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must be completely surrounded with continuous rope or flagging <br />(heavy mil - minimum four inches (4") wide). All passive tree <br />protection must be accompanied by "Keep Out" or "Tree Save" <br />signage (Figure 3). <br />4. All tree protection zones should be designated as such with "Tree Save <br />Area" signs posted visibly on all sides of the fenced area. These signs <br />are intei ded to infomi subcontractors of the tree protection process. <br />Signs reqev'.ting subcontractor coopieration and compliance with tree <br />protection -.andards are recommended for site entrances. <br />5. All tree fencing barriers must be installed prior to and maintained <br />throughout building construction and should not be removed until <br />completion of construction and until landscaping is installed. <br />C. Encroachment. Most trees can tolerate only a small percentage of critical root <br />zone loss. If encroachment is anticipated within the critical root zones of <br />specimen trees, stands of trees, or otherwise designated tree protective zones, <br />the following preventive measures shall be employed: <br />1. Clearing Activities: Roots often fuse and tangle amongst trees. The <br />removal of trees adjacent to tree save areas can cause inadvertent <br />damage to the protected trees. Wherever possible, it is ad'dsable to cut <br />minimum two foot (2 ‘) trenches (e.g., with a "ditch-witch") along the <br />limits of land disturbances, so as to cut, rather than tear, roots. <br />Directionally felling trees outward into disturbance areas and grinding <br />stumps is also acceptable. <br />2. It is ver>' strongly suggested that all clearing in oak stands be done <br />before May 1st and after July 1st of each season. This will help to <br />prevent the inadvertent wounding of trees with the consequential <br />spread of oak wilt. If clearing has to be done at this time, all stumps <br />and wounded trees shall have the wound areas painted thoroughly <br />with a tree paint. To be effective, the painting shall be performed <br />within the same day of cutting. Should oak wilt get started as a result <br />of construction during the months of May and June, then the <br />developer/builder shall pay for all additional on-site oak wilt control <br />measures needed to control the disease. <br />3. Where the Zoning Administrator has determined that irreparable <br />damage has occurred to trees within tree protective zones, they must <br />be removed and replaced by the developer/builder as provided in <br />Section IV(B)9. <br />*