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�� .. <br /> =111'i77)1•'1it�'�Ir[il . :C'r`-t'r%1'ii <br /> I� PAGE 12 <br /> AEN (CALIFORNIA) <br /> QUALITY CONTROL REPORT <br /> i <br /> AEN JOB NUMBER: 9610259 <br /> !; CLIENT PROJECT ID: 1151401,010010001 <br /> Quality Control Summary , <br /> 'I All laboratory quality control parameters were ',,found to be within established <br /> limits . <br /> i <br /> j <br /> 'i <br /> ii <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 /> I subjected to the entire analytical procedure. Matrix spike and matrix spike duplicate OC 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 /> 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). Reportiling 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 /> j spiked samples. Surrogate recovery is monitored as an indication of acceptable sample preparation and <br /> j instrumental ]performance. <br /> i <br /> D: Surrogates diluted out. <br /> li <br /> #: Indicates result outside of established laboratory QC limits. ,( <br /> I <br /> f. <br /> Ij - <br />