Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-291 - Group B public water systems › Section 246-291-010 - Definitions, abbreviations, and acronyms

Current through Register Vol. 24-14, July 15, 2024
The definitions, abbreviations, and acronyms in this section
				  apply throughout this chapter unless the context clearly indicates
				  otherwise.
(1)
"Acute"
means posing an immediate risk to human health.
(2)
"ADD (average day demand)"
means the total volume of water produced from all sources of supply over a
				calendar year divided by three hundred sixty-five.
(3)
"APWA"
means American Public
				Works Association.
(4)
"ASTM"
means American Society for Testing and Materials.
(5)
"AWWA"
means American Water
				Works Association.
(6)
"Board"
means the Washington state board of health.
(7)
"Certified lab"
means an
				analytical laboratory meeting requirements under chapters 246-390 and 173-50
				WAC for one or more drinking water analytical parameters.
(8)
"Coliform bacteria"
means a
				group of rod-shaped bacteria found in the gastrointestinal tract of vertebrate
				animals. The presence of coliform bacteria in water is an indicator of possible
				fecal contamination.
(9)
"Contaminant"
means a substance present in drinking water which
				may adversely affect the health of the consumer or the aesthetic qualities of
				the water.
(10)
"Critical
				water supply service area"
means a geographical area characterized by a
				proliferation of small, inadequate water systems, or by water supply problems
				that threaten the present or future water quality or reliability of service in
				a manner that efficient and orderly development may best be achieved through
				coordinated planning by the water utilities in the area.
(11)
"Cross-connection"
means
				any actual or potential physical connection between a public water system or a
				consumer's water system and any source of nonpotable liquid, solid, or gas that
				could contaminate the potable water supply by backflow.
(12)
"Cross-connection control
				plan"
means a document that identifies the procedures the purveyor uses
				to protect the Group B system from contamination from
				cross-connections.
(13)
"Department"
means the Washington state department of
				health.
(14)
"Disinfection"
means the use of chlorine or other agent or process
				the department approves for killing or inactivating microbiological organisms,
				including pathogenic and indicator organisms.
(15)
"Distribution system"
means
				all piping components of a Group B system that serve to convey water from
				transmission mains linked to source, storage, and treatment facilities to the
				consumer excluding individual services.
(16)
"Drilled well"
means a well
				where the well hole is excavated by mechanical means such as rotary, cable
				tool, or auger drilling equipment.
(17)
"Dwelling unit"
means a
				structure, or unit within a structure, with independent living facilities for
				one or more persons that includes permanent provisions for living, sleeping,
				eating, cooking, and sanitation. A dwelling unit includes, but is not limited
				to:
(a) A single-family residence;
				or
(b) Each unit of an apartment
				building or multifamily building.