Professional Services Agreement - Arcadis US - WWTP Stress Testing Evaluation

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i. Current average flow condition with normal units in service ii. Permitted 77 mgd peak flow condition with nonnal units in service iii. Maximum peak flow condition (based on current facilities, process and hydraulic capacity) with normal units in service iv. Maximum peak flow condition with aeration tank out of service V. Maximum peak flow condition with units out of service 6. Roadmap for Regulatory Coordination and Approval a. Develop a roadmap for the Client to follow to coordinate and gain approval from IDEM as may be desired pending the maximum peak flow identified in the above tasks. This will include a step -wise implementation plan to increase the plant peak flow from today's permitted peak flow of 77 mgd up to the LTCP approved flow of 100 mgd. This will help the Client understand the WWTP improvements and associated costs to incrementally increase the WWTP peak capacity including the WWTP Secondary Treatment Improvements project improvements and additional improvements to achieve higher flows. The roadmap will also identify the recommended communication and process to work with IDEM accordingly, especially should the City desire to re -rate their permitted peak flow capacity. Note that this will focus on the permitted peak flow and not re -rating the average flow at this time. 7. Review Meeting and Summary Report a. Meet with Client to review the information and findings of the above tasks and obtain the Client's feedback. Arcadis' Project Manager and Project Engineer will attend the meeting in -person and Hydraulic and Process leads will participate via conference call. b. Develop the WWTP Peak Flow Stress Testing and Optimization Summary Report to summarize the results of the above tasks and the Client's meeting input. C. Two copies of the report and one electronic copy (pdf, searchable format) will be provided to the Client in draft format for review and comment. Following incorporation of Client's comments, two copies of the final report and one electronic copy will be submitted. 8. Process Loading Stress Test (optional) a. Should further confirmation be required after review of the process modeling results for the maximum peak flow condition, develop stress loading testing protocol and review protocol with Client staff in an onsite meeting. Update to incorporate the Client's input. b. During wet weather, perform on site loading stress test of the treatment capacity of the secondary treatment system. Three loading stress tests will be performed during the project schedule. The duration of the loading tests will be based on the typical year storm duration modeled to develop a peak flow at the WWTP as part of the latest LTCP reassessment. Coordinate with the CIient to determine this duration. Treatment loading stress tests will Page 4 (Exhibit A — Engineer's Services) EJCDC E-500 Agreement Bchveen owner and Engineer for Professional Services Copyright 0 2008 National Society of Professional Engineers for EJCDC. All rights reserved.