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Not that long actually. once the buildings are demolished, and the site cleared - all that's left is the underground storage tanks. The tanks are pumped full with a slurry of concrete. this forces any remaining fuel to the surface, where it's decanted into a tanker. The concrete-filled tanks are simply left to harden. Since the now unusable tanks are burried fairly deep anyway, the site is usualy just grassed over.

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11y ago

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