Just a few months ago, two men were killed and one man was hospitalized when they were overcome by toxic fumes while working in an underground sewer in Phoenix. According to a local online news report, the men were working inside the 15-foot-deep sewer without protective gear, and one emerged behaving lethargically. An investigation detected high levels of hydrogen cyanide in the sewer.Sadly, these stories are making the news more often than they should. In addition to protective gear, crew workers should use a gas detector to detect any harmful toxic gas in a sewer before entering.Perhaps it’s easy to
