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' <br /> 1. Under structures,pool,hat tub,building slabs,steps,and pavemeats,compact the <br /> � top 12 inches below subgrade and each layer o£backfill or filt material at 95}�srcent <br /> maximum dry density. <br /> 2. Under walkways, compact the top 6 inches below sabgrade and each layer of <br /> bacicfill or fill material at 95 percent maximum dry density. <br /> ' 3. Under lawn or unpaved areas,compact the top 6 inches below subgrade and each <br /> layer of backfill or fill material at 90 percent m�imum dry density. <br /> , 3.12 GRADING <br /> A. General: Uniformiy grade areas to a smooth sur£ace,free from irregular surface changes. <br /> CompIy with compaction requirements and grade to cross sections, lines, and elevations <br /> 1 indicated. <br /> 1. Provide a smooth transition between existing adjacent grades and new grades. <br /> ' 2. Cut out soft spots,f ll low spots,and h im high spots to conform to required surface <br /> tolerances. <br /> B. Site Grading: Slope grades to direct water ar�vay from buiidings(See Drawings and 3.10 A <br /> , above)to prevent ponding. Finish subgrades to required elevations within the following <br /> tolerances: <br /> ' I. Lawn or Unpaved Areas: Plus or minus Q.10 foot. <br /> 2. Walks: Plus ox minus 0.10 foo� <br /> 3. Pavements: Plus or minus 1/2 inch. <br /> ' C. Grading Inside Building Lines: Futish subgrade tolerance to 1/2 inch when teste�with a <br /> i 0-ft straigirtedge. <br /> ' 3.13 SUBBASE AND BASE COURSES <br /> A. Under pavements arnd walks,place subbase course material on prepared subgrades. Place <br /> base course material over subbases to pavements. <br /> � 1. Compact subbase and base courses at optimum moist�re content to requir�l grades, <br /> lines,cross sections and thiclrness to not less than 95 percent of ASTM D 4�54 <br /> 1 relative density. <br /> 2. Shape subbase and base to required crown elevations and cross-slope grades. <br /> 3. When compacted subbase or base course thickness is 6 inches or less, place <br /> materials in a single layer. <br /> 1 4. When thickness of compacted subbase or base course exceeds 6 inches, plac8 <br /> materials in equal layers, with no layer more than 6 inches tluck or less than 3 <br /> inches thick when compacted. <br /> ' 3.14 PROTECTION <br /> A. Protecting Gzaded Areas: Protect newly graded areas from traffic,freezing,and erosion. <br /> ' Keep free oftrash and debris. <br /> B. Protecting axisting site marked vegetation and drawing tnarked vegetation: Protect e�sting <br /> ' trees,shrubs,Etc.from damage within grading limits <br /> C. Repair and re-establish grades to specified tolerances where completed or partially <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 material to depth directed by the Architec�reshape <br /> � and recompact at optimum moisture content to the required density. <br /> EARTHWORK Page 5 of b <br /> � <br />