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' Ame an Environmental Network <br /> PAGE 7 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9512009 <br /> ' CLIENT PROJECT ID D-101 <br /> ' Quality Control and Project 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 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 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 /> 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 />