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Anici rc urt Ltti if oittpic wal Nc hi of k <br /> PAGE 22 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9508058 <br /> ' CLIENT PROJECT ID 4182002300 <br />' Quality Control and Project_Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> i <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 GC data are advisory <br /> Method Blank An analyticaL control consisting of all reagents, internal standards, and surrogate standards <br /> carried through the entire analyticat 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 operations. The RL is <br /> generally 1 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 pert of the analysis. <br /> Surrogates Organic compounds which are similar to analytes of interest in chemical behavior, but are rat 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 /> 8: Indicates result outside of established laboratory CC limits. <br />