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FEB 14 '02 05 :33PM BRRUN INTERTEC <br />Drywall Supply, Inc. <br />BBXX- 02 -010A <br />January 29, 2002 <br />Page 8 <br />P.12/24 <br />The configuration and spacing of the Gcopiers will depend on the results of an analysis performed <br />by aeopiersmt Foundations — Midwest. We encourage you to contact Mr. Charles Allgood, Jr. of <br />that company at phone cumber (763) 592 -5340, to discuss using this foundation system. <br />C.3.d. Additional Analysis. In each case, we anticipate that additional deeper borings, soil tests <br />and analysis will be needed to provide specific recommendations for the foundation system selected. <br />C.4. Building Slabs <br />,CA.a. Support. Because of the underlying organic materials and the high potential for settlement, <br />we anticipate drat slabs would he structurally supported separately from the perimeter foundation <br />system. <br />Floating the slabs (that is, placing the slabs on a prepared subgrade atop the existing fill and organic <br />materials) could be considered. However, with the present information, it appears that settlement <br />and the risk of slab distress would be much higher than normal. <br />If floating the slabs is an option, surcharging the building areas should be considered to consolidate <br />the underlying compressible soils before constructing the slabs. Surcharging involves placing <br />additional soil in the building pad area to a height higher than design grade to induce settlement. <br />Once settlement has occurred, the surcharge Fill is then reproved and construction of the slab <br />proceeds normally. One of the requirements with a surcharge approach is that a waiting period be <br />established to allow the compressible soils to consolidate. <br />C.S. Support of Utilities <br />C.5.a. Subgrade Support and Preparation. Utility excavations will likely expose a variety of <br />soils including amixture of existing fill, wet, soft or loose silt and clay, and in some cases, organic <br />materials- Where wet, soft or loose sods are present in the excavations or the soils become <br />disturbed from construction equipment, we recommend replacing the soils below the pipes <br />