Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 641 - Individual and Small Public On-Site Sewage Treatment Systems › Subchapter 1 - General Provisions › Section 252:641-1-2 - 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(s) 2-1-101
et
				  seq.
), the following words, terms and acronyms, when used in this
				  Chapter, shall have the following meaning, unless the context clearly indicates
				  otherwise:
"Aerobic treatment unit"
means a treatment unit
				  that provides digestion of organic matter through oxidation and has been tested
				  and certified by an ANSI accredited certifier as meeting the most current
				  ANSI/NSF Standard 40, whether or not it includes nitrogen reduction.
"Alternative system"
means an on-site sewage
				  treatment system that varies from the requirements of on-site sewage treatment
				  systems described in this Chapter.
"ANSI"
means the American National Standards
				  Institute.
"ASTM"
means the American Society for Testing
				  and Materials.
"Certified installer"
means a person in the
				  business of installing or constructing on-site sewage treatment systems who has
				  been certified by the DEQ to inspect and approve his/her own installations.
"Certified soil profiler"
means a person who has
				  been certified by the DEQ to perform soil profile descriptions to be used to
				  design on-site sewage treatment systems.
"Conventional subsurface absorption field"
means
				  a gravity-fed subsurface dispersal field, which may be preceded by a lift
				  station, that provides treatment through soil absorption in media-filled
				  trenches. This does not include ET/A or shallow extended dispersal fields.
"CSA"
means the Canadian Standards Association.
"DEQ"
means the Department of Environmental
				  Quality.
"Designer"
means the person who conducts the
				  soil test and/or completes the DEQ Form 641-581P or 641-581SP for submission to
				  the DEQ.
"Dispersal site
" means the
				  ten-thousand-square-foot (10,000 ft 
				  2) rectangular area that contains the
				  test holes used to design the dispersal field.
"Distribution structure"
means a watertight
				  concrete or plastic compartment, box, or solid piping that allows the
				  distribution of sewage at the same elevation throughout the subsurface
				  treatment field.
"Drip irrigation"
means the use of pressure to
				  distribute aerobically treated effluent to a subsurface dispersal field using
				  small diameter tubing equipped with pressure compensating emitters.
"Evapotranspiration/absorption (ET/A)"
means the
				  subsurface dispersal of sewage for treatment through evaporation, transpiration
				  and absorption.
"Flow equalization tank"
means a storage
				  reservoir that contains an automatically controlled pump that is capable of
				  delivering sewage to an on-site sewage treatment system at a specific hourly
				  rate.
"IAPMO"
means the International Association of
				  Plumbing and Mechanical Officials.
"Individual on-site sewage treatment system"
means an on-site sewage treatment system that treats sewage from one individual
				  residence or a duplex with one owner.
"Installer"
means any person who installs an
				  on-site sewage treatment system or who is in the business of contracting to
				  install or furnishing labor to install on-site sewage treatment systems.
"Level"
means within a four-inch range of the
				  same elevation.
"Lift station"
means a short-term storage
				  reservoir, containing an automatically controlled pump, that pumps sewage to a
				  higher elevation for treatment.
"Low pressure dosing"
means the use of pressure
				  to distribute effluent evenly throughout the dispersal field through small
				  diameter perforated piping.
"Major earth fill area"
means any area where
				  soil has been added to change the elevation from the original ground level by
				  more than one (1) foot.
"Manufactured Media System"
means a system
				  containing a dispersal trench product utilizing a non-gravel, fines-free
				  storage media specifically designed for the dispersal and treatment of sewage.
"Modification"
means the expansion or relocation
				  of any part of an existing on-site sewage treatment system, which does not fall
				  under the definition of new installation.
"New installation"
means the installation of a
				  new on-site sewage treatment system. This includes the replacement of an
				  existing lagoon, aerobic treatment unit and/or dispersal field, even when the
				  existing septic tank is not replaced.
"NSF"
means the National Sanitation
				  Foundation.
"On-site sewage treatment system"
means an
				  individual or small public on-site sewage treatment system as defined in this
				  Chapter.
"Redoximorphic soil features"
means soil that,
				  due to wetness, contains features that exhibit a color of less than or equal to
				  two (2) chroma and greater than or equal to four (4) value in concentrations
				  greater than five percent (5%) in two (2) consecutive intervals.
"Repair"
means the repair of any part of an
				  existing on-site sewage treatment system or the replacement of any part of an
				  existing on-site sewage treatment system as long as the replacement part is
				  placed in the exact same location that the original part had been located.
				  Repair does not include excavation and replacement of a subsurface absorption
				  trench.
"Retention structure"
is a sealed concrete or
				  plastic structure that retains sewage until it reaches a depth of ten inches
				  (10") and then allows it to flow to another trench.
"Rock fragments"
means unattached pieces of rock
				  two millimeters (2 mm) in diameter or larger that are resistant to rupture
				  (strongly cemented or extremely hard).
"Scenic river corridor"
means the two-mile wide
				  area surrounding each scenic river as designated in 82 O.S. Section(s) 1452,
				  with the center of each scenic river being the center of the corridor.
"Sewage"
means wastewater that originates as
				  human waste from activities including but not limited to using toilet
				  facilities, washing, bathing, preparing foods and washing laundry, excluding
				  industrial wastewater.
"Small public on-site sewage treatment system"
means an on-site sewage treatment system, except one that serves an individual
				  residence or duplex, that has an average daily flow of five thousand (5,000)
				  gallons or less.
"Soil profile description"
means the
				  identification and characterization of soil at a specific site.
"Soil texture"
means the percent by weight of
				  sand, silt, and clay for particles smaller than two millimeters (2 mm) in
				  diameter.
"Storage media"
means a natural or manufactured
				  material that provides void spaces for storage and dispersal of effluent in the
				  trenches of a subsurface treatment system.
"Water body"
means any reservoir or stream
				  listed in either the most current "Lakes of Oklahoma" or "Water Quality in
				  Oklahoma Integrated Report."
"Water body protection area"
means the land area
				  around a water body comprised of Zone 1 and Zone 2.
"Water saturated soil"
means soil characterized
				  by either the presence of groundwater or redoximorphic soil features.
"Zone 1"
means the land within three hundred
				  feet (300 ') of the highest normal pool elevation established for a reservoir
				  or within three hundred feet (300 ') of a stream bed.
"Zone 2"
means the land within one thousand
				  three hundred twenty feet (1320') of the highest normal pool elevation
				  established for a reservoir or within one thousand three hundred twenty feet
				  (1320') of a stream bed.
Added at 16 Ok Reg 1895,
				  eff 6-11-99; Amended at 18 Ok Reg 1616, eff 6-1-01; Amended at 19 Ok Reg 45,
				  eff 8-17-01 (emergency); Amended at 19 Ok Reg 1027, eff 6-1-02; Amended at 21
				  Ok Reg 1618, eff 6-11-04; Amended at 25 Ok Reg 2318, eff 7-11-08; Amended at 29
				  Ok Reg 1053, eff 7-1-12