WHITINSVILLE - Koopman Lumber is expanding into Cape Cod. It will be the 12th location for the family-owned Whitinsville-based business. The Worcester Business Journal reports the nearly 8,880-square-foot store will include a drive-through lumber yard and two warehouses. Founded in 1939, Koopman is now run by the third generation of owners, CEO Dirk Koopman; his sister, CFO Denise Brookhouse; and her husband, COO Tony Brookhouse. And the fourth generation also works in some locations.