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414 Carter Associates. Inc. Round Island Oceanside Park IMproven writs S.R. A•1 •A December 3, 1997 !F 40 The cone penetrometer resistances are relatively consistent, indicating generally medium dense to dense conditions to the termination depth of the soundings. The depth to the groundwater was more than 6.0 feet below existing grade except at the HC location where the water table was at 5.0 feet, FOUNDATION RECOMMENDATIONS For bearing capacity considerations, the depth of concern is generally about one to one, and a hall footing width below the bottom of the footing. As noted above, there are some foosb soils in the upper few feet. Densification of these loose, soils can be accomplished by proof rolling in accordance with the applicable sections of Attachment A. We recommend that a soils technician be on site to verify that proper densification has been achieved prior to placement of any fill. Using a conservative cane resistance of 40 tons per square foot, we calculate that a bearing pressure of 2,500 pounds per square foot will provide a fac-tor of safety of three for bearing capacity. This is a commonly accepted factor of safety for bearing capacity analysis. As a result, we would recommend using a design bearing pressure of 2,500 p.s.f. for all footings for full dead and live loading. Reinforcement for footings should be proportioned to meet the requirements of ACI .31€3, latest edition, and other applicable codes. Settlement calculations were made using the prepared site conditions loadings presented in the foundation recommendations above. With the site prepared and the foundations designed and constructed as recommended, we anticipate settlements of 112 inch or less and differential settlements of 112 inch or less. All site preparation, any excavation and backfilling required during sine preparation, fill placement, and excavation for footings should be in accordance with Attachment A. PAVEMENT SECTIOiV Based on the subsurface investigation, the soils are suitable to support the anticipated roadway and parking loads using typical pavement profiles. Construction of the pavernent section should conform to the latest MOT specifications. The following is our recommended pavement section: 1 inch 51 or S3 Asphalt 6 inches cemented coquina or limerocl from a Florida DOT approved pit, compacted to 98% density per ASTM D-1557. 8 inches stabilized subgrade stabilized to 50 FFV and compacted to 96% density per ASTM D-1557. General site preparation should be performed in accordance with Attachment A.