Confined Spaces 16 Flashcards
OSHA Standard for Permit-Required Confined Spaces
1910.146
OSHA Telecommunications Standard- Underground Lines
1910.268 Section (O)
OSHA Standard to allow technicians to enter a jointly occupied manhole while working alone
1910.268 Section O(3)
Attendant must be currently certified in
CPR and First Aid
OSHA acceptable oxygen levels are from
19.5% to 23.5%
(LEL/LFL)
Lower Explosive Limit, Lower flammable limit
Hydrogen Sulfide must be lower than _____ PPM and Carbon Monoxide must be lower than ____PPM.
10 and 33
Ladders shall be used to enter and exit manholes exceeding 4 feet in depth.
OSHA 1910.268 (O)(4)
All rescue personnel must practice making permit space rescues at least once every
12 months
Carbon monoxide may be fatal at ____ parts-per-million (ppm) in air, and is considered dangerous at ____ ppm
1000 and 200
There are three technician roles associated with confined space operations:
Entrant, Attendant, and Supervisor
The surrounding and effective capture of a person by a liquid or substance, possibly causing death by filling or plugging of the respiratory system or creating enough force on the body to cause death by strangulation, constriction or crushing
Engulfing
A condition resulting in death or unconsciousness caused by inadequate oxygen, presence of noxious agents, or other obstruction to normal breathing
Asphyxiation
The Comcast maximum oxygen level is ______%.
22.5%
How long are entry permits required to be kept on file?
at least one year
The standby attendant will continue to monitor atmosphere levels and record every ______ minutes.
20
Prevent any objects or personnel from falling into a manhole.
Manhole Shield
Effects similar to frost bite due to prolonged exposure to water and cold on the skin combined with a lack of blood flow due to the cold
Trench Foot
OSHA standard for ladders to be used to enter and exit manholes exceeding 4 feet in depth.
(OSHA 1910.268 (o)(4)
A mechanical rescue device must be available to rescue personnel in vertical type spaces more than___
5ft deep
All rescue personnel must practice making permit space rescues at least
Once every 12 months
Name the four Hazardous Atmospheres
Flammable, Asphyxiating, Toxic, and Irritant and or corrosive
Normal Atmosphere Levels by Percentage
Oxygen 20.9%, Nitrogen 78.1%, Argon 1% and small amounts of other gases
Oxygen deficient atmoshphere
less than 19.5%
Oxygen enriched atmosphere
more than 23.5%
Atmosphere testing 1 - 3
- Oxygen, 2.Combustible Flammable Vapors 3.Toxic gasses and vapors
Permit Requiring Confined Spaces 1-4
- Potential or contains a hazardous atmosphere
- Has a material that has potential for engulfing
- Has a configuration that a worker can be trapped or suffer asphyxiation by inwardly converging walls or floors with a downward slope and tapers to a smaller cross section.
- Has a recognized serious safety or health hazard
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings:What % of would be rescuers are killed
67%
Recertification for confined spaces
Every 3 years
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings:Fatalities were supervisor positions or above:
35%
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings:No air testing or monitoring done prior to or during entry:
100%
Permit-Required Confined Spaces for General Industry became effective on
April 15, 1993
non-permit confined spaces include
Basements
Attics
Crawl spaces
Residential cellars
OSHA 1910.268 Telecommunications Standard in Section (o) gives specific direction in the following areas:
Guarding manholes and street openings
Requirements prior to entering manholes and unvented
Vaults
Joint power and telecommunications manholes
Suitable levels are less than ____of that Lower Explosive Limit (LEL) and Lower Flammable Limit (LFL).
10%
SAR
supplied air respirator
Muscular pain and spasms due to heavy exertion.
Heat Cramps
Blood flow to the skin increases, causing flow to decrease to vital organs. Results in mild shock and can cause a stroke if not treated
Heat Exhaustion
A life threatening condition in which the body’s temperature control system that produces sweat to cool the body, stops working. Body temperature can rise so high that it causes brain damage or death.
Heat Stroke
A life threatening condition that results in failure of the body’s internal warming system.
Hypothermia
When working in a confined space, always remember to
Blow the Hole!
Monitor Continuously
All confined space atmospheres shall be pre-tested at a minimum of three (3) levels
(top, middle, and bottom) prior to entry
ventilate the space for a minimum of __minutes before allowing the entrant to enter
15
Spaces larger than 1000 cu ft will need to ventilate longer than ___
15 minutes
MSDS
Material Safety Data sheets
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings: No need for entry:
64%
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings: Fatalities:
172
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings: Water or waste water workers
66%
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings: No or poor ventilation
78%
All documentation related to reclassification of a confined space must be maintained on file for ___ from the date of reclassification
18 months
this is where a material that has the potential for engulfing the worker
Permit Required Confined Space
The 3 roles associated with confined space operations, who must be currently certified in CPR and First Aid
Entrant, Attendant, Supervisor
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings: what % of workers received training?
5%
How is a document of confined space reclassification done?
A written certification which includes the basis for determining that all hazards in a permit space have been eliminated, the date and location of the space, and the signature of the person making the determination.
Permit-Required Confined Spaces for General Industry became effective on
April 15, 1993
Exit a permit space as quickly as possible whenever:
An order to evacuate is given by the attendant or the entry supervisor
You recognize any warning sign or symptom of exposure to a dangerous situation
You detect a prohibited condition
An evacuation alarm is activated
The supervisor ensures the permit is signed and generally oversees the entire operation. The supervisor does not need to be
on site.
Any permit space whose opening is above the authorized entrant is considered a
vertical-type permit space.
When your body temperature exceeds ____you are less efficient and prone to heat exhaustion, heat cramps, or heat stroke
102 degrees
________is a common hazardous gas that may build up in a confined space, and it is odorless and colorless
Carbon monoxide (CO)
Examples of primary irritants are
chlorine, various acids, nitrogen dioxide, ammonia, and sulfur dioxide
A second reason for an oxygen shortage is
displacement by another gas
Between 6 and 10% oxygen, the effects are
nausea, vomiting, inability to perform, and unconsciousness.
At less than 6% oxygen, the effects are
irregular breathing, convulsive movements, and death within minutes.
1910.146 section (G)
OSHA mandates for Training in confined spaces
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of confined space accidents from the year 1983 through 2000. The following is a summary of their findings:Separate accidents:
1222
