7. Tate_Ersgstetion. Trees shall be protected during the establishment period by the of the following measures: Y e <br /> 7.1 Installation of bark mulch in the drip line, which is the area directly below <br /> the tree's branches, 2-4 inches in depth and a minimum of 3 ft. x 3 ft. <br /> 7.2 No construction or human activity shall take place within the tree's critical <br /> root zone. <br /> 7.2.1 The critical root zone for trees 3" or smaller in caliper shall be an <br /> area with a radius of at least 3' from the trunk. <br /> 7.2.2 The critical root zone for trees over 3" in caliper shall be an area <br /> ith a radius of at least 1 from the trunk for every 1" of caliper size. <br /> .3 No soil grade changes shall take place within the critical root zone. <br /> .4 No storage of material shall be allowed within the critical root zone or <br /> area of the tree. <br /> .5 If construction or landscaping has not been completed on the abutting <br /> , the following conditions shall also . apply; <br /> 7.5.1 The critical root zone or tree protection zone shall have a protective <br /> fence installed at it's perimeter. <br /> 7.5.2 The . protective fence shall be at least 4' in height and made of <br /> orange plastic material or approved equivalent. <br /> 7.5.3 The protective fencing shall be installed prior to any <br /> construction/landscaping activity around the tree and be maintained in place during <br /> the construction/landscaping activities and removed only when the final <br /> construction is completed. <br /> R-7.280 -F Procedure for Planting and Establishment of Trees by City. <br /> 1. An applicant may enter into an agreement with the City wherein the City purchases, <br /> installs and establishes the street trees and the applicant pays to the City a fee e by the <br /> City Manager pursuant to section 2.020 of the Eugene Code, 1971, that is equal to the cost of the <br /> purchase, installation, and establishment of the required street trees. The fees shall be computed <br /> Administrative Order - 18 <br />