Outside areas other than roof areas may be drained to a sewer and when paved shall be so drained where necessary to avoid the discharge of water onto adjoining premises. Paved areas of 400 square feet or less where connected to the sewer shall be provided with trapped connections before connecting to any sanitary sewer or combined sewer, with traps placed where not subject to frost. Outside areas exceeding 400 square feet (37.2 m2), and not more than 5,000 square feet (1,524 m2), where connected to sewers, shall be connected through a catchbasin, not less than 3 feet (915 mm) in diameter and not less than 3 feet (915 mm) deep below the bottom of the trap. Areas of more than 5,000 square feet (1,524 m2) shall be provided with a catchbasin not less than 4 feet (1,220 mm) in diameter and not less than 3 feet 6 inches (1,067 mm) deep below the bottom of the trap. To the extent possible, no sheet flow or discharge of stormwater that creates a public hazard or nuisance shall be allowed to adjacent private property or the public way.
(Amend Coun. J. 7-29-15, p. 3537, § 4)