|EPA developed this assessment tool to inform both national and more localized efforts to collect information and characterize/reduce air toxics emissions (e.g., prioritize pollutants/geographic areas of interest for monitoring and community assessments). EPA suggests that the results of this assessment be used cautiously, as the overall quality and uncertainties of the assessment will vary from location to location as well
as from pollutant to pollutant. In many cases more localized assessments, including monitoring and modeling, may be needed to better characterize local-level risk. The points below highlight limitations to consider when looking at the results:
The following are important specific limitations to recognize:
A more detailed explanation of each of these limitations can be found in Chapter 7 of the TMD.