Patent ID: 8926221
Filing Date: 2015-01-06
Classification: B09B,B09C,E02F

Abstract:
1. A method of remediating a contamination site by consolidation and containment in a disposal pond, said contamination site having a total initial in-situ volume V T of contaminated sediment comprising water and fine-grained solids, comprising the steps of: a. establishing a disposal pond near the contamination site; b. dredging the contamination site and discharging a first volume portion V c. allowing the first volume portion V d. installing a plurality of parallel, coplanar horizontal drains within the lower solids layer to form a first level of horizontal drains within the first solids layer; e. applying vacuum pressure to all horizontal drains to extract water from the lower solids layer and to consolidate the lower solids layer; f. sequentially repeating steps b-e with a plurality of additional volume portions V wherein at least one solids layer in the disposal pond is consolidated before the total volume V