(A) A user may not introduce into the POTW any pollutant(s) which cause pass through or interference. These general prohibitions and the following specific prohibitions apply to each user introducing pollutants into the POTW whether or not the user is subject to other National Pretreatment Standards or any national, state or local pretreatment requirements.
(B) In addition, the following pollutants shall not be introduced into the POTW:
(1) Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to, waste streams with a closed cup flashpoint of less than 140°F or 60°C using the test methods specified in 40 C.F.R. § 261.21. Prohibited pollutants include, but are not limited to: gasoline; kerosene; naphtha; benzene; toluene; xylene; ethers; alcohols; ketones; aldehydes; peroxides; chlorates; perchlorates; bromates; carbides; hydrides; and sulfides. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the city sewerage system (or at any point in the city sewerage system) be more than 5% nor any single reading over 10% of the lower explosive limit of the meter;
(2) Pollutants which will cause corrosive structural damage to the POTW, but in no case discharges with pH lower than 5.0 or greater than 9.5;
(3) Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in interference. This includes, but is not limited to, grease, garbage with particles greater than one-half inch 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 or 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;
(4) 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;
(5) Heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW treatment plant exceeds 40°C (104°F);
(6) Petroleum oil, non-biodegradable cutting oil or products of mineral oil origin in amounts that will cause interference or pass through;
(7) Pollutants which result in the presence of toxic gases, vapors or fumes within the POTW in a quantity that may cause acute worker health and safety problems;
(8) Any trucked or hauled pollutants, except at discharge points designated by the POTW;
(9) Any noxious or malodorous liquid, gas or solid which, either alone or in combination with other pollutants, is sufficient to create a public nuisance or hazard to life or is sufficient to prevent entry into the city sewerage system for maintenance or repair;
(10) Any substance which may cause the city sewerage system’s effluent or any other product of the city sewerage system, such as residues, sludges or scums, to be unsuitable for reclamation and reuse or which may interfere with the reclamation process;
(11) Any substance which will cause the city to violate its NPDES permit;
(12) Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions;
(13) Any pollutants at a flow rate and/or pollutant discharge rate which are excessive over relatively short time periods so that there is a treatment process upset and subsequent loss of treatment efficiency. In no case shall a slug load have a flow rate or discharge quantities of pollutants, that exceed for any time period longer than 15 minutes, more than five times the average flow rates or discharge quantities during normal operation. Exception to this provision will be made when flow rate and/or pollutant discharge rate is unintentionally and temporarily out of compliance due to factors beyond the reasonable control of the nonresidential user, such as power outages, severe weather conditions and other acts of God;
(14) Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the City Manager or applicable state or federal standards;
(15) Any wastewater containing oil and grease in excess of 20 milligrams per liter of solution as determined by hexane extraction or silica gel treated hexane extraction per 40 C.F.R. § 136.3. This provision will be considered in the context of alternative testing methods which demonstrate that the discharged substance(s) would not negatively impact sewerage treatment processes or receiving streams; and
(16) Any unpolluted water, including, but not limited to, non-contact cooling water, stormwater, groundwater, roof runoff or subsurface drainage.
(Ord. 1287, passed 3-1-2021) Penalty, see § 52.99