The previous two tests had indicated that the produced natural gas would be too radioactive for safe use; the Rio Blanco test found that the three blast cavities had not connected as hoped, and the resulting gas still contained unacceptable levels of radionuclides.
The produced natural gas would be too radioactive for safe use. This was what the previous two tests had indicated. The three blast cavities had not connected as hoped. The Rio Blanco test found this. The resulting gas still contained unacceptable levels of radionuclides.