7725 EVERGREEN WAY BASE FILE 2016-01-01 MF Import

Special consideration should be given to the potential for differential settlements at the juncture of the existing building to the new construction. Provided that the new fill is placed and compacted as recommended and the footings are property installed, differential settlements should not exceed one-half inch and should be more than 50 percent complete by the end of construction. ��e risk and magnitude of differential settlement at this location can be further reduced by extending the bearing down to the dense tills below the new fills. It is understood that the existing building foundation was overexcavated and extended to bear on the very dense till soils. Site Preparation a�d Earthwork Bui.lding and pavement areas should be stripped and cleared of all trees, surface vegetation, root mats, organic matter and any other deleterious material. It is anticipated that a stripoing depth of four to six inches will be required. Stripped materials should be removQd from the site or. stockpiled for later use in landscaping. Stripped materials shoulfl not be mixed with any materials to be used as structural fill. Following the stripping operation, the ground surface where structural fill, foundations, or slabs are to be placed should be proofrolled. All proofrolling should be performed under the observation of a representative of ECI. Soil in loose or soft areas should be removed and replaced with structural fill to a depth that will provide a stable base beneath the general structural fill. Structuraly fill is defined as any imported new fill or recompacted existing fill placed under buildings, roadways, slabs, pavements, or any other load bearing areas. On-site silty sand till soils were near their optimum moisture content at the t`_me �` our exploration, and may be used as structural f;� l provided ti�e grading operations are conducted during dry weather. Existing - 5 -