Portal:Environmental Protection Agency

“ Class VI Wells Under the UIC Program
Class VI wells are used to inject CO2 into deep rock formations for the purpose of long-term underground storage, also known as geologic sequestration. Geologic sequestration, when used as a part of carbon capture and storage and carbon dioxide removal projects, is a promising tool for reducing the amount of carbon dioxide in the atmosphere. Class VI injection wells are regulated under an existing, rigorous Safe Drinking Water Act (SDWA) permitting framework that protects underground sources of drinking water. ”

“ EPA also follows guidance from the Council on Environmental Quality to ensure that the advancement of carbon capture, utilization, and sequestration technologies are done in a responsible manner that incorporates the input of communities and reflects the best available science. ”

“ Modeling to define the area where the carbon will be stored over the lifetime of operation. Evaluation to ensure all potential pathways for fluid movement have been identified and addressed through corrective action. Well construction requirements that ensure the Class VI injection well will not leak carbon dioxide. Testing and monitoring throughout the life of the project, including after carbon dioxide injection has ended. ”