Appendix_3_pages.pdf

The document is a comprehensive set of borehole logs and recovery well construction diagrams for multiple landfill sites, including the Central Landfill, Santa Rosa Class III Landfill, and Holley Landfill, all located in Florida and managed by Santa Rosa County Environmental Control and Solid Waste Department. The logs detail the geological composition, drilling dates, and well construction specifications for several monitoring wells (RW-1 through RW-9), with each well featuring a total depth ranging from 80 to 185 feet, a nominal borehole diameter of 8-10 inches, and consistent construction elements such as a concrete pad, PVC well casing, bentonite seal, silica sand filter pack, and Type 1 Portland Cement grout. The wells were drilled between 1999 and 2013 by contractors including Gulf Atlantic Drilling, Kelly Environmental Drilling, and Pro-Sonic Drilling, with geologist Julian C. Cooey, P.G., overseeing the projects.

The recovery well construction diagrams provide standardized technical specifications, including a 10-inch surface casing, 3-inch diameter flow pipe, 6-inch flush threaded PVC well with a 3 HP pump, and a well screen typically 6 inches in diameter with a 0.020-inch mill slot spanning 20-30 feet long. Depth to groundwater varied between 30-38 feet below land surface, and each well was developed using in-place submersible pumps, with evacuated volumes ranging from 350 to 1,000 gallons. The geological logs reveal a consistent stratigraphy of silty sands, varying colored sediments (tan, brown, white, reddish), and occasional clay and silt layers, indicating a complex but relatively uniform subsurface environment across the different landfill sites.