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Prior to starting any tree work on an SAPRF tree, the Contractor must contact an authorized <br />SAPRF representative. Contact Mike Lopez, Sr. Park Services Supervisor at (714)571-4212 <br />Office or (714) 231-6112 cell phone. <br />1.03 CERTIFIED ARBORIST <br />The Contractor shall employee a full-time, permanently certified arborist, as accredited by the <br />International Society of Arboriculture. This person is responsible for ensuring that the <br />Contractor's crews are performing work according to SAPRF specifications. <br />1.04 SPECIFIC TREE PRUNING SPECIFICATIONS <br />a. All persons performing tree work on SAPRF trees must be trained according to tree care <br />standards accepted by the International Society of Arboriculture. <br />b. All persons performing tree work on SAPRF trees in or around primary electrical lines <br />must be trained to do so according to the "Electrical Safety Orders" of the State of <br />California, including all amendments and revisions. <br />c. When tree pruning cuts are made to a side limb, such remaining limb must possess a basal <br />thickness of at least one third (1/3) of the diameter of the wound so affected. Such cuts <br />shall be considered proper only when such remaining limb is vigorous enough to maintain <br />adequate foliage to produce wood growth capable of callusing the pruning cut so affected <br />within a reasonable amount of time. <br />d. All final tree pruning cuts shall be made in such a manner so as to favor the earliest <br />possible covering of the wound by natural callus growth. Flush cuts, which produce large <br />wounds or weaken the tree at the cut, shall not be made. The branch collar shall not be <br />removed. <br />e. Tree limbs shall be removed and controlled in such a manner as to cause no damage to <br />other parts of the tree, or to other plants or property. <br />f. All tools used on a tree known to contain an infectious tree disease shall be properly <br />disinfected immediately before and after completing work on such tree. All major diseases <br />and/or pest problems shall be promptly reported to an authorized SAPRF representative. <br />g. All cutting tools and saws used in tree pruning shall be kept sharpened to result in final <br />cuts with smooth wood surface and secure bark remaining intact. All trees six (6) inches <br />in diameter or less shall be pruned with hand tools only. Chain saws will not be permitted <br />on any trees six (6) inches in diameter or less. This is to prevent any unnecessary <br />abrasions to cambial tissue that may predispose a tree to insect and/or disease problems. <br />h. Whenever pruning cuts are to be made, while removing limbs too large to hold securely in <br />one hand during the cutting operation, the limbs shall be cut off first, one (1) to two (2) <br />feet beyond the intended final cut. Then the final cut shall be made in a manner to prevent <br />unnecessary tearing back of the bark and wood. Such cutting back shall not include the <br />removal of any live, healthy limbs in excess of six (6) inches in diameter without prior <br />approval from an authorized SAPRF representative. <br />47 <br />19C-50