It has been found that a fuel storage tank leak at the end of 2010 in Jackson, Tennessee, US, has contaminated surrounding soil.
Federal funds paid for the cleanup which took place over the past few weeks and included the removal of the tanks and a soil excavation.
Residents did not notice the leak and it did not contaminate the water, although there were further concerns that the tanks could have caused asbestos to spread which has the potential to cause lung disease and cancer.
However, the Jackson Field Office of the Tennessee Department of Environment and Conservation and the Division of Air Pollution Control have said there is no longer a cause for concern and that the fuel leak posed a greater risk than the threat of asbestos.
The storage tanks have since been removed and the underground wells tested. The tanks were more than 25 years old and it was thought that the age of the tanks may have been the cause for the leak.