(A) General.
(1) The admission into the public sewers for any water or wastes having:
(a) A five-day biochemical oxygen demand greater than 250 parts per million by weight;
(b) Containing more than 250 parts per million by weight of suspended solids;
(c) Containing any quantity or substances having the characteristics described in § 54.097(A) of this chapter; or
(d) Having an average daily flow greater than 25,000 gallons shall be subject to the review and approval of the Public Works Director.
(2) Where necessary in the opinion of the Public Works Director, the owner shall provide, at his or her expense, such preliminary treatment as may be necessary to:
(a) Reduce the biochemical oxygen demand to 250 parts per million and suspended solids to 250 parts per million by weight;
(b) Reduce the objectionable characteristics or constituents to within maximum limits provided in § 54.097 of this chapter; and
(c) Provide control or flow equalization of such wastes described in 300 so as to avoid any “slug” loads or excessive loads that may be harmful to the sewage works.
(B) Pretreatment facilities. When, after making such a review, the Public Works Director concludes that, before the person discharges his or her wastes into the public sewers, he or she must modify or eliminate those constituents which would be harmful to the structures, processes or operations of the sewage works or injurious to health, then the person shall either modify his or her wastes at the point of origin or shall provide and operate at his or her own expense such preliminary treatment or processing facilities as may be determined to be necessary to render his or her wastes acceptable for admission to the public sewers. Appropriate pretreatment technology includes control equipment, such as equalization tanks or facilities, for protection against “slugs” that might interfere with or otherwise be incompatible with the sewage works. Where there is reason to believe that the use of equalization tanks or other facilities which have potential for dilution is resulting in dilution, the Public Works Director may impose mass limitations on the user employing such tanks or other facilities.
(C) Prior approval of pretreatment facilities. Plans, specifications and other pertinent information relating to proposed preliminary treatment and processing facilities shall be submitted to the POTW through the Public Works Director’s office for examination and approval and no construction of such facilities shall begin until the POTW has given its written approval. Such approval shall not exempt the person from the obligation to make further reasonable adaptations of such facilities when such adaptations of such facilities prove necessary to secure the results desired. Plans, specifications and other pertinent information shall also be submitted to the Stream Pollution Control Board for approval in accordance with Stream Pollution Control Board Res. 330 I.A.C. 3.1-1 through 330 I.A.C. 3.1-3 (formerly No. SPC 15).
(D) Operation of pretreatment facilities. When such preliminary treatment facilities are provided, they shall be maintained continuously in satisfactory and effective operating condition by the person at his or her own expense and shall be subject to periodic inspection by the Public Works Director. The person shall maintain suitable operating records and shall submit to the Public Works Director such monthly summary reports of the character of the influent and effluent as the latter may prescribe. The user shall notify the Public Works Director immediately of any slug loading, as defined herein, and in accordance with §§ 54.100 and 54.999 of this chapter.
(E) Grease, oil and sand interceptors. Grease, oil and sand interceptors shall be provided when, in the opinion of the Public Works Director, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand or 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 approved by the Public Works Director, and shall be located as to be readily and easily accessible for inspection, and kept clean at all times. 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, water-tight and equipped with easily removable covers which when bolted in place, shall be gas-tight and water-tight and capable of the maximum flow rate of the pipe installed therein.
(2005 Code, § 102.21)