reglab/statecodes huggingface dataset:
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.495 - Definitions

Current through June 11, 2024
As used in NAC 445A.495 to 445A.5405, inclusive, unless the
				  context otherwise requires:
1. The
				words and terms defined in NAC 445A.497 to 445A.516, inclusive, have the
				meanings ascribed to them in those sections; and
2. The words and terms defined in
				40
				C.F.R. §
										141.2, as adopted by reference
				in NAC 445A.4525, have the meanings ascribed to them in that section.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R126-05, 10-31-2005; R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.4957 - "Bin classification" defined

Current through June 11, 2024
"Bin classification" means a category number, ranging from 1
				  to 4, that specifies the required degree of
Cryptosporidium
treatment.
Added to NAC by
				  Environmental Comm'n by R194-08, eff. 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.4963 - "Composite correction program" defined

Current through June 11, 2024
"Composite correction program" means a program that
				  includes:
1. A comprehensive
				performance evaluation.
2.
				Comprehensive technical assistance.
Added to NAC by
				  Environmental Comm'n by R194-08, eff. 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.4965 - "Comprehensive performance evaluation" defined

Current through June 11, 2024
"Comprehensive performance evaluation" means a thorough
				  review and analysis of the performance-based capabilities and associated
				  administrative, operational and maintenance practices of a plant which is
				  conducted to identify factors that may adversely impact the capability of the
				  plant to achieve compliance with state and federal regulations.
Added to NAC by
				  Environmental Comm'n by R194-08, eff. 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.4967 - "Comprehensive technical assistance" defined

Current through June 11, 2024
"Comprehensive technical assistance" means the performance
				  improvement phase of a composite correction program which is implemented if the
				  results of a comprehensive performance evaluation indicate the potential to
				  improve performance.
Added to NAC by
				  Environmental Comm'n by R194-08, eff. 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.497 - "Concentration of residual disinfectant" defined

Current through June 11, 2024
Concentration of residual disinfectant" means the
				  concentration of disinfectant, measured in milligrams per liter, in a
				  representative sample of water.
Added to NAC by Bd. of
				  Health, eff. 11-29-90-Substituted in revision for NAC
				  445.2632
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.498 - "Concentration times time" defined

Current through June 11, 2024
"Concentration times time" means the product of the
				  concentration of residual disinfectant in milligrams per liter of water that is
				  determined before or at the point the water reaches the first customer served
				  in the system for distribution and the corresponding disinfectant contact time
				  in minutes.
Added to NAC by Bd. of
				  Health, eff. 11-29-90-Substituted in revision for NAC
				  445.2633
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.5065 - "Filtered system" defined

Current through June 11, 2024
"Filtered system" means a public water system that meets the
				  requirements of NAC 445A.521 and uses filtration as a method of treatment for
				  microbial contamination.
Added to NAC by
				  Environmental Comm'n by R194-08, eff. 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.508 - "Heterotrophic plate count" defined

Current through June 11, 2024
"Heterotrophic plate count" means the measurement of the
				  total number of viable bacteria which use organic material as their carbon
				  source in a sample of water.
Added to NAC by Bd. of
				  Health, eff. 11-29-90-Substituted in revision for NAC
				  445.2643
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.509 - "Level of turbidity" defined

Current through June 11, 2024
"Level of turbidity" means the value in units of
				  nephelometric turbidity obtained by measuring the turbidity of a representative
				  sample of water at a specified regular interval of time. If continuous
				  turbidity monitoring is used, the level of turbidity is the discrete turbidity
				  value at a given time.
Added to NAC by Bd. of
				  Health, eff. 11-29-90-Substituted in revision for NAC
				  445.2644
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.5095 - "Microbial toolbox" defined

Current through June 11, 2024
"Microbial toolbox" means a description of alternatives that
				  meet the requirements for
Cryptosporidium
treatment credit as
				  set forth in
				  40
				  C.F.R. §§
										141.715 to
				  141.720,
				  inclusive, as adopted by reference in NAC 445A.4525, which includes:
1. Source protection and
				management;
2.
				Prefiltration;
3. Treatment
				performance;
4. Additional
				filtration; and
5.
				Inactivation.
Added to NAC by
				  Environmental Comm'n by R194-08, eff. 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.510 - "Outbreak of waterborne disease" defined

Current through June 11, 2024
"Outbreak of waterborne disease" means the significant
				  occurrence of acute infectious illness, associated epidemiologically with the
				  ingestion of water from a public water system that has been determined by the
				  Division or the appropriate district board of health to be deficient in
				  treatment.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by Environmental Comm'n by R126-05,
				  10-31-2005
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.5135 - "Unfiltered system" defined

Current through June 11, 2024
"Unfiltered system" means a public water system that meets
				  the requirements of NAC 445A.525 and uses disinfection as its sole method of
				  treatment for microbial contamination.
Added to NAC by
				  Environmental Comm'n by R194-08, eff. 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.514 - "Unit of nephelometric turbidity" defined

Current through June 11, 2024
"Unit of nephelometric turbidity" means a measurement of the
				  turbidity of water as determined by the ratio of the intensity of light
				  scattered by the sample to the intensity of incident light, using
				  instrumentation and methods as described in
Standard Methods for the
				  Examination of Water and Wastewater
.
Added to NAC by Bd. of
				  Health, eff. 11-29-90-Substituted in revision for NAC
				  445.2649
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.516 - "Watershed" defined

Current through June 11, 2024
"Watershed" means the area contained in a basin of drainage
				  or a subbasin of drainage which is tributary to a point of diversion of a
				  supply of water.
Added to NAC by Bd. of
				  Health, eff. 11-29-90-Substituted in revision for NAC
				  445.2651
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.517 - Applicability

Current through June 11, 2024
The provisions of NAC 445A.495 to 445A.5405, inclusive, apply
				  to:
1. Any public water system using
				surface water or groundwater under the direct influence of surface water;
				and
2. Any supplier of water who
				owns, controls or operates such a public water system.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by Environmental Comm'n by R126-05, 10-31-2005;
				  R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.518 - Submission of plan for compliance with requirements; date for final compliance

Current through June 11, 2024
1. A supplier of
				water who is notified by the Division or the appropriate district board of
				health that the public water system is not meeting any of the requirements for
				treatment set forth in the federal regulations adopted pursuant to NAC
				445A.4525, 445A.520, 445A.521 or 445A.526 to 445A.540, inclusive, shall submit
				a detailed plan to the Division or the appropriate district board of health,
				not less than 120 days after the date of notification, containing a feasible
				timetable for bringing the system into compliance with these
				sections.
2. The date for final
				compliance must not be later than June 29, 1993, or 18 months after
				notification by the Division or the appropriate district board of health that
				groundwater is under the direct influence of surface water, whichever is later,
				unless an extension is granted by the Division or the appropriate district
				board of health.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R126-05, 10-31-2005
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.519 - Procedure for review of actions taken by Division; appeals

Current through June 11, 2024
1. A person who has reason to believe that an
				action taken by the Division pursuant to NAC 445A.495 to 445A.5405, inclusive,
				is incorrect or based on inadequate knowledge may, within 10 business days
				after receiving notice of the action, request an informal discussion with the
				employee responsible for the action and the immediate supervisor of the
				employee.
2. If the informal
				discussion does not resolve the problem, the aggrieved person may, within 10
				business days after the date scheduled for the informal discussion, submit a
				written request to the Division for an informal conference. The informal
				conference must be scheduled for a date, place and time mutually agreed upon by
				the aggrieved person and the Division, except that the informal conference must
				be held no later than 60 days after the date on which the Division received the
				written request.
3. The
				determination of the Division resulting from the informal conference cannot be
				appealed and is the final remedy available to the aggrieved person.
4. A person who is aggrieved by an action of
				the Division taken pursuant to NAC 445A.495 to 445A.5405, inclusive, relating
				to the denial of an application for or renewal of a permit or the suspension or
				revocation of a permit may appeal that action in accordance with the
				regulations of the Division after exhausting the informal procedures set forth
				in this section, except that the Division may waive the informal procedures, or
				any portion thereof, by giving written notice to the aggrieved
				person.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A 10-30-97; A by Environmental Comm'n by R126-05,
				  10-31-2005; R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.5195 - General requirements for monitoring quality of source water to determine bin classification

Current through June 11, 2024
1. Each supplier of
				water shall monitor the quality of the source water of the public system to
				determine the bin classification, in accordance with
				40 C.F.R. §§
										141.701 to
				141.707,
				inclusive, as adopted by reference in NAC 445A.4525, in the following manner:
(a) For a source which existed on or before
				July 1, 2008, the supplier shall monitor the quality of the source water
				pursuant to the parameters and schedule set forth in
				40 C.F.R. §
											141.701, as adopted by reference in NAC
				445A.4525.
(b) For a new source of
				water used after July 1, 2008, the supplier shall monitor the quality of the
				source water pursuant to the parameters prescribed in
				40 C.F.R. §
											141.701, as adopted by reference in NAC
				445A.4525, according to a schedule which is approved by the Division. The
				supplier shall:
(1) Submit the schedule at
				least 1 month before sampling; and
(2) Provide in the schedule for at least 12
				months of results from monitoring the quality of the source water before the
				approval of design and construction pursuant to NAC 445A.6669, unless the
				Division approves an alternate schedule.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.520 - General requirements for treatment

Current through June 11, 2024
1. Except as
				otherwise provided in this section, each supplier of water shall treat the
				water in accordance with NAC 445A.521, 445A.526 and 445A.5265, and
				40 C.F.R. §§
										141.70,
				141.76,
				141.170,
				141.500 to
				141.503,
				inclusive, and 141.700, as adopted by reference in NAC 445A.4525.
2. A supplier of water who meets the
				standards of performance set forth in this section and NAC 445A.521, 445A.526
				and 445A.5265 and meets the operating criteria set forth in NAC 445A.533 will
				be considered to be in compliance with the requirements of subsection
				1.
3. The Division or the
				appropriate district board of health may require a higher degree of treatment
				than required by subsection 1, depending on the degree of contamination within
				the source water.
4. The Commission
				will not grant a variance from the provisions of this section.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R126-05, 10-31-2005; R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.521 - Filtration: Methods of treatment

Current through June 11, 2024
1. Each supplier of
				water shall treat the water in accordance with
				40
				C.F.R. §§
										141.73,
				141.173,
				141.550
				to
				141.553,
				inclusive, and 141.711, as adopted by reference in NAC 445A.4525.
2. The Commission will not grant a variance
				from the provisions of this section.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R126-05, 10-31-2005; R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.522 - Filtration: Efficiencies for removal

Current through June 11, 2024
1. For the purposes
				of meeting the levels of treatment set forth in NAC 445A.520:
(a) Conventional filtration treatment is
				presumed to be capable of achieving at least 99.9 percent or 3-log removal of
Cryptosporidium
, 99.7 percent or 2.5 -log removal of
Giardia
lamblia
cysts and 99 percent or 2-log
				removal of viruses if the process is in compliance with the operating criteria
				set forth in NAC 445A.533 and the standards of performance set forth in NAC
				445A.521;
(b) Treatment by direct
				filtration is presumed capable of achieving at least 99.7 percent or 2.5 -log
				removal of
Cryptosporidium
, 99 percent or 2-log removal of
Giardia
lamblia
cysts and 90 percent or 1-log
				removal of viruses if the process is in compliance with the criteria and
				standards set forth in paragraph (a); and
(c) Treatment by diatomaceous earth
				filtration and slow sand filtration is presumed capable of achieving at least
				99.9 percent or 3-log removal of
Cryptosporidium
, 99 percent
				or 2-log removal of
Giardia
lamblia
cysts and
				90 percent or 1-log removal of viruses if the process is in compliance with the
				criteria and standards set forth in paragraph (a).
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.524 - Filtration: Use of alternative technology

Current through June 11, 2024
1. The use of
				an alternative filtration technology, including packaged treatment plants, may
				be approved by the Division or the appropriate district board of health if the
				following requirements are met:
(a) The
				supplier of water demonstrates that the technology proposed provides a minimum
				of 99 percent or 2-log removal of
Giardia
lamblia
cysts and 99 percent or 2-log removal of
Cryptosporidium
. The process must meet the standards of
				performance established in NAC 445A.521.
(b) An engineering report is submitted to the
				Division or the appropriate district board of health documenting the results of
				experiments done at pilot plants or tests completed on a full-scale
				installation that is treating water with similar characteristics and exposed to
				similar hazards as the water proposed for treatment.
(c) If the alternative filtration technology
				is used to meet greater removal efficiencies for
Cryptosporidium
than those specified in paragraph (a) and
				includes the use of bag filters, cartridge filters or membrane filtration, the
				supplier of water shall ensure that the filters are operated in accordance with
				40 C.F.R. §
											141.719(a) and (b), as
				adopted by reference in NAC 445A.4525.
If a supplier wishes to use bag filters, cartridge filters
				  or membrane filtration, additional information on obtaining approval to operate
				  with these technologies is outlined in the
Membrane Filtration Guidance
				  Manual
, 2005 edition, published by the United States Environmental
				  Protection Agency, document number EPA 815-R-06-009. A copy of the manual is
				  available, free of charge, at the Internet address
http://www.epa.gov/safewater/disinfection/lt2/pdfs/guide_lt2_membranefiltration_final.pdf
.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.525 - Filtration: Avoidance of requirements

Current through June 11, 2024
1. A supplier of
				water may apply to the Division to operate without installing a system for
				filtration. The Division may grant the request if the supplier of water, not
				later than December 30, 1991, or 18 months after notification by the Division
				or the appropriate district board of health that a groundwater system is under
				the direct influence of surface water, whichever is later, meets the
				requirements set forth in
				40 C.F.R. §§
										141.71,
				141.171,
				141.520,
				141.521
				and
				141.522,
				as adopted by reference in NAC 445A.4525. For the Division to determine the
				adequacy of a watershed control program for a system located at Lake Tahoe, the
				supplier of water must demonstrate that a level of protection which minimizes
				the potential for contamination by
Giardia
lamblia
cysts, viruses and
Cryptosporidium
is
				provided by the location of the intake structure and a watershed control
				program.
2. A supplier of water
				shall obtain raw samples of the source water to test for
Giardia
lamblia
cysts, viruses and
Cryptosporidium
before conducting any treatment on a schedule
				prescribed by the Division.
3. To
				avoid the requirements for filtration, a supplier of water must comply with the
				provisions set forth in
				40 C.F.R. §§
										141.74(b),
				141.75(a)
				and
				141.712,
				as adopted by reference in NAC 445A.4525. Additional information on obtaining
				approval to operate without filtration is outlined in the
Guidance
				Manual for Compliance with the Filtration and Disinfection Requirements for
				Public Water Systems Using Surface Water Sources
, 1991 edition,
				product code PB93-222933. This document is available at a cost of $124 from the
				National Technical Information Service, 5285 Port Royal Road, Springfield,
				Virginia 22161, or at the Internet address
http://www.ntis.gov
.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R126-05, 10-31-2005; R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.526 - Standards for disinfection

Current through June 11, 2024
1. Each supplier of
				water shall provide disinfection treatment in accordance with
				40
				C.F.R. §
										141.72, as adopted by reference
				in NAC 445A.4525, and the applicable inactivation components of the microbial
				toolbox pursuant to NAC 445A.5265.
2. If a supplier of water proposes to modify
				its disinfection practices, the supplier must first submit to the Division or
				the appropriate district board of health a disinfection profile and benchmark
				pursuant to
				40 C.F.R. §§
										141.172,
				141.530
				to
				141.544,
				inclusive, 141.708 and 141.709, as adopted by reference in NAC
				445A.4525.
3. The Commission will
				not grant a variance or an exemption from the provisions of this
				section.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R126-05, 10-31-2005; R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.5265 - Requirements for treatment of Cryptosporidium

Current through June 11, 2024
1. A
				supplier of water who is required to meet the requirements for treatment of
Cryptosporidium
contamination pursuant to subsection 4 of NAC
				445A.5195 shall implement the requirements of the applicable components of the
				microbial toolbox options in accordance with
				40 C.F.R. §§
										141.716 to
				141.720,
				inclusive, as adopted by reference in NAC 445A.4525. If a supplier of water
				wishes to use ultraviolet light to meet those requirements, additional
				information on obtaining approval to operate with ultraviolet light is outlined
				in the
Ultraviolet Disinfection Guidance Manual for the Final Long Term
				2 Enhanced Surface Water Treatment Rule
, 2006 edition, as published by
				the United States Environmental Protection Agency, document number EPA
				815-R-06-007. A copy of the manual is available, free of charge, at the
				Internet address
http://www.epa.gov/ogwdw/disinfection/lt2/pdfs/guide_lt2_uvguidance.pdf.
.
2. If a supplier of water wishes to receive
				treatment credits, in addition to the requirements of subsection 1, the
				supplier shall:
(a) If using the watershed
				control program component of the microbial toolbox, demonstrate before any
				treatment that the actions identified to reduce
Cryptosporidium
in the source water are capable of 0.5 -log
				reduction of
Cryptosporidium
in the source water by:
(1) Reducing the potential for contamination;
				or
(2) Physical removal.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.527 - Requirements for monitoring

Current through June 11, 2024
1. Except as
				otherwise provided in this section, each supplier of water shall, on or after
				June 29, 1993, or on the date the system for filtration is installed, whichever
				is later, meet the requirements set forth in
				40 C.F.R. §§
										141.74,
				141.174
				and
				141.560
				to
				141.564,
				inclusive, and the applicable components of the requirements for monitoring
				within the microbial toolbox set forth in
				40 C.F.R. §§
										141.716 to
				141.720,
				inclusive, as adopted by reference in NAC 445A.4525.
2. A supplier of water shall measure and
				record the parameters that are needed to determine compliance with the
				requirements for concentration times time, including, but not limited to:
(a) The temperature of the disinfected
				water;
(b) The pH of the
				disinfected water, if chlorine is used as a disinfectant;
(c) The disinfectant contact time;
				and
(d) The concentration of the
				residual disinfectant before or at the point the water reaches the first
				customer.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.529 - Submission of engineering report for system of treatment installed before November 29, 1990

Current through June 11, 2024
A supplier of water that has installed a system for treatment
				  before November 29, 1990, which does not consist of technologies pursuant to
				  which the supplier of water shall treat water in compliance with NAC 445A.521
				  or which was not designed to comply with the operating criteria in NAC 445A.531
				  and 445A.533, shall submit to the Division or the appropriate district board of
				  health an engineering report which demonstrates that the plant can be operated
				  to supply water meeting the requirements for performance contained in NAC
				  445A.521 and 445A.526. This report must include an analysis of the previous 12
				  months of operating data and any special studies conducted to test the
				  performance of the plant under conditions of adverse water quality.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R126-05, 10-31-2005
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.530 - Submission and approval of engineering report before construction or modification of facility; standards for design

Current through June 11, 2024
1. A
				supplier of water proposing to:
(a) Construct
				a new facility for filtration and disinfection; or
(b) Make additions to or modify significantly
				an existing facility for treatment,
must submit an engineering report to the Division or the
				  appropriate district board of health. The report must be approved by the
				  Division or the appropriate district board of health before the supplier begins
				  construction. The report must also describe how the facility will be designed
				  to ensure that it complies with this section and NAC 445A.531.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.531 - Inclusion of features for reliability in design and construction of plant

Current through June 11, 2024
The following features for reliability or alternatives
				  acceptable to the Division or the appropriate district board of health must be
				  included in the design and construction of any plant that treats surface water
				  or groundwater under the direct influence of surface water:
1. Alarm devices to indicate failures in the
				coagulation, filtration and disinfection processes. The alarm must notify the
				person designated by the public water system as responsible for taking
				corrective action and, if the facility is unmanned, have the capability to shut
				the plant down until corrective action can be taken.
2. Standby replacement equipment to ensure
				continuous operation and control of unit processes for coagulation, filtration
				and disinfection.
3. Multiple
				filter units to provide redundant capacity if filters are out of service for
				backwash or maintenance.
4.
				Multiple ultraviolet light reactors, if used to meet the requirements of NAC
				445A.520, to provide redundant capacity if a reactor is out of service for
				maintenance.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by Environmental Comm'n by R126-05, 10-31-2005;
				  R194-08, 10-27-2009
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.5315 - Comprehensive performance evaluations; comprehensive technical assistance

Current through June 11, 2024
1. A comprehensive performance evaluation
				must emphasize approaches that can be implemented without significant capital
				improvements and must consist of the following components, without limitation:
(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.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.532 - Certification of persons operating facility

Current through June 11, 2024
A supplier of water shall, not later than 6 months after
				  receiving notification from the Division that its public water system is using
				  surface water or groundwater under the direct influence of surface water,
				  ensure that the persons who operate the facility for treatment have received a
				  certificate to operate the facility as required by NAC 445A.6345.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by R088-00, 8-3-2001; A by Environmental Comm'n by
				  R129-05, 10-31-2005
NRS
					 445A.860,
					 445A.880
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.5335 - Composite correction program

Current through June 11, 2024
1. A composite
				correction program required pursuant to NAC 445A.533 must be performed by a
				person approved by the Division or the appropriate district board of
				health.
2. Each supplier of water
				required to perform a composite correction program shall implement
				recommendations identified by the composite correction program in accordance
				with a schedule approved by the Division or the appropriate district board of
				health.
3. Additional information
				on performing a composite correction program is outlined in the handbook
				entitled
Optimizing Water Treatment Plant Performance Using the
				Composite Correction Program
, 1998, published by the United States
				Environmental Protection Agency, document number EPA 625/6-91/027. A copy of
				the manual is available, free of charge, at the Internet address
http://nepis.epa.gov
.
Added to
				  NAC by Environmental Comm'n by R194-08, eff. 10-27-2009; A by
				  R118-14,
				  eff. 12/22/2014
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.534 - Equipment of facility for disinfection

Current through June 11, 2024
A facility for disinfection must be equipped with:
1. A reserve supply of chemicals.
2. An emergency plan to be put into effect if
				there is a failure in the disinfectant process. The object of the plan must be
				to prevent delivery to the distribution system of any water that has not been
				disinfected or that has been disinfected inadequately. The plan must be posted
				in the treatment plant or in any other place that is accessible to the operator
				of the plant.
3. If the facility
				includes ultraviolet light disinfection, equipment for measuring and recording
				the flow of each ultraviolet light reactor, unless otherwise justified by an
				engineer.
Added to NAC by Bd. of
				  Health, eff. 11-29-90; A by Environmental Comm'n by R194-08,
				  10-27-2009-Substituted in revision for NAC
				  445.2669
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.535 - Requirements for plan of operations

Current through June 11, 2024
1. A supplier of
				water shall submit a plan of operations for each facility that treats surface
				water or groundwater under the direct influence of surface water to the
				Division or the appropriate district board of health for review and approval.
				The plan must be designed to produce the optimal quality of water from the
				treatment process. The supplier shall operate the facility in accordance with
				the approved plan.
2. The plan must
				include a description of:
(a) The program for
				monitoring the performance of the treatment plant;
(b) The program for maintaining unit process
				equipment;
(c) The persons who
				operate the facility, including the number of the staff and the level of their
				training;
(d) The operation of each
				unit process;
(e) The procedures
				used in the laboratory, if applicable;
(f) The procedures used to determine chemical
				dose rates;
(g) The records of the
				facility;
(h) The procedure for
				responding to an emergency at the plant or involving the watershed;
(i) If the plant uses ultraviolet light, the
				procedure for use in the case of lamp breakage and a mercury spill;
				and
(j) Any other features that
				contribute to the reliable operation of the plant.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.536 - Maintenance of records

Current through June 11, 2024
1. Each supplier of
				water shall maintain accurate and complete records of the operation of each
				treatment plant using surface water or groundwater under the direct influence
				of surface water. The records must include:
(a) The results of all monitoring conducted
				in accordance with NAC 445A.527;
(b) The date of any maintenance or inspection
				of a filter and the results of the inspection, including any evaluation of a
				pressure filter required by subsection 8 of NAC 445A.533;
(c) The quantity of water produced;
(d) The hours of operation;
(e) The rates of flow at the plant;
(f) The rates of filtration;
(g) The rates of backwash; and
(h) The dates and description of failures of
				major equipment or unit processes and the action taken to correct these
				failures.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.537 - Submission of monthly reports and other reporting actions

Current through June 11, 2024
1. Each supplier of water shall submit to the
				Division or the appropriate district board of health, on or after June 29,
				1993, or on the date the system for filtration is installed, whichever is
				later, a monthly report on the operation of each facility not later than the
				10th day of the following month.
2.
				The monthly report must include:
(a) A
				written explanation of the cause of any violation of the standards of
				performance set forth in NAC 445A.521, 445A.526 and 445A.5265 and the operating
				criteria set forth in NAC 445A.533; and
(b) The information required by
				40 C.F.R. §§
											141.75,
				141.175,
				141.570
				and
				141.571
				and the applicable provisions of
				40 C.F.R. §
											141.721, as adopted by reference in NAC
				445A.4525.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.538 - Notification of certain events

Current through June 11, 2024
Each supplier of water shall:
1. Consult with the Division or the
				appropriate district board of health and provide public notification for a
				violation of a treatment technique requirement resulting from a single
				exceedance of the maximum allowable turbidity pursuant to
				40
				C.F.R. §
										141.203(b)(3)
				as identified in Appendix A to Subpart Q of 40 C.F.R. § 141, as adopted by
				reference in NAC 445A.4525.
2.
				Notify the Division or the appropriate district board of health by telephone as
				soon as possible, but not later than the end of the next business day,
				whenever:
(a) The combined filter effluent
				exceeds:
(1) One unit of nephelometric
				turbidity in a system using conventional or direct filtration treatment;
				or
(2) The maximum level of
				turbidity established by the Division or the appropriate district board of
				health for systems using alternative technologies.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.539 - Periodic performance of sanitary survey of watershed; report of survey

Current through June 11, 2024
1. Unless an alternate frequency is otherwise
				required to maintain a watershed control program to meet the requirements for
				filtration avoidance pursuant to NAC 445A.525 or the requirements to treat
Cryptosporidium
pursuant to NAC 445A.5265, a sanitary survey
				of the watershed of a public water system must be performed by a qualified
				professional engineer or other person approved by the Division or the
				appropriate district board of health at least once every 5 years.
2. A report of the survey, including:
(a) A physical and hydrogeological
				description of the watershed;
(b) A
				summary of the data compiled in monitoring the quality of the water;
(c) A description of activities and sources
				of contamination;
(d) A description
				of any significant changes that have occurred since the last survey which could
				affect the quality of the water;
(e) A description of the ability of the
				system to meet the requirements of NAC 445A.520, 445A.521, 445A.526 and
				445A.529 to 445A.540, inclusive; and
(f) Any recommendations for corrective
				actions,
must be submitted to the Division or the appropriate
				  district board of health not less than 60 days after the completion of the
				  survey.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Generally › Section 445A.540 - Requirements for notification of persons served by system

Current through June 11, 2024
1. A supplier of water shall notify persons
				served by the public water system:
(a) If he
				or she has not installed a system for filtration by June 29, 1993, and has not
				met the requirements of NAC 445A.525; or
(b) Whenever an outbreak of waterborne
				disease occurs.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.66632 - Request by engineer to use product not certified in accordance with Standard 61 adopted by reference

Current through June 11, 2024
If a product that is subject to certification pursuant to NAC
				  445A.65825 in accordance with
				  Standard 61, as adopted by reference in NAC
				  445A.6663, in order to be
				  determined to be compatible with drinking water is not available or if an
				  engineer believes that such a product is not the best choice for a particular
				  design, the engineer may submit a request to the Division or the appropriate
				  district board of health to use a product that is not certified in accordance
				  with Standard 61. The engineer must demonstrate in such request that:
1. The components of the product which come
				into contact with drinking water are certified in accordance with Standard 61;
				or
2. Use of the product will not
				conflict with the provisions of NAC
				445A.66615 and federal
				law.
Added to
				  NAC by Environmental Comm'n by
				  R049-18A,
				  eff. 8/30/2018
NRS
				  445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.54022 - Applicability

Current through June 11, 2024
The provisions of NAC 445A.54022 to 445A.5405, inclusive,
				  apply to any public water system that uses a source of groundwater that must be
				  treated to remove or blend a constituent that exceeds primary drinking water
				  maximum contaminant levels as adopted by reference in NAC 445A.4525 or the
				  secondary drinking water maximum contaminant levels specified in NAC
				  445A.455.
Added to NAC by
				  Environmental Comm'n by R126-05, eff. 10-31-2005
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.54024 - Prerequisites to commencement of project

Current through June 11, 2024
A public water system which relies on a source of groundwater
				  must, before commencing a water project to treat or blend groundwater:
1. Submit to the Division or to the
				appropriate district board of health, pursuant to NAC 445A.54026, a preliminary
				engineering report for review and preliminary approval;
2. Upon preliminary approval of the
				preliminary engineering report, submit to the Division or to the appropriate
				district board of health, with the appropriate fees, an application for
				approval of the water project to treat groundwater that complies with the
				requirements of NAC 445A.54028;
3.
				Obtain written approval from the Division or the appropriate district board of
				health for the water project to treat groundwater; and
4. Submit to the Division or the appropriate
				district board of health a copy of a manual of operations and maintenance for
				the facility to treat groundwater.
Added to NAC by
				  Environmental Comm'n by R126-05, eff. 10-31-2005
NRS
					 445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.54026 - Submission and review of preliminary engineering report before construction or modification of facility

Current through June 11, 2024
1. Except as
				otherwise provided in
				NRS
				445A.920, a public water system proposing to:
(a) Construct a new facility for treatment or
				blending of groundwater; or
(b)
				Make additions to or modify an existing facility to treat or blend groundwater,
must submit a preliminary engineering report to the Division
				  or to the appropriate district board of health. The report must be reviewed by
				  the Division or the appropriate district board of health before the supplier
				  begins design of a facility to treat or blend groundwater.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.54028 - Application for approval of facility

Current through June 11, 2024
An application for approval of a groundwater treatment or
				  blending facility must contain:
1.
				Complete plans for the treatment or blending facility, including, without
				limitation, the details of any improvements to be made and all work to be
				performed on-site.
2. Complete
				specifications to supplement the plans for the facility.
3. A design report that:
(a) Describes the basis for the selection and
				design of the water project;
(b)
				Provides the criteria for design, data and other pertinent information defining
				the water project; and
(c)
				Establishes the adequacy of the proposed water project to meet the needs of the
				public water system.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.5403 - Approval of project: Prerequisites; effective period; revocation

Current through June 11, 2024
1. The Division or the appropriate district
				board of health shall not approve a project for a facility to treat groundwater
				unless the application for approval of the water project demonstrates that the
				water project will comply with the applicable provisions of NAC
				445A.54022 to
				445A.5405, inclusive.
2. Work on a water project must commence not
				later than 1 year after the water project is approved. The water project must
				be completed not later than 1 year after the date that work on the water
				project has commenced, except that the Division or the appropriate district
				board of health may extend this period in 1 year increments if:
(a) Work is being performed on the water
				project; and
(b) The Division or
				the appropriate district board of health receives a schedule of work and
				periodic updates on the progress of the water project.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.54032 - Preparation by engineer of plans, specifications and design reports for facility

Current through June 11, 2024
In accordance with the provisions of NAC
				  625.610 to
				  625.613, inclusive:
1. All initial and final plans,
				specifications and design reports for a facility to treat groundwater must be
				prepared by, or under the direct supervision of, an engineer; and
2. The engineer shall add his or her
				signature, the applicable date and his or her seal or stamp to the plans,
				specifications and design reports prepared pursuant to subsection 1.
Added to NAC by
				  Environmental Comm'n by R126-05, eff. 10-31-2005; A by
				  R050-20A,
				  eff. 8/26/2020
NRS
				  445A.860
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.54034 - Design of facility to be based upon pilot plant study; approval of treatment technology without pilot study

Current through June 11, 2024
1. Except as
				otherwise provided in subsection 2, the design of a groundwater treatment
				facility must be based upon a pilot plant study. The pilot plant study must
				identify:
(a) Hydraulic characteristics such
				as the optimum process loading rate or the proper blending rates; and
(b) The unit process performance such as the
				optimum chemical feed and the most effective chemicals to use for adequate
				removal.
Nevada Administrative Code › Chapter 445A - Water Controls › PUBLIC WATER SYSTEMS › Treatment of Water: Groundwater › Section 445A.54036 - Requirements for design of new facility

Current through June 11, 2024
1. The design
				for a new facility to treat groundwater must:
(a) Be free of structural and sanitary
				hazards.
(b) Provide for protection
				against pollution and contamination by backflow.
(c) Provide equipment for measuring and
				recording flow.
(d) Be designed to
				mitigate the effects of events such as earthquakes, fires, floods, freezing and
				sabotage that are reasonably foreseeable.
(e) Provide access for inspection,
				maintenance and monitoring of all unit processes.
(f) Provide, if required by the selected
				treatment process, for a coagulation process that includes rapid chemical
				mixing and is based on pilot plant or laboratory scale or equivalent results
				that demonstrate the effectiveness of the coagulant chemicals over the full
				range of water quality conditions expected.
(g) Provide, if filtration is required:
(1) For filter-to-waste for each filter
				unit;
(2) Backwash rates and
				facilities for surface or subsurface wash using air, water or a combination of
				these to clean the filter; and
(3)
				Treatment for the removal of solids from filter backwash water if the water is
				recycled into the treatment process. Recycled backwash water must be returned
				to the headworks of the treatment plant.
(h) Provide equipment for disinfection which
				is of proper size for the full range of expected conditions of flow and which
				is capable of automatic feeding accurately at all rates of flow.
(i) Provide for operation of the treatment
				plant without frequent shutdowns and start-ups.