Boston burb explosions - gas leaks into sewer mains?
All the gas explosions/fires in the Boston suburbs this past week reminded me of two similar situations that took place in Louisville, KY years ago that caught lots of MSM attention at the time. The first one (absolutely massive) involved release of hexane into the sewers and the 2011 one involved a water line that "was leaking underground near the house, and pushed a brick into the gas line, which caused a hole in the line." Wonder if the Boston situation might have involved gas leaks into the sewer mains, which then caused houses with poorly vented drain lines to explode?
February 13, 1981
The Sewer Explosions - two women going to work at a hospital drove under the railroad overpass on Hill Street near 12th Street when there was a gigantic blast, and their car was hurled into the air and onto its side. At the same time, a police helicopter was heading toward the downtown area when the officers saw an unforgettable sight: a series of explosions, "like a bombing run," erupting along the streets of Old Louisville and through the University of Louisville campus.
More than two miles of Louisville streets were pockmarked with craters where manholes had been and several blocks of Hill Street had fallen into the collapsed, 12-foot-diameter sewer line. Miraculously, no one was hurt seriously, but homes and businesses were extensively damaged and some families had to be evacuated. Louisville was in the headlines and on broadcast news throughout the country for several days.
The cause of the explosion was traced to the Ralston-Purina soybean processing plant southeast of the university campus, where thousands of gallons of a highly flammable solvent, hexane, had spilled into the sewer lines. The fumes from the hexane created an explosive mixture, which lay in wait in the larger sewer lines.As the women drove under the overpass, a spark from their car apparently ignited the gases.
Several blocks of Hill Street soon became an open trench, as crews cleared away the debris and prepared to replace the sewer line. The trench remained open throughout the summer while work continued. It took 20 months to repair the sewer lines, and another several months to finish the work on the streets.
Ralston-Purina pleaded guilty of four counts of violating federal environmental laws, and paid a fine of $62,500. In February, 1984, the company agreed to pay MSD more than $18 million in damages. Many millions more were paid to other government agencies and private individuals who suffered damage.
Above material from 2016 Louisville Metro Hazard Mitigation Plan - Page 97 of 322 (CTRL-f for hexane):
http://louisvillemsd.org/sites/default/files/inline-files/lm_hmp_2016_final.pdf
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Louisville sewer explosions:
https://en.wikipedia.org/wiki/Louisville_sewer_explosions
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Photo gallery 1981 explosions:
https://www.courier-journal.com/picture-gallery/news/2018/02/22/the-day-louisvilles-sewers-exploded-in-1981/110407474/
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2011 explosions:
http://www.wave3.com/story/16201770/investigation-into-cause-of-okolona-home-explosion-continues/
http://louisvilleky.com/louisville-explosion-closes-downtown/