Washington Administrative Code › Title 246 - Health, Department of › SEWER SYSTEMS › Chapter 246-272C - On-site Sewage System Tanks › PURPOSE AND ADMINISTRATION › Section 246-272C-0020 - Definitions

Current through Register Vol. 24-14, July 15, 2024
(1)
"AASHTO"
means American Association of State and Highway
				  Transportation Officials.
(2)
"Approved"
means a written statement of acceptability issued by
				  the department of health or the local health officer.
(3)
"Baffle"
means a device
				  placed in a sewage tank for multiple functions, including dissipating energy,
				  directing solids, retaining solids, and drawing liquid off at a specific depth.
				  A baffle is not an intercompartmental wall.
(4)
"Cast-in-place tank"
means a
				  sewage tank specifically designed for and constructed at the location where it
				  will be used.
(5)
"Department"
means the Washington state department of
				  health.
(6)
"Designer"
means a person who matches site and soil characteristics with appropriate
				  on-site sewage technology. Throughout this chapter this term applies to on-site
				  wastewater treatment system designers licensed under chapter 18.210
				  RCW.
(7)
"Design
				  engineer"
as used in this chapter, means a professional engineer who is
				  experienced and qualified in the analysis and design of on-site wastewater
				  treatment systems or wastewater treatment system components, and is either
				  licensed in Washington in accordance with chapter 18.43 RCW or is licensed in
				  another state and an exception specified in
				  RCW
				  18.43.130 applies. If the sewage tank is
				  considered a "significant structure," as defined in chapter 18.43 RCW, the
				  design engineer shall be licensed as a structural engineer unless an exception
				  specified in
				  RCW
				  18.43.040 applies.
(8)
"Effluent"
means liquid
				  discharged from a sewage tank or other on-site sewage system
				  component.
(9)
"Greywater"
means domestic type flows from bathtubs, showers,
				  bathroom sinks, washing machines, dishwashers, and kitchen or utility sinks.
				  Greywater does not include flow from a toilet or urinal.
(10)
"Grease interceptor tank"
means a watertight tank similar in design to a septic tank receiving greywater
				  that may contain grease, such as from food service establishments. The
				  interceptor tank is designed and constructed to permit adequate separation of
				  grease from the rest of the sewage prior to discharge into an approved sewage
				  treatment and disposal or dispersal system.
(11)
"Holding tank"
means a
				  sewage tank that is a component of an on-site sewage system designed to receive
				  and temporarily store sewage from one or more facilities or dwellings for
				  removal, dispersal, and ultimate disposal of the sewage at another
				  location.
(12)
"Holding tank
				  sewage system"
means an on-site sewage system that uses a holding tank,
				  the services of a septic pumper, and off-site treatment and disposal of the
				  sewage generated.
(13)
"Installer"
means a person approved by the local health officer to
				  install on-site sewage systems or components, or as defined in chapter 246-272B
				  WAC.
(14)
"Local health
				  officer"
means the individual having been appointed under chapter 70.05
				  RCW as the health officer for the local health department, or having been
				  appointed under chapter 70.08 RCW as the director of public health of a
				  combined city-county health department, or his or her designee appointed by the
				  local board of health.
(15)
"On-site sewage system"
means an integrated system of components,
				  located on or nearby the property it serves, that conveys, stores, treats, or
				  provides subsurface soil treatment and dispersal of sewage. It consists of a
				  collection system, a treatment component or treatment sequence, and a soil
				  dispersal component. An on-site sewage system also refers to a holding tank
				  sewage system or other system that does not have a soil dispersal
				  component.
(16)
"Person"
means any individual, corporation, company, association,
				  society, firm, partnership, joint stock company, or any governmental agency, or
				  the authorized agents of these entities.
(17)
"Prefabricated tank"
means
				  a sewage tank that is manufactured off-site and delivered to the site for
				  installation.
(18)
"Pump
				  tank"
means a tank that contains pumping or dosing equipment.
(19)
"Septage"
means the mixture
				  of solid wastes, scum, sludge, and liquids pumped from within septic tanks,
				  pump chambers, holding tanks, and other on-site sewage system
				  components.
(20)
"Septic
				  pumper"
means a person approved by the local health officer to remove
				  and transport sewage or septage from on-site sewage systems.
(21)
"Septic tank"
means a
				  watertight treatment receptacle receiving the discharge of sewage from a
				  building sewer or sewers; designed and constructed to permit separation of
				  settleable and floating solids from the liquid, and detention and anaerobic
				  digestion of the organic matter, prior to discharge of the liquid.
(22)
"Sewage"
means any urine,
				  feces, and the water carrying human wastes, including kitchen, bath, and
				  laundry wastes from residences, buildings, industrial establishments, or other
				  places.
(23)
"Sewage
				  tank"
means a watertight prefabricated or cast-in-place septic tank,
				  pump tank, holding tank, grease interceptor tank, recirculating filter tank, a
				  tank used with a proprietary product, and any other tank used in an on-site
				  sewage system. This term also includes tanks used in a septic tank effluent
				  pump or vacuum collection/transmission system for an on-site sewage
				  system.
(24)
"Trash
				  tank"
means a type of sewage tank that removes material from sewage that
				  microorganisms cannot degrade before the sewage enters a chamber where
				  decomposition occurs.
(25)
"Watertight"
means liquids are prevented from entering or escaping
				  except through designed openings such as inlets, outlets, intercompartmental
				  wall fittings or baffles.
Statutory Authority: RCW 43.20.050(2) and (3). 09-23-119,
						§ 246-272C-0020, filed 11/18/09, effective
						12/19/09.