Statutory guidance

Exfoliation of vermiculite and expansion of perlite: process guidance note 3/07

Regulators must use this PGN to assess applications and write permits for vermiculite exfoliation and expansion of perlite.



Local authority regulators can be:

  • district councils, borough councils, unitary councils or port health authorities in England and Wales
  • the Scottish Environment Protection Agency in Scotland
  • district councils or the Northern Ireland Environment Agency in Northern Ireland

This process guidance note (PGN) includes:

  • air emission limits
  • emission monitoring methods
  • best available techniques to control air emissions
  • application form template
  • model permit for vermiculite exfoliation and expansion of perlite

Vermiculite exfoliation and expansion of perlite is a ‘Part B’ activity under the local authority pollution prevention and control (LAPPC) regime.

Published 6 September 2012