Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 1 - Introduction › Section 252:656-1-2 - Definitions

Current through Vol. 41, No. 20, July 1, 2024
In addition to terms defined in Title 27A of the Oklahoma
				  Statutes, the following words or terms, when used in this Chapter, shall have
				  the following meaning unless the context clearly indicates otherwise:
"25-year flood"
means a flood event that has a 4
				  percent chance of being equaled or exceeded in magnitude in any given
				  year.
"100-year flood"
means a flood event that has a
				  1 percent chance of being equaled or exceeded in magnitude in any given
				  year.
"208 Plan"
means an area wide wastewater
				  treatment management plan that states are required to submit to EPA for
				  approval pursuant to section
				  208 of the Clean Water Act,
				  33 U.S.C. §
										1288.
"ASTM"
means the American Standard Testing
				  Method and Material.
"Biosolids"
means organically treated wastewater
				  materials from municipal wastewater treatment plants that are suitable for
				  recycling as a soil amendment. This term is within the meaning of "sludge" as
				  defined in 27A O.S. § 2-6-101(11). Biosolids are divided into the
				  following classes:
(A) Class A
				Biosolids meets the pathogen reduction requirements of
				40 CFR §
										503.32(a);
(B) Class B Biosolids meets the pathogen
				reduction requirements of 40
				CFR §
										503.32(b).
"BOD"
means total 5-day biochemical oxygen
				  demand.
"Bypass"
means the intentional or unintentional
				  diversion of a waste stream from any portion of a wastewater treatment
				  system.
"CBOD"
means 5-day carbonaceous biochemical
				  oxygen demand.
"Cell"
means an individual basin of a lagoon
				  system.
"cfm"
means cubic feet per minute.
"Collection system"
means pipelines or conduits,
				  pumping stations, force mains and all other facilities used to collect or
				  conduct wastewater to a treatment works.
"CT"
means the product of residual disinfectant
				  concentration, (C) in (mg/l), and the corresponding disinfectant contact time
				  (T) in minutes, i.e., C x T. CT requirements for a variety of disinfectants and
				  conditions are in the EPA Guidance Manual to the Surface Water Treatment Rule.
"DEQ"
means the Oklahoma Department of
				  Environmental Quality.
"Design-build"
means a project delivery method
				  in which one entity works under a single contract with the project owner to
				  provide design and construction services.
"Design package"
means a submittal to DEQ for an
				  approvable design-build flexible construction permitting process. The number
				  and scope of design packages is defined and set in the approved engineering
				  report with the last design package encompassing the final and completed 100%
				  project design.
"Discharge point"
means the point at which
				  wastewater enters Waters of the State or become Waters of the State.
"Domestic wastewater"
means wastewater from
				  drinking fountains, showers, toilets, lavatories and kitchens.
"End-of-pipe"
means the terminal points in all
				  reclaimed water users' distribution systems.
"Engineer"
means a person licensed to practice
				  engineering in Oklahoma.
"Flexible permitting process"
means construction
				  permitting for a design-build project that is approved to start construction
				  with multiple design packages, noting that an approved DEQ construction permit
				  is required before construction or modification of a wastewater collection
				  system or treatment works begins. Construction is limited to the scope of the
				  approved design package(s).
"fps"
means feet per second.
"Freeboard"
means the vertical distance from the
				  surface water level to the overflow elevation in a treatment unit.
"GPM"
means gallons per minute.
"Land application"
means the controlled
				  application of treated wastewater onto the land surface for beneficial use.
"MGD"
or
"mgd"
means million
				  gallons per day.
"MLSS"
means mixed liquor suspended solids.
"MLVSS"
means mixed liquor volatile suspended
				  solids.
"New technology"
means any method, process or
				  equipment which is used to treat or convey sewage which is not addressed in
				  this Chapter. This does not refer to innovative technology as defined by 40 CFR
				  Part 35 .
"NPDES"
means the National Pollution Discharge
				  Elimination System.
"OAC"
means Oklahoma Administrative Code.
"OSHA"
means the Occupational Health and Safety
				  Administration.
"Open storage basin"
means an uncovered basin,
				  below or above ground level, that is designed, maintained and operated to store
				  Category 2 or 3 reclaimed water.
"Person"
means any individual, company,
				  corporation, government agency, municipality, or any other entity.
"Population equivalent"
and
"PE"
mean the calculated population which would normally contribute the same amount
				  of biochemical oxygen demand (BOD) per day of wastewater. It is computed on the
				  basis of 0.17 lb. of 5-day BOD per capita per day.
"PSRP"
means process to significantly reduce
				  pathogens.
"PVC"
means polyvinyl chloride.
"Reclaimed water"
means wastewater that has gone
				  through various treatment processes to meet specific water quality criteria
				  with the intent of being used in a beneficial manner.
"Retention time"
means the theoretical time
				  required to displace the contents of a tank or treatment unit at a given rate
				  of flow (volume divided by rate of flow).
"Riprap"
means a permanent, erosion resistant
				  ground cover that consists of hard, sound durable stones that average in weight
				  between thirty to fifty pounds (30-50 lbs), with no more than twenty percent
				  (20%) weighing less than twenty pounds (20 lbs).
"Service line"
means a wastewater line that
				  connects an individual home, building or business to a permitted collection
				  system.
"Total Kjeldahl nitrogen (TKN)"
means the total
				  of the organic and ammonia nitrogen.
"Treatment works"
means any plant, disposal
				  field, lagoon, incinerator or other facility used to treat, stabilize, hold or
				  reclaim non-industrial wastewater.
"UL"
means Underwriters Laboratories Inc.
" U.S.C."
means United States Code.
"Variation"
means change from the adopted or
				  current standards for equipment, material or process.
"Wastewater system"
means a collection system
				  and treatment works.
"Water reuse system"
means a treatment and
				  distribution system designed to treat and supply reclaimed water.
Added at 17 Ok Reg 1140,
				  eff 6-1-00; Amended at 23 Ok Reg 937, eff 6-15-06; Amended at 28 Ok Reg 1282,
				  eff 7-1-11; Amended at 29 Ok Reg 1061, eff
				  7-1-12