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
December 2007 Bocaue fire December 2007 Bocaue fire On the morning of 31 December 2007 ten fireworks stores burned in Barangay Turo, Bocaue, Bulacan, causing a series explosions within the area. The fire lasted for almost an hour and caused several traffic jams in Fortunato F. Halili Avenue and the North Luzon Expressway. Bocaue is well known in the Philippines for its fireworks production. However, because of this, the town is also susceptible to large fires every New Year. In 1988, the town was rocked by earth-shaking blasts from exploding makeshift factories that produce firecrackers and other pyrotechnic devices. Another incident in 2004 even