Amendment to PSA - Donohue & Associates - South Well Field Improvements (2)

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1.2. Request additional information from the Owner necessary for development of the design documents. Review available studies, reports, drawings, and information regarding the South WF and WTP. 1.3. Prepare front-end specifications to the approximate 50% completion stage using Owner's standard front-end sections, and include an outline of anticipated technical specifications. 1.4. Incorporate the survey information collected as part of Task Order 403 into the design documents. 1.5. Retain the services of a geotechnical firm to perform geotechnical borings at intervals along the routes of the finished water main and the backwash waste sewer to determine underground conditions and bedding requirements for underground lines. 1.5. Perform detailed hydraulic calculations of system curves for new well pump selections, incorporating information from previous hydraulic modeling completed as part of Task Order #2. 1.7. Prepare flowsheets and preliminary process and instrumentation diagrams (P&iDs) for the proposed improvements. 1.8. Perform preliminary equipment selections based on preferences of Owner's staff and Donohue recommendations. 1.9. Perform hydraulic calculations for process piping, and determine sizing requirements for new process lines, structures and equipment. 1.10. Identify major utilities and their approximate locations within the Project site limits. 1.11. Utilizing available drawings, field visit observations and discussion with Owner, prepare preliminary layout drawings for Project facilities. 1.12. Prepare a Preliminary Functional Description of the upgraded chlorine feed system and controls. 1.13. Prepare a preliminary design submittal consisting of written descriptions of the Project indicating the proposed facilities along with the basis for selection, the final design criteria, a summary of hydraulic design calculations, a listing of any potential conflicts including environmental or utility impacts and proposed resolutions, any special construction requirements/procedures that may be known at the preliminary design stage, a listing of permits required for construction approval, preliminary design drawings that are at the approximate 50% design completion point, and opinion of the probable construction cost based on the preliminary design documents. 1.14. Perform an internal quality review of the preliminary design deliverables, and submit up to five (5) copies of the preliminary design submittal (50%) to the owner for review and comment. 1.15. Conduct a Preliminary Design meeting with the Indiana Department of Environmental Management (IDEM) for in preparation of their review of this project. 1.16. Conduct a 50% Design Review Meeting with the Owner, and incorporate comments and any necessary changes into the design. Page 3 of 6