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
1995 Daegu gas explosions At the ceremony, about 500 people including family members and citizens attended the ceremony and prayed for the victims' souls. 1995 Daegu gas explosions The 1995 Daegu gas explosions was a gas explosion that occurred at Daegu Metro Line 1, a construction site located in Sangin-dong, Daegu, South Korea, on 28 April 1995. At least 101 people, including 42 Yeoungnam Middle School students were killed with as many as 202 people injured. The event occurred on April 28th, 1995 at 7:52 am in the underground construction site of the 2nd Section of the Sagley Subway Line 2 at Nam High