Development of Regional Maximum Permissible Concentrations of Oil in the Soils of Arid Ecosystems in the South of Russia

Objective difficulties and incorrect use of a single maximum permissible concentration of oil for all soils of Russia are considered. It is more expedient to use regional maximum permissible concentrations (RMPC) of oil in different soils of Russia, taking into account their regional ecological-genetic and ecological-geographical features. RMPC of oil in arid soils of the South of Russia was developed on the basis of violation of their ecosystem functions. Regional MPC of oil in dark chestnut soils (haplic kastanozems) is 0.40 % of oil in soil, chestnut (haplic kastanozems) and light chestnut (haplic kastanozems) – 0.30 %, brown semi-desert (haplic calcisols) – 0.24 %, sandy brown semi-desert (calcaric arenosols) – 0.20 %. The developed RPMCs can be used not only for arid soils in southern Russia, but also for similar arid soils in other regions.