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Aniei i(an Envrr onniewal Network <br /> PAGE 9 <br /> iAEN CALIFORNIA <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9608056 <br /> CLIENT PROJECT ID 020200213 2003 <br /> i <br /> Wality Control and Pro ect Summar <br /> ' All laboratory quality control parameters were found to be within established <br /> limits <br /> i <br /> 1 <br /> 1 Definitions <br /> Laboratory Control Sample (LCS1/Method Spikes) Control samples of known composition ICS and Method Spike <br /> 1 data are used to validate batch analytical results <br /> Matrix Spike(s) Atiquot of a sample (aqueous or solid) with added quantities of specific compounds and <br /> subjected to the entice 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 /> trot Detected 101 Not detected at or above the reporting limit <br /> 1 Relative Percent Di:ference (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 /> 1 <br /> D Surrogates ciluted out <br /> Indicates result outside of established laboratory OC limits <br /> i <br />