(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 CFR 261.21;
B. Wastewater having a pH less than 6.0 or more than 10, 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 one half inch(es) (1/2”) 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 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;
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 PUB’s 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 PUB;
M. Sludges, screenings, or other residues from the pretreatment of industrial wastes;
N. Medical Wastes, except as specifically authorized by the PUB in an individual wastewater discharge permit;
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 accordance with the City of Parkersburg’s FOG ordinance;
R. Any water or waste with a BOD on excess of 300 mg/L and/or any water or waste containing Suspended Solids in excess of 300 mg/L, on an average daily flow composite basis, unless the Control Authority determines the volume of such wastewater discharge to be sufficiently small as to result in mass loadings within the treatment capacity of the POTW. On a case by case basis, the Control Authority may determine that limitations less than 300 mg/L BOD and Suspended Solids, or appropriate limits for other pollutants, may be required to prevent excessive loadings to the POTW.
S. Any substance which will cause the POTW to violate water quality Standards or designated uses of the receiving water as adopted by the State of West Virginia.
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 CFR Chapter I, Subchapter N, Parts 405–471.
(1) Where a categorical Pretreatment Standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the PUB may impose equivalent concentration or mass limits in accordance with subsections (b)(5) and (6).
(2) When the limits in a categorical Pretreatment Standard are expressed only in terms of mass of pollutant per unit of production, the PUB may convert the limits to equivalent limitations expressed either as mass of pollutant discharged per day or effluent concentration for purposes of calculating effluent limitations applicable to individual Industrial Users.
(3) When wastewater subject to a categorical Pretreatment Standard is mixed with wastewater not regulated by the same Standard, the PUB shall impose an alternate limit.
(4) Once included in its permit, the Industrial User must comply with the equivalent limitations developed in this subsection (b) in lieu of the promulgated categorical Standards from which the equivalent limitations were derived.
(5) Many categorical Pretreatment Standards specify one limit for calculating maximum daily discharge limitations and a second limit for calculating maximum Monthly Average, or 4-day average, limitations. Where such Standards are being applied, the same production or flow figure shall be used in calculating both the average and the maximum equivalent limitation.
(6) Any Industrial User operating under a permit incorporating equivalent mass or concentration limits calculated from a production-based Standard shall notify the PUB within two (2) business days after the User has a reasonable basis to know that the production level will significantly change within the next calendar month. Any User not notifying the PUB of such anticipated change will be required to meet the mass or concentration limits in its permit that were based on the original estimate of the long term average production rate.
(c) State Pretreatment Standards. Users must comply with State Pretreatment Standards codified at Title 47 Series 10 of the State of West Virginia Legislative Rules.
(Ord. 1396. Passed 6-14-11; Ord. 0-1502. Passed 1-13-15.)
(d) Local Limits.
(1) The Parkersburg Utility Board is authorized to establish Local Discharge Limits for users of the POTW.
(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 Monthly Average Limit.
Local Discharge Limits (mg/L) | |
Parameter | Monthly Average |
Cadmium (Cd) | 0.038 |
Chromium, Total | 2.349 |
Copper (Cu) | 1.437 |
Lead (Pb) | 0.509 |
Nickel (Ni) | 0.94 |
Silver (Ag) | 1.725 |
Zinc (Zn) | 2.605 |
Cyanide, Total | 0.692 |
Arsenic (As) | 0.081 |
Mercury (Hg) | 0.01 |
Molybdenum (Mo) | 0.046 |
Benzene | 0.002 |
Toluene | 0.083 |
Ethylbenzene | 0.076 |
Zylene | 0.349 |
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
PUB may impose mass limitations in addition to the concentration-based limitations above.
(3) The Parkersburg Utility Board may develop Best Management Practices (BMP), by ordinance or in individual wastewater discharge permits or general permits, to implement Local Limits and the requirements of Section 925.02(a).
(Ord. 0-1650. Passed 7-28-20.)
(e) Parkersburg Utility Board’s Right of Revision. The Parkersburg Utility Board reserves the right to establish, by ordinance or in individual wastewater discharge permits or in general 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 PUB 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. 1396. Passed 6-14-11; Ord. 0-1502. Passed 1-13-15.)