(A) A user may not introduce into a POTW any pollutant(s) which cause pass through or interference. These general prohibitions and the specific prohibitions in § 52.43 apply to each user introducing pollutants into a POTW whether or not the user is subject to other national pretreatment standards or any national, state, or local pretreatment requirements.
(B) (1) A user may not introduce into the POTW, any water or waste containing the following chemical constituents or similar objectionable or 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, cause Murray Sewer System to violate the terms of its KPDES permit, prevent the use of acceptable sludge disposal methods, or exceed a limit set forth in a categorical pretreatment standard. The following limits are established to protect against pass through and interference:
Pollutant Parameter
|
Daily Maximum Concentration (mg/l) |
Pollutant Parameter
|
Daily Maximum Concentration (mg/l) |
Arsenic | 1.07 |
Cadmium (T) | 0.093 |
Chromium (T) | 2.77 |
Hexavalent Chromium | 0.55 |
Copper (T) | 0.44 |
Cyanide (T) | 0.24 |
Iron | 10 |
Lead (T) | 0.11 |
Mercury | 0.016 |
Nickel (T) | 1.00 |
Selenium | 0.16 |
Silver (T) | 0.34 |
Zinc (T) | 2.61 |
(2) The above limits apply at the point where the wastewater is discharged into the POTW. All concentrations for metallic substances are for total metal unless indicated otherwise. Mass limitations may be imposed in addition to the concentration-based limitation. All industrial users must comply with these limitations where they are more stringent than applicable state and/or federal regulations. Based upon the sampling program at the Bee Creek Water Resource Recovery Facility, these values may be adjusted to reflect Murray Sewer System's needs; the city shall give public notice of any change proposed for these limits.
(C) The following discharges are restricted to those users with written approval by the appropriate city, state or federal approval authority:
(1) Any waters or wastes containing phenols or other taste or odor-producing substances, in such concentrations exceeding limits which may be established by the Murray Sewer System as necessary, after treatment of the composite sewage, to meet the requirements of the state, federal, or other public agencies of jurisdiction for such discharge to the receiving waters.
(2) Any radioactive wastes or isotopes licensed by the Federal Nuclear Regulatory Commission and of such half-life or concentration as may exceed limits established by state or federal regulations.
(3) Materials which exert or contain:
(a) Unusual concentrations of inert suspended solids, including, but not limited to, sodium chloride and sodium sulfate;
(b) Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions);
(c) Unusual BOD, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the POTW; and
(d) Unusual volume of flow or concentration of wastes constituting slugs.
(D) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable to treatment only to such degree that the water resource recovery facility effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(E) Medical wastes, except as specifically authorized by the Murray Sewer System in an individual wastewater discharge permit or in the general permit.
(F) Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions whether neutralized or not.
(Ord. 2024-1867, passed 7-11-24)