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<br /> I .uGI-UI-~1 IUt UC:'48 ri'l WtL::>H GU rM IiU. ~c:o IIJ4 r. UJ <br /> I Welsh Construction <br /> 8200 Normanclale Boulevard, Suite 200 <br /> ft Minne.poli" Minnesota 55437-1060 <br /> 612.897.7860 Fax 612.897.7868 <br /> MEMORANDUM <br /> I October 7,1997 <br /> I To: o;,k Z,brio, f! <br /> From: Jim TOdry <br /> I <br /> Re: Phase II Soil Correction <br /> I Based on the soil conditions indicated by the soils report prepared by Braun Intertec, all <br /> I vegetation and topsoil should be removed before placement of fill, footings or floor slabs. <br /> Excavation of existing fill and soft to rather soft clays will also be required to limit settlements. <br /> Grading in the pavement areas should include stripping the vegetation and highly organic soils, <br /> I and removing soft clays within 3 feet of subgrade elevation before placing the fill and the <br /> pavement materials. <br /> Ie According to the site plan, some areas will be cut to grade to reach proposed floor elevations. At <br /> those locations, subexcavations wil! be needed to remove soft clays. Because these soils have <br /> relatively high moisture contents, it will be necessary to aerate and dry these soils before <br /> I placement and compaction. <br /> Wet and waterbearing soils were observed in some borings and water will likely accumulate in <br /> I the excavation bottoms, particularly where waterbearing sand layers are unearthed during site <br /> grading and footing excavation. Dewatering may be necessary during excavation and prior to <br /> backfilling. Because the primary soils at this site are clay, we anticipate it will be possible to <br /> I remove the water in footing trench excavations by pumping from temporary sumps in the <br /> excavation bottom. During general site grading operations, trenching may be needed to dewater <br /> and route water seepage away from the construction area, <br /> I <br /> I <br /> I xc: Greg Anderson <br /> I <br /> .. <br /> I <br />