NR 815.04NR 815.04 Classification of injection wells. Injection wells are classified as follows: NR 815.04(1)(1) Class i injection well. A class I well is any of the following: NR 815.04(1)(a)(a) A well used for underground injection of a fluid classified as a hazardous waste or a fluid containing any substance classified as a hazardous waste below the lowermost formation containing an underground source of drinking water. NR 815.04(1)(b)(b) A well used for underground injection of a fluid containing an industrial or municipal waste below the lowermost formation containing an underground source of drinking water. NR 815.04(1)(c)(c) A well used for underground injection of a fluid containing a radioactive waste below the lowermost formation containing an underground source of drinking water. NR 815.04(2)(2) Class ii injection well. A class II well is any of the following: NR 815.04(2)(a)(a) A well used for underground injection of a fluid that was brought to the surface in connection with activities that are related to the conventional production of oil or natural gas, or the underground storage of natural gas, that may be commingled with wastewater that is produced during production operations, except for any wastewater that is classified as a hazardous waste at the time of injection. NR 815.04(2)(b)(b) A well used for enhanced recovery of oil or natural gas. NR 815.04(2)(c)(c) A well used for storage of hydrocarbons that are liquid at standard temperature and pressure. NR 815.04(3)(3) Class iii injection well. A class III well is a well used for solution mining of minerals including, but is not limited to: NR 815.04(3)(b)(b) A well used for in-situ production of uranium or other metals from ore bodies that have not been conventionally mined. NR 815.04 NoteNote: A well used for solution mining of conventional mines, such as stopes leaching, is classified as a class V injection well.
NR 815.04(4)(4) Class iv injection well. A class IV well is any of the following: NR 815.04(4)(a)(a) A well used for underground injection of a hazardous waste or radioactive waste or a fluid containing a hazardous waste or radioactive waste into a formation that contains an underground source of drinking water. NR 815.04(4)(b)(b) A well used for underground injection of hazardous waste or radioactive waste or a fluid containing a hazardous waste or radioactive waste above a formation which contains an underground source of drinking water. NR 815.04(5)(5) Class v injection well. Any well used for underground injection that is not classifiable as a class I, II, III or IV injection well. NR 815.04 HistoryHistory: CR 01-104: cr. Register October 2004 No. 586, eff. 11-1-04. NR 815.05NR 815.05 Underground source of drinking water. NR 815.05(1)(1) Any aquifer or groundwater, or portion of any aquifer or groundwater, located within the jurisdictional boundaries of the state is an underground source of drinking water. NR 815.05(2)(2) No regulatory agency may exempt any aquifer or groundwater, or portion of an aquifer or groundwater, located within the jurisdictional boundaries of the state from designation as an underground source of drinking water. NR 815.05 HistoryHistory: CR 01-104: cr. Register October 2004 No. 586, eff. 11-1-04. NR 815.06NR 815.06 Prohibitions. The following activities are prohibited: NR 815.06(1)(1) Construction of a class I injection well or use of a well as a class I injection well. NR 815.06 NoteNote: Use of a well to place a hazardous waste underground is prohibited as specified in s. NR 665.0430. Use of a well to place municipal or domestic wastewater underground is prohibited as specified in s. NR 206.07 (2) (d). Use of a well to place a pollutant underground is prohibited as specified in s. NR 214.04 (3). NR 815.06(2)(2) Construction of a class II injection well or use of a well as a class II injection well.