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' <br /> 1. Under structures,pool,hot tub,building slabs,steps,and pavements,compact the <br /> ' top 1 Z inches below subgrade and each iayer of backfilI or filt material at 95 percent <br /> maximum dry density. <br /> 2. Under walkways, compact the top 6 inches below subgrade and each layer of <br /> bacicfill or fiIl material at 95 percent maximum dry density. <br /> , 3. Under lawn or unpaved areas,compact the top 6 inches below subgrade and each <br /> Iayer of backfill or fiil material at 90 percent maximum dry density. <br /> ' 3.12 GRADING <br /> , A. General: Unifarmly grade areas to a smooth surface,free from irregular surface changes. <br /> Comply with compaction requirements and gcade to cross sections, tines, and elevations <br /> ' indicated. <br /> 1. Provide a smooth transition between existing adjacent grades and new grades. <br /> ' 2. G�#out soft spots,fiIl law spots,and trim high spots to conform to required surface <br /> tolerances. <br /> B. Site Grading: Slope grades to direct water ar�vay from buildings(See Drawings and 3.1 Q A <br /> ' above)to prevent ponding. Finish subgrades to required elevations within ttie following <br /> tolerances: <br /> ' I. Lawn or Unpaved Areas: Plus or minus 0.10 foot. <br /> 2. Wallcs: Plus or minus 0.10 foo� <br /> 3. Pavements: Plus or minus I/2 inch. <br /> ' C. Grading Inside Building Lines: Finish subgracie toleranc8 to i/2 inch when tested with a <br /> 10-ft straightedge. <br /> ' 3.13 SUBBASE AND BASE COURSES <br /> A. Under pavements and walks,place subbase course material on prepared subgrades. Place <br /> base course material over subbases to pavements. <br /> ' 1. Compact subbase and base couises at optimum moisture content to required grades, <br /> lines, cross sections and thickness t�not less thaa 95 percent of ASTM D 4254 <br /> ' relative density. <br /> 2. Shape subbase a�ad base to required crown eievations and crass-slope grades. <br /> 3. When compacted subbase or base course thickness is 6 inches or less, place <br /> materials in a single layer. <br /> � 4. When thicicness of compacted subbase or base course exceeds 6 inches, place <br /> materials in ec�ual layers, with no layer more than 6 inches thick or less than 3 <br /> inches thick when compacted. <br /> ' 3.14 PROTECTION <br /> A. Protecting Graded Areas: Protect newly graded areas from traffic,freezing,and erosion. <br /> ' Keep free of trash and debris. <br /> B. Protecting existing site marked vegetation and drawing marked vegetation: Protect existing <br /> , trees,shcubs,Etc.from damage within grading limits <br /> C. Repair and re-establish grades to s�cified tolerances where completed or paztially <br /> completed surfaces become eroded,rutted,settled,or lose compaction due to subsequent <br /> ' construction operations or weather conditions. <br /> 1. Scarify or remove and replace materiai to depth directed by the Architect;reshape <br /> , and recompact at optimum moisture content to the required density. <br /> EARTi-iWORK Page 5 of 6 <br /> ' <br />