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Moffatt & Nichol Redwood Shores / San Carlos Airport Levee, San Mateo County PROPOSAL FOR LEVEE CERTlFICATION SERVICES 8585.000.001 June 26, 2009 Page 4 · Physical properties of the typical soils encountered in the project area. · Conclusions regarding verification of assumptions made regarding shear strength and consolidation of the site soil in our preliminary evaluation models. In the case that the assumptions incorporated into our models developed during our preliminary evaluation are not confirmed, we would need to discuss what measures would need to be taken. Schedule We expect that our permitting and scheduling services will commence immediately following your authorization and receipt of an agreement. Depending on site conditions and weather, the field exploration will begin once the required pennitting has been obtained. We understand the County requests a minimum of 5 working days to process a drilling permit. We estimate the time required to complete drilling and Vane Shear Testing will be 4 days. The time to complete all portions of the geotechnical study including laboratory testing and analysis will be approximately 4 weeks from completion of the field work. Site Access~ Conditions and Assumotions Necessary removal or unlocking of fences or gates and permission to enter restricted areas of the project from the current owner or leaseholder must be secured by the client prior to our field activities. All field work will be coordinated with the City of Redwood City at least 48 hours in advance. If site access, unstable roads, weather or ticia1 conditions restrict our field operations, a revision to our estimate may be necessary. Prior to initiating our subsurface exploration, we request that you provide existing plan and profile improvement drawings to ENGEO for review. Additionally, all known existing utilities and utility easements that are within the proposed project area must be made available to ENGEO at least five days prior to our field exploration. We will notify Underground Service Alert (USA) at least 48 hours prior to perfonning our subsurface exploration which will locate public utilities bordering the property limits. ENGEO will accept no responsibility for damage to existing private utilities or public service laterals within the project alignment not accurately located in the manner described above. All additional costs incurred as a result of encountering utilities will be charged on a time-and-expense basis over and above the fee for the geotechnical exploration. In the event potentially hazardous materials are identified visually or by odor within our exploratory borings or VST, we will notify you as soon as possible of such an occurrence in order to mutually decide whether to continue, modify, or cease the remainder of the field