January 2006 (PDF 2.9 MB) - Barrick Gold Corporation

Cowal Gold Project – Cyanide Management Plan
The following are contingency measures that may be implemented to reduce cyanide levels in the
tailings dams in the event it is established that fauna deaths are occurring from cyanide in the tailings
dam water:
• increase the amount or dosage rate of cyanide destruction chemicals being used in the cyanide
destruction circuit to achieve lower cyanide levels within the tailings dams;
• reduce the amount or rate of cyanide addition;
• reduce the rate of ore feed;
• change the blend of the ore;
• modify the cyanide destruction circuit being used (e.g. change to the back-up cyanide destruction
unit);
• add cyanide destruction chemicals directly to the tailings dams to lower existing cyanide levels; or
• add dilution water, if available.
In the event that one or more contingency measures are implemented, regular monitoring of the
effectiveness of the contingency measures will be undertaken.
7.4 REVIEW OF CYANIDE LEVELS FOLLOWING FAUNA DEATHS
As set out in condition 5.3(c) of the Development Consent, in the event of wildlife deaths occurring due
to cyanide, the EPA shall conduct a review of cyanide levels in consultation with Barrick, DMR and
NPWS. Any decision to require cyanide reduction will include, but not be limited to, the consideration
of:
(a) the number of fauna deaths;
(b) the species of fauna involved in deaths;
(c) the antecedent condition of the species;
(d) methods employed at the time to prevent use of tailings by fauna; and
(e) antecedent climatic and surface water conditions of the lake and surrounding areas.
Barrick will notify the CEMCC of any reductions in cyanide levels as soon as practicable.
HAL-02-07/1/25/CMP-01-Q.DOC 25 BARRICK