(A) General prohibitions. No user shall discharge to the POTW any pollutants which cause pass through or interference. This general prohibition and the specific prohibitions provided in division (B) below apply to each user, whether or not the user is subject to other national pretreatment standards or any national, state or local pretreatment requirements.
(B) Specific prohibitions. No industrial user shall discharge, or cause to be discharged, any of the following described pollutants, water or wastes to any public sewer:
(1) Any solid or viscous pollutants, such as construction materials, ashes, cinders, sand, metal, glass, grease, tar, plastic, wax or wood, in amounts which cause obstruction to the flow in the POTW resulting in interference;
(2) Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to, pollutants with a closed cup flashpoint of less than 140°F as determined by closed cup test methods (Pensky- Martens or Setaflash), specified in 40 C.F.R. § 261.21;
(3) Heat in amounts that will inhibit biological activity in the POTW treatment plant, resulting in interference or causing damage, but in no case heat in such quantities that the temperature exceeds 40°C (104°F) at the end of pipe prior to discharge to the POTW treatment plant;
(4) Any water or wastes that are acid or alkaline in reaction and having corrosive properties capable of causing damage or hazard to structures, equipment or city personnel. The pH of such wastes must be neutralized at all time to range between 6.0 and 10.0 at all times;
(5) Any petroleum oil, non-biodegradable cutting oil or products of mineral oil origin in amounts that will cause interference or pass through at the POTW treatment plant;
(6) Any wastewater containing biodegradable oil and grease of animal or vegetable origin exceeding 200 mg/l;
(7) Any slug discharge, which shall mean any pollutant, including oxygen demanding pollutants (BOD and the like), released in a discharge at a flow rate and/or pollutant concentration which will cause interference with the POTW;
(8) Pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause acute health and safety problems to personnel, or prevent entry into the sewerage system for purposes of inspection, maintenance, or monitoring activities;
(9) Any liquids or wastes containing radioactive materials or isotopes;
(10) Any trucked or hauled wastes, except septic wastes of residential origin, which shall be discharged only at the POTW treatment plant septic waste collection tank, and only by haulers approved by the city. Discharge of any other wastes, or of septic wastes at any other location, without the express approval or permission of the Superintendent shall be considered a violation subject to enforcement action, including fines and penalties allowed under this chapter;
(11) Any wastewater containing surfactants or other foam-causing material in quantities creating foaming problems at the POTW treatment plant or in the receiving waters;
(12) Any wastewater containing an objectionable color not removed in the treatment process, caused by, but not limited to, dye wastes and vegetable tanning solutions;
(13) Any wastewater containing noxious or malodorous gases or substances capable of creating a public nuisance; and
(14) Any wastewater containing total phosphorus levels exceeding 100 mg/l.
(C) Other prohibitions.
(1) No user shall discharge or cause to be discharged to any natural outlet or storm sewer within the city or in any area under the jurisdiction of said city, any sanitary wastewater or other polluted water.
(2) No user shall discharge or cause to be discharged any unpolluted wastewater, including, but not limited to, non-contact cooling water, storm water or roof runoff to any sanitary sewer.
(Prior Code, § 1054.04) (Ord. 59-1991, passed 4-8-1991; Ord. 62-1993, passed 4-26-1993; Ord. 149-2013, passed 9-9-2013; Ord. 142-2016, passed 12-12-2016)