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City of Pleasanton P6621.002.000 Storm Damaged Repair Sites March 7, 2024 PROPOSAL FOR ENGINEERING DESIGN SERVICES Latest Revision March 25, 2024 Page 2 Phase 002 – Basis of Design Reports ENGEO will complete geological, geomorphic, and hydrologic concept designs of each area in a Basis of Design report. The reports will describe the proposed repairs and describe how impacts to jurisdictional waterways will be minimized. We recommend for each project that a 30 percent-to 65 percent engineering improvement plan be generated with the submittals to the resource agencies and turned in with the Basis of Design reports so that a preliminary impact assessment and mitigation plan be generated. Basis of Design reports can be turned into FEMA engineering reports for repairs seeking FEMA funding after regulatory agency approvals have been granted. These reports will discuss approximate limit of impacts to jurisdictional waterways, approximate construction methods to be used, and preliminary volumetric and linear impact quantities of cut and fill materials that can be used for environmental permitting purposes. We expect to produce two reports, one for the CS Project and one for the Bernal Project. For the Vineyard Outfall repair project, MacKay and Somps will provide a portion of the hydraulic analysis. For the Bernal Project, the trail repair will require a geotechnical investigation and a soldier pile wall design. We will plan to drill three borings to a depth of 30 feet, which we believe is the approximate extent to which the foundations of the soldier pile wall will extend. Geotechnical recommendations will be included in our Basis of Design Report. Phase 003 – Cultural Resources Evaluation EDS will prepare a cultural resource evaluation for each site, with the exception of the Sassafras repair which appears to not have a nexus with Waters of the United States. The cultural resources evaluation will be required for each project for conformance with CEQA guidelines and Section 106 of the National Historic Preservation Act (NHPA). EDS will prepare maps for the studies, including location maps that depict the Project sites on USGS 7.5-minute quadrangles, Area of Potential Effect (APE) maps, survey coverage maps, and any other maps necessary for research or documentation purposes. GPS data processing includes post-processing any GPS-collected field data and incorporating GPS-collected field data into ArcGIS for mapping purposes. EDS will complete a record search at the Northwest Information Center (NWIC) of the California Historical Resources Information System (CHRIS) located in Rohnert Park, California, to obtain and review information about previously recorded cultural resources within the Project Areas and within 0.25 mile of the Project Areas, or a greater distance if warranted by the paucity of cultural resource information within 0.25 mile. The research will consist of reviewing historical maps, aerial photographs, and other information to assist in assessing the potential/sensitivity of the Project Areas to contain buried archaeological resources that could be encountered during ground-disturbing activities associated with the Projects. A final report will be submitted for each project to the USACE as part of their Federal Review of the project. Phase 004 – Biological Resources Technical Report WRA will prepare two biological resources technical reports (BRTR) to support regulatory permit applications and the CEQA document. The BRTRs will be completed at a level of detail necessary to provide sufficient information to enable preparation of a CEQA document and regulatory permit applications. The BRTRs will discuss the results of the literature search and site visits and will provide information on the known or potential habitat at the site for any special-status plant and wildlife species. If any special-status species are observed, they will be reported in the findings. DocuSign Envelope ID: 9D598DAC-5F24-41FA-B827-97D013A47ECADocuSign Envelope ID: CEB20404-63F8-4DC5-AE6A-C5FC89DB6F87