RST Environmental Solutions Ltd

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Purpose and Description
Siltsock are a three-dimensional tubular sediment control and storm water runoff filtration device. Siltsock trap sediment and soluble pollutants by filtering runoff waster as it passes through the matrix of the Siltsock and by allowing water to temporarily pond behind the Siltsock. They are also used to reduce runoff flow velocities on sloped surfaces.

Siltsock are to be installed down slope of any disturbed area requiring erosion and sediment control and filtration of soluble pollutants from runoff. Siltsock are effective when installed perpendicular to sheet or low concentrated flow, and in areas that silt fence is normally considered appropriate. Acceptable applications include:

  • Site perimeters
  • Above and below disturbed areas subject to sheet runoff, interrill and rill erosion
  • Above and below exposed and erodible slopes
  • Along the toe of stream and channel banks
  • Around area drains or inlets located in a ‘sump'
  • On compacted soils where trenching of silt fence is difficult or impossible
  • Around sensitive trees where trenching of silt fence is not beneficial for tree survival or may unnecessarily disturb established vegetation
  • On frozen ground where trenching of silt fence is impossible
  • On paved surfaces where trenching of silt fence is impossible