Which is a recommended action to take in the event of a pesticide fire?

In the event of a pesticide fire, the recommended action is to construct berms to contain contaminated runoff water. This is crucial because using water to extinguish the fire may not be advisable, as water can spread the hazardous materials and increase the risk of contamination. Additionally, covering the fire with a tarp can also be ineffective or dangerous, as it does not address the flames directly and could potentially trap heat and exacerbate the situation.

Constructing berms serves a dual purpose by not only helping to contain any runoff that might be contaminated with pesticides but also protecting the surrounding environment from chemical spread. This action is both proactive and protective, ensuring that the potential harm from runoff is minimized while allowing trained emergency personnel to manage the fire safely and effectively. Calling emergency services and evacuating the area is important but is not the only action; thus, focusing specifically on managing the risk posed by runoff is a key part of responding appropriately to a pesticide fire.