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Mel I( L111 L�lll II O]lH2C'r1l�l� ,'�/�" t �.l h <br /> PAGE 4 <br /> AEN (CALIFORNIA) ' <br /> QUALITY CONTROL REPORT <br /> -- <br /> __AEN_JOB-NUMBER ---9608420_— <br /> CLIENT PROJECT ID 03733-007-002 <br /> Quality Control and Pro.iect Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> f <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 /> l <br /> # Indicates result outside of established laboratory OC limits. <br />