Ohio Admin. Code 3745-81-88 - Control of lead and copper - monitoring requirements for lead and copper in source water at the entry point the distribution system
(A) Sampling point
locations, collection methods, and number of samples.
(1) A public water system that exceeds the
lead or copper action level on the basis of tap water samples collected in
accordance with rule
3745-81-86
of the Administrative Code shall monitor for lead and copper in source water at
the entry point to the distribution system in accordance with the following
requirements regarding sampling point locations, collection methods, and number
of samples:
(a) Ground water systems shall
take a minimum of one sample at every entry point to the distribution system
which is representative of each well after treatment (hereafter called a
sampling point). The public water system shall take one sample at the same
sampling point unless conditions make another sampling point more
representative of each source or treatment plant.
(b) Surface water systems shall take a
minimum of one sample at every entry point to the distribution system after any
application of treatment or in the distribution system at a point which is
representative of each source after treatment (hereafter called a sampling
point). The public water system shall take each sample at the same sampling
point unless conditions make another sampling point more representative of each
source or treatment plant. Note: For the purposes of this paragraph, surface
water systems include systems with a combination of surface and ground water
sources.
(c) If a public water
system draws water from more than one source and the sources are combined
before distribution, the public water system shall sample at an entry point to
the distribution system during periods of normal operating conditions, i.e.,
when water is representative of all sources being used.
(d) The director may reduce the total number
of samples which must be analyzed by allowing the use of compositing.
Compositing of samples mustshall be done by certified laboratory personnel.
Composite samples from a maximum of five samples are allowed, provided that if
the lead concentration in the composite sample is greater than or equal to
0.001 milligram per liter or the copper concentration is greater than or equal
to 0.160 milligram per liter, then either:
(i) A follow-up sample shall be taken and
analyzed within fourteen days at each sampling point included in the composite;
or
(ii) If duplicates of or
sufficient quantities from the original samples from each sampling point used
in the composite are available, the public water system may use these instead
of resampling.
(2) Where the results of monitoring indicate
an exceedance of maximum permissible levels in the source water at the entry
point to the distribution system established under paragraph (B)(4) of rule
3745-81-83
of the Administrative Code, the director may require that the public water
system monitor with one additional sample as soon as possible after the initial
monitoring(but not to exceed two weeks) at the same sampling point. If a
director-required confirmation sample is taken for lead or copper, then the
results of the initial and confirmation monitoring shall be averaged in
determining compliance with the director-specified maximum permissible levels.
Any sample value below the method detection limit (MDL) shall be considered to
be zero. Any lead value above the MDL but below the practical quantitation
level (PQL) of 0.005 milligram per liter shall be considered as the measured
value. Any copper value above the MDL but below the PQL of 0.050 milligram per
liter shall be considered as the measured value.
(B) Monitoring frequency after public water
system exceeds tap water action level. Any system which exceeds the lead or
copper action level at the tap shall monitor one sample from each source water
at the entry point to the distribution system no later than six months after
the end of the monitoring period during which the lead or copper action level
was exceeded. For monitoring periods that are annual or less frequent, the end
of the monitoring period is September thirtieth of the calendar year in which
the sampling occurs, or if the director established an alternate period, the
last day of that period.
(C)
Monitoring frequency after installation of source water treatment. Any public
water system which installs source water treatment pursuant to paragraph (A)(3)
of rule 745-81-83 of the Administrative Code shall collect an additional sample
from each source water at the entry point to the distribution system during
each of two consecutive six-month monitoring periods by the deadline specified
in paragraph (A)(4) of rule 745-81-83 of the Administrative Code.
(D) Monitoring frequency after the director
specifies maximum permissible lead and copper levels in source water at entry
points to the distribution system or determines that source water treatment is
not needed.
(1) A public water system shall
monitor at the frequency specified in paragraph (D)(1)(a) or (D)(1)(b) of this
rule in cases where the director specifies maximum permissible source water at
the entry point to the distribution system levels under paragraph (B)(4) of
rule
3745-81-83
of the Administrative Code or determines that the public water system is not
required to install source water treatment under paragraph (B)(2) of rule
745-81-83 of the Administrative Code.
(a) A
public water system using only ground water shall monitor once during the
three-year compliance period (as that term is defined in rule 745-81-01 of the
Administrative Code) in effect when the applicable director's determination
under paragraph (D)(1) of this rule is made. Such public water systems shall
monitor once during each subsequent compliance period. Triennial samples shall
be collected every third calendar year.
(b) A public water system using surface water
(or a combination of surface water and ground water) shall monitor once during
each year, the first annual monitoring period to begin during the year in which
the applicable director's determination is made under paragraph (D)(1) of this
rule.
(2) A public water
system is not required to conduct source water at the entry point to the
distribution system sampling for lead and/or copper if the system does not
exceed the action level for the specific contaminant in tap water samples at
any time during the sampling period applicable to the system under paragraph
(D)(1)(a) or (D)(1)(b) of this rule.
(E) Reduced monitoring frequency.
(1) A public water system using only ground
water may reduce the monitoring frequency for lead and copper in source water
at the entry point to the distribution system once during each nine-year
compliance cycle (as that term is defined in rule
3745-81-01
of the Administrative Code) provided that the samples are collected no later
than every ninth calendar year and if the system meets one of the following
criteria:
(a) The public water system
demonstrates that finished drinking water entering the distribution system has
been maintained below the maximum permissible lead and copper concentrations
specified by the director in paragraph (B)(4) of rule
3745-81-83
of the Administrative Code during at least three consecutive compliance periods
under paragraph (D)(1) of this rule; or
(b) The director has determined that source
water treatment is not needed and the system demonstrates that, during at least
three consecutive compliance periods in which sampling was conducted under
paragraph (D)(1) of this rule, the concentration of lead in source water at the
entry point to the distribution system was less than or equal to 0.005
milligram per liter and the concentration of copper was less than or equal to
0.65 milligram per liter.
(2) A public water system using surface water
(or a combination of surface water and ground water) may reduce the monitoring
frequency in paragraph (D)(1) of this rule to once during each nine-year
compliance cycle (as that term is defined in rule
3745-81-01
of the Administrative Code) provided that the samples are collected no later
than every ninth calendar year and if the system meets one of the following
criteria:
(a) The public water system
demonstrates that finished drinking water entering the distribution system has
been maintained below the maximum permissible lead and copper concentrations
specified by the director under paragraph (B) (4) of rule
3745-81-83 foratleastthreeconsecutiveyears; or
(b) The director has determined that source
water treatment is not needed and the public water system demonstrates that,
during at least three consecutive years, the concentration of lead in source
water at the entry point to the distribution system was less than or equal to
0.005 milligram per liter and the concentration of copper at the entry point
was less than or equal to 0.65 milligram per liter.
(3) A public water system that uses a new
source of water is not eligible for reduced monitoring for lead and/or copper
until concentrations in samples collected from the new source during three
consecutive monitoring periods are below the maximum permissible lead and
copper concentrations specified by the director under paragraph (A)(5) of rule
3745-81-83
of the Administrative Code.
Notes
Promulgated Under: 119.03
Statutory Authority: 6109.04
Rule Amplifies: 6109.04
Prior Effective Dates: 09/13/1993, 10/17/2003, 07/24/2009
Promulgated Under: 119.03
Statutory Authority: 6109.04
Rule Amplifies: 6109.03, 6109.04
Prior Effective Dates: 09/13/1993, 10/17/2003, 07/24/2009
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