13.13.202 Prohibited Discharge.
1. Storm sewer. No person shall discharge or cause to be discharged any waters such as storm water, surface water, groundwater, roof runoff, subsurface drainage, or cooling water to any sanitary sewer, except storm water runoff from limited areas, which stormwater may be polluted at times and may be discharged to the sanitary sewer by permission of the Director and Board of Health. Stormwater other than that exempted above and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers, storm sewers or storm sumps or to a natural outlet approved by the Director and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged, on approval of the Director, to a storm sewer, combined sewer, or natural outlet.
2. General Prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW, whether or not the users are subject to categorical pretreatment standards or any other Federal, State, or local pretreatment standards or requirements.
3. Prohibited discharges – specific categories. 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 POTW. These general prohibitions apply to all users of the POTW, whether or not the user is subject to National Categorical Pretreatment Standards or requirements. A user may not contribute the following substances to the POTW:
a. 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. Also, any pollutants which create a fire or explosion hazard in the POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than 140 degrees Fahrenheit or 6 degrees Centigrade using the test methods specified in 40 CFR 261.21. 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 (5%) nor any single reading over ten percent (10%) of the Lower Explosive Limit [LEL]) of the meter.
b. Solids. Except as authorized in Schedule 1, 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 to: grease, garbage with particles greater than one-quarter inch (1/4”) in any dimension, animal guts or tissues, paunch manure, bones, hair, hides, or fleshings, 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, petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through.
c. Corrosive. Any wastewater having a pH less than 5.0 or more than 9.0, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment, and/or personnel of the POTW.
d. Toxic. Any wastewater containing toxic pollutants, which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may impair worker health or cause safety problems. Controlled limited pollutants, which either singly or by interaction with other pollutants, cause injury or interference with any wastewater treatment process, or hazard to humans or animals, or a toxic effect in the receiving waters of the POTW, or contaminate the biosolids of any POTW systems. Not 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 Section 40 CFR 403, APP.B.
e. 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.
f. Untreatable. Any substance which may cause the POTWs effluent or any other product of the POTW, such as residues, biosolids, 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 discharged into the POTW cause the POTW to be in non-compliance with biosolid use or disposal criteria, guidelines, or regulations developed under Section 405 of the Act or any criteria, guidelines, or regulations affecting biosolid use or disposal developed pursuant to the Solid Waste Disposal Act, the Clear Air Act, the Toxic Substances Control Act, or State criteria applicable to the biosolid management method being used.
g. NPDES permit violation. Any substances which will cause the POTW to violate its NPDES or State Disposal System Permit or the receiving water quality standards.
h. 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.
i. Temperature. Any wastewater having a temperature which will inhibit biological activity in the POTW treatment plant resulting in interference, or which will cause temperature at the headworks of the POTW treatment plant to exceed 40 degrees Centigrade or 104 degrees Fahrenheit.
j. Slug loads. Any discharge of a non-routine, episodic nature, including but not limited to an accidental spill or non-customary batch discharge (see 40 CFR 403.8(f)(2)(v)).
k. Radioactive. Any wastewater containing any radioactive wastes or isotope or such half-life or concentration as may exceed limits established by the POTW Manager in compliance with applicable State or Federal regulations.
l. Hazard. Any wastewater which causes a hazard to human life or creates a public nuisance.
m. Holding tank sewage. Holding tank sewage, or trucked or hauled pollutants, except at discharge points designated by the POTW Manager. Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW.
4. Commercial garbage grinders. Mechanically operated grinders or disposers for producing ground garbage are permitted in commercial establishments. Every such grinder or disposer shall be so designed and installed:
a. That it shall use a wet process pulping system, including a pulper and a dewater press, or other devices, which discharge at least 75% of the volume of pulp or solid wastes run through it into a garbage can or other container for transport to a proper and lawful garbage or waste disposal site approved by the Utah State Department of Health.
b. That it shall utilize a closed 1oop or other design which provides for a minimum of 85% use of recirculated water.
c. That the fluid discharged therefrom into the sewer shall flow readily through an approved trap or interceptor, drain line or soil line in a manner which prevents clogging or stoppage of the drain line.
d. That the entire installation shall comply with the applicable provisions of state and local plumbing and electrical codes.
e. That the grinders will be operated with only cold water flowing into the grinder while connected to the POTW sewer. The final decision regarding the sufficiency of the grinder installation for the foregoing requirements rests solely with the POTW manager.