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4 Environmental Analysis 4.15 Transportation (construction equipment, aggregate, concrete, fencing, cables and electrical equipment, etc.) are assumed to be found locally and split 50 percent from Oakland and 50 percent from Stockton. Workers could reside in any number of local communities or hotels. Due to the proximity of the City of Tracy and good availability of hotels and lodging there, it is likely many workers will stay there. The other closest residential locations to the Project are the hotels in Ulmar, Livermore, and Pleasanton. Additional nearby communities include Verona, Asco, Dublin, Lathrop, and Manteca. The nearest large urban areas are Tracy (9 miles, 18 minutes) and Ulmar (12 miles, 18 minutes). Because both are close in proximity, both will be included in analysis as possible commuting locations. Because so many local communities exist, the analysis did not consider all possible locations. It has been simplified to be representative and conservative. The communities in addition to Tracy and Ulmar that are included are Dublin (25 miles, 28 minutes) and Manteca (27 miles, 40 minutes). An estimated 40 percent of workers are estimated to come from Tracy, 30 percent from Ulmar, 15 percent from Dublin, and 15 percent from Manteca). See Table 2-2, Construction Equipment and Vehicle Trips Per Phase, in Chapter 2, Project Description, for total worker, vendor, and hauler trips. Peak hours for the Project are expected to be between 7:00 a.m. and 8:00 a.m. and 5:00 p.m. and 6:00 p.m., when construction workers would commute to and from the site. Once constructed, the Project would operate 7 days per week and 365 days per year. The facility would be operated by the Applicant or an affiliated company remotely. Periodic augmentation of batteries within the Project site may occur. Only occasion, on-site maintenance is expected to be required following commissioning, including replacement of inverter power modules, filters, and miscellaneous electrical repairs on an as-needed basis. No permanent sanitary facilities would be required. Trip generation for decommissioning is conservatively assumed to be similar to Project construction. Vehicle Miles Traveled CEQA Guidelines Section 15064.3(b) was adopted in December 2018 by the California Natural Resources Agency. These revisions to the CEQA Guidelines criteria focus the analysis of traffic impacts from driver delay to reduction of greenhouse gas (GHG) emissions, creation of multimodal networks, and diversity of land uses. The revisions required lead agencies to evaluate transportation impacts based on VMT beginning July 1, 2020. VMT is a measure of the total number of miles driven to or from a project and is sometimes expressed as an average per trip or per person. San Joaquin County has not yet adopted VMT-based transportation significance thresholds; however, Alameda County adopted VMT thresholds in March 2023. Where no VMT threshold has yet been adopted, the Office of Planning and Research's Technical Advisory on Evaluating Transportation Impacts in CEQA (OPR 2018) provides guidance: The VMT metric can support the three statutory goals: "the reduction of greenhouse gas emissions, the development of multimodal transportation networks, and a diversity of land uses." (Pub. Resources Code, § 21099, subd. (b)(1), emphasis added.) However, in order for it to promote and support all three, lead agencies should select a significance threshold that aligns with state law on all three. State law concerning the development of multimodal transportation networks and diversity of land uses requires planning for and prioritizing increases Griffith Energy Storage Project 4.15-13 Tetra Tech/SCH 2022120675 Draft Environmental Impact Report August 2023