Among the organic compounds isolated from snow and soil samples, sampled in the adjacent grounds surrounding the oil refinery, n-alkanes and aromatic hydrocarbons, oxygen-containing organic compounds represented by carboxylic acids, aldehydes and ketones, tocopherols, steroids, pentacyclic terpenoids, oil hopanes and triphenyl phosphates are identified. In addition, cyclic biomolecules are identified in the snow. Methyl and isopropyl esters of carboxylic acids are identified in the soil. Maximum concentrations of oil-contaminating components are identified in the snow and soil sampled to the north and to the east of the refinery. This is due to the location of the oil loading terminal and the trains of petrol tank vehicles.