Naval Air Station Jacksonville

 NASJAX home

Operable units:

• Operable Unit 1 (OU1)—Landfill
• Operable Unit 2 (OU2)—Wastewater treatment plant
• Operable Unit 3 (OU3)—Naval Aviation Depot
• Operable Unit 6 (OU6)—Hangar 1000

Hydrologic Investigations at Naval Air Station Jacksonville (NASJAX)

USGS research began at NASJAX with the development and calibration of a one-layer regional groundwater flow model that simulates steady-state flow in the surficial aquifer (Davis and others, 1996). This model uses the USGS Modular Three-Dimensional Finite-Difference Groundwater Flow Model (MODFLOW) software as described in McDonald and Harbaugh (1988). The regional model has 240 rows and 290 columns with a uniform cell size of 100 by 100 ft (feet) and simulates steady-state flow for the entire Station and some surrounding areas. The model has been used subsequently to determine the direction and velocity of groundwater flow throughout NASJAX and to determine boundary conditions of telescoped models of smaller areas (Operable Units, for example) on the base.

NASJAX Framework

• Mission: to provide aerial anti-submarine warfare support, aviator training, and aircraft maintenance -- military activities conducted at NASJAX since 1909
• Support facilities: airfield, maintenance depot, Navy hospital, Navy supply center, and recreational and residential facilities
• NASJAX placed on the U.S. Environmental Protection Agency's (EPA) National Priorities List in December 1989 -- participating in the U.S. Department of Defense Installation Restoration Program
• Entered into a Federal Facility Agreement with the EPA and the Florida Department of Environmental Protection on October 23, 1990 designating Operable Units 1, 2, and 3

Operable units—associated research

• Operable Unit 1 (OU1) -- landfill
• Operable Unit 2 (OU2) -- wastewater treatment plant
• Operable Unit 3 (OU3) -- Naval Aviation Depot
• Operable Unit 6 (OU6) -- Hangar 1000

Reference list

Davis, J.H. (2007), Fate and Transport Modeling of Selected Chlorinated Organic Compounds at Operable Unit 1, U.S. Naval Air Station, Jacksonville, Florida: U.S. Geological Survey Scientific Investigations Report 2007-5043, 43 p.

Davis, J.H. (2003), Fate and Transport Modeling of Selected Chlorinated Organic Compounds at Hangar 1000, U.S. Naval Air Station, Jacksonville, Florida: U.S. Geological Survey Water Resources Investigation Report 03-4089, 61 p.

Davis, J.H., (2000), Fate and transport modeling of selected chlorinated organic compounds at Operable Unit 3, U.S. Naval Air Station, Jacksonville, Florida: U.S. Geological Survey Open-File Report 00-255, 36 p.

Davis, J.H. (1998), Ground-water hydrology and simulation of ground-water flow at Operable Unit 3 and surrounding region, U. S. Naval Air Station, Jacksonville, Florida: U. S. Geological Survey Open-File Report 98-68, 36 p.

Davis, J.H., Planert, M., and Andrews, W.J. (1996), Simulation of ground-water flow at the U. S. Naval Air Station, Jacksonville, Florida, with an evaluation of changes to ground-water flow caused by proposed remedial designs at Operable Unit 1:U.S. Geological Survey Open-File Report 96-597, 47p.