VERTEX is conducting the hazardous materials management of Phase I during the $1 billion plan to redevelop Collin Creek Mall into a mixed-use project with housing, entertainment and office spaces. The 100-acre project on U.S. Highway 75 will include a Crystal Lagoon water feature, retail and entertainment venues, and a luxury hotel. The redevelopment will have 2,300 apartments, along with single-family homes and senior living units. Plans include nearly 9 acres of parks and 1.6 miles of hiking trails. A large portion of the 37-year-old shopping mall will be demolished. The remaining portions will be converted into an open-air retail atrium.