Established in 1980, Arredondo, Zepeda & Brunz is a consultant engineering and surveying firm. AZ&B has been involved in the development of the Dallas Airport and Alliance Airport in Fort Worth. The company has expertise in environmental assessments, categorical exclusions, hazmat-analysis, air-quality analysis, social and economic studies, noise studies, preparation of storm-water pollution prevention plans, design of erosion and sediment control facilities and design of detention, retention and sediment basins. AZ&B has performed design, studies and survey efforts for highway, roadway and bridge projects in Dallas county, Tarrant county and Kaufman county. The company has also performed design work for DART and has done survey work for Dallas Central Business District, ACT 21, MLK Transit Center, North Irving Transit Center and Pleasant Grove Transit Center. AZ&B has also performed site grading, storm-drainage and paving-and right-of-way, boundary, topographical mapping and subsurface utility location surveys for various projects. The company is headquartered in Dallas.