Current through Register Vol. 49, No. 13, September 23, 2024
Subpart
1.
Scope.
The requirements of this part apply to small quantity and
very small quantity generators that accumulate hazardous waste in tanks, and do
not exceed accumulation amounts as provided in part
7045.0292.
Subp. 2.
General operating
requirements.
Generators regulated under this part must comply with the
following general operating requirements:
A. Treatment or storage of hazardous waste in
tanks must comply with part
7045.0562, subpart
2.
B. Hazardous wastes or treatment reagents
must not be placed in a tank if they could cause the tank or its inner liner to
rupture, leak, corrode, or otherwise fail.
C. Uncovered tanks must be operated to ensure
at least 60 centimeters of freeboard, unless the tank is equipped with a
containment structure such as a dike or trench, a drainage control system, or a
diversion structure such as a standby tank with a capacity that equals or
exceeds the volume of the top 60 centimeters of the tank.
D. Where hazardous waste is continuously fed
into a tank, the tank must be equipped with a means to stop this inflow such as
a waste feed cutoff system or bypass system to a standby tank.
Subp. 3.
Inspections.
Generators regulated under this part must inspect, where
present:
A. discharge control
equipment, such as waste feed cutoff systems, bypass 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 such as 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 subpart
2, item C;
D. the construction materials of the tank at
least weekly to detect corrosion or leaking of fixtures or seams; and
E. the construction materials of, and the
area immediately surrounding, discharge confinement structures such as dikes at
least weekly to detect erosion or obvious signs of leakage such as wet spots or
dead vegetation.
Subp.
4.
Closure.
Generators regulated under this part must, upon closure of
the facility, remove all hazardous waste from tanks, discharge control
equipment, and discharge confinement structures.
Subp. 5.
Ignitable and reactive
wastes.
Generators regulated under this part must comply with the
following special requirements for ignitable or reactive waste:
A. Ignitable or reactive waste must not be
placed in a tank, unless the waste is treated, rendered, or mixed before or
immediately after placement in a tank so that the resulting waste, mixture, or
dissolution of material no longer meets the definition of ignitable or reactive
waste under parts
7045.0131, subpart
2 or
5, and 7045.0562, subpart
2 is complied with, or 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, or 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 must comply with the buffer zone requirements for tanks
contained in the Minnesota State Fire Code, chapter 7510.
Subp. 6.
Incompatible wastes.
Generators regulated under this part must comply with the
following special requirements for incompatible wastes:
A. Incompatible wastes, or incompatible
wastes and materials, must not be placed in the same tank, unless part
7045.0562, subpart
2 is complied with.
B. Hazardous waste must not be placed in an
unwashed tank which previously held an incompatible waste or material unless
part
7045.0562, subpart
2 is complied with.
Statutory Authority: MS s
116.07;
116.37
