Marin County, the epicenter of the sudden oak death disease that has devastated oak groves in California and Oregon, could now be the site of the trees’ salvation. Scientists at the National Ornamental Research Site at Dominican University in San Rafael unveiled breakthrough “green” technology on Tuesday that uses a commercial steamer to heat soil to 122 degrees, effectively killing the pathogen. “It’s low-tech and high impact,” principal investigator Sibdas Ghosh said. The research site…