According to the County of Simcoe Official Plan definitions, a D-4 Study is a study required to evaluate the presence and impact of any adverse effects or risks
to health and safety and any necessary remedial measures necessary for a proposed development
in compliance with the Guideline D-4 including, but not limited to, ground and surface water
(hydrogeology and hydrology), noise, odour, and dust, methane gas migration, traffic impact, land
use compatibility, and other studies considered appropriate.
For more information D-4s, and D-4 Studies, please visit the Solid Waste Department's D4 Information webpage.