The average distance from the center of the site to the each of the perimeter locations at the boundary is 14500 m. In Fig. 2, Reactor Areas are noted as C, K, L, and P and Separations Areas are noted as F and H. Release amounts for each of the years are shown in Table 1 which also shows a breakdown of percentage release from reactors and separations. Measured air concentrations at the various monitoring locations are shown in Table 2. 3 shows the frequency of each stability class for each of the years. Since relatively little variation is seen, using the most recent years data is appropriate.
Error bars represent standard deviations of the data that was averaged.
There is little difference from using the various lengths of JFD s except for a slight increase when the 10-yr JFD is used. Meteorological data capture has greatly improved with instrumentation upgrades in the late 1980 s and is possibly the reason that concentrations calculated with the 10-yr JFD show a slight difference. The variances from measurement year to year are likely due to environmental factors such as humidity. In 1995 the site went from using quarterly humidity values to biweekly humidity values, and this is likely the reason for greater agreement during the 1995-1996 time frame. In 1994 only one value was used for humidity for the entire year due to sampling problems.