Currently considerable attention is being devoted to protection and restoration of the environment. Here problems connected with contamination of atmospheric air, underground, and surface water come to the forefront, in following which a no less significant question is treatment of soil. Today there is an ever increasing level of contamination of town soils by inorganic (mainly heavy metals) and organic (mainly oil product hydrocarbons), ecotoxicants, a high degree of soil compaction, inadequate maintenance, including loosening, flooding, introduction of fertilizers, which in combination leads to degradation of the landscape. Exclusion of contaminating substances of anthropogenic origin from entering the landscape is impossible. Therefore by soil purification we should understand exclusion of contaminating substances from biological circulation. Solution of this problem currently involves either collection and disposal of contaminated soils followed by a covering of imported, ecologically clean, soil, or comprehensive technological measures for cleaning contaminated earth (physical/mechanical, chemical/reagent and biological, i.e., biomediation/phytomediation, methods). However, use of existing biological preparations only makes it possible to purify soils effectively from oil products. A consequence of this is the proposed use and further study of new biological rehabilitation technology for contaminated soils, based on use of a combined preparation, i.e., a mixture of humic-mineral concentrate and biological preparation Oleovorin. On introducing this preparation there is conversion of oil products within soils into carbon dioxide gas and soil organic matter (up to a relatively safe concentration of 1 g/kg) and bonded mobile forms of heavy metals (HM), which prevents their migration into ground water and entry into vegetation. A series of laboratory and field tests was set up with the aim of determining the main parameters of the production regime for purifying contaminated soil of town areas and revealing the dependence of the degree of contaminated soil detoxification on different conditions. The HM concentration in soil was determined by atomic-absorption analysis using a KVANT-2A spectrometer, and the concentration of oil products was determined by a fluorimetric method using a FLYuORAT 02-3M type instrument. In the course of a laboratory experiment soil naturally contaminated from grassy areas adjacent to a large main road of Moscow was studied. Data are presented in Fig. 1 for the reduction in the concentration of mobile forms of HM in the course of a laboratory experiment. The greatest degree of oil product biodegradation was obtained with introduction of the optimum concentration of preparation components with temperature increased to t ≈ 30°C and it was 60.8% of the initial concentration Coilprod = 3.25 g/kg (Fig. 2). Chemical and Petroleum Engineering, Vol. 46, Nos. 11–12, March, 2011 (Russian Original Nos. 11–12, Nov.–Dec., 2010)