文档介绍：受限空间安全
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Confined Space Statistics
Leading cause of occupational fatalities in this country
The Standac hazards, have the potential to contain any hazard capable of causing death or serious physical harm:
Utility closets
Below-grade trenches
Storage vaults
Utility subbasements
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Confined Spaces on Campus
EH&S and PPM jointly determine which types of spaces or specific spaces are defined as confined spaces
All confined spaces on campus will be considered “Permit Required” until pre-entry procedures determine otherwise.
Only the Entry Supervisor is authorized to downgrade entry requirements.
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Confined Space Entry Procedures
Space Evaluation
Alternate Entry Procedures
Permit-Required Entry Procedures
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Space Evaluation
Refer to Flow Chart
Entry Supervisor must evaluate & authorize an entry
This will determine if “Alternate Entry” or “Permit-Required”
If the space is reclassified as an “Alternate Entry” then the following conditions must exist:
only hazard is the potential for a hazardous atmosphere; and
potential hazard can be eliminated through continued forced
air ventilation; and
previous & current gas tests must show above two conditions are true
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Alternate Entry Procedures
Procedure that may be used to enter a confined space if the only hazard present in the space is atmospheric in nature and:
The atmospheric hazard can be controlled by mechanical ventilation alone and;
The permit space will not become immediately dangerous to life and health (IDLH) if the mechanical ventilation should fail.
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Alternate Entry Procedures (cont)
Entry Supervisor ensures space has been properly classified
Use guarding/cover/barrier to prevent
falls (when removing cover)
Lock out/tag out all hazardous
energy sources
Complete log
Test for O2, flammable gases/vapors and potential toxic air contaminants
Set up ventilation (supply air taken from clean source)
The E