The Department of Environmental Protection (MassDEP) Major Facilities datalayer is a statewide point dataset containing the location of a subset of facility types regulated by MassDEP’s Bureau of Waste Prevention (BWP). The layer is stored in ArcSDE as BWPMAJOR_PT. In a preliminary effort to begin locating facilities regulated by MassDEP, the BWP chose to locate facility types having the greatest potential environmental significance. At this time, the following facility types have been located: - Large Quantity Generators of Hazardous Waste (LQG) - Large Quantity Generator of MA-regulated Hazardous Waste (LQG_MA) - Large Quantity Generator of EPA/RCRA-regulated Hazardous Waste (LQG_RCRA) - Large Quantity Toxic Users (LQTU) - Hazardous Waste Recyclers (HWR) - Hazardous Waste Treatment, Storage and/or Disposal Facilities (TSDF) - Facilities with Air Operating Permits (AIR) - Facilities with Groundwater Discharge Permits (GWD) - Facilities with Surfacewater Discharge Permits (SWD).

Please note: the Solid Waste Land Disposal polygon datalayer contains point datalayers of active and historical solid waste Combustion Facilities, active Handling/Transfer Stations and Compost Sites. Active SW Combustion Facilities are a subset of the Air Operating Permits in this BWP Major Facilities layer.

See the Location Documentation Table (BWPMAJOR_PT_LDT) for documentation re: the types of features mapped, methods and sources used.