Engineering Control Technologies and Its Application in the Risk Management for Contaminated Sites

Engineering control technologies (ECTs) reduce the risk from the contaminated sites through pollution migration control. It has been widely used in foreign contaminated sites for over 20 years. However, in China, the most applied technology in contaminated sites is remediation technology, which usually expensive. ECTs and other technologies are seldom applied. In order to promote the application of ECTs in contaminated sites of china, the paper reviews the major types and the technical principles of ECTs. According to the application in US superfund sites over 20 years, we explore the trends of ECTs development and application. Based on the case studies of ECTs application, we evaluation the effects of pollution risk control of various technologies and the application frequency. There is large number of contaminates sites in china, the pollutants and site conditions are diversity and complicated. It is impractical to remedy all contaminated sites due to limited availability of funds for remediation. Therefore, it is necessary to carry out ECTs research and to improve technology system of contaminated site risk management of china.