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- Afnei - vi Eizviroi7niewal Netvvor <br /> PAGE 8 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> AEN JOB NUMBER 9509437 <br /> CLIENT PROJECT IO D-101 CONRADY <br /> Quality Control and Pro.iect Summary <br /> All laboratory quality control parameters were found to be within established <br /> limits <br /> i <br /> ' Definitions I <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 analytical procedure. Matrix spike and matrix spike duplicate QC data are advisory. <br /> I <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 /> li <br /> Not Detected (ND). Not detected at or above the reporting limit. ` E <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 (MDL) Reporting limits are matrix, method, and analyte <br /> dependent, and take into account any dilutions performed as part of the analysis i <br /> +il l ' I 1 u II'�f <br /> + l Surrogates Organicltompounds which are similar to analytesiof interest in chemical behavior, but are not found, i <br /> !:in environmentall samples. Surrogates are added�to'all blanks, Icalibration1andreheck standards, samples, and4 <br /> i spiked samples. Surrogate, recovery, Eis monitored as an indication ofracceptabLe sample preparation and <br /> i q instrumental performance. 1'I <br /> I <br /> I' D: Surrogates' di luted out. f , l <br /> i I f I '��I � !� <br /> #: Irxlicateslresult de 19f established ilaboratory QCT Limits <br /> I � r <br /> fI I h <br />