A commercial real estate developer is clearing a 100-acre site in western Pennsylvania for a roughly $9 million project with the help of a $7 million loan from a regional development fund. Castlebrook Development Group is working to get an industrial park ready in anticipation of the manufacturing opportunities that are expected to be created by Shell Chemical Appalachia LLC’s ethane cracker, scheduled to come online in the early 2020s. The cracker is under construction in Beaver County, 15 miles south of the Castlebrook site. The Power of 32 Site Development Fund, backed by local banks, nonprofits and private companies, made the loan for Castlebrook.