Confined Spaces General Industry Standard 1910.146 General Industry Standard 1910.146 Construction...
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Transcript of Confined Spaces General Industry Standard 1910.146 General Industry Standard 1910.146 Construction...
![Page 1: Confined Spaces General Industry Standard 1910.146 General Industry Standard 1910.146 Construction Industry 1926.21(b)(6)1926.3 53(b) 352(g) Construction.](https://reader033.fdocuments.us/reader033/viewer/2022051415/56649cff5503460f949d16b4/html5/thumbnails/1.jpg)
Confined Spaces • General Industry
Standard1910.146
• Construction Industry 1926.21(b)(6)1926.353(b) 352(g)
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Confined Space A 33-year-old man
died while cleaning out an ink tank in Providence printing company. He entered the tank through a small opening wearing a supplied air respirator.
Vapors began to collect in the tank. His respirator failed, and no one was prepared to rescue him.
Bronx Employer Jailed on State Charges after Worker Nearly Dies in an Underground Tank
Two weeks ago the owner and the manager of a Bronx junkyard were convicted of charges that they nearly killed an employee by sending him into an underground tank containing waste oil and gasoline without any protective equipment. The lack of oxygen in the tank caused the employee to lose consciousness. He was rescued by a city firefighter.
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Confined Space Facilities must survey for
confined spaces.
OSHA • Large enough to enter and perform
work• Not designed for continuous
occupancy• Restricted entry exitall three must be present to define a
confined space
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Large enough to enter and perform work
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Not designed for continuous occupancy
• Boiler, degreaser, furnace
• Pipeline, pit, pumping station
• Reaction or process vessel, mills • Septic tank, sewage Digester
• Silo, storage tank, barges
• Sewer, utility vault, manhole
• Trenches, shafts, caissons
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Not Designed for Continuous Worker Occupancy
• Not designed to work in on a regular basis
• Designed to store a product
• Enclose materials or processes
• Transport products or substances
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Restricted entry/ exit• Openings as small as 18 inches in
diameter
• Difficult to enter with SCBA or other life-saving equipment
• Difficult to remove downed worker in folded up or bent over position
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Searching for Permit Required Spaces
Space large enough to enter &;Limited or Restricted entry or exit &; Not designed for continuous worker occupancy.
NONot a confined Space
YES Confined Space
Hazardous Atmosphere
Engulfment Hazard
Configuration Hazard
Any other recognized serious hazard
Permit-
Required
Confined
Space
Non
Permit
Required
Space
YES NO
Or
Or
Or
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PRCS: Hazardous atmosphere
• Risk of death, incapacitation, impair self –rescue,
• Cause injury or acute illness
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Hazardous atmosphere
• Oxygen enriched atmosphere[<23.5%]
Causes flammable and combustible materials to burn violently when ignited
• Flammable atmospheres [gas,vapor,mist] >10.5% of LEL
• Oxygen deficient atmosphere [>19.5%]
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Hazardous atmosphere
Combustible dusts that meets or exceeds LEL
Approximately dust obscures vision at a distance of 5feet [1.53 meters] or less
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PRCS: Engulfment Hazards
• Surrounding and capture of employee by material liquid or fine solids in the space
• Loose, granular materials stored in hoppers
• Crusting and bridging below
• Flooding of confined space
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PRCS:Configuration Hazard
Shape of the space or equipment in the space that poses an immediate or delayed threat to life or irreversible health effects; or that would interfere with a worker’s ability to escape the space, unaided.
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PRCS: Any other recognized serious hazard
Physical hazards: radiation, noise, electric
Moving parts (grinding equipment, agitators, steam, mulching equipment)
Corrosive chemical hazards
Biological hazards
Present an immediate danger to life or health or impair an employee’s ability to escape.
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Dangerous Combinations
• Working in and around the space
• Rescue operations during emergencies
• Worsened conditions due to work activities:• Welding and cutting, use of bonding agents• Cleaning with solvents, use of other
chemicals• Use of gas-powered equipment
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OSHA Permit (PRCS) system
Designed to prohibit entry
Entry permitted for only those trained and qualified
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Special Permit Required Spaces
The employer must develop a written permit entry program for permit required spaces (PRS).
Such a program must address procedures for evaluating spaces, precautions during entry, protection during work, and backup in case of emergencies.
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Testing The AtmosphereTest all areas of a confined space
• Top - methane is lighter than air
• Middle - carbon monoxide is the same as air
• Bottom - hydrogen sulfide is heavier than air
• Remain vigilant for Oxygen Deficiency
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Ventilation• Best option to remove contaminants and
restore natural atmosphere
• Air intake in a safe location to draw fresh air only
• Continuous ventilation whenever possible
• Retest the confined space before entry
• Consider continuous monitoring during work
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Isolation• Locking and tagging out electrical sources.
• Blank and bleed ALL lines, pipes, etc.
• Disconnecting mechanical drives and shafts.
• Locking and tagging out shutoff valves.
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Standby / Rescue
• Constant communication with the workers inside
• Line of Sight
• Radio Contact
• Know emergency rescue procedures.
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Rescue
Rescue:NFPA 1670
awareness
ops
tech
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Standby / Rescue
• 35% of workers who die in confined spaces are would-be rescuers
• Trained in use of emergency rescue equipment and PPE
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Permit Entry Systems
• Designed to prohibit entry for those not trained and qualified
• Written permit signed by entry supervisor
• Verifies pre-entry precautions have been taken and the space is safe to enter
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Permit Entry Systems
• Posted at entry to confined space
• Specifies apparent hazards and corrective actions taken prior to entry
• Requires termination of permit when task is completed or when new conditions exist
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Entry Permit Requirements
• Date, location, and name of confined space
• Purpose of entry and known hazards
• Duration of entry permit time
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Entry Permit Requirements
• Authorized entrants, attendants, supervisors
• Air testing results - signature of tester
• Protective measures to be taken Ventilation, isolation, flushing Lockout / Tag-out, purging
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Entry Permit Requirements• Communication procedures
• Special equipment and procedures• Personal protective equipment• Alarm procedures• Rescue equipment• Respirators
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Entry Permit Requirements
• Id All authorized entrants in confined space
• Id All attendants and rescue team members
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Training and Education
• Prior to initial work assignment
• Retraining: Job duties change Change in permit-space program New hazards are present Job performance indicates deficiencies
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RICOSHJames CelenzaRI Committee on Occupational Safety and
Heath741 Westminster stProv RI 02903
(401)751-2015(401)751-7520
This material was produced under grant number SH-26285-14-60-F-37 from the Occupational Safety and Health Administration, U.S. Department of Labor. It does not necessarily reflect the views or policies of the U.S. Department of Labor, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. Government.