A Gainesville man was arrested Friday and charged with aggravated assault, accused of hitting his co-worker with a shovel in a May 13 altercation at a construction site. Misael Vargas, 24, is accused of hitting Jose Baldimire Saravia, 33, with a shovel repeatedly about the head and body causing serious bodily injury, according to the arrest warrant. Vargas was charged with one count of aggravated assault.