Brown and Caldwell, Inc. 10/28/2025

WPCF Headworks Replacement Project Scope of Work 23 Rights of entry onto private property for drilling activities and groundwater monitoring is not anticipated. HWA assumes no concrete pavement or slabs at the drilling locations and assumes that coring will not be required prior to drilling the proposed borings. All borings will be patched with quick drying concrete placed within the pavement core, no larger patching will be completed. Monitoring wells installed as part of the field explorations will be maintained throughout design and abandoned by others during construction. The monitoring wells will not be utilized for environmental groundwater monitoring by HWA. The geotechnical explorations proposed herein will NOT be used to assess site environmental conditions of the entire site (i.e., no environmental assessment of areas not sampled). Pumped water will be discharged directly to storm drains or sanitary sewer present on site, with the permission of the City. No water testing or treatment is included in this scope. The proposed dewatering assessment is for project design and planning purposes only and will not be included in the geotechnical report and should not be included in project bid specifications. It does not constitute a dewatering design or plan for the project. Dewatering rates will assume open excavations (i.e. no cut-off walls impeding groundwater flow), and will be valid only for the excavation configurations and geometries described in the accompanying memorandum. Additional scope and budget will be required if excavation sizes, shapes, or depths change and updated rates are needed, re-analysis will need to be performed to provide valid rates. The design shall assume 2024 International Building Code and American Society of Civil Engineers 7-22 code standards. The Geotechnical Reports shall be delivered in PDF format. City Responsibilities Facilitate site access for field reconnaissance, geotech investigations, and groundwater monitoring. Support utility locates within the vicinity of the proposed field investigation. Meetings Weekly coordination meetings with prime Bi-weekly coordination meetings with PSE structural Deliverables Phase 1 Geotechnical Subsurface Exploration Plan Memorandum Draft Geotechnical Report - Preliminary Design (30%) Phase 2 Geotechnical Subsurface Exploration Plan Memorandum Phase 2 Pump Test Report Revised Draft Geotechnical Report Intermediate Design (60%) Revised Draft Geotechnical Report Final Design (90%) Final Geotechnical Engineering Report Dewatering Memorandum