It depends on the site and nature of the potential dangers. If the site is underground, is there a build up of explosive methane gases? Is there carbon dioxide - that is unbreathable? Is there an danger of the collapse of the walls or ceiling - burying anyone entering? Any site should have been 'Risk Assessed' before any one is allowed to enter, or work is allowed to begin.
Implement controls
Implement controls
You should develop controls and make risk decisions.
Develop controls and make risk decisions
It is generally recommended at about 5 years of age. Just what age the dog should be is largely unknown.
Develop controls and make risk decisions
Develop controls and make risk decisions
Develop controls and make risk decisions
Develop controls and make risk decisions
Develop controls and make risk decisions
Develop controls and make risk decisions
Develop controls and make risk decisions