(A) Prohibited Discharge Standards.
(1) 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 they are subject to categorical pretreatment standards or any other national, state, or local pretreatment standards or requirements.
(2) Specific Prohibitions. No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater:
(a) Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, wastestreams with a closed-cup flashpoint of less than 140 degrees F (60 degrees C) using the test methods specified in 40 C.F.R. 261.21.
(b) Wastewater having a pH less than 5.0 or more than 9.5, or otherwise causing corrosive structural damage to the POTW or equipment.
(c) Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference but in no case solids greater than 0.25 inch (0.635 cm) in any dimension.
(d) Pollutants, including oxygen-demanding pollutants (BOD, etc.), 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.
(e) Wastewater having a temperature greater than 150°F (65°C) or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104 degrees F (40 degrees C).
(f) Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through.
(g) 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.
(h) Trucked or hauled pollutants, except at discharge points designated by the Superintendent in accordance with § 30.501(D).
(i) 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 to life, or to prevent entry into the sewers for maintenance or repair.
(j) Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the treatment plant's effluent, thereby violating the City of Morgantown Utilities Commission NPDES permit.
(k) Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations.
(l) Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the Superintendent.
(m) Sludges, screenings, or other residues from the pretreatment of industrial wastes.
(n) Medical wastes, except as specifically authorized, by the Superintendent in an individual wastewater discharge.
(o) Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail toxicity test.
(p) Detergents, surface-active agents, or other substances which that might cause excessive foaming in the POTW.
(q) Fats, oils, or greases of animal or vegetable origin in concentrations greater than 100mg/l.
(r) Wastewater causing two readings on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, of more than ten percent (10%) or any single reading over twenty percent (20%) of the lower explosive limit of the meter.
(3) 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.
(B) National Categorical Pretreatment Standards. Users must comply with the categorical pretreatment standards found at 40 C.F.R. Chapter 1, Subchapter N, Parts 405-471.
(1) When wastewater subject to a categorical pretreatment standard, is mixed with wastewater not regulated by the same standard, the Superintendent shall impose an alternate limit in accordance with 40 C.F.R. 403.6(e).
(2) When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated, by the same standard, the Superintendent shall impose an alternate limit in accordance with 40 C.F.R. 403.6(e).
(C) State Pretreatment Standards. Users must comply with all State of Kentucky pretreatment standards codified 401 K.A.R. 5:057 KPDES.
(D) Local Limits.
(1) The Superintendent is authorized to establish local limits pursuant to 40 C.F.R. 403.5(c).
(2) The following pollutant limits are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following daily maximum limit.
2.40 | mg/1 arsenic |
0.02 | mg/1 cadmium |
2.77 | mg/1 chromium, Total |
1.23 | mg/1 chromium, Hexavalent |
1.86 | mg/1 copper |
0.15 | mg/1 cyanide |
0.27 | mg/1 lead |
0.003 | mg/1 mercury |
2.79 | mg/1 nickel |
0.24 | mg/1 selenium |
0.63 | mg/1 silver |
8.00 | mg/1 zinc |
1400 | mg/1 BOD* |
1400 | mg/l TSS* |
100 | mg/1 Total Oil & Grease* |
* Higher limits may be allowed upon written authorization from the superintendent. Concentrations above 250 mg/1 for BOD and/or TSS may be surcharged. Total oil and grease concentrations above 25 mg/1 may be surcharged.
(3) The above limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances are for total metal unless indicated otherwise. The Superintendent may impose mass limitations in addition to the concentration-based limitations above.
(4) The Superintendent may develop Best Management Practices (BMPs), by ordinance or in individual wastewater discharge permits to implement local limits and. the requirements of § 30.500(A).
(E) City of Morgantown Utilities Commission Right of Revision. The City of Morgantown Utilities Commission reserves the right to establish, by ordinance or in individual wastewater discharge permits more stringent standards or requirements on discharges to the POTW consistent with the purpose of this article.
(F) Dilution. No user shall ever increase the use of process water, or in any way attempt to dilute a discharge, as a partial or complete substitute for adequate treatment to achieve compliance with a discharge limitation unless expressly authorized by an applicable pretreatment standard or requirement. The Superintendent may impose mass limitations on users who are using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition, of mass limitations is appropriate.
(Ord. 2014-01, passed 2-13-14)