A Gainesville company is trying to give new life to a piece of South Hall County land with a troubled past. AD Capital Partners is set to ask Flowery Branch City Council on Thursday to annex an 8-acre strip of land that required environmental cleanup after a 1990 chemical spill and rezone it to light manufacturing and industrial. The action would bring the property, formerly owned by Avery Dennison, under the same zoning as an adjacent 31-acre tract that’s already in the city.