the presence of $^{90}$Sr in the San Francisco Bay Area. Authors involved in this study, A.R. Smith and E.B Norman, also performed similar measurements in California in the aftermath of the Chernobyl accident in 1986 which were never published formally, and are presented here in comparison to those on Fukushima. Last, due to extended reports and local concerns of contaminated water being leaked in 2013 into the ocean at Fukushima, a series of food measurements were performed in September of 2013 to search for fission products in fish and other food items from the Pacific region purchased at local Bay Area retail locations.

The Low Background Facility at Lawrence Berkeley National Laboratory
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The LBF at LBNL typically performs a variety of low background gamma spectroscopy services to a variety of experiments and end users. The LBF operates in two unique, low-background laboratory spaces: a local surface laboratory constructed of low-activity concrete; and an underground site with over 500 m.w.e (meters water-equivalent) overburden for shielding against cosmic ray muons. A primary component of its activities include low background counting of candidate construction materials for ultralow background experiments such as those searching for dark matter, neutrinos, and neutrinoless double beta decay 