923.45 NONACCEPTABLE WASTEWATER AND INDUSTRIAL PRETREATMENT.
   (a)    The City shall make and enforce rules and regulations establishing the types and characteristics of wastewater, industrial wastes and other matters which shall be discharged into the sanitary sewerage system, the types and characteristics of wastewater and industrial wastes admissible to the system only after pretreatment, requisites for pretreatment, and otherwise governing the discharge of wastewater, industrial wastes and other matters into the system in interest of safety and efficient operation of the wastewater treatment plant. Applicable industrial pretreatment conditions and industrial pretreatment regulation, as promulgated under Section 307(b) and (c) of the Clean Water Act, are hereby incorporated in this chapter and made a part thereof. National Categorical Pretreatment Standards, as promulgated by the U.S. Environmental Protection Agency and as adopted hereinafter, shall be met by all discharges of the regulated industrial categories. An application for modification of the National Categorical Pretreatment Standards may be considered for submittal to the regional administrator by the authority when the authority's wastewater treatment system achieves consistent removal of the pollutants as defined by 40 Code of Federal Regulations 403.7.
   (b)    An industry must, upon application for sewer service, present to the City a tabulation of the chemical analysis of the wastes to be discharged to wastewater system and the volume of such wastes, or if this is not available, the expected waste analysis based upon similar processes now in operation.
   (c)    In cases where the character of wastewater or industrial waste from any manufacturing or industrial plant, building or premises is such that it will damage the sewerage system or cannot be treated satisfactorily at the wastewater treatment plant, the City shall compel such users to dispose of such waste and prevent it from entering the sewerage system.
   (d)    In cases where the character of the wastewater or industrial waste from any manufacturing or industrial plant, building or premises is such that it imposes an unreasonable burden upon the wastewater collection, pumping or treatment works greater than that imposed by the average wastewater entering the sewerage system, the City may: Compel such manufacturing or industrial plant, building or premises to pretreat such wastewater in such manner as specified by the City before discharging it into the sewerage system; require flow control or equalization of such wastes so as to avoid any slug loads or excessive loads that may be harmful to the treatment work; and/or require payment of a surcharge on any such flows or loadings discharged to the treatment works to cover the additional costs of having capacity for and treating such wastes.
   (e)    The discharge of non-acceptable industrial wastewater into the sewerage system, whether directly or indirectly, is prohibited. Wastewater shall be deemed non-acceptable when the concentration of harmful or toxic substances in the wastewater exceeds certain prescribed tolerable limits. Toxic or harmful substances include, but are not necessarily limited to, the following:
Toxic or Harmful Substances
                             Tolerable Limits
Arsenic
0.2
mg/1
Barium
1.0
mg/l
Boron
5.0
mg/l
Cadmium
0.1
mg/l
Chromium +3
0.5
mg/l
Chromium +6
0.5
mg/l
Cobalt
1.0
mg/l
Copper
0.5
mg/l
Cyanide (HCN)
0.5
mg/l
Fluoride
5.0
mg/l
Iron
5.0
mg/l
Lead
0.5
mg/l
Mercury
0.02
mg/l
Molybdenum
5.0
mg/l
Nickel
2.0
mg/l
Phenols
5.0
mg/l
Selenium
0.10
mg/l
Silver
0.03
mg/l
Sulfides
50.0
mg/l
Total Dissolved Solids
1,500.0
mg/l
Tungsten
5.0
mg/l
Zinc
2.0
mg/l
Radioactive Substances
Gross Beta activity (in the known absence of strontium and Alpha emitters)-1,000 micro curies per liter
   The preceding list of toxic or harmful substances is subject to revision as required to meet current water quality standards imposed by state or federal agencies. In special cases involving low volume users, the concentration of toxic or harmful substances in the wastewater may be exceeded if it is determined by the City that the total pounds of toxic or harmful substances discharged to the wastewater system are not harmful to or will not interfere with the wastewater treatment process or will not violate water quality or effluent standards.
   (f)   No person shall discharge or cause to be discharged, either directly or indirectly to the sewerage system, any of the following described substances, materials, waters or wastes:
      (1)    Any liquid or vapor having a temperature higher than 140° F. or causing the temperature at the treatment facility to exceed 104 °F.
      (2)    Any gasoline, benzene, naphtha, fuel oil, mineral oil, or other volatile flammable or explosive liquid, solid or gas, as well as any liquids, solids, or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction to cause fire or explosion or be injurious in any way to the operation of the publicly-owned treatment works.
      (3)    Any noxious or malodorous gas or substance which, either singly or by interaction with other wastes, is capable of creating a public nuisance or hazard to life or of preventing entry into the sewers for their maintenance and repair.
      (4)    Any waters or wastes having a pH lower than 5.5 or higher than 9.0 or having any other corrosive property or causing damage or hazard to structures, equipment or personnel of the wastewater system.
      (5)    Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, hair and fleshing, entrails, lime, chemical or paint residues, cannery wastes, bulk solids, or any other solid objects or viscous substance capable of causing obstruction to the flow operation of the wastewater system.
      (6)    Any waters or wastes containing a toxic or poisonous substance in sufficient quantity to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, or create any hazard in the receiving waters of the wastewater system.
      (7)    Any water or wastes containing emulsified oil or grease exceeding, on analysis, an average of 50 milligrams per liter of oil or grease determined as total soluble matter.
      (8)    Any garbage that has not been properly shredded to a degree that all particles will be carried freely under the flow conditions of the sewer and with no particle greater than 1/2 inch in any dimension.
      (9)    Any water or wastes containing suspended solids of such character or quality that unusual attention or expense is required to handle such materials at the wastewater treatment plant, or having a chlorine demand greater than 25 parts per million.
      (10)    Any water or wastes discharged in large enough quantities to cause a violation of the City's NPDES permit or to make the sludge unsuitable for reclamation.
      (11)    Any water or wastes discharged in large enough quantities to cause the effluent from the treatment works to be objectionably colored.
      (12)    Radioactive wastes or isotopes of such half-life or concentration as may exceed limits in compliance with applicable state or federal regulations.
      (13)    Any slug load which shall mean any pollutant including oxygen demanding pollutants (BOD, etc.) released in a single extraordinary discharge episode of such volume or strength as to cause interference with or to the publicly-owned treatment works.
   The above list is subject to revisions as required to meet current water quality standards imposed by the state or federal agencies.
   (g)    No statement contained in this section shall be interpreted as preventing any special agreement or arrangement between the City and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the City for treatment. In all such cases, the provisions set forth in this code establishing sewer service charges will be governing factors in any contracts entered into, and no special agreement between the City and any industrial concern shall violate any pretreatment standards and requirements.
   (h)    (1)   Grease, oil and sand interceptors shall be provided when, in the opinion of the City of Oxford and/or the Butler County Health Department they are necessary for the proper handling of liquid wastes containing grease in excessive amounts or any flammable wastes, sand and other harmful ingredients except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be located as to be readily and easily accessible for cleaning and inspection.
      (2)   Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changed s in temperature. They shall be of substantial construction, watertight, and equipped with easily removable covers which when bolted in place shall be gastight and watertight. Where installed, all grease, oil, and sand interceptors shall be maintained by the owner at his expense in continuous efficient operation at all times.
   (i)    No person, firm or corporation shall be permitted to connect to or discharge wastewater to the Oxford, Ohio, wastewater system unless it has been determined by the City that there is sufficient capacity in the system to collect, convey and treat the proposed wastewater discharge of such person, firm or corporation.
(Ord. 3261. Passed 12-17-13.)