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 19 • Provide the City and/or Contractor with waste profiling assistance by preparing applicable portions of waste profile documents for proper disposal of contaminated materials. The City or Contractor will sign as the “generator” of all waste profile documents. • BC will attend up to three (3) site visits (10 hours each including preparation and travel) for geotechnical observations and coordination. Assumptions: • Soil samples will be collected from stockpiled soils by the Engineer. The Contractor will provide assistance with sample collection (e.g., operation of heavy equipment if needed for sampling) • Water sampling will be conducted from water storage tanks with a reasonably accessible port to fill laboratory containers. • The City or City’s CM will schedule sample collection with a minimum of 48 hours’ notice prior to the requested soil sample collection. • The construction services are provided based on an estimated rate of progress by the Contractor, which may require adjustment due to the Contractor's rate of construction, weather delays and/or other factors beyond the Engineer’s control. • The City or City’s CM will schedule inspection as needed, with a minimum of 48 hours’ notice prior to the requested inspection date. • Evaluation of fill placement and compaction, if needed, will be completed under a separate contract with the third-party CM. Laboratory testing of construction materials is excluded. • Soil and/or groundwater samples will be analyzed for contaminants based on the disposal facility requirements within the limits of the budget. • The City or Contractor will sign as the “generator” of all waste profile documents, and all discharge water permit documents. All fees associated with waste profile submittal, discharge permit applications, and contaminated material disposal will be covered by the City or Contractor. All hours and items are estimated and may be shifted between tasks within the limits of the total budget at the discretion of HWA's project manager. • The response to on-call geoenvironmental services is for sampling of suspect contaminated materials and assistance with disposal of the suspect materials. Full-time or extended oversight of excavation of contaminated areas is not included in this scope of work. • Work performed outside of standard business hours and days (7:00 AM to 7:00 PM, Monday to Friday) will be billed at 1.5 times the standard hourly rate. All night work is charged at an 8-hour minimum segment. Night work cancelled within 12 hours of scheduled time will be charged 8 hrs. All weekend work is charged at a 4-hour minimum segment. Weekend work cancelled within 12 hours of scheduled time will be charged 4 hrs. • Suspected contaminated soils or groundwater will be stockpiled on-site by the Contractor while testing occurs. • Daily inspections of construction activities will be conducted by the construction management team. Deliverables: • Field inspection reports for site visits • Laboratory test results • Applicable portions of waste profile documents for proper disposal of contaminated materials.