This Decree, which is composed o six articles, was prepared by the Ministry of Environment in cooperation with the Ministry of Agriculture and the Ministry of Health. The Decree establishes: technical conditions of usage of modified feces on landfill; maximum values of concentration of selected hazardous substances in soil and hazardous substances which can be added to soil; maximum values of concentration of selected hazardous substances and components in feces and microbiological criteria of usage feces on landfill; procedures of taking samples of feces and soil and methods of analysis of feces and soil.