1. Explosives. 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 POTW 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 five percent nor any single reading over ten percent (ten percent of the lower explosive limit (LULL)) of the meter.

2. Solids. Except as authorized in Schedule 1 of the Orem City Wastewater Control Ordinance Controlled Limited Pollutants, solid or viscous substances which may cause obstruction of the flow in a sewer or other interference with the operation of the wastewater treatment facilities such as, but not limited: grease, garbage with particles greater than one-quarter inch in any dimension, animal guts or tissues, paunch manure, bones, hair, hides, or flashings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, wastepaper, wood, plastics, gas, tar or asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes.

3. Corrosives. Any wastewater having a PH less than 6.5 or more than 8.5, or wastewater having any other corrosive equipment, and/or personnel of the POTW.

4. Toxic. Any wastewater containing toxic pollutants, except as authorized in said Schedule 1, Controlled Limited Pollutants, which either singly or by interaction with other pollutants, cause injury or interference with any wastewater treatment process or constitutes a hazard to humans or animals, creates a toxic effect in the receiving waters of the POTW, contaminates the sludge of any POTW systems, or exceeds the limitation set forth in a Categorical Pretreatment Standard. A toxic pollutant shall include but not he limited to any pollutant identified pursuant to Section 307(1) of the Federal Water Pollution Control Act, also known as the Clean Water Act, as amended, 33 USC 1251 et seq., herein referred to as “the Act.”

5. Noxious. Any malodorous liquids, gases, or solids which either singly or cumulatively 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 their maintenance and repair.

6. Untreatable. Any substance which may cause the POTW’s effluent or any other Product of the POTW, such as residues, sludge, or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process where the POTW is pursuing a reuse and reclamation program. 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 Section 405 of the Act or 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. NPDES permit violation. Any substance which will cause the POTW to violate its NPDES and/or State Disposal System Permit or the receiving water quality standards.

8. Objectionable Color. Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions,

9. Temperature. Any wastewater having a temperature which will inhibit biological activity in the POTW treatment plant resulting in interference or cause the temperature at the headworks of the POTW treatment plant to exceed one hundred four (104) degrees Fahrenheit.

10. Slug Loads. Any pollutants, including oxygen demanding pollutants (BOD, etc.) released at a flow 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 concentrations or qualities of pollutants that exceed for any time period longer than fifteen minutes more than five times the average twenty-four hour concentration, quantities, or flow during normal operation

11. Radioactive. Any wastewater containing any radioactive wastes or isotope of such half-life or concentration as may exceed limits established by the POTW manager in compliance with applicable state or federal regulations.

12. Hazard. Any wastewater which causes a hazard to human life or creates a public nuisance. (Ord. 121 §26(b), amended, 1985)