Section 11-50-63 - Sewage, other liquid waste, and rainwater(a) A sewage holding tank in a mobile food establishment shall be: (1) Sized fifteen per cent larger in capacity than the water supply tank; and(2) Provided with a tank bottom that is sloped down to an outlet with a shut-off valve to permit complete drainage of the tank, except for those tanks that are readily removable.(b) Food establishment drainage systems, including grease traps, that convey sewage shall be designed and installed as specified in section 11-50-61(b)(1).(c) Backflow prevention. (1) Except as specified in paragraphs (2), (3) and (4), a direct connection may not exist between the sewage system and a drain originating from equipment in which food, portable equipment, or utensils are placed;(2) Paragraph (1) does not apply to floor drains that originate in refrigerated spaces that are constructed as an integral part of the building;(3) If allowed by law, a warewashing machine may have a direct connection between its waste outlet and a floor drain when the machine is located within five feet of a trapped floor drain and the machine outlet is connected to the inlet side of a properly vented floor drain trap;(4) If allowed by law, a warewashing or culinary sink may have a direct connection.(d) If used, a grease trap shall be located to be easily accessible for cleaning.(e) Sewage shall be conveyed to the point of disposal through an approved sanitary sewage system or other system, including use of sewage transport vehicles, waste retention tanks, pumps, pipes, hoses, and connections that are constructed, maintained, and operated according to law.(f) Sewage and other liquid wastes shall be removed from a mobile food establishment at an approved waste servicing area or by a sewage transport vehicle in such a way that a public health hazard or nuisance is not created.(g) A tank for liquid waste retention shall be thoroughly flushed and drained in a sanitary manner during the servicing operation.(h) Sewage shall be disposed through an approved facility that is: (1) A public sewage treatment plant; or(2) An individual sewage disposal system that is sized, constructed, maintained, and operated according to law.(i) Condensate drainage and other nonsewage liquids and rainwater shall be drained from point of discharge to disposal according to law. [Eff FEB 24 2014] (Auth: HRS § 321-11) (Imp: HRS § 321-11)