North Dakota Administrative Code › Title 33.1 - Department of Environmental Quality › Article 33.1-17 - Public Water Supply Systems › Chapter 33.1-17-01 - Public Water Supply Systems in North Dakota › Section 33.1-17-01-02 - Definitions

Current through Supplement No. 393, July, 2024
For the purpose of this chapter the following definitions
				  shall apply:
1. "Action level" means
				the concentration of lead or copper in water specified in title 40 Code of
				Federal Regulations part 141, subpart I, section 141.80(c), that determines, in
				some cases, the treatment requirements set forth under title 40 Code of Federal
				Regulations part 141, subpart I, that a water system is required to
				complete.
2. "Bag filters" means
				pressure-driven separation devices that remove particulate matter larger than
				one micrometer using an engineered porous filtration media.They are typically
				constructed of a nonrigid, fabric filtration media housed in a pressure vessel
				in which the direction of flow is from the inside of the bag to the
				outside.
3. "Bank filtration" means
				a water treatment process that uses a well to recover surface water that has
				naturally infiltrated into ground water through a riverbed or riverbanks.
				Infiltration is typically enhanced by the hydraulic gradient imposed by a
				nearby pumping water supply or other wells.
4. "Best available technology" or "BAT" means
				the best technology, treatment techniques, or other means which the department
				finds, after examination for efficacy under field conditions and not solely
				under laboratory conditions, are available (taking cost into consideration).
				For the purposes of setting maximum contaminant levels for synthetic organic
				chemicals, any best available technology must be at least as effective as
				granular activated carbon.
5.
				"Cartridge filters" means 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 semirigid,
				self-supporting filter elements housed in pressure vessels in which flow is
				from the outside of the cartridge to the inside.
6. "Clean compliance history", for the
				purposes of subpart Y, means a record of no MCL violations as specified in
				title 40 Code of Federal Regulations part 141.63; no monitoring violations as
				specified in title 40 Code of Federal Regulations part 141.21 or as specified
				in title 40 Code of Federal Regulations part 141, subpart Y; and no coliform
				treatment technique trigger exceedances or treatment technique violations as
				specified in title 40 Code of Federal Regulations part 141, subpart
				Y.
7. "Coagulation" means a process
				using coagulant chemicals and mixing by which colloidal and suspended materials
				are destabilized and agglomerated into flocs.
8. "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.
9. "Community water system"
				means a public water system which serves at least fifteen service connections
				used by year-round residents or regularly serves at least twenty-five
				year-round residents.
10.
				"Compliance cycle" means the nine-year calendar year cycle during which public
				water systems must monitor for inorganic and organic chemicals excluding lead,
				copper, trihalomethanes, and unregulated contaminants. Each compliance cycle
				consists of three 3-year compliance periods.
11. "Compliance period" means a three-year
				calendar year period within a compliance cycle during which public water
				systems must monitor for inorganic and organic chemicals excluding lead,
				copper, trihalomethanes, and unregulated contaminants. Each compliance cycle
				has three 3-year compliance periods.
12. "Composite correction program" or "CCP"
				means a systematic, comprehensive procedure for identifying, prioritizing, and
				remedying factors that limit water treatment plant performance as set forth in
				the United States environmental protection agency handbook entitled Optimizing
				Water Treatment Plant Performance Using The Composite Correction Program,
				EPA/625/6-91/027, 1998 edition. A composite correction program consists of two
				phases, a comprehensive performance evaluation and comprehensive technical
				assistance.
13. "Comprehensive
				performance evaluation" or "CPE" means a thorough review and analysis of a
				treatment plant's performance-based capabilities and associated administrative,
				operation, and maintenance practices. It is conducted to identify factors that
				may be adversely impacting a plant's capability to achieve compliance and
				emphasizes approaches that can be implemented without significant capital
				improvements. For purposes of compliance with title 40 Code of Federal
				Regulations part 141, subpart P and subpart T, the comprehensive performance
				evaluation shall consist of at least the following components:
a. Assessment of plant performance;
b. Evaluation of major unit
				processes;
c. Identification and
				prioritization of performance limiting factors;
d. Assessment of the applicability of
				comprehensive technical assistance; and
e. Preparation of a comprehensive performance
				evaluation report.