Current through Register Vol. 30, No. 38, September 20, 2024
A. A facility which receives PCS for
treatment, storage, or disposal shall be designed and operated to ensure
compliance with the following performance standards relating to aquifer
protection:
1. Pollutants discharged shall in
no event cause or contribute to a violation of Aquifer Water Quality Standards,
at the applicable point of compliance, or, if the facility is a municipal solid
waste landfill, it shall comply with the requirements of A.R.S. §
49-761.01(C).
2. Any pollutant
discharged shall not further degrade, at the applicable point of compliance,
the quality of any aquifer that already violates an Aquifer Water Quality
Standard for that pollutant.
B. A facility which receives PCS for
treatment, storage, or disposal shall meet the general design criteria of
either subsection (B)(1) or (2) as follows:
1. The PCS shall be held within a containment
system designed and constructed to preclude the migration of contaminants into
subsurface soil, groundwater, or surface water. The containment system shall
meet the following criteria:
a. Maintain a
maximum permeability coefficient of no more than 1 x
10-7 cm/sec;
b. Be designed to provide structural
integrity throughout the life of the facility;
c. Be designed in accordance with the
applicable design criteria set forth in subsection (C) of this Section and
R18-13-1609 through R18-13-1613; or
2. An alternative design shall contain, at a
minimum, all of the following and shall demonstrate that the design will limit
discharges listed in A.R.S. §
49-243(D)
to the maximum extent practicable:
a. The hydrogeologic setting of the facility
and the capacity of the liner and soils to preclude discharge to groundwater or
surface water;
b. The operating
methods, processes, or other alternatives to be used at the facility;
c. Additional factors which would influence
the quality and mobility of the leachate produced and the potential for that
leachate to migrate to groundwater or surface water.
C. A PCS treatment, storage, or
disposal facility shall meet the following general design criteria:
1. The facility shall be designed to prevent
run-on and run-off. The design shall provide run-on control for the peak
discharge from a 24-hour, 25-year storm event. Run-off shall be collected and
controlled for at least the water volume resulting from a 24-hour, 25-year
storm event.
2. The facility shall
not restrict the flow of the 100-year floodplain, reduce temporary water
storage capacity of the floodplain, or be maintained in a manner which results
in a washout or inundation of the PCS.
3. The owner or operator shall control public
access and shall prevent unauthorized vehicular traffic and illegal
dumping.
4. The owner or operator
shall manage any standing water that has come into contact with the PCS in
accordance with rules promulgated pursuant to A.R.S. §
49-761
et seq.
D. A facility
which manages PCS in accordance with the requirements of this Article shall be
exempt from the aquifer protection permit requirements in accordance with
A.R.S. §
49-250(B)(21).
E. A facility which has been issued an
aquifer protection permit from the Department shall be exempt from the
requirements of subsections (A) and (B) of this Section but shall comply with
the requirements of subsection (C).
