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Consulting Services Agreement between City of San Leandro and Last revised 10/09/2022 Terraphase for Tony Lema landfill climate vulnerability assessment Exhibit A – Page 1 of 5 EXHIBIT A SCOPE OF SERVICES AND COMPENSATION SCHEDULE Terraphase will provide technical expert support services to the City of San Leandro for San Francisco Bay Regional Water Quality Control Boa rd (SFRWQCB) Waste Discharge Requirements Amendment compliance related tasks. The proposed consulting support will include the following: Task 1: Site Background Review, Regulatory Review and Flood Research Task 1 will include site background review, regulatory review, and flood research. Terraphase will develop existing Site topography and associated exhibits based on available LiDAR data. Landfill records made available by the City of San Leandro and records available through the GeoTracker database will be reviewed to better understand Site constraints, landfill contents, potential contaminants, fill material characteristics, existing utilities, evidence of subsidence and other pertinent data. A Site inspection and photo documentation of existing conditions will be performed. Subsurface groundwater conditions will be characterized by reviewing onsite groundwater well records provided by the City of San Leandro and GeoTracker records of nearby groundwater wells. Current golf course operations and maintenance practices provided by the City of San Leandro will be reviewed. Landfill and drainage regulatory information will be reviewed and summarized. Flood research will include review of the following references, among others, to better understand estimates of future sea level rise, groundwater rise, and extreme storm events: • 2018 State of California Sea Level Rise Guidance by Ocean Protection Council • Current Updated Global and Regional Sea Level Rise Scenarios for the United States by NOAA and others • San Francisco Bay Shoreline Adaptation Atlas by San Francisco Estuary Institute • Bay Plan Climate Change Amendment by the Bay Conservation and Development Commission • Coastal Storm Modeling System by United States Geologic Survey • Analysis of Impact of Nonstationary Climate on NOAA Atlas 14 Estimates by NOAA • Alameda County Hydrology & Hydraulics Manual Task 2: Flood Quantification and Justification This task includes conducting an analysis of surface water inundation (flooding) and groundwater elevation rise associated with Sea Level Rise (SLR) scenarios for the years 2050 and 2100. The analysis will be conducted consistent with the Ocean Protection Council (OPC) Guidance (OPC, 2018) using the most recent and best available climate change projections and trajectories presented in “Global and Regional Sea Level Rise Scenarios for the United States” (Sweet et.al. 2022). For the 2050 and 2100 predictions, the medium-high and extreme risk aversion SLR scenarios will be considered, and a risk scenario will be selected and identified for the 2050 and 2100 conditions. The selected magnitudes of SLR will be superimposed onto the groundwater surface to assess groundwater rise and potential daylighting of groundwater. Quantification of the 100 -year storm event will include astronomical tides, storm surge, wave run-up, seasonal effects, and discharge from local tributaries. For the 2100 condition, the impact of climate change on the future 100 -year storm event will also be considered.