Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 704 - UIC PERMIT PROGRAM
Subpart A - GENERAL PROVISIONS
Section 704.106 - Classification of Injection Wells
Universal Citation: 35 IL Admin Code ยง 704.106
Current through Register Vol. 48, No. 38, September 20, 2024
Injection wells are classified as follows:
a) Class I Injection Wells. Any of the following is a Class I injection well:
1) A
well used by a generator of hazardous waste or the owner or operator of a
hazardous waste management facility to inject hazardous waste beneath the
lowermost formation containing a USDW within 402 meters (one-quarter mile) of
the well bore.
2) Any other
industrial and municipal disposal well that injects fluids beneath the
lowermost formation containing a USDW within 402 meters (one-quarter mile) of
the well bore.
3) A radioactive
waste disposal well that injects fluids below the lowermost formation
containing a USDW within 402 meters (one-quarter mile) of the well
bore.
b) Class II Injection Wells. Any well that injects any of the following fluids is a Class II injection well:
1) Fluids that are brought
to the surface in connection with natural gas storage operations, or
conventional oil or natural gas production, and which may be commingled with
waste waters from gas plants that are an integral part of production
operations, unless those waters are classified as a hazardous waste at the time
of injection;
2) Fluids injected
for enhanced recovery of oil or natural gas; and
3) Fluids injected for storage of
hydrocarbons that are liquid at standard temperature and pressure.
c) Class III Injection Wells. Any well that injects fluids for the extraction of minerals, including the following:
1) The mining of sulfur by the
Frasch process;
2) The in-situ
production of uranium or other metals. This category includes only in-situ
production from ore bodies that have not been conventionally mined. Solution
mining of conventional mines, such as stopes leaching, is included as a Class V
injection well; and
3) Solution
mining of salts or potash.
d) Class IV Injection Wells. Any of the following is a Class IV injection well:
1) A
well used by a generator of hazardous waste or of radioactive waste, by the
owner or operator of a hazardous waste management facility or by the owner or
operator of a radioactive waste disposal site to dispose of hazardous wastes or
radioactive wastes into a formation that contains a USDW within 402 meters
(one-quarter mile) of the well.
2)
A well used by a generator of hazardous waste or of radioactive waste, by the
owner or operator of a hazardous waste management facility, or by the owner or
operator of a radioactive waste disposal site to dispose of hazardous waste or
radioactive waste above a formation that contains a USDW within 402 meters
(one-quarter mile) of the well.
3)
A well used by a generator of hazardous waste or the owner or operator of a
hazardous waste management facility to dispose of hazardous waste that cannot
be classified under any of subsections (a)(1), (d)(1), or (d)(2) (e.g., a well
that is used to dispose of hazardous waste into or above a formation that
contains an aquifer that has been exempted pursuant to 35 Ill. Adm. Code
730.104
).
e) Class V Injection Wells. Any injection well that is not classified as a Class I, II, III, IV, or VI injection well. Section 704.281 describes specific types of Class V injection wells.
f) Class VI Injection Wells.
1) An injection well that is not experimental
in nature which is used for geologic sequestration of carbon dioxide beneath
the lowermost formation containing a USDW;
2) An injection well that is used for
geologic sequestration of carbon dioxide which has been granted a permit that
includes alternative injection well depth requirements pursuant to Section
730.195;
or
3) An injection well that is
used for geologic sequestration of carbon dioxide which has received an
expansion to the areal extent of an existing Class II enhanced oil recovery or
enhanced gas recovery aquifer exemption pursuant to Section
704.123(d)
and 35 Ill. Adm. Code 730.104.
BOARD NOTE: Derived from 40 CFR 144.6 (2017).
Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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