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City of Redwood City Redwood Shores Branch Library Seismicity: We will discuss the regional seismicity including regional active faults, maximum estimated ground shaking, and future earthquake probabilities. We will provide a regional fault map showing the proximity of the site to major Bay Area faults within a 100-km radius of the site. We will also provide seismic coefficients for design based on Chapter 16, Division V of the 2001 California Building Code. Innovative engineering for cost- Foundations: Utilizing the data collected effecöveconsuucöon during our investigation, we will recommend suitable foundation types and estimated settlements for the proposed buildings. We will also provide foundation design criteria including recommendations for minimum size, embedment depth, allowable vertical and lateral capacities, and expected total and differential settlements. Bay Mud Settlements: Since the site is underlain by highly compressible Bay Mud, we will provide estimates of the future site settlement, taking into account the weight of the existing fill and any additional fill proposed. We will provide settlement charts to allow for efficient development of the grading plans, and drainage and underground utility design. Siabs-On-Grade: We will present slab-on-grade criteria, including recommendations for subgrade preparation, minimizing moisture rise through slabs-on-grade, and if necessary, non-expansive fill. We have extensive local earthwork construction Earthwork: We will present earthwork experience. criteria, including recommendations for clearing and site preparation, subgrade preparation, compaction, materials for fill, temporary cut and fill slopes, utility trench backfill, surface drainage and landscaping considerations, as necessary. Retaining Walls: We will present retaining wall design criteria, including recommended foundation type, lateral earth pressures, drainage, and backfill. Pavements: We will present flexible asphalt concrete pavement sections for traffic indices ranging from 4.0 to 6.5. Pavement design will be based on results of R-value testing and the expected properties of import soils. We will also present Portland cement concrete pavement sections. Soil Corrosion Evaluation: We will summarize the results of our previous corrosion testing at the site, and discuss potential impacts to underground utility lines and concrete. LOWNE\~ASSOCIATES Page 4 Environmento: /Geotechnicol /Engineering Services P13333 . ..