5.0 or greater than 12.5 units;

(7) Pollutants or wastewater that would cause a violation of any statute or rule, regulation, or ordinance of any public agency or regulatory agency having jurisdiction over the discharge of wastewater from the City of Ontario's sewerage system; (8) Pollutants that interfere with the effluent or any other treatment process, residues, sludges or scums; or cause biosolids to be unsuitable for beneficial reuse, reclamation or disposal; (9) Any solid or viscous substance or other matter of such quality, size, or quantity which could cause obstruction to the flow in the sewer or be detrimental to regional treatment plant operations. These materials include any solid greater than three-eighths (3/8) inches in any dimension, including, but not limited to, animal guts or tissues, ashes, asphalt, bones, cinders, concrete, dead animals, earth, entrails, fatty acids, feathers, gas tar, glass, glass-grinding, gravel, grass clippings, grease and oil, hair, hides or fleshing, industrial process shavings, lubricating oil, metal filings, metal, milk cartons or other similar paper products either whole or ground or garbage which does not pass through a three-eighths (3/8) inch screen, mud, offal, paunch manure, paper cups, paper dishes, polishing wastes, plaster, plastics, rags, residues from refining or processing of fuel, sand, shavings, sharps, spent grains, spent hops, spent lime, stone or marble dust, straw, tar, waste paper, whole blood, diatomaceous earth, and wood. (10) Petroleum oil, non-biodegradable cutting oil, refined petroleum products, dispersed biodegradable oils, fats and greases, such as lard, tallow, vegetable oil, or products of mineral oil origin, in amounts that will cause interference or pass-through, obstruct flows within the collection system, or contributes to or causes a sanitary sewer overflow; (11) Wastewater having a temperature that will inhibit biological activity at the POTW, resulting in interference, but in no case wastewater that causes the temperature at the introduction of the POTW to exceed one hundred four degrees Fahrenheit (104°F) (forty degrees Centigrade (40°C)) unless the approval authority, upon request of the POTW, approves alternate temperature limits; (12) Pollutants, including oxygen-demanding pollutants (BOD) released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW; (13) Pollutants that cause discoloration, pass-through, interference, or any other condition which affects the quality of the POTW effluent in such a manner that receiving water quality requirements established by regulatory agencies or discharge authorization; (14) Any quantity of pesticides, polychlorinated biphenyls, herbicides, algaecides, or fertilizers which causes an interference, an upset, or a pass-through at the POTW; (15) Any drainage from a vehicle radiator; (16) Any recognizable portions of the human or animal anatomy; (17) Any wastes which cause excessive incrustations, scale, or precipitates on sewer walls; or having any detrimental characteristics that may cause damage to the City of Ontario's sewerage system or injury to service and maintenance personnel; (18) Any strongly odorous waste or waste tending to create odors; (19) Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard, or to prevent entry into the sewers for maintenance or repair;

(20) Any infectious waste except where prior written approval for such discharges is given by the Administrator. Such waste shall be rendered non-infectious prior to discharge if the infectious waste is deemed to pose a threat to the public health and safety, or will result in any violation of applicable waste discharge requirements; (21) Any waste containing substances that may precipitate, solidify, gel, polymerize, or become viscous at temperatures between forty degrees Fahrenheit (40°F)and one hundred degrees Fahrenheit (100°F); (22) Any waste generated outside the City of Ontario unless otherwise approved by the Administrator. (23) Any excessive amounts of deionized water, steam condensate, distilled water, or single pass cooling water; (24) Any trucked or hauled pollutants, except at discharge points designated by the Administrator; (25) Sludges, screenings, or other residues from the pretreatment of industrial wastes; (26) Any emulsifying agent which suspends or emulsified fat, grease or oil and is specifically used to prevent oil and grease buildup in any gravity separation device or interior plumbing; (27) Any wastewater that causes alone, or in conjunction with other sources, the local POTW's effluent to fail a toxicity test; (28) Any detergents, surface-active agents (surfactants), or other substances that causes excessive foaming in the sewer collection system or at the POTW; (29) Any wastewater containing excessive quantities of bromide causing, alone or in conjunction with other sources, the regional treatment plant's effluent to violate the NPDES permit for chloro-dibromomethane or dichloro- bromomethane; (30) Any wastewater containing excessive quantities of 2,3,7,8-TCDD (Dioxin); (31) Hydrolysate; (32) Unused, unwanted, or expired pharmaceuticals (both over the counter and prescription- only medications), except in accordance with federal and state regulations, or in the absence of such regulations, using best management practices; (33) Any septic waste originating from chemical toilets; (34) Any quantity of wastewater flow in excess of permitted limits or purchased capacity; (35) Any wastewater containing excessive quantities of 1,2,3 trichloropropane; and (36) Pollutants, substances, or wastewater prohibited by § 6-7.201 shall not be processed or stored in such a manner that they could be discharged to the sewerage system. (c) When specific limits must be developed by the City or POTW: (1) The Administrator developing a pretreatment program pursuant to 40 CFR 403.8 shall develop and enforce specific limits to implement the prohibitions listed in paragraphs (a) and (b) of this section. The Administrator shall continue to develop these limits as necessary and effectively enforce such limits. (2) Where pollutants contributed by user(s) result in interference or pass-through, and such violation is likely to recur, the Administrator shall develop and enforce specific effluent limits for industrial user(s), and all other users, as appropriate, which, together with appropriate changes in the POTW regional treatment plant's facilities or operation, are necessary to ensure renewed and continued compliance with the POTW's NPDES permit or sludge use or disposal practices. (3) Specific effluent limits shall not be developed and enforced without individual notice to persons or groups who have requested such notice and an opportunity to respond. (4) The Administrator, or IEUA may develop best management practices (BMPs) to implement paragraphs (c)(1) and (c)(2) of this section. Such BMPs shall be considered local limits and pretreatment standards for the purposes of this part and Section 307(d) of the Act. (d) Where specific prohibitions or limits on pollutants or pollutant parameters are developed by either the Administrator or IEUA in accordance with paragraph (b) above, such limits shall be deemed pretreatment standards

for the purposes of Section 307(d) of the Act. (e) The Administrator shall develop, apply, and enforce specific limits or best management practice requirements as necessary to implement the prohibitions listed in § 6-7.201 and to comply with sewage quality standards that are imposed on it by the local POTW. Where specific prohibitions or best management practices are developed by the Administrator, such limits shall be deemed and enforceable as pretreatment standards. (f) EPA enforcement actions under Section 309(f) of the Clean Water Act. (1) If, within thirty (30) days after notice of an interference or pass through violation has been sent by EPA to the POTW, and to persons or groups who have requested such notice, the POTW fails to commence appropriate enforcement action to correct the violation, EPA may take appropriate enforcement action under the authority provided in Section 309(f) of the Clean Water Act. (§ 3, Ord. 2755, eff. April 4, 2002, as amended by § 3, Ord. 2945, eff. January 6, 2012, and § 2, Ord. 3190, eff. October 7, 2021)