Iowa Administrative Code › Agency 567 - Environmental Protection Commission › Title IV - Wastewater Treatment and Disposal › Chapter 64 - Wastewater Construction and Operation Permits › Rule 567-64.13 - Storm Water Discharges

Current through Register Vol. 47, No. 3, July 24, 2024
(1) The
				following is adopted by reference:
				40
				CFR Section 122.26.
(2) Small municipal separate storm sewer
				systems.
a. For any discharge from a regulated
				small municipal separate storm sewer system (MS4), the permit application must
				be submitted no later than March 10, 2003, if designated under this
				subrule.
b. All MS4s located in
				urbanized areas as defined by the latest decennial census and all MS4s which
				serve 10,000 people or more located outside urbanized areas and where the
				average population density is 1,000 people/square mile or more are regulated
				small MS4s unless waiver criteria established by the department are met and a
				waiver has been granted by the department.
c. Permit coverage requirements for MS4s
				located in urbanized areas and serving 1,000 or more people and fewer than
				10,000 people may be waived if the following requirements are met:
(1) The department has evaluated all waters
				of the United States that receive a discharge from the MS4, and for all such
				waters, the department has determined that storm water controls are not needed
				based on wasteload allocations that are part of an EPA approved or established
				total maximum daily load (TMDL) that addresses the pollutants of concern or, if
				a TMDL has not been developed or approved, an equivalent analysis that
				determines sources and allocations for the pollutants of concern. The
				pollutants of concern include biochemical oxygen demand, sediment or a
				parameter that addresses sediment (total suspended solids, turbidity or
				siltation), pathogens, oil and grease, and any pollutant that has been
				identified as a cause of impairment of any water body that will receive a
				discharge from the MS4.
(2) The
				department has determined that future discharges from the MS4 do not have the
				potential to result in exceedances of water quality standards, including
				impairment of designated uses or other significant water quality impacts
				including habitat and biological impacts.
d. Permit coverage requirements for MS4s
				located in urbanized areas and serving fewer than 1,000 people may be waived if
				the following requirements are met:
(1) The
				system is not contributing substantially to the pollutant loadings of a
				physically interconnected MS4 that is regulated by the NPDES storm water
				program.
(2) The MS4 discharges any
				pollutants that have been identified as a cause of impairment of any water body
				to which the MS4 discharges and the department has determined that storm water
				controls are not needed based upon wasteload allocations that are a part of an
				EPA approved or established TMDL that addresses the pollutants of
				concern.
e. Permit
				coverage requirements for MS4s located outside of urbanized areas and serving
				10,000 or more people may be waived if the following criterion is met:
The MS4 is not discharging pollutants which are the cause of
				  the impairment to a water body designated by the department as
				  impaired.
f. Should
				conditions under which the initial waiver was granted change, the waiver may be
				rescinded by the department and permit coverage may be required.
g. MS4 applications shall, at a minimum,
				demonstrate in what manner the applicant will develop, implement and enforce a
				storm water management program designed to reduce the discharge of pollutants
				from the MS4 to the maximum extent practicable, to protect water quality and to
				satisfy the appropriate water quality requirements of the Clean Water Act. The
				manner in which the permittee will address the following items must be
				addressed in the application: public education and outreach on storm water
				impacts, public involvement and participation, illicit discharge detection and
				elimination, construction site storm water runoff control, postconstruction
				storm water management in new development and redevelopment, and pollution
				prevention for municipal operations. Measurable goals which the applicant
				intends to meet and dates by which the goals will be accomplished shall be
				included with the application.