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Biological Resources Evaluation Report Griffith Energy Project METHODS4 FIELD SURVEY A general biological survey was conducted on January 11 and 12, 2022. The field survey was conducted during daylight hours and not during abnormal or excessive cold, heat, wind, rain, or other inclement weather.The survey was conducted on foot and by vehicle.An Eos Arrow 100 sub-meter Global Positioning System (GPS) unit and a paired tablet running the ArcGIS Field Maps application were used to collect location and attribute data of features or species encountered. Photographs that were taken are provided in Appendix A. 4.1 Inventory of Plants and Wildlife The BSA was surveyed for special-status plant species and their habitats. Signs of wildlife, such as tracks, burrows, dens, nests, nest sites, scat, or remains were also surveyed for. Wildlife species encountered visually or audibly during the survey and wildlife sign were identified and recorded. 4.2 Vegetation Mapping Vegetation communities were mapped in accordance with the Manual of California Vegetation, Second Edition(Sawyer et al.2009).Vegetation was mapped to the alliance level,which is defined by plant species composition and identified by the most dominant tree, shrub, or herb in the vegetation community. 4.3 Jurisdictional Wetland Delineation A jurisdictional delineation was performed within the Project site. The delineation was conducted at any potential jurisdictional wetlands and Waters of the U.S. and State, and areas potentially under CDFW jurisdiction. The U.S. Army Corps of Engineers (USACE) has developed standard methods and data reporting forms contained in the Interim Regional Supplement to the Corps of Engineering Wetland Delineation Manual: Arid West Region (USACE 2008), a supplement to the Corps of Engineers Wetland Delineation Manual(Environmental Laboratory 1987), to determine the presence or absence of wetlands and Waters of the U.S. The USACE methodology was used to identify wetlands and Waters of the U.S. in the Project site that are potentially subject to regulation under Section 404 of the Clean Water Act. This delineation methodology was also used to evaluate potential Waters of the State under Regional Water Quality Control Board (RWQCB)jurisdiction. "Waters of the State" are defined by the Porter-Cologne Act as "any surface water or groundwater, including saline waters, within the boundaries of the state" (State Water Resources Control Board [SWRCB]2019).These may include intermittent or ephemeral waters.The SWRCB and each RWQCB regulate activities in Waters of the State which include Waters of the U.S.Areas of CDFW jurisdiction were determined by the presence of a defined bed, bank, and channel, or presence of a lake or pool, and were measured to the top of bank or the edge of riparian vegetation. Sample points were taken to determine areas of potential jurisdiction and were mapped in the field using a GPS receiver with sub-meter accuracy. Field indicators were examined, and wetland data reporting forms were used to record three parameters: hydrophytic vegetation,wetland hydrology, and hydric soils. Sample points were collected for each potential jurisdictional feature when a change in any of the three wetland parameters occurred. Sample points were also collected within the feature and in associated upland to compare these areas and determine the extent of the feature. Photographs taken during the field survey are provided in Appendix A. Completed wetland data forms are provided in Appendix B. Tetra Tech, Inc. 4-1 July 2023