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Jenny Soo May 8,2015 Page 6 • Pruning and removal of trees and other vegetation, including grading of grasslands, should occur whenever feasible,outside the breeding season (February 1 through August 31). During the breeding bird season (February 1 through August 31), a qualified biologist will survey activity sites for nesting raptors and passerine birds not more than 14 days prior to any ground-disturbing activity or vegetation removal. Surveys will include all line-of-sight trees within 500 feet(for raptors)and all vegetation (including bare ground)within 250 feet for all other species. • Based on the results of the surveys,avoidance procedures will be adopted, if necessary, on a case-by-case basis. These may include construction buffer areas(up to several hundred feet in the case of raptors)or seasonal avoidance. • Bird nests initiated during construction are presumed to be unaffected,and no buffer would be necessary,except to avoid direct destruction of a nest or mortality of nestlings. • If preconstruction surveys indicate that nests are inactive or potential habitat is unoccupied during the construction period, no further mitigation is required. Trees and shrubs that have been determined to be unoccupied by nesting or other special- status birds may be pruned or removed. Mitigation Measure 4.0-lb:Pre-Construction Bat Surveys. Conditions of approval for building and grading permits issued for demolition and construction [of the project] shall include a requirement for pre-construction special-status bat surveys when large trees are to be removed or underutilized or vacant buildings are to be demolished. If active day or night roosts are found,the bat biologist shall take actions to make such roosts unsuitable habitat prior to tree removal or building demolition. A no-disturbance buffer of 100 feet shall be created around active bat roosts being used for maternity or hibernation purposes. Bat roosts initiated during construction are presumed to be unaffected, and no buffer would be necessary. Similar to the 2014 project,the 2015 project would require the removal of trees and other vegetation that may be occupied by nesting or other special-status birds. The existing onsite commercial office building to be demolished could provide habitat for special-status bat species. However, implementation of Mitigation Measure 4.0-la and 4.0-lb from the Supplemental EIR would ensure that any impacts to special-status bird and bat species are avoided or minimized to a level of less than significant. Similar to the 2014 project,the 2015 project would preserve many of the existing trees located along the project site's boundaries. The 2015 project would result in the removal of 64 trees,five more than would have been removed under the 2014 project. These five additional trees are considered heritage trees in accordance with Chapter 17.16 of the Pleasanton Municipal Code. Similar to the 2014 project, the 2015 project would include a heritage tree removal permit and the planting of additional trees to offset the removal of heritage trees and other onsite mature vegetation, consistent with Chapter 17.16 of the Pleasanton Municipal Code(Tree Preservation Ordnance). As such, biological resource impacts related to the 2015 project would continue to be less than significant.