Current through August 26, 2024
A generator shall determine its generator category. A
generator's category is based on the amount of hazardous waste generated each
month and may change from month to month. This section sets forth procedures to
determine whether a generator is a "very small quantity generator," a "small
quantity generator," or a "large quantity generator" for a particular month, as
each of those terms is defined in s.
NR 660.10, by applying any of the following, as
applicable:
(1) GENERATORS OF EITHER
ACUTE HAZARDOUS WASTE OR NON-ACUTE HAZARDOUS WASTE. A generator who either
generates acute hazardous waste or non-acute hazardous waste in a calendar
month shall determine its generator category for that month by doing all of the
following:
(a) Counting the total amount of
hazardous waste generated in the calendar month.
(b) Subtracting from the total any amounts of
waste exempt from counting as described in subs. (3) and (4).
(c) Determining the resulting generator
category for the hazardous waste generated using Table 1.
(2) GENERATORS OF BOTH ACUTE AND NON-ACUTE
HAZARDOUS WASTES. A generator who generates both acute hazardous waste and
non-acute hazardous waste in the same calendar month shall determine its
generator category for that month by doing all of the following:
(a) Counting separately the total amount of
acute hazardous waste and the total amount of non-acute hazardous waste
generated in the calendar month.
(b) Subtracting from each total any amounts
of waste exempt from counting as described in subs. (3) and (4).
(c) Determining separately the resulting
generator categories for the quantities of acute and non-acute hazardous waste
generated using Table 1.
(d)
Comparing the resulting generator categories from par. (c) and applying the
more stringent generator category to the accumulation and management of both
non-acute hazardous waste and acute hazardous waste generated for that month.
Table 1
Generator Categories Based on Quantity of Waste
Generated in a Calendar Month
|
Quantity of acute hazardous waste generated
in a calendar month
|
Quantity of non-acute hazardous waste
generated in a calendar month
|
Quantity of residues from a cleanup of
acute hazardous waste generated in a calendar month
|
Generator category
|
|
> 1 kg
|
Any amount
|
Any amount
|
Large quantity generator.
|
|
Any amount
|
>= 1,000 kg
|
Any amount
|
Large quantity generator.
|
|
Any amount
|
Any amount
|
>100 kg
|
Large quantity generator.
|
|
<= 1 kg
|
> 100 kg and < 1,000 kg
|
<= 100 kg
|
Small quantity generator.
|
|
<= 1 kg
|
<= 100 kg
|
<= 100 kg
|
Very small quantity generator.
|
(3) MONTHLY QUANTITY-BASED DETERMINATIONS.
When making the monthly quantity-based determinations required under this
chapter, the generator shall include all hazardous waste that it generates,
except hazardous waste that is any of the following:
(a) Exempt from regulation under ss.
NR 661.0004(3) to (6), 661.0006(1) (c), 661.0007(1) (a), or 661.0008.
(b)
Managed immediately upon generation in on-site elementary neutralization units,
wastewater treatment units, or totally enclosed treatment facilities as defined
in s.
NR 660.10.
(c) Recycled, without prior storage or
accumulation, only in an on-site process subject to regulation under s.
NR 661.0006(3) (b).
(d) Used oil that is managed under the
requirements specified in s.
NR 661.0006(1) (d) and ch. NR
679.
(e) Spent lead-acid batteries
managed under the requirements specified in subch. G of ch. NR 666.
(f) Universal waste managed under s.
NR 661.0009 and ch. NR 673.
(g) A hazardous waste that is an unused
commercial chemical product listed in subch. D of ch. NR 661 or exhibiting one
or more characteristics in subch. C of ch. NR 661 that is generated solely as a
result of a laboratory clean-out under s.
NR 662.213
conducted at an eligible academic entity, as defined in s.
NR 662.200(3).
(h) Managed as part of an episodic event in
compliance with the conditions under subch. L.
(i) A hazardous waste pharmaceutical, as
defined in s.
NR 666.500, that is subject to or managed in accordance
with subch. P of ch. NR 666 or is a hazardous waste pharmaceutical that is also
a drug enforcement administration controlled substance and is conditionally
exempt under s.
NR 666.506.
(4) DETERMINING THE QUANTITY OF HAZARDOUS
WASTE GENERATED IN A CALENDAR MONTH. In determining the quantity of hazardous
waste generated in a calendar month, a generator need not include any of the
following:
(a) Hazardous waste when it is
removed from on-site accumulation, so long as the hazardous waste was
previously counted once.
(b)
Hazardous waste generated by on-site treatment, including reclamation, of the
generator's hazardous waste, so long as the hazardous waste that is treated was
previously counted once.
(c)
Hazardous waste spent materials that are generated, reclaimed, and subsequently
reused on-site, so long as the spent materials were previously counted
once.
(5) GENERATOR
CATEGORY. Based on the generator category as determined under this section, the
generator shall meet the applicable independent requirements listed in s.
NR 662.010. A generator's category also determines which
of the provisions specified in s.
NR 662.014, 662.015, 662.016, or 662.017 shall be met to
obtain an exemption from the storage facility license, interim status, and
operating requirements when accumulating hazardous waste.
(6) MIXING HAZARDOUS WASTES WITH SOLID
WASTES.
(a)
Very small quantity
generator wastes.1. Hazardous wastes
generated by a very small quantity generator may, as part of a treatment
process, be mixed with solid wastes. A very small quantity generator may, as
part of a treatment process, mix a portion or all of its hazardous waste with
solid waste and remain subject to s.
NR 662.014 even though the resultant mixture exceeds the
quantity limits identified in the definition of very small quantity generator
under s.
NR 660.10(139), unless the mixture
exhibits one or more of the characteristics of hazardous waste identified in
subch. C of ch. NR 661. Legitimate treatment processes include the following
examples: stabilization and solidification, polymerization, electrochemical
oxidation of organic chemicals, elementary neutralization, and precipitating
heavy metals out of solution.
Note: The mixing of hazardous waste by a very
small quantity generator into a disposal container, such as a roll off box
containing solid wastes, is not considered a treatment
process.
2. If the resulting
mixture exhibits a characteristic of hazardous waste, this resultant mixture is
a newly generated hazardous waste. The very small quantity generator shall
count both the resultant mixture amount plus the other hazardous waste
generated in the calendar month to determine whether the total quantity exceeds
the very small quantity generator calendar month quantity limits identified in
the definition of generator categories under s.
NR 660.10. If so, to remain exempt from the permitting,
interim status, and operating standards, the very small quantity generator
shall meet the conditions for exemption applicable to either a small quantity
generator or a large quantity generator. The very small quantity generator
shall also comply with the applicable independent requirements for either a
small quantity generator or a large quantity generator.
3. If a very small quantity generator's
wastes are mixed with used oil, the mixture is subject to ch. NR 679. Any
material produced from such a mixture by processing, blending, or other
treatment is also regulated under ch. NR 679.
(b)
Small quantity generator and
large quantity generator wastes.
1.
Hazardous wastes generated by a small quantity generator or large quantity
generator may be mixed with solid waste. These mixtures are subject to the
following: the mixture rule specified in s.
NR 661.0003(1) (b)
4., (2) (b) and (c), and (7) (b) 1.; the
prohibition of dilution rule specified in s.
NR 668.03(1); the land disposal
restriction requirements specified in s.
NR 668.40 if a characteristic hazardous waste is mixed
with a solid waste so that it no longer exhibits the hazardous characteristic;
and the hazardous waste determination requirement specified in s.
NR 662.011.
2. If the resulting mixture is found to be a
hazardous waste, this resultant mixture is a newly generated hazardous waste. A
small quantity generator shall count both the resultant mixture amount plus the
other hazardous waste generated in the calendar month to determine whether the
total quantity exceeds the small quantity generator calendar monthly quantity
limits identified in the definition of generator categories under s.
NR 660.10. If so, to remain exempt from the permitting,
interim status, and operating standards, the small quantity generator shall
meet the conditions for exemption applicable to a large quantity generator. The
small quantity generator shall also comply with the applicable independent
requirements for a large quantity generator.
