How many apparatus crews are recommended for underground recovery work after an explosion?

The recommendation for maintaining at least two apparatus crews for underground recovery work after an explosion is grounded in safety and efficiency. Having two crews ensures that there is a backup available, allowing teams to rotate in and out without overexerting any single crew. This is particularly important in the aftermath of an explosion, where conditions can be unpredictable and hazardous. The presence of multiple crews can also enhance communication and coordination during the recovery efforts, leading to a more effective response to assess and mitigate dangers that remain underground. Furthermore, the ability to have one crew assist or support the other in case of emergencies helps to ensure that safety protocols are upheld. This strategic approach ultimately allows for a more thorough and effective recovery operation while prioritizing the safety of the rescue personnel.