Sec. 26.08.04.04. Sewage Treatment Works

A. The person holding the permit for publicly owned treatment works or other sewage treatment works shall provide the Department with a notice concerning:

(1) The introduction of pollutants into these treatment works from any discharge of industrial waste for which a State discharge permit would be required if the discharge were made directly to the waters of the State; or

(2) Any substantial change in volume, character, or concentration of pollutants from any discharge of industrial waste being introduced into the treatment facilities.

B. The notice shall include the following:

(1) The quantity and quality of the discharge; and

(2) The anticipated impact of the discharge on the quantity and quality of the permittee's discharge.

C. Level of Required Treatment.

(1) Secondary Treatment. Secondary treatment shall be required as a minimum for sewage treatment works discharging into any waters of the State.

(2) Special Treatment Requirements for Discharge to Shellfish Harvesting Waters.

(a) Treatment sufficient to afford protection for shellfish harvesting waters shall be required for all sewage treatment works discharging into Class II waters.

(b) This treatment may require a higher level of secondary treatment or advanced waste treatment.

(c) These treatment works shall incorporate a bypass control system, including a minimum 24-hour emergency holding facility, and shall provide for biocide residual control.

(3) Advanced Waste Treatment Required. Advanced waste treatment as determined by waste load allocation shall be required for all sewage treatment works with a design capacity exceeding 1 million gallons per day and discharging into water quality limited waters. Advanced waste treatment may also be required for smaller sewage treatment works where the Department determines that this level of treatment is necessary.

(4) Special Advanced Wastewater Treatment Requirements. An effluent limitation of 2 milligrams/liter total phosphorus shall be required for all facilities discharging more than:

(a) 0.5 million gallons per day to the Chesapeake Bay and its tributaries above the Baltimore Harbor; and

(b) 10 million gallons per day in the vicinity of Baltimore Harbor to the Bay Bridge.