Abstract: An apparatus is also described for reducing pollutant emissions into the surrounding air from storage of liquid materials in a tank having a cover which is movable in the vertical direction in the tank and moves along with the fill level of the liquid material being stored, wherewith an edge gap is present between the outer perimeter of the cover and the inner wall of the tank, which edge gap is filled with a sealing liquid which has a lower density than the liquid material being stored, and has a vapor pressure which is low in comparison to that of the liquid material being stored.

Abstract: The subject of the invention is represented by a process and a layout for feeding gas stored in a cavern storage facility into a consumer network, in which a high feed-out rate for removal of gas over a protracted period of time can be achieved by means of a multistage procedure by prescribing specific supply line paths between the individual storage caverns and the consumer network to be supplied and by coordinating removal of gas from the individual storage caverns at an originally high storage pressure to a minimum residual pressure which is still below the operating pressure in the consumer network, by means of suitably controlled shut-off valves in the connecting supply line system between storage caverns and consumer network, the only ancillar equipment provided being a compressor station also required for feeding gas into the storage caverns.