(a) No person shall discharge or cause to be discharged to any sanitary sewer any unpolluted water such as, but not limited to, storm water, ground water, roof water runoff, subsurface drainage, footer drain discharge, or nonresidential cooling or noncontact water. Such waters from limited areas, which may be polluted at times, may be discharged to a sanitary sewer by permission of the Safety-Service Director.
(1) In the event of violation of the aforesaid prohibition, the Safety-Service Director shall issue a written order to the person discharging such unpolluted waters for the removal of unpolluted water connections to such sanitary sewer within ninety (90) days after the service of such order. A written order shall be served on such person by personal service or by certified or registered mail, return receipt requested.
(2) Discharge of unpolluted waters, other than that exempted above, shall be discharged to such sewers specifically designed as combined sewers or storm sewers or to a natural outlet approved by the Safety-Service Director and other governmental agencies. Unpolluted industrial cooling water or process water may be discharged on approval of the Safety-Service Director and other governmental agencies to a storm sewer, combined sewer or natural outlet.
(b) No person (applies to all users) shall discharge or cause to be discharged, directly or indirectly, any of the following described waters or wastes to any public sewers:
(1) Pollutants which cause a fire or explosion hazard in either the collection system or the POTW which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction to cause fire or explosion or maybe injurious in any other way to the operation of the POTW.
(2) Any waters or wastes having a pH lower than 6.0 or greater than 10.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personal of the wastewater system.
(3) Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers or other interferences with the proper operation of the wastewater facilities.
(4) Wastewater having a temperature which will inhibit biological activity in the POTW resulting in interference.
(5) Wastewater containing petroleum oil, nonbiodegradable cutting oils, products of mineral oil origin or floatable oils, fat, wax, or grease, in concentrations exceeding fifty milligrams per liter or in amounts which can pass through or cause interference.
(6) Any garbage that has not been properly shredded or of such quantity that can cause blockage in the receiving sewers or interference with operations of the POTW.
(7) Any noxious or malodorous liquids, gases, or solids which either singly or by interaction are capable of creating a public nuisance, hazard to life or sufficient to prevent entry into the sewers for the purpose of their maintenance and repair, or interferes with the proper operation of the POTW.
(8) Any wastewater containing any radioactive wastes or isotopes exceeding any applicable state or federal regulations.
(9) Any substance which will cause the POTW's effluent or treatment residues, or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process, or would cause the POTW to violate its NPDES permit.
(10) Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction to injure or interfere with any wastewater process, or constitute a hazard to humans or animals, or to exceed the limitations set forth in the national categorical pretreatment standards.
(11) Any slugload, which shall mean any pollutant, including oxygen demanding pollutants (BOD, CBOD, etc.) released in a single extraordinary discharge episode of such volume or strength as to cause interference to the POTW.
(12) Any substance with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions.
(c) No user shall discharge wastewater containing concentrations of the following pollutants, exceeding the following values:
Material | Concentration (mg/l-total) |
Arsenic | 0.6 |
Barium | 4.5 |
Cadmium | 0.05 |
Chromium, Total | 0.8 |
Chromium, Hex | 0.07 |
Chlorides | 1000.0 |
Copper | 1.1 |
Cyanide, Total | 0.5 |
Lead | 0.69 |
Mercury | Non-Detect or Best Management Practices (BMPs) |
Molybdenum | 0.3 |
Nickel | 1.0 |
Oil and Grease | 390 |
Phenols | 1.0 |
Selenium | 0.8 |
Silver | 0.2 |
Sulfides | 50.0 |
Zinc | 2.6 |
(1) Best Management Practices (BMPs)- The Safety-Service Director or Waste Water Superintendent may develop BMPs either by ordinance or in individual wastewater discharge permits to implement Local Limits.
(2) The City may annually update these limits by directing the Safety-Service Director to develop local limits.
(3) The City may impose mass limitations on industrial users where the imposition of such limitations is deemed necessary and appropriate.
(4) The City may convert mass per unit of production limits in pretreatment standards to equivalent mass per day or concentration limits. These equivalent limits shall be deemed pretreatment standards which industrial users will be required to comply with in lieu of promulgated standards.
(d) Accidental Discharges.
(1) Each User shall provide protection from accidental discharge of prohibited or regulated materials or substances established by this chapter. Where necessary, facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the user's cost and expense. Detailed plans showing facilities and operating procedures to provide this protection shall be submitted to the City for review and shall be approved by the City before construction of the facility. No user who discharges to the POTW shall be permitted to introduce pollutants into the system until accidental discharge protection procedures have been approved by the City. Review and approval of such plans and operating procedures by the City shall not relieve the user from the responsibility to modify its facility as necessary to meet the requirements of this chapter. The permit to discharge shall require access to inspect the control facility.
(2) Users shall notify the City immediately upon the occurrence of a "slugload," or accidental discharge of substances prohibited in this chapter. The notification shall include the location of discharge, date and time thereof, type of waste, concentration and volume, and corrective actions. Any user who discharges a slugload of prohibited material shall be liable for any expense, loss or damage to the POTW, in addition to the amount of any fines imposed on the City on account thereof under state or federal law.
(3) Signs shall be permanently posted in conspicuous places on the user's premises advising employees whom to call in the event of a slug or accidental discharge. Employers shall instruct all employees who may cause or discover such a discharge with respect to emergency notification procedure.
(Ord. 10-16. Passed 4-26-16.)
(Ord. 10-16. Passed 4-26-16.)