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Significant Impact Impact 4.3-3: Project construction could disturb a maternity colony of bats and roosting special-status bats on the project site, resulting in the loss of individual bats or the abandonment of an active maternity colony. Finding Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid the significant effects on the environment. Facts in Support of Finding The City of Pleasanton has adopted the following measures which will reduce potential impacts to bats to a less-than-significant level: Mitigation Measure 4.3-3: The implementation of the following measures would ensure that maternity colonies of bats and roosting pallid bats and Townsend's big-eared bats would not be disturbed. a. A qualified biologist, knowledgeable about local bat species and experienced with bat survey methods, shall inspect all structures and trees that could support bats in the project area prior to the start of site disturbance(e.g. demolition, vegetation removal and earthwork). Surveys should be conducted during appropriate weather to detect bats(not in high winds or during heavy rain events). One daytime and up to two nighttime surveys(starting at least 1 hour prior to dusk) should be conducted to determine if bats are present. If bats are detected,additional surveys utilizing acoustic monitoring or other methods may be necessary depending on the recommendations of the bat biologist. b. Preconstruction surveys for bats should be conducted within two weeks prior to the removal of any trees or structures that are deemed to have potential bat roosting habitat. If bats are detected on-site and would be impacted by the project,then appropriate measures would be developed through City consultation with the CDFW. Mitigation measures would include one or more of the following methods: using one-way doors to exclude non-breeding bats, opening up roof areas of structures to allow airflow that would deter bats from roosting, and taking individual trees down in sections to encourage bats to relocate to another roost site. Typically this work is conducted in the evening when bats are more active, and this work should be conducted under the guidance of an experienced bat biologist. c. Mitigation for impacts to a maternity bat roost, if detected, would be determined through consultation with CDFW and may include construction of structures that provide suitable bat roosting habitat(i.e. bat houses, bat condos) for the particular specie(s) impacted. Significant Impact Impact 4.3-4: Project construction could adversely affect raptor and/or other migratory bird nesting activity on the project site, result in the loss of individual birds, eggs or nestlings, or the abandonment of active nests. Project construction could also result in the loss of occupied burrowing owl habitat if burrowing owls or signs of owls are observed within the project development area. Finding Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid the significant effects on the environment. LUND RANCI'I I1(PU D-25)RESIDENTIAL PROJECT 7 FINDINGS