This is the simpler of the two questions. A safe level of radon gas is no radon gas. Radon gas is a carcinogen which causes lung cancer. The US EPA has put it plainly, stating, Any radon exposure has some risk of causing lung cancer.The lower the radon level in your home, the lower your family's risk of lung cancer..hile no level of radon gas is completely safe, as with most things in life we must balance the benefits and costs to find our own acceptable levels. We walk outside and work in the sun, exposing ourselves to ultraviolet radiation and increasing our risk of developing skin cancer.
Photo courtesy of the DC SHPO. The Old Stone House, located at 3051 M Street in Georgetown, was built in 1765, making it the oldest standing building in Washington, DC. The exterior of the house is constructed of locally quarried blue granite.
The original Inn, which closed in 1969, was located at 51â53 Christopher Street, between West 4th Street and Waverly Place. The Stonewall reopened in 1972 under the same management on 22nd Street in Miami Beach but burned down 2 years later. In 1990 a bar called Stonewall opened in the western half of the original Manhattan location (53 Christopher Street). This was renovated and returned to its original name, The Stonewall Inn, in 2007.