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EXHIBIT A-SCOPE OF SERVICES City, and to the extent possible, these requirements will be incorporated into modeling assumptions and approach. Subtask 3.5- Model Calibration. Woodard &Curran will run the model under existing conditions and compare the computed dry weather and wet weather flow hydrographs to observed flow monitoring data and pump station SCADA data. Model flow parameters, including base wastewater flow unit factors, diurnal curves, and Ill parameters will be adjusted as needed to achieve a reasonable match for modeled to metered flows. Subtask 3.6— Model Development TM. Woodard & Curran will prepare a draft TM to document the model development and calibration, including the basis for existing and future flows used in the model. The draft TM will be prepared and submitted prior to the model acceptance workshop under Subtask 3.7. Comments received from the City and at the workshop will be incorporated into the final TM. Subtask 3.7— Model Acceptance. Woodard & Curran will conduct a workshop with City staff to present the model development and calibration results. A demonstration of the model will be provided, including how the model will be used for the capacity evaluation and other modeling investigations. Task 3 Deliverables: • Database of existing and future land uses and model loads. • Model calibration graphs. • Draft and final Model Development TM • Model workshop presentation materials. • Calibrated hydraulic model for the sewer system (model files plus data exported to GIS and/or Excel tables), to be provided at project completion. Assumptions: • Woodard & Curran will use its own model software licenses for the work under this project • City staff will provide record drawings and assistance with field verification if needed to obtain or confirm data for critical facilities included within the model Task 4—Capacity Evaluation and Proposed Remedies This task involves evaluation of collection system capacity and identification of specific improvement needs to address any deficiencies. Subtask 4.1 — Develop Design Storm and Hydraulic Criteria. Woodard &Curran will work with the City to develop the appropriate design storm and hydraulic criteria to be used for assessing the capacity of existing sewer facilities and sizing new facilities. In addition to the design storm, these criteria will include Manning's"n"factors; maximum d/D values or acceptable level of surcharge (or minimum freeboard); minimum and maximum velocities, slopes, and depth of cover; and pump station design and reliability considerations (e.g., firm capacity). Preliminary model runs will be conducted to assess the potential implications (in terms of length of surcharged sewers or sewers exceeding various surcharge levels) to inform decisions on appropriate design storm and capacity criteria to use for the capacity evaluation. A TM will be prepared to provide background information and recommendations for the City to review and serve as basis for discussion. Subtask 4.2— Design Standards Review. Woodard &Curran will review the City's 1984 Design Guide and existing standard specifications that define the requirements and criteria for sewer facility design and Woodard &Curran -5- 12/20/21