A worker handles crystalline silica dust at a TWA of 0.06 mg/m³ respirable fraction. The current OSHA PEL for respirable crystalline silica is 0.05 mg/m³. Which control action is most immediately required?
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A
Implement engineering or work practice controls to reduce exposure below 0.05 mg/m³
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B
Provide a NIOSH-approved N95 respirator as the primary control
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C
Conduct medical surveillance only since exposure is close to the PEL
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D
Perform additional sampling before taking any action