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To determine radon emanation rates from the tailings impoundment, waste rock piles and other areas around the site. Completed 2004.
Waste quantification and site survey
To quantify all existing wastes, covers as well as mark all former mine openings ect. Completed 2005.
Remaining resource calculation
Assessment of the published reserve and resource calculations for the Radium Hill Mine. Completed 2005.
Preliminary hydrogeological investigation
Installation and sampling of water observation wells. Completed 2006 with ongoing monitoring.
Contaminated site survey
Contaminated Site Survey Identification and sampling of radiometric and other contaminant anomalies in line with the National Environment Protection (Assessment of Site Contamination) Measure 1999 (NEPM). Completed 2006.
Detailed radiometric survey
Ongoing monitoring commenced in 2006.
The South Australian government's Mineral Resources Division (then part of PIRSA) engaged ENSR Australia to perform a Contaminated Site Risk Assessment and Remediation Control Scoping Study as part of the Radium Hill Uranium Mine remediation project. The Mineral Resources Division manages the former Radium Hill Uranium Mine and Low Level Radioactive Waste Repository on behalf of the South Australian Government.
ENSR is a leading global environmental consultancy with over 25 years experience in environmental risk assessment.
What is risk assessment
Risk assessment considers potential human health and ecological exposures and relevant radiological and chemical toxicities which might occur in a given environmental situation. An estimate using realistic but worst case assumptions of contact with the contaminants is made.
Upon its closure in 1961, the Radium Hill mine was abandoned, access to mine workings were blocked and infrastructure was removed. Further rehabilitation included additional backfilling of old mine openings and covering of the tailings impoundment. At the same time, the site was also established as a repository for low-level radioactive waste materials.
The aim of the risk assessment and control scoping study is to estimate human and ecological risks associated with radiological and non-radiological contaminants within the terrestrial environment. Understanding the risks will enable potential options to be identified for the future and responsible decisions to be made regarding remedial action for Radium Hill.
Clear and accessible communication of risk information to stakeholders and the public is a key component of this project. ENSR is producing a series of three information sheets as a basis for discussion of the project and its progress with stakeholders.