The requirements in Sector K apply to stormwater discharges associated with industrial activity from hazardous waste treatment, storage, or disposal facilities (TSDFs) as identified by the industrial activity code specified in Table 5 of Appendix D.
Permittees under Sector K are primarily engaged in treating, storing, or disposing of hazardous wastes, including those that are operating under interim status or a permit under Subtitle C of RCRA.
The following discharges are not authorized by this permit:
a. Hazardous waste landfill wastewaters, sanitary wastewater, contaminated groundwater, wastewater from recovery pumping wells, leachate, gas collection condensate, drained free liquids, contaminated ground water, laboratory-derived wastewater, and contact washwater from washing truck and railcar exteriors and surface areas that have come in direct contact with solid waste at the landfill facility.
b. Contaminated stormwater from hazardous waste landfills is regulated pursuant to 40 CFR pt. 445, subp. A. These numeric limitations (effluent limitation guidelines) apply to contaminated stormwater discharges from hazardous waste landfills subject to the provisions of RCRA Subtitle C at 40 CFR pts. 264 (Subp. N) and 265 (Subp. N).
a. Contaminated stormwater -as defined in 40 CFR pt. 445 (Landfills Point Source Category) is stormwater that comes in direct contact with landfill wastes, the waste handling and treatment areas, or landfill wastewater as defined in K.4.e of this Part. Some specific areas of a landfill that may produce contaminated stormwater include, but are not limited to, the open face of an active landfill with exposed waste (no cover added); the areas around wastewater treatment operations; trucks, equipment, or machinery that has been in direct contact with the waste; and waste dumping areas.
b. Drained free liquids -aqueous wastes drained from waste containers (e.g. drums) prior to landfilling.
c. Land treatment facility - a facility or part of a facility at which hazardous waste is applied onto or incorporated into the soil surface; such facilities are considered disposal facilities if the waste will remain after closure.
d. Landfill -an area of land or an excavation in which wastes are placed for permanent disposal, but that is not a land application or land treatment unit, surface impoundment, underground injection well, waste pile, salt dome formation, salt bed formation, underground mine, or cave as these terms are defined in 40 CFR 257.2, 258.2, and 260.10.
e. Landfill wastewater -as defined in 40 CFR pt. 445 (Landfills Point Source Category) all wastewater associated with, or produced by, landfilling activities except for sanitary wastewater, non-contaminated stormwater, contaminated groundwater, and wastewater from recovery pumping wells. Landfill wastewater includes, but is not limited to, leachate, gas collection condensate, drained free liquids, laboratory derived wastewater, contaminated stormwater, and contact washwater from washing truck, equipment, and railcar exteriors and surface areas that have come in direct contact with solid waste at the landfill facility.
f. Leachate -liquid that has passed through or emerged from solid waste and contains soluble, suspended, or miscible materials removed from such waste as defined in 40 CFR 257.
g. Non-contaminated stormwater -as defined in 40 CFR pt. 445 (Landfills Point Source Category) is stormwater that does not come into contact with landfill wastes, the waste handling and treatment areas, or landfill wastewater as defined in K.4.e of this Part. Non-contaminated stormwater includes stormwater that flows off the cap, cover, intermediate cover, daily cover, and/or final cover of the landfill.
h. Pile -any non-containerized accumulation of solid, nonflowing hazardous waste that is used for treatment or storage and that is not a containment building as defined in 40 CFR 260.10 .
i. Surface impoundment -a facility or part of a facility that is a natural topographic depression, human-made excavation, or diked area formed primarily of earthen materials (although it may be lined with man-made materials), that is designed to hold an accumulation of liquid wastes or wastes containing free liquids, and that is not an injection well. Examples of surface impoundments are holding storage, settling, and aeration pits, ponds, and lagoons as defined in 40 CFR pt. 257.
Sector-Specific Benchmark Values and Effluent Limitations: Sector - K. Discharges may be subject to requirements for more than one sector or subsector.
Link to this table
|Subsector||Parameter||Benchmark Values||Effluent Limits|
|K1 Industrial Activity Code HZ. Benchmark Parameters Only Applicable To Discharges Not Subject To Effluent Limitations In 40 CFR Part 445 Subpart A||Solids, Total Suspended (TSS)||100 mg/L 2||Effluent Monitoring Not Required|
|Nitrogen, Ammonia, Total (as N)||2.8 mg/L||Effluent Monitoring Not Required|
|COD (Chemical Oxygen Demand)||120 mg/L||Effluent Monitoring Not Required|
|BOD, Carbonaceous 05 Day (20 Deg C)||25 mg/L||Effluent Monitoring Not Required|
|Lead, Total (as Pb)||0.164 mg/L 1||Effluent Monitoring Not Required|
|Arsenic, Total (as As)||0.680 mg/L||Effluent Monitoring Not Required|
|Cadmium, Total (as Cd)||0.0078 mg/L 1||Effluent Monitoring Not Required|
|Zinc, Total (as Zn)||0.234 mg/L 1||Effluent Monitoring Not Required|
|Chromium, Total (as Cr)||3.5 mg/L 1||Effluent Monitoring Not Required|
|pH||6.0-9.0 SU 4||Effluent Monitoring Not Required|
|Cyanide, Total (as CN)||0.045 mg/L||Effluent Monitoring Not Required|
|Selenium, Total (as Se)||0.040 mg/L||Effluent Monitoring Not Required|
|Silver, Total (as Ag)||0.0041 mg/L 1||Effluent Monitoring Not Required|
|K23 Discharges From Hazardous Waste Landfills Subject To Effluent Limitations In 40 CFR Part 445 Subpart A||Solids, Total Suspended (TSS)||Benchmark Monitoring Not Required||88 mg/L daily maximum|
|27 mg/L calendar month average|
|Nitrogen, Ammonia, Total (as N)||Benchmark Monitoring Not Required||10 mg/L daily maximum|
|4.9 mg/L calendar month average|
|BOD, Carbonaceous 05 Day (20 Deg C)||Benchmark Monitoring Not Required||220 mg/L daily maximum|
|56 mg/L calendar month average|
|Arsenic, Total (as As)||Benchmark Monitoring Not Required||1.1 mg/L daily maximum|
|0.54 mg/L calendar month average|
|Phenol||Benchmark Monitoring Not Required||0.048 mg/L daily maximum|
|0.029 mg/L calendar month average|
|Zinc, Total (as Zn)||Benchmark Monitoring Not Required||0.535 mg/L daily maximum|
|0.296 mg/L calendar month average|
|Chromium, Total (as Cr)||Benchmark Monitoring Not Required||1.1 mg/L daily maximum|
|0.46 mg/L calendar month average|
|pH||Benchmark Monitoring Not Required||6.0 SU, instantaneous minimum 9.0 SU, instantaneous maximum|
|Alpha-Terpineol||Benchmark Monitoring Not Required||0.042 mg/L daily maximum|
|0.019 mg/L calendar month average|
|Aniline||Benchmark Monitoring Not Required||0.024 mg/L daily maximum|
|0.015 mg/L calendar month average|
|Benzoic Acid||Benchmark Monitoring Not Required||0.119 mg/L daily maximum|
|0.073 mg/L calendar month average|
|Naphthalene||Benchmark Monitoring Not Required||0.059 mg/L daily maximum|
|0.022 mg/L calendar month average|
|p-Cresol||Benchmark Monitoring Not Required||0.024 mg/L daily maximum|
|0.015 mg/L calendar month average|
|Pyridine||Benchmark Monitoring Not Required||0.072 mg/L daily maximum|
|0.025 mg/L calendar month average|
1The benchmark values of some metals are influenced by water hardness. For these parameters, the Permittee may determine the hardness of the stormwater discharges to identify the applicable ‘hardness range’ for determining their benchmark value. See Table 4 of Appendix B for hardness dependent benchmark values in accordance with Minn. R. 7050.0222 and Minn. R. 7052.0100.
2If the Permittee is required to comply with Appendix A, part F.1, the benchmark value for Solids, Total Suspended (TSS) is 65 mg/L, instead of 100 mg/L.
3As set forth at 40 CFR Part 445 Subpart A, these numeric limitations apply to contaminated stormwater discharges from hazardous waste landfills subject to the provisions of RCRA Subtitle C at 40 CFR Parts 264 (Subpart N) and 265 (Subpart N) except for any of the following facilities:
4For purposes of benchmark pH monitoring, the Permittee is required to report instantaneous results only, and not a calculation of pH averages. pH measurements are logarithmic, and the Agency will be performing a logarithmic average for this parameter using the instantaneous results submitted.
a. Industrial Stormwater Ponds
1. The Permittee of a sector K industrial facility not operating as a Solid Waste Management Unit (SWMU) with outdoor storage is authorized to use industrial stormwater ponds for stormwater management without additional restrictions.
2. The Permittee of a sector K industrial facility operating as a SWMU with outdoor storage is authorized to use industrial stormwater ponds for stormwater management provided that any industrial stormwater pond constructed after the effective date of this permit meets the following design criteria. Any Permittee required to comply with this part is not authorized to utilize the benchmark monitoring waiver described in Part V.B.6.a of the permit.
a. The industrial stormwater pond must be lined with a synthetic liner that is chemically compatible with materials expected to enter the pond, must be Ultra Violet (UV) stable, and must be designed to restrict infiltration to less than 500 gallons per acre per day.
b. The industrial stormwater pond must be designed in accordance with accepted engineering practices. (See Agency “Recommended Pond Design Criteria” December 2009, Document number: wq-wwtp5-53 and any applicable supporting technical criteria)
b. Infiltration Devices
1. The Permittee of a sector K industrial facility not operating as a SWMU with outdoor storage is authorized to use a designed infiltration device for industrial stormwater management and is not required to comply with Part VII.K.8.b.2, below.
2. The Permittee of a sector K industrial facility operating as a SWMU with outdoor storage is authorized to use a designed infiltration device, implemented prior to the effective date of this permit, for stormwater management provided the Permittee complies with the following requirements:
a. The Permittee shall conduct benchmark monitoring in accordance with the terms and conditions of Part V of all industrial stormwater prior to infiltration. However, any Permittee required to comply with this part that is using a designed infiltration device to manage industrial stormwater is not authorized to utilize the benchmark monitoring waiver described in Part V.B.6.a of the permit.
b. If the Permittee has a designed infiltration device operating prior to the effective date of this permit, the Permittee is authorized to continue using that device. However, on or after the effective date of this permit, the Permittee is not authorized to construct new infiltration devices, expand infiltration activities or practices that result in infiltration, or expand volume of infiltration.