Hydrocarbon pollution control method for rehabilitation of e.g. ground in industrial zones, involves closing opened valve and opening closed valves when pressure increases towards atmospheric pressure and exceeds predefined threshold

摘要

The method involves connecting aspiration pipes (1) to a common aspiration manifold (17). The manifold is connected to an air/water/float separation tank (4). The absolute vacuum pressure created by an evacuation pump (13) in the manifold is measured. The programmed automaton is implemented such that only one valve is opened for aspiration in the corresponding well, while other valves are closed. The opened valve is closed, and the closed valves are opened, when the pressure increases towards atmospheric pressure and exceeds a predefined depression threshold. An independent claim is also included for a device for hydrocarbon pollution control of ground and underground by aspirating fluid.