2505 PACIFIC AVE 2018-01-01 MF Import

Sierra Construction Services, Inc. JN 92276 July 1 . 1992 Page 11 foundations and slabs for the existing structure also be removed. The stripped or removed materiais should not be mixed Nith any materials to be used as structural fill . Structural fill is defined as any fill piaced under the . building, behind permanent retaining or foundation walls, or in other areas where the underlying soils need to support loads. Geotech Consultants, inc, should observe site conditions during and after excavation prior to placement of eny structural fill . A1S structural fill should be placed in horizontal lifts with a moisture content at or near the optimum moisture content. The optimum moisture content is that moisture content Mhich results in the greatest compacted dry densiLy. The moisture content of fill soils is very important end must be closely controlled during the filling and compaction process. 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 lift. In no cese should the lifts exceed twelve (12) inches in loose thickness. The foliowing , tabte presents recommended relative compaction for structural fill : Minimum Relative location of Fill Pla �m.�r Compaction Beneath footings, slabs or 95� walkweys eehind retaining Malls gp� • Beneath pavements 95� for upper 12 inches oF subgrade, 90k below 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 Mith ASTM Test Designation D-1557-78 (Modified Proctor) . Use of On-Site Soils If grading activities take plece 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 GEOTECH CONSUITANTS, INC.