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Township of Unity, PA
Westmoreland County
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Table of Contents
Table of Contents
A. 
No user shall contribute or cause to be contributed, directly or indirectly, any pollutant or wastewater which will cause pass-through or interfere with the operation or performance of the POTW. These general prohibitions apply to all such users of a POTW whether or not the user is subject to National Categorical Pretreatment Standards or Requirements. A user may not contribute the following substances to any POTW:
(1) 
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. These substances include but are not limited to wastestreams with a closed-cup flashpoint of less than 140° F. 60° C., using the test methods specified in 40 CFR 261.21. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the system (or at any point in the system), be more than 5% or any single reading over 10% of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides and any other substances which the control authority, the state or approved authority has notified the user is a fire hazard or a hazard to the collection or treatment system.
(2) 
Solid or viscous substances which may cause obstruction to 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 particle 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, spent hops, wastepaper, wood, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes.
(3) 
Any wastewater having a pH less than 5.0, unless the POTW is specifically designed to accommodate such wastewater, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment and/or personnel of the POTW.
(4) 
Any wastewater containing toxic pollutants or pollutants which result in the presence of toxic gases, vapors or fumes in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process or cause injury, worker health and safety problems, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW or 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 307(a) of the Act.
(5) 
Any noxious or malodorous liquids, gases or solids which either singly 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 maintenance and repair.
(6) 
Any substance which may cause the POTW's effluent or any other product of the POTW, such as residues, sludge or scum, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case shall a substance discharged to the POTW cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under Section 405 of the Act or any criteria, guidelines or regulations affecting sludge use or disposal developed pursuant to the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act or state criteria applicable to the sludge management method being used.
(7) 
Any substance which will cause the POTW to violate its NPDES and/or state disposal system permit or the receiving water quality standards.
(8) 
Any wastewater with objectionable color not removed in the treatment process, such as but not limited to dye wastes and vegetable tanning solutions.
(9) 
Any wastewater having a temperature which will inhibit biological activity in the POTW treatment plant resulting in pass-through or interference, but in no case wastewater with a temperature at the introduction into the POTW which exceeds 40° C. (104° F.) unless USEPA has approved alternate limits as requested by the POTW.
(10) 
Any pollutants, including oxygen-demanding pollutants (BOD, etc.), released at a flow rate and/or pollutant concentration which a user knows or has reason to know will cause pass-through or interference to the POTW. In no case shall a slug load have a flow rate or contain concentration or quantities of pollutants that exceed for any time period longer than 15 minutes more than five times the average twenty-four-hour concentration, quantities or flow during normal operation.
(11) 
Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable state or federal regulations.
(12) 
Any wastewater which causes a hazard to human life or creates a public nuisance.
(13) 
Petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin in amounts that will cause pass-through or interference of the POTW.
(14) 
Any trucked or hauled pollutants, except at discharge points designated by THTMA.
B. 
When THTMA determines that a user is contributing to the POTW any of the above-enumerated substances in such amounts as to cause pass-through or interference of the POTW, the control authority shall advise the user of the impact of the contribution on the POTW; develop effluent limitations for such user to correct the problem of pass-through or interference of the POTW. THTMA may pursue an enforcement action, as outlined in Article IX, Administrative Enforcement Remedies, of this Part 3 against the industrial user in the event that the user causes pass-through or interference.
Upon the promulgation of the Federal Categorical Pretreatment Standards for a particular industrial subcategory, the federal standard, if more stringent than limitations imposed under this Part 3 for sources in that subcategory, shall immediately supersede the limitations imposed under this Part 3. The categorical pretreatment standards found in 40 CFR Chapter 1, Subchapter N, Parts 405-471, are incorporated herein by reference. The control authority shall notify all affected users of the applicable reporting requirements under 40 CFR 403.12 and shall provide copies of any such written notices to UTMA.
A. 
Where the POTW treatment plant achieves consistent removal of pollutant(s) discharged by an industrial user to which a categorical pretreatment standard(s) applies, THTMA may, at its discretion and subject to the conditions of 40 CFR 403.7, make application to the approval authority for permission to grant removal credits to reflect removal by the POTW of pollutants specified in the categorical pretreatment standard(s). The control authority may grant a removal credit equal to or, at its discretion, less than its consistent removal rate. Upon being granted a removal credit, each affected industrial user shall calculate its revised discharge limits in accordance with 40 CFR 403.7(a)(4).
B. 
Consistent removal shall mean the average of the lowest 50% of the removal measured according to 40 CFR 403.7(b)(2). All sample data obtained for the measured pollutant during the time period prescribed in 40 CFR 403.7(b)(2) must be reported and used in computing consistent removal. If a substance is measurable in the influent but not in the effluent, the effluent level may be assumed to be the limit of measurement, and those data may be used by the POTW at its discretion and subject to approval by the approval authority. If the substance is not measurable in the influent, the data may not be used.
C. 
The POTW may grant removal credits only if:
(1) 
The POTW applies for and receives authorization from the approval authority to give a removal credit in accordance with the requirements and procedures specified in 40 CFR 403.7(e);
(2) 
The POTW demonstrates and continues to achieve consistent removal of all the pollutant(s) in accordance with 40 CFR 403.7(b);
(3) 
The POTW has an approved pretreatment program in accordance with and to the extent required by 40 CFR 403;
(4) 
The granting of removal credits will not cause the POTW to violate the local, state and federal sludge requirements which apply to the sludge management method chosen by the POTW; and
(5) 
The granting of removal credits will not cause a violation of the POTW's permit limitation or conditions.
D. 
THTMA may then modify pollutant discharge limits in the federal pretreatment standards if the requirements contained in 40 CFR 403.7 are fulfilled and prior approval from the approval authority is obtained.
[Amended 7-28-1998 by Ord. No. O-2-98]
No industrial user shall discharge wastewater containing a mass of any pollutant which, when taken together with the mass of that pollutant discharged by all other industrial users, will cause the mass of the pollutant to exceed the mass of that pollutant specified in the headworks industrial allowance which has been approved by the approval authority for the POTW treatment plant into which the industrial user discharges.
State requirements and limitations on discharges shall apply in any case where they are more stringent than federal requirements and limitations on those in this Part 3.
Unity Township reserves the right to establish by ordinance more stringent limitations or requirements on discharges to the wastewater disposal system if deemed necessary, in its discretion.
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 the limitations contained in the federal categorical pretreatment standards or in any other pollutant-specific limitation developed by Unity Township, THTMA or the state. Dilution is permitted only where expressly authorized by an applicable pretreatment standard or requirement.
A. 
Each significant industrial user shall provide protection from accidental or slug discharges of prohibited materials or other substances regulated by this Part 3. Facilities to prevent accidental or slug discharges of prohibited materials shall be provided and maintained at the owner or user's own cost and expense. Detailed plans showing facilities and a complete description of operating procedures implemented to provide this protection shall be submitted to THTMA prior to construction of the facility. All existing significant industrial users shall have completed the aforementioned plan as required by this Part 3. No industrial user who commences contribution to the POTW after the effective date of this Part 3 shall be permitted to introduce pollutants into the system until accidental discharge procedures have been approved by THTMA. Review and approval of such plans and operating procedures shall not relieve the industrial user from the responsibility to modify the industrial user's facility as necessary to meet the requirements of this Part 3.
B. 
A complete description of operating procedures must include but not be limited to the following:
(1) 
A listing of all stored chemicals, including the type and nature of the chemical, maximum quantity stored and any safety procedures to be followed if an accidental discharge occurs.
(2) 
A description of discharge practices, including nonroutine batch discharges.
(3) 
A description of procedures to prevent adverse impact from accidental or slug discharges, including but not limited to inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of site runoff, employee training, building of containment structures or equipment for emergency response.
A. 
In the case of accidental or slug discharge or any discharge that could cause problems at the POTW, it is the responsibility of the industrial user to immediately telephone and notify the POTW of the incident. The notification shall include location of discharge, type of waste discharged, concentration and volume of waste discharged and corrective actions.
B. 
Within five days following an accidental or slug discharge, the industrial user shall submit to THTMA a detailed written report describing the cause of the discharge and the measures taken by the industrial user to prevent similar future occurrences. Such notification shall not relieve the industrial user of any expense, loss or damage to the POTW, fish kills or any other damage to person or property; nor shall such notification relieve the industrial user of any fines, civil penalties or other liability which may be imposed by this Part 3 or other applicable law.
A notice shall be permanently posted on the industrial user's bulletin board or other prominent location advising employees whom to contact in the event of an accidental or slug discharge. Employers shall ensure that all employees are advised of the emergency notification procedure.
THTMA shall, at least once every two years, evaluate each industrial user served by THTMA to determine if that industrial user will be required to develop a plan to control accidental or slug discharges.