Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart C - Protection of Natural Resources › Article I - Land Resources › Chapter 73 - STANDARDS FOR ONLOT SEWAGE TREATMENT FACILITIES › DOSING AND DISTRIBUTION REQUIREMENTS › Section 73.46 - Dosing pumps, siphons and lift pumps

Current through Register Vol. 54, No. 28, July 13, 2024
(a) Dosing pumps for all onlot sewage
						disposal systems except individual residential spray irrigation systems shall
						meet the following specifications:
(1) The
						pump shall be sized to deliver a flow in gpm equal to or greater than the
						combined flows from all discharge holes in the laterals when operating at
						designed level of head and shall be rated by the manufacturer for handling of
						sewage effluent.
(2) The intake of
						the dosing pump shall be at least 6 inches from the bottom of the tank. The
						intake of any dosing pump shall be at a lower elevation than the lowest
						lateral.
(3) Pumps may not be
						suspended above the bottom of the tank by chains or similar
						equipment.
(4) A disconnect shall
						be incorporated into the piping within the dosing tank for ease of pump
						removal.
(5) An effective warning
						device, as described in §
													73.62(c)
						(relating to standards for holding tanks), shall be installed in the dosing
						tank to indicate failure of the pump or siphon. Electrically operated warning
						systems shall be on a circuit and breaker separate from the pump.
(6) A siphon or other discharge mechanism may
						be substituted for a pump where site conditions permit the use of a gravity
						flow device, if the average discharge rate of the device meets the requirements
						of paragraph (1).
(7) A copy of the
						performance curve of the pump or discharge specifications for the siphon to be
						used shall be attached to the system design. A copy of the manufacturer's
						specification showing that the pump is designed to handle sewage or sewage
						effluent shall also be attached to the system design.
(8) When an aeration tank is used which
						results in a periodic pump discharge from the treatment tank, the discharge
						mechanism may be substituted for a dosing tank and pump if the periodic
						discharge rate meets the criteria in subsections (a)(1) and (b)(2) and §
													73.45(2)
						(relating to dosing tanks).
(9)
						Pumps or siphons serving systems having total absorption areas greater than
						2,500 square feet shall have a minimum discharge capacity at least two times
						the estimated peak flow for the facility served.
(10) When an establishment produces more than
						50% of its total daily flow during a peak flow period, the minimum dose volume
						shall equal the anticipated flow during the peak period.
(11) Pumps employed for the purpose of
						lifting effluent to a higher elevation may not be deemed dosing pumps when the
						system does not meet the criteria of §
													73.43 (relating to pressurized
						distribution). Pumps for this purpose shall have a discharge capacity at least
						two times the estimated peak flow of the facility served when operating at
						designed level of head, but at least 5 gpm and shall be rated by the
						manufacturer for handling sewage effluent.
(12) Siphon discharge lines shall be equipped
						with an observation port. The access to the observation port shall be extended
						to grade, capped and secured to prevent unauthorized entry.