Although construction began in May, Chicago-based HSA Commercial Real Estate will hold a groundbreaking ceremony on Sept. 23 to celebrate the start of construction for the Park 94 Business Park, located southwest of Highway 20 and County Highway V in Mt. Pleasant. HSA hired Butler-based Berghammer Construction Corp. to build a 320,000-square-foot speculative industrial building and a 125,000-square-foot speculative industrial building in the business park. Construction of the buildings is expected to be complete in December.