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 /> 0 <br /> : Indicates result outside of established Laboratory QC Limits. <br />