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' Al Clfi E171 iron)77C'll i'venvoi k <br /> PAGE 12 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> 1 <br /> AEN JOB NUMBER 9509263 <br /> ' <br /> CLIENT PROJECT ID D101 CONRADY <br /> i ' Quality Control and -Project Summar <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> I <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 ana€ytical 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 (RD) Not detected at or above the reporting limit. <br /> ' Relative Percent Difference (RPD): An indication of method precision based on duplicate analysis <br /> I � <br /> Reporting Limit (RL). The lowest concentration routinely determined during laboratory operations. The RL is <br /> I I <br /> generaLty i to 10 times the Method Detection Limit (MDL). Reporting limits are matrix, method, and analyte' <br /> ' ill dependent and take intoaccountany dilutions performed-as part of, the analysis. ; <br /> ; <br /> Surrogates I brgantc cor�ounds which,are similar to analytes of interestlin chemicat`behavilor, but are not found) I <br /> in environmentalL sampLes Surrogates are added to alllbLanks,llca(ibration'and check standards, samples, and ' <br /> spikedlsamples. (!'Surrogate, recovery, is monitoredlas an indicattion of acceptable sampLe preparatiori and l <br /> instruiieritaL,performance I <br /> D SUrrOgate511d1 luted,� ut 0 I I I I 1 I'1 1 1 It I I�I I I I I I, <br /> I I Ill! (III I [� l I 11'x,1 ,l I� ,1 � ( III <br /> ' # Indicates result outside of established laboratory QC limits ) ill I l� � l II <br /> I I , <br />