Brown and Caldwell, Inc. 4/11/2026 Amendment 1

Port Gardner Storage Facility West Marine View Drive Storm and Combined Sewer - Exhibit A Scope of Work 18 • Provide utility coordination services during construction: o Design changes and coordination with Snohomish County Public Utility District, Puget Sound Energy, Navy communication lines and sewer and others as identified. o Incorporate relevant design information received from Utilities during construction. Assumptions: • Agendas and final meeting notes will be provided by the City’s CM. • Contractor will call for locate services (both public and private) as required • Contractor will develop temporary utility service applications • City will directly pay utility providers for utility relocations, pole holds, and similar utility fees. • Services will be provided upon request by the City. Deliverables • Meeting coordination materials including drawings, evaluation documents, calculations, or other materials, as requested by the City. Task 1024.4 Geotechnical Construction Services Activities/Approach: Geotechnical construction services are being led by HWA GeoSciences Inc. (HWA) and include the following: • Participate in project kickoff meeting (2 staff at 4 hours each) and up to five (5) construction coordination meetings (2 staff at 1 hour each). • Provide consultation for geotechnical aspects of the project that arise during construction. • Up to 315 hours (15 hours per structure for 21 structures) to provide periodic site visits to verify that subgrade soils are suitable to provide support for the proposed structures. If needed, additional subgrade inspections will be conducted under the Construction Management (CM) contract. Material and compaction testing will be completed under the third part CM contract. • As needed, provide part-time or full-time observation of the excavation and construction of the temporary shoring. This will include observation of sheet pile driving, soldier pile and monitoring for caving, verification that adequate depth is achieved, and placement of concrete and backfill. Up to five (5) part-time visits at 6 hours per day and five (5) full-time visits at 10 hours per day. Additional time may be required depending on Contractor’s progress, budget will be added by amendment or reallocated from other tasks as mutually agreed. • Prepare a summary field inspection report for submittal to the City, documenting the observed construction activities. • Provide on-call response with environmental sampling for unanticipated contaminated conditions that may arise during construction. Each on-call response is estimated to require approximately 12 hours for coordination with the analytical laboratory; travel; time on-site; sample submittal to the laboratory; analytical data review and tabulation; and preparation of field reports. All environmental samples will be submitted to the laboratory on a rush (1 to 2 day) turnaround time. Resulting environmental field reports will be provided the day after final laboratory results are received. This task includes up to 5 on-call responses.