Confined Spaces 16 Flashcards by tony garza

OSHA Standard for Permit-Required Confined Spaces

1910.146

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OSHA Telecommunications Standard- Underground Lines

1910.268 Section (O)

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OSHA Standard to allow technicians to enter a jointly occupied manhole while working alone

1910.268 Section O(3)

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Attendant must be currently certified in

CPR and First Aid

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OSHA acceptable oxygen levels are from

19.5% to 23.5%

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(LEL/LFL)

Lower Explosive Limit, Lower flammable limit

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Hydrogen Sulfide must be lower than _____ PPM and Carbon Monoxide must be lower than ____PPM.

10 and 33

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Ladders shall be used to enter and exit manholes exceeding 4 feet in depth.

OSHA 1910.268 (O)(4)

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All rescue personnel must practice making permit space rescues at least once every

12 months

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Carbon monoxide may be fatal at ____ parts-per-million (ppm) in air, and is considered dangerous at ____ ppm

1000 and 200

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There are three technician roles associated with confined space operations:

Entrant, Attendant, and Supervisor

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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

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A condition resulting in death or unconsciousness caused by inadequate oxygen, presence of noxious agents, or other obstruction to normal breathing

Asphyxiation

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The Comcast maximum oxygen level is ______%.

22.5%

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How long are entry permits required to be kept on file?

at least one year

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The standby attendant will continue to monitor atmosphere levels and record every ______ minutes.

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Prevent any objects or personnel from falling into a manhole.

Manhole Shield

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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

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OSHA standard for ladders to be used to enter and exit manholes exceeding 4 feet in depth.

(OSHA 1910.268 (o)(4)

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A mechanical rescue device must be available to rescue personnel in vertical type spaces more than___

5ft deep

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All rescue personnel must practice making permit space rescues at least

Once every 12 months

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Name the four Hazardous Atmospheres

Flammable, Asphyxiating, Toxic, and Irritant and or corrosive

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Normal Atmosphere Levels by Percentage

Oxygen 20.9%, Nitrogen 78.1%, Argon 1% and small amounts of other gases

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Oxygen deficient atmoshphere

less than 19.5%

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Oxygen enriched atmosphere

more than 23.5%

Atmosphere testing 1 - 3

1. Oxygen, 2.Combustible Flammable Vapors 3.Toxic gasses and vapors

Permit Requiring Confined Spaces 1-4

1. Potential or contains a hazardous atmosphere 2. Has a material that has potential for engulfing 3. 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. 4. 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

35%

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

Spaces larger than 1000 cu ft will need to ventilate longer than ___

15 minutes

MSDS

Material Safety Data sheets

64%

172

66%

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

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

1222