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would be maintained by the applicant for five years after installation and/or until the planting is accepted by the Director of Parks and Community Services. Much discussion has occurred with the applicant regarding the species and size distribution of the replacement trees. Traditionally staff has recommended a combination of 15-gallon and 24-inch box-size trees as replacement for the removable of a single tree or a small number of trees on small areas. However, for the reforestation of large areas, the City has supported the use of a wider range of tree sizes including 24-inch box-size, 15-gallon size, 5-gallon size, and TreePot size - a fl- inch by 14-inch deep container -trees with the ratio of tree sizes determined with the review of the mitigation monitoring plan. Therefore, staff recommends deferring the revegetation plan which will determine the replacement species and the ratio of sizes to the review of the first Final Subdivision Map also subject to the review and approval by the Planning Director. To mitigate the potential significant impacts on the blue oak woodland community and heritage trees from the site preparation and development activity, the applicant is required to prepare and submit a Blue Oak Woodland/Heritage Tree Mitigation Plan to the Planning Director for review and approval before the City Council's action on the first Final Subdivision Map. The plans are required to include an updated tree analysis based on the "Tree Report For The Kottinger Hills Subdivision, Pleasanton, California", prepared by Ralph Osterling Consultants and to implement the applicable provisions specified in Pleasanton's Tree Preservation Ordinance, and to include the following: ^ A map based upon the final subdivision design showing the tree locations superimposed over the lotting plan and grading plan including all cut/fill areas showing the trees to remain, to be removed, and the trees that may be impacted by grading. ^ A listing of every tree covered in the above-stated map stating its species, caliper, health, significance, and valuation. ^ The 10-foot grading setback lines from the canopy areas of the trees to be preserved and the trees that may be impacted from development that will also function of the fence lines to protect these trees. ^ The type of fencing that will be used to fence the trees; and, ^ Statements addressing tree protection. At the discretion of the Planning Director, the information contained in the Blue Oak Woodland and Heritage Tree Plans can be combined into a single plan. Geotechnical Issues The proposed project includes residential development in a rugged, undeveloped area of relatively steep slopes with narrow elongated ridges and intervening creek valleys. PUD-33 Page 34 of 59 June 13, 2007