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(f) <br />(g) <br />Trees that are planted in parkways shall have a 4"-6" high water retention <br />basin built around the tree capable of holding at least ten against the edge of <br />the concrete to create a sloping basin. Immediately after planting, the tree <br />shall be watered thoroughly by filling the water retention basin twice. <br />All trees shall be staked with two wooded lodge poles and two ties per pole. <br />Minimum size of lodge poles shall be ten (10') feet long, with a one and a <br />half (1'/2") inch diameter. Tree ties shall be placed at one third (1/3) and two- <br />thirds (2/3) of the trunk height and installed in a figure 8 pattern form trunk <br />to stake. Stakes shall not penetrate the root ball <br />and shall be driven into the ground approximately twenty-four to <br />thirty (24"-30") inches below grade. <br />(h) Trunk protectors such as Arbor -Guards or an approved equal shall be placed <br />at the base of the trunk of all new trees immediately after planting. <br />(i) <br />In some cases, root barriers may be required. The City will make this <br />determination. Should a root barrier be required, the Contractor will install a <br />mechanical barrier that redirects root growth downward, eliminating the <br />surface rooting that damages expensive hardscapes and creates a hazard. The <br />barrier shall be twelve (12") inches in depth and at a length determined by the <br />City and placed in a circular fashion surrounding the trees' root system. Root <br />barriers are an additional service and cost. <br />(j) Contractor shall clean up all trash and any soil or dirt spilled on any paved <br />surface at the end of each planting location and episode. <br />(k) All trees shall be of good nursery stock that adheres to the American Standard <br />for Nursery Stock as described in the ANSI Z-60.1 Standards. Trees shall be <br />free from pests, disease, and structural defects. <br />G. Crew Rental <br />The standard crew is three men, one chipper truck, one chipper, one aerial <br />tower and all necessary hand tools. The crew and equipment can be modified <br />to complete any type of miscellaneous tasks including special projects. Trees <br />requiring service prior to their regularly scheduled grid or annual trim to rectify <br />a specific problem such as blocked street lighting or signs, right-of-way <br />clearance for utility lines, or broken limbs may be performed under the Crew <br />Rental rate. <br />14 <br />I:\cmo\Agreements\West Coast Arboiists, Inc. Agreement for Improvement to Public Grounds (Tree Maintenance) FY23-0026.docx-ms <br />