A properly shored trench.
The job connex.
Any conditions making it unsafe to remove an entrance cover shall be eliminated after the cover is removed.
Before an employee enters a permit confined space, the internal atmosphere shall be tested for oxygen content, potential toxic air contaminants, flammable gases and vapours.
Ventilation equipment shall be readily available for permit and non-permit confined spaces.
Confined space shall be treated as non-permit until deemed permit.
A and B
Railing and/or Signage
OSHA Regulated Board Stretchers
Proper testing activities to ensure compliance.
Inconspicuous Deadly Levels of Hydrogen
Immediately Dangerous to Life and Heath
Identified Dangerous Levels of Hydrogen
Interior Depth by Length and Height
International Deadly Limits of Hydrogen
Needs to be known by all employees.
Ensures that employees practice making permit space rescues at least every 6 weeks by removing dummies, manikins, or actual persons.
Must be developed prior to entering confined space and should consult local emergency response services when developing a rescue plan.
Will comply with OSHA if you use the last jobs rescue plan.
In some cases is optional due to the scope of work being performed.
Traffic Control Devices
Can work on several things and monitor the workers periodically.
May only be distracted by relevant operations that have been determined to be high risk.
Is able to maintain communication with workers.
Is responsible for signing in and out employees who enter and exit the space.
Is trained to summon the emergency response team (if necessary).
Here's an interesting quiz for you.