This image shows a worker standing at the opening of a confined space—such as a tank, vault, or utility pit—preparing to climb down for what seems like a routine maintenance task. The space is dark, narrow, and poorly ventilated, with only one way in and out. No atmospheric testing has been done, no permit is posted, and the worker is entering alone without a retrieval system or standby attendant. Within minutes, an invisible hazard like oxygen deficiency or toxic gas could overwhelm them without warning.
Confined spaces are some of the most dangerous work environments because hazards are […]
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