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Amei ican Eiii a vrarrretital Net" rel k <br /> PAGE 7 <br /> 1 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> 1 <br /> AEN JOB NUMBER 9502013 <br /> CLIENT PROJECT ID 41820-001-00 <br /> Ouality Control and Pro.lect 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 CC 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 licit. <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 part of the analysis. <br /> t 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 /> it: Indicates result outside of established laboratory OC limits. <br />