Hydraulic Barrier Geotechnical Investigation

Beginning in 2004 and again in 2006 Subsurface Evaluations was contracted to evaluate the subsurface conditions along a proposed hydraulic barrier located adjacent to a stone quarry in Sumter County Florida. The main thrust of the project was two-fold; first was to get an idea of what types of soils were present in the area of concern and also to locate any possible karst features that may adversely affect the performance of the barrier. SEI proceeded to address the needs of the client with a multi-tool geophysical survey. The survey area was large, in fact over 28,000 linear feet of data was acquired, and geologic conditions were known to change laterally across the terrain. Knowing this and bearing in mind the ultimate goals of the client, SEI decided to use two geophysical methods, where the weak points of first method (CCR) would coincide with the strong points of the second method (GPR) and vise versa.  The fact that soil conditions ranged from sands (resistive) to clays (conductive) made for the perfect marriage of radar and resistivity------the results were excellent.

One of the unique aspects of Subsurface Evaluations is our ability to field multiple geophysical instruments on the same project. It is common knowledge in the geophysical community that multiple methods are superior to single method surveys, so long as the proper methods are combined so as to produce a situation where one data set compliments the other. Oftentimes geophysical providers are limited either by the gear they possess or their level of experience with different types of geophysical instruments. At Subsurface Evaluations we own and maintain the gear on the premises and routinely deploy a range of instruments and competent staff to survey areas throughout North America.