Consolidated Human Activity Database

The US-EPA Consolidated Human Activity Database (CHAD) (US-EPA 2007b) contains data obtained from preexisting human activity studies that were collected at city, state, and national levels. CHAD is intended to be an input file for exposure/intake dose modeling and/or statistical analysis. CHAD is a master database providing access to other human activity databases using a consistent format. This facilitates access and retrieval of activity/and questionnaire information from those databases that US-EPA currently has access to and uses in its various regulatory analyses undertaken by program offices. 

US-EPA. 2007b. Consolidated Human Activity Database, http //www.epa.gov/chadnetl/ van Drooge, H.L. and A.G. van Haelst. 2001. Probabilistic Exposure Assessment is Essential for Assessing Risks - Summary of Discussions. Ann. Occup. Hyg. 45 S159-S162. 

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