Hot Mix Asphalt protects the environment by providing impermeable caps for abandoned landfills and deposits of hazardous materials.

This diversity of use is illustrated by a three-acre HMA cap on a portion of an abandoned landfill owned by the City of Tacoma, Washington

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From
Winning with asphalt: Asphalt Institute (2002)

EAPA Paper on landfill: https://eapa.org/members-login/