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A comment on Health Concerns Mount as More Old Sewer Pipes Are Lined with Plastic. Parent comment

Re:Health Concerns Mount as More Old Sewer Pipes Are Lined w... by flaviu2 on Tuesday November 26, 2019 @11:29AM (#21639755)
ah, I see.

> Emissions from a nearby CIPP job got indoors through cracks in the building’s foundation and irritated workers to the point that they evacuated

This is fascinating. I've always thought of dirt and concrete as being basically impenetrable to things like this, but apparently they're not!

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Re:Health Concerns Mount as More Old Sewer Pipes Are Lined w... by ryanobjc on Tuesday November 26, 2019 @01:06PM (#21640870)
Concrete is porus to water. If water can seep thru, when it’s not cracked, air can as well.
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Re:Health Concerns Mount as More Old Sewer Pipes Are Lined w... by blawson on Tuesday November 26, 2019 @05:16PM (#21643320)
Water molecules are smaller than air though, so a surface can be airtight and not be watertight.
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