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t P, <br /> Af7iei-rcai7 Ell" -017nxel7tal Nenvoi <br /> PAGE 7 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9705048 <br /> CLIENT PROJECT ID D-1.03 <br /> Quality Control Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> Definitions <br /> Laboratory Control Samote (LCS)/Method Spike(s) Control samotes of known composition LC5 and Method Spike <br /> data are used to validate batch analytical results <br /> Matrix Solke(s) Aliquot or a sample (aqueous or solid) with aaded quantities of saecific comocuncs and <br /> subjected to the entire analytscat procedure Matrix spike and matrix solke duplicate QC cata are aavisory <br /> Method Blank An anatyticat control consisting of all reagents, internal standards, and surrogate standards <br /> carried througn the entire analytical process Used to monitor laoaratory background and reagent contamination <br /> Not Detected (ND) Not detected at or above the reporting limit <br /> Relative Percent DITference (RPD). An Indication of method precision based on duplicate analysis <br /> Reporting Limit (RL) The lo.iest concentration routinely determined during laboratory operations. The RL is <br /> generally I to 10 times the 4ethod Detection Limit (MDL) Retorting limits are matrix, method, and anatyte <br /> dependent and take into account any dilutions perTormed as part of the analysts. <br /> Surrogates. Organic compounds which are similar to analytes or interest In chemical behavior, but are not round <br /> In environmental samoles. surrogates are added to all blanks, caltoration and check standards, samales, and <br /> spiked samples Surrogate recovery is monitored as an indication or acceptable samole preparation and <br /> Instrumental performance. <br /> D Surrogates diluted out. <br /> K Indicates result outside at established laboratory QC limits. <br />