Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 626 - Public Water Supply Construction Standards › Subchapter 1 - Introduction › Section 252:626-1-2 - Definitions

Current through Vol. 41, No. 20, July 1, 2024
Terms have the meaning assigned in the Environmental Quality
				  Code. The following words or terms, when used in this Chapter, have the
				  following meaning unless the context clearly indicates otherwise:
"25-year flood"
means a flood event that has a 4
				  percent chance of being equaled or exceeded in magnitude in any given
				  year.
"100-year flood"
means a flood event that has a
				  1 percent chance of being equaled or exceeded in magnitude in any given
				  year.
"ANSI"
means the American National Standards
				  institute.
"APHA"
means the American Public Health
				  Association.
"API"
means the American Petroleum
				  Institute.
"Approvable", "Approve", "Approved"
mean a
				  submission to the DEQ that shall be considered a final submission, all
				  preliminary discussions between the DEQ and the permittee regarding the
				  requirements of a submission shall be concluded prior to the submission, so
				  that the submission shall be deemed complete as submitted.
"ASTM"
means the American Society for Testing
				  Materials.
"AWWA"
means the American Water Works
				  Association.
"Board"
means the Environmental Quality
				  Board.
"Calculated dose"
means the RED calculated using
				  the dose-monitoring equation that was developed through validation
				  testing.
"Cartridge filter"
means a filter that is
				  manufactured by placing a flat sheet membrane media between a feed and filtrate
				  support layer and plating the assembly to increase the membrane surface area
				  within the cartridge. The pleat pack assembly is then placed around a center
				  core with a corresponding outer case and subsequently sealed, via adhesive or
				  thermal means, into its cartridge configuration.
"Certified waterworks operator"
means an
				  operator licensed by the State of Oklahoma pursuant to OAC 252:710.
"CFR"
means Code of Federal Regulation.
"Challenge test"
means a study conducted to
				  determine the removal efficiency (i.e. log removal value [LRV]) of a membrane
				  material for a particular organism, particulate or surrogate.
"Clean-in place (CIP)"
means the periodic
				  application of a chemical solution or series of solutions to a membrane unit
				  for the intended purpose of removing accumulated foulants and restoring
				  permeability and resistance to baseline levels, commonly used for in-situ
				  chemical cleaning.
"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 supply
				  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.
"Council"
means the Water Quality Management
				  Advisory Council.
"CT"
means the product of
"
residual
				  disinfectant concentration
"
(C) in mg/l, and the corresponding
"
disinfectant contact time
"
(T) in minutes, i.e.,
"
C
"
x
"
T
"
. CT requirements
				  for a variety of disinfectants and conditions appear in the EPA Guidance Manual
				  to the Surface Water Treatment Rule.
"CT Value"
means the product of disinfectant
				  residual and disinfectant CT. The required amount of CT needed is contained in
				  the EPA Guidance Manual to the Surface Water Treatment Rule.
"DEQ"
means the Oklahoma Department of
				  Environmental Quality.
"Design-build"
means a project delivery method
				  in which one entity works under a single contract with the project owner to
				  provide design and construction services.
"Design package"
means a submittal to DEQ for an
				  approvable design-build flexible construction permitting process. The number
				  and scope of design packages is defined and set in the approved engineering
				  report with the last design package encompassing the final and completed 100%
				  project design.
"Differential pressure"
means a pressure drop
				  across a membrane module or unit from the feed inlet to concentrate outlet, as
				  distinguished from transmembrane pressure (TMP), which represents the pressure
				  from across the membrane barrier.
"Direct integrity testing"
means a physical test
				  applied to a membrane unit in order to identify and/or isolate an integrity
				  breach.
"Director"
or
"Executive Director"
means the Executive Director of the Oklahoma Department of Environmental
				  Quality.
"Effective size"
means from a particle-size
				  distribution curve, it is the diameter where 10% of the material is finer.
"Element"
means a term used to describe an
				  encased spiral-wound membrane module and is synonymous with the terms module
				  and cartridge.
"Engineer"
means a professional engineer
				  licensed to practice engineering in Oklahoma.
"ETV"
means the EPA's Environmental Technical
				  Verification Program.
"EPA"
means the United States Environmental
				  Protection Agency.
"FDA"
means the United States Food and Drug
				  Administration.
"Flexible permitting process"
means construction
				  permitting for a design-build project that is approved to start construction
				  with multiple design packages, noting that an approved DEQ construction permit
				  is required before construction or modification of a public water supply system
				  begins. Construction is limited to the scope of the approved design
				  package(s).
"Flood Plain"
means the flood way and a zone of
				  floodwater storage where water moves slowly or is ponded, thus attenuating the
				  flood peak as the flood waters move downstream.
"Flood way"
means the part of the flood plain
				  considered to be the zone of highest hazard and the zone to be reserved for the
				  passage of larger floods.
"Flux"
means the throughput of a pressure-driven
				  membrane filtration system expressed in terms of flow per unit of membrane
				  area.
"GWUDI"
means groundwater under the direct
				  influence of surface water.
"Hydraulic analysis"
means the study of the
				  water system network, evaluating water flows within the distribution system
				  under prescribed conditions, such as peak hourly flow plus fire flow when
				  required. Hydraulic analysis includes consideration of all factors affecting
				  system energy losses.
"Indirect integrity monitoring"
means the
				  monitoring of an aspect of filtered water quality, such as turbidity, that is
				  indicative of the removal of particulate matter at a frequency of no less than
				  once every fifteen (15) minutes.
"Individual water system"
means a water system
				  serving only one single-family residence.
"Iron and manganese control"
means the treatment
				  process designed specifically for the treatment or removal of iron and
				  manganese.
"Membrane unit"
means a group of membrane
				  modules that share common valving which allows the unit to be isolated from the
				  rest of the system for the purpose of integrity testing or other maintenance,
				  synonymous with the terms rack, skid and train.
"Minor public water supply system"
means a water
				  system not included in the public water supply system definition. Minor public
				  water supply systems are regulated by OAC 252:624.
"Multi-family dwelling"
means a single structure
				  designed and suitable for use of several or many families.
"Municipal system"
means public water supply
				  distribution systems constructed, operated, and maintained by a municipality or
				  trust for the benefit of such municipality.
"mm"
means millimeter
"nm"
means nanometer.
"NSF"
means the National Sanitation
				  Foundation.
"OAC"
means the Oklahoma Administrative
				  Code.
" O.S."
means the Oklahoma Statutes.
"OWRB"
means the Oklahoma Water Resources
				  Board.
"Package treatment plant"
means plants that are
				  pre-manufactured used to treat water that do not meet conventional standards
				  for flocculation and sedimentation.
"Plan documents"
means reports, proposals,
				  preliminary plans, survey and basis of design data, general and detail
				  construction plans, profiles, specifications, and all other information
				  pertaining to water supply planning.
"Pitless unit"
means an assembly which extends
				  the upper end of the well casing to above grade to prevent the entrance of
				  contaminants into the well or potable water supply, to conduct water from the
				  well, to protect the water from freezing or extremes of temperature and to
				  provide fill access to the well and to parts within the well.
"psi"
means pounds per square inch.
"Public Water Supply (PWS) system"
means any
				  system providing water for human consumption through pipes or other constructed
				  conveyances, if such system has at least fifteen (15) service connections or
				  regularly serves an average of at least twenty-five (25) individuals daily at
				  least sixty (60) days per year, whether receiving payment for same or not.
				  Multi-family dwellings, mobile home parks, recreational vehicle (RV) parks, and
				  correctional facilities, which are constructed, inspected and maintained under
				  a State or locally approved plumbing code, purchase water from a permitted
				  water system, do not provide treatment, and do not resell water, are not
				  classified as a Public Water Supply system. The following are the categories of
				  Public Water Supply systems:
(A)
"Community water system"
means any PWS system that serves at least
				fifteen (15) service connections used by year-round residents or regularly
				serves at least twenty-five (25) year-round residents.
(B)
"Non-community water system"
means any PWS system that serves an average of at least twenty-five (25)
				individuals at least sixty (60) days per year but is neither a community water
				system nor a non-transient non-community water system.
(C)
"Non-transient non-community (NTNC)
				water system"
means any PWS system that is not a community water system
				and that regularly serves at least twenty-five (25) of the same persons over
				six (6) months per year.
"Purchase water system"
means any system, which
				  purchases all of its water through a master meter and provides that water to
				  the public.
"Reduced pressure zone, backflow preventer"
means a device designed to prevent backflow consisting of two spring loaded
				  check valves with an intermediate reduced pressure zone that drains to the
				  atmosphere by a relief valve, with a reduced pressure maintained in the
				  intermediate zone by means of a pressure differential valve.
"Reduction Equivalent Dose (RED)"
means the UV
				  dose derived by entering the log inactivation measured during full-scale
				  reactor testing into the UV dose-response curve that was derived through
				  collimated beam testing. RED values are always specific to the challenge
				  microorganism used during experimental testing and the validation test
				  conditions for full-scale reactor testing.
"Required Dose"
means the UV dose in units of
				  mJ/cm 
				  2 needed to achieve the target log
				  inactivation for the target pathogen.
"Residuals"
means the sludge generated by a
				  drinking water treatment facility.
"Rip rap"
means a permanent, erosion resistant
				  ground cover that consists of hard, sound durable stones, which average in
				  weight between thirty pounds (30 lbs.) to fifty pounds (50 lbs.), with no more
				  than twenty percent (20%) weighing less than twenty pounds (20 lbs).
"Rural water system"
means a water system
				  designed to provide domestic water service to an area having its major part
				  outside of an incorporated community. This system may be organized as a trust
				  authority, a rural water district, or non-profit water corporation.
"Silt density index (SDI)"
means the ASTM,
				  standard D 4189-95,
Standard Test Method for Silt Density Index of
				  Water.
Measurements are taken by filtering a water sample through a
				  0.45mm flat sheet filter with a 47mm diameter at a pressure of 30 psi. The time
				  required to collect two samples at 500 ml each is measured and the resulting
				  data is imputed into a formula.
"Solids contact unit"
means a combination rapid
				  mix, floc-aggregation, and upflow sedimentation basin constructed in either a
				  round or square configuration.
"Standard methods for the examination of water and
				  wastewater"
means the approval methods developed by the APHA, the AWWA
				  and the Water Environmental Federation. The current standard methods are
				  contained in the 20 
				  th Edition, published by the
				  AWWA.
"Sufficiency certification"
means to provide
				  assurance that the integrity and capacity of an existing system will not or
				  have not been compromised.
"Transmembrane pressure (TMP)"
means the
				  pressure drop across the membrane barrier.
"UL"
means the Underwriters Laboratory.
"Uniformity coefficient"
means from a
				  particle-size distribution curve it is, the ratio of the 60 percent grain size
				  to the 10 percent grain size.
" U.S.C."
means United States Code.
"UV"
means ultra violet.
"UV absorbance"
means a measure of the amount of
				  UV light that is absorbed by a substance at a specific wavelength, across a
				  specified pathlength of substance. This measurement accounts for absorption and
				  scattering in the medium. Standard Method 5910B details this measurement
				  method, however, for drinking water applications, samples need not be filtered
				  or adjusted for pH or longer pathlength cuvettes, 4 cm to 5 cm should be used
				  instead of 1 cm cuvette.
"UV dose"
means the UV energy per unit area
				  incident on a surface, typically reported in units of
				  mJ/cm2 or J/m2. The UV
				  dose received by a waterborne microorganism in a reactor vessel accounts for
				  the effects on UV intensity of the absorbance of the water, absorbance of the
				  quartz sleeves, reflection and refraction of light from the water surface and
				  reactor walls, and the germicidal effectiveness of the UV wavelengths
				  transmitted.
"UV dose distribution"
means the probability
				  distribution of UV doses that microorganisms receive in a flow-through UV
				  reactor, typically shown in a histogram.
"UV inactivation"
means a process by which a
				  microorganism is rendered unable to reproduce, thereby unable to infect a
				  host.
"UV intensity"
means the power passing through a
				  unit area perpendicular to the direction of propagation. UV intensity is used
				  in the UV Disinfection Guidance Manual (UVDGM) to describe the magnitude of UV
				  light measured by UV sensors in a reactor and with a radiometer in bench-scale
				  UV experiments.
"UV lamp sleeve"
means the quartz tube that
				  houses the UV lamp. The exterior of the lamp sleeve is in direct contact with
				  the water being treated. There is typically an air gap (approx. 1 cm) between
				  the lamp envelope and quartz sleeve.
"UV low-pressure lamp"
means a mercury-vapor
				  lamp that operated at an internal pressure of 0.13 to 1.3 Pa (2X10 to
				  2X10-4 psi) and electrical input 0.5 watts per
				  centimeter (W/cm). This results in essentially monochromatic light output at
				  254nm.
"UV low-pressure high-output lamp"
means a
				  low-pressure mercury-vapor lamp that operates under increased electrical input
				  (1.5 to 10 W/cm), resulting in a higher UV intensity than low-pressure lamps.
				  This results in essentially monochromatic light output at 254 nm.
"UV medium-pressure lamp"
means a mercury-vapor
				  lamp that operates at an internal pressure of 1.3 to 13,000 Pa (2 to 200 psi)
				  and electrical input of 50 to 150 W/cm. This results in a polychromatic (or
				  broad spectrum) output of UV and visible light at multiple wavelengths,
				  including wavelengths in the germicidal range.
"UV off-line chemical clean"
means a process to
				  clean lamp sleeves where the UV reactor is taken off-line and a cleaning
				  solution (typically weak acid) is sprayed into the reactor through a service
				  port.
"UV off specification"
means a UV facility that
				  is operating outside of the validated operating conditions (e.g. at a flow rate
				  higher than the validated range or UVT below the validated range).
"UV on-line mechanical clean"
means a process to
				  clean lamp sleeves where an automatic mechanical wiper (e.g. o-ring) wipes the
				  surface of the lamp sleeve at a prescribed frequency.
"UV on-line mechanical-chemical clean"
means a
				  process to clean lamp sleeves where an automatic mechanical wiper (e.g. o-ring)
				  with a chemical solution located within the cleaning mechanism wipes the
				  surface of the lamp sleeve at a prescribed frequency.
"UV sensor"
means a photosensitive detector used
				  to measure the UV intensity at a point within the UV reactor that converts the
				  signal to units of milliamps (mA).
"UV transmittance (UVT)"
means a measure of the
				  fraction of incident light transmitted through a material. The UV transmittance
				  is usually reported for a wavelength of 254 nm and a pathlength of 1 cm. If an
				  alternate pathlength is used, it shall be specified or converted to units of cm
				  
				  -1. UV transmittance is often
				  represented as a percentage and is related to the UV absorbance(A254) by the
				  following equation (for a 1 cm path length): % UV transmittance=100X10 
				  -A  where A is UV absorbance.
"Validated dose"
means the UV dose in units of
				  mJ/cm 
				  2 delivered by the UV reactor is
				  determined through validation testing. The validated dose is compared to the
				  required dose to determine log inactivation credit.
"Water line extension"
means an extension of an
				  existing permitted water distribution line.
"WEF"
means the Water Environmental Federation,
				  formerly known as the WPCF.
"Wholesale system"
means a public water supply
				  system that treats source water as necessary to produce finished water and then
				  delivers finished water to another public water supply system. Delivery may be
				  through a direct connection or through the distribution system of one or more
				  consecutive systems.
"WQA"
means the Water Quality
				  Association.
"WTP"
means Water Treatment
				  Plant.
Added at 18 Ok Reg 1612,
				  eff 6-1-01; Amended at 25 Ok Reg 2304, eff
				  7-11-08