In SADA, five land use scenarios are considered: residential, recreational, industrial, excavation, and agricultural. The exposure pathways are grouped by soil-based exposure pathways (soil, and sediment) and by water-based exposure pathways (surface water and groundwater). The tables presented for each pathway list the default values that are in SADA. They can be changed by the user as necessary to reflect updated guidance or site-specific conditions. References are also provided for the risk equations.