18 AAC 80.360 - Use of noncentralized treatment devices
(a) The owner of a
community water system or non-transient non-community water system may use a
point-of-entry treatment device to meet the MCLs set under
18 AAC 80.300(b) (1) and
(2)(A) - (B), if the device meets the
requirements of this section.
(b)
The owner must obtain department approval to use a point-of-entry treatment
device. To seek approval, the owner must submit plans for the device. Before
deciding whether to approve those plans, the department will require adequate
certification of performance, field testing, and a sealed engineering design
review of a treatment device. The design and application of a device must
address the tendency for an increase in heterotrophic bacteria concentrations
in water treated with activated carbon. As conditions for its approval, the
department will require frequent back-washing, post-contactor disinfection, and
heterotrophic plate count monitoring to ensure that the microbiological safety
of the water is not compromised, if the department determines that those
conditions serve the interests of public health.
(c) The owner shall develop and obtain
department approval for a monitoring plan before installing the point-of-entry
treatment device as a means of achieving compliance. Under an approved plan,
each device must provide health protection equivalent to central water
treatment designed to treat the contaminant of interest. For purposes of this
subsection, a device provides equivalent health protection if the water would
meet all MCLs set under
18 AAC 80.300(b),
and would be of acceptable quality, similar to water distributed by a properly
operated and maintained central water treatment works.
(d) The operator shall properly operate and
maintain the point-of-entry treatment device. In addition to the monitoring
required under this chapter, the operator shall monitor the operation and
maintenance of the device, including physical measurements and observations
such as total flow treated and the mechanical condition of the treatment
device.
(e) Under an approved plan
for a point-of-entry treatment device, the owner shall ensure that the
treatment is effective and properly applied and that the microbiological safety
of the water is maintained. The owner may not use a point-of-entry treatment
device to achieve compliance with an MCL or treatment technique requirement for
a microbial contaminant.
(f) The
owner shall ensure that consumers are protected and shall install, maintain,
and adequately monitor a treatment device in each building connected to the
system. The department will require the owner to provide assurance that each
building is subject to treatment and monitoring, and that the rights of the
public water system's customer are conveyed with the title upon sale of the
building.
(g) The department will
require the owner of a community water system or non-transient non-community
water system to use point-of-entry devices to avoid an unreasonable risk to
health as a condition for granting an exemption under
18 AAC 80.375 from the
requirements for lead and copper under
40 C.F.R.
141.83 (Source Water Treatment Requirements)
or 40 C.F.R.
141.84 (Lead Service Line Replacement
Requirements), both adopted by reference in
18 AAC 80.010(a).
In requiring the use of a point-of-entry device under this subsection, the
department will allow only a device that does not cause increased corrosion of
lead- and copper-bearing materials located between the device and the tap that
could increase contaminant levels at the tap.
Notes
Authority:AS 46.03.020
AS 46.03.050
AS 46.03.070
AS 46.03.710
AS 46.03.720
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