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� <br /> , <br /> � <br /> � Backfill excavations as promptly as work permits, but not until completion of the <br /> followin�: <br /> Acceptance of construction below finish grade including, where applicable, <br /> � dampproofing, waterproofing, and perimeter insulation. . <br /> Inspection, testing, app�oval, and recording locations of underRround utilities. <br /> � Removal of conc•rete formwork. <br /> � Removal of shocing and bracing, and backfilling of voids with satisfactory <br /> materials. Cut off temporary sheet piling driven below bottom of structures and <br /> remove in manner to prevent settlement of the structure or utilities, oc leave in <br /> place if required. <br /> � Removal,of trash and debris. <br /> � Permanent oc temporary horizontal bracing is in place on horizontally supported <br /> walls. <br /> Ground Surface Preparation: Remove veRetation, debcis, unsatisfactory soi! maierials, <br /> ' obstructions, and deleterious materials from ground surface prior to placement of fills. <br /> Plow, strip, or break-up sloped surfaces steeper than 1 vertical.to 4 horizontal so that <br /> fill material will bond with existinA surface. <br /> rWhen existing ground surface has a density less than that specified under "Compaction" <br /> for particular area classification, break up Rround surface, pulverize, moisture-condition <br /> to optimum moisture content, and compact to required depth and percentage of <br /> jmaximum density. � <br /> Placement and Compaction: Place backfill and fill materials in layers not more than 8" <br /> � in loose depth for material compacted by heavy compaction equipment, and not more <br /> than 4" in loose depth for material compacted by hand-operated tampers. <br /> Before compaction, moisten or aerate each layer as necessary to prov'ide optimum <br /> � moisture content. Compact each layer to required percentage of maximum dry density <br /> oc relative dry density for each area classification. Do not place backfill or fill material <br /> on surfaces that are muddy, frozen, or contain frost or ice. <br /> � Place backfill and fill materials evenly adjacent to stcuctures, piping oc conduit to <br /> required elevations. Take care to prevent wedging action of backfill against structures <br /> or displacement of piping or conduit by carrying material uniformly around structure, <br /> � piping or conduit to approximately same elevation in each lift. <br /> 3.04 GRADING: <br /> � <br /> EARTHWORK 02200 - 7 <br /> � . <br /> � <br />