020-29 Wyo. Code R. §§ 29-2 - Definitions

The following definitions supplement those contained in W.S. § 35- 11-103 of the Wyoming Environmental Quality Act:

(a) "Carbon dioxide stream" means carbon dioxide, plus associated substances derived from the source materials and any processing, and any substances added to the stream to enable or improve the injection process. Within this Chapter, the term "carbon dioxide stream" does not include any carbon dioxide stream that meets the definition of a hazardous waste under 40 C.F.R. § 261.3.

(b) "Class II well" means any commercial or non-commercial well used to dispose of water or fluids directly associated with the production of oil or gas, any well used to inject fluids or gas for enhanced oil recovery, or any well used for the storage of liquid hydrocarbons.

(c) "Class VI well" means a well that is used for injecting a carbon dioxide stream for geologic sequestration that:

(i) Is not experimental in nature and injects a carbon dioxide stream for geologic sequestration, beneath the lowermost formation containing an underground source of drinking water;

(ii) Has been granted a waiver of the injection depth requirements pursuant to requirements of Water Quality Rules Chapter 24, Section 15; or

(iii) Has received an expansion to the areal extent of an existing Class II enhanced oil recovery or enhanced gas recovery aquifer exemption pursuant to Water Quality Rules Chapter 24, Section 16.

(d) "Geologic sequestration project" means an injection well or wells used to emplace a carbon dioxide stream into an injection zone for geologic sequestration. It includes the subsurface three-dimensional extent of the carbon dioxide plume, associated pressure front, and displaced fluid, as well as the surface area above that delineated region.

Notes

020-29 Wyo. Code R. §§ 29-2

Adopted, Eff. 8/19/2022.