The purpose of this project is the Installation (drilling) of fourteen (14) Salt-Front Monitoring Wells (MWs) at different proposed locations along the east portion of Miami Dade County. Seawater encroachment continues to represent a major threat to the freshwater resources of coastal Miami-Dade County. The installation of these 14 wells will help to further delineate the extent of saltwater intrusion in areas where the saltwater front is currently estimated, to better define the saltwater front in areas where existing monitoring wells are already on the saltwater side of the front, and to better understand the hydrology of the Biscayne aquifer along the salt front. The objective of this project is to drill 14 salt front monitoring wells (SF 22-1 through SF 22-14), that can be drilled with a conventional drill bit but they must fully penetrate the Biscayne aquifer and have a stable and clean borehole for geophysical data collection. Sonic drilling will not be allowed in this project. Each well will be screened at the bottom of the deepest transmissive layer within the Biscayne aquifer, and additional sample tubes and filter packs may need to be installed in shallower flow zones, depending on the results of the geophysical logs. Due to unforeseen permitting time delays, the installation of the 14 wells may be delayed accordingly. The installation of the 14 saltfront monitoring wells will be as follows: 1. Drilling a 6-inch borehole to a depth of 95 feet (ft) below land surface (bls) for logging and to construct the well with a 2-inch polyvinyl chloride casing (PVC) casing. This well identification (ID) is shown as SF22-1 in Figure 1. 2. Drilling a 6-inch borehole to a depth of 121 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 2 in Figure 1. 3. Drilling a 6-inch borehole to a depth of 150 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 3 in Figure 1. 4. Drilling a 6-inch borehole to a depth of 150 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 4 (and alternate location for SF22-4) in Figure 1. 5. Drilling a 6-inch borehole to a depth of 161 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 5 (and alternate location for SF22-5) in Figure 1. 6. Drilling a 6-inch borehole to a depth of 260 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 6 in Figure 1. 7. Drilling a 6-inch borehole to a depth of 270 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 7 (and alternate location for SF22-7) in Figure 1. 8. Drilling a 6-inch borehole to a depth of 200 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 8 in Figure 1. 9. Drilling a 6-inch borehole to a depth of 280 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22- 9 (and alternate location for SF22-9) in Figure 1. 10. Drilling a 6-inch borehole to a depth of 135 ft bls for logging and to construct the well with a 2-inch PVC casing. This well ID is shown as SF22-10 in Figure 1.
