What is the minimum depth for which an oxygen atmospheric test is required?

The requirement for conducting an oxygen atmospheric test is based on safety regulations that outline when to assess air quality, especially in confined spaces or areas where gases may accumulate. The minimum depth for which such a test is required is typically set at 4 feet.

At this depth, there is a significant risk for oxygen deficiency, as well as the potential for hazardous gases to accumulate. Testing at this depth ensures that workers are entering environments where atmospheric conditions are safely within acceptable limits for oxygen concentration. This practice is essential to prevent asphyxiation and promote the safety of workers engaged in tasks that may expose them to these risks. Ensuring oxygen levels are adequate before entering any area below this depth is a key aspect of maintaining a safe working environment on construction sites.