SHEDS-Residential is a physically-based, probabilistic model that predicts, for user-specified population cohorts, exposures incurred in the residential environment over time via inhaling contaminated air, touching contaminated surface residues, and ingesting residues from hand- or object- to-mouth activities. To do this, it combines information on chemical usage, human activity data, environmental residues and concentrations, and exposure factors to generate time series of exposure for simulated individuals. One-stage or two-stage Monte Carlo simulation is used to produce distributions of exposure for various population cohorts that reflect the variability and/or uncertainty in the input parameters. 

• SHEDS Residential Technical Manual May 2012 (PDF)(196 pp, 5 MB, May 21, 2012)