The system
shall prepare and submit a corrosion control treatment feasibility study to the
Department by the applicable deadline established in paragraph (2). The purpose
of this study is to identify corrosion control priorities, evaluate viable
corrosion control approaches and select the optimal corrosion control
treatment. As a minimum, the system shall include the information required in a
basic study described in subparagraph (i). The Department may require a water
supplier to conduct demonstration testing if the Department determines that a
basic study is insufficient to determine optimal corrosion control treatment.
Demonstration testing may also be required when a system continues to exceed an
action level after corrosion control treatment has been installed.
(i) The basic study shall include the
following information:
(A) A sample site
location plan prepared in accordance with §
109.1103
(g).
(B) A summary of lead and copper and water
quality parameter monitoring results performed in accordance with §
109.1103. These results shall be
evaluated considering the location of sample sites within the distribution
system and used as the basis for considering corrosion control treatment
options.
(C) An evaluation of
source water contributions and the need for source water treatment.
(D) A desktop evaluation of alkalinity and pH
adjustment, calcium hardness adjustment and corrosion inhibitor addition or a
combination of these treatments. The evaluation shall include analyses based on
documented analogous treatments with other systems of similar size, water
chemistry and distribution system configuration. If source water treatment is
needed to achieve optimal corrosion control, the water supplier shall evaluate
the source water treatments specified in paragraph (4).
(E) An identification of chemical, physical
or regulatory constraints on the use of a particular corrosion control
treatment, such as its adverse effects on other treatment processes or the
ability of wastewater facilities to comply with applicable statutes or
regulations.
(F) A recommendation
of optimal corrosion control treatment, including source water treatment, if
applicable, for the system based on the supporting documentation specified in
clauses (A)-(E). When a system has multiple sources, it may be necessary for
the system to provide different corrosion control treatment for different
sources.
(G) Recommended water
quality parameter performance requirements for the selected corrosion control
treatment.
(H) A proposed schedule
for completion of the remaining corrosion control treatment compliance steps in
accordance with paragraph (2), including, but not limited to, treatment design
and permit application submittal, financing and construction, and initiation of
operation.
(ii) A
demonstration study shall include the evaluation of corrosion control
treatments using pipe rig/loop tests, metal coupon tests or partial system
tests.