Otis Dale Loomis, 87, who worked at Lawrence Livermore National Laboratory’s Site 300 from 1958 to 1988 and attended Grace Baptist Church, died Dec. 5 in Tracy. A graveside service with military honors will begin at noon Jan. 6 at Sacramento Valley National Cemetery, 5810 Midway Road, in Dixon. Tracy Memorial Chapel, 5 W. Highland Ave., is handling arrangements.