[en] Automatic translation: Maintenance and modification work was carried out in January and February. The inspection of some parts of the plant was of particular importance any tar deposits that may have accrued, as - as in the quarterly report 4/1979 and described in detail in the 1979 annual report - for the first time in December 1979 Untreated gas flame coal Westerholt via the jet feed into the gas generator had been dosed. No tar deposits could be found in the inspected parts of the system, such as compressed gas coolers, washers or raw gas lines. As part of the modification work, the coal storage bunker was given the task of blasting replaced by a container of larger storage capacity. It had been shown that the previous container too often because of its insufficient capacity had to be filled, which lost valuable experimental time. The container exchange also made some renovation work on the coal conveyor line and on their connecting cables.