Water Treatment Service for Heating, Ventilation, and Air Conditioning System

The purpose of Amendment 0005 to solicitation FA449726Q0031 is to: Reopen the solicitation. AMENDMENT 0004 – FINAL Q&A AND UPDATED PWS The purpose of Amendment 0004 to solicitation FA449726Q0031 is to: 1. Publish Final Consolidated Q&A: The official Government responses to the final round of vendor

questions following the site visit are provided in the attached document: Attachment 10 - FA449726Q0031 QA Log 2. Issue Updated Performance Work Statement (PWS): This document replaces the original PWS and is provided in the attached document: Attachment 11 - Updated-PWS All other terms, conditions, and deadlines remain unchanged. AMENDMENT 0003 – Q&A, SITE VISIT, AND DEADLINE EXTENSION The purpose of Amendment 0003 to solicitation FA449726Q0031 is to: 1. Publish Official Q&A: The official Government responses to initial vendor

questions are provided in the attached document: Attachment 8 - FA449726Q0031 QA Log. 2. Announce a Site Visit: A site visit will be held at Dover Air Force Base on

25 June 2026 at 9:30 AM EDT. Attendees must arrive 45 minutes prior to the scheduled start time (at 8:45 AM EDT) for security check-in. Attendance is highly encouraged but not mandatory. Please review the attached document: Attachment 9 - Site Visit Instructions and Deadline Extension. 3. Extend Deadlines: The deadline for final or additional

questions is extended to

01 July 2026 @ 1:00 PM EDT. The Quote Response Deadline is extended to