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MW <br />Page 12 - #120-10689 <br />Usage of On -Site Materials for Controlled Fill <br />A substantial cut will be required in the area of boring 4-83. Below a <br />depth of about 3' at this boring location, the soils are primarily <br />clean sands. These soils should be suitable material for compacted <br />fill within the building area, exterior backfill, and also as subgrade <br />material in parking and roadway areas. In our opinion,the existing <br />fill encountered in the area of boring 1-83 would not be suitable for <br />reuse as compacted fill in areas other than lawn areas. <br />Parking and Roadway Areas <br />As previously discussed, it is generally not economically feasible to <br />remove swamp deposits in parking and roadway areas and replace them <br />with compacted fill. In our opinion, it should be feasible to prepare <br />the parking and roadway areas by placing a minimum 3' thickness of <br />compacted granular soil in parking and roadway areas and surcharging <br />these areas with at least 5' of fill for a period of about six months. <br />It is our judgment the 3' of compacted granular soil below the pavement <br />section should provide a stable subgrade and the 5' surcharge should <br />effectively reduce post paving settlement to tolerable levels. This <br />procedure however does involve some risk and some post construction <br />settlement may occur. We also recommend that the paved areas be <br />provided with a minimum of 1.5% slope to provide positive drainage even <br />if some differential settlement does occur. <br />SOIL GXPLORation <br />