Lubna landfill

FIG. 30 Collection of groundwater samples with the use of MP1 pumping equipmentChemical and physical analyses of the groundwater have been preformed since 1994 (the ownerof the landfill is obliged to reclaim it). The results provide information on the improvement of waterquality in the vicinity of the landfill. The introduction of a vertical barrier has positively changed thebasic parameters measured in the first groundwater layer (Tab. 4), especially in the surface water(Tab. 5). At the moment, chloride and sulphate concentrations as well as the dissolved mattercontent meet the requirement of legal standards. An example of nitrate nitrogen concentration inthe 1 st groundwater level in the surroundings of the Lubna landfill is shown in Fig. 31. Therequirements for the nitrogen concentration, however, have not been met yet, although it is stilldecreasing.Groundwater in the second (drinking) water layer was not threatened by pollutants originatingfrom the landfill, therefore the measurement results had not been changed since many years(Tab. 6). The reason was that the water is perfectly isolated by thick layers consisting of poorlypermeable clays (Fig. 6).FIG. 31 Concentration of nitrate nitrogen in the 1 st groundwater level in the surroundings of the Lubna landfill(tested in June 2002)23