9300 W MALL DR 2018-01-01 MF Import

G & M Investments November 11, 1993 P-3161 Page 10 Structural fill is defined as any fill placed under the building, behind permanent retaining or foundation walls, or in other areas where the underlying soils need to sugport loads. Geotech Consultants, Inc. should observe site conditions during and after excavation prior to placement of any structural fill. All structural fill should be placed in horizontal lifte with a moisture content at or near the optimum moisture content. The optimum moisture content is that moisture content which results in the greatest compacted dry density. The moisture content of fill soils is very important and must be closely controlled during the filling and compaction proceas. The allowable thickness of the fill lift will depend on the material type, compaction equipment used, and the number of passes made to compact the 1ift. In no case should the lifts exceed twelve (12) inches in loose thickness. The following table presente recommended relative compaction for structtiral fill: Location of Fill Placement Beneath footings, slabs or walkways Behind retaining walls Minimum Relative Comoaction 95� 90$ Beneath pavements 95$ tor upper 12 inches of subgrade, 908 belo�a that level Where: Minimum Relative Compaction is the ratio, expressed in percentages, of the compacted dry density to the maximum dry density, as determined in accordance with ASTM Test Designation D-1557-78 (Modified Proctor). Use of On-Site Soils If grading activities take place during wet weather, or when the silty, on-site soils are wet, site preparation costs may be higher because of delays due to rains and the potential need to import granular fill. The on-site soils are generally silty and thus are moiature GEOTECH CONSULTANTS, INC.