Specifications include, but are not limited to: Any tree 15 inches in diameter or larger, as measured 24 inches above the natural ground level shall be considered a “Large Tree” for payment purposes. Any tree less than 15 inches in diameter, as measured 24 inches above natural ground level shall be considered a “Small Tree” All tree removal will be approved ; Materials to be used for geogrid reinforced base construction shall consist of virgin crushed stone, recycled Portland cement concrete, or a blend of recycled Portland cement concrete and Reclaimed Asphalt Pavement (RAP). This blend is not to exceed 50% RAP and shall be tested ; Asphalt cement shall be of uniform consistency, free from water to the extent that it will not foam when heated to three hundred fifty degrees (350°) F.