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1 <br /> American bivii oiiMewal Nenvoi k <br /> PAGE 16 <br /> 1 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> ' AEN JOB NUMBER 9505190 <br /> ' CLIENT PROJECT ID C3077 <br /> Quality-Control Summar <br /> ' All laboratory quality control parameters were found to be within established <br /> limits <br /> ' Definitions <br /> Laboratory Control Sample (LCS)/Method 5pike(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 OC data are advisory. <br /> Method stank: 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 /> iNot 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 /> I <br /> #• Indicates result outside of established laboratory OC limits <br /> it <br />