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i <br /> r ' Level C Operations Requirements <br /> l <br /> • Air purifying respirator equipped with organic vapor canister or cartridges (NIOSH <br /> t4 approved). <br /> s <br /> Level B Operations Requirements <br /> f <br /> s ' This level of respiratory protection is required for atmospheres with: 1) <br /> r; 6 <br /> } concentrations of known substances greater than protective factors associated with full <br /> facepiece air purifying respirators, 2)concentrations of known substances exceeding 40 <br /> percent of the substance iDLH level, or 3) less than 19.5 percent. oxygen. Respiratory <br /> protection requirements are: <br /> i <br /> g Pressure-demand full facepiece, self-contained breathing apparatus (SOBA) or <br /> pressure-demand supplied air respirator with escape SCBA (NIOSH approved). <br /> i <br /> *Note: Level B operations require approval from corporate health and, safety. <br /> i <br /> DERMAL PROTECTION <br /> The level of dermal protection required depends upon the nature of the site activities. <br /> 4 <br /> Selection of dermal protection shall be made according to need, based on the following <br /> information: <br /> i <br /> i <br /> Dermal Protection Levels <br /> Level D Operations <br /> w This level of protective clothing will be worn where work functions preclude potential <br /> -� for splashes or immersion. <br /> oul <br /> E-4 <br /> ,.� 172-19,Ro 314/91 <br />