931.01 DEFINITIONS.

   Unless the context specifically indicates otherwise, the meaning of the terms used in this chapter shall be as follows:

   (a)   "Sewage works" means all the facilities for collecting, pumping, transporting, treating and disposal of sanitary sewage and industrial wastes.

   (b)   "Sewer" means a pipe or conduit for carrying sewage.

   (c)   "Sanitary sewer" means a sewer which carries sanitary sewage and/or industrial wastes and to which storm, surface and ground waters are not intentionally admitted.

   (d)   "Storm sewer" or "storm drain" means a sewer which carries stormwater, surface water, drainage and some industrial water discharges, such as cooling and air conditioning waters, but excludes sanitary sewer and polluted industrial wastes.

   (e)   "Combined sewer" means a sewer receiving both surface runoff and sanitary sewage and/or industrial wastes.

   (f)   "Sewage treatment plant" means any device and/or structure and facilities used for treating of sanitary sewage and industrial wastes.

   (g)   "Sewage" means any combination of water-carried wastes from residences, buildings, industrial establishments, institutions, manufacturing plants, processing plants, commercial establishments, or other places in which such wastes are produced, together with such ground, surface, storm or other water as may be present.

   (h)   "Industrial waste" means any liquid substance rejected or escaping from an industrial, manufacturing, trade or business process as distinct from sanitary sewage.

   (i)   "Garbage" means solid waste from the preparation of cooking and dispensing of food and from the handling, storage and sale of produce.

   (j)   "Properly shredded garbage" means garbage which has been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-half inch in any dimension.

   (k)   "Biochemical oxygen demand (B.O.D.)" means the quantity of dissolved oxygen required for biochemical oxidation of decomposable organic matter under aerobic conditions in a period of five days at a temperature of twenty degrees Centigrade, expressed in parts per million by weight. Such B.O.D. shall be determined as described under the heading "Biochemical Oxygen Demand" in the "Standard Methods for Examination of Water, Sewage and Industrial Wastes" (latest edition), as published jointly by the American Public Health Association, the American Water Works Association and the Federation of Sewage and Industrial Wastes Association.

   (l)   "Suspended solids" means the dry weight of the solids physically suspended in a flow of sewage, industrial waste or water as determined by the method of determining suspended matter described under "Suspended Matter" in the "Standard Methods for Examination of Water, Sewage and Industrial Wastes" (latest edition), as published jointly by the American Public Health Association, the American Water Works Association and the Federation of Sewage and Industrial Wastes Association, and expressed as parts per million by weight.

   (m)   "pH" means the logarithm of the reciprocal of the weight of hydrogen ions in grams per liter of the solution.

   (n)   "Natural outlet" means any outlet into a watercourse, ditch, pond, lake or other body of surface or ground water.

   (o)   "Person" means any individual, firm, company, association, society, corporation or group.

   (p)   "Private well" means any well owned by any person for his private use in providing water for any purpose whatever.

   (q)   "Records" means books, documents, papers, electronic media, apparatus, data, readings, records of analysis, plans or graphs.

   (r)   "Categorical pretreatment standards" means national pretreatment standards specifying quantities or concentrations of pollutants or pollutant properties which may be discharged or introduced into a POTW by specific industrial dischargers.

   (s)   "Other wastes" means decayed wood, sawdust, shavings, bark, lime, refuse, ashes, garbage, offal, tar, chemicals and all other substances except sewage and industrial wastes.

   (t)   "POTW" means any sewage treatment works and the sewers and conveyance appurtenances discharging thereto, owned and operated by the City.

   (u)   "Act" means the Federal Water Pollution Control Act (33 U.S.C. 1251 et seq.) as amended by the Federal Water Pollution Control Act Amendments of 1972 (PL-92-500) and subsequent amendments.

   (v)   "Control authority" means the City of Hamilton.

   (w)   "Pretreatment" means any treatment of wastewaters to remove incompatible pollutants from industrial sources before introduction into the POTW.

   (x)   "Industrial discharger" as defined in the United States Environmental Protection Agency (USEPA) Rules and Regulations 40 Code of Federal Regulations (CFR) 35.905-8 as may be amended from time to time, means any nonresidential user of the POTW identified in the Standard Industrial Classification Manual, 1972, Office of Management and Budget, as amended and supplemented under the following divisions.

      (1)   Division A, Agriculture, Forestry and Fishing;

      (2)   Division B, Mining;

      (3)   Division D, Manufacturing;

      (4)   Division E, Transportation, Communications, Electric, Gas and Sanitary Services;

      (5)   Division I, Services.

   (y)   "Significant industrial user" means:

      (1)   All dischargers subject to categorical pretreatment standards;

      (2)   All noncategorical dischargers that, in the opinion of the control authority, have a reasonable potential to adversely affect the POTW's operation, or that contribute a process wastestream which makes up five percent (5%) or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant, or that discharge an average of 25,000 gallons per day or more of process wastewater to the POTW.

   (z)   "Wastewater" means industrial waste, or sewage or any other waste including that which may be combined with ground water, surface water or storm water, that may be discharged to the POTW.

   (aa)   "National pollution discharge elimination system (NPDES)" means the national system for the issuance of permits under Section 402 of the Act and includes any state or interstate program which has been approved by the Administrator, in whole or in part, pursuant to Section 402 of the Act.

   (bb)   "Slugload" means any substance released in a discharge at a rate and/or concentration which causes interference to a POTW.

   (cc)   "Pollutant" means any substance which upon exposure to or assimilation into any organism will cause adverse effects such as cancer, genetic mutations or physiological manifestations, as defined in standards issued pursuant to Section 307(a) of the Act.

   (dd)   "Indirect discharge" means the discharge or the introduction of nondomestic pollutants from a source regulated under Section 307(b) or (c) of the Act, into a POTW.

   (ee)   "Interference" means a discharge which, alone or in conjunction with a discharge or discharges from other sources, both:

      (1)   Inhibits or disrupts the POTW, its treatment processes or operations, or its sludge processes, or disposal;

      (2)   Therefore is a cause of a violation of any requirement of the POTW's NPDES permit (including an increase in magnitude or duration of a violation; or the prevention of sewage sludge use or disposal.

   (ff)   "New sources" means any building, structure, facility or installation from which there is or may be a discharge of pollutants, the construction of which commenced after the publication of the proposed pretreatment standards under Section 307(c) of the Act, providing:

      (1)   The construction is carried out at a site at which no other source is located.

      (2)   The construction totally replaces the process or production equipment that causes the discharge of pollutants at an existing source.

      (3)   Where the production or wastewater generating process of the constructed facility is substantially independent of an existing source at the same site.

   (gg)   "Passthrough" means a discharge which exits the POTW into waters of the United States in quantities or concentrations which, alone or in conjunction with a discharge from other sources, is a cause of a violation of any requirement of the POTW's NPDES permit (including an increase in the magnitude or duration of a violation.

   (hh)   "Shall" means mandatory; and

   (ii)   "May" means permissive.

   (jj)   "Wastewater discharge permit" means the document issued to a significant industrial user by the City Manager or his designee which authorizes and controls the discharge of process wastewater to the POTW.

   (kk)   "Best Management Practices or BMP's" means schedules of activities, prohibitions or practices, maintenance procedures, and other management practices to implement the prohibitions listed in 40 CFR 403.5 (a)(1) and (b), as may be amended from time to time. BMPs include treatment requirements, operating procedures, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage of raw materials storage. BMP's also include alternative means (i.e. management plans) of complying with or in place of certain established categorical Pretreatment Standards and effluent limits.
(Ord. 2011-4-30. Passed 4-27-11.)

   (ll)   “Pretreatment Requirements” means any substantive or procedural requirement related to Pretreatment, other than a National Pretreatment Standard, imposed on an Industrial User. (Ord. 2014-3-21. Passed 3-12-14.)