Threshold values
8.—(1) A list of threshold values must be derived in accordance with Parts A and B of Annex II to the Directive on the basis of methodologies approved by the Department.
(2) The Department shall amend the list of threshold values whenever new information indicates that a threshold value should be set for an additional substance, that an existing threshold value should be amended, or that a threshold value previously removed from the list should be reinserted, in order to protect human health and the environment.
(3) Where in the opinion of the Department a body of groundwater is no longer at risk from a pollutant, group of pollutants or indicator of pollution, the Department may revoke the threshold value for that pollutant, group of pollutants or indicator of pollution.
(4) The Department shall supply to the Government Department in Ireland having responsibility for corresponding functions, copies of proposals under this paragraph relating to threshold values for bodies of groundwater associated with the Neagh Bann, North Western and Shannon International River Basin Districts.
(5) The Department shall apply the threshold values for the purposes of assessing groundwater chemical status and determining the starting point for trend reversal.