## 4 Discussion  
In case of necessity, for monitoring of soil air in Slovakia and the Czech Republic, we used an in situ atmospheric geochemical measurement apparatus with the help of the analyser, or ex situ by sampling samplers. In practice, the most commonly implemented methods are pollution surveys of old environmental burdens and accidents. Pollutants such as pesticides, fertilizers, bacteria, toxic metals and other potentially harmful (not yet identified) environmental contaminants may worsen the quality of drinking water in many regions of the world. These chemicals are carcinogenic for humans [28]. At present, however, these materials are used in industrial plants, the main advantage of which is that they save mineral resources and as a result only a small amount of CO2 is released into the environment [29]. Within the framework of the survey and the remediation of polluted soils and grounds a range of geological and engineering activities are carried out, from the detection and evaluation of the current conditions of the affected areas, through the proposal and implementation of remediation and remediation measures, to post remediation monitoring and active environmental control [30,31]. Soil air monitoring is mainly used in initial screening considering its operational efficiency and speed, as well as low exploration costs. A wide range of exploratory works can be summarized as follows:  
* research of archival documents and scientific literature, terrain inspection of the site realization of probes and boreholes;
* atmospheric geochemical surveys--detection of contaminants in soil air, samples of soils, rocks, sediment reservoirs, river sediments, construction structures sampling of groundwater, surface water and waste water;
* terrain measurement of hydro chemical water parameters and physical, chemical soil parameters;
* terrain and laboratory analyses of both organic and inorganic substances through long-term measurements by automatic sensors;
* hydrodynamic tests (pumping); mathematical modeling of groundwater flow, transport of substances or geochemical processes;
* evaluation of results, processing of reports and map outputs determination of the degree and type of pollution of the rock environment;
* proposal of optimal remediation measures for the disposal of pollution in the rock environment by means of in situ or ex situ development of a remediation project;
* active remediation of pollution and reclamation of affected areas (used are air sparging, bioremediation, venting, air stripping, etc.) \begin{table}
\begin{tabular}{c c c} \hline \hline
**ChiSquare** & **DF** & **Prob \textgreater{} ChiSq** \\ \hline
45.8965 & 12 & \textless{}0.0001 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Result Kruskal–Wallis tests—analysis of variability PID with the influence of the date. The atmospheric geochemical measurements in this article provide information for the determination of relative concentration of pollutants and for the determination of the extent of pollution. The measurement of volatile contaminants and petroleum substances in the soil air was carried out for this survey by the terrain analyser. The contents of CO\({}_{2}\), CH\({}_{4}\), O\({}_{2}\), PID and TP were measured. From these measurements, statistical data processing of the measured substances was developed using the JMP 15 software [25; 26]. The aforementioned statistical data processing shows a clear dependence between the measured values, according to Table 2:  
1. PID and TP substances-TP and PID are related in such a way that part of the PID analyser monitors volatile VOC substances. The volatile organic components of petroleum substances, the subgroup VOC, are BTEX-aromatic hydrocarbons (benzene, toluene, ethyl benzene, and xylene), a group indicator for benzene, toluene, ethyl benzene and xylene. They are captured by part of the PID part of the analyser, but they are organic carbon compounds, so they are also found in TP according to Table 2.
2.