in order to continue to produce actual values for the decreasing activities of gamma-emitters rather than only upper limits. Through this strategy, activities over a range of 1000-fold per 24 hour collection period were documented for gamma-emitters from which the maximum observed count rate in diagnostic peaks were as low as 1 count per minute. Throughout the monitoring period, observed fallout isotopes include $^{131}$I (t$_{1/2}$ = 8.0 days), $^{132}$I (t$_{1/2}$ = 2.3 hours) ,$^{132}$Te (t$_{1/2}$ = 3.2 days),$^{134}$Cs (t$_{1/2}$ = 2.06 years), $^{136}$Cs (t$_{1/2}$ = 13.16 days) and $^{137}$Cs (t$_{1/2}$ = 30.07 years). A sample gamma spectrum from such an air filter is displayed in [**Figure \[fig:airfilter\]**]{}.

The overnight count of the filter collected on March 15-16, 2011 showed the initial presence of a very small peak at 364 keV, the most intense gamma emitted in the decay of $^{131}$I, but without any companion fission products could not provide unequivocal evidence to support official arrival. When alone, the $^{131}$I could have originated from a nearby source, such as a local hospital. The following day provided the full confirmation of fission products from Fukushima from a filter exposed March 16-17, in which $^{132}$Te and $^{131}$I were both observed. The filter collected 