Nebraska Administrative Code › Topic - HEALTH AND HUMAN SERVICES SYSTEM › Title 179 - PUBLIC WATER SYSTEMS › Chapter 25 - LONG TERM 2 (LT2) ENHANCED SURFACE WATER TREATMENT › Section 179-25-002 - DEFINITIONS

Current through June 17, 2024
Bag filters
mean pressure-driven
				  separation devices that remove particulate matter larger than one micrometer
				  using an engineered porous filtration media. They are typically constructed of
				  a non-rigid, fabric filtration media housed in a pressure vessel in which the
				  direction of flow is from the inside of the bag to the outside.
Bank filtration
means a water
				  treatment process that uses a well to recover surface water that has naturally
				  infiltrated into ground water through a river bed or bank(s). Infiltration is
				  typically enhanced by the hydraulic gradient imposed by a nearby pumping water
				  supply or other well(s).
Cartridge filters
mean
				  pressure-driven separation devices that remove particulate matter larger than
				  one micrometer using an engineered porous filtration media. They are
				  typically
constructed as rigid or semi-rigid, self-supporting filter
				  elements housed in pressure vessels in which flow is from the outside of the
				  cartridge to the inside.
Combined distribution system
means
				  the interconnected distribution system consisting of the distribution systems
				  of wholesale systems and of the consecutive systems that receive finished
				  water.
Consecutive system
means a public
				  water system that receives some or all of its finished water from one or more
				  wholesale systems. Delivery may be through a direct connection or through the
				  distribution system of one or more consecutive systems.
Department
means the Division of
				  Public Health of the Department of Health and Human Services.
Director
means the Director of
				  Public Health of the Division of Public Health or his/her authorized
				  representative.
EPA
means the United States
				  Environmental Protection Agency.
Finished water
means water that is
				  introduced into the distribution system of a public water system and is
				  intended for distribution and consumption without further treatment, except as
				  treatment necessary to maintain water quality in the distribution system (e.g.,
				  booster disinfection, addition of corrosion control chemicals).
Flowing stream
means a course of
				  running water flowing in a definite channel.
Ground Water Under the Direct Influence of
				  Surface Water (GWUDI)
means any water beneath the surface of the
				  ground with significant occurrence of insects or other macroorganisms, algae,
				  or large-diameter pathogens such as
Giardia lamblia
or
Cryptosporidium
, or significant and relatively rapid shifts in
				  water characteristics such as turbidity, temperature, conductivity, or pH which
				  closely correlate to climatological or surface water conditions. Direct
				  influence must be determined for individual sources in accordance with criteria
				  established by the Director. The Director's determination of direct influence
				  may be based on site-specific measurements of water quality and/or
				  documentation of well construction characteristics and geology with field
				  evaluation as described in 179 NAC 13 Attachment 2.
Lake/reservoir
means a natural or
				  man-made basin or hollow on the Earth's surface in which water collects or is
				  stored that may or may not have a current or single direction of flow.
Membrane filtration
means a
				  pressure or vacuum driven separation process in which particulate matter larger
				  than one micrometer is rejected by an engineered barrier, primarily through a
				  size-exclusion mechanism, and which has a measurable removal efficiency of a
				  target organism that can be verified through the application of a direct
				  integrity test. This definition includes the common membrane technologies of
				  microfiltration, ultrafiltration, nanofiltration, and reverse osmosis.
Minor Deficiency
means any
				  deficiency found during a sanitary survey that is not a significant
				  deficiency.
Plant intake
means the works or
				  structures at the head of a conduit through which water is diverted from a
				  source (e.g., river or lake) into the treatment plant.
Presedimentation
means a
				  preliminary treatment process used to remove gravel, sand and other particulate
				  material from the source water through settling before the water enters the
				  primary clarification and filtration processes in a treatment plant.
Sanitary survey
means an onsite
				  review of the water source (identifying sources of contamination by using
				  results of source water assessments where available), facilities,
equipment, operation, maintenance, and monitoring compliance
				  of a PWS to evaluate the adequacy of the PWS, its sources and operations, and
				  the distribution of safe drinking water.
Significant deficiency
means a
				  defect in design, operation, or maintenance, or a failure or malfunction of the
				  sources, treatment, storage, or distribution system found during a sanitary
				  survey that the Department determines to be causing, or has the potential for
				  causing the introduction of contamination into the water delivered to
				  consumers.
Two-stage lime softening
means a
				  process in which chemical addition and hardness precipitation occur in each of
				  two distinct unit clarification processes in series prior to filtration.
Uncovered finished water storage
				  facility
means a tank, reservoir, or other facility used to store
				  water that will undergo no further treatment to reduce microbial pathogens
				  except residual disinfection and is directly open to the atmosphere.
Wholesale system
means a public
				  water system that treats source water as necessary to produce finished water
				  and then delivers some or all of that finished water to another public water
				  system. Delivery may be through a direct connection or through the distribution
				  system of one or more consecutive systems.