Applicability. This rule applies to all public water systems
that use ground water except those that combine all of their ground water with
surface water or with ground water under the direct influence of surface water
prior to treatment under rule
3745-81-71 of the Administrative
Code. For the purpose of rules
3745-81-41 to
3745-81-45 of the Administrative
Code, "ground water system" is defined as any public water system meeting this
applicability statement, including consecutive systems receiving finished
ground water.
(A) Systems subject to
this rule shall comply with the following:
(1)
Inspection and response requirements for all ground water systems as described
in rule
3745-81-60 of the Administrative
Code.
(2) Microbial source water
monitoring requirements for ground water systems that do not treat all of their
ground water to at least
99.99 per cent (4-log) treatment
of viruses (using inactivation, removal, or a director-approved combination of
4-log virus inactivation and removal) before or at the first customer as
described in rule
3745-81-42 of the Administrative
Code.
(3) Treatment technique
requirements, described in rule
3745-81-61 of the Administrative
Code, that apply to ground water systems that have
fecally
E.coli
contaminated source waters as determined by source water monitoring conducted
under rule
3745-81-42 of the Administrative
Code, or that have significant deficiencies that are identified by the director
through the sanitary survey process, or through a level one or level two
assessment conducted in accordance with rule
3745-81-53 of the Administrative
Code. A ground water system with
fecally
E. coli contaminated source water or with
significant deficiencies subject to the treatment technique requirements of
this rule shall implement one or more of the following corrective action
options: correct all significant deficiencies; provide an alternate source of
water; eliminate the source of contamination; or provide treatment that
reliably achieves at least 4-log treatment of viruses (using inactivation,
removal, or a director-approved combination of 4-log virus inactivation and
removal) before or at the first customer.
(4) Ground water systems that provide at
least 4-log treatment of viruses (using inactivation, removal, or a
director-approved combination of 4-log virus inactivation and removal) before
or at the first customer are required to conduct compliance monitoring to
demonstrate treatment effectiveness, as described in rule
3745-81-43 of the Administrative
Code.
(5) If requested by the
director, ground water systems shall provide any existing information that will
enable the director to perform a hydrogeologic sensitivity
assessment.
Notes
Ohio Admin. Code
3745-81-41
Effective:
12/12/2022
Five Year Review (FYR) Dates:
8/17/2022 and
12/12/2027
Promulgated
Under: 119.03
Statutory
Authority: 6109.04
Rule
Amplifies: 6109.03,
6109.04
Prior
Effective Dates: 10/31/2010, 04/01/2016