||Development of statistical distributions or ranges of standard factors used in exposure assessments : final report /
Anderson, E. ;
Browne, N. ;
Duletsky, S. ;
Ramig, J. ;
||GCA Corp., Chapel Hill, NC. GCA Technology Div.;Environmental Protection Agency, Washington, DC. Office of Health and Environmental Assessment.
|| Office of Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency,
||EPA/600/8-85/010; EPA-68-01-6775; EPA-68-02-3997
Health risk assessment. ;
Public health ;
Body weight ;
Statistical data ;
Air pollution ;
Toxic substances ;
Air pollution effect(Humans) ;
Indoor air pollution
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||183 pages ; 28 cm
The document is intended to support EPA's Exposure Assessment Guidelines by providing data and information on standard factors that are used to calculate human exposure to toxic substances. Statistical distributions or ranges of values were developed for body weight, skin surface area, and ventilation rates. Percentile distributions of body weight were computed from the Second National Health and Nutrition Examination Survey (NHANES II) data base using a computer program that performs variance estimation of multistage sample data using the Jack-knife Repeated Replicate approach. Distributions of skin surface areas were similarly calculated from NHANES height and weight data by applying regression equations that were either located in the literature or were developed by multi-variate analysis of available measurements. Insufficient data precluded the development of distributions of ventilation rates. Minimum, maximum, and mean values of minute ventilation at three activity levels were calculated from available measurements. Activity pattern information is presented to permit the calculation of time-weighted average ventilation rates.
"EPA/600/8-85/010." "PB85-242667." Includes bibliographical references. Final report. Funded wholly or in part by the United States Environmental Protection Agency. Microfiche.