Sewer gas Sewer gas Sewer gas is a complex mixture of toxic and nontoxic gases produced and collected in sewage systems by the decomposition of organic household or industrial wastes, typical components of sewage. Sewer gases may include hydrogen sulfide, ammonia, methane, esters, carbon monoxide, sulfur dioxide and nitrogen oxides. Improper disposal of petroleum products such as gasoline and mineral spirits contribute to sewer gas hazards. Sewer gases are of concern due to their odor, health effects, and potential for creating fire or explosions. Sewer gas is typically restricted from entering buildings through plumbing traps that create a water seal at potential
2014 Kaohsiung gas explosions the explosions occurred, citing the fragility of the ground or the ruined buildings around. The remaining 260 tons of propene inside the damaged pipes was vented out completely by Monday from both of their input and output points. Nitrogen gas was put into pipes ensuring all propene had been removed, a move which had been done earlier by the CPC. The Environmental Protection Administration also had dispatched personnel to Kaohsiung to assist local government in air pollution monitoring. On 5 August, the Kaohsiung District Prosecutor's Office issued the death certificates of two missing firefighters who had fought the fires caused