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b 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 shall survey activity sites for nesting raptors and passerine birds not more than 14 days prior to any ground-disturbing activity or vegetation removal Surveys shall include all line-of-sight trees within 500 feet (for raptors) and all vegetation (including bare ground) within 250 feet for all other species c Based on the results of the surveys, avoidance procedures shall 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 d 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 e 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 38 Mitigation Measure 4 C-1 b Pre-Construction Bat Surveys Prior to the issuance of a grading or building permit, a qualified biologists shall conduct a 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 39 Mitigation Measure 4 C-2 Riparian and Wetland Setbacks Consistent with the Alameda County Watercourse Protection Ordinance, no new grading or development shall be allowed within 20 feet of the edge of riparian vegetation or top of bank, whichever is further from the creek centerline, as delineated by a qualified, City-approved biologist 40 Mitigation Measure 4 D-1 b If the Irby home is approved to be demolished, prior to demolition, the structure shall be documented according to Historic American Building Survey (HABS) standards These standards include large format black and white photographs, an historical narrative describing the architectural and historical characteristics of the building, and measured drawings (or reproduced existing drawings if available) The NABS documentation shall be archived at the City of Pleasanton Planning Division 41 Mitigation Measure 4 D-2 Prior to the issuance of grading permits for development, the developer shall submit to the City an archaeological mitigation program that has been prepared by a licensed archaeologist with input from a Native American Representative The applicant shall implement the requirements and measures of this program, which will include, but not be limited to a Submission of periodic status reports to the City of Pleasanton and the NAHC PUD-110, Irby Ranch City Council Page 8 of 31