PROTECTIVE CLOTHING
S-1
UNCLASSIFIED
Terminal Learning Objective
• Action: Select Appropriate Chemical
Protective Clothing
• Conditions: Given a classroom
presentation and appropriate
chemical protective clothing
• Standard: IAW 29 CFR 1910.120
Appendix B Personal Protective
Equipment (PPE)
S-2
Enabling Learning Objective
• Identify the requirements for selecting chemical
protective clothing
• Identify the two styles of chemical protective clothing
• Identify the two types of suit material
• Describe the different levels of Personal Protective
Equipment (PPE)
– Safety Requirements – Heat / Hydration
– Risk Assessment Level – Medium
– Environmental Assessment - None
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Selecting Chemical Protective
Clothing
>Known vs. Unknown
>Work function
>Work location
> Weather conditions
> Chemical hazard recognition
> Concentration/exposure guidelines
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Performance Requirements
• Chemical
Resistance
• Durability
• Flexibility
• Temperature
Resistance
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•
•
•
•
•
•
Service life
Cleanability
Design
Size
Color
Cost
Style of Protective Clothing
>Encapsulating
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>Non-encapsulating
Protective Material
• Elastomer - Polymeric materials that
return to their original shape after being
stretched.
– Natural Rubber, Polyvinyl Alcohol, Chlorinated
Polyethylene, Nitrile Rubber, Polyvinyl Chloride,
Neoprene, Butyl Rubber, Viton, Teflon, and
Polyurethane.
• Non-elastomer - materials that do not
have the quality of strechability.
– Tyvek, Polyethylene (coated tyvek), and Saranex
(laminated tyvek).
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Suit Configurations
>Type I
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>Type II
>Type III
Resistance Factors
>Penetration – defined as the bulk flow of a
chemical through the protective material.
>Permeation – the diffusion of a chemical on a
molecular basis through chemical protective
clothing.
>Degradation – a change in the physical
properties of the material as a result of adverse
effects of the chemical.
S-9
Resistance Factors
>Breakthrough Time – the time it takes the
chemical to pass through the protective
material until it is first detected by an
analytical instrument.
>Permeation Rate – the mass flux (rate in mass
per unit area per unit time) of the chemical
through the protective material once it has
broken through.
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Check on Learning
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What are the two styles of
chemical protective clothing?
>Encapsulating
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>Non-encapsulating
Levels of Personal
Protective
Equipment (PPE)
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Level A
Level B
Level C
Level D
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Level A
> Substance has been identified and requires
the highest level of protection.
> Work involves a high potential for splash
or exposure to skin hazards.
> IDLH environment exists.
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Level A
> Worn when the highest level of
respiratory, skin, and eye
protection is required.
> Conditions are unknown.
> Operations are conducted in
confined, poorly ventilated areas.
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Level A - To be selected when the greatest level of skin,
respiratory, and eye protection is required.
1. Positive pressure, full face-piece self-contained breathing
apparatus (SCBA), or positive pressure supplied air respirator with
escape SCBA, approved by the National Institute for Occupational
Safety and Health (NIOSH).
2. Totally-encapsulating chemical-protective suit.
3. Coveralls.(1)
4. Long underwear.(1)
5. Gloves, outer, chemical-resistant.
6. Gloves, inner, chemical-resistant.
7. Boots, chemical-resistant, steel toe and shank.
8. Hard hat (under suit).(1)
9. Disposable protective suit, gloves and boots (depending on suit
construction, may be worn over totally-encapsulating suit)
Footnote(1) Optional, as applicable.
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Level B
> Worn when the highest level of respiratory
protection is needed and some degree of
skin protection is required.
> Presence of incompletely
identified vapors or gases.
> Atmosphere contains less
than 19.5% oxygen.
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Level B
 Direct skin contact with the contaminant
is unlikely.
Involves atmospheres with IDLH
concentrations, but vapors and gases do
not represent a severe skin hazard.
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Level B - The highest level of respiratory protection is necessary
but a lesser level of skin protection is needed.
1. Positive pressure, full-facepiece self-contained breathing
apparatus (SCBA), or positive pressure supplied air respirator with
escape SCBA (NIOSH approved).
2. Hooded chemical-resistant clothing (overalls and long-sleeved
jacket; coveralls; one or two-piece chemical-splash suit;
disposable chemical-resistant overalls).
3. Coveralls.(1)
4. Gloves, outer, chemical-resistant.
5. Gloves, inner, chemical-resistant.
6. Boots, outer, chemical-resistant steel toe and shank.
7. Boot-covers, outer, chemical-resistant (disposable).(1)
8. Hard hat.(1)
9. [Reserved]
10. Face shield.(1)
Footnote(1) Optional, as applicable.
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Level C
> Selected when the type of airborne
contaminant is known.
> Concentration level of the contaminant
has been measured.
> Criteria for using air-purifying respirators
are met.
> Severe skin hazard unlikely.
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Level C - The concentration(s) and type(s) of airborne
substance(s) is known and the criteria for using air purifying
respirators are met.
1. Full-face or half-mask, air purifying respirators (NIOSH
approved).
2. Hooded chemical-resistant clothing (overalls; two-piece
chemical-splash suit; disposable chemical-resistant overalls).
3. Coveralls.(1)
4. Gloves, outer, chemical-resistant.
5. Gloves, inner, chemical-resistant.
6. Boots (outer), chemical-resistant steel toe and shank.
7. Boot-covers, outer, chemical-resistant (disposable).(1)
8. Hard hat.(1)
9. Escape mask.(1)
10. Face shield.(1)
Footnote(1) Optional, as applicable.
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Level D
> Provides minimal protection from physical
hazards.
> Hazardous free atmosphere.
> Work function precludes the potential for
unexpected exposure to hazardous
substances.
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Level D - A work uniform affording minimal protection, used for
nuisance contamination only.
1. Coveralls.
2. Gloves.(1)
3. Boots/shoes, chemical-resistant steel toe and shank.
4. Boots, outer, chemical-resistant
5. Safety glasses or chemical splash goggles.
6. Hard hat.(1)
7. Escape mask.(1)
8. Face shield.(1)
Footnote(1) Optional, as applicable.
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Check on Learning
S-25
Summary
• Terminal Learning Objective (TLO)
• Enabling Learning Objectives (ELO’s)
• Questions
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