About Superfund sites: According to a nation wide survey conducted by the Agency for Toxic Substance and Disease Registry,a branch of the U.S. Public Health Service, "uncontrolled hazardous waste sites are a major environmental threat to public health." The survey sites epidemiological studies which found that people living close to hazardous waste sites have increased incidence of birth defects, liver disease, as well as disorders of the immune and nervous systems. Unfortunately we know that there is a link between toxic waste sites and breast cancer. For example a nationwide survey of waste dumps and cancer incidence conducted from 1970 through 1979 found that breast cancer is increased in 339 U.S. counties that have hazardous waste sites and ground water contamination as compared with counties that do not have such sites (Jack Griffith and Wilson B. Riggan, "Cancer Mortality in U.S. Counties with Hazardous Waste Sites and Ground Water Pollution," Archives of Environmental Health Vol. 44, No. 2. March/April 1989 pgs 69-74).