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A major purpose of source testing is to provide information needed to determine the impact of sources on the indoor environment. Both the source testing data and the data analysis are important for meeting this need. Ideally, the experiments would run long enough to capture all of the emissions from the source. Unfortunately, such testing is not practical for many types of sources such as pressed wood products and many building materials. Thus the source emission models and consequent risk assessment must be based on incomplete knowledge of the total source emissions. The types of source data and source data analysis needed for development of source risk assessments are discussed in this paper. Suggestions for dealing with imperfectly characterized sources are made. This paper discusses only those aspects of the risk assessment related to the source and source emissions model. Aspects of risk assessment related to activity patterns and health effects of pollutants are not discussed.
source testing, risk assessment, exposure, IAQ modeling, source modeling
Senior chemical engineer, US Environmental Protection Agency, Air and Energy Engineering Research Laboratory, MD-54, Triangle Park, NC
University of Aarhus, Aarhus,
Wesser and Dueholm, Copenhagen,