Current through Register No. 13, March 27, 2025
(a)
Where a water supply source is adversely impacted as identified in Env-Wq
403.25, the permittee shall develop a program for providing an alternative
water supply to each user of the source in accordance with (b) through (i),
below.
(b) The permittee shall
supply, to each user of the adversely-impacted source, a quantity of water
equivalent to that which was available prior to the withdrawal.
(c) The user of the adversely-impacted source
shall not be charged for any of the initial capital costs of being provided
with an alternative water supply, including but not limited to the following:
(1) Water source development, including:
a. Hydrogeologic investigation, including
test well drilling as appropriate; and
(2) Water treatment equipment;
(4) Water storage facility;
(5) Water distribution system;
(6) Customer connection to the
system;
(7) All costs associated
with engineering in developing the water system, including but not limited to:
a. Design engineering; and
b. Field engineering including the
verification of quality workmanship;
(8) All legal costs associated with the
establishment of the water system; and
(9) All other costs relating to developing a
new water supply not otherwise categorized and identified above.
(d) The source replacement program
shall:
(1) Identify other withdrawals in the
recharge area for the adversely impacted source;
(2) Define the performance standards at which
alternative supply will be provided to the user, including the following:
a. Location and type of source;
c. Minimum and maximum volumes and rates of
delivery;
e. Any water quality treatment
or testing practices;
(3)
Provide a schedule by which alternative supply will be provided;
(4) Estimate the initial capital costs
associated with establishing the alternative supply; and
(5) Estimate the costs to the user of the
alternative supply after it is established by the permittee, including the
per-unit cost and projected annual costs.
(e) The need for installation of drinking
water treatment equipment associated with the source replacement plan
performance standard required by (d)(2), above, shall be based on results of
water quality sampling prior to and following source replacement activities for
the following parameters:
(1) Regulated
inorganic chemical contaminants listed in Env-Dw 704;
(2) Regulated volatile organic chemical
contaminants listed in Env-Dw 705;
(3) Regulated contaminants with secondary
maximum contaminant levels listed in Env-Dw 706;
(6) Other compounds based on the assessment
of potential contaminant sources in the vicinity of the withdrawal.
(f) Subject to (g), below, water
quality treatment equipment shall be provided for the following situations, as
applicable:
(1) A contaminant is detected in
the post-source replacement water quality sample at a concentration in excess
of a maximum contaminant level established in Env-Dw 702 through Env-Dw 705, in
which case the water quality treatment equipment shall be designed to reduce
the contaminant's concentration to below the maximum contaminant
level;
(2) A contaminant is
detected in the post-source replacement water quality sample at a concentration
in excess of a secondary maximum contaminant level established in Env-Dw 706,
in which case the water quality treatment equipment shall be designed to reduce
the contaminant's concentration to no more than the concentration observed in
the pre-source replacement water quality sample; or
(3) Radon is detected in the post-source
replacement water quality sample at a concentration above 2,000 picocuries per
liter when the radon concentration in the pre-source replacement water quality
sample was less than 2,000 picocuries per liter, in which case the water
quality treatment equipment shall be designed to reduce the contaminant's
concentration to less than 2,000 picocuries per liter.
(g) Water quality treatment equipment shall
not be required if the adversely affected water source is used solely for
irrigation for landscaping.
(h) The
permittee shall not be responsible for implementing source replacement,
including water treatment, for a particular water user if that water user does
not authorize the implementation of the source replacement program.
(i) A list of the water treatment equipment
alternatives that are proposed to meet the requirements of (f), above, shall be
provided to the department prior to installation. The equipment that has the
lowest operation and maintenance cost over a 10-year period shall be selected
unless the owner of the adversely-impacted source and the permittee mutually
agree to an alternative technology.
(See Revision Note at part heading for Env-Wq 403) #9569,
eff 10-17-09
