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○ Pre-demolition survey for asbestos will include existing buildings and structures previously not covered by GHD study, Fishing Pier, wooden sea wall. ○ Previous GHD marine sediment testing indicates concentration of metals and PCBs below respective RWQCB environmental screening levels for residential soil. ● Prepare abatement specifications for handling and removal of hazardous materials based on the results of the previous hazardous materials assessments and the results of the pre-demolition survey(s). Task 2.4 – Environmental Investigations ● Perform a current Phase I Environmental Site Assessment (ESA) – Previous Phase I ESA was performed in 2017. ○ Phase I ESA will include review of previous environmental investigations to determine the extent of additional environmental exploration needed. ● Perform a limited Phase II Environmental Site Assessment to supplement previous soil and groundwater sampling activities performed in 2017. ○ Sampling activities to include additional investigation of potential residual impact from presence of former UST near the vicinity of the Harbor Master’s Office ○ Perform a Soil Vapor Assessment Task 2.5 – Geotechnical Report ● Analyze and review data from previous site geotechnical reports ● Consultant shall drill additional borings for up to three (3) days at various locations throughout the site, based on current project and proposed improvements ● Test soil samples from borings in a laboratory including moisture content, gradation, Atterberg Limits, strength testing, consolidation, and corrosivity. Test results will be presented in an appendix in the geotechnical report. ● Analyze the subsurface conditions from previous geotechnical assessments, new geotechnical borings, and laboratory test results and prepare a geotechnical report that will include the following: ○ Site seismicity and seismic hazards, including the potential for liquefaction, lateral spreading, and estimated seismically induced settlement ○ Treatment of geotechnical constraints such as loose/soft surface soil, existing fill, compressible soil, expansive soil, liquefiable soil, and lateral spreading, as necessary, based on field exploration results ○ Analysis of potential total and differential settlement due to liquefaction and consolidation ○ Conceptual measures to mitigate hazards, geotechnical constraints, and predicted settlements ○ Foundation design recommendations for recommended foundation types of the proposed storage, maintenance, restroom, and recreational structures and California Building Code (CBC) seismic design criteria ○ Foundation design recommendations for overwater overlook and boat ramp including lateral loading design parameters for input into L-Pile ○ Slope stability analysis of the existing and proposed embankments and mitigation measures for slope instability, as needed ○ Site grading recommendations, including fill placement recommendations, utility backfill, and recommendations for site drainage ○ Retaining wall recommendations