Ohio Admin. Code 3745-83-02 - Water distribution system disruption of service
(A)
Definitions for this rule.
(1)
"Affected area"
means the portion of a distribution system where the pressure of the system has
dropped below twenty pounds per square inch (psig) at ground
level.
(2)
"Contamination intrusion" includes, but is not limited
to sewage, unintended chemical waste or other waste in the pit or pipe, or
muddy water or other unintended material entering the pipe.
(3)
"Positive
pressure" means any continuous outflow of water above zero psig at ground level
from the pipe on each side of the break.
(4)
"Special purpose
total coliform samples" or "special purpose samples," means those samples taken
to determine whether disinfection practices are sufficient following a
disruption of service event .
(5)
"Type 1" event
means a controlled pipe repair where positive pressure is continuously
maintained during the repair, and there are no signs of contamination
intrusion.
(6)
"Type 2" event means a controlled repair of a
distribution system component where positive pressure is maintained until a
controlled shutdown of the affected area can be completed, and there are no
signs of contamination intrusion.
(7)
"Type 3" event
means a disruption of service or water line repair where there is one or more
of the following: a loss of positive pressure at the repair site and localized
depressurization adjacent to the repair; an uncontrolled shutdown; or there are
signs of possible contamination intrusion.
(8)
"Type 4" event
means a catastrophic failure with widespread depressurization in the system or
actual contamination intrusion.
(9)
"Repair" means
any incident that requires the installation of pipe which does not exceed one
section of pipe or twenty feet when dealing with fusible pipe
material.
(10)
"Replacement" means any incident that requires
installation of pipe which exceeds one section of pipe or twenty feet when
dealing with fusible pipe material.
(B)
In the event a
public water system is unable to maintain a minimum pressure of twenty psig at
ground level at all points in the distribution system the incident shall be
deemed a disruption of service. Non-transient non-community systems with a
population less than one thousand people and all transient non-community
systems shall immediately provide bottled water or an equivalent remedy as
determined by the director or authorized representative until such time as
pressure is returned and E. coli samples are negative. Non-transient
non-community systems serving a population of at least one thousand people and
all community water systems shall comply with the following:
(1)
Monitoring.
(2)
Type 1 event response. During this type of event, a
boil advisory, sampling for total coliform and notification to the Ohio EPA are
not required if the following criteria are met:
(a)
The pit is
excavated to below the area to be repaired.
(b)
The water level
in the pit is maintained below the area to be repaired.
(c)
The line is
disinfected in accordance with American water works association (AWWA) standard
C651-14, section 4.11.3.1.
(d)
The line is
repaired under positive pressure.
(e)
After completion
of repair, test or verify disinfectant presence by either conducting a chlorine
residual analysis or comparing a 0.5 milligrams per liter (mg/L) free chlorine
standard to an appropriately sized sample with free chlorine reagent
added.
(f)
The public water system shall document activities and
events during the repair on a form approved by the director to demonstrate the
public water system followed the Type 1 event response as established in this
rule.
(g)
If the public water system does not complete the Type 1
event response in accordance with this rule, the incident is elevated to a Type
2 event and the public water system shall comply with the requirements of
paragraph (B)(3) of this rule.
(3)
Type 2 event
response. During this type of event, a boil advisory, sampling for total
coliform and notification to the Ohio EPA are not required if the following
criteria are met:
(a)
The pit is excavated to below the area to be
repaired.
(b)
The water level in the pit is maintained below the area
to be repaired.
(c)
Critical users, as established in the contingency plan
in accordance with rule
3745-85-01 of
the Administrative Code, within the affected area shall be notified, if
applicable, in accordance with the system's contingency plan as soon as
possible, but within twenty-four hours. Efforts should be made to notify
critical users in advance of beginning the repair.
(d)
A
controlled shutdown of the affected area is performed.
(e)
The line is
disinfected in accordance with AWWA standard C651-14 section
4.11.3.2.
(f)
In affected areas that are known or are likely to
contain lead service lines, public water systems shall follow the applicable
notification requirements of paragraph (B)(6) of this rule.
(g)
The water line is
repaired.
(h)
The water line flushed in accordance with AWWA standard
C651-14 section 4.11.3.2.
(i)
After repair, test or verify disinfectant presence by
either conducting a chlorine residual analysis or comparing a 0.5 mg/L free
chlorine standard to an appropriately sized sample with free chlorine reagent
added.
(j)
The public water system shall document activities and
events on a form approved by the director during the repair to demonstrate that
the public water system followed the Type 2 event response as established in
this rule.
(k)
If the public water system does not complete the Type 2
event response in accordance with this rule, the incident is elevated to a Type
3 event and the system shall comply with the requirements of paragraph (B)(4)
of this rule.
(4)
Type 3 event response. A public water system shall
comply with the following:
(a)
Activate the notification procedures in the public
water system's contingency plan.
(b)
If the disruption
affects greater than ten per cent of a public water system's customers or
greater than one hundred service connections, whichever is least, the public
water system shall notify the appropriate Ohio EPA district representative or
the Ohio EPA's environmental response hotline in accordance with rule
3745-85-01 of
the Administrative Code as soon as possible, but within twenty-four hours.
During this type of response, the public water system shall ensure that they
speak with a person. The use of email or voicemail will not satisfy this
notification requirement.
(c)
Document possible
contamination.
(d)
Issue a precautionary boil advisory or water use
advisory to all potentially affected consumers as soon as possible but no later
than twenty-four hours after the event.
(e)
In affected areas
that are known or are likely to contain lead service lines, public water
systems shall follow the applicable notification requirements of paragraph
(B)(6) of this rule.
(f)
Disinfect, repair, and flush in accordance with AWWA
standard C651-14 section 4.11. 3.3.
(g)
Test for chlorine
residual and comply with the minimum chlorine residual established in paragraph
(C)(1) of rule
3745-83-01
of the Administrative Code and the maximum residual disinfectant level (MRDL)
established in paragraph (C) of rule
3745-81-10
of the Administrative Code.
(h)
After repairs are
made, pressure has been restored to twenty psig or above and the chlorine
residual is within acceptable limits, the public water system shall collect
special purpose total coliform samples at locations representative of the
affected area in accordance with table 1 of this rule.
(i)
If any special
purpose sample is total coliform positive, consult with Ohio EPA and continue
sampling until total coliform is not detected in representative
samples.
(ii)
If no special purpose samples are positive for E. coli,
the boil advisory may be lifted.
(iii)
If any special
purpose sample is positive for E. coli, the event is to be considered an acute
risk to human health and the boil advisory shall remain in effect until the
public water system meets the requirements for removing the boil advisory
established in rule
3745-81-32 of
the Administrative Code.
(iv)
A public water system shall consult with Ohio EPA to
withdraw a water use advisory.
(i)
During the event,
document activities and events on a form approved by the director, to
demonstrate the Type 3 event response was followed. The form shall be submitted
to the district office in which the system is located within forty-eight hours
or next business day, whichever is later, of the disruption of service being
corrected.
(j)
If the Type 3 event is no longer localized to the area
adjacent to the repair, the incident is elevated to a Type 4 event and the
public water system shall comply with the requirements of paragraph (B)(5) of
this rule.
(5)
Type 4 event response. A public water system shall
comply with the following criteria during this type of event:
(a)
Activate the
notification process in the public water system's contingency plan.
(b)
If the
disruption affects greater than ten per cent of a public water system's
customers or greater than one hundred service connections, whichever is least,
the public water system shall notify the appropriate Ohio EPA district
representative or the Ohio EPA's environmental response hotline in accordance
with rule
3745-85-01 of
the Administrative Code as soon as possible, but within twenty-four hours.
During this type of response, the public water system shall ensure that they
speak with a person. The use of email or voicemail will not satisfy this
notification requirement.
(c)
Document actual
contamination.
(d)
After consultation with Ohio EPA, issue a boil advisory
or water use advisory to all customers in the affected area as soon as possible
but no later than twenty-four hours after the disruption of
service.
(e)
In affected areas that are known or are likely to
contain lead service lines, public water systems shall follow the applicable
notification requirements of paragraph (B)(6) of this rule.
(f)
Disinfect,
repair, and flush in accordance with AWWA standard C651-14 section
4.11.3.3.
(g)
Test for chlorine residual and comply with the minimum
chlorine residual established in paragraph (C)(1) of rule
3745-83-01
of the Administrative Code and the MRDL established in paragraph (C) of rule
3745-81-10
of the Administrative Code.
(h)
After repairs are
made, pressure has been restored to twenty psig or above, and the chlorine
residual is within acceptable limits, the public water system shall collect
special purpose total coliform samples at locations representative of the
affected area, in accordance with table 1 of this rule.
(i)
If any special
purpose samples are total coliform positive, consult with Ohio EPA and continue
sampling until total coliform is not detected in representative
samples.
(ii)
If no special purpose samples are positive for E. coli,
the boil advisory may be lifted.
(iii)
If any special
purpose sample is positive for E. coli, the event is to be considered an acute
risk to human health and the boil advisory shall remain in effect until the
public water system meets the requirements for removing the boil advisory
established in rule
3745-81-32 of
the Administrative Code.
(iv)
A public water system shall consult with Ohio EPA to
withdraw a water use advisory.
(i)
During the event,
document activities and events on a form approved by the director, to
demonstrate the Type 4 event response was followed. The form shall be submitted
to the district office in which the system is located within forty-eight hours
or next business day, whichever is later, of the disruption of service being
corrected.
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(6)
In affected areas
that are known or likely to contain lead service lines, that experience a
disruption of service event, public water systems shall provide public
notification as follows:
(a)
In areas where repairs are conducted in Type 2, 3 and 4
events, the public water system shall provide a notice acceptable to the
director.
(b)
In areas where replacement is conducted, the public
water system shall comply with provisions contained in rule
3745-81-84
of the Administrative Code.
Notes
Promulgated Under: 119.03
Statutory Authority: 6109.04
Rule Amplifies: 6109.04
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