(A) Wastewater containing more than twenty five (25) milligrams per liter of petroleum oil, non-biodegradable cutting oils, or products of mineral oil origin.
(B) Wastewater containing floatable oils, fat, or grease, whether emulsified or not, in excess of one hundred (100) milligrams per liter or containing substances which may solidify or become viscous at temperatures 32-150 degrees (0-65 degrees C).
(C) Any garbage that has not been properly shredded. Garbage grinders may be connected to sanitary sewers from homes, motels, institutions, restaurants, hospitals, catering establishments, or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers.
(D) Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants which: injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, causes the city to violate the terms of its KPDES permit, prevents the use of acceptable sludge disposal methods, or exceed a limitation set forth in a categorical pretreatment standard.
(E) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the city in compliance with applicable state or federal regulations.
(F) Any water or wastes which by interaction with other water or wastes in the public sewer system release obnoxious gases, from suspended solids which interfere with the collection system, or create a condition deleterious to structures and treatment processes.
(G) Any wastewater with objectionable color which cannot be removed to an acceptable level within the operation of the wastewater treatment process unless otherwise specifically noted in the industrial user permit (IUP).
(H) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed to the extent required by the city's NPDES/KPDES permit.
(I) Any waste(s) or wastewater(s) classified as a hazardous waste by the Resource Conservation and Recovery Act (RCRA) without a sixty (60) day prior notification of such discharge to the superintendent. This notification must include the name of the hazardous waste, the EPA hazardous waste number, type of discharge, volume/mass of discharge and time of occurrence(s). The superintendent may prohibit or condition the discharge(s) at any time.
(J) (1) Any water or wastes which have characteristics based on a twenty-four (24) hour composite sample, grab or a shorter period composite sample, if more representative, that exceed the following normal maximum domestic wastewater parameter concentrations:
Parameter
|
Maximum Allowable Concentration Without Surcharges
|
BOD | 250 mg/l |
TSS | 250 mg/l |
NH3
-N
|
25 mg/l |
Oil and Grease (total) |
100 mg/l
|
(2) Any person discharging wastewater exceeding the maximum allowable concentration as noted above, will be subject to a surcharge fee for each pound loading over and above the set limit. Any other amenable constituents requiring the addition of specific chemicals for proper treatment will also be subject to surcharge as noted on the industrial user permit. Exceedance of the effluent limits specified above shall not be deemed to constitute a violation of a permit condition or this chapter if the appropriated surcharge fee is paid and the discharge does not cause interference or pass through of the POTW.
(K) The Utility Director and/or his or her designee is authorized to establish local limits pursuant to 40 CFR 403.5(c). In addition, the Utility Director may require the development of best management practices (BMPs), by ordinance or in individual wastewater discharge permits, to implement local limits and the requirements of this chapter. Such BMPs shall be considered local limits and pretreatment standards. The following limitations are established for characteristics of any wastewaters to be discharged into the municipal sewer system subject to any compliance schedule as established in the industrial user permit. All significant industrial users must comply with these limitations where they are more stringent than applicable state and/or federal regulations.
Parameter
|
Maximum Daily Concentration (mg/l) |
Parameter
|
Maximum Daily Concentration (mg/l) |
Arsenic |
0.53
|
Cadmium |
0.07
|
Chromium, total
|
1.71
|
Chromium, hexavalent
|
0.36
|
Copper |
0.50
|
Cyanide, free
|
0.23
|
Lead |
0.29
|
Mercury |
0.0028
|
Molybdemum
|
0.74
|
Nickel |
0.50
|
Selenium
|
0.22
|
Silver |
0.39
|
Zinc |
1.48 |
(L) The city has received authority through the U.S. EPA and state statutes to enforce the requirements of 40 CFR Chapter 1, Subchapter N, Parts 405-471, 40 CFR 403, and 40 CFR Part 35. All users shall comply with the requirements of those regulations.
(M) Users shall promptly notify the city in advance of any introduction of wastewater constituents or any substantial change in the volume or character of the wastewater constituents being introduced into the POTW. The Operations Manager may deny or condition the new introduction or change in discharge based on the information submitted in the notification or additional information as may be requested. Significant industrial users are required to notify the Operations Manager immediately of any changes at its facility affecting the potential for a slug discharge.
(Ord. No. 17-91, 6-25-91; Am. Ord. No. 12-99, 6-15-99; Am. Ord. No. 13-2009, 8-4-09; Am. Ord. No. 01-13, § 3, 2-5-13; Am. Ord. No. 17-18, § 1, 11-20-18)