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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />D. When existing ground surface has a density less than that specified for <br />particular area classification, break up ground surface, pulverize, <br />moisture-condition to optimum moisture content, and compact to required <br />depth and percentage of maximum density. <br /> <br />E. Place backfill and fill materials in layers of 8 in. loose depth for material <br />compacted by heavy compaction equipment, and 4 in. in loose depth for <br />material compacted by hand operated tampers. <br /> <br />F. Before compaction, moisten or aerate each layer as necessary to provide <br />optimum moisture content. Do not place backfill or fill material on <br />surfaces that are muddy, frozen, or contain frost or ice. <br /> <br />G. Place backfill and fill materials evenly adjacent to structures, without <br />wedging against structures or displacement of piping or conduit. <br />Compaction equipment used within 10ft. of buried walls and soil <br />supported structures shall not exceed 2000 Ibs. <br /> <br />3.04 GRADING <br /> <br />A. Grading Outside Building Lines: Grade areas adjacent to building lines to <br />drain away from structures and to prevent ponding and as follows: <br />1. Finish to within not more than 0.10 ft. above or below required <br />subgrade elevations. <br />2. Walks: Shape surface to line, grade and cross-section, with finish <br />surface not more than 0.10 ft. above or below required subgrade <br />elevation. <br />3. Pavements: Shape surface to line, grade and cross-section, with <br />finish surface 1/2 in. above or below required subgrade elevation. <br /> <br />B. Grading Surface of Fill under Building Slabs: Grade smooth and even, <br />free of voids, compacted as specified, and to 1/2 in. below required <br />elevation. <br /> <br />3.05 FIELD QUALITY CONTROL <br /> <br />A. Contractor will engage soil testing and inspection service for quality <br />control testing during earthwork operations. <br /> <br />B. Allow testing service to inspect and approve subgrades and fill layers <br />before further construction work is performed. <br /> <br />C. If in opinion of Engineer, based on testing service reports and inspection, <br />subgrade or fills which have been placed below specified density, provide <br />additional compaction and testing at no additional expense to Owner. <br /> <br />04/08 <br /> <br />02200-5 <br /> <br />06-5723 <br />