Grease, oil and sand interception. Grease, oil and
sand interceptors shall be provided when, in the opinion of the Authority
or the Manager of Water Resources, they are necessary for the proper
handling of wastewater containing excessive amounts of grease and
oil, or sand, except that such interceptors shall not be required
for residential users. All interception units shall be of type and
capacity approved by the Authority and the Manager of Water Resources,
and shall be so located as to be easily accessible for cleaning and
inspection. Such interceptors shall be inspected, cleaned and repaired
regularly, as needed, by the user at the user's expense.