Licence conditions for pollution studies and reduction program


  

Licence conditions for pollution studies and reduction programs

Summary
 
Licence number: 2863
Title: Pollution Reduction Study (PRS) 5 - Investigate aluminium limit
Start date: 24 Oct 2017
 
Licence Condition
Background The EPA is aware that there is the potential for levels of soluble aluminium in the receiving waters of the Dungog Water Treatment Plant (WTP) to be elevated above the default trigger level in ANZECC (2000) of 0.15mg/L.  If ANZECC default trigger levels are exceeded, these values trigger further investigations to determine whether a real risk to the ecosystem exists or whether it is necessary to adjust the trigger values into site-specific guidelines. Deliverables The licensee must undertake investigations using water quality data from the Williams River, as a minimum, to identify a soluble aluminium site-specific guideline for the Dungog WTP discharge in accordance with the decision frameworks provided in ANZECC (2000).  The report must be submitted to the Director - Hunter, at hunter.region@epa.nsw.gov.au, by no later than 26 January 2018.   Note: It is the EPA’s intention to include the identified soluble aluminium guideline, should it be acceptable to the EPA, as a concentration limit in the licence.