Grease, oil and sand interceptors shall be provided by and at the
expense of a property owner when they are necessary for the proper
handling of liquid wastes containing grease in excessive amounts,
or containing any flammable wastes, sand and other harmful ingredients,
except that such interceptors shall not be required for private living
quarters or dwelling units. All interceptors shall be of a type and
capacity sufficient to meet the needs of the facility and shall be
located as to be readily and easily accessible for cleaning and inspection.
Grease and oil interceptors shall be constructed of impervious materials
capable of withstanding abrupt and extreme changes in temperature.
They shall be of substantial construction, watertight and equipped
with easily removable covers which, when bolted in place, shall be
gas-tight and watertight.