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III. Level C - Me concentration (s) and type (s) of airborne <br /> substance (s) is known and the criteria for using air <br /> purifying respirators are met. <br /> The following constitute Level C equipment; it may be used as <br /> appropriate. <br /> 1. Full-face or half-mask, air purifying respirators <br /> (NIOSH approved) . <br /> 2. Hooded chemical-resistant clothing (overalls; two- piece <br /> chemical-splash suit; disposable chemical-resistant <br /> overalls) . <br /> 3. Coveralls. (1) <br /> 4. Gloves, outer, chemical-resistant. <br /> 5. Gloves, inner, chemical-resistant. <br /> 6. Boots (outer) , chemical-resistant steel toe and <br /> shank. (l) <br /> 7. Boot-covers, outer, chemical-resistant (disposable) (1) <br /> 8 . Hard hat. (1) <br /> 9. Escape mask. (1) <br /> 10. Face shield. (1) <br /> Footnote (1) Optional, as applicable. <br /> IV. Level D - A work uniform affording minimal protection: <br /> used for nuisance contamination only. <br /> The following constitute Level D equipment; it may be used as <br /> appropriate: <br /> 1. Coveralls. <br /> 2 . Gloves. (1) <br /> 3. Boots/shoes, chemical-resistant steel toe and shank. <br /> 4 . Boots, outer, chemical-resistant (disposable) . (1) <br /> 5. Safety glasses or chemical splash goggles. (l) <br /> 6. Hard hat. (1) <br /> 7. Escape mask. (1) <br /> 8 . Face shield. (1) <br /> Footnote (1) Optional, as applicable. <br /> B. The types of hazards for which levels A, B, C, and D protection <br /> are appropriate are described below: <br /> I. Level A - Level A protection shall be used when: <br /> 1 . The hazardous substance has been identified and requires <br /> the highest level of protection for skin, eyes, and the <br /> respiratory system based on either the measured (or <br /> potential for) high concentration of atmospheric vapors, <br /> gases, or particulates; or the site operations and work <br /> functions involve a high potential for splash, <br /> immersion, or exposure to unexpected vapors, gases, <br /> or particulates of materials that are harmful to skin or <br /> capable of being absorbed through the skin, <br /> 44 <br /> site safety i Health Plan Rev./1.0 <br /> October 20, 1997 <br />