Section 329 IAC 3.1-10-3 - Classification of underground injection wellsAuthority: 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.Solid Waste Management Board; 329 IAC 3.1-10-3; filed Jan 24, 1992, 2:00 p.m.: 15 IR 938; readopted filed Jan 10, 2001, 3:25 p.m.: 24 IR 1535