The Niagara County field where the samples were taken is believed to have been the site of open-air burning of radioactive material in the 1950s, according to a 2016 Corps report.

1960 Topics Fairfield County (Ohio), Soil mapping Collection usda-soil-surveys; usdanationalagriculturallibrary; fedlink; usda-ohio Language English Item Size 452.5M Soil Survey Fairfield Ohio ...