This $29,750 firm fixed price purchase order was awarded by the Defense Health Agency to Varian Medical Systems, Inc. for preventative maintenance on one government-owned Varian Variseed radiation therapy equipment located at the Naval Medical Center San Diego. The sole source award was justified as Varian is the original equipment manufacturer of the Variseed system, and no other companies were authorized as third-party service providers or had access to the necessary proprietary OEM parts. This purchase order is associated with Varian's role as the provider of radiation oncology equipment, software, and maintenance services under various indefinite delivery/indefinite quantity contracts it holds with agencies including the Defense Logistics Agency and Veterans Affairs networks, to support cancer treatment and related programs.