38 C.F.R. § 26.32
(a) The following classes of major Federal actions, which VA has determined normally do not significantly affect the quality of the human environment, may be categorically excluded from further NEPA analysis. The actions in this section followed by the parenthetic notation “(CXdoc)” require preparation of a CATEX document for each action, in accordance with § 26.30.
(ii) CATEX 2: Field studies and surveys. Site characterization studies and environmental monitoring, including siting, erecting, operating, and dismantling or closing of characterization and monitoring devices, in compliance with applicable environmental and historic preservation requirements. Such activities include, but are not limited to:
(CXdoc) . VA acquisition of land and/or buildings in the following circumstances:
(7) New construction and related activities—(i) CATEX 20: New construction (CXdoc). New construction in either of the following circumstances:
(iii) CATEX 22: Installing new or replacing or relocating onsite existing building components, site elements, utilities, and equipment (CXdoc). Installing, replacing, retrofitting, upgrading, or relocating onsite in a manner that substantially conforms to the pre-existing design, function, and location and complies with applicable environmental and historic preservation requirements. These activities include but are not limited to:
(iv) CATEX 23: Repair, renovation, and maintenance. Repair, renovation, maintenance, grounds-keeping, and custodial activities at VA facilities provided that the activities conform to pre-existing design and are performed in accordance with applicable environmental and historic preservation requirements such as those governing the use of toxic or hazardous materials. These activities include but are not limited to:
(iii) CATEX 28: Conservation and energy efficiency measures (CXdoc for certain project types). Actions to conserve water or energy, demonstrate potential water or energy conservation, or promote energy efficiency improvements that do not exceed capacity of system components or have the potential to change concentrations of potentially harmful substances including but not limited to: