What emissions inventory data was used to establish the Air Toxics Priority List?
The emissions inventory data was obtained from the Maine DEP’s 2005 annual emissions inventory. The inventory is a combination of emissions information submitted to the Maine DEP by facilities (“point sources”) and emission estimates calculated by the Maine DEP based on data such as population and the level of activity in various business and industrial sectors. Activity level data is obtained from various state and federal agencies and trade associations. The Maine DEP’s point source inventory for toxic pollutants differs from the Environmental Protection Agency’s Toxics Release Inventory (TRI). Some facilities exempt from reporting to TRI are required to report emissions to the Maine DEP, and several toxic pollutants that are not reported to TRI must be reported to the Maine DEP (e.g. hydrogen sulfide). Some emissions may be reported to the Maine DEP as belonging to a group of compounds, while they are reported individually to TRI (e.g. polycyclic organic matter and anthracene). This
