(a) Wastes Prohibited in Sanitary Sewers. No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, cooling water, or unpolluted industrial process waters into any sanitary sewer.
(b) Unpolluted Drainage. Storm water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers, or storm sewers, or to a natural outlet approved by the Service-Safety Director. Industrial cooling water or unpolluted process waters may be discharged, upon approval of the Director, into a storm sewer, combined sewer, or natural outlet.
(c) Wastes Prohibited in Sewers. Except as hereinafter provided, no person, firm, or corporation shall discharge or cause to be discharged any of the following described waters or wastes into any public sewer:
(1) Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit, at point of discharge or causing the temperature at the treatment facility to exceed 104 degrees Fahrenheit;
(2) Any water or waste which contains more than 150 parts per million, by weight, or either soluble fats, oil, emulsions or grease;
(3) Any gasoline, benzene, naphtha, fuel oil, mineral oil, or other volatile, flammable or explosive liquid, solid, or gas;
(4) Any garbage that has not been properly shredded;
(5) Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interference with proper operation of the POTW;
(6) Any waters or wastes having a pH less than 6.0 or higher than 9.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the system;
(7) Any wastes or waters containing a toxic or poisonous substance in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, or create any hazard or pollution in the receiving waters of the POTW;
(8) Any waters or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials by the POTW, or having a chlorine demand greater than thirty parts per million;
(9) Any wastewater containing any radioactive wastes or isotopes of such half life or concentration as exceed limits established by the Director in compliance with applicable State or Federal regulations;
(10) Any noxious or malodorous liquids, gases, or solids which either singly or by interaction are capable of creating a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for their maintenance and repair;
(11) Any substance which may cause the POTW's effluent or treatment residues, sludges, or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process;
(12) Any substance which will cause the POTW to violate its NPDES Permit;
(13) Any substance with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions;
(14) Any slugload.
(15) Any wastewater which causes a hazard to human life or creates a public nuisance;
(16) Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems or public nuisance.
(17) Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than 140 degrees Fahrenheit or 60 degrees Centigrade using the test method specified in 40 CF. 261.21.
(18) Discharges of petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin as prohibited if discharged in amounts that can pass through or cause interference.
(19) Discharge trucked or hauled pollutants, including industrial and septic wastes, into any location of the sewer system or POTW at any time.
(d) Industrial Pretreatment.
(1) National Categorical Pretreatment Standards for a particular industry as promulgated by the U.S. Environmental Protection Agency pursuant to the Act, if more stringent, shall supercede the limitations imposed under this chapter. All affected users shall be notified of applicable reporting requirements, reports, and compliance dates. All industrial users are required to meet applicable categorical standards.
(2) The City reserves the right to amend this chapter to provide for more stringent limitations or requirements on discharges to the POTW where deemed necessary to meet current water quality standards imposed by the State or federal agencies;
(3) No discharger shall increase the use of potable or process water in any way, nor mix separate waste streams for the purpose of diluting a discharge as a partial or complete substitute for adequate treatment to achieve compliance with the standards set forth in this chapter;
(4) The discharge of non-acceptable industrial wastewater into the public sewer system, whether directly or indirectly, is prohibited. Wastewater shall be deemed nonacceptable 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 Substance
Arsenic
Barium
Boron
Cadmium
Chromium +3
Chromium +6
Chromium
Cobalt "A" Incorporated herein
Copper
Cyanide (HCN)
Fluoride
Iron
Lead
Mercury
Molybedenum
Nickel
Phenols
Selenium
Silver
Sulfides
Total Dissolved Solids
Tungsten
Zinc
Radioactive Substances
The preceding list of toxic or harmful substances is subject to the tolerable limits therefore and to revisions thereof as required by the most recent Bellefontaine Local Limits Technical Justification Report, which is on file in the office of the Service-Safety Director and which is incorporated herein by reference. The City may impose mass limitations on discharges to meet the requirements of this chapter or in other cases where the imposition of mass limitations is deemed appropriate by the City.
(Ord. 13-1. Passed 2-26-13.)
(5) Users must comply with the categorical Pretreatment Standards found at 40 CFR Chapter I, Subchapter N, Parts 405-471.
(6) Discharge of pollutants in which flow rate and/or pollutant concentration which will cause interference with the POTW.
(Ord. 19-82. Passed 12-10-19.)
(e) Grease, Oil, and Sand Interceptors. Grease, oil, and sand interceptors shall be provided when, in the opinion of the Director, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any inflammable wastes, sand, or other harmful ingredients, except that such interceptors are not required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Director, and shall be located as to be readily and easily accessible for cleaning inspection. 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, watertight and equipped with easily removable covers which, when bolted in place, shall be gastight and watertight.
(f) Maintenance of Interceptors. Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times.
(g) Interpretation. No statement contained in this chapter will be construed 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, subject to payment therefore by the industrial concern.
(Ord. 13-1. Passed 2-26-13.)