NOVELTY - Treating soil containing low-level radioactive material and petroleum hydrocarbons involves introducing into supply of contaminated soil at least one bacterial isolate having ATCC accession numbers selected from e.g. Pseudomonas Fredriksbergensis (PTA-5571), Alcaligenes Piechaudii (PTA-5580), which metabolizes constituent of the petroleum hydrocarbon; and treating the supply of contaminated soil until treated concentration of petroleum pollutant is less than 100 parts per million total petroleum hydrocarbons.    USE - For treating a soil containing low-level radioactive material and petroleum hydrocarbons (claimed), e.g. polyaromatic hydrocarbons.    ADVANTAGE - The isolated and purified bacteria strains exhibit the ability to produce a biosurfactant. The combination of the biosurfactant-producing ability along with the ability to degrade polyaromatic hydrocarbons (PAHs) enhances the efficiency with which PAHs can be degraded. The biosurfactant also provides an additional ability to bind heavy metal ions for removal from a soil or aquatic environment. The use of the bacteria strains, is beneficial as the volume of amendments to the soil is kept at a minimum, thus reducing the eventual disposal costs. The trapped oils and petroleum compounds have greater bioavailability to bacteria for biodegradation. Also micelles containing trapped oils and petroleum compounds can be periodically removed or flushed from the system, thus providing an ability to further isolate and separate petroleum compounds from the soil substrate.    DETAILED DESCRIPTION - Treating soil containing low-level radioactive material and petroleum hydrocarbons involves introducing into supply of contaminated soil at least one bacterial isolate having ATCC accession numbers selected from Flexibacter CF Sancti (PTA-5570), Pseudomonas Fredriksbergensis (PTA-5571), Staphylococcus Warneri (LMG 19417) (PTA-5572), Sphingomonas (PTA-5573), Sphingomonas (S37) (PTA-5574), Phylobacterium (PTA-5575), Serratia Ficaria (PTA-5576), Agrobacterium Tumefaciens (PTA-5577), Rhizobium (SDW045) (PTA-5578), Ralstonia Pickettii (PTA-5579), Alcaligenes Piechaudii (PTA-5580) and/or Pseudomonas Putida (PTA-5581), which metabolizes constituent of the petroleum hydrocarbon; and treating the supply of contaminated soil until treated concentration of petroleum pollutant is less than 100 parts per million total petroleum hydrocarbons.