This opportunity involves replacing HVAC systems at three substations: Hayden Substation in Routt County, Colorado; Shiprock Substation in San Juan County, New Mexico; and Vernal Substation in Uintah County, Utah. Work will be performed within existing substation confines on WAPA or Bureau of Land Management lands, using existing access routes without new road construction. The project requires hand tools and refrigerant removal/addition equipment. Work may occur at any time prior to the contract's expiration date. No budget amount or specific submission timeline is provided.