API TES Practice Questions - API TES Tank Entry Supervisor Exam

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An atmospheric test inside a cleaned petroleum storage tank reads 19.0% oxygen by volume. Per OSHA 1910.146 and API 2015 guidance, what action should the Tank Entry Supervisor take?

Permit entry because the reading is close to 19.5% Treat the atmosphere as oxygen deficient and ventilate before entry Allow entry with a half-face air-purifying respirator Continue with entry but require continuous monitoring only

Correct Answer:

Treat the atmosphere as oxygen deficient and ventilate before entry

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