What is categorically excluded NEPA?

Could you please clarify what you mean by "categorically excluded NEPA"? As far as I know, the National Environmental Policy Act (NEPA) in the United States requires federal agencies to consider the environmental impacts of their actions and decisions. However, there are certain categories of actions that are exempt or "categorically excluded" from the need for detailed environmental analysis under NEPA. These exclusions are typically for actions that have minimal or no potential for significant environmental impacts. Could it be that you're asking about the specific types of activities that are categorically excluded from NEPA review? If so, these can include routine maintenance and repair activities, certain types of land acquisitions, administrative actions, and other activities that are determined to have little to no potential for environmental harm. It's important to note that while these actions may be categorically excluded from NEPA review, they still need to comply with other relevant environmental laws and regulations. Additionally, the decision to categorically exclude an action is often subject to public scrutiny and comment, ensuring that the potential environmental impacts are thoroughly considered before any exclusion is granted.