The Virginia Department of Transportation recently monitored the construction of road improvements along a 12.9-km (8-mi) section of Interstate 66 in Fairfax County, Virginia. Approximately 4 km (2.5 mi) of the road improvements were located in soils and rocks that contain naturally occurring asbestos (actinolite/tremolite). Precautions were exercised to protect the safety of the workers and the public from airborne particles. The presence of the asbestos added extra costs and time delays to the project. Part of the problem was the lack of clear language in the initial contract bid requests. It is best to acknowledge the presence of naturally occurring asbestos before a contract goes to bid.