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515 S. Flower Street T 800.426.4262 18" Floor Los Angeles,California 90071 www.woodai-dcurran.com Via Electronic Mail February 10, 2025 Jaime Arias Civil Engineer Woodard City of Santa Ana & Curran Public Works Agency—Water Resources Division 215 Center Street Santa Ana, CA 92704 Re: On-Call Sewer Hydraulic Modeling Scope of Services Dear Mr. Arias: Woodard &Curran, Inc. (Woodard &Curran) is pleased to continue services providing hydraulic modeling support to the City of Santa Ana (City) for tasks related to capacity planning for the City's wastewater collection system. Please see the description of scope of services below. SCOPE OF SERVICES Task 1 - Project Management and Coordination Woodard & Curran will monitor project budget, prepare invoices, and communicate with the City by telephone and e-mail regarding project status and issues. A one-year contract period is assumed. Woodard & Curran will track costs under a separate subtask for each model evaluation associated with a developer project so that the City can determine appropriate costs to be charged to developer. Assumptions • Any required meetings are assumed to be included as part of the model evaluations under Task 1. Task X- Model Evaluations Under this task, Woodard & Curran will run the model (or expand the model to include previously unmodeled sewers) as requested by the City to: 1. Assess the impact on sewer capacity of proposed development projects and determine where additional capacity would be required (e.g., increased pipe size or larger pump station capacity) if needed to handle increased flows caused by the new developments; 2. Evaluate "what-if" scenarios related to proposed new or improved sewer pipelines or pump stations; or 3. Update the model and capacity assessment based on permanent changes in the sewer system.