confined space overview. confined spaces is large enough and shaped in a way that allows an employee...
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CONFINED SPACE
OVERVIEW
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CONFINED SPACES
• Is large enough and shaped in a way that allows an employee to enter and perform assigned work. It’s also a space that has limited or restricted means for getting in or out and is not designed for continuous occupancy.
• Examples: Tanks, storage bins, vessels, silos, hoppers, vaults and pits.
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PERMIT REQUIRED CONFINED SPACE
• Has or has the potential for one or more of the hazards:
• Hazardous atmosphere– Levels of flammable gas, vapor and mist– Airborne combustible dust– Oxygen- below 19.5% or above 23.5%
• Engulfment potential
• Entrapping design
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PROTECTION AGAINST HAZARDS
• Post signs or other warnings
• Use barriers
• Use a written space entry program
• Conduct air monitoring to I.D. hazards
• State conditions that will make the space acceptable to enter and verify that those conditions will be maintained
• Flush and ventilate to eliminate or control the spaces atmospheric hazards
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THE PERMIT IDENTIFIES:• The space to be entered• Names of workers authorized to enter the space,
attendant and entry supervisor• Hazards of the permit space
– results of initial and periodic tests
– measures used to isolate the space
• Acceptable entry conditions• Equipment to be used in the space
– PPE, lighting, ventilating, rescue, etc..
• Rescue and emergency services / phone numbers • Additional permits, i.e. hot work
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KEY EMPLOYEES• Authorized entrants - are assigned and
trained to work in a permit space
• Attendants - are stationed outside the space to maintain contact with and monitor authorized entrants
• Entry supervisors - determine if conditions are acceptable for permit space entry, authorize the entry, oversee and stop work
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SAFETY TRAINING
• Authorized entrants, attendants, and supervisors must “ acquire the understanding, knowledge, and skill necessary for the safe performance of the duties assigned”
• Must be trained when assigned to confined space duties, when new hazards appear, or there’s reason to believe that they aren’t following procedures
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AUTHORIZED ENTRANTS
• Can enter a permit space only after it’s tested and found safe for entry.
• Must know:– potential hazards– signs and symptoms - space no longer safe– PPE required– equipment to use and how to use it
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ATTENDANTS• Responsible for:
– maintaining an accurate count of who’s in the space, monitoring activities inside and outside the space, staying in touch with authorized entrants
– keeping unauthorized persons out– ordering evacuation if attendant duties can’t be
performed safely– summoning authorized rescue and emergency
services
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ENTRY SUPERVISOR
• Must make sure permit requirements are completed before signing the permit and allowing entry
• Familiar with the space’s hazards
• Terminating the entry and canceling the permit when the task is completed or conditions arise that are not safe
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PERMIT - REQUIRED CONFINED SPACE:
• Hazardous Atmosphere
• Engulfment Potential
• Entrapping Design
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PERMIT SPACE TASKS ARE PERFORMED BY:
• Authorized Entrants
• Attendants
• Entry Supervisors
• Confined spaces are hazardous, leave the space immediately if you have any hint of problems. If you feel tired, dizzy, nauseous, have trouble breathing or any possible symptom of danger-get out!