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A;verlccr.;,i Envii-onmewcil Ner�vor k <br /> r .. PAGE 5 <br /> =f <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER: 9803375 <br /> CLIENT PROJECT ID: 17861.0001 <br /> Quality 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 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 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 (NO): 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 iO 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 /> #: Indicates result outside of established laboratory QC Limits. <br />