Grease, oil and/or sand interceptors or retainers
shall be installed by the industrial user at its own expense when,
in the opinion of the JRSB, such are necessary for the proper handling
of liquid wastes containing grease, oils and/or sand in excessive
amounts and/or any flammable wastes and/or such other harmful ingredients.
Such interceptors shall be of a type and capacity approved by the
JRSB and shall be located as to be readily and easily accessible for
cleaning by industrial users and/or for inspection by the JRSB.