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<br />o <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 />m <br />I <br />I <br />I <br /> <br />3.02 COMPACTION <br /> <br />A. Areas to be compacted shall be moistened and compacted by either <br />rolling, tamping or any other approved method by the Engineer in order to <br />obtain the desired density. The Contractor shall inspect all compacted <br />areas prior to further construction operations to ensure that satisfactory <br />compaction has been obtained. All backfill adjacent to structures and <br />pipes, shall be compacted to a density of not less than 100 percent of the <br />maximum density as determined by AASHTO T-99. Density tests are <br />required, such tests shall be made as directed by the Engineer at the <br />expense of the Contractor. The Contractor shall instruct the testing <br />laboratory to forward copies of all test reports to the Engineer. <br /> <br />B. Remove and replace, or scarify and air dry, soil material that is too wet to <br />permit compaction to specified density. <br /> <br />3.03 BACKFILL AND FILL <br /> <br />A. Place specified soil material in layers to required subgrade elevations: <br />1. In excavations, use satisfactory excavated or borrow material. <br />2. Under grassed areas, use satisfactory excavated or borrow <br />material. <br />3. Under walks and pavements, use subbase material, or satisfactory <br />excavated or borrow material, or combination of both. Place <br />shoulders along edges of subbase course to prevent lateral <br />movement with satisfactory excavated or borrow material. <br />4. Under steps, use subbase material. <br />5. Under building slabs, use drainage fill material. <br />6. Under piping and conduit, use subbase material where subbase is <br />indicated under piping or conduit; shape to fit bottom 90 degrees of <br />cylinder. <br /> <br />B. Backfill excavations as promptly as work permits, but not until completion <br />of the following: <br />1. Acceptance of construction below finish grade including <br />waterproofing and perimeter insulation. <br />2. Inspection, testing, approval, and recording locations of <br />underground utilities. <br />3. Removal of shoring and bracing, and backfilling of voids with <br />satisfactory materials. <br /> <br />C. Remove vegetation, debris, unsatisfactory soil materials, obstructions, <br />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 <br />horizontal so that fill material will bond with existing surface. <br /> <br />04/08 <br /> <br />02200-4 <br /> <br />06-5723 <br />