(B) Except as provided in this paragraph, a
public water system may not use point-of-use or point-of-entry treatment
devices to achieve compliance with a MCL. A nontransient noncommunity public
water system may use a point-of-use or point-of-entry treatment device to
achieve compliance with the MCL for arsenic if the following conditions are
met:
(1) Point-of-use and point-of-entry
treatment devices shall be owned, controlled, and maintained by the public
water system, or by a person under contract with the public water system, to
ensure proper operation and maintenance and compliance with the arsenic maximum
contaminant level.
(2) Before any
new point-of-use or point-of-entry treatment devices are installed for
compliance with the arsenic MCL, or any existing point-of-use or point-of-entry
treatment devices are used for compliance with the arsenic MCL, the public
water system shall obtain approval of detail plans in accordance with Chapter
3745-91 of the Administrative Code. Chemical and microbiological analyses for
constituents that may affect the performance or maintenance of the proposed
point-of-entry or point-of-use device must be performed on water entering the
treatment device and reported in the detail plans. Results of samples collected
more than twelve months prior to plan submittal may not be accepted. Detail
plans shall include data from an acceptable demonstration study and a
monitoring plan which ensures that the treatment devices provide health
protection equivalent to that provided by central water treatment. "Equivalent"
means that the water would meet all primary drinking water regulations and
would be of acceptable quality similar to water distributed by a well operated
central treatment plant. Detail plans shall describe how the system design
shall ensure that water of increased corrosivity shall not be released to the
drinking water distribution system. The monitoring plan shall include at least
the following parts:
(a) Description of and
schedule for the recording of physical measurements and observations such as
total flow treated and mechanical condition of the treatment
equipment.
(b) An explanation of
how consumers will be educated as to which taps are suitable for
ingestion.
(c) The location of
treatment devices and sampling points, and the frequency of sample collection
for arsenic analysis. At least one treatment device (or a minimum of
twenty-five per cent of treatment devices) shall be sampled for arsenic each
quarter unless otherwise approved by the director. Each treatment device shall
be sampled at least once annually.
(d) A schedule to collect any additional data
required by the director to demonstrate consistency of treatment performance of
the point-of-use or point-of-entry treatment device.
(3) The public water system must apply
effective technology under a plan approved by the director. The microbiological
safety of the water must be maintained at all times.
(4) The design and application of any
point-of-entry or point-of-use treatment device shall consider the potential
for increase in bacteria concentrations in water treated with activated carbon.
It may be necessary to use frequent backwashing, post-contactor disinfection,
and bacteria monitoring to ensure the microbiological safety of the water is
not compromised.
(5) The public
water system shall ensure that all buildings connected to the system have
sufficient point-of-use or point-of-entry treatment devices that are properly
installed, maintained, and monitored such that all consumers will be protected.
Public water systems using point-of-use technology must install devices at
every tap where common practice is to obtain water for ingestion.
(6) All point-of-use and point-of-entry
treatment devices shall be equipped with mechanical warnings that automatically
alert consumers of operational problems.
(7) The point-of-entry or point-of-use
treatment device shall be certified by an accredited "American National
Standards Institute" (ANSI) certification program for drinking water treatment
units in accordance with one of the following "American National Standards
Institute/National Sanitation Foundation" (ANSI/NSF) standards: standard 58
"Reverse Osmosis Drinking Water Treatment Systems 58-2007 (October 22, 2007)";
standard 62 "Drinking Water Distillation Systems 62-2004 (March 16, 2004)"; or
standard 53 "Drinking Water Treatment Units-Health Effects 53-2007a (July 10,
2007)".
(8) Maintenance of the
treatment device shall occur according to manufacturers suggestions, or at an
interval determined during a demonstration period, whichever time period is
shorter.
(9)
Upon failure of the
The point-of-entry or point-of-use treatment
device, all repairs or replacements must be
completed as soon as practical, but no later than
fourteen days after the failure
operational at
all times to provide water that meets the arsenic standard at required
taps.
(10)
The
Upon failure of
the point-of-entry or point-of-use treatment device
, all repairs or replacements must be
operational at all times to provide water that meets
the arsenic standard at required taps
completed
as soon as practicable, but no later than fourteen days after failure.
(a) Under temporary circumstances during
required maintenance of the point-of-entry or point-of-use treatment device or
equipment failure, bottled water may be required to be provided as specified in
paragraph (A) of this rule for a period not to exceed fourteen days.
(b) At any time a point-of-use or
point-of-entry treatment device is not operating due to maintenance or failure
of the device, a notice shall be posted at any tap served by that device. The
notice shall inform consumers that the water from that tap is not suitable for
ingestion due to elevated arsenic concentration and direct them to alternative
taps or sources that are suitable for ingestion.
(11) Maintenance records of all treatment
devices must be maintained for three years and available for review during a
sanitary survey.
[Comment: This rule adopts the ANSI/NSF standards 53, 58, and
62 by reference. Copies may be obtained from "NSF International, 789 Dixboro
Road, P.O. Box 130140, Ann Arbor, MI 48113-0140, (734) 769-8010",
www.nsf.org. These documents are
available for review at the "Ohio EPA Lazarus Government Center, 50 West Town
Street, Suite 700, Columbus, OH 43215".]
[Comment: This rule references the ANSI accreditation program
for third party certification of drinking water units. A list of ANSI
accredited third party product certification programs may be obtained from the
"American National Standards Institute, 25 West 43rd Street, New York, NY
10036, (212) 642-4900" or www.ansi.org.]