What is a common hazard that may occur in a collection system?

All of the options listed represent valid hazards that can occur in a wastewater collection system.

Flooding is a concern because it can overwhelm a sewer system, leading to backups and overflows, which pose environmental and health risks. This can occur due to heavy rainfall, blockages, or system malfunctions.

Corrosion is another hazard that affects the structural integrity of pipes and components of a collection system. This can be caused by the chemical composition of wastewater, leading to premature failure of infrastructure and increasing maintenance costs.

Gas buildup is particularly dangerous as gases like hydrogen sulfide can accumulate in sewer lines. This not only poses health risks to workers but can also create an explosive atmosphere under certain conditions.

Recognizing that all these hazards can coexist and impact the operation of a collection system underscores the necessity for comprehensive risk management and safety protocols within wastewater management practices.