Iowa Administrative Code › Agency 567 - Environmental Protection Commission › Title IV - Wastewater Treatment and Disposal › Chapter 62 - Effluent and Pretreatment Standards: Other Effluent Limitations or Prohibitions › Rule 567-62.8 - Effluent Limitations or Pretreatment Requirements More Stringent Than the Effluent or Pretreatment Standards

Current through Register Vol. 47, No. 3, July 24, 2024
(1)
Effluent limitations more
				stringent than the effluent limitation guidelines.
An effluent
				limitation more stringent than the effluent limitation guidelines representing
				the degree of effluent reduction achievable by application of the best
				practicable control technology currently available may be required in an NPDES
				permit if the factors relating to the equipment or facilities involved, the
				process applied, or other such factors related to the discharger are
				fundamentally different from the factors considered by the administrator in the
				establishment of the guidelines. An individual discharger or other interested
				person may submit evidence concerning such factors to the director. On the
				basis of such evidence or other information available to the director, the
				director will make a written finding that such factors are or are not
				fundamentally different for the facility compared to those specified in the
				development document. Any such more stringent effluent limitation must, as a
				condition precedent, be approved by the administrator.
(2)
Effluent limitations necessary to
				meet water quality standards.
No effluent, alone or in combination
				with the effluent of other sources, shall cause a violation of any applicable
				water quality standard. When it is found that a discharge that would comply
				with applicable effluent standards in
				567-623.
				(455B),
				567-624.
				(455B) or
				567-625.
				(455B) or effluent limitations in
				567-626.
				(455B) would cause a violation of water quality standards, the discharge will
				be required to meet the water quality-based effluent limits (WQBELs) necessary
				to achieve the applicable water quality standards as established in 567-Chapter
				61. Any such effluent limit shall be derived from the calculated waste load
				allocation, as described in "Iowa Wasteload Allocation (WLA) Procedure," as
				revised on February 21, 2018, or the waste load allocation as required by a
				total maximum daily load, whichever is more stringent. The translation of waste
				load allocations to WQBELs shall use Iowa permit derivation methods, as
				described in the "Iowa Wasteload Allocation (WLA) Procedure," as revised on
				February 21, 2018, except that the daily sample maximum criteria for
E.
				coli
set forth in 567-Chapter 61 shall not be used as an end-of-pipe
				permit limitation.
(3)
Pretreatment requirements more stringent than pretreatment standards or
				requirements.
The department or the publicly owned treatment works may
				impose pretreatment requirements more stringent than the applicable
				pretreatment standard of
				567-624.
				(455B) or pretreatment requirements of
				567-626.
				(455B) if such more stringent requirements are necessary to prevent violations
				of water quality standards, interference, or pass through.
(4)
Effluent limitations or
				pretreatment requirements in approved areawide waste treatment management
				plans.
Effluent limitations or pretreatment requirements more
				stringent than applicable effluent or pretreatment standards in
				567-623.
				(455B) to
				567-625.
				(455B) or effluent limitations or pretreatment requirements in
				567-626.
				(455B) may be imposed by the department if the more stringent effluent
				limitations or pretreatment requirements are required by an approved areawide
				waste treatment management (208(b)) plan.
(5)
Effluent limitations for
				pollutants not covered by effluent or pretreatment standards.
An
				effluent limitation on a pollutant not otherwise regulated under
				567-623.
				(455B) to
				567-626.
				(455B) (e.g., polybrominated biphenyls, PBBs) may be imposed on a case-by-case
				basis. Such limitation shall be based on effect of the pollutant in water and
				the feasibility and reasonableness of treating such pollutant.