To help address the Food Quality Protection Act of 1996, a physically-based, probabilistic model has been developed to quantify and analyze exposure and dose to pesticides via multiple routes and pathways. To illustrate model capabilities, a case study for young children and chlorpyrifos was conducted.  Three post-application time periods (7 days). Despite current data limitations and model assumptions, the case study predicts exposure and dose estimates that compare well to measurement studies, and provides insights to the relative importance of exposure routes and model inputs.