Specifications include, but are not limited to: Reasonable care shall be exercised during excavation, planting, filling, grading and cleanup to protect from damage all improvements, structures, and utilities. The contractor shall be responsible for repairing tire ruts and other damage to the existing lawn areas. Trees and shrubs will multiple leaders will be rejected. Trees that are damaged, have cut trunks, crooked leaders, abrasion of bark, sunscald, disfiguring knots, insect damage, disease, girdling roots, mold or premature opened buds are cause for rejection. Topsoil shall be natural, fertile soil from the uppermost soil horizon, and capable of sustaining vigorous plant growth. Soil shall be of uniform composition throughout, without admixture of subsoil, and free of stones, lumps, live plants and their roots, and other extraneous matter. Mulching material shall consist of aged or composted wood chips or shredded bark and shall be free of material injurious to plant growth.