Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 631 - Public Water Supply Operation › Subchapter 1 - Introduction › Section 252:631-1-2 - Definitions

Current through Vol. 41, No. 20, July 1, 2024
In addition to terms defined in Title 27A of the Oklahoma
				  Statutes, the following words or terms, when used in this Chapter, shall have
				  the following meaning unless the context clearly indicates otherwise:
"Accredited laboratory"
means a laboratory
				  accredited through the DEQ laboratory accreditation program.
"AWWA"
means the American Water Works
				  Association.
"Direct Integrity Test"
means a physical test
				  applied to a membrane unit in order to identify and isolate integrity
				  breaches.
"DEQ"
means the Oklahoma Department of
				  Environmental Quality.
"Disinfection"
means a process that inactivates
				  pathogenic organisms in water by chemical oxidants or equivalent agents.
"EPA"
means the Environmental Protection
				  Agency.
"Groundwater under the direct influence of surface
				  water"
means any water beneath the surface of the ground with
				  significant occurrence of insects or other macroorgan-isms, 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 that
				  closely correlate to climatological or surface water conditions.
"Indirect Integrity Monitoring"
means monitoring
				  some aspect of membrane filtrate water quality that is indicative of the
				  removal of particulate matter.
"Laboratory checks"
means chemical,
				  radiochemical, physical, bacteriological, and microbiological tests made in a
				  laboratory approved by the DEQ, on water samples submitted to confirm the
				  quality of the water.
"Maximum contaminant level (MCL)"
means the
				  maximum permissible level of a contaminant in a Public Water Supply system that
				  has been determined to be necessary to safeguard the public health as specified
				  in these regulations.
"Maximum residual disinfectant level (MRDL)"
means the level of a disinfectant added for water treatment that may not be
				  exceeded at the consumer's tap without an unacceptable possibility of adverse
				  health effects.
"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.
"OAC"
means Oklahoma Administrative Code.
"Operating records and reports"
means the daily
				  record of data connected with the operation of the system compiled in a monthly
				  report.
"OWRB"
means the Oklahoma Water Resources
				  Board.
"Point of connection (POC)"
means the point at
				  which a consecutive system receives water from the wholesale system. This is
				  not the same as a "point of entry."
"Point of entry (POE)"
means the point at which
				  a source or combination of sources enters the distribution system.
"Primary Drinking Water Standards"
means the
				  maximum levels of contaminants as listed in 40 CFR Part 141 which are limited
				  in drinking water in order to protect public health.
"Protected groundwater free of sanitary defects"
means a ground water source that is properly designed and permitted, practices
				  full-time chlorination, and is properly operated and maintained as evidenced by
				  no critical deficiencies on inspections.
"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, manufactured home communities, 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.
"Residual disinfectant concentration"
means the
				  concentration of disinfectant measured in milligrams per liter (mg/l) in a
				  representative sample of water.
"Secondary standard"
means a non-mandatory
				  guideline that has been determined to be desirable to provide acceptable
				  drinking water.
"Slow sand filtration"
means a process involving
				  passage of raw water through a bed of sand at low velocity (generally less than
				  50 gallons/sq.ft./day) resulting in substantial particulate removal by physical
				  and biological mechanisms.
"Source"
means any lake, stream, spring or
				  groundwater supply that is used as treated or untreated water for a PWS
				  system.
"Total coliform positive sample"
means a sample
				  in which one or more coliform organisms are found.
"Treatment technique"
means the practice of a
				  PWS system to properly remove pathogens and total organic carbon.
"Turbidity"
means the amount of suspended
				  material in water as measured by Nephelometric Turbidity Units (NTU).
"Water Treatment"
means the act of removing
				  contaminants from source water or adjusting water quality by the addition of
				  chemicals, filtration, and other processes, thereby making the water safe for
				  human consumption.
Added at 17 Ok Reg 1987,
				  eff 6-12-00; Amended at 20 Ok Reg 61, eff 10-31-02 (emergency); Amended at 20
				  Ok Reg 1153, eff 6-1-03; Amended at 25 Ok Reg 2305, eff
				  7-11-08