The Aerial Spray Grid is located 12 miles west southwest of Dog Area. It consists of two grids located approximately 160^o apart and having a common vertex. Located at this point is a 300-foot tower. Three radials, 20^o apart, extending from the tower in both directions form the two grids. Sampling on the 300 foot tower is accomplished by means of a vacuum line which is installed in ten-foot sections and raised to the top of the tower. A sample can be obtained at 1 meter increments. Remotely controlled portable sampling equipment is utilized to obtain sampling data on the three radials. Four 100-foot sampling towers are installed on the center radial of each grid. These are located 1/2 mile, 2 miles, 6 miles and l0 miles downwind from the 300 foot tower.

Extended downwind sampling may be conducted on the North grid through the use of two lines, 30 and 36 miles from the tower, utilizing portable, remote controlled sampling equipment. A helicopter is required to service this area as it lays in the salt flat region and is frequently not accessible by standard vehicle.

The 300' tower is of square construction, 8' per side. The vacuum line is raised to the top by means of an electrically operated hoist.  A 132 CFM vacuum pump supplies the vacuum source for this facility. Portable electrical generators are used as the power source.

The grid area is used primarily for the testing of biological munitions and dissemination devices.

Base of 300 Foot Tower

The following diagram illustrates the grid array of the Aerial Spray Grid indicating the basic grid, extended downwind sampling stations, peripheral sampling stations, flight lines and meteorological stations.