Section 4107. Plastic Film for Subgrade Treatment
A. Use polyethylene film no less than 0.85 mils (21 µm) thick, either clear or white pigmented type. Use strips wide enough to provide a lap no less than 12 inches (0.3 m) between adjacent strips.
B. Plastic film which has been used no more than once for curing concrete pavement and has been salvaged in usable condition may be used for treatment of subgrade.