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2.7.1 Major factors in the radiological characterisation of sites and/or groundwater

The level of effort associated with planning of the activities for site characterisation should be based on the complexity of the survey. Large, complicated sites generally should receive a significant amount of effort during the planning phase, while smaller sites may not require as much planning effort [USNRC-2002].

Planning radiological surveys using the Data Quality Objectives Process should result in improving the survey effectiveness and efficiency, and thereby the defensibility of decisions. It should also minimise expenditures related to data collection by eliminating unnecessary, duplicative, or overly precise data. The use of the Data Quality Objectives Process should assure that the type, quantity, and quality of environmental data used in the decision making will be appropriate for the intended application. It should provide systematic procedures for defining the criteria that the survey design should satisfy, including when and where to perform measurements, the level of decision errors for the survey, and how many measurements to perform.