GROB Systems apprentices are cleaning up Bluffton. On Friday, eight apprentices put in a total of 32-man hours clearing brush at the Marsh Run area at Main Street and the swimming pool. Mike Hawk, training supervisor of the program, said he expects up to 30 apprentices will be involved in some type of volunteer work this month. Bryan Lloyd, assistant village administrator, said that next Friday the group will place mulch and  work toward a clean-up at the Buckeye park.