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• Personal Protective Equipment <br /> Management Program 2.15 <br /> Some materials act differently when they are very hot and very cold. For example, PVC becomes almost <br /> brittle in very cold temperatures. If there are any questions about the stability of the protective materials <br /> under different conditions, the manufacturer should be contacted. <br /> 3.3.9 Work Load <br /> Like climactic conditions, the type of work activity may affect work duration and the ability or personnel to <br /> perform certain tasks. Similarly, the amount of protective materials a person wears will affect their ability <br /> to perform certain tasks. For example, a person in a total encapsulating suit, even at 72 OF, cannot work <br /> for more than a short period of time without requiring a break. <br /> The work schedule should be adjusted to maintain the health of the employees. Special consideration <br /> should be given to the selection of clothing that both protects and adds the least burden when personnel <br /> are required to perform strenuous tasks. Excessive bodily stress frequently represents the most <br /> significant hazard encountered during field work. <br /> 3.4 Types of Protective Materials <br /> 1. Cellulose or Paper <br /> 2. Natural and Synthetic Fibers <br /> a. TyvekTM <br /> b. NomexTM <br /> 3. Elastomers <br /> a. Polyethylene <br /> b. Saran <br /> c. Polyvinyl Chloride (PVC) <br /> d. Neoprene <br /> e. Butyl Rubber <br /> f. Viton <br /> 3.5 Protection Levels <br /> 3.5.1 Level A Protection <br /> Level A protection (a fully encapsulated suit) is used when skin hazards exist or when there is no known <br /> data that positively rule out skin and other absorption hazards. Since Level A protection is extremely <br /> physiologically and psychologically stressful, the decision to use this protection must be carefully <br /> considered. At no time will Level A work be performed without the consent of the OM. The following <br /> conditions suggest a need for Level A protection: <br /> • confined facilities where probability of skin contact is high; <br /> • sites containing known skin hazards; <br /> • sites with no established history to rule out skin and other absorption hazards; <br /> • atmosphere immediately dangerous to life and health (IDLH)through the skin absorption route; <br /> • site exhibiting signs of acute mammalian toxicity (e.g., dead animals, illnesses associated with <br /> past entry into site by humans); <br /> 1/2019 Corporate Health and Safety Management Program I ROUX 14 <br />