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Consultant will include design drawings for duplicate and redundant yard piping for the transfer piping from the clearwell to the storage tanks, and suction piping from the storage tank outlet to the high service pumps. Consultant will review the existing process trench and identify areas that require structural repair and rehabilitation. Consultant will prepare construction drawings and details for areas requiring rehabilitation. Consultant will prepare design documents for replacement of process piping within the building floor trench. The documents will detail limits of replacement, materials of construction, and phasing to maintain treatment operations. Consultant will evaluate methods of reducing scaling at the scrubber blowdown pump station, consisting of alternate scale inhibitor addition, alternate makeup water source to include reduced hardness of makeup water, and addition of CO2 solution feed to scrubber blowdown. Consultant will prepare drawings and specifications for upgrades to the laboratory room, consisting of cabinet and countertop upgrades. Laboratory equipment replacement will be specified by IRCU and be limited to replacement of similar type equipment. Major renovation (plumbing & electrical change) of the room and cabinets is not included. Consultant will prepare process and instrumentation diagrams (P&IDs) for the proposed improvements. Consultant will prepare electrical drawings and specifications, consisting of single line diagrams, network drawings, electrical schematics and details. C&W Engineering will provide the electrical design services. Consultant will prepare an updated network diagram for the PLC and SCADA system improvements. Control Systems Design, Inc. will provide these professional services. It is estimated that approximately 80 - 104 drawings will be required as part of this project. Consultant will prepare drawings for the following: • Cover sheet (1 sheet) • Legend, abbreviations, and general notes (3 sheets) • RO Train modifications (8-10 sheets) • Skid piping modifications and feedwater pump room (4-6 sheets) • Trench piping (2-4 sheets) • Trench repairs or flowable fill/structural slab (1-3 sheet) • Chemical piping listed herein (3-4 sheets) • Yard piping — transfer piping, tank supply piping, distribution piping (2-3 sheets) • Post-treatment scrubber blowdown (1-2 sheets) • Laboratory room upgrades (4 — 6 sheets) F:\Utilities\UTILITY - Engineering\WATER\WTP - South RO\19-1115 South RO Water Treatment Plant Improvements\Admin\Oslo WTP Water Plant Improvements 11.25.19.docx Page 4 of 9