Current through August 26, 2024
(1) APPLICABILITY.
The requirements of this section apply to small quantity generators who
accumulate hazardous waste in tanks for less than 180 days (or 270 days if the
generator must ship the waste greater than 200 miles) and do not accumulate
over 6,000 kg (13,230 pounds) on-site at any time.
(2) GENERAL OPERATING REQUIREMENTS.
Generators shall comply with all of the following requirements:
(a) Treatment or storage of hazardous waste
in tanks shall comply with s.
NR 665.0017(2).
(b) Hazardous wastes or treatment reagents
may not be placed in a tank if they could cause the tank or its inner liner to
rupture, leak, corrode or otherwise fail before the end of its intended
life.
(c) Uncovered tanks shall be
operated to ensure at least 60 centimeters (2 feet) of freeboard, unless the
tank is equipped with a containment structure (e.g., dike or trench), a
drainage control system or a diversion structure (e.g., standby tank) with a
capacity that equals or exceeds the volume of the top 60 centimeters (2 feet)
of the tank.
(d) Where hazardous
waste is continuously fed into a tank, the tank shall be equipped with a means
to stop this inflow (e.g., waste feed cutoff system or by-pass system to a
stand-by tank).
Note: These systems are intended to be used in
the event of a leak or overflow from the tank due to a system failure (e.g., a
malfunction in the treatment process, a crack in the tank,
etc.).
(3)
INSPECTIONS. Except as noted in sub. (6), generators shall inspect all of the
following, where present:
(a) Tank discharge
control equipment (e.g., waste feed cutoff systems, by-pass systems and
drainage systems) at least once each operating day, to ensure that it is in
good working order.
(b) Data
gathered from monitoring equipment (e.g., pressure and temperature gauges) at
least once each operating day to ensure that the tank is being operated
according to its design.
(c) The
level of waste in the tank at least once each operating day to ensure
compliance with sub. (2) (c).
(d)
The construction materials of the tank at least weekly to detect corrosion or
leaking of fixtures or seams.
(e)
The construction materials of, and the area immediately surrounding, tank
discharge confinement structures (e.g., dikes) at least weekly to detect
erosion or obvious signs of leakage (e.g., wet spots or dead vegetation).
Note: As required by s.
NR 665.0015(3), the owner or operator
shall remedy any deterioration or malfunction found.
(6) CLOSURE. Generators shall,
upon closure of the facility, remove all hazardous waste from tanks, discharge
control equipment and discharge confinement structures.
Note: At closure, as throughout the operating
period, unless the owner or operator can demonstrate, in accordance with s.
NR 661.03(3) or
(4), that any solid waste removed from the
tank is not a hazardous waste, the owner or operator becomes a generator of
hazardous waste and shall manage it in accordance with all applicable
requirements of chs. NR 662, 663 and 665.
(7) SPECIAL REQUIREMENTS FOR IGNITABLE OR
REACTIVE WASTES. Generators shall comply with all of the following
requirements:
(a) Ignitable or reactive waste
may not be placed in a tank, unless subd. 1., 2. or 3. applies:
1. The waste is treated, rendered or mixed
before or immediately after placement in a tank so that all of the following
apply:
a. The resulting waste, mixture or
dissolution of material no longer meets the definition of ignitable or reactive
waste under s.
NR
661.21 or 661.23.
b. Section
NR 665.0017(2) is complied
with.
2. The waste is
stored or treated in such a way that it is protected from any material or
conditions that may cause the waste to ignite or react.
3. The tank is used solely for
emergencies.
(b) The
owner or operator of a facility which treats or stores ignitable or reactive
waste in covered tanks shall comply with the buffer zone requirements for tanks
contained in Tables 2-1 to 2-6 of the "National Fire Protection Association's
Flammable and Combustible Liquids Code" (1977 or 1981), incorporated by
reference in s.
NR 660.11.
(8) SPECIAL REQUIREMENTS FOR INCOMPATIBLE
WASTES. Generators shall comply with all of the following requirements:
(a) Incompatible wastes, or incompatible
wastes and materials, (see Appendix V of ch. NR 665 for examples) may not be
placed in the same tank, unless s.
NR 665.0017(2) is complied
with.
(b) Hazardous waste may not
be placed in an unwashed tank which previously held an incompatible waste or
material, unless s.
NR 665.0017(2) is complied
with.
