Current through August 26, 2024
(1) During
construction and installation, liners (except in the case of existing portions
of surface impoundments exempt from s.
NR 664.0221(1)) and cover systems
(e.g., membranes, sheets or coatings) shall be inspected for uniformity, damage
and imperfections (e.g., holes, cracks, thin spots or foreign materials). Both
of the following inspections are required immediately after construction or
installation:
(a) Synthetic liners and covers
shall be inspected, to ensure tight seams and joints and the absence of tears,
punctures or blisters.
(b)
Soil-based and admixed liners and covers shall be inspected for imperfections
including lenses, cracks, channels, root holes or other structural
non-uniformities that may cause an increase in the permeability of the liner or
cover.
(2) While a
surface impoundment is in operation, it shall be inspected weekly and after
storms to detect evidence of any of the following:
(a) Deterioration, malfunctions or improper
operation of overtopping control systems.
(b) Sudden drops in the level of the
impoundment's contents.
(c) Severe
erosion or other signs of deterioration in dikes or other containment
devices.
(3) Prior to
the issuance of an operating license, and after any extended period of time (at
least 6 months) during which the impoundment was not in service, the owner or
operator shall obtain a certification from a qualified engineer that the
impoundment's dike, including that portion of any dike which provides
freeboard, has structural integrity. The certification shall establish, in
particular, that the dike will do both of the following:
(a) Withstand the stress of the pressure
exerted by the types and amounts of wastes to be placed in the
impoundment.
(b) Not fail due to
scouring or piping, without dependence on any liner system included in the
surface impoundment construction.
(4)
(a) An
owner or operator required to have a leak detection system under s.
NR 664.0221(3)
or (4) shall record the amount of liquids
removed from each leak detection system sump at least once each week during the
active life and closure period.
(b)
After the final cover is installed, the amount of liquids removed from each
leak detection system sump shall be recorded at least monthly. If the liquid
level in the sump stays below the pump operating level for 2 consecutive
months, the amount of liquids in the sumps shall be recorded at least
quarterly. If the liquid level in the sump stays below the pump operating level
for 2 consecutive quarters, the amount of liquids in the sumps shall be
recorded at least semi-annually. If at any time during the long-term care
period the pump operating level is exceeded at units on quarterly or semi-
annual recording schedules, the owner or operator shall return to monthly
recording of amounts of liquids removed from each sump until the liquid level
again stays below the pump operating level for 2 consecutive months.
(c) "Pump operating level" is a liquid level
proposed by the owner or operator and approved by the department based on pump
activation level, sump dimensions and level that avoids backup into the
drainage layer and minimizes head in the sump.
