ABSTRACT: The point of this task is a theory and technology of the removing volatile parts of contamination in groundwater without a necessity of water drawing outside of the remediated object. The main contribution of this suggested project is to utilize a possibility of existing remediated objects (holes with average 200 mm) without a necessity of a financial costs, a partial elimination of detects by an air - stripping in situ and substantial intensity of the remediation. As a matter of fact there are padded by remediation of the contaminated area in SLOVNAFT-BENZINOL, a.s. - branch Rača.