West Virginia Code of State Rules › Agency 64 - Health › Title 64 - LEGISLATIVE RULE WEST VIRGINIA DEPARTMENT OF HEALTH AND HUMAN RESOURCES › Series 64-77 - Public Water Systems Design Standards › Section 64-77-5 - Source development

Current through Register Vol. XLI, No. 28, July 12, 2024
5.1.
				General. -- In selecting the source of water to be developed, the public water
				system's engineer shall prove to the satisfaction of the BPH that an adequate
				quantity of water will be available, and that the water that is to be delivered
				to the consumers will meet the current requirements of the rule of the Bureau
				for Public Health, Public Water Systems, 64CSR3, with respect to
				microbiological, physical, chemical and radiological qualities. Each water
				system shall take its raw water from the best available source that is
				economically reasonable and technically possible.
5.2. Surface Water System. -- A surface water
				source includes all tributary streams and drainage basins, natural lakes,
				artificial reservoirs or impoundments above the point of water system intake
				and ground water under the direct influence of surface water. A source water
				protection plan shall be adopted by the public water system for the continued
				protection of the watershed from potential sources of contamination.
5.2.a. Quantity. -- The quantity of water at
				the source: shall be adequate to meet the maximum projected water demand of the
				service area as shown by calculations based on a one in fifty year drought or
				the extreme drought of record; shall provide a reasonable surplus for
				anticipated growth; shall be adequate to compensate for all losses such as
				silting, evaporation, seepage, etc.; shall be adequate to provide ample water
				for other legal users of the source; and shall provide minimum six (6) months
				storage based on average daily demand for all drainage basins, natural lakes
				and artificial reservoirs or impoundments.
5.2.b. Quality. -- A sanitary survey and
				study shall be made of the factors, both natural and man- made, that may affect
				the quality of the surface water. This survey and study shall include, but not
				be limited to: determining possible future uses of impoundments or reservoirs;
				determining the degree of control of watershed by the owner; assessing the
				degree of hazard to the supply by accidental spillage of materials that may be
				toxic, harmful or detrimental to treatment processes; obtaining samples over a
				sufficient period of time to assess the microbiological, physical, chemical and
				radiological characteristics of the water; assessing the capability of the
				proposed treatment process to reduce contaminants to applicable standards; and
				consideration of currents, wind and ice conditions, and the effect of confluent
				streams.
5.2.c. Minimum Treatment.
				-- The design of the water treatment plant shall consider the worst conditions
				that may exist during the life of the facility. The minimum treatment required
				shall be determined by the BPH. Filtration preceded by pretreatment approved by
				the BPH shall be provided for all surface waters.
5.2.d. Structures.
5.2.d.1. Design of intake structures shall
				provide for: withdrawal of water from more than one level if quality varies
				with depth; separate facilities for release of less desirable water held in
				storage; where frazil ice may be a problem, holding the velocity of flow into
				the intake structure to a minimum, generally not to exceed 0.5 feet per second;
				inspection manholes every one thousand (1000) feet for pipe sizes large enough
				to permit visual inspection; periodic cleaning of the inlet line; and adequate
				protection against rupture by dragging anchors, ice, etc. Ports shall be
				located above the bottom of the stream, lake or impoundment, but at sufficient
				depth to be kept submerged at low water levels. Where shore wells are not
				provided, a diversion device shall be capable of keeping large quantities of
				fish or debris from entering an intake structure and of controlling zebra
				mussels where applicable.
5.2.d.2.
				Raw Water pumping wells shall: have electrical controls located above grade and
				above the one hundred (100) year flood elevation; be accessible; be designed
				against flotation; be equipped with removable or traveling screens before the
				pump suction well; provide for introduction of a disinfectant or other
				chemicals in the raw water transmission main if necessary for quality control;
				have intake valves and provisions for backflushing or cleaning by a mechanical
				device and testing for leaks, where practical; have provisions for withstanding
				surges where necessary and include provisions for adequate ventilation for
				maintenance personnel.
5.2.d.3. An
				off-stream reservoir is a facility where water is pumped during periods of good
				quality and high stream flow for future release to treatment facilities. These
				off-stream reservoirs shall be constructed to assure that: water quality is
				protected by controlling runoff into the reservoir; dikes are structurally
				sound and protected against wave action and erosion; intake structures and
				devices meet requirements of this section; point of influent flow is separated
				from the point of withdrawal; and separate pipes are provided for influent to
				and effluent from the reservoir.
5.2.e. Impoundments and reservoirs.
5.2.e.1. Site preparation shall provide,
				where applicable: for the removal of brush and trees to high water elevation;
				for protection from floods during construction; for the abandonment of all
				water wells that will be inundated, in accordance with requirements of the BPH;
				and for the abandonment of all oil and gas wells in accordance with WVDEP oil
				and gas regulations.
5.2.e.2.
				Construction may require: approval from the WVDEP of the safety features for
				stability and spillway design; a permit from the WVDEP for controlling stream
				flow or installing a structure on the bed of a stream or interstate waterway; a
				withdrawal permit; and a U.S. Army Corps of Engineers permit.