Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 628 - Indirect Potable Reuse for Surface Water Augmentation › Subchapter 1 - General Provisions › Section 252:628-1-3 - Applicability and general requirements

Current through Vol. 41, No. 20, July 1, 2024
(a)
Applicability.
The requirements of this Chapter apply to an
				applicant proposing the use of IPR Source Water to augment an existing source
				for a Public Water Supply (PWS) system. Permitted wastewater discharges
				existing as of the date of the initial promulgation of this rule are not
				considered IPR discharges subject to the rules in this Chapter.
(b)
Indirect Potable Reuse (IPR) for
				surface water (lake) augmentation.
This type of planned water reuse
				involves the discharge of treated wastewater to a surface waterbody by an
				entity for the purpose of augmenting a lake serving as a source for a PWS
				system. These rules apply to discharges to both SWS-R waterbodies and other
				reservoirs designated with the Public and Private Water Supply beneficial use
				in the Oklahoma Water Quality Standards (OWQS), or upstream of such reservoirs.
				Discharges to reservoirs designated as SWS-R by the DEQ shall be regulated in
				accordance with DEQ anti-degradation policy.
(c)
Indirect Potable Reuse (IPR) for
				surface water (streams and rivers) augmentation.
Based on DEQ's
				evaluation of flow rates, travel times, distance to water intakes, and other
				factors, certain discharges of treated municipal wastewater to streams and
				rivers that serve as a source for a PWS system may also be determined to be IPR
				and subject to these rules.
(d)
Requirements.
In general, municipal wastewater effluent that has
				been treated to secondary standards will need advanced treatment in order to
				meet, at a minimum, the IPR effluent benchmarks in Subchapter 3 of this Chapter
				as well as the technology and operational standards described in Subchapters 5
				and 7 of this Chapter. In addition, the applicant and their design engineer
				shall meet the certification and contingency planning requirements of this
				Subchapter.
(e)
Human Health
				Protection.
The goal of these rules is to manage the risk to public
				health, safety, and welfare from the discharge of IPR Source Water for surface
				water augmentation.
(f)
Potential Impacts.
The decision by an applicant to augment an
				existing source for a PWS system with IPR Source Water is a voluntary activity
				by the applicant. The applicant should undertake all measures, whether required
				in this rule or not, to ensure the protection of human health and the
				environment.
(g)
Certification.
Engineering reports and plans and specifications
				shall be signed and sealed by a professional engineer registered in the State
				of Oklahoma certifying that the submittal was prepared in accordance with good
				engineering practice. In addition to this certification, the responsible
				official for the applicant shall submit a cover letter stating that the project
				will meet the applicable requirements of this Chapter.
(h)
Contingency Plan.
The
				applicant shall submit to DEQ for approval a contingency plan describing the
				steps the applicant will take in the event of an adverse public health
				situation developing in the receiving waterbody as a result of the applicant's
				discharge, including but not limited to, harmful algal blooms and harmful
				concentrations of other pollutants. The plan shall evaluate steps for lake
				water quality restoration as well as provisions for supplying potable water to
				the citizens impacted by loss of the PWS system source. The applicant shall
				demonstrate the capability to respond to the temporary loss of a PWS system
				source due to IPR impacts.