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Prior to starting any tree work on an SAPRF tree, the Contractor must contact an authorized SAPRF representative. Contact Mike Lopez, Park Services Superintendent at 714/571-4212 Office or 714/231-6112 cell phone. 1.03 CERTIFIED ARBORIST The Contractor shall employee afull-time, permanently certified arborist, as accredited by the International Society of Arboriculture. This person is responsible for ensuring that the Contractor's crews are performing work according to SAPRF specifications. 1.04 SPECIFIC TREE PRUNING SPECIFICATIONS a. All persons performing tree work on SAPRF trees must be trained according to tree care standards accepted by the International Society of Arboriculture. b. All persons performing tree work on SAPRF trees in or around primary electrical lines must be trained to do so according to the "Electrical Safety Orders" of the State of California, including all amendments and revisions. When tree pruning cuts are made to a side limb, such remaining limb must possess a basal thickness of at least one third (1/3) of the diameter of the wound so affected. Such cuts shall be considered proper only when such remaining limb is vigorous enough to maintain adequate foliage to produce wood growth capable of callusing the pruning cut so affected within a reasonable amount of time. All final tree pruning cuts shall be made in such a manner so as to favor the earliest possible covering of the wound by natural callus growth. Flush cuts, which produce large wounds or weaken the tree at the cut, shall not be made. The branch collar shall not be removed. e. Tree limbs shall be removed and controlled in such a manner as to cause no damage to other parts of the tree, or to other plants or property. f. All tools used on a tree known to contain an infectious tree disease shall be properly disinfected immediately before and after completing work on such tree. All major diseases and/or pest problems shall be promptly reported to an authorized SAPRF representative. g. All cutting tools and saws used in tree pruning shall be kept sharpened to result in final cuts with smooth wood surface and secure bark remaining intact. All trees six (6) inches in diameter or less shall be pruned with hand tools only. Chain saws will not be permitted on any trees six (6) inches in diameter or less. This is to prevent any unnecessary abrasions to cambial tissue that may predispose a tree to insect and/or disease problems. Whenever pruning cuts are to be made, while removing limbs too large to hold securely in one hand during the cutting operation, the limbs shall be cut off first, one (1) to two (2) feet beyond the intended final cut. Then the final cut shall be made in a manner to prevent unnecessary tearing back of the bark and wood. Such cutting back shall not include the removal of any live, healthy limbs in excess of six (6) inches in diameter without prior approval from an authorized SAPRF representative. 53 25C-57