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• <br /> LABORATORY QUALITY ASSURANCE/QUALITY CONTROL PROCEDURES <br /> Laboratory QA/QC procedures included those required under the DHS hazardous waste <br /> testing program. Specific laboratory quality assurance procedures were included in the <br /> laboratory's QA/QC manual, including reporting surrogate recoveries, matrix spike recoveries, <br /> and matrix spike duplicates (or duplicate) results <br /> Method blanks were analyzed dally to assess the effect of the laboratory environment on the <br /> analytical results Method blanks were performed for each parameter analyzed <br /> Each sample to be analyzed for organic parameters contained surrogate spike compounds The <br /> surrogate recoveries were used to determine if the analytical instruments were operating within <br /> 4rruts Surrogate recoveries were compared to control limits established and updated by the <br /> laboratory based on its historical operation <br /> Matrix spikes were analyzed at a frequency of approximately 10 percent Matrix spike results <br /> were evaluated to determine whether the sample matrix was interfering with the laboratory <br /> analysis and to provide a measure of the accuracy of the analytical data Matrix spike <br /> recoveries were compared to control limits established and updated by the laboratory based on <br /> its historical operation <br /> Laboratory duplicates were analyzed at a frequency of approximately 10 percent Spike <br /> duplicate results were evaluated to determine the reproducibility (precision) of the analytical <br /> method Reproducibility values were compared to control limits established and updated by the <br /> laboratory based on its historical operation <br /> Laboratory QA/QC data were included with the analytical results This QA/QC data included <br /> method blanks, surrogate spike recoveries (for organic parameters only), matrix spike <br /> recoveries, and matrix spike duplicates <br /> • <br /> SAC\N\PD2\2520K252010001Gs-94\pas 1 <br />