Construction is expected to start soon on a second single-story building at ProCare Park, a 23-acre site on Queen City Parkway/Ga. 60 at Interstate 985. ProCare Rx, a national pharmacy benefit management company headquartered in the park, hopes to move into the building in the spring. A groundbreaking ceremony is set for Friday morning on the 31,200-square-foot building, which will basically mirror the ProCare Rx building now in place at the park — except for size, as the first building has 42,900 square feet.