Without feeling a strong connection to the nation, and knowing that their presence was only temporary, the full costs of disposing of sewage and waste fuel on the base was likely never calculated.
The cave formation has kept the oil somewhat contained and the now-abandoned base has not been opened to development for fear that the pollution may spread and have catastrophic costs.
The intricate systems, few of which have been explored and even fewer mapped, offer clues to Bermuda's geological past that may be forever erased should the oil spread deep into the caves.
During times of drought when house tanks are running dry this water is sold and delivered at roughly $60 per 1000 gallon truckload, giving it a value of $90,000 per day, and a present value of over $500 million, depending on the long-term interest rate.
Without providing an exact estimate the Ministry of the Environment has deemed the probability of this event to be significant and has urged that action be taken to secure the pollutants.
In addition Dr. Kent Simmons, chief scientist in charge of environmental programs at the Bermuda Biological Station for Research, notes that some amount of oil has already seeped into the ground water and is migrating[5] [6] Should the oil and fuel escape from their caves, the Ministry of Environment deems it probable that the underground freshwater lens would be contaminated and undrinkable.
The land cannot be developed in its current state as significant construction of any kind would likely disturb the oil filled cave and contaminate the underground freshwater lens.
Dr. Tom Sleeter, director of the Department of Environmental Protection reports that the cleanup is estimated to cost $14.75 million over the course of 24 months.