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

City of Everett 00 6363 - 4 Water Filter Plant – Phase 2 Capital Upgrades WO #3763 Page 4 of 4 Change Order No. 1 Change Order Effective Date: 2/4/26 Exhibit A—Description of Changed Work Change Order No. 1 modifies four (4) items and adds two (2) new items as follows. A Change Order 1 fund calculation and allocation summary and backup documentation for Work Change Directives (WCD) 13 and 14 is also provided. Modified Items: Item 320 Phase 2 DB Fee – Modify existing item 320 by adding $63,372.39 in funds resulting in a revised total item value of $1,679,566.10. Item 340 General Conditions Fee – Modify existing item 340 by adding $208,290.00 in funds resulting in a revised total item value of $1,998,105.57. Item 350 Pass Thru Cost – Modify existing item 350 by adding $53,131.99 in funds resulting in a revised total item value of $1,302,714.78. Item 440 Field Directed Change Orders – Modify existing item 440 by adding $4,798.32 in funds resulting in a revised total item value of $76,607.00. New Items: Item 450 Flocculation Basin Crack Repairs – Create new item 450 entitled Flocculation Basin Crack Repairs by adding a new lump sum item in the amount of $433,521.87. Item 460 IMCO 40% Contingency Share – Create new item 460 entitled IMCO 40% Contingency Share by adding a new lump sum item in the amount of $363,340.00. Justification: Change Order No.1 adjusts the construction contract to incorporate additional work efforts and costs associated with WCD 13 and WCD 14 and to reinstate the contractor’s (IMCO) 40% share of project contingency funds that were previously used to pay for additional costs associated with WCDs 3-12. WCDs 3-12 and the temporary reallocation of the contingency funds being reinstated is described in detail in Budget Reallocation 2 (attached). WCD 13 Justification – WCD-13 accounts for additional construction costs related to flocculation basin coating repairs due to coating system failures in all four trains of the flocculation basin. Repairs in train 4 include coating removal and replacement as necessary to repair coating defects due to dynamic and static cracking. Repairs in trains 1-3 include coating removal and replacement as necessary to repair coating defects due to static cracking. Repairs shall be made as recommended in the attached crack repair letter from Tnemec to Long Painting dated August 14, 2025. WCD-13 and supporting documentation is attached. WCD 14 Justification – WCD-14 accounts for additional construction costs related to procurement and delivery of spare parts for the progressive cavity polymer pumps. WCD-14 and supporting documentation is attached.