Okla. Admin. Code § 252:628-1-2
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.
Okla. Admin. Code § 252:628-1-2