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Al'IL4JI(ai Eiivirorii�ieilt(jl iV(,' <br /> UPAGE 3 <br /> u <br /> AEN (CALIFORNIA) <br /> UQUALITY CONTROL-REPORT <br /> AEN JOB NUMBER: 9508141 <br /> CLIENT PROJECT ID: 2990.95 <br /> Quad itv Control' Summary <br /> All laboratory quality control parameters were found to be within established <br /> U limits. <br /> U <br /> 0 <br /> Ll <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 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 /> 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 tale 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 /> spiked samples. Surrogate recovery is monitored as an indication of acceptable sample preparation and <br /> instrumental performance. <br /> D: Surrogates diluted out. <br /> Indicates result outside of established Laboratory QC Limits. <br /> U <br />