METCALF & EDDY, INC. 1 -2005 - Laserfiche WebLink

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— \York Plan 2J Field Investigation and Laboratory Testing, To investigate subsurface conditions, we propose to advance two test borings at the proposed pump building site. It is anticipated that the site is underlain by young alluvial deposits that may have the potential for liquefaction. To assess whether such conditions exist, we propose to advance the borings to a depth of about 50 feet using rotary wash drilling methods. Our field representative will observe drilling of the borings, log the soil encountered, and obtain soil samples for further visual classification and laboratory testing. We anticipate that geotechnical laboratory testing would consist of moisture content, density, gradation, shear strength, and plasticity characteristics, as appropriate. The borings will be backfilled with cement grout upon completion. Soil cuttings will be generated from the test borings. For estimating purposes, we have assumed that soil cuttings can be left on -site at the boring locations. Our scope and fee also assume that the soil is free of contaminants. In the event that these are not the conditions encountered, we will be requesting additional scope and fee from you to address these issues. Enzineerino Analyses and Report Preparation Based on the conditions encountered in the test borings and laboratory test results, we will perform engineering analyses to develop geotechnical conclusions and recommendations for the project. We will prepare a report that will describe subsurface conditions at the site and will include, as appropriate, field and laboratory test data, logs of the test borings, and a site plan showing the location of each exploration. The report will present our discussions, conclusions, and recommendations regarding the following: • Site geology and seismicity; • Soil and groundwater conditions encountered; • California Building Code (CBC) site factors for seismic design (assumes no response spectra required); • Discussion of the potential for seismic hazards such as liquefaction and lateral spreading, and potential mitigation measures; • Appropriate foundation type(s) for the pump building; • Geotechnical design criteria for the recommended foundation type(s), including allowable bearing pressures, and lateral resistance; • Estimates of foundation settlement; • Recommendations for earthwork including subgrade preparation, placement and compaction of fill, suitability of on -site soil for use as fill; • Discussion of the impacts of groundwater on design and construction, if any; • Pipeline bedding and backfrll requirements; and + Asphalt concrete pavement section recommendations, if required. 4.2 Structurallnrprovements: Structural improvements will include a building to house new booster pumps and electrical equipment and a perimeter wall to replace chain link fencing. Other pump station components that could require repair/ replacement if identified could also be w Confidential • Trade Secret and Proprietary Information ofdfetcolf & Eddy. Inc.