Attachment B - Report of Geotechnical Exploration Samson Oceanfront Park Revised

Home Browse Search

Report of Geotechnical Exploration November 7, 2014 Samson Oceanfront Park AREHNA Project B-14-124 5 | Page 4.4 Soil Permeability A percolation test was performed at the location shown on the Field Exploration Location Map in Figure 2 of Appendix A. The test was performed to determine the permeability of the soils at that location. The test was conducted in accordance with the SFWMD Constant Head “Usual Condition” Open Hole Test Method. The following table summarizes the results of the percolation test: Borehole Depth (ft.) Qp d H2 Ds KIV 10 0.09803 1 7.5 7.5 3.6E-04 Qp = stabilized flow rate (cfs) d = diameter of test hole (ft.) H2 = depth from test elevation to water table (ft.) Ds = depth of borehole below the water table (ft.) KIV = hydraulic conductivity (cfs/ft.2 – ft. head) 4.5 Groundwater Conditions The ground water level was encountered in the SPT boring at a depth of approximately 7.5 feet below the existing ground surface. Fluctuation in ground water levels should be expected due to tidal variations, seasonal climatic changes, construction activity, rainfall variations, surface water runoff, and other site- specific factors. Since ground water level variations are anticipated, design drawings and specifications should accommodate such possibilities and construction planning should be based on the assumption that variations will occur. 4.6 Estimated Seasonal High Ground Water Level Based on the mapping performed by the USDA, soils information obtained from the site and our experience in the area, we estimate that the seasonal high ground water level will be approximately 6 feet below existing grade.