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• Substantial
  A history of numerous UXO finds or heavy residual fragmentation. Areas likely to be assessed as substantial include impact areas, demolition sites and areas of heavy explosive ordnance dumping.
  
  Advice: All land usage may continue without specific UXO search or remediation. Development and/or land usage re-zoning proposals for land parcels considered to be subject to a substantial UXO should only proceed following the conduct of UXO investigation and remediation. Refer to our UXO Warning and Advice and Site Information pages.

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• Slight
  Areas with a confirmed history of military activities that have resulted in residual UXO but Defence considers it inappropriate to assess as substantial.
  
  Advice: All land usage and development, within these areas, should continue without further UXO investigation or remediation. Refer to our UXO Warning and Advice and Site Information pages.

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• Other
  Defence records do not confirm that the site was used for live firing. UXO or explosive ordnance fragments / components have not been recovered from that site. Defence opinion is that it would be inappropriate to assess as either slight or substantial.
  
  Advice: These sites have been included for general information purposes only. Defence makes no recommendations in regards to this category. Refer to our UXO Warning and Advice and Site Information pages.

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Defence recommends that, State or Local authorities should take action, as far as practical, to:

a.              notify affected landowners that their property is in a slight or a substantial potential UXO contamination area, as appropriate;

b.             publicise the authorities’ requirements for UXO investigation and remediation, in respect to land usage and development; and

c.              inform affected landowners, residents and those working in these areas that the area was used for military activities and ensure that they receive the appropriate UXO warning and advice as issued by Defence. See What Should I Do?