1402 SE EVERETT MALL WAY FREDERICK AND NELSON 2018-01-02 MF Import

glacial till in utility trench areas will be greater than in other portions of the building site. Ground water was not encountered in any of the borings. The till which underlies the site is characterized by a very low permeability and does not readily absorb or transmit water, except in isolated po::kets of sand within the till. CONCLUSIONS AND RECOMMENDATIONS GENERAL We understand that site development will include placement of fill to raise the grade about 3 to 8 feet above the existing surface. Soils below existing grades are dense to very dense and are relatively incompressible. No problems are expected in su?porting the building on shallow spread footings founded within the compacted structural fill placed to raise site grades. SITE PREPARATION AND FILL PLACEMENT Prior to placing structural fill in the building area, the existing asphalt pavement should be ripped and broken into pieces 10 inches or smaller in diameter to allow for free movement of subsurface drainage. This should be planned for all areas where site grades will be raised above existing pavement grades. After the asphalt has been broken thoroughly, but prior to fill placement the surface should be compacted with a v Sratory roller. Vegetation in the southern portion of the building area should be stripped and removed prior to filling. A soil stripping depth of 3 inches should be planned to remove roots and organic material of recent origin. The native soils adjacent to the site are high in silt content and are very sensitive to changes in moisture content during compaction. -4- nAME5 C. MOORE