With the clock ticking to provide sewer service to Gateway Industrial Centre, a planned development that will include the new Georgia Poultry Laboratory, the Hall County Board of Commissioners voted Thursday night to move ahead with its plan to build a wastewater treatment plant in North Hall. The county agreed to provide sewer service to the 518-acre industrial park within 36 months after Georgia Poultry closed on its property there in October. It’s expected to cost $3.2 million for the county to build a 3,500-foot gravity sewer and 75,000-gallons-per-day treatment plant.