Unsafe acts: An unsafe act is a human error or personal mistake by which there is a chance of accident, injury, property loss, or harm to the environment and the unsafe act can increase the probability of an accident. Examples: 1. Failure to wear PPE. 2. Using hands instead of tolls and tackles. 3. Lack of knowledge, etc. Unsafe condition: An unsafe condition means the existence of a mechanical, physical, chemical, or environmental condition or situation which may cause a hazard or accident. The unsafe condition must be rectified and repaired. Examples: 1. Unguarded machine. 2. Poor housekeeping. 3. Presence of flammable gasses. 4. Presence of toxic gasses, etc.