2026-043-E-AMS-ICF Incorporated-EV Charger Study

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Electric Vehicle Transition Plan & Charging Infrastructure Evaluation for County Fleet Price Proposal RFQ 367-OC5463 December 23, 2025 Use or disclosure of data contained on this sheet is subject to the restrictions on the title page of this proposal 11 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. For priority facilities, ICF will gather data to understand the size and location of transformers, amount of existing capacity on them, as well as any practical challenges related to charger installation like long trenching distances or insufficient parking near existing transformers. This effort with the utility will be used to update the charger installation timeline to include necessary upgrades on the part of the utility and incorporate that effort into the lead time for each site. It will also be used to update the cost estimates for each site with utility-specific information on the costs of the typical upgrades which we already have in our pricing model. These price estimates are based on industry experience and work with various utilities across the country but can be further refined to take advantage of cost data provided by Duke Energy Progress & Piedmont Electric Coop in order to ensure they align with what will be required of the County. Facility-side Electrical Infrastructure Assessment: After completing the distribution grid capacity analysis, the ICF team will assess the existing electrical infrastructure at each of County 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 documen t 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, including: • Point-of-Service: Identifying which point-of-service chargers will connect to in order to identify the deficiencies in existing infrastructure for both County and utility infrastructure. • 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. Docusign Envelope ID: 2559C90D-4549-45D0-8554-7958990EE7B9