EPA is proposing to increase protection of public health and recover valuable energy resources by designating all scrap tires combusted in cement kilns as non-waste fuel, instead of limiting fuel use to tires collected in established tire collection programs. In addition, EPA is proposing to revise the definition of established tire collection program to include programs that recover scrap tires from tire piles. These proposed regulatory changes will facilitate the cleanup of abandoned scrap tire piles and increase the use of tires as an alternative fuel in cement kilns. These proposed revisions are amendments to the Non-Hazardous Secondary Materials (NHSM) regulations, which establish standards and procedures for identifying whether non-hazardous secondary materials are solid wastes when used as fuels or ingredients in combustion units.