David L. Davis, facilities maintenance and services assistant on Marine Corps Logistics Base Barstow, Calif., reviews a work order at his desk, Nov. 20. Facilities maintenance works to keep buildings and equipment on MCLB Barstow in working order - David L. Davis, facilities maintenance and services assistant on Marine Corps Logistics Base Barstow, Calif., reviews a work order at his desk, Nov. 20. Facilities maintenance works to keep buildings and equipment on MCLB Barstow in working order