Township of Cranberry, PA
Butler County
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[Ord. 2006-373, 9/7/2006]
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, commonwealth, or local pretreatment standards or requirements.
Specific Prohibitions. No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater:
Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, waste streams with a closed cup flashpoint of less than 140° F. (60° C.) using the test methods specified in 40 CFR 261.21;
Wastewater having a pH less than 5.0 or more than 9.0, or otherwise creating a significant risk of causing corrosive structural damage to the POTW or equipment;
Solid or viscous substances in amounts which will cause obstruction of flow in the POTW causing interference, but in no case solids greater than 1/2 inch in any dimension;
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;
Wastewater having a temperature greater than 120° F. at the point of discharge into the POTW, 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° F.;
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass-through;
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;
Trucked or hauled pollutants, except at discharge points designated by the Township in accordance with § 19-304;
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;
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 Township's NPDES permit;
Wastewater containing any radioactive wastes or isotopes, except in compliance with commonwealth or federal regulations;
Stormwater, surface water, groundwater, artesian well water, roof runoff, or subsurface drainage;
Sludges, screenings, or other residues from the pretreatment of industrial wastes;
Medical wastes, except as specifically authorized by the Township in a wastewater discharge permit;
Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test;
Detergents, surface active agents, or other substances which may cause excessive foaming in the POTW;
Fats, oils or greases of animal or vegetable origin in concentrations or amounts which will cause obstruction interference in the POTW;
Wastewater causing two successive readings on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, of more than 5% for any single reading over 10% of the lower explosive limit of the meter.
[Ord. 2006-373, 9/7/2006]
The Township does not regulate, monitor, or enforce any categorical pretreatment standards under this chapter. Categorical users tributary to the POTW remain responsible to the EPA for compliance with categorical standards. The Township may impose local pretreatment limits on a categorical user through the issuance of a wastewater discharge permit, which may contain different pollutants and concentrations and amounts from the categorical limits which apply to the user.
[Ord. 2006-373, 9/7/2006]
For pollutants of concern, the Township shall determine maximum allowable headworks loadings (MAHLs) to protect against pass-through and interference. These loadings shall be calculated using data accumulated through a headworks analysis at the POTW and software developed by the EPA to establish local limits specific to the POTW. The MAHLs shall be established by resolution and may be modified as necessary.
To ensure that aggregate amounts of pollutants discharged into the system do not exceed the MAHLs to the POTW, the Township shall impose mass or concentration limits for pollutants of concern that may be discharged into the POTW by significant industrial users with the issuance of wastewater discharge permits. Such mass or concentration limits may be modified by the Township.
[Ord. 2006-373, 9/7/2006]
No user shall 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 Township 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.