Code of Federal Regulations Title 40. Protection of Environment § 40.61.143 Standard for roadways

(a) It is a temporary roadway on an area of asbestos ore deposits (asbestos mine):  or

(b) It is a temporary roadway at an active asbestos mill site and is encapsulated with a resinous or bituminous binder. The encapsulated road surface must be maintained at a minimum frequency of once per year to prevent dust emissions;  or

(c) It is encapsulated in asphalt concrete meeting the specifications contained in section 401 of Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, FP–85, 1985, or their equivalent.