Figure 6-5.—Supplied-air system.Figure 6-6.—Self-contained breathing apparatus(SCBA).injury may result if the respirator or its air line fails.The self-contained breathing apparatus (SCBA)(fig. 6-6) provides protection in oxygen-deficientenvironments or other environments dangerous tolife or health. Since the SCBA is the most complexrespirator in use today, use it only after receivingproper training in its use. Use the oxygen breathingapparatus (OBA) only in emergency situations. UseMark V gas masks only for protection againstchemical warfare agents and high airborneradioactivity levels. Surgical masks are for medicaluse only; never use them in place of a filterrespirator.IDENTIFICATIONOF RESPIRATOR CARTRIDGESAND GAS MASK CANISTERSEach air-purifying respirator cartridge type isdesigned specifically for the class of contaminant itremoves. Federal regulations require each cartridgetype to be color-coded. The color-coding may be in theform of an affixed label or a colored plastic cartridgecase. To identify the type to be worn for protectionagainst a6-11
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