Utah Admin. Code R315-265-302 - Landfills - Action Leakage Rate
(a) The
owner or operator of landfill units subject to Subsection R315-265-301(a) shall
submit a proposed action leakage rate to the director when submitting the
notice required under Subsection R315-265-301(b). Within 60 days of receipt of
the notification, the director will:
(1)
establish an action leakage rate, either as proposed by the owner or operator
or modified using the criteria in this section; or
(2) extend the review period for up to 30
days.
(3) If no action is taken by
the director before the original 60 or extended 90 day review periods, the
action leakage rate will be approved as proposed by the owner or
operator.
(b) The
director shall approve an action leakage rate for land fill units subject to
Subsection R315-265-301(a). The action leakage rate is the maximum design flow
rate that the leak detection system (LDS) can remove without the fluid head on
the bottom liner exceeding one foot. The action leakage rate shall include an
adequate safety margin to allow for uncertainties in the design, such as,
slope, hydraulic conductivity, and thickness of drainage material,
construction, operation, and location of the LDS, waste and leachate
characteristics, likelihood and amounts of other sources of liquids in the LDS,
and proposed response actions. for example, the action leakage rate shall
consider decreases in the flow capacity of the system over time resulting from
siltation and clogging, rib layover and creep of synthetic components of the
system, overburden pressures.
(c)
To determine if the action leakage rate has been exceeded, the owner or
operator shall convert the weekly or monthly flow rate from the monitoring data
obtained in accordance with Section R315-265-304 to an average daily flow rate,
gallons per acre per day, for each sump. Unless the director approves a
different calculation, the average daily flow rate for each sump shall be
calculated weekly during the active life and closure period, and monthly during
the post-closure care period if monthly monitoring is required under Subsection
R315-265-304(b).
Notes
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