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Project Description Griffith Energy Storage Project and a maximum of 20 feet, consistent with the San Joaquin County Grading Ordinance (San Joaquin County 2021). Additionally, no grading which may obstruct, impede, or interfere with the natural flow of storm waters would occur. The Project would include swales and armored outlets to direct stormwater, as shown in the preliminary grading and site plan provided as Figure 5. Fencing A perimeter security fence would be installed around the energy storage system facility. Trash would be removed from the fencing as required. A security fence would also be installed around the Project substation. Electrical Work A substation pad for the step-up transformer would be poured, followed by the installation of the medium- voltage stations, wiring of the modules through combiner boxes, and construction of the Project substation and grid interconnection. The medium-voltage stations would sit on concrete foundations or driven piles, pending final design. Construction Schedule and Workforce Construction is anticipated to begin in 2023 and last for a 12-month period through 2024. Hours Construction would occur primarily during daylight hours, and would not occur earlier than 6:00 a.m. or after 9:00 p.m. in compliance with the San Joaquin County Municipal Code (San Joaquin County 2021). Construction requirements may require some nighttime activity for material and equipment delivery and/or where the schedule has been delayed due to weather or other events. Nighttime activities would be performed with temporary lighting, which would be directed downward to minimize impacts to neighboring properties and wildlife in the Project vicinity. Workforce The on-site construction workforce would consist of laborers, craftspeople, supervisory personnel, and support personnel. The on-site assembly and construction workforce is expected to reach a peak of approximately 60 workers; the average number of workers on-site is anticipated to be approximately 10 to 60, depending on the construction activity, as shown in Table 1. Vehicles Construction vehicles would access the Project site from Interstate 580 and Midway Road. Vehicle use of area roadways resulting from Project construction activities would be limited to the 12-month construction period, as workers and materials are transported to and from the Project site. Construction workers would be encouraged to carpool in order to minimize vehicle trips. Typical equipment during construction would include scrapers, dozers, tractors, backhoes, excavators, and other common types of construction equipment. June 2022 5 Griffith Energy Storage, LLC