(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 140oF (60oC) using the test methods specified in 40 CFR 261.21;
B. Wastewater having a pH less than 5.0 or more than 10.5, 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 one-quarter inch (1/4") 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 150oF (65.5oC), 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 104oF (40oC).
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 POTWin 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 Section 927.03(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 waste and paint manufacturing waste, which consequently imparts color to the treatment plant's effluent, thereby violating the City's NPDES permit;
K. Wastewater containing any radioactive wastes or isotopes except in compliance with applicable State or Federal regulations;
L. Sludges, screenings, or other residues from the pretreatment of industrial wastes;
M. Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test;
N. 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 five percent (5%) or any single reading over ten percent (10%) of the Lower Explosive Limit of the meter.
O. Medical Wastes, except as specifically authorized by the Superintendent in an individual wastewater discharge permit or a general permit.
P. Detergents, surface-active agents, or other substances which might cause excessive foaming in the POTW.
Q. Fats, oils or greases of animal or vegetable origin in concentrations greater than 150 mg/l.
R. Frac Water [check and get proper terminology and all inclusive definition or requirements from WVDEP].
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. The categorical pretreatment standards found at 40 CFR I, Subchapter N, Parts 405-471 are hereby incorporated.
(1) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Superintendent may impose equivalent concentration or mass limits in accordance with 40 CFR 403.6(c).
(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 using the combined wastestream formula in 40 CFR 403.6(e).
(3) A user may obtain a variance from a categorical pretreatment standard if the user can prove, pursuant to the procedural and substantive provisions in 40 CFR 403.13, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.
(4) A user may obtain a net gross adjustment to a categorical standard in accordance with 40 CFR 403.15.
(c) State Pretreatment Standards. (Reserved) (Ord. 14173. Passed 7-5-11.)
(d) Local Limits. The following pollutant limits are established to protect against pass through interference. No person shall discharge wastewater containing in excess of the following daily maximum allowable discharge limits:
PARAMETER | AVERAGE MONTHLY CONCENTRATION LIMITS (mg/l) | EPA TEST METHOD NUMBER | MDL ug/l |
Arsenic T. | 0.647 | 200.8 | 1.4 |
Cadmium T. Recoverable | 0.078 | 200.8 | 0.5 |
Chloride | 1100 | 325.3 | N/A |
Chromium T. | 6.7 | 200.8 | 0.9 |
Copper T. Recoverable | 1.5 | 200.8 | 0.5 |
Cyanide Free | 0.21 | Weak acid dissociable | Standard Methods |
Lead T. Recoverable | 0.5 | 200.8 | 0.6 |
Mercury T. | 0.0003 | 1631 | 0.0002 |
Nickel T. Recoverable | 1.88 | 200.8 | 0.5 |
Selenium T. Recoverable | 0.45 | 200.9 | 0.6 |
Silver T. Recoverable | 0.18 | 200.8 | 0.1 |
Zinc T. Recoverable | 2.5 | 200.8 | 1.8 |
Total Toxic Organic | 2.13* | ||
* (The Sum of EPA Standard 624, 625, 608) | |||
BOD | Surcharge | Standard Methods | 0.001 |
TSS | Surcharge | 160.2 | 0.001 |
Ammonia | Surcharge | Standard Methods | 0.1 |
PH (max) | 10.5 | Standard Methods | Electrometric 0.1 SU |
PH (min) | 5.0 | Standard Methods | Electrometric 0.1 SU |
Chromium (+6) Hexavalent | 0.2 | 218.6 | 0.0006 |
Temperature | 150 degrees F. | Electrometric 0.1 SU | |
Flow (GPD) | Spec. to S.I.U. | ||
(Ord. 14814. Passed 5-17-16.)
The above limits apply at the point where the wastewater is discharged to POTW. All concentrations for metallic substances are for "total" metal unless indicated otherwise. The Superintendent may impose mass limitations in addition to, or in place of, the concentration based limitations above.
A minimum of four instantaneous separate measurements are required to be reported to determine pH and Temperature. For Cyanide, Oil and Grease, Chromium +6, the individual results of four grab samples will be averaged and reported to determine the daily value. For volatile organic compounds (VOC' s) four grab samples must be combined in the laboratory immediately before analysis, and a single analysis performed. Oil & Grease sample must be collected in amber glass sample containers. For all other pollutants, samples must be obtained using the sample type shown in Addendum No. 1, page 4 of the Permit.
(e) City's Right of Revision. The City reserves the right to establish, by ordinance or in individual wastewater discharge permits, more stringent standards or requirements on discharges to the POTW, including regulation of pollutants of an unusual nature which are characteristic of a particular user.
(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. 14173. Passed 7-5-11.)