This general permit covers the following discharges to surface water or groundwater of the State: All new and existing discharges of treated groundwater from oil-contaminated groundwater sources.

A groundwater discharge permit, along with a refuse disposal permit, includes limitations and requirements deemed necessary to protect public health and minimize groundwater pollution in the State of Maryland. Groundwater discharge permits for rubble landfills regulate the discharge of pollutants that may be generated as a result of rain water or groundwater passing through the rubble waste in an unlined disposal cell and seeping into groundwater beneath the landfill. Rubble waste consists primarily of waste resulting from construction and demolition activities and land clearing debris. All rubble landfills constructed after July 1, 2001 are required to have liners and leachate collection systems, so groundwater discharge permits are no longer needed for new rubble landfills. However, existing unlined rubble landfills are required to maintain these permits until such time as the Department determines that a regulated discharge is no longer occurring.

Generators of hazardous waste, transporters of hazardous waste, and facilities which treat, store, or dispose of hazardous waste are required to notify the U.S. Environmental Protection Agency (EPA) and the Department before treating, storing, disposing, offering for transportation, or transporting hazardous waste. Large quantity handlers of universal waste are required to notify the Department before accumulating 5,000 kilograms of universal waste for the first time. Upon receipt of a notification, the Department assigns an EPA Identification number to the notifier through the EPA RCRAInfo database.

A generator who treat, store, dispose of, transport, or offer for transportation, special medical waste are required to notify the Department to obtain, maintain or deactivate a Maryland identification number (SMW ID).

The surface water discharge permit for oil terminals combines the requirements of the state discharge permit program and the National Pollutant Discharge Elimination System (NPDES) into one permit for oil terminal facilities that discharge storm water or hydrostatic test water to state surface waters. The permit is designed to meet federal effluent guidelines where applicable and to ensure that the discharge satisfies state water quality standards. Oil terminals receiving oil by pipeline or marine transfer that have over 5 million gallons of storage capacity must apply.

Any person who stores 10,000 gallons or more of oil intended to be used as a motor fuel, lubricant or fuel source in above ground tanks, or stores 1,000 gallons or more of used oil, who transports oil in or out of Maryland or operates an oil transfer facility must obtain this permit from the State of Maryland. An owner, operator, or a person in charge of an oil storage facility or oil handling facility that has an aboveground aggregate oil storage capacity of 10,000 gallons or greater must apply for and obtain an Individual Oil Operations Permit.

Any person who stores 10,000 gallons or more of oil intended to be used as a motor fuel, lubricant or fuel source in above ground tanks, or stores 1,000 gallons or more of used oil, who transports oil in or out of Maryland or operates an oil transfer facility must obtain this permit from the State of Maryland. An oil operations permit for treatment of oilcontaminated soils is required for anyone who stores and treats oil-contaminated soil.

Any person who stores 10,000 gallons or more of oil intended to be used as a motor fuel, lubricant or fuel source in above ground tanks, or stores 1,000 gallons or more of used oil, who transports oil in or out of Maryland or operates an oil transfer facility must obtain this permit from the State of Maryland. An owner, operator, or a person in charge of an oil storage facility or oil handling facility that delivers or transfers oil ​using a truck tank or transport with a cargo tank capacity of 500 gallons or greater, and 'To or from' any point within the State, including deliveries from out-of-State facilities must apply for and obtain an Individual Oil Operations Permit.

Any person who stores 10,000 gallons or more of oil intended to be used as a motor fuel, lubricant or fuel source in above ground tanks, or stores 1,000 gallons or more of used oil, who transports oil in or out of Maryland or operates an oil transfer facility must obtain this permit from the State of Maryland. An owner, operator, or a person in charge of an oil storage facility or oil handling facility that solidifies/stabilizes oil sludge, oil refuse, or oil mixed with other waste must apply for and obtain an Individual Oil Operations Permit.

Industrial groundwater discharge permits are issued for wastewater from vegetable and animal processing, vehicle washing, service and maintenance related activities, and other industrial process wastewaters. Processing industrial groundwater discharge permits include evaluation of soil and site suitability for a proposed land treatment system and review of plans, specifications and hydrogeologic reports submitted with permit applications.