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PROTECTIVE CLOTHING

UNCLASSIFIED

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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)

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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

> Weather conditions

>Work location

>Work function

> Concentration/exposure guidelines

> Chemical hazard recognition

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Performance Requirements

•Chemical Resistance

•Durability•Flexibility•Temperature Resistance

•Service life•Cleanability•Design•Size•Color•Cost

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Style of Protective Clothing

>Encapsulating >Non-encapsulating

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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 >Type II >Type III

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Resistance Factors>Penetration – defined as the bulk flow of achemical through the protective material.

>Degradation – a change in the physical properties of the material as a result of adverse effects of the chemical.

>Permeation – the diffusion of a chemical on a molecular basis through chemical protective clothing.

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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 >Non-encapsulating

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Levels of Personal

Protective Equipment (PPE)

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Level A

Level B

Level C

Level D

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Level A

> IDLH environment exists.

> Substance has been identified and requires the highest level of protection.

> Work involves a high potential for splash or exposure to skin hazards.

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Level A

> Worn when the highest level of respiratory, skin, and eye protection is required.

> Operations are conducted in confined, poorly ventilated areas.

> Conditions are unknown.

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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.

> Atmosphere contains less than 19.5% oxygen.

> Presence of incompletely identified vapors or gases.

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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.

> Severe skin hazard unlikely.

> Criteria for using air-purifying respirators are met.

> Concentration level of the contaminant has been measured.

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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.

> Work function precludes the potential for unexpected exposure to hazardous substances.

> Hazardous free atmosphere.

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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

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Summary

• Terminal Learning Objective (TLO)

• Enabling Learning Objectives (ELO’s)

• Questions