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<br />Consulting Services Agreement between City of San Leandro and <br />Gates & Associates, Inc for Staff Augmentation Exhibit A – Page 5 of 31 <br />● Consultant shall drill additional borings for up to three (3) days at various locations <br />throughout the site, based on current project and proposed improvements <br />● Test soil samples from borings in a laboratory including moisture content, gradation, <br />Atterberg Limits, strength testing, consolidation, and corrosivity. Test results will be <br />presented in an appendix in the geotechnical report. <br />● Analyze the subsurface conditions from previous geotechnical assessments, new <br />geotechnical borings, and laboratory test results and prepare a geotechnical report that <br />will include the following: <br />○ Site seismicity and seismic hazards, including the potential for liquefaction, lateral <br />spreading, and estimated seismically induced settlement <br />○ Treatment of geotechnical constraints such as loose/soft surface soil, existing fill, <br />compressible soil, expansive soil, liquefiable soil, and lateral spreading, as <br />necessary, based on field exploration results <br />○ Analysis of potential total and differential settlement due to liquefaction and <br />consolidation <br />○ Conceptual measures to mitigate hazards, geotechnical constraints, and predicted <br />settlements <br />○ Foundation design recommendations for recommended foundation types of the <br />proposed storage, maintenance, restroom, and recreational structures and <br />California Building Code (CBC) seismic design criteria <br />○ Foundation design recommendations for overwater overlook and boat ramp <br />including lateral loading design parameters for input into L-Pile <br />○ Slope stability analysis of the existing and proposed embankments and mitigation <br />measures for slope instability, as needed <br />○ Site grading recommendations, including fill placement recommendations, utility <br />backfill, and recommendations for site drainage <br />○ Retaining wall recommendations <br />○ Secondary slab-on-grade (flatwork) recommendations <br />○ Pavement recommendations for hot mix asphalt <br />○ Geotechnical recommendations associated with stormwater treatment <br />● The geotechnical report will include a summary of the existing conditions and proposed <br />improvements, surface and subsurface conditions, groundwater observations, seismicity, <br />laboratory test data, boring log data, and a site plan showing exploratory locations and <br />improvement limits. <br />Task 2.6 – Bathymetric Survey <br />● Mobilization and Calibration <br />○ Coordination with Project Managers, field plan and HASP generation and the <br />programming of the sonar acquisition computers and getting the vessel and crew <br />to the site. <br />● Condition Multibeam Bathymetric Survey <br />○ Collect near 100% bottom coverage throughout the survey footprint. <br />DocuSign Envelope ID: 30A47DAA-8ADC-4C81-A393-00F3D4407ED9