S-2 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-3 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
S-4 Selecting Chemical Protective Clothing >Known vs. Unknown > Weather conditions >Work location >Work function > Concentration/exposure guidelines > Chemical hazard recognition
S-5 Performance Requirements Chemical Resistance Durability Flexibility Temperature Resistance Service life Cleanability Design Size Color Cost
S-6 Style of Protective Clothing >Encapsulating >Non-encapsulating
S-7 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).
S-8 Suit Configurations >Type I >Type II >Type III
S-9 Resistance Factors >Penetration – defined as the bulk flow of a chemical 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.
S-10 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.
S-15 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.
S-16 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.
S-17 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.
S-18 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.
S-19 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.
S-20 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.
S-21 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.
S-22 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.
S-23 Level D > Provides minimal protection from physical hazards. > Work function precludes the potential for unexpected exposure to hazardous substances. > Hazardous free atmosphere.
S-24 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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