engleski

An Overview of Limiting Values of Polluted Tecnosols Based on the Example of the Gas Station Remediation

Technosols were mainly formed by the human activity in the city areas due to building, factory, road construction, as well as other objects ; transffering and mixing the horizons of the natural soil. That type of soil is also determined in the gas station area. According to the accepted legal regulation (Environmental Protection Act: NN 80/13, 153/13, 78/15 and Mining Act: NN 56/13 i 14/14), after the finished remediation of the abandoned workspace, it is required to determine the current condition of the soil quality in the remediated area, in this case the gas station. Working methods included in this research had the usual steps: field work (vertical and horizontal soil sample collecting in the ruinous condition in the gas station and nearby area), laboratory analysis and data processing collected in the previous stages. Collected soil samples were delivered and analysed in the authorised and accredited laboratory for these kind of actions. Standard soil chemical analyses were conducted (soil reaction and organic matter content) and analyses of the content of organic and inorganic soil pollution. During the writing of this elaborate we came across the following problem. There are no limiting values for the condition evaluation of the tehnosols quality in the Republic of Croatia, since there is only an Ordinance on the protection of agricultural land against pollution caused by harmful substances (NN 9/14). Unlike the Republic of Croatia, the surrounding countries made a step forward in the determination of limiting values which reffer to the different ways of land use. Based on the previously mentioned Ordinances on different land use in surrounding countries in 2008, criteria preposition on different ways of land use in the Republic of Croatia was created. Unfortunately, 10 years later, those Ordinances are still not active. Moreover, currently valid Ordinance on the agricultural land protection has certain drawbacks compared to the older Ordinance from 1992. Arsenic, cobalt and molybdenum are not included in the mentioned Ordinance from 2014, and there are no regulated values for these metals. The following problems reffer to the different limiting values in the previously mentioned Ordinances for some heavy metals. According to the Ordinace from 1992, the highest acceptable content for Zn was 300 mg/kg, 60 mg/kg for Ni and 100 mg/kg for Cr. According to the valid Ordinance from 2014, content for Zn is 60 mg/kg, 30 mg/kg for Ni and 40 mg/kg for Cr. All these facts indicate the necessity for the urgent compatibility and the legislation upgrade which reffers to the limiting values related to the remediation of the polluted technosols.

soil remediation ; ways of land use ; limiting values

nije evidentirano