Thomas'
- 'E.B. Norman'
- 'D.L. Hurley'
- 'B.T. Lo'
- 'Y.D. Chan'
- 'P.V. Guillaumon'
- 'B.G. Harvey'
bibliography:
- 'bibtex.bib'
title: 'Measurements of Fission Products from the Fukushima Daiichi Incident in San Francisco Bay Area Air Filters, Automobile Filters, Rainwater, and Food'
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Fukushima Daiichi Nuclear Power Plant, Fukushima, fallout, air monitoring, rainwater, automobile filters, Chernobyl

Introduction
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Since the early 1980’s, the Low Background Facility (LBF) at Lawrence Berkeley National Laboratory (LBNL) has been analyzing laboratory environmental air sampler filters for the presence of any gamma-emitters, such as naturally occurring, $^{7}$Be and $^{210}$Pb. After the announcement of the accident at the Fukushima Daiichi Nuclear Power Plant, detailed monitoring began to search for fallout isotopes in environmental air filters at the local LBF station at LBNL and in rainwater in Oroville, CA. Several other groups have reported similar Fukushima-related measurements in air filters and rainwater in the U.S. [@Norman2011; @Bandstra2011; @Leon2011; @MacMullin2012; @Biegalski2012]. The fallout also provided a demonstration for a pilot program in monitoring fallout isotopes in automobile filters, which are also continuously monitored by the LBF. An additional analysis was later performed upon rainwater collected in the spring of 2011 in an effort to search for 