Ohio Administrative Code › Title 3745 - Ohio Environmental Protection Agency › Chapter 3745-83 - Operational Requirements › Section 3745-83-01 - Operational requirements

Current through all regulations passed and filed through July 1, 2024
(A) Except as otherwise noted, the
			 definitions in rule
			 3745-81-01
			 of the Administrative Code shall apply to this chapter. For the purposes of this rule, "week" means a seven day
			 period beginning on Sunday and ending on the following
			 Saturday.
(B) Except as
			 otherwise noted, analyses required by this rule shall be conducted in
			 accordance with methods as specified in rule
			 3745-81-27
			 of the Administrative Code. In addition, analysis for parameters listed in the
			 table in this paragraph shall be conducted in a laboratory certified in
			 accordance with Chapter 3745-89 of the Administrative Code:
Parameter
Application
Total alkalinity
Precipitative softening or membrane technology; daily
						  monitoring.
Phenol alkalinity
Precipitative softening; daily monitoring.
Stability
Precipitative softening or membrane technology; weekly
						  monitoring.
Copper
All.
Fluoride
All.
Iron
For split sample or weekly analysis.
Manganese
For split sample or weekly analysis.
pH
Precipitative softening or membrane technology; daily
						  monitoring. Surface water treatment plant; daily monitoring.
Total hardness
Precipitative softening or membrane technology; daily
						  monitoring.
Total phosphorus
All.
(C)
			 Disinfection.
(1) Except as prescribed in rule
			 3745-81-72
			 of the Administrative Code, noncommunity public water systems serving a
			 population of at least one thousand people and all community public water
			 systems shall maintain a minimum chlorine residual of at least two-tenths
			 milligram per liter  (0.2 mg/L) free chlorine, or
			 one milligram per liter combined chlorine measured at representative points
			 throughout the distribution system. All other noncommunity public water systems
			 that provide water treated with chlorine for disinfection purposes shall
			 maintain the chlorine residual levels as described in this rule. The director
			 may require higher residuals as necessary to compensate for pH, temperature, or
			 other characteristics of the delivered water.
[Comment: Rule
				3745-81-72
				of the Administrative Code establishes similar but separate requirements for
				disinfection of systems using a surface water source. These two requirements
				are not inconsistent and failure to comply with either is considered a separate
				violation with different consequences. Contact your district office
				representative if you have questions or require clarification.]
(2) Noncommunity public water
			 systems serving a population of at least one thousand people and all community
			 public water systems shall install and place in operation equipment capable of
			 meeting disinfection requirements of this rule.
(3) A system is exempt from maintaining a
			 chlorine residual as required in paragraph (C)(1) of this rule if, with written
			 approval of the director, it uses chlorine dioxide as a primary disinfectant in
			 accordance with the terms of the approval.
[Comment: Plan approval requirements
				for a system treating with chlorine dioxide will include minimum chlorine
				dioxide residual requirements for the system and any consecutive
				systems.]
(4) At
			 times of actual or threatened outbreak of waterborne disease as defined in rule
			 3745-81-01
			 of the Administrative Code, or water supply emergency as determined by the
			 director in accordance with section
			 6109.05
			 of the Revised Code, the director may require a public water system subject to
			 paragraph (C) (1) of this rule to maintain a minimum chlorine residual of at
			 least one milligram per liter free chlorine, or six milligrams per liter
			 combined chlorine measured at representative points throughout the distribution
			 system, despite possible resulting tastes or odors in the delivered
			 water.
(5)
									
			 Finished water storage facilities serving noncommunity water systems serving a
			 population of at least one thousand people and all community water systems,
			 prior to being placed into service or being returned to service after repairs,
			 inspections, painting, cleaning, or other activities that might lead to
			 contamination, shall complete the following:
(a) Meet the requirements of "American Water
			 Works Association Standard C652-02 Disinfection of Water-Storage Facilities"
			 (2019).
(b) Be monitored for chlorine residual and
			 comply with the minimum chlorine residual established in paragraph (C)(1) of
			 this rule and the MRDL established in paragraph (C) of rule
			 3745-81-10
			 of the Administrative Code.
(6) Water mains serving noncommunity water
			 systems serving a population of at least one thousand people and all community
			 water systems, prior to being placed into service or being returned to service
			 after repairs, inspections, or other activities that might lead to
			 contamination, unless a minimum pressure of twenty pounds per square inch gauge
			 at ground level is maintained at all points in the distribution system, shall
			 complete the following:
(a) Meet the
			 requirements of "American Water Works Association Standard C651-14 Disinfecting
			 Water Mains" (2014).
(b) Be
			 monitored for chlorine residual and comply with the minimum chlorine residual
			 established in paragraph (C)(1) of this rule and the MRDL established in
			 paragraph (C) of rule
			 3745-81-10
			 of the Administrative Code.