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.109/0406 WED 11 23 FAX GROUNDWATER ft 022 <br /> American Environmental Network <br /> PAGE 9 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9608056 <br /> CLIENT PROJECT IQ 020200213 2003 <br /> Quality Control and Project Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> Def t ni to ass <br /> Laboratory Control Semple (LCS)/Method Spike(s)- control samples of known composition LLS and Method spike <br /> data are used to validate batch analytical results <br /> Matrix spikes) 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 OC data are advisory <br /> Method stank: 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 (BO) Not detected at or above the reporting liiait <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 (MD0. Reporting limits are matrix, method, and anatyte <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 envirormiental 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 /> af: indicates result outside of establivi ed Laboratory OC limits. <br />