(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° F. (60° C.) using the test methods specified in 40 CFR 261.21;
(b) Wastewater having a pH less than 5.0 or more than 12, 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 1/2 inch in any dimension;
(d) Pollutants, including oxygen-demanding pollutants (BOD and the like), 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° F. (40° 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 Board;
(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's NPSES 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 Board;
(m) Sludges, screenings, or other residues from the pretreatment of industrial wastes;
(n) Medical wastes, except as specifically authorized by the Board in a wastewater discharge permit;
(o) Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test;
(p) Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW;
(q) 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.
(r) Wastewater containing more than 100 parts per million by weight of total fats, oil, grease or wax, whether emulsified or not, containing substances which may solidify or become viscous at a temperature between 32° and 160° Fahrenheit (0° and 71° Celsius).
(s) Any substance which will, or probably will, materially contribute to the probability of the sewage treatment plant violating its NPDES permit, or the water quality standards of the receiving stream, or the requirements of any other federal or state standard applicable to the operation of that plant.
(t) Any substance which causes or materially contributes to the formation of scum or foam in amounts which will or will probably interfere with the operation of the wastewater collection and/or treatment facilities of the city or cause material additional expense in the operation of same.
(u) Any trucked or hauled pollutants or wastewater except as specifically and authorized in advance by the Board.
(v) Chemical or biological agents or other methods or means which dissolve, liquefy, suspend, disperse, emulsify, entrain, or otherwise directly or indirectly enable fats, grease, wax, or other similar material to flow through the wastewater collection system.
(B) National Categorical Pretreatment Standards. The categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405-471 are hereby incorporated, as they now exist or hereafter may be modified.
(1) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Board 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 Board 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. State pretreatment standards located at 327 IAC 5 "Industrial Wastewater Pretreatment Programs (NPDES)" are hereby incorporated as they now exist or hereafter may be modified. Where such a state pretreatment standard as well as national pretreatment standard is applicable to an industrial user, the industrial user shall comply with the more stringent standards.
(D) Local limits.
(1) The following pollutant limits are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the more stringent of standards then in effect as established by federal or Indiana authority or the maximum daily limit as derived from daily composite sampling:
(a) 100 mg/l ammonia
(b) 0.07 mg/l arsenic
(c) 0.048 mg/l cadmium
(d) 5.00 mg/l chromium total
(e) 0.52 mg/l chromium +6
(f) 0.76 mg/l copper
(g) 0.15 mg/l cyanide
(h) 0.337 mg/l lead
(i) 0.02 mg/l mercury
(j) 8.5 mg/l molybdenum
(k) 0.88 mg/l nickel
(l) 0.394 mg/l selenium
(m) 0.50 mg/l silver
(n) 2.37 mg/l zinc
(o) 2,500 mg/l biological oxygen demand (BOD)
(p) 2,500 mg/l total suspended solids (TSS)
(q) 100 mg/l fats, oil, or grease, and
(r) for users who, in the discretion of the Board, are found to contribute more than 5 pounds of total phosphorus to the POTW per daily average, 50 mg/l phosphorus.
(2) 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 Board may impose mass limitations in addition to, or in place of, the concentration-based limitations above.
(3) Any wastewater containing in excess of 210 mg/l BOD or 230 mg/l TSS will be surcharged as high strength wastewater as provided in § 51.103. The issuance of surcharges for treating high strength wastewater shall not be construed as acceptance of high strength wastewater for treatment by the City of Huntington. The city reserves the right and authority to prohibit the discharge of high strength wastewater when such wastewaters cause or are reasonably expected to cause POTW upsets, overloading or damage to the sewer collection system.
(E) City’s right of revision. The city reserves the right to establish, by ordinance or in wastewater discharge permits, more stringent standards or requirements on discharges to the POTW.
(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 Board 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. 35-C-92, passed 11-10-92; Am. Ord. 37-C-92, passed 12-8-92; Am. Ord. 8-C-99, passed 8-10-99; Am. Ord. 13-C-00, passed 8-8-00; Am. Ord. 12-C-03, passed 9-9-03; Am. Ord. 22-C-08, passed 10-28-08; Am. Ord. 19-C-12, passed 10-30-12; Am. Ord. 23-C-17, passed 11-28-17; Am. Ord. 16-C-20, passe 12-8-20) Penalty, see § 51.999