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3. Environmental Checklist San Leandro Treatment Wetland IS/MND 3-21 February 2024 between the existing basin and the solar array. To avoid any inadvertent impacts to these areas, Mitigation Measure BO-4 serves to further ensure avoidance of any impacts to sensitive natural communities. Impact Designation: Less than Significant with Mitigation Mitigation Measure BIO-4: Exclusionary Fencing and other Avoidance Measures. • Prior to initiation of construction activity, 48-inch silt exclusion fencing shall be installed by hand along the southern edge of the access road running on top of the levee between the basin and San Francisco Bay, as well as on either side of the access road where it crosses the culvert between the basin and the solar array. The purpose of the fencing is to protect habitat within the tidal channel from earthmoving activities or accidental spills, and to exclude workers from the channel. • Construction efforts involving the concrete vault box and outfall leading to the tidal slough shall occur during low tide to avoid the potential for turbidity impacts on potentially present special-status fish species. • To minimize turbidity impacts to special-status fish species that could be present in the tidal slough during startup and initial discharge of tertiary-treated effluent, a drainpipe sleeve or similar filtering device shall be installed at discharge point of the outfall structure until turbidity levels stabilize. • Prior to construction, all construction workers shall take part in a worker environmental awareness program conducted by a qualified biologist. The awareness program will be conducted at the start of construction and thereafter as required for new construction personnel. Personnel shall be instructed to avoid areas beyond the exclusionary fencing and any other precautions intended to ensure avoidance pursuant to Mitigation Measure BIO-1 through BIO-3. • Vehicle speed limits on the Project site shall not exceed 10 miles per hour. c) Impacts to protected wetlands: Wetlands fall under the jurisdiction of the U.S. Army Corps of Engineers (Corps) and RWQCB under Sections 404 and 401 of the Clean Water Act, respectively. A preliminary delineation of waters of the U.S. was performed in April 2020 by LSA (Appendix D, Request for Verification of Jurisdictional Delineation) and verified by the Corps on December 16, 2020 (Appendix E, U.S. Army Corps of Engineers Approved Jurisdictional Delineation). The Corps excluded the basin as a water of the US and identified 0.13 acres of wetlands and 2.26 acres of mudflats within the delineation study area. The wetlands and mudflats are adjacent to the tidal slough, which is excluded from the construction area. CDFW is responsible for conserving, protecting, and managing California biological resources, and Fish and Game Code Section 1602 requires an entity to notify CDFW of any proposed activity that may substantially modify a river, stream, or lake and to prepare a SAA if CDFW determines the activity may substantially adversely affect fish and wildlife resources. Based on discussions to date, CDFW considers tidal sloughs within the jurisdiction of Section 1600 of the Code where that slough is