It’s on television. It’s in the newspapers. It’s on billboards.
Portland, Vancouver, Salem, and points between have a radon issue–one that has been here for thousands of years–and one that is not going away. The soil in the Willamette Valley, much of Clark County, and up and down the Columbia River Gorge contains granite, Ice Age … Read More.
Portland and Vancouver have a radon issue–
one that has been here for thousands of years–and it is not going to go away. The soil in the Willamette Valley, much of Clark County, and the Columbia River Gorge has a granite component, Ice Age material brought down the Columbia River from Montana repeatedly between 10,000 and … Read More.