1. Requirements. Grease, oil, and sand interceptors, as described by the International Plumbing Code, shall be required of any user when, in the opinion of the POTW Manager, they are necessary for the proper handling of liquid wastes containing grease in excessive amount, or any flammable wastes, sand and other harmful ingredients; except that such interceptors shall not be required for dwelling units. All interceptors shall be of a type and capacity approved by the POTW Manager according to plans on file in the POTW’s office and shall be located as to be readily accessible for cleaning by the user and inspection by POTW employees.

2. Construction. All grease, oil, and sand interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of a substantial construction, water tight, and equipped with easily removable covers which, when bolted in place shall be gas and watertight. The smallest grease trap or interceptor in any application will be no smaller than 20 gallons - 40 pound capacity. All outside grease traps shall be at least 750 gallon capacity. The required size and location of grease traps and interceptors shall be based on minimum and maximum flows and established as set forth in a policy adopted by the POTW. All outside grease traps will be constructed of water tight concrete and will have at least a four inch (4") inlet and a four inch (4") riser formed in the baffle. All outside traps must have POTW Manager approval prior to installation. It shall be unlawful to install any self cleaning grease trap or interceptor in any building or at any location.

3. Maintenance. Where installed, all grease, oil, and sand interceptors shall be cleaned and maintained in continuous efficient operation at all times by and at the sole expense of the user. It shall be unlawful to use any kind of emulsifier in any grease trap, interceptor, or drain in any building or at any location, unless approved in writing by the POTW.