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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.
Officers in a police helicopter that happened to be over the area at the time said the series of explosions looked like a bombing run. [8] More than 13 miles (21 km) of sewer lines, including the entire two miles (3 km) of the main trunk line with a diameter of 7.5–12 feet (2.3–3.7 m), were destroyed in the blast.
December 1 – In Winchester, Massachusetts, a lighted match dropped into a sewer manhole by an employee of the Arlington gaslight company set off an explosion which injured five gas line repairmen and blew the steel manhole cover 30 feet into the air. The gas ignited along the sewer line into Rangeley, where two more manhole covers were blown ...
A series of sewer explosions rocked Louisville on Friday, Feb. 13, 1981, sending manhole covers flying and leaving gaping holes in multiple streets across the city.
A series of ten explosions took place on April 22, 1992, in the downtown district of Analco Colonia Atlas in Guadalajara city, Jalisco state, Mexico. Numerous gasoline explosions in the sewer system and fires over four hours destroyed 8 kilometres (5.0 mi) of streets. [1] Gante Street was the most damaged.
As the gas mixture flowed and mixed with air and sewer gas, the mixture ignited. In the ensuing explosion, manhole covers launched skyward as jets of fire erupted from depths of the sewer lines. One manhole cover was found several miles east in the Cleveland neighborhood of Glenville .
The massive explosion at the Sandman Signature Hotel in downtown Fort Worth, suspected as a gas leak, may be part of a worsening trend across the US. Gas leak explosions are happening more often ...
The cause of the explosions was never definitively determined. Methane naturally occurs in sewers, but it never accumulates in a concentration powerful enough to cause explosions of the magnitude seen in Ottawa. The Ottawa Gas Company vehemently insisted that the disaster could not have been caused by its lines. [3]