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f1iYlieri[ [X71 Elivir iinie11IUl Nem,oj"k <br /> • <br /> PAGE QR-1 <br /> I <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9803039 <br /> CLIENT PROJECT ID 95-186 <br /> I <br /> I <br /> Quality Control and Pro ect Summar <br /> Sample KR VW-6 <br /> Reporting limits elevated due to high levels of non-target compounds Sample run <br /> at dilution <br /> Surrogate recoveries for 1 2-dichloroethaie-d4 and toluene-d8 are below QC limits <br /> due to matrix interference Results are estimated <br /> All other laboratory quality control parameters were found to be within established <br /> l l ml t5 <br /> I <br /> Defrnit�ons <br /> Laboratory Control Sample (LCS)/Metheo Spikes(s) Contra 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 quart 1ties of specific compounds and <br /> subjected tc the enu re analytical procedure Matrix sp14e and matrix spike duplicate QC data are advisory <br /> F <br /> Method Blank An ana'ytical 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 or duplicate analyses <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 a� part of the analysis <br /> Surrogates Organ c compounds which are similar to analytes of interest in chemical behaviour but are not found <br /> in environmental samples Surrogates are added to all blcnks calibration and check standards samples and <br /> spiked samples Surrogate recovery is monitored as an indication of acceptable sample preparation and <br /> 'rstrument performance <br /> SUrrcgates di uteC out <br /> interference <br /> Indicates result outside of established laboratory CC limits <br />