This document is a site visit sign-in sheet for a federal contract opportunity at Tinker Air Force Base. The solicitation (FA813725R0015) is a two-step competitive 8(a) contract for HVAC system repair in Building 3707, specifically targeting construction contractors with NAICS code 236220 who currently have offices in Oklahoma. Key details include the initial site visit scheduled for 24 April 2025 at 09:30am, with attendees required to meet at the building's south side main entrance. Contractors must RSVP by 2:00pm CT on 22 April 2025 and provide an Entry Access List (EAL) for base access, with all personnel needing to obtain temporary passes at the Tinker Pass & ID office before the site visit. The proposal due date is tentatively set for 02 June 2025, with the final date to be confirmed in the official solicitation document. The contract is being managed by the Department of the Air Force Materiel Command Air Force Sustainment Center.