The Contractor shall notify the Forester of any subsurface conditions which will
affect the Contractor’s ability to complete the work, and shall locate and confirm
the locations of all underground utility lines and structures prior to starting any
excavation in the area to receive Structural Soil by calling New York City/Long
Island Call One Center, (800) 272-4480. The Contractor shall be liable to repair
any damage to underground utilities or structures caused by their activity during
the progress of this work, at their own expense. Where tree roots larger than one
inch (1") diameter are damaged , the Contractor shall ensure that damaged root
sections are cleanly cut with sterilized pruning equipment.