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Project No. JB -314 24 March 2003 Page 7 Building Pad backfill should be compacted a minimum of 88 percent relative compaction at a minimum of 3 percent over the optimum moisture content according to the latest ASTM test methods and procedures. General fill and trench backfill should be compacted a minimum of 90 percent relative compaction at a minimum oft percent over the optimum moisture content according to the latest ASTM test methods and procedures. For pavement areas, the upper 12 inches of subgrade soils should be scarified, moisture -conditioned as necessary, and recompacted to a minimum of 95 percent relative compaction. All import fill must be compacted to a minimum relative compaction of 90 percent of the maximum dry density and moisture -conditioned to a minimum of 2 percent over the optimum moisture content according to ASTM test methods and procedures. The import fill should be non -expansive, free of deleterious materials, and meet the requirements in Table 2. Samples of any proposed import fill planned for use on this project should be submitted to our representative for approval and appropriate testing no less than 4 working days before the expected delivery to the job site. Table 2 IMPORTED MATERIAL REQUIREMENTS Sieve Size Percent Passing 6 inches (150 mm) 100 4 inches (100 mm) 95- 100 # 200 5-25 Plasticity (PI) = 12 or less Liquid Limit (LL) = 30 or less Clay soils should not be allowed to dry out and crack. Any dried clay soils should be wetted until they reach acceptable moisture contents or they can be excavated and replaced with acceptable properly compacted fill. 6.2 Foundations 6.2.1 Conventional Foundation System If the earthwork recommendations included in this report are complied with, the proposed kiosk, canopy structure, and sign/monuments may be supported by conventional foundations established on compacted, engineered fill. Settlement kaKorbmocher Engineering, Inc.