Specifications include, but are not limited to: 1.1 - Demolition and Removal: This work shall consist of demolishing, removing, and disposing of all structures and improvements within the construction limits unless included in Special Provisions. This work shall apply to all structures and improvements, whether on, above or below the surface of the ground or sub-grade. Demolition and removal shall include but not be limited to items such as buildings, drainage structures, pipes, pavements, fences and retaining walls located on private property. 1.2 - Trees: Vegetable growth 6 inches (15.24cm) in diameter and larger, measured 3 feet (91.44cm) above ground shall be classified as a tree. 1.3 - Brush: Vegetable growth less than 6 inches (15.24cm) in diameter, measured 3 feet (91.44cm) above ground shall be classified as brush. 1.4 - Embankment or backfill is defined as the placing and compacting of material in the construction area to the lines and grades approved by the City Inspector. 1. Unsuitable material is defined as muck, frozen material, organic material, topsoil, rubbish, and rock with a maximum dimension greater than 24 inches (60.96cm). 2. Suitable material is defined as entirely imperishable with that portion passing the No. 40 (425mm) Sieve having a liquid limit not exceeding 40 and a plastic index not exceeding 25, when tested in accordance with ASTM D-423 and D-424, respectively. 1.5 - Rock Embankment: Material for rock embankment shall be free of unsuitable material and shall contain, by volume, greater than 10 percent rock or gravel having a maximum dimension greater than 3 inches(7.62cm) but not greater than 24 inches (60.96cm). 1.6 - Earth Embankment: Material for earth embankment shall be free of unsuitable material and shall, contain by volume, less than 10 percent rock or gravel having a maximum dimension greater than 3 inches (7.62cm). 1.7 - Structures as used herein refer to bridges, culverts, storm sewer and/or sanitary appurtenances, retaining walls and similar construction.