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4.5 Below Grade Walls <br /> We anticipate the new home will be a slab on-grade structure and do not anticipate below <br /> grade levels or below grade basement walls. Recommendations and estimated soil <br /> parameters for below grade walls can be provided if required or requested. <br /> 4.6 Exterior Slabs <br /> Exterior slabs will likely be underlain by non-frost-susceptible fill soils consisting of poorly <br /> graded sand soils. This being the case,it is our opinion that special subgrade improvements <br /> in excess of topsoil/vegetation stripping in advance of slab construction will not be required. <br /> However,we recommend sloping exterior slabs to cirain away from the homes. <br /> 4.7 Site Grading and Drainage <br /> The ordinary high water level of Lake Minnetonka is 929.4 feet.The lowest floor grade of the <br /> house should be at least 2 feet above the ordinary high water level of Lake Minnetonka. <br /> We recommend the site be graded to provide positive run-off away from the proposed <br /> buildings. We recommend landscaped areas be sloped a minimum of 6 inches within 10 feet <br /> of the building and slabs be sloped a minimum of 2 inches. In addition we recommend <br /> downspout�with long splash blocks or extensions for each house. <br /> 4.8 Utilities <br /> We anticipate that the utilities will be supported on granular soil (sand) following soil <br /> correction or native clay till soils which in our opinion are suitable for pipe support. We <br /> recommend removing all topsoil, organic, soft or other unsuitable soils, if encountered, <br /> beneath utilities prior to placement. <br /> We recommend bedding material be thoroughly compacted around the pipes. We <br /> recommend trench backfill above the pipes be compacted to a minimum of 95 percent <br /> beneath slabs and pavements, the exception being within 3 feet of the proposed pavement <br /> subgrade, where 100 percent of standard Proctor density is required. In landscaped areas <br /> we recommend a minimum compaction of 90 percent. <br /> Groundwater will likely be encountered between depths of about 3 to 4 feet below the <br /> ground surface. At typical pipe burial depths ranging from about 7 to 10 feet below the <br /> ground surface, we anticipate groundwater will be encountered during utility i.nstallations <br /> and dewatering will be required. <br /> 5.0 CONSTRUCTION CONSIDERATIONS <br /> 5.1 Excavation <br /> The upper fill and swamp deposits encountered in the borings do not meet the OSHA <br /> Classifiications for Type A, B or C soils. Temporary excavations in the swamp deposit soils <br /> 7 <br />