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SUBSURFACE EXPLORATION <br /> LOT 2, BLOCK 1 <br /> KELLY 2nd ADDITION <br /> ORONO, MINNESOTA <br /> ALLIED No. 94117 <br /> 2. FILL PLACEMENT <br /> In order to provide suitable conditions for the placement of concrete and reinforcing steel, <br /> a minimum thickness of clean granular fill should be placed to provide a working surface. Any <br /> additional fill, (including the under slab and bac�ll areas), should be placed and compacted in <br /> a controlled manner. Fill material should be mineral soil, preferably well graded and granular, <br /> free of debris, boulders and organic material. We recommend the use of fill material meeting <br /> the requirements of MN/DOT specification 3149 for granular bonow. <br /> As mentioneri previously, the floor slabs for the building should be supported structurally <br /> on the piles. To minimize moisture transfer from the underlying soils to the floor slab, we <br /> recommend a minimum 6" thick layer of free draining granular fill. This material should <br /> conform with the gradation requirements of Mn/DOT 3149.2 for Fine Filter Aggregate which <br /> are as follows: <br /> SIEVE PERCENT <br /> IZE PASSING <br /> 3/8" 100 <br /> No.4 90-100 <br /> No.10 45-90 <br /> No.40 15-45 <br /> No.200 0-3 <br /> All fill should be placed and compacted in a manner that will achieve complete <br /> compaction of the entire fill layer, (including any oversize areas), to a minimum of 98% of the <br /> Standard Proctor Density, (ASTM D: 698), in the under slab, footing and backfill. For smaller <br /> 7 <br />