The primary contaminants found were radium-226
, uranium-238 and uranium-235.
Lead-210 and radium-226
take around 100 years to reach this equilibrium.
We are troubled by people drinking water that [could potentially have] radium-226
in it," says David Brown, a public health toxicologist with the Southwest Pennsylvania Environmental Health Project.
Flowback water also picks up natural contaminants from underground such as radioactive Radium-226
and the ReFINE project will look at the potential concentrations of these compared to other fossil fuels and the nuclear industry.
The plant does not test for gamma-emitting radionuclides and radium-226
on a daily basis, he reported.
The truck was carrying highly radioactive radium-226
in concentrations 86 times higher than allowed per EPA limits.
Up until 1959, the MoD dumped radium-226
contained in the luminous paints used in old aircraft instruments in the area when they were repairing and salvaging old planes.
All its isotopes are highly radioactive, and its most stable one, radium-226
, decays into radium gas.
While indications are that flow-back fluid from hydraulically fracturing the Marcellus Shale in the northeast, including Pennsylvania, can contain elevated levels of radium-226
, Oil and Gas Division Commission staff inform me that they have no indication that radium-226
levels are above regulatory levels in the Barnett Shale or the Eagle Ford Shale in Texas, which are geologically different shales than Pennsylvania Marcellus shale.
New York's Department of Environmental Conservation analyzed 13 samples of wastewater brought to the surface from drilling and found that they contained levels of radium-226
as high as 267 times the limit for safe discharge into the environment, and thousands of times more than the federal limit for human consumption.
Excessive barium and radium-226
in Illinois drinking water.
During the 1980s and early 1990s, elevated concentrations of radium-226
and radon-222 in groundwater wells and tap water were reported in Harris County, Texas, particularly in the northwest.