Cal. Code Regs. Tit. 22, § 66265.222 - Action Leakage Rate
(a) The owner or operator of surface
impoundment units subject to section
66265.221(a)
shall submit a proposed action leakage rate to the Department when submitting
the notice required under section
66265.221(b). The
Department will establish an action leakage rate, either as proposed by the
owner or operator or modified using the criteria in this section.
(b) The Department shall approve an action
leakage rate for surface impoundment units subject to section
66265.221(a). The
action leakage rate is the maximum design flow rate that the leak detection
system (LDS) can remove without the fluid pressure head on the bottom liner
exceeding 1 foot (30.5 cm) at any given portion of the liner. The action
leakage rate shall include an adequate safety margin to allow for uncertainties
in the design (e.g., slope, hydraulic conductivity, 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 (e.g., 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, etc.).
(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
under section
66265.226(b), to
an average daily flow rate (gallons per acre per day) for each sump. Unless the
Department approves a different calculation, the average daily flow rate for
each sump shall be calculated weekly during the active life and closure period,
and if the unit closes in accordance with section
66265.228(a)(2),
monthly during the post-closure care period when monthly monitoring is required
under section
66265.226(b).
Notes
2. Repealer and new section filed 7-19-95; operative 8-18-95 (Register 95, No. 29).
3. Change without regulatory effect amending subsection (b) filed 6-30-97 pursuant to section 100, title 1, California Code of Regulations (Register 97, No. 27).
4. Change without regulatory effect amending NOTE filed 6-7-2004 pursuant to section 100, title 1, California Code of Regulations (Register 2004, No. 24).
Note: Authority cited: Sections 25150 and 25159, Health and Safety Code; and Governor's Reorganization Plan Number 1 of 1991. Reference: Sections 25159 and 25159.5, Health and Safety Code; and 40 CFR Section 265.222.
2. Repealer and new section filed 7-19-95; operative 8-18-95 (Register 95, No. 29).
3. Change without regulatory effect amending subsection (b) filed 6-30-97 pursuant to section 100, title 1, California Code of Regulations (Register 97, No. 27).
4. Change without regulatory effect amending Note filed 6-7-2004 pursuant to section 100, title 1, California Code of Regulations (Register 2004, No. 24).
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