Level A: protection is required when the greatest potential for exposure to hazards exists, and when the greatest level of skin, respiratory, and eye protection is required. Level A requires total encapsulation in a vapor tight chemical suit with positive pressure, full face-piece apparatus (SCBA) or positive pressure supplied air with escape SCBA and appropriate accessories. Lakeland Level A chemical protective clothing can also be manufactured to meet NFPA 1991 specifications.
Level B: situations call for the highest degree of respiratory protection, but a lesser need for skin protection. Level B protection calls for SCBA or positive pressure supplied air respirator with escape SCBA, plus hooded chemical resistant clothing (overalls and long sleeved jacket; coveralls; one or two piece chemical-splash suit; or disposable chemical-resistant coveralls).
Level C:Level C protection is required when the concentration and type of airborne substances is known, and the criteria for using air purifying respirators is met. Typical Level C equipment includes full-face air purifying respirators, inner and outer chemical-resistant gloves, hard hat, escape mask, and disposable chemical-resistant outer boots.
Level D: protection is the minimum protection required. Level D protection may be sufficient when no contaminants are present or work operations preclude splashes, immersion, or the potential for unexpected inhalation or contact with hazardous levels of chemicals. Appropriate Level D protective equipment may include gloves, coveralls, safety glasses, face shield and chemical-resistant, steel-toe boots or shoes.