during March 17-18, 2011 showed the highest activities observed for $^{131}$I and $^{132}$Te, at 14.3$\pm$0.1 mBq m$^{-3}$ and 20.9$\pm$0.1 mBq m$^{-3}$ respectively, as well as the first peak in their temporal distributions. The filter collected from March 23-24 exhibited the second highest $^{131}$I and $^{132}$Te activities, at 12.5$\pm$0.1 mBq m$^{-3}$ and 1.44$\pm$0.03 mBq m$^{-3}$ respectively, and may represent the Òsecond lapÓ of the most radioactive plume as it passed by California again. Note all uncertainties listed here are statistical only, and a $\sim$10% systematic uncertainty should be assumed as well. The relative temporal and absolute airborne activities based upon the air filter measurements are shown for the full duration of the LBF’s Fukushima fallout monitoring activities through the end of 2012 in [**Figure \[fig:allfalloutfull\]**]{}. Not plotted are $^{136}$Cs, since it only was present on a small amount of filters, and $^{132}$I, since it is the short-lived daughter of $^{132}$Te. The activities of $^{210}$Pb and $^{7}$Be, both naturally occurring radioisotopes found in the air, are shown in [**Figure \[fig:pbbe\]**]{}. The natural isotopes can be used as a comparison to the Fukushima fallout in [**Figure \[fig:allfalloutfull\]**]{} to demonstrate that the observed fission radioisotope activities at the LBF station were, briefly at their 