Grease, oil and sand interceptors.

Grease, oil and sand interceptors shall be provided when, in the opinion of the Chief Plant Operator and/or Superintendent of Sewers, they are necessary for the proper handling of wastewater containing excessive amounts of grease, flammable substances, sand, or other harmful substances; except that such interceptors shall not be required for private living quarters or living units. All interceptors shall be of a type and capacity approved by the Chief Plant Operator and/or Superintendent of Sewers and shall be located to be easily accessible for cleaning and inspection. Such interceptors shall be inspected, cleaned, and repaired regularly, as needed, by the owner, at his expense.