(A) No user shall contribute or cause to be contributed directly or indirectly, any pollutant or wastewater which will interfere with the operation or performance of the systems. These general prohibitions apply to all users of the systems whether or not the user is subject to national categorical pretreatment standards or any other federal, state or local pretreatment standards or requirements. A user may not contribute the following substances to any systems, including any POTW receiving county wastewater:
(1) Any liquids, solids or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious in any other way to the system or to the operation of the POTW. At no time, shall two successive readings on any explosion hazard meter, at the point of discharge into the system (or at any point in the system) be more than 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides and any other substances which the YCWSD, the operator of the POTW, the state or EPA has notified the user is a fire hazard or a hazard to the system, and any waste streams with closed cup flashpoint of less than 140° F or 60° C the test methods specified in 40 C.F.R. Part 262.21.
(2) Solid or viscous substances which may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater treatment facilities such as, but not limited to: grease, garbage with particles greater than ½ inch in any dimension, animal guts or tissues, paunch manure, bones, hair, hides or fleshing, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes;
(3) Any wastewater having a pH less than 5.0 unless the POTW is specifically designed to accommodate the wastewater, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment and/or personnel of the POTW;
(4) Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW, or to exceed the limitation set forth in a categorical pretreatment standard. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to § 307(a) of the Act;
(5) Any noxious or malodorous liquids, gases or solids which either singly or by interaction with other wastes are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair;
(6) Any substance which may cause the POTW's effluent or any other product of the POTW such as residues, sludges or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case, shall a substance discharge to the POTW cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under § 405 of the Act; any criteria, guidelines or regulations affecting sludge use or disposal developed pursuant to the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act or state criteria applicable to the sludge management method being used;
(7) Any substance which will cause the POTW to violate its NPDES and/or state disposal system permit or the receiving water quality standards;
(8) Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions;
(9) Any wastewater having a temperature which will inhibit biological activity in the POTW treatment plant resulting in interference, but in no case wastewater with a temperature at introduction to the POTW which exceeds 40° C (104° F) unless the POTW treatment plant is designed to accommodate the temperature and approves alternate temperature limits;
(10) Any pollutant, including oxygen demanding pollutants, (BOD, and the like) released at a flow rate and/or pollutant concentration, which a user knows or has reason to know will cause interference to the POTW. In no case shall a slug load have a flow rate or contain concentration or qualities of pollutants that exceed for any time period longer than 15 minutes more than five times the average 24-hour concentration, quantities or flow during normal operations;
(11) Any wastewater containing any radioactive wastes or isotopes or the half-life or concentration as may exceed limits established by the YCWSD in compliance with applicable state or federal regulations;
(12) Any wastewater which causes a hazard to human life or creates a public nuisance;
(B) When YCWSD or the POTW determines that a user(s) is contributing to the POTW any of the above enumerated substances in amounts as to interfere with the operation of the POTW, YCWSD shall:
(1) Advise the user(s) of the impact of the contribution on the POTW; and
(2) Develop effluent limitation(s) for user(s) to correct the interference with the POTW.
(C) No statement in this section shall be construed as preventing any special agreement or arrangement between YCWSD, any POTW and any user(s) whereby an industrial waste of unusual strength or character may be admitted into the POTW by YCWSD after approved pretreatment.
(‘77 Code, § 7-103) (Ord. 1585, passed 10-21-85; Am. Ord. 102, passed 1-21-02)