Guidelines for Trees to be retained Clause Samples

Guidelines for Trees to be retained a) All retained trees should be clearly identified “TO BE RETAINED” and information signs should be displayed on site in prominent positions at each entrance; b) All retained trees shall be marked by visible, durable tags, lettered to tree number or symbol (if any) on the drawings. c) Trees should be fenced off the works area if possible, in all cases tree trunk and roots should be protected from site works; d) Protected area should be in a shape of a circle around each tree with radius of 3m, measured from tree trunk. e) Do not allow for soil compaction under the tree; f) Do not store any materials or site equipment under or near the trees. g) Do not allow for any vehicles to be parked near retained trees or to pass under the trees; h) Prevent damage to tree bark; do not attach any items to trees. i) Do not expose tree roots; j) When works under the tree: - Do not add or remove topsoil within the drip line of trees, do not fill against tree trunks even temporarily; - Open excavation under tree canopy should be carried for as short period as possible. If exposing roots unnecessary temporarily line with polyethylene sheet to reduce evaporation; - Use only hand methods to locate, expose, and cleanly remove the soil around roots on the line of excavation. Root systems should be preserved intact. - When it is necessary to cut the roots bigger than 25mm diameter, make sure the cutting does not disturb remaining root system. Cut should be smooth with no ragged edges. Clean cut surface should be immediately treated with bituminous fungicidal sealant.‌