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r <br /> Table 1. Estimated Depths to Stratigraphic Layers <br /> Stratigraphic Estimated Elevation Estimated Depth <br /> Layer of Top of Layer to Top of Layer <br /> Designation (feet msl) (feet bgs) <br /> Layer 1 15 Ground Surface <br /> Layer2 -45 60 <br /> Layer 3 -85 100 <br /> Corcoran Clay -185 200 <br />