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b . Criteria for selection <br /> Meeting any of these criteria allows use of Level D protection: <br /> • No contaminants are present. <br /> •. Work functions preclude splashes, immersion, or potential for <br /> unexpected inhalation of any chemicals. <br /> Level D protection is primarily a work uniform. It can be worn <br /> only in areas where there is no possibility of contact with <br /> contamination. <br /> 10 . 6 . 3 Additional.1 Consi r3erati ons for Selecting Leve1s <br /> of Protection <br /> Other factors which should be considered in selecting the <br /> appropriate Level of Protection are: <br /> Heat and Physical Stress - The use of protective clothing <br /> and respirators increases physical stress, especially heat <br /> stress, on the wearer. Chemical protective clothing greatly <br /> reduces body ventilation and diminishes its ability to <br /> regulate . -its temperature . Even in moderate ambient <br /> temperatures, the diminished capacity of • the body to <br /> dissipate heat can result in - one or more heat-related . <br /> problems . <br /> All chemical protective garments can cause heat stress . <br /> Somewhat less stress is associated with Level B or C when the <br /> protective clothing does not require the use of a hood, <br /> tightly fitted against the respirator face piece, and taped <br /> glove, boot, suit interfaces, since more body ventilation and <br /> evaporation may occur. As more body area is covered, the <br /> probability of heat stress increases . Whenever any chemical- <br /> protective clothing is worn, a heat stress recovery <br /> monitoring program must occur. <br /> Wearing protective equipment also increases the risk of <br /> accidents . It is heavy and cumbersome, decreases dexterity <br /> and agility, interferes with vision, and is fatiguing to <br /> wear. These factors all increase physical stress and the <br /> potential for accidents . In particular, the necessity for <br /> selecting Level A protection, should be balanced against the <br /> increased probability of physical stress and accidents . <br /> Level B and C protection reduces accident probability <br /> somewhat because the equipment is lighter and less <br /> cumbersome, and vision problems are less serious . <br /> 10-13 <br />