BLOCK 5: PHYSICAL/BIOLOGICAL HAZARDS AND CONTROLS - Unit 7: Confined Space (complete) Flashcards
Identify this statement:
“To ensure that all confined spaces on an installation are adequately identified, analyzed, and classified to protect the health of all workers entering these spaces.”
CONFINED SPACE PROGRAM PURPOSE STATEMENT
What OSHA guidance discusses the definitions and requirements for permit-required confined spaces?
29 CFR 1910.146, Permit-required Confined Spaces
29 CFR 1910.146, Appendix C, Examples of Permit-required Confined Space Programs, discusses the various requirements for a permit-required confined space program.
The source used to conduct a Confined Space Program on an Air Force base. It combines basic elements from several sources of information and refers to other references to find other information. It also dictates information that may not be specific in 29 CFR 1910.146.
AFMAN 91-203 Air Force Consolidated Occupational Safety Instruction
Other Guidance: ANSI Z117.1 gives more detailed information on evaluating respiratory protection, emergency response, and PPE requirements when dealing with confined spaces.
A space that is large enough to enter, has limited/restricted means of entry or exit, and is not designed for continuous employee occupancy. (All of these criteria need to be met)
CONFINED SPACE
Confined space that contains no hazardous atmosphere or potentially serious safety hazard, and entrants will not perform any work that could cause a hazardous atmosphere. The space does not have a potential for engulfment, is not configured in a way that would cause entrapment or asphyxiation, or does not contain any other serious safety hazard.
NON-PERMIT CONFINED SPACE
Confined spaces that may contain hazards that are immediately dangerous to life or health (IDLH) or have a potential for or contain a hazardous atmosphere.
PERMIT-REQUIRED CONFINED SPACES
Atmosphere that has an oxygen level below 19.5 percent and can result in asphyxiation.
OXYGEN-DEFICIENT ATMOSPHERE
Oxygen-deficient atmospheres may occur in confined spaces because of ambient oxygen being
* consumed by chemical reactions like oxidation (rusting and naturally occurring fermentation);
* displaced by inert gases like argon, carbon dioxide and nitrogen; or
* adsorbed by porous surfaces like activated charcoal.
Atmospheres that have an oxygen level above 23.5%.
OXYGEN-ENRICHED ATMOSPHERES
Oxygen alters the burning characteristics of many materials, making them both easier to ignite and faster burning once they are ignited. These atmospheres also permit flammable gases and vapors to ignite over a much wider range of concentrations than is possible in ordinary (normal) air.
The lowest concentration of a gas or vapor that must be present to support combustion in the presence of an ignition source.
LOWER EXPLOSIVE LIMIT (LEL)
The highest concentration of a gas or vapor that will support combustion.
UPPER EXPLOSIVE LIMIT (UEL)
A condition that poses an immediate or delayed threat to life that would cause immediate or delayed adverse health effects, or that would interfere with a worker’s ability to escape unaided from a permit-required space.
IMMEDIATELY DANGEROUS TO LIFE AND HEALTH (IDLH)
A written document— renewed annually—that authorizes entry supervisors to issue entry permits. They must be signed by Occupational Safety, Civil Engineering Fire Emergency Services (FES), and BE Flight. It allows functional managers and commanders to appoint entry supervisors who can issue entry permits.
MASTER ENTRY PLAN (MEP)
As long as it is issued from an approved MEP, the entry permit is a written authorization for entry into a confined space under defined conditions for a stated purpose during a specified time.
The ____________________ authorizes entry into permit-required confined spaces.
ENTRY SUPERVISOR
This individual has overall responsibility for checking the accuracy of the permit and for evaluating conditions in and around the space to determine that all necessary precautions have been taken to protect the entrant(s).
The Entry Supervisor’s duties include:
- Verifying that all tests/measurements required by the permit have been made
- Verifying that all procedures and equipment listed on the permit are in place
- Verifying that rescue services are available
- Determining that conditions are acceptable for entry and that they remain acceptable throughout the duration of the entry
- Ensuring that workers are properly trained and qualified on safe operating and emergency procedures, the hazards of entry, and the use of PPE
- Issuing entry permits consistent with the MEP
Attendants cannot enter a space to provide assistance until after additional help arrives on-scene, and then only if they are “qualified” as emergency responders.
TRUE
They are charged with keeping track of the workers authorized to be in the space and with assuring continuous and effective contact with those in the space.
Emergency rescue team members must receive hands-on practice in removing simulated victims (such as dummies, mannequins, or actual persons) from actual or representative confined spaces that have openings and portals like the types from which rescues are likely to be performed. This practice training is conducted initially for each team member and again every __________ months (at a minimum) thereafter for as long as the individual remains on the rescue team.
12 months minimum
Which of the following is NOT one of the BE responsibilities to the Confined Space Program?
a.) Certify organizational personnel, as required, to test confined spaces.
b.) Maintain confined space records that are provided by the organization.
c.) Document the location of each confined space in DOEHRS.
d.) Evaluate worker exposure to hazardous chemicals.
e.) Assist in the selection of appropriate PPE, to include any respiratory equipment.
b.) Maintain confined space records that are provided by the organization.
This is a responsibility of Occupational Safety. They also assist in providing training to workers who would enter confined spaces.
The purpose of the _________________________ is to assist the functional managers or commanders in developing and administering confined space programs.
CONFINED SPACE PROGRAM TEAM (CSPT)
The team consists of:
* Occupational Safety
* Fire Emergency Services (FES)
* Bioenvironmental Engineering (BE)
Confined space work areas pose inherent hazards to workers because of _______________ access and ________________ natural ventilation.
RESTRICTED ; DIMINISHED
____________________ is among the most common atmospheric hazards associated with confined space entry.
OXYGEN DEFICIENCY
Oxygen-deficient atmospheres may occur in confined spaces because ambient oxygen is consumed by chemical reactions like oxidation; displaced by inert gases like argon, carbon dioxide, and nitrogen; or adsorbed by porous surfaces like activated charcoal.
Oxygen content in normal air is ________%.
20.9%
A gas, vapor, or mist is flammable when it is in excess of _____% of its lower explosive limit (LEL) or is an airborne combustible dust at a concentration ____________________ its LEL.
10% ; EQUAL TO OR GREATER
TRUE OR FALSE:
A gas is flammable in concentrations between its LEL and UEL.
TRUE
Monitoring instruments analyze air samples and alarm at a predetermined concentration, usually 10% of the LEL.
The degree to which an atmospheric concentration of any chemical substance is capable of causing death, incapacitation, or impairment of the ability to self-rescue. It can cause acute illness due to its health effects at doses in excess of its OEEL.
TOXICITY
