Current through March 20, 2024
Authority: IC 13-7
Affected:
40 CFR
144.6;
40 CFR
265.430
Sec. 3.
(a) Class I
wells are wells used by generators of hazardous waste or owners or operators of
hazardous waste management facilities to inject hazardous waste beneath the
lowermost formation containing, within one-fourth (1/4) of a mile of the well
bore, an underground source of drinking water. Class I wells also include other
industrial and municipal disposal wells which inject fluids beneath the
lowermost formation containing, within one-fourth (1/4) of a mile of the well
bore, an underground source of drinking water.
(b) Class II wells are wells which inject
fluids described as follows:
(1) Which are
brought to the surface in connection with conventional oil or natural gas
production and may be commingled with wastewaters from gas plants which are an
integral part of production operations, unless those waters are classified as a
hazardous waste at the time of injection.
(2) For enhanced recovery of oil or natural
gas.
(3) For storage of
hydrocarbons which are liquid at standard temperature and pressure.
(c) Class III wells are wells
which inject for extraction of minerals including the following:
(1) Mining of sulfur by the Frasch
process.
(2) In situ production of
uranium or other metals. This category includes only in situ production from
ore bodies which have not been conventionally mined. Solution mining of
conventional mines such as stopes leaching is included in Class V
wells.
(3) Solution mining of salts
of potash.
(d) Class IV
wells are wells described as follows:
(1)
Wells used by generators of hazardous waste or of radioactive waste, by owners
or operators of hazardous waste management facilities, or by owners or
operators of radioactive waste disposal sites, to dispose of hazardous waste or
radioactive waste into a formation which within one-fourth (1/4) of a mile of the
well contains an underground source of drinking water.
(2) Wells used by generators of hazardous
waste or of radioactive waste, by owners or operators of hazardous waste
management facilities, or by owners or operators of radioactive waste disposal
sites to dispose of hazardous waste or radioactive waste above a formation
which within one-quarter (1/4) mile of the well contains an underground source of
drinking water.
(3) Wells used by
generators of hazardous waste or owners or operators of hazardous waste
facilities to dispose of hazardous waste, which cannot be classified under
subsection (a) or this subsection, for example, wells used to dispose of
hazardous waste into or above a formation which contains an aquifer which has
been exempted pursuant to 40 CFR 146.04.
(e) Class V wells are injection wells not
included in Class I, II, III, or IV.
