(A) Following
completion of the initial round of source water monitoring required by
paragraph (A) of rule
3745-81-65
of the Administrative Code, systems shall calculate an initial Cryptosporidium
bin concentration for each plant for which monitoring was required. Calculation
of the bin concentration shall use the Cryptosporidium results reported under
paragraph (A) of rule
3745-81-65
of the Administrative Code and shall use the following procedures
.
:
(1) For systems that collect a total of at
least forty-eight samples, the bin concentration is equal to the arithmetic
mean of all sample concentrations.
(2) For systems that collect a total of at
least twenty-four samples, but not more than
47
forty-seven
samples, the bin concentration is equal to the highest arithmetic mean of all
sample concentrations in any twelve consecutive months during which
Cryptosporidium samples were collected.
(3) For systems that serve less than ten
thousand people and monitor for Cryptosporidium for only one year (i.e.,
collect twenty-four samples in twelve months), the bin concentration is equal
to the arithmetic mean of all sample concentrations.
(4) For systems with plants operating only
part of the year that monitor less than twelve months per year in accordance
with paragraph (E) of rule
3745-81-65
of the Administrative Code, the bin concentration is equal to the highest
arithmetic mean of all sample concentrations during any year of Cryptosporidium
monitoring.
(5) If the monthly
Cryptosporidium sampling frequency varies, systems shall first calculate a
monthly average for each month of monitoring. Systems shall then use these
monthly average concentrations, rather than individual sample concentrations,
in the applicable calculation for bin classification in paragraphs (A)(1) to
(A)(4) of this rule.
(B)
Systems shall determine their initial bin classification from the following
table and using the Cryptosporidium bin concentration calculated under
paragraphs (A)(1) to (A)(5) of this rule:
Bin Classification Table for
Systems
|
For systems that
are:
|
With a Crypotosporidium bin 1
concentration of:
|
The bin classification
is:
|
|
... required to monitor for
[Cryptosporidium] as specified in paragraphs (A) to (H) of rule
3745-81-65
of the Administrative Code.
|
Cryptosporidium < 0.075
oocyst/L
|
Bin 1.
|
|
0.075 oocysts/L <
=Cryptosporidium, < 1.0 oocysts/L
|
Bin 2.
|
|
1.0 oocysts/L < =
Cryptosporidium, < 3.0 oocysts/L
|
Bin 3.
|
|
Cryptosporidium > = 3.0
oocysts/L
|
Bin 4.
|
|
... serving less than 10,000
people and NOT required to monitor for Cryptosporidium under paragraph (A)(4)
of rule
3745-81-65
of the Adminstrative Code.
|
Not
applicable
|
Bin 1.
|
1
Based on calculations in paragraph (A) or (C) of this rule, as
applicable.
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Systems shall report their initial bin classification to the
director for approval no later than six months after the system is required to
complete initial source water monitoring based on the schedule in paragraph (C)
of rule
3745-81-65
of the Administrative Code. The bin classification report to the director shall
include a summary of source water monitoring data and the calculation procedure
used to determine bin classification.
For systems serving less than one hundred thousand within
twelve months after the system is required to complete initial source water
monitoring, the system shall submit a general plan to the director indicating
the system's plan for complying with any additional Cryptosporidium
inactivation and/or
or removal requirements. Systems serving at least one
hundred thousand people shall submit a general plan by March 1, 2010. The
general plan shall include at a minimum, a description of each toolbox option
which may be used, and a schedule for submitting any required detail plans
and/or
or
protocols/pilot study results for the proposed toolbox option. The general plan
shall be prepared and submitted by a professional engineer.
(C) Following completion of the second round
of source water monitoring required in accordance with paragraph (B) of rule
3745-81-65
of the Administrative Code, systems shall recalculate their Cryptosporidium bin
concentration using the Cryptosporidium results reported in accordance with
paragraph (B) of rule
3745-81-65
of the Administrative Code and following the procedures in paragraphs (A)(1) to
(A)(4) of this rule. Systems shall then re-determine their bin classification
using this bin concentration and the table in paragraph (B) of this rule.
Systems shall report their bin classification to the director for approval no
later than six months after the system is required to complete the second round
of source water monitoring based on the schedule in paragraph (C) of rule
3745-81-65
of the Administrative Code. The bin classification report to the director shall
include a summary of source water monitoring data and the calculation procedure
used to determine bin classification.
Within six months of receiving the director's approval of the
bin classification, the system shall submit a general plan to the director
indicating the system's plan for complying with any additional Cryptosporidium
inactivation and/or
or removal requirements. The general plan shall
include at a minimum, a description of each toolbox option which may be used,
and a schedule for submitting any required detail plans
and/or
or
protocols/pilot study results for the proposed toolbox option.
(D) Failure to comply with the
reporting requirements in paragraphs (B) and (C) of this rule
with exception of the requirement to submit a general
plan is a violation of the treatment technique requirement.
(E) Additional Cryptosporidium treatment
requirements based on bin classification.
(1)
Systems shall provide the level of additional treatment for Cryptosporidium
specified in this paragraph based on their bin classification as determined in
accordance with paragraphs (A) to (D) of this rule and according to the
schedule in paragraph (F) of this rule.
Additional Cryptosporidium treatment
requirements based on bin classification.
|
If the system bin
classification is...
|
And the system uses the
following filtration treatment in full compliance with rules
3745-81-71
to
3745-81-76
of the Administrative Code (as applicable), then the additional Cryptosporidium
treatment requirements are...
|
|
Conventional filtration
treatment (including softening)
|
Direct
filtration
|
Slow sand or diatmaceous earth
filtration
|
Alternative filtration
technologies
|
|
Bin 1
|
No additional
treatment
|
No additional
treatment
|
No additional
treatment
|
No additional
treatment
|
|
Bin 2
|
1-log
treatment
|
1.5 -log
treatment
|
1-log
treatment
|
As determined by the director
such that the total Cryptosporidium removal and inactivation is at least 4.0
-log.
|
|
Bin 3
|
2-log
treatment
|
2.5 -log
treatment
|
2-log
treatment
|
As determined by the director
such that the total Cryptosporidium removal and inactivation is at least 5.0
-log.
|
|
Bin 4
|
2.5 - log
treatment
|
3-log
treatment
|
2.5 -log
treatment
|
As determined by the director
such that the total Cryptosporidium removal and inactivation is at least 5.5
-log.
|
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(2)
Systems shall use one or more of the treatment and management options listed in
paragraph (A) of rule
3745-81-68
of the Administrative Code, termed the microbial toolbox, to comply with the
additional Cryptosporidium treatment required in paragraph (E)(1) of this
rule.
(3) Systems classified in Bin
3 and Bin 4 shall achieve at least 1-log of the additional Cryptosporidium
treatment required under paragraph (E)(1) of this rule using either one or a
combination of the following: bag filters, bank filtration, cartridge filters,
chlorine dioxide, membranes, ozone, or UV, as described in paragraphs (B) to
(N) of rule
3745-81-68
of the Administrative Code.
(4)
Failure by a system in any month to achieve treatment credit by meeting
criteria in paragraphs (B) to (N) of rule
3745-81-68
of the Administrative Code for microbial toolbox options that is at least equal
to the level of treatment required in paragraph (E)(1) of this rule is a
violation of the treatment technique requirement.
(5) If the director determines during a
sanitary survey or an equivalent source water assessment that after a system
completed the monitoring conducted in accordance with paragraphs (A) or (B) of
rule
3745-81-65
of the Administrative Code, significant changes occurred in the system's
watershed that could lead to increased contamination of the source water by
Cryptosporidium, the system shall take actions specified by the director to
address the contamination. These actions may include additional source water
monitoring and/or implementing microbial toolbox options listed in paragraph
(A) of rule
3745-81-68
of the Administrative Code.
(F) Schedule for compliance with
Cryptosporidium treatment requirements.
(1)
After the initial bin classification is determined, systems shall provide the
level of treatment for Cryptosporidium required by paragraph (E) of this rule
in accordance with the following schedule:
Cryptosporidium Treatment Compliance
Dates Table
|
Systems that
serve:
|
Shall comply with
Cryptosporidium treatment requirements no later than... *
|
|
(1) At least 100,000
people.
|
(1) April 1,
2012
|
|
(2) From 50,000 to 99,999
people.
|
(2) October 1,
2012
|
|
(3) From 10,000 to 49,999
people.
|
(3) October 1,
2013
|
|
(4) Fewer than
10,000.
|
(4) October 1,
2014
|
|
* Systems with a bin
classification of Bin 3 or Bin 4 shall have an additional two years for
complying with the treatment requirement if capital improvements will be made.
The director may allow up to an additional two years for complying with the
treatment requirement for systems in Bin 2 if capital improvements will be
made.
|
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(2)
If the bin classification for a system changes following the second round of
source water monitoring, as determined in accordance with paragraph (C) of this
rule, the system shall provide the level of treatment for Cryptosporidium
required in accordance with paragraph (E) of this rule on a schedule the
director approves.
