Staff Sgt. Jon Dones, , 379th Expeditionary Civil Engineer Squadron water and fuels, tests the P.H. balance of filtered water that is used for indoor plumbing throughout the Blatchford Preston Complex August 16, 2015 at Al Udeid Air Base, Qatar. With the high number of deployed members here at Al Udeid, the 379th ECES water and fuels airmen stay busy day and night keeping the systems running to support the base. (U.S. Air Force photo/ Staff Sgt. Alexandre Montes)