When using a petrol-driven pump to dewater a trench, what precaution should be taken regarding exhaust fumes?

Discharging fumes away from the trench is crucial when using a petrol-driven pump for dewatering because exhaust fumes can be hazardous to health. These fumes contain harmful gases, such as carbon monoxide, which can pose serious risks in confined or poorly ventilated spaces, like a trench. By directing the exhaust away from the work area, you help to minimize the potential for inhaling these toxic gases, enhancing the safety of workers in the vicinity.

While other methods, such as ventilating the area or using a muffler, can contribute to safety, they may not be as effective in dealing with the specific risks associated with exhaust fumes in an enclosed space. Limiting pumping duration might reduce exposure, but it does not address the immediate need to manage the exhaust effectively. Thus, ensuring that the discharge of fumes is directed away from the trench is the best precaution to safeguard health.