stat - 7 7.1 DATA ANALYSIS AND STATISTICAL TREATMENT...

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DOE/OR-1066R5/02-03 7-1 7. DATA ANALYSIS AND STATISTICAL TREATMENT 7.1 INTRODUCTION Four goals for analysis and statistical treatment of data are identified in Chap. 7 of the Regulatory Guide . These goals address estimation of radionuclide concentrations and measures of accuracy and precision, comparisons to previous values and regulatory or dose limits, comparison of on-site concentrations to reference location concentrations, and evaluations of the comparisons. These goals are addressed for both the radiological and nonradiological monitoring programs through a general discussion of the DQO process, data analysis, and by addressing the should* elements in the Regulatory Guide section. 7.2 DATA QUALITY OBJECTIVES The principal means of ensuring that data are of sufficient quality and adequate quantity to achieve a monitoring or surveillance objective is to establish DQOs for the program. These are the specifications for the sampling, laboratory analysis, and data evaluation that support decisions or comparisons to criteria. Considerations in the DQO development process include the types of decisions that will be supported by the data, how the data will be used, requirements for accuracy and precision of methods, acceptable levels of uncertainty, comparability to previously collected data, representativeness, and repeatability. The process is a collaborative effort that requires the involvement of all the disciplines that have responsibility in the path from sampling design through the final decision or estimate. 7.3 DATA ANALYSIS The approach to data analysis at each of the three facilities on ORR has evolved in response to effluent monitoring and environmental surveillance requirements, reporting schedules, and available resources. Effluent monitoring data are assessed against regulatory requirements and evaluated for trends on a schedule that is consistent with reporting requirements. These requirements are identified in the implementing regulations of the laws and site-specific permits. All effluent monitoring and environmental surveillance data are summarized in ASER. The general purpose of this information is to chronicle the impacts of the operations at the facilities and not to identify changes in operations or process upsets when they occur. Environmental
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