January 2006 (PDF 2.9 MB) - Barrick Gold Corporation

Cowal Gold Project – Cyanide Management Plan
6 CYANIDE MONITORING PROGRAMME
In accordance with Consent Condition 8.2(b), the cyanide monitoring programme includes:
• monitoring of CNWAD levels of the aqueous component of the tailings slurry stream at the
discharge point to the tailings dams (Section 6.2);
• monitoring CNWAD levels in the decant water of the tailings dams (Section 6.2);
• an on site laboratory for quickly establishing CNWAD levels in the liquid at the discharge point to
tailings dams and in the decant ponds for monitoring purposes (Section 6.2);
1
• on-line monitoring of HCN (i.e. a form of CNFREE , as discussed in Appendix G of the EIS) at
locations where employees are operating (Section 6.3); and
• a monitoring regime for the detection of cyanide movement beneath and adjacent to the tailings
storages (Section 6.4).
In addition, CNFREE and CNWAD levels will be monitored in the processing plant to provide information
relevant to process control and/or cyanide destruction, as described in Section 6.5.
6.1 REPORTING OF MONITORING
In accordance with Consent Condition 8.2(b) a summary of the cyanide monitoring results will be
provided to EPA, DMR and the Director General for Planning, on a three monthly basis, unless
otherwise agreed by the Director-General. All monitoring results will be included in the AEMR (refer to
Section 9 for reporting obligations).
6.2 CNWAD LEVELS AT THE DISCHARGE POINT TO THE TAILINGS STORAGES AND IN THE
DECANT WATER OF THE TAILINGS STORAGES
Sections 6.2.1 to 6.2.4 describe the monitoring locations and frequency, sample collection, laboratory
analysis, and data management for monitoring CNWAD levels at the discharge point to the tailings
storages and for monitoring CNWAD levels in the decant water of the tailings storages. Section 6.2.5
outlines the review of this monitoring programme.
6.2.1 Monitoring Locations and Frequency
CNWAD levels of the aqueous component of the tailings slurry stream will be monitored at the dischage
point to the tailings storages twice daily (or as otherwise directed by the Director-General for Planning),
in accordance with Consent Condition 8.2(b)(i). In accordance with Consent Condition 8.2(b)(ii),
CNWAD levels in the decant water of the tailings storages will be monitored twice daily (or as otherwise
directed by the Director-General for Planning).
1 CNFREE: Free cyanide, generally includes the cyanide ion (CN - ) and HCN.
HAL-02-07/1/25/CMP-01-Q.DOC 17 BARRICK