Construction of the ground or underground storage tanks arranged, in particular, oil tanks, and with means to prevent ground water contamination in the event of leakage.

摘要

An oil storage tank above ground level rests on porous layers surrounded by an airtight vertical partition wall. A vacuum pump and a vacuum container outside are connected by a pipe to the centre of the concave tank bottom so that a vacuum can be created under it to extract air, ground water and any leakage oil. This is a simple and reliable method of eliminating any contamination of ground water supplies.