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GeoTest Services, Inc. Report Date 7/17/2019 <br /> Anderson Residence-Everett, Washington GTS Project No.19-0384 <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Based on the evaluation of the data collected during this investigation, it is our opinion <br /> that the subsurface conditions at the site are suitable for the proposed development, <br /> provided the recommendations contained herein are incorporated into the project <br /> design. <br /> Site Preparation and Earthwork <br /> The portions of the site proposed for foundations and flatwork should be prepared by <br /> removing existing pavements, topsoil, deleterious material and significant <br /> accumulations of organics. Prior to placement of any foundation elements or <br /> structural fill, the exposed subgrade under all areas to be occupied by soil-supported <br /> floor slabs, spread, or continuous foundations should be remedially compacted to a <br /> firm and unyielding condition. <br /> Fill and Compaction <br /> Structural fill used to obtain final elevations for footings and soil-supported floor slabs <br /> must be properly placed and compacted. In most cases, suitable, non-organic, <br /> predominantly granular soil may be used for fill material provided the material is <br /> properly moisture conditioned prior to placement and compaction, and the specified <br /> degree of compaction is obtained. Material containing topsoil, wood, trash, organic <br /> material,or construction debris is not suitable for reuse as structural fill and should be <br /> properly disposed offsite or placed in nonstructural areas. <br /> Soils containing more than approximately 5 percent fines are considered moisture <br /> sensitive and are difficult to compact to a firm and unyielding condition when over <br /> the optimum moisture content by more than approximately 2 percent. The optimum <br /> moisture content is that which allows the greatest dry density to be achieved at a <br /> given level of compactive effort. <br /> Reuse of On-Site Soil <br /> The on-site soils are suitable for reuse as structural fill if properly moisture conditioned <br /> and compacted, and if allowed for in the project plans and specifications. A limited <br /> portion of the near-surface soils were slightly silty to silty. These soils may be difficult <br /> to properly moisture condition and compact during periods of wet weather. <br /> 7 <br />