IMCO General Construction, Inc. 2/17/2026 Change Order 1

Page 2 of 3 New Item 440.00 Field Directed Change Orders – Create new item 440.00 entitled Field Directed Change Orders by adding a new lump sum line item in the amount of $71,808.68. Funds Reallocation Summary: Bid Item 300.00 Contingency • Deduct a $908,575.00 from bid item 300.00 Contingency resulting in a revised bid item value of $0.00. • Provide $38,063.52 to new item 430.00 5-Line Thrust Block. • Add $3,593.20 to bid item 340.00 GC Fee. • Add $844,440.51 to bid item 140.00 Flocculation Basin Improvements. • Provide $22,477.77 to new item 440.00 Field Directed Change Orders. Bid Item 310.00 Allowance • Deduct $56,109.65 from bid item 310.00 Allowance resulting in a revised bid item value of $353,834.62. • Add $6,778.74 to bid item 340.00 GC Fee. • Provide $49,330.91 to new bid item 440.00 Field Directed Change Orders. Justification: Modified Bid Item 140.00 Flocculation Basin Improvements – Additional surface preparation was required on existing flocculation basin concrete to prepare the substrate for application of the final coating system. This additional effort was approved by City staff on a monthly basis and documented with work change directives 3, 5, 7, 9, and 11. The combined cost of the additional surface preparation was $615,373.41. High moisture vapor transmission rates in existing flocculation basin concrete and excessive concrete drying times not meeting project time constraints required a change in the final concrete coating system. Costs associated with the change in concrete coating system were approved by City staff on a monthly basis and documented with work change directives 4, 6, 8, 10, and 12. The combined cost of the coating system change was $229,067.10. The total cost of the additional surface preparation and coating system change was $844,440.51. The lump sum amount for bid item 140.00 is modified by adding $844,440.51 in funds resulting in a revised total bid item value of $8,173,585.77. The added funds are shifted from bid item 300 contingency as described below. Further explanation of the additional costs incurred are shown on the attached work change directives and invoices. Modified Bid Item 300.00 Contingency – Contingency funds in bid item 300.00 are reallocated to bid item 140.00, bid item 340.00, new item 430.00, and new item 440.00 as described herein. Per the Project contract, IMCO is entitled to 40% of GMP savings at project completion including any unused bid item 300.00 contingency funds. As such, IMCO’s portion of bid item 300.00 funds transferred to bid item 140.00 and new item 440.00 which combined equals $866,918.28 will be reimbursed and set aside in a new item via future Change Order 1. 40% of the contingency funds transferred to bid item 140.00 and new item 440.00 equals $346,767.31. Funds reallocated from bid item 300.00 to bid item 340.00 and