Trigger Level Reviews

Albion Environmental Ltd were requested by Shanks Argyll and Bute Ltd (Shanks) to review the groundwater trigger levels and develop control levels for their sites located at Lochgilphead; Lingerton Landfill Site and Dunoon; Dalinlongart Landfill Site. The trigger levels had been defined in the PPC Permits.

Albion  reviewed all available groundwater monitoring data at both sites for the period 2005 to 2009 in consultation with the SEPA technical guidance note ‘Hydrogeological Risk Assessment for Landfills and the Derivation of Control and Trigger Levels, Version 2.12 dated April 2005’.

Recommendations to raise trigger levels and establish control levels were made in the report as well as removing some monitoring points from the PPC Permit regime.

In addition to the groundwater review, Albion carried out a landfill gas trigger review on all groundwater boreholes. Again the reports made recommendations to raise some trigger levels above the levels defined in the PPC Permits of >1% methane, >1.5% carbon dioxide and <18% oxygen.