reglab/statecodes huggingface dataset:
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-895 - Pre-engineered package treatment units

Current through Register Vol. 40, No. 24, July 15, 2024
A. Pre-engineered package treatment units are
				defined as predesigned, factory built, and transported virtually assembled to
				the operation site. The provisions of
				12VAC5-590-290
				shall apply.
B. General design
				considerations.
1. A rapid mix unit process
				shall be provided. The design shall meet requirements of 12VAC5-590-871
				A.
2. Flocculation units shall meet
				requirements of 12VAC5-590-871 B or as identified and justified in the approved
				PER.
3. Sedimentation units shall
				meet requirements of 12VAC5-590-872 or as identified and justified in the
				approved PER.
4. Filters shall be
				dual media or multimedia gravity filters. Design of filtration units shall meet
				the requirements of 12VAC5-590-874 or as identified and justified in the
				approved PER.
5. Indicating and
				recording turbidimeters meeting requirements of
				12VAC5-590-770 B
				shall be provided for the:
a. Source
				water;
b. Applied water to each
				filter;
c. Filter effluent from
				each filter; and
d.
				CFE.
6. Sufficient
				overflows and drains shall be provided to maintain a maximum water level within
				the plant, including the depth of water over the filters, and to facilitate
				complete draining of the package unit.
7. Where automatic unit process control is
				provided, operator adjustment of chemical feed rates, times, and sequences
				shall be provided as well as a manual override of all automatic features.
a. Automatic start-up of water treatment unit
				processes is prohibited.
b. Valve
				actuators shall be provided with manual override
				capability.
8. Treatment
				units installed at ground level shall be provided with stairways, walkways, or
				other suitable means to allow access for operation and maintenance and
				observation of all treatment process units. Filters shall be adequately
				accessible to facilitate evaluation of the entire filter bed for media
				condition and placement, fluidization during backwashing, and evaluation of
				compaction during filtration.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-910 - Aeration

Current through Register Vol. 40, No. 24, July 15, 2024
A. Aeration
				treatment is acceptable for oxidation, separation of gases, or for taste and
				odor control. General design requirements include the following:
1. The aerated water shall be chlorinated
				following aeration.
2. The
				equipment shall incorporate materials resistant to deterioration and corrosion
				and shall be designed to eliminate the potential for fouling problems from
				calcium carbonate and iron precipitation and from algae, slime, and
				bacteriological growth. Disinfection capability shall be provided before the
				aeration treatment units.
3. The
				equipment shall be easily accessed and serviced.
4. The air introduced into the treatment
				units shall be filtered and shall be free of insects, obnoxious fumes, dust,
				dirt, and other contaminants. If blowers are located inside a building, then
				the air intakes shall extend to the outside and be furnished with appropriate
				air filters.
5. Air exhaust outlets
				shall be located to avoid induced contaminants, particularly at or near
				occupied areas or blower intakes.
6. Duplicate blowers, motors, or multiple
				treatment units shall be required for treatment processes designed to meet the
				drinking water quality standards in
				12VAC5-590-340.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-930 - Fluoridation

Current through Register Vol. 40, No. 24, July 15, 2024
A. The board
				recommends that all community waterworks in Virginia be optimally fluoridated.
				Fluoridation feed systems shall be designed to deliver the optimum fluoride ion
				concentration as determined by the U.S. Department of Health and Human
				Services.
B. Fluoride compounds.
				Commercial sodium fluoride, sodium fluorosilicate (also called sodium
				silicofluoride), and fluorosilicic acid (also called hydrofluorosilicic acid)
				shall conform to the applicable AWWA standards or NSF/ANSI/CAN Standard
				60-2020, as appropriate.
C.
				Fluoride compound storage. Fluoride chemicals shall be isolated from other
				chemicals to prevent cross contamination. Compounds shall be stored in covered
				or unopened shipping containers in a separate room (except sodium fluoride
				saturators) with the chemical feeder.
D. Chemical feed installations.
1. Scales and loss-of-weight recorders for
				dry chemical feeders and hydrofluorosilicic acid feeders shall be
				provided.
2. Fluoride metering
				pumps shall have an accuracy so that the actual feed rate will be within 5.0%
				of the intended feed rate.
3. The
				point of application shall be located to provide adequate mixing.
4. All fluoride feed lines shall be provided
				with adequate anti-siphon devices.
5. Design of fluoride saturators shall
				consider:
a. The source water hardness. The
				water applied to the sodium fluoride saturator feeders shall be softened if the
				hardness exceeds 50 mg/L.
b. The
				fluoride source. Use only sodium fluoride in the saturators.
c. A flow restrictor with a maximum flow of
				2.0 gpm on all upflow saturators.
6. Adequate fluoride feed rate control and
				mixing shall be provided.
7.
				Provisions shall be made for venting fluorosilicic acid carboys to the outside
				of the building when the carboys are in use.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-940 - Fluoride removal

Current through Register Vol. 40, No. 24, July 15, 2024
A. Fluoride
				removal may be accomplished by blending with a different quality water or by
				removal treatment. Where fluoride removal is required, the treatment units
				shall be designed to achieve a finished water fluoride concentration that is
				below the SMCL.
B. Blending.
				Blended water shall result in all water delivered to the distribution system
				being of the same quality.
C.
				Treatment.
1. Treatment shall include ion
				exchange, activated alumina, bone char, RO, or electrodialysis. The selected
				design shall be supported by pilot studies, unless at least two pilot studies
				or two prototype plants have demonstrated that the selected design is feasible.
				These studies or prototypes shall be for waters having characteristics similar
				to the water that is to be treated.
2. Water pH shall be adjustable to an optimum
				level to achieve the best fluoride removal.
3. With any one unit out of service, the
				remaining units shall be capable of treating the maximum plant flow
				rate.
4. Filter clogging
				constituents such as iron having a concentration greater than 1.0 mg/L shall be
				removed before fluoride removal.
5.
				Test equipment shall be provided and must be accurate to at least 0.1
				mg/L.
6. An operation and
				maintenance manual shall be provided.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-950 - Corrosion control or stabilization

Current through Register Vol. 40, No. 24, July 15, 2024
A. Water that is unstable due either to
				natural causes or to the treatment applied to the water shall be
				stabilized.
B. Deposition of
				calcium carbonate film. The desired calcium carbonate film may be obtained by
				using either soda ash or caustic soda when the alkalinity of the water exceeds
				about 35 mg/L. Soft waters should be treated with lime to provide the required
				calcium. Soft waters that also have a low carbon dioxide content may need a
				mixture of lime and soda ash to provide both calcium and carbonate for the
				calcium carbonate film.
C.
				Phosphates or other corrosion inhibitors may be used for corrosion control when
				applied in accordance with manufacturer recommendations and when they meet the
				requirements of 12VAC5-590-515. Stock phosphate solution shall be disinfected
				in accordance with manufacturer recommendations unless the phosphate solution
				is fed directly from the covered shipping container.
D. Cathodic protection shall be acceptable
				for preventing or reducing corrosion of the inner surfaces of water storage
				tanks and standpipes and the outer surface of metal pipe.
E. Laboratory equipment shall be provided for
				determining the effectiveness of stabilization treatment and the concentration
				of chemicals in the treated water.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-960 - Taste and odor control

Current through Register Vol. 40, No. 24, July 15, 2024
A. The
				continuous or periodic treatment of source waters with copper sulfate and other
				copper compounds to kill algae or other growths shall be controlled to prevent
				a copper concentration in excess of 1.0 mg/L, as copper, in the finished water
				leaving the treatment plant.
B.
				Surface water aerators or diffused aeration systems shall be acceptable for
				de-stratifying reservoirs, reducing or eliminating seasonal turnover, and
				releasing compounds in the anaerobic or anoxic zones.
C. Addition of chemical oxidants at the
				source water intake, in the source water pump station discharge line, at the
				head of the treatment plant, or within the treatment train shall be acceptable
				for treating tastes and odors. Effective oxidants include chlorine, chlorine
				dioxide, potassium permanganate, and ozone. If breakpoint chlorination is
				proposed, then the actual breakpoint of the water shall be determined
				accurately. "Breakpoint chlorination" means the addition of chlorine to water
				until the chlorine demand has been satisfied, chlorine and ammonia nitrogen
				reactions are near completion, and further additions of chlorine result in a
				free chlorine residual that is directly proportional to the amount of chlorine
				added.
D. Powdered activated carbon
				(PAC). When taste and odor problems are anticipated on an intermittent basis,
				the addition of PAC shall be considered, and a pilot study shall be conducted
				to determine the optimum dosage. Multiple PAC feed locations shall be evaluated
				to provide maximum contact time, including the rapid mixer, the flocculation
				basins, and at the midpoint of the sedimentation basins.
1. PAC shall not be applied near the point of
				chlorine or other oxidant application.
2. Continuous agitation or resuspension
				equipment shall be required to keep the PAC from depositing in the slurry or
				storage tank.
3. All mechanisms for
				handling dry PAC shall be tightly sealed. Dust collection is required at all
				installations.
4. The PAC feed
				lines to the application points shall be sized to handle the PAC suspension and
				should be equipped with flushing provisions.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-970

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-975 - Removal of radionuclides

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				Processes for the removal of radionuclides specified as BAT are identified in
				40 CFR
				141.66. The specific process and equipment
				proposed for removal of radionuclides shall to the satisfaction of the
				department have a demonstrated history of successful performance with similar
				water quality characteristics and performance requirements. Otherwise, the
				procedures of
				12VAC5-590-290
				shall apply.
B. When manganese
				greensand filter systems are utilized, the design shall meet the requirements
				of
				12VAC5-590-920
				B. In addition, a chemical contact tank with a minimum detention time of 30
				minutes shall be provided. Laboratory or pilot studies may be required to
				demonstrate compliance with the radium standard when using a filtering
				treatment system for groundwater with total radium greater than 10
				pCi/L.
C. Waste handling, disposal,
				and permitting shall be given special consideration early in the design
				process.
D. Occupational exposure
				shall be considered in the project design.
E. Provisions for operational control
				monitoring of the radionuclides requiring removal or of acceptable surrogates
				shall be included in the project design.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-980

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-985 - GAC contactors

Current through Register Vol. 40, No. 24, July 15, 2024
A. Granular
				activated carbon (GAC) contactors may be used to adsorb natural organic
				compounds, taste and odor compounds, and SOCs. The most common applications of
				GAC contactors in drinking water treatment plants are (i) post-filtration
				adsorption and (ii) filtration-adsorption, in which some or all of the filter
				media in a granular media filter is replaced with GAC.
B. General requirements.
1. A demonstration study using bench-scale or
				pilot-scale tests shall be conducted to determine the GAC media effectiveness,
				adsorption efficiency, and regeneration frequency.
2. GAC contactors shall be sized for the
				optimum empty bed contact time.
3.
				A minimum of two contactor units shall be provided.
4. Bypassing the GAC facility may be
				permissible under certain circumstances to accommodate seasonal water quality
				fluctuations and allow for blending water.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-990 - Waterworks waste

Current through Register Vol. 40, No. 24, July 15, 2024
A. With the
				exception of sanitary sewage and flows recycled through the water treatment
				system, the wastes generated during the operation of water filtration plants
				constitute industrial wastes and are subject to the State Water Control Law
				(Chapter 3.1 (§
									62.1-44.2 et
				seq.) of Title 62.1 of the Code of Virginia).
Industrial wastes generated by water treatment facilities
				  include the following:
1. Filter
				backwash water;
2. Coagulant
				residuals;
3. Softening
				residuals;
4. Iron and manganese
				residuals;
5. Settled solids from
				presedimentation units; and
6.
				Brine wastes.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1000 - Disinfection

Current through Register Vol. 40, No. 24, July 15, 2024
A. The objective of
				disinfection is to prevent the occurrence of waterborne diseases from the
				consumption of drinking water.
B.
				Primary disinfection shall be provided for all surface water sources, all
				spring sources, all GUDI sources, and all well sources determined to be of
				questionable bacteriological quality as required by the department.
				Consideration shall be given to minimizing the formation of DBPs when designing
				a disinfection process. Waterworks with groundwater sources requiring
				disinfection under this section shall meet the requirement of
				12VAC5-590-421
				A 1 d.
C. All pipes, tanks, and
				equipment that convey, store, or treat potable water shall be disinfected with
				chlorine before being placed in service in accordance with the following AWWA
				standards where applicable: C651-14, C652-19, and C653-20.
D. All residual disinfectant determinations
				shall be made using methods identified in
				12VAC5-590-440.
1. The project documents shall outline the
				procedures and include the disinfectant dosage, contact time, and method of
				testing the results of the procedure.
2. Methods of disinfection other than
				chlorination may be considered by the department on a individual
				basis.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1001 - Chlorination

Current through Register Vol. 40, No. 24, July 15, 2024
A. General design
				requirements.
1. Chlorine feed capacity shall
				be capable of meeting the disinfection requirements under all operating
				conditions.
a. Chlorine feed systems for
				primary disinfection at a waterworks using a surface water source, a GUDI
				source, or both shall provide sufficient capacity to achieve the required
				microbial log inactivation specified in Table 500.1.
b. Chorine feed systems for primary
				disinfection at a waterworks using groundwater sources shall provide sufficient
				capacity to achieve 4-log virus inactivation and removal.
c. Chlorine feed systems for secondary
				disinfection at a waterworks shall provide sufficient capacity to achieve a
				minimum chlorine residual at the entry point of 0.2 mg/L for more than 4
				hours.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1002 - Chloramination

Current through Register Vol. 40, No. 24, July 15, 2024
A. Chloramines
				shall be acceptable for secondary disinfection. Chloramines are formed by the
				reaction of ammonia and chlorine. Multiple chemical species may be created;
				however, monochloramine is the desired form.
B. The process shall be controlled to
				minimize formation of dichloramine and nitrogen trichloride, which can create
				objectionable taste and odors. Control should be sufficient to limit free
				ammonia leaving the chloramination facility to no more than 0.1 mg/L as
				nitrogen.
C. pH adjustment
				facilities shall be provided to maintain pH in the range of 7 to 8.
D. When use of chloramines is proposed, the
				potential increase of lead leaching within the distribution system shall be
				considered. Additional distribution system monitoring may be required by the
				department.
E. The owner shall
				inform the public before initiating any disinfection process involving
				chloramines, as directed by the department.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1003 - Chlorine dioxide addition

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				Chlorine dioxide may be considered as a pre-oxidant to control tastes and
				odors, reduce color, oxidize iron and manganese, and reduce DBPPs. Chlorine
				dioxide may be used for primary disinfection. Where chlorine dioxide is used,
				consideration shall be given to the formation of the byproducts chlorite and
				chlorate.
B. Chlorine dioxide is
				generated onsite from sodium chlorite and either chlorine gas or hypochlorite
				solution. Chlorine dioxide generation equipment shall be factory assembled,
				pre-engineered units with a minimum efficiency of 95%. The excess free chlorine
				shall not exceed 3.0% of the theoretical stoichiometric concentration
				required.
C. The owner shall inform
				the public before using chlorine dioxide, as directed by the
				department.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1004 - Ozonation

Current through Register Vol. 40, No. 24, July 15, 2024
A. Ozone may be
				considered as a pre-oxidant to control tastes and odors, reduce color, oxidize
				iron and manganese, reduce DBPPs, and used for primary disinfection. Where
				ozone is used, consideration shall be given to the level of bromide and
				formation of brominated byproducts.
B. Ozone systems are typically comprised of
				four basic subsystems: ozone generation, feed gas preparation, ozone
				contactors, and off-gas disposal.
C. The PER shall evaluate water and gas flow
				rates, oxygen source, generator selection and sizing, contactor design,
				treatment process location, exhaust gas collection and destruction, and
				operator requirements.
D.
				Treatability studies using bench-scale or pilot-scale tests may be required as
				part of the PER to address the following:
1.
				Alternate points of ozone application;
2. Ozone demand tests, applied dose,
				transferred dose, and decay rates; and
3. Ozone byproducts, including bromide and
				bromate analyses.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1010 - Basic pumping facility design criteria

Current through Register Vol. 40, No. 24, July 15, 2024
Pumping facilities shall be designed to maintain the sanitary
				  quality of pumped water. All pumps shall be accessible for servicing and
				  repair.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1020 - Location

Current through Register Vol. 40, No. 24, July 15, 2024
A. The pumping
				station shall be located to meet the hydraulic needs of the distribution
				system, preserve the quality of the water pumped, and shall consider the
				availability of a power or a fuel supply.
B. The station shall be:
1. Elevated to a minimum of one foot above
				the 100-year flood elevation or protected to that elevation;
2. Accessible at all times unless allowed to
				be out of service by the department;
3. Graded around the station so as to lead
				surface drainage away from the station; and
4. Protected to prevent vandalism and
				entrance by animals or unauthorized persons.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1030

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1040 - Pump stations

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				Enclosures.
1. The structure that houses a
				pump shall be of durable construction, fire and weather resistant, and
				furnished with lockable, outward opening doors. Underground structures shall be
				waterproofed.
2. Floors.
a. Pump house floors shall be of good quality
				concrete with adequate reinforcement and have a minimum thickness of six
				inches.
b. Pump house floors shall
				slope at least 1/8 inch per foot toward a screened four-inch-diameter floor
				drain to the atmosphere or other provisions for gravity drainage.
c. The pump house finished floor elevation
				should be at least six inches above the finished grade.
3. Openings in floors or roofs or elsewhere
				for removal of heavy or bulky equipment shall be provided.
a. Craneways, hoist beams, eyebolts, or other
				adequate facilities for servicing or removal of pumps, motors, or other heavy
				equipment shall be provided.
b.
				Adequate means of access shall be provided to lubrication points of equipment
				if these are located at intermediate points between floors.
4. Heat shall be provided for the
				safe and efficient operation of the equipment.
5. Adequate ventilation shall be provided for
				all pumping stations. Forced draft ventilation of at least six changes of air
				per hour (continuous operation) shall be provided for:
a. All rooms, compartments, pits, and other
				enclosures below grade; and
b. Any
				area where an unsafe atmosphere may develop or where excessive heat may build
				up.
6. In areas where
				excess moisture could cause hazards to safety or damage to equipment, means for
				dehumidification shall be provided.
7. Pump stations shall be adequately lighted
				throughout. All electrical work shall conform to the requirements of the
				applicable codes.
8. Stair design
				shall be in accordance with the USBC.
9. Pump stations shall have adequate space
				for the installation of additional units if needed and for the safe servicing
				of all equipment.
10. Pump stations
				shall be designed so that each pump has an individual suction line or the lines
				shall be so manifolded to ensure similar hydraulic and operational
				conditions.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1050 - Pumps and controls

Current through Register Vol. 40, No. 24, July 15, 2024
A. General.
1. Pumps, pump motors, and all accessories
				shall be controlled in a manner that they will operate at their rated capacity.
				Where two or more pumps are installed, provision shall be made for proper
				alternation of the pumps. Alternation may be automatic or manual. Provision
				shall be made to prevent operation of the pump in the event of a backspin
				cycle.
2. All pumps shall be driven
				by motors designed to operate over the full range of operating
				conditions.
3. All pumps shall be
				served by control equipment that has overload protection for the air
				temperature encountered.
4.
				Electrical controls shall be protected to the 100-year flood elevation and
				should be located above grade.
5.
				If standby power is provided by onsite generators or engines, then the
				provisions for filling the fuel storage tank, the fuel tank itself, and the
				fuel line shall be designed to protect the waterworks and source water from
				contamination.
6. Pumps shall be
				lubricated with water of equal or better quality than the water being pumped or
				with food grade oil. Water seals shall not be supplied with water of a lesser
				sanitary quality than that of the water being pumped. Where pumps are sealed
				with potable water and are pumping water of lesser sanitary quality, the seal
				shall:
a. Have an air gap of at least two
				inches or two pipe diameters, whichever is greater, where a break-tank is
				provided; or
b. Be provided with an
				approved RPZ assembly.
7.
				When automatic pre-lubrication of pump bearings is necessary and an auxiliary
				power supply is provided, the pre-lubrication line shall be provided with a
				valved bypass around the automatic control.
8. A suitable outlet for drainage from pump
				glands shall be provided without discharging onto the
				floor.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1060

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1065 - Piping, valves, and meters

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				Piping shall:
1. Be adequately sized to
				minimize energy losses;
2. Not be
				subject to contamination;
3. Have
				watertight joints;
4. Be properly
				anchored to prevent movement;
5. Be
				protected against surge or water hammer;
6. Have proper labels to identify the
				contents of the pipes (12VAC5-590-720
				C); and
7. Have all exposed piping,
				valves, and appurtenances protected against physical damage and
				freezing.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1070

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1080 - Basic finished water storage structure design criteria

Current through Register Vol. 40, No. 24, July 15, 2024
A. The materials
				and designs used for finished water storage structures, including associated
				pipe and valves, shall provide stability and durability as well as protect the
				quality of the stored water. Steel, concrete, composite, and plastic storage
				structures shall be designed, constructed, cleaned, disinfected, and tested in
				accordance with the following AWWA standards, where applicable: D100-11,
				D103-19, D107-16, D108-19, D110-13, D115-20, D120-19, D121-12, and
				C652-19.
B. Safety cages, rest
				platforms, roof-ladder handrails, and other safety devices shall be provided as
				required by VOSH laws and regulations.
C. Location of finished water storage
				structures.
1. The bottom of ground-level
				reservoirs, storage tanks, and standpipes should be placed above finished grade
				to ensure positive drainage away from the structure.
2. Where the bottom must be below normal
				ground surface, it shall be placed above the groundwater table. Sewers, drains,
				standing water, and similar sources of contamination shall be kept at least 50
				feet from the finished water storage structure. Pipe conforming to water
				distribution pipe standards of
				12VAC5-590-1110,
				pressure tested in place without leakage, shall be used for gravity sewers at
				lesser separations.
3. The top of
				all storage facilities shall not be less than two feet above the normal ground
				surface and shall be above the 100-year flood elevation. Any clearwell
				constructed under filters may be exempted from this requirement when the total
				design gives the same protection.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1081 - Atmospheric tank storage

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				Protection.
1. All finished water storage
				structures shall have suitable watertight roofs or covers that exclude birds,
				animals, and insects.
2. All
				finished water storage structures shall be designed to prevent vandalism and
				entrance by animals or unauthorized persons.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1082 - Pressure tank storage

Current through Register Vol. 40, No. 24, July 15, 2024
A. When
				hydropneumatic tanks are used, they shall comply with the requirements of state
				and local laws and regulations for the construction and installation of unfired
				pressure vessels.
B. Pressure tanks
				shall be located above the normal ground surface with the operating end of the
				tank containing the inlet pipe, the pressure gauge, and other appurtenances
				projecting into a building with climate controls to prevent freezing.
				Alternatively, it may be completely housed, if adequate access is provided for
				inspection, removal, and replacement.
C. Pressure tanks shall have bypass piping to
				permit operation of the system while the tank is being cleaned, repaired, or
				painted.
D. Pressure tanks shall
				have an access manway, a drain, and control equipment consisting of a pressure
				gauge, water sight glass, automatic or manual air blowoff, pressure and vacuum
				relief valves, and mechanical means for adding air. Pressure tanks smaller than
				than 120 gallons and bladder tanks are not required to have an access manway,
				sight glass, or vacuum relief valve.
E. Pressure tanks and pumps shall be designed
				to minimize pump cycling and to operate within manufacturer
				recommendations.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1090 - Plant storage

Current through Register Vol. 40, No. 24, July 15, 2024
A. Backwash
				water storage tanks shall be sized in conjunction with available pump units and
				finished water storage to provide the filter backwash water required.
				Consideration shall be given to the possibility of having to wash more than one
				filter at a time or several filters in succession.
B. Clearwell storage shall be sized, in
				conjunction with distribution system storage, to relieve the filters from
				having to follow fluctuations in water use or meet peak demands, including
				filter backwash water. When finished water storage is used to provide proper
				contact time for disinfection, special attention shall be given to size,
				drawdown, and baffling. Plant clearwells shall be equipped with a raised
				viewing port having a clear glass or plastic viewing window and a submerged,
				waterproofed electric light.
C.
				Finished water shall not be stored or conveyed in a compartment adjacent to
				nonpotable water when the two compartments are separated by a single
				wall.
D. Receiving basins and pump
				wet wells for finished water shall be designed as finished water storage
				structures.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1100

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1110 - Distribution system materials

Current through Register Vol. 40, No. 24, July 15, 2024
Pipe, fittings, joints, valves, hydrants, and coatings shall
				  conform to AWWA standards.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1120 - Minimum pipe size

Current through Register Vol. 40, No. 24, July 15, 2024
A. The
				minimum size pipe for water distribution mains shall be four inches in
				diameter. Pipes of lesser diameter may be used in the following instances:
1. When the run is less than 300 feet,
				two-inch diameter pipe may be used.
2. When the run is less than 600 feet but
				more than 300 feet, three-inch diameter pipe may be used.
3. Any departure in sizing shall be justified
				by hydraulic analysis and future water demands.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1130 - Distribution system design

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				Dead-ends should be minimized by the looping of water mains.
B. Where dead-end water mains occur, a means
				of effective flushing shall be provided.
C. No flushing device shall be directly
				connected to any sewer.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1140 - Installation and testing of water mains

Current through Register Vol. 40, No. 24, July 15, 2024
A. Adequate supports and restraints shall be
				provided for all pipes.
B. A
				continuous and uniform bedding shall be provided in the trench for all buried
				pipe.
C. Stones and rocks found in
				the trench shall be removed to a depth of at least six inches below the bottom
				of the pipe and selected fill bedding provided.
D. Installed pipe shall be pressure-tested
				and meet allowable leakage as specified in accordance with AWWA Standards
				C600-17, C604-17, and C605-13, where applicable.
E. Any plastic or other nonmetallic
				pressurized pipe installed underground shall be provided with a material
				conductive of electricity or some other means of locating the buried
				pipe.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1150 - Separation of water mains and sanitary sewers

Current through Register Vol. 40, No. 24, July 15, 2024
A. The following factors shall be considered
				in providing adequate separation of water mains and sanitary sewers:
1. Materials and types of joints for water
				and sanitary sewer mains;
2. Soil
				conditions;
3. Service branch
				connections into the water main and sanitary sewer mains;
4. Compensating variations in the horizontal
				and vertical separations;
5. Space
				for repairs and alterations of water and sanitary sewer mains;
6. Offsetting of pipes around manholes;
				and
7. Identification of the
				physical restraints preventing normal separation.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1160 - Valve, air relief, meter, and blowoff chambers

Current through Register Vol. 40, No. 24, July 15, 2024
A. Standard fire hydrants or blowoffs shall
				be considered to enable removal of sediment and air accumulations.
B. Drains in chambers or pits that contain
				valves, blowoffs, meters, or other appurtenances to a distribution system shall
				not be connected directly to any storm drain or sanitary sewer, nor shall
				blowoffs or air relief valves be connected directly to any sanitary
				sewer.
C. Chambers or pits shall be
				drained to the surface of the ground where they are not subject to flooding by
				surface water or to absorption pits located above the seasonal groundwater
				table elevation. The backfill material for the water main may serve as an
				absorption pit if granular embedment material is laid from the pipe bedding up
				through the final backfill layer for the entire length of pipe in the chamber.
				Sump pumps may be used where other means are not practicable.
D. Chambers or pits shall be designed to
				facilitate air-valve inspection and servicing.
E. Air relief and blowoff piping.
1. The open end of an air relief pipe shall
				be extended from the manhole or enclosing chamber to a point at least one foot
				above ground and provided with a screened, downward facing elbow. The exposed
				pipe and appurtenances shall be protected from vandalism and other
				damage.
2. When an aboveground
				extension is not practical or desired, the open end of the air relief pipe or
				blowoff shall be extended.
a. Where the pit
				or chamber is provided with proper drainage and is not otherwise subject to
				high groundwater levels, surface flooding, ponding, and contaminant or
				pollutant spills, the open end may be provided with a screened, downward facing
				elbow. The valve chamber or pit shall be vented to provide sufficient air flow
				to allow proper operation of the air valve. Air valves fitted with a smooth
				vent port and screened hood are allowable under these conditions.
b. Where the pit or chamber is not properly
				drained or is otherwise subject to high groundwater levels, surface flooding,
				ponding, and contaminant or pollutant spills, a manually operated valve or
				blowoff shall be used and the open end shall be fitted with a watertight cap or
				other means to prevent contamination from entering the pipe and
				valve.
c. The installation and
				testing specifications shall require field verification by the owner's engineer
				of the groundwater elevation and surface water drainage, as needed in
				circumstances or situations where this is of potential concern, before
				placement of the pit or chamber.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1170 - Hydrants

Current through Register Vol. 40, No. 24, July 15, 2024
A. Fire hydrants.
1. To avoid cross-connection and
				contamination, dry barrel fire hydrants:
a.
				Should be located in areas that are not subject to high groundwater, flooding,
				surface water ponding, and contaminant or pollutant spills. When this is not
				practical, consideration shall be given to:
(1) Piping the drain port to daylight with
				screening on the end of the pipe; or
(2) Plugging the drain port and marking the
				hydrant for seasonal dewatering.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1180 - Surface water crossings

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				Surface water crossings, both over and under water, present special challenges
				and shall be discussed with the department before project documents are
				prepared.
B. Aerial water
				crossings. The pipe above water crossings shall be:
1. Adequately supported;
2. Protected from freeze damage;
3. Accessible for repair or replacement;
				and
4. Above the 100-year flood
				elevation.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1190

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1200

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1210 - Disinfection and testing of water mains

Current through Register Vol. 40, No. 24, July 15, 2024
A. All water mains shall be disinfected in
				accordance with AWWA Standard C651-14 before being placed in operation. The
				disinfection of the mains shall be repeated until it is determined by
				bacteriological testing that the water is free of coliform bacteria.
B. Project documents shall provide the
				details of the procedure and include the disinfectant application technique,
				dosage, contact time, method of testing the results of the procedure, and use
				or disposal of the disinfecting water.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1220 - Pipe cover

Current through Register Vol. 40, No. 24, July 15, 2024
All buried distribution pipe shall be provided with
				  sufficient earth or other suitable cover or encasement to prevent from freezing
				  and provide protection from damage by external forces.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1230 - Service connection metering

Current through Register Vol. 40, No. 24, July 15, 2024
A.
				All new service connections in community waterworks shall be metered.
B. Water pipe and appurtenances between the
				water main and the service connection shall conform to all applicable
				codes.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1235 - Water loading stations

Current through Register Vol. 40, No. 24, July 15, 2024
A. The
				station and its piping and valving arrangement shall be designed to prevent
				unauthorized use, tampering, and vandalism.
B. An air gap or RPZ assembly shall be
				provided on the potable water fill connection to prevent backflow into the
				waterworks.
C. The piping and
				valving arrangement shall prevent contaminants from being transferred from a
				hauling tank or vessel to others subsequently using the water loading
				station.
D. Hoses used to fill
				potable water tanks and vessels shall be approved for potable water
				contact.
E. Hoses shall not come
				into contact with the ground or other contaminated surface and shall otherwise
				be handled, maintained, and stored in a manner to prevent
				contamination.
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1240

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1250

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1260

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1270

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Section 12VAC5-590-1280

Current through Register Vol. 40, No. 24, July 15, 2024
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.
Virginia Administrative Code › Title 12 - HEALTH › Agency 5 - DEPARTMENT OF HEALTH › Chapter 590 - WATERWORKS REGULATIONS › Form - FORMS (12VAC5-590)

Current through Register Vol. 40, No. 24, July 15, 2024
Uniform
				  Water Well Completion Report, Form GW-2 (rev. 8/2016)
Application
				  for Monitoring Waivers (rev. 3/2019)
Waterworks
				  Permit Application, ODW-001 (filed 10/2019)
Operational
				  Evaluation Reporting Form (filed 10/2019)
Waterworks
				  Level 1 Assessment (rev. 9/2017)
Waterworks
				  Level 2 Assessment (rev. 9/2017)
Well
				  Yield and Recovery Report Form, ODW-002 (filed
				  10/2020)
Statutory Authority: §§
											32.1-12
					 and
					 32.1-170 of the Code
					 of Virginia.