Confined Space Training

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Review of key Confined Space InformationReview of key Confined Space Information

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DEFINITION OF A CONFINED SPACE– Large enough to

bodily enter

– Limited or restricted access or egress

– Not designed for continuous human occupancy

Review of key Confined Space InformationReview of key Confined Space Information

A Permit-Required

Confined Space (PRCS)

is any confined space

with a serious safety

or health

hazard.

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SLAC Inventory of Confined SpacesSLAC Inventory of Confined Spaces

• Chapter 6, Confined Spaces (ESH web site)– ”Tools and forms” contains links to the co

nfined space inventory and all of the forms you will see in this class

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Types of Hazardous Atmospheres

OXYGEN DEFICIENT OR ENRICHED Less than 19.5 % oxygen or greater than 23.5%

COMBUSTIBLE LEL over 10%

TOXIC Toxic gases, vapors, mists or dusts at or above PEL

It is possible to have any combination of these three hazards. Gases of various weights (relative to air) will stratify in the space.

Atmospheric MonitorsAtmospheric Monitors6

An inaccurate monitor will not protect the workers. The monitor must be within its calibration cycle.

Verify that all equipment is in good working order.

The atmosphere in a space must be tested to assure that no hazards exist.

Entrant’s ResponsibilitiesEntrant’s Responsibilities

1. Know the hazards and signs,

symptoms and consequences of

exposure.

2. Properly use all confined space

equipment.

3. Communicate with the attendant and

alert to symptoms or prohibited

conditions.

4. Exit from the space if ordered,

prohibited conditions exist or

signs/symptoms develop or an

evacuation alarm is sounded.

5. Notify entry supervisor if unable to

perform the entrant duties

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Attendant’s ResponsibilitiesAttendant’s Responsibilities8

• Know the hazards of entry & signs of exposure

• Aware of possible behavior effects

• Maintain accurate account of entrants

• Remain at the entrance to the space

• Communicates

with entrants &

monitor their

status

Attendant’s Responsibilities, continuedAttendant’s Responsibilities, continued

Monitors activities inside and outside the space

Orders evacuation of space if a prohibited condition exists, entrant develops symptoms, an outside condition creates a hazard, or the attendant can not perform all duties

Initiate on-site rescue procedures

Keep unauthorized persons away

Does nothing that might interfere with primary duties

Performs Non- Entry Rescue

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Entry Supervisor’s ResponsibilitiesEntry Supervisor’s Responsibilities

• Know hazards and symptoms of exposure

• Verifies entries have been made on permit, all tests have been performed & procedures/equipment are in place.

• Terminates entry & cancels permit

• Verifies rescue services are available

• Removes unauthorized individuals

• Assures acceptable entry conditions exist and are maintained

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Entry Supervisor’s Responsibilities, continuedEntry Supervisor’s Responsibilities, continued

IF A HAZARDOUS CONDITION DEVELOPS DURING ENTRY:– Evacuate space– Determine cause of hazardous condition– Develop procedure to protect employees

during subsequent entries

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Determine if entrant and/or attendant are trained, qualified, authorized, and are capable of performing the task.

Methods of entryMethods of entry

• NON PERMIT SPACE– Pre-entry checklist for NPRCS

• PERMIT SPACE– Pre-entry checklist and entry permit– Change to a non permit space – declassify– Entry under Alternate procedures

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Review the inventory information to help decide which method to use.*

Methods of EntryMethods of Entry

• Facilitate changing to a non-PRCS• Alternate Entry Procedure

– Only hazard is actual or potential atmospheric hazard

– Handled with Ventilation– Complete form

• Temporary Declassification– No actual or potential atmospheric hazard– Remove all hazards by LOTO or other means

for the duration of the entry

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- COMPLETE FORM

Evacuation Required When . . .Evacuation Required When . . .

Alarm sounds, prohibited condition exists, or entrant exhibits signs of exposure

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– O2 drops to 19.5% or rises

to 23.5%

– Flammables rise to 10% of LEL

– Contaminants reach exposure limits

– Outside conditions pose a hazard

– Attendant or Entry Supervisor must leave post

Entry PermitEntry Permit15

Permits MUST be posted at the entry of the permit space (red folder)

They must be retained for one year.