Danbury officials have given the green light for a four-building industrial condo expansion at 15 Great Pasture Road, near the Bethel border. The 14-acre site, once contaminated from past industrial use, was remediated to federal standards 20 years ago. City environmental inspectors praised landlord Eppoliti Industrial Realty for cleaning up remaining waste and protecting nearby wetlands. Three new buildings will go up in Danbury, with a fourth on the Bethel side, pending separate town approval.