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z 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 <br /> recoveries, and matrix spike duplicates (or duplicate) results <br /> Method blanks were analyzed dally to assess the effect of the laboratory environment on <br /> the analytical results Method blanks were performed for each parameter analyzed <br /> Each sample to be analyzed for organic parameters contained surrogate spike compounds <br /> The surrogate recoveries were used to determine if the analytical instruments were <br /> operating within limits Surrogate recoveries were compared to control limits established <br /> and updated by the laboratory based on its historical operation <br /> Matrix spikes were analyzed at a frequency of approximately 10 percent Matrix spike <br /> results were evaluated to determine whether the sample matrix was interfering with the <br /> laboratory analysis and to provide a measure of the accuracy of the analytical data Matrix <br /> spike recoveries were compared to control limits established and updated by the <br /> laboratory based on 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 <br /> analytical method Reproducibility values were compared to control limits established and <br /> updated by the laboratory based on its historical operation <br /> Laboratory QA/QC data were included with the analytical results This QA/QC data <br /> included method blanks, surrogate spike recoveries (for organic parameters only), matrix <br /> spike recoveries, and matrix spike duplicates <br /> SAC/pj2\2520\25201000 las-94 pas 3 A-8 Rev 0 0727/94 <br />