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1 i i <br /> 1 TABLE 4-1 <br /> Action Levers and Appropriate PPE <br /> 1 <br /> 1 Colorimetric OVA Reading Personal Protective Equipment <br /> Indicator Above (PPE) <br /> 1 Tube Results Background(ppm) <br /> Benzene Present 0-1 Level D <br /> 1 1-10 Level C with a half-face respirator <br /> with organic vapor cartridges. <br /> 1 10-50 Level C with a full-face respirator. <br /> >50 Cease operations, and wait for <br /> ' vapors to dissipate. <br /> Benzene klgt 0-50 Level D <br /> Present <br /> 50-200 Level C with a half-face respirator. <br /> 1 200-500 Level C with a full-face respirator. <br /> 1 >500 Cease operations. Wait for vapors <br /> to dissipate. <br /> 1 <br /> 1 <br /> 1 <br /> i <br /> 1 <br /> i <br /> 1 <br /> 4� <br /> 1 <br />