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1 <br />t <br />W Laboratory Quality Assurance Procedures <br />Laboratory quality assurance procedures will include those required under the Department <br />of Health Services hazardous waste testing program. Specific laboratory quality assurance <br />procedures are included in the laboratory QA manual for surrogate recoveries, matrix <br />spike recoveries, and matrix spike duplicate (or duplicate) results. <br />Method blanks will be analyzed daily to assess the effect of the laboratory environment on <br />the analytical results. Method blanks will be performed for each parameter analyzed. <br />Each sample to be analyzed for organic parameters will contain surrogate spike <br />compounds. The surrogate recoveries will be used to determine if the analytical <br />instruments are operating within limits. Surrogate recoveries will be compared to control <br />limits established and updated by the laboratory based on its historical operation. <br />Matrix spikes will be analyzed at a frequency of approximately 10 percent. Matrix spike <br />results will be evaluated to determine whether the sample matrix is interfering with the <br />laboratory analysis and to provide a measure of the accuracy of the analytical data. Matrix <br />spike recoveries will be compared to control limits established and updated by the <br />laboratory based on its historical operation. <br />® Laboratory duplicates will be analyzed at a frequency of approximately 10 percent. Spike <br />duplicate results will be evaluated to determine the reproducibility (precision) of the <br />analytical method. Reproducibility values will be compared to control limits established <br />and updated by the laboratory based on its historical operation. <br />Laboratory QC data will be included with the analytical results. This QC data will include <br />method blanks, surrogate spike recoveries (for organic parameters only), matrix spike <br />recoveries, and matrix spike duplicates. <br />SA0N �PJ00939M390031.9BG-94 sdg:4 D -g Rev. 0, 420/95 <br />C <br />