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�n1('11( ull E111 11 011111(,wul N(,tti n1I< <br /> PAGE QR-1 <br /> J <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9712323 <br /> CLIENT PROJECT ID 96-089 <br /> Quality Control and Project Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> Definitiors <br /> Laboratory Control sample (LCS)/Method Spikes(s) Cortrpl 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 corsisting of all reagents interral standards and surrogate standards ,I <br /> carried through the entire analytical process Used to monitor laboratory background and reagent contain ration <br /> Not Detected (ND) Not detected at or above the reportlnc limit <br /> Relative Percent Difference (RPD) An indication of method precision based on duplicate analyses <br /> ! Reporting Limit (RL) The lowest concentration routinely determined during laboratory operatiors 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 Drga m c compounds which are similar to aralytes of interest in chemical behaviour but are not found <br /> in environmental samples Surrogates are added to all blanks calibration and check standards samples and <br /> t spiked samples Surrogate recovery is moritored as an indication of acceptable sample preparation and <br /> f instrument performance <br /> h <br /> D Surrogates diluted out <br /> III <br /> I Interference i <br /> 1 Indicates resin- outside of established laboratory QC lim,ts <br /> h <br /> F <br />