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1 <br /> r <br /> The laboratories selected to perform the analytical work are certified by the Department of Health <br /> Services (DHS) for hazardous waste testing. Maximum sample holding times are observered based <br /> on the respective analytical test method(Table A-2). <br /> ' QUALITY ASSURANCE/QUALITY CONTROL <br /> Quality assurance/quality control (QA/QC) measures are taken to confirm the integrity of the field <br /> rand laboratory data generated during the monitoring program. An evaluation of the field and <br /> laboratory quality assurance data is included in the technical reports. <br /> r ' Field Quality Assurance Procedures <br /> r Field QA procedures are included in each monitoring event and include the documentation of field <br /> instrument calibration. <br /> rLaboratory Quality Assurance Procedures <br /> Laboratory QA procedures include those required under the DHS hazardous waste testing program. <br /> Specific laboratory QA procedures are included in the laboratory QA manual for surrogate <br /> recoveries, matrix spike recoveries,and matrix spike duplicate.(or duplicate)results. <br /> Method <blanks are analyzed daily to assess the effect of the laboratory environment on the <br /> analytical results. Method blanks are performed for each sample analyzed. <br /> rEach sample to be analyzed for organic parameters will contain compounds.surrogate spike The <br /> g P <br /> surrogate recoveries are used to determine if the analytical instruments are operating within limits. <br /> ' Surrogate recoveries are compared to control limits established and updated by the laboratory <br /> based on its historical operation. <br /> ' Matrix spikes are analyzed at a frequency of approximately 10 percent. Matrix spike results are <br /> evaluated to determine whether the sample matrix is interfering with the laboratory analysis and to <br /> provide a measure of the accuracy of the analytical data. Matrix spike recoveries are compared to <br /> rcontrol limits established and updated by the laboratory based on its historical operation. <br /> Laboratory duplicates are analyzed at a frequency of approximately 10 percent. Spike duplicate <br /> ' results are evaluated to determine the reproducibility (precision) of the analytical method. <br /> Reproducibility values are compared to control limits established and updated by the laboratory <br /> based on its historical operation. <br /> LaboratoryC data is included with the analytical results. This C data includes <br /> Q yt Q method blanks, <br /> r surrogate spike recoveries (for organic parameters only), matrix spike recoveries, and matrix spike <br /> duplicates. <br /> 1 <br /> NAMiscellaneous\Groundwater Info-All Sites\SAP_AppendixA.doc <br /> r A-8 <br />