(A) Wastewater containing more than fifty (50) milligrams per liter of petroleum oil, non-biodegradable cutting oils, or products of mineral oil origin.
(B) Wastewater from industrial plants, commercial business or other non-domestic connections containing floatable oils, fat, or grease, whether emulsified or not, in excess of fifty (50) milligrams per liter or containing substances which may solidify or become viscous at temperatures between thirty-two (32°) and one hundred fifty (150°) degrees Fahrenheit (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 interactions with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW, or to exceed the limitations set forth in a Federal Pretreatment Standard. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to Section 307(a) of the Act.
(E) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the superintendent in compliance with applicable state and federal regulations.
(F) Any water or wastes which, by interaction with other water or wastes in the public sewer system, release obnoxious gases, form suspended solids which interfere with the collection system, or create a condition deleterious to structures and treatment processes.
(G) Any wastewater with objectionable color not removable in the POTW, but in no case, wastewater with a color at the introduction into the POTW that exceeds three hundred (300) ADMI units.
(H) Water or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment process employed, or amenable to treatment only to the degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving stream of the POTW.
(I) Any water or waste which has characteristics based on a twenty-four (24) hour composite sample, grab, or a shorter period composite sample if more representative, which exceed the following normal maximum domestic wastewater parameter concentrations:
Parameter | Daily Maximum Allowable Concentration Without Surcharge |
BOD | 350 mg/l |
TSS | 350 mg/l |
NH-N | 25 mg/l |
Discharges greater than these concentrations may be subject to penalties contained in the enforcement response plan for the city, in addition to a surcharge.
(J) The city has received authority through U.S. EPA and state statutes to enforce the requirements of 40 CFR Chapter I, Subchapter N, Parts 405-471 and 40 CFR 403. All users shall comply with the requirements of those regulations as well as with all articles of this chapter. The POTW Superintendent and/or his or her designee may develop best management practices (BMPs), by ordinance or in individual wastewater discharge permits to implement local limits and the requirements of this chapter.
(K) Any waste or wastewater classified as a hazardous waste by the Resource Conservation and Recovery Act (RCRA) without, at least, a sixty (60) day period notification of the discharge to the superintendent of the POTW. This notification must include the name of the waste, EPA hazardous waste number, type of discharge, volume/mass of discharge and time of occurrence. The superintendent may deny or condition this discharge at any time.
(L) (1) The Superintendent of the POTW is authorized to establish local limits pursuant to 40 CFR 403.5(c). The following limitations are established for characteristics of any wastewaters to be discharged into the municipal sewer system:
Pollutant
| Daily Maximum Concentration (in milligrams per litter) |
Pollutant
| Daily Maximum Concentration (in milligrams per litter) |
Oil & Grease, total
| 100.0 mg/l
|
Oil & Grease, hydrocarbon
| 50.0 mg/l
|
Ph
| 6.0 – 10.0
|
Arsenic, total
| 0.41 mg/l
|
Cadmium, total
| 0.02 mg/l
|
Chromium, total
| 1.71 mg/l
|
Copper
| 1.25 mg/l
|
Lead, total
| 0.27 mg/l
|
Mercury
| 0.0005 mg/l
|
Nickel
| 0.98 mg/l
|
Zinc
| 1.94 mg/l
|
Silver
| 0.42 mg/l
|
Chromium, Hex.
| 0.47 mg/l
|
Cyanide
| 0.26 mg/l
|
Selenium, total
| 0.31 mg/l
|
(2) The city does reserve the right to modify these local limits in the future should such a modification prove necessary as a result of changes in SIU status, state or federal regulations, WWTP performance or other conditions. The City will enforce all limits in order to insure that the purpose of the Pretreatment Program is fully met.
(Ord., passed 8-20-91; Am. Ord., passed 6-1-93; Am. Ord. 95-18, passed 11-21-95; Am. Ord. 2000-40, passed 1-3-01; Am. Ord. 2008-28, passed 11-4-08; Am. Ord. 2011-35, passed 1-3-12; Am. Ord. 2014-25, passed 6-3-14; Am. Ord. 2021-12, passed 8-3-21)