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November 7, 2024 <br />HWA Project No. 2024-P272-21 <br />Scope of Work 3 HWA GeoSciences Inc. <br />Each of the above-described geotechnical explorations will be logged by an HWA <br />geotechnical engineer or geologist. <br />GEOTECHNICAL ENGINEERING DESIGN SERVICES: <br />• Evaluate Geotechnical Field and Laboratory Data: Based on the CPT test results on <br />selected samples, HWA will generate estimates of the soil strength and other properties <br />needed to evaluate the effects the subsurface conditions will have on the proposed <br />improvements. <br />• Develop Geologic Cross-Sections: HWA will construct two geologic cross-sections, one <br />at each outfall location, as needed, for the project. The cross-sections will show near <br />surface soil conditions and will be provided in a geotechnical report. <br />• Generate Seismic Design Parameters: Based on the soils encountered along the <br />alignment, HWA will determine the Site Class for seismic design. The design spectral <br />acceleration parameters will then be selected in accordance with the AASHTO <br />Specifications for Road and Bridge. <br />• Slope Stability and Liquefaction Analyses and Recommendation: HWA will <br />conduct stability and liquefaction analyses for the proposed improvement and provide <br />geotechnical recommendations for design and construction of the proposed outfalls. <br />• HWA QA/QC: All design calculations and recommendations will be reviewed by a <br />senior principal prior to distribution to the design team. <br />• Prepare Draft Geotechnical Engineering Report: HWA will prepare a draft <br />geotechnical engineering report for the project. This report will contain the results of the <br />explorations and testing including descriptions of surface and subsurface conditions; a <br />site plan showing exploration locations and other pertinent features and summary <br />exploration logs. The report will also include the results of our engineering analyses and <br />provide geotechnical recommendations for the proposed improvements. <br />• Respond to Geotechnical Related Review Comments: HWA will provide written <br />responses to all review comments. The written responses shall be provided in the form of <br />emails to the design team. <br />• Prepare Final Geotechnical Engineering Report: HWA will prepare a final <br />geotechnical engineering report for the project once review comments are provided. <br />• Geotechnical Plan and Specification Review: HWA will collaborate with the design <br />team to verify that the geotechnical engineering requirements are properly incorporated <br />into the plans and specifications.