A number of new findings can be derived from the data obtained. After the initial drop, the water content stabilized at about 30% wt. This finding is likely to correspond to the groundwater level. An unexpected decrease in its content of about 3 to 5 m to about half of the depths from 12 m can be considered unexpected. The CaO concentration decreases from about 42 wt. % to about 25 wt. % in the first seven meters. At 10 meters, it then rises to around 30% by weight. Leaving aside the possibility that this change could be related to the CaO concentration already in the deposited material, this finding can be attributed to the transport of calcium compounds with leaking water. Similar changes in concentration with deposition depth have been demonstrated for sulphates. However, this unexpected calcium data will be related not only to the dissolution of calcium sulfate but also to the dissolution of other calcium salts. The related Mg compounds will not significantly contribute to this process, since the MgO concentration practically does not change with deposition depth. The same applies to BaO. In this context, long-term “washing” of carbonates from landfill into groundwater can also be expected. This has not been monitored yet, because it is a non-toxic, not monitored substance. It is clear from the model study that by-products from the operation of brown coal-fired fluidized bed boilers and using limestone as a desulfurization medium during storage in a landfill chemisorb a significant amount of carbon dioxide from the ambient air. This reactivity should be taken into account in the carbon dioxide balance of energy sources, which is not yet respected.