System including method and apparatus for treating contaminated underwater sediment by lowering a hollow casing to an underbed, lowering a power driven Kelly bar with injecting and mixing blade fed with treatment material such as solidifying cement and flyash, providing a top cover for confining the...http://www.google.es/patents/US5127765?utm_source=gb-gplus-sharePatente US5127765 - System for in-situ treatment of underwater contaminated material
System for in-situ treatment of underwater contaminated material
