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 35 • Verification of easement boundaries. • Verification of pipe inverts and alignment. • Verification of location and monitoring of settlement monitoring points. • Verification of existing site features. • QA/QC of Contractor survey. • Survey services will be in coordination with City of Everett technical activities. Construction Contractor will provide their own survey services to locate and support construction activities. Deliverables: • Surveyor notes, maps, and information in electronic format. • Revised base mapping for use in Record Drawings. Use electronic CAD files. Task 1054.6 Trenchless Pipeline Observation Activities/Approach: Trenchless pipeline observation support services during installation of the conveyance pipelines are being led by Staheli Trenchless Consultants (Staheli) and includes the following: • Participate in up to twelve (12) one-hour construction progress meetings (held virtually), up to fourteen (14) one-hour coordination meetings (held virtually), up to twelve (12) one-hour focus meetings (held virtually), and up to five (5) 2-hour site visit meetings (2 staff attending all meetings). Site visit meetings include one hour for travel, one hour to prepare, and one hour of follow-up coordination. • Provide observation as for general conformance to the construction documents during installation of the conveyance pipelines over an estimated fifteen (15) site visits for field inspections, each requiring four (4) hours of one STC staff for each visit. • Trenchless Dry Bore installation and shaft observation will be as needed and is estimated at three hundred twenty (320) hours over a period of four (4) months. • Sliplining observations will be needed and is estimated at 100 hours over a period of two (2) months. Observation will not be performed for construction of excavation support systems. • Review data associated with pipeline installation, assume approximately 80 hours of effort. • Prepare field reports for approximately 15 site visits. Highlight observed deficiencies. Assumptions: • The City will give notification when observation is required. • Contractor will provide trenchless production data in a timely fashion. Deliverables: • Written observation report, summarizing work observed, persons present at the site visit, and any corrective actions needed in electronic format. Task 1054.7 Structural and Civil Observation Activities/Approach: • At the Project Representative’s request, BC staff will provide structural observations by structural engineer. Structural observations by structural engineer will be part-time over three (6) months, totaling up to forty (40) hours.