ITEM 23 ATTACHMENT 1 - CEQA Checklist

City of Pleasanton—Merritt Property Project 15183 Consistency Checklist Consistency Checklist 133 obstruct implementation of a water quality control plan or sustainable groundwater management plan and impacts would be less than significant. Proposed Project Analysis and Conclusion During project site grading and other construction activities, on-site soil would be exposed, potentially leading to higher risks of erosion and siltation. This could have potential impacts to the existing drainage patterns at the project site, as well as the water quality if eroded soil enters nearby water systems. The proposed project would result in 883,520 square feet of impervious surface upon project completion. The increase in impervious surfaces at the project site, from the 10,818 square feet that currently exist, could have potential impacts to the existing drainage patterns at the project site, resulting in impacts related to erosion/siltation, surface runoff, stormwater drainage capacity, polluted runoff, or flood flows. According to the FEMA Flood Insurance Rate Map (FIRM) applicable to the proposed project, a majority of the project site is mapped within an area of minimal flood hazard.22 However, a portion of the eastern part of the project site is within the 500-year floodplain; additionally a small portion of the southwest corner is mapped within the 100-year floodplain.23 The project site is not in the vicinity of the ocean or other large body of water. The project site is within the Livermore Valley Groundwater Basin (Basin), which is classified as a medium-priority basin. The Sustainable Groundwater Management Act (SGMA) empowers local agencies to form Groundwater Sustainability Agencies (GSAs), whose purpose are to manage basin sustainability though the development and implementation of Groundwater Sustainability Plans (GSPs). A GSA can submit an Alternative GSP if it is able to demonstrate that it has been operating the basin within its Sustainable Yield for at least 10 years. The Alameda County Flood Control and Water Conservation District, Zone 7 (Zone 7) is the responsible GSA for the Basin. Zone 7 submitted the GSP for the Basin. The proposed project would be implemented in compliance with the sustainability goals provided in the Alternative GSP for the Basin. The proposed project would include construction activities that would disturb one or more acres of land surface; therefore, the project would be required 22 Federal Emergency Management Agency (FEMA). 2009. Flood Insurance Rate Map, Panel 316 of 608, Map Number 06001C0316G. Effective Date August 3, 2009. National Flood Insurance Program. Map. Scale 1:6,000. 23 Ibid.