Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 628 - Indirect Potable Reuse for Surface Water Augmentation › Subchapter 1 - General Provisions › Section 252:628-1-2 - Definitions

Current through Vol. 41, No. 20, July 1, 2024
In addition to the definitions contained in the
				  Environmental Quality Code (27A O.S. Section 2-1-101 et seq.), the following
				  words and terms, when used in this Chapter, shall have the following meaning,
				  unless the context clearly indicates otherwise:
"BOD5"
means 5-day
				  biochemical oxygen demand.
"CBOD5"
means 5-day
				  carbonaceous biochemical oxygen demand.
"Conservative parameter"
means a parameter which
				  persists in the environment, having characteristics which are resistant to
				  ordinary biological or biochemical degradation.
"Constituents of Emerging Concern (CECs)"
means
				  a group of synthetic or naturally occurring chemicals that are not currently
				  regulated under the Clean Water Act (CWA) or Safe Drinking Water Act (SDWA) and
				  are not commonly monitored in the environment. These constituents are to be
				  evaluated in IPR Source Water treatment. Examples of CECs are chemicals in the
				  following categories: prescription and nonprescription drugs, home care
				  products, veterinary and human antibiotics, industrial and household products,
				  sex and steroidal hormones, other endocrine disrupters, and engineered
				  nanomaterials. Selected constituents may be surrogates for a broader list of
				  constituents for use in evaluating overall levels in treated IPR Source Water
				  or for reservoir evaluation.
"CPI"
means Consumer Price Index. See Section
				  628-1-4(e) for additional information.
"DEQ"
means the Oklahoma Department of
				  Environmental Quality.
"DMR"
means discharge monitoring report.
"Disinfection"
means the selective destruction
				  of pathogens in water.
"Drought of Record"
means, for reservoirs, the
				  month with the highest concentration of a given conservative parameter as
				  predicted by hydrologic and mass balance considerations. For stream IPR
				  projects, the drought of record means the lowest monthly average streamflow
				  over a minimum 40 year period of record or other period of record as approved
				  by DEQ.
"HAB"
means harmful algal bloom.
"Hydrologic Mass Balance (HMB) Model"
means a
				  minimum monthly time-step model which uses hydrologic data over a period of
				  record from 1950 to the present, or other period of record as required or
				  approved by DEQ, and may be used to estimate the concentration of a
				  conservative parameter in a reservoir or stream over time. Other models, with
				  DEQ approval, may be substituted for an HMB Model.
"Industrial facilities"
means those facilities
				  that produce, treat or dispose of wastewater not otherwise defined as domestic
				  wastewater, including the runoff and leachate from areas that receive
				  pollutants associated with industrial or commercial storage, handling or
				  processing.
"IPR"
means Indirect Potable Reuse.
"IPR Source Water"
means water originating from
				  a municipal wastewater treatment facility that meets the benchmarks, treatment,
				  and operational standards of this Chapter and has been permitted under an OPDES
				  wastewater permit for release to a surface water source for a PWS system for
				  the purpose of augmenting the flow to an existing PWS system intake.
"IPR Source Water Treatment"
means any method,
				  technique, or process which changes the physical, chemical, biological
				  character, or composition of municipal secondary treated wastewater for the
				  purpose of meeting the benchmarks, treatment, and operational standards
				  contained herein for IPR Source Water.
"IPR Source Water Treatment Plant (IPR SWTP)"
means any plant or other works used for the purpose of treating, stabilizing,
				  or holding IPR Source Water.
"LMR"
means lake and stream monitoring
				  report.
"MOR"
means monthly operating report.
"MQL"
means minimum quantifiable level.
"Non-conservative parameter"
means a parameter
				  which undergoes significant short-term degradation or change in the environment
				  other than by dilution.
"NTU"
means Nephelometric Turbidity Unit.
"O&M"
means Operation and
				  Maintenance.
"Operator"
means the individual who is properly
				  certified by DEQ and who is responsible for the maintenance and operation of an
				  IPR Source Water Treatment Plant.
"OWQS"
means the Oklahoma Water Quality
				  Standards, contained at OAC 252:730.
"pH"
means the negative common logarithm of the
				  hydrogen-ion activity in moles per liter, as determined using approved
				  methods.
"Secondary treatment"
means wastewater treatment
				  to a level that will achieve the effluent limitations specified in OAC
				  252:606-5-2.
"Surface water"
means waters of the state
				  located upon the surface of the earth.
"Surrogate"
means an individual chemical or
				  measurement that provides an indication of treatment process performance and/or
				  represents the presence of a broader range of similar chemicals.
"SWS-R"
means waterbodies classified as
				  sensitive public and private water supplies that may be augmented with
				  reclaimed water for the purpose of indirect potable reuse.
"TDS"
means total dissolved solids.
"TOC"
means total organic carbon.
"TRC"
means total residual chlorine.
"TRO"
means total residual oxidant.
"TSS"
means total suspended
				  solids.