Item 23 - Fleet Electrification and Electric Vehicle Charging Master Plan

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potential site -level and distribution grid impacts of that additional load. To identify potential utility distribution electrical infrastrcture impacts, our team will first coordinate with SCE and MUS to review data that they already have on the capacity of existing distribution grid infrastructure to answer the following questions: • How large is the electrical service from the utility for each relevant facility? • How much electrical current is each facility consuming at existing peak power demand levels? • How much electrical capacity is remaining on the utility -side of the meter at existing peak power demand? • How much electrical capacity remains on the City's facility side of the meter? Responses to these questions will help us gather the needed data to conduct the electrical capacity analysis at each facility and to determine any potential impacts to the electric grid. With an understanding of peak power demand and the voltage of service drops at each facility, our team will estimate the maximum current used at each facility at peak power demand. This will then be subtracted from the size of existing electrical service to provide an estimate of how much electrical capacity is remaining on the utility -side of the meter. Our team will then compare that to the projected additional load from EV charging at each facility to determine whether each facility has sufficient utility -side capacity to accommodate chargers or if upgrades may be necessary. Aside from the information provided by the utility, our team will also use the data from the SCE's Distributed Resources Plan External Portal (DRPEP) to determine the load capacity for facilities that fall within the SCE's service territory. Facility -side Electrical Infrastrcture Assessment: After completing the distribution grid capacity analysis and utilizing information obtained from site visits, the ICF team will assess the existing electrical infrastructure at each of City facilities for its ability to support the proposed EV charging infrastructure. This evaluation will determine if the current infrastructure is adequate or if upgrades, such as panel upgrades or the installation of step-up/down transformers, are necessary. Should an upgrade be deemed necessary, the ICF team will document this requirement and proceed to evaluate the associated costs, ensuring a comprehensive understanding of the investment required. Additionally, the ICF team will explore the costs related to preparing each facility for the deployment of charging infrastructure, covering a broad spectrum of components crucial for the site's overall readiness. • Panel and Service Boards: Estimating costs for upgrading or installing new electrical panels and service boards to accommodate additional loads. • Step-up/Step-down Transformers: Evaluating the costs for installing transformers that are essential for converting electrical power from one voltage to another (to serve both Level 2 and DCFC chargers) —these transformers are crucial in scenarios where a switch between 208 volts (V) to 480 V or vice versa is needed to match the power requirements of the EV charging stations with the facility's existing electrical infrastructure. • Meters: Assessing the need and costs for new or upgraded metering systems to monitor electricity usage. • Conduit and Cable: Calculating the expenses for necessary conduit and cable installations to connect the charging stations. • Trenching: Determining the costs for trenching work required to lay down electrical lines underground. • Bollards: Evaluating the expenses for installing bollards to protect charging stations from accidental vehicular damage. • EV Signage and Striping: Assessing the costs for necessary signage and striping in parking areas to designate EV charging spots. • Permits: Estimating a high-level cost for obtaining any required permits for the installation and operation of charging stations. • Engineering Design: Assessing a high-level cost for professional engineering design services needed for the infrastructure setup. • Labor and Installation: Estimating the labor costs and expenses related to the installation of the entire charging infrastructure. Use or disclosure of data contained on this sheet is subject to the restriction on the title page of this proposal 13