3i INTERNATIONAL, INC. was founded in 1974 and has a rich history of research and technology development in the environmental field. 3i has developed and patented a number of major mechanical process systems. The combination of these technologies results in the full development of 3i mobile sludge extraction, railroad tank car cleaning, refinery and storage tank cleaning, sludge lagoon remediation as well as marine vessel cleaning. All of these systems are unique in the world of heavy industrial cleaning machinery.