Confined Space Training 1

Review of key Confined Space Information 2 D EFINITION OF A C ONFINED S PACE –Large enough to bodily enter –Limited or restricted access or egress –Not designed for continuous human occupancy

Review of key Confined Space Information confined space A Permit-Required Confined Space (PRCS) is any confined space with a serious safety or health hazard. 3

SLAC Inventory of Confined Spaces Chapter 6, Confined Spaces (ESH web site) –”Tools and forms” contains links to the confined space inventory and all of the forms you will see in this class”Tools and forms” contains links to the confined space inventory and all of the forms you will see in this class 4

5 Types of Hazardous Atmospheres O XYGEN DEFICIENT OR ENRICHED O XYGEN DEFICIENT OR ENRICHED Less than 19.5 % oxygen or greater than 23.5% C OMBUSTIBLE C OMBUSTIBLE LEL over 10% T OXIC T OXIC 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 Monitors 6 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 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 7

Attendant’s Responsibilities 8 Know the hazards of entry & signs of exposureKnow the hazards of entry & signs of exposure Aware of possible behavior effectsAware of possible behavior effects Maintain accurate account of entrantsMaintain accurate account of entrants Remain at the entrance to the spaceRemain at the entrance to the space Communicates with entrants & monitor their statusCommunicates with entrants & monitor their status

Attendant’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 9

Entry 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 10

Entry Supervisor’s Responsibilities, continued I F A HAZARDOUS CONDITION DEVELOPS DURING ENTRY : –Evacuate space –Determine cause of hazardous condition –Develop procedure to protect employees during subsequent entries 11 Determine if entrant and/or attendant are trained, qualified, authorized, and are capable of performing the task.

Methods of entry N ON PERMIT SPACE –Pre-entry checklist for NPRCS P ERMIT SPACE –Pre-entry checklist and entry permit –Change to a non permit space – declassify –Entry under Alternate procedures 12 Review the inventory information to help decide which method to use. *

Methods 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 13

Evacuation Required When... Alarm sounds, prohibited condition exists, or entrant exhibits signs of exposure 14 –O 2 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 Permit 15 Permits MUST be posted at the entry of the permit space (red folder) They must be retained for one year.