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ArU cai7 Eii0roizs7teiIta1 Ne <br /> tivork <br /> 1 <br /> PAGE QR-1 <br /> t <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> �i <br /> AEN JOB NUMBER: 97 .0182 <br /> CLIENT PROJECT ID: 11514.005.001 <br /> r <br /> Quality Control and Pro.iect Summary <br /> I <br /> All laboratory quality control parameters were found to be within established <br /> limits . <br /> f <br /> i <br /> I <br /> 1 <br /> I' i} <br /> 1 <br /> I � <br /> II <br />+ Definitions <br /> Laboratory Control ,Sample (LCS)/Method Spikes(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 />( 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 (ND): Not detected at or above the reporting limit. <br /> p 9 <br /> Relative Percent Difference (RPD): An indication of method precision based on duplicate analyses. j <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 /> kk <br /> Surrogates: Organic compounds which are similar to analytes of interest in chemical behaviour, but are not found f <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 /> instrument performance. <br /> D: Surrogates diluted out. <br /> I: Interference. <br /> !: Indicates result outside of established laboratory QC limits. } <br /> I <br /> J <br />