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Required Measure Implementation Timing <br />Responsible for <br />Ensuring Compliance / <br />Verification <br />Date <br />Completed <br />and Initials <br />clean cuts. No pruning paint or sealants shall be used. <br /> Any grade changes near the preserved trees or pruning of trees to provide clearances for <br />construction equipment shall be coordinated with a Registered Consulting Arborist before <br />construction begins, and precautions pursuant to the arborist’s recommendations shall be taken <br />to mitigate potential tree injuries. <br /> Prior to construction, a one-pound soil sample shall be taken from the top 18-inches of soil in <br />each area where trees will be preserved. The samples shall be sent to an appropriate <br />laboratory for analysis and soil supplement recommendations. Fertilization of the preserved <br />trees shall be completed pursuant to the laboratory analysis’ soil supplement <br />recommendations. <br /> Prior to construction, augur 6-inch diameter holes about 3 feet deep at a 3-foot spacing <br />between large roots in the more compacted and crowded spaces. Avoid large visible roots, <br />relocating the holes as needed. Start augur holes at three times the trunk diameter, i.e. 6-feet <br />from a 24-inch tree. Back fill with amended soil, based on an agronomic lab’s testing and <br />recommendations. <br /> Prior to construction, mulch all exposed soil areas using a topical application of a well - <br />composted, coarse-texture mulch, without manure or bio-solids, e.g. Aguinaga Forest Floor ½ <br />to 1½” particle size. Apply it 2-inches deep, but not against the tree trunks. <br /> Deep water before construction and check soil moisture monthly during construction by means <br />of a soil test probe. Slow water with a soaker hose or water spike for 12 hours, or as long as <br />necessary to reach 4-feet deep. <br /> Rinse tree foliage at the end of each work week, using a strong stream of water from a high- <br />pressure nozzle. <br /> During construction in areas without pavement near the preserved trees, 3 or more inches of <br />coarse mulch or tree chips under 1-inch plywood for light vehicle parking and steel plates for <br />larger vehicles is required to prevent compaction and protect surface roots. <br /> Protection Barrier: A protection barrier shall be installed around the trees to be preserved. The <br />barrier shall be constructed of durable fencing material, such as chain link fencing. The barrier <br />shall be placed as far from the base of the tree(s) as possible and shall be maintained in good <br />repair throughout the duration of construction, and shall not be removed, relocated, or <br />encroached upon without permission of the project arborist. <br />o Storage of Materials: There shall be NO storage of materials or supplies of any kind within <br />the area of the protection barriers. Concrete and cement materials, block, stone, sand and <br />soil shall not be placed within the drip-line of the tree. <br />2-109