[kawhill]

“The bizarre incident is one of many involving mysterious sewer spelunkers in recent months.” I crawled through sewer pipes when I was a kid. Mom always warned me about sewer gas.

[blackdog]

My summers were spent lurking the storm drains with neighborhood pals. We went for miles. Eventually we got to experience a summer thunderstorm. We had to spend an hour hanging onto the ladder until the water subsided.

That was the last of our expeditions in the storm sewers.

[Spacetrucker]

That gas, also commonly called “swamp gas”, is known in the oil and gas industry as H2S. Probably the most deadly gas you can encounter (at concentration). Somewhere in the range of 100-200 ppm is enough to kill you at extended exposure. Above 400 ppm, death is a certainty, and quickly.

[Spacetrucker]

That gas, also commonly called “swamp gas”, is known in the oil and gas industry as H2S. Probably the most deadly gas you can encounter (at concentration). Somewhere in the range of 100-200 ppm is enough to kill you at extended exposure. Above 400 ppm, death is a certainty, and quickly.