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AUGUSTIN BERNAL MOUNTAIN BIKE TRAIL PROJECT DRAFT INITIAL STUDY • The "project site" refers to the area that would be physically affected by trail construction and improvement activities(including temporary disturbance).The project site also includes all staging areas. • The "biological study area" includes the project site and adjacent lands in which indirect impacts on biological resources could occur, including disturbance from construction-related noise, vibration,and lighting. Methodolow Literature Review Special-status plant and wildlife species present or potentially present in the biological study area were identified through a literature search using the California Department of Fish and Wildlife's (CDFW) California Natural Diversity Database (CNDDB) (CDFW 2021a) and the California Native Plant Society's Inventory of Rare and Endangered Vascular Plants of California (CNPS 2021a). Searches of the above- referenced databases were completed for the Dublin, Hayward, La Costa Valley, Livermore, and Niles U.S. Geological Survey 7.5-minute quadrangles. Following a review of these resources, Dudek determined the potential for each species to occur within the biological study area based on a review of vegetation communities and available land cover types, habitat types,soils,and elevation preferences,as well as the known geographic range of each species. Dudek also reviewed current and historical aerial photography in Google Earth to identify any potentially jurisdictional aquatic resources or species habitat features (e.g., ponds) based on aerial and topographic signatures. For the purposes of this initial study,special-status species are defined as follows: • Plants, fish, or wildlife listed, proposed for listing, or candidates for listing as threatened or endangered under Federal Endangered Species Act(FESA)(16 USC 1531 et seq.) • Plants, fish, or wildlife listed as threatened or endangered, or proposed for listing, under the California Endangered Species Act(CESA)(California Fish and Game Code,Section 2050 et seq.) • Fish or wildlife designated by CDFW as a California Species of Special Concern • Wildlife designated as fully protected species under Sections 3511, 4700, 5050, and 5515 the California Fish and Game Code • Wildlife on CDFW's Special Animals List(CDFW 2021b) • Plants designated as rare under the California Native Plant Protection Act of 1977 • Plants with a California Rare Plant Rank of 1 or 2 • Rare,threatened,or endangered as described in the CEQA Guidelines,Section 15380 To identify "established native resident or migratory wildlife movement corridors"that could be impacted by the project(i.e.,part d of the biological resources checklist in Appendix G to the CEQA Guidelines),Dudek biologists reviewed the Critical Linkages: Bay Area and Beyond report(Penrod et al. 2013)and applicable datasets(CDFW 2021c, 2021d) in CDFW's BIOS viewer(Version 5.89.14c). 12956 DUDEK 28 April 2022