Discussion and Consideration of Change Order #2 – Tricon Construction – Tiffin Water Treatment Facility Upgrade Project – Motion to Approve — K.4

RFI To: Clint Wienen MSA Professional Services 400 Ice Harbor Drive #110 Dubuque, IA 52001 Ph: (563)582-3973 Fax: (563)582-4020 CC: Tom Shedek (Tricon General Construction), Andy Knapp (Tricon General Construction) Subject: Alliant Transformer Pad Relocation Drawing: Sheet 05C102 Cost Impact: TBD Spec Section: N/A Schedule Impact: N/A RFI #: 4 Date: 8/19/2025 Job: 25-012-IA Tiffin WTP Phone: Request: With the transformer pad moving to the inside of the new project fence, please confirm the following items: 1. Confirm top of pad elevation. 2. Confirm specific pad location, location provided on plan view is based off of scaling the design plans and Alliant feedback. 3. Confirm if bollards are required. If so, please provide quantity, location, and type of bollards if needed (embedded, bolt down, etc.) Requested by: Betty Keuter Tricon General Construction Date Required: 8/26/2025 Response: Please see the attached drawing at the end of the RFI for clarification. Also please note that the new electric service will be 2000A. Therefore the transformer pad dimensions are to be 105"x108"x8". Clint Wienen Answered by MSA Company 8/20/2025 Date