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All grease interceptors, separators and catch basins located within buildings shall be constructed of precast concrete, concrete with the bottom, sides and baffles poured monolithically, heavy cast-iron or equally durable metal, fiberglass or high-density polyethylene, and shall be vented as provided with a gas tight metal cover, securely fastened.
(Amend Coun. J. 7-29-15, p. 3537, § 4)