The contaminants found most often are hydrocarbons and their derivatives. Among others, these include products from the following major families:
- PHC C10-C50: diesel, heating oil, etc.
- BTEX: gasoline, solvent, etc.
- PAH: diesel, fuel oil and other high molecular weight hydrocarbons, industrial waste
We also often find inorganic contaminants such as metals. Soil often contains both types of contaminants.