SAN ANTONIO — The Environmental Protection Agency has awarded Energy Star certification for Fountainhead Business Park II, a three-story office building located at 4545 Horizon Hill Rd. in San Antonio. The project is part of a two-building office campus that is managed by Grubb & Ellis Realty Investors on behalf of one of its private client investors. The building is situated on 12.4 acres; it includes approximately 89,000 square feet of rentable space and 1,100 parking spaces. It is currently fully occupied by Boston-based Genzyme Corp.