Iowa Admin. Code r. 567-62.8 - Effluent limitations or pretreatment requirements more stringent than the effluent or pretreatment standards
(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.
Notes
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