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9.13.4.2.(1)
ApplicationIntent
OH1
ObjectiveOH1 Indoor Conditions
Attribution
[F40-OH1.1]
Application
Application 1: 
Materials used to provide soil gas control at floors that are in contact with the ground, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in Sentence 9.13.4.1.(2), which applies to the control of the infiltration of soil gas in:
  • garages,
  • unenclosed portions of buildings served by the floors, and
  • buildings located where soil gas is at a sufficiently low concentration as to not constitute a hazard.
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Intent
Intent 1: 
To limit the probability that the performance of polyethylene used as a soil gas barrier will fall significantly below expectations with respect to:
  • air transfer resistance, or
  • strength, flexibility, and resistance to tearing, puncturing, oxidation or ultraviolet radiation, which could lead to damage during installation, which could lead to an inadequate resistance to the infiltration of soil gas, which could lead to negative effects on the air quality of indoor spaces.
This is to limit the probability of harm to persons.
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