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Wagstaff and Associates Contract Exhibit "A" City of Redwood City Bair Island Road Development EIR October 25, 2001 Page 1t-21 at this location, and will identify construction and/or site preparation measures that should be implemented to reduce the impacts to generally accepted levels. 1. Setting. The EIR analysis will be based on existing local and regional soils reports and, if available, on-site specific geotechnical investigation and construction recommendations prepared for the proposed project and for previously developed properties in the immediate vicinity. Reference will also be made to studies completed in support of the City and County General Plans and to regional maps and technical papers that examine the geotechnical conditions expected to be found on the project site. In addition, the location of all known or suspected fault traces will be documented. 2. Impacts. Existing available soils information will be used to describe the site's potential for long-term settlement associated with compression of existing surface soils and of fill materials (e.g., for the marina reconfiguration). The hazards associated with earthquake- induced groundshaking, in particular liquefaction and differential settlement, will also be described, along with the effects of corrosive soils that can damage or adversely affect driven piles, slabs-on-grade, concrete footings, or underground utilities. 3. Mitiqations. The EIR will identify excavation, soil preparation, and foundation and building construction measures that should be taken to minimize the risk of damage during an earthquake and to resist the potentially damaging effects of locally unstable soil conditions. It is expected that construction of individual buildings on the project site in conformance with the Uniform Building Code will provide a sufficient level of structural integrity to resist catastrophic failure, so mitigations will likely focus on the need for special foundation and soil stabilization approaches. All mitigations will be predicated on the subsequent (post-EIR) preparation of final engineering designs, and on the continuous observation of all excavation, grading, and foundation preparation by a registered soils or geotechnical engineer. I. Public Health and Safety (Wagstaff and Associates with Environmental Data Resources, Inc.) Project construction activities may result in construction-period human contact with hazardous materials as contaminated soil or groundwater. The following tasks will be completed to address related public health and safety issues. 1. Setting. Environmental Data Resources, Inc. (EDR) will conduct a computer-assisted file search of appropriate jurisdictional agency files for known and potential hazardous materials sites within and near the project area. Based on information derived from the file search, existing known and potential hazardous materials and wastes present on and near the site will be described. The search will include potential dredge spoils and potential soil and groundwater contamination from past and current commercial/industrial uses. The characteristics of the adjacent electrical transmission tower line easement will also be described (r-o-w width and setbacks, tower line physical characteristics and power rating, etc.). WP51~622iMISCtOO13-2. EXA