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1.
Figure 2

Figure 2. From: Sewer Gas: An Indoor Air Source of PCE to Consider During Vapor Intrusion Investigations.

Pathways for VOCs in Sewers and Plumbing Traps

Kelly G. Pennell, et al. Ground Water Monit Remediat. ;33(3):119-126.
2.
Figure 1

Figure 1. PCE Concentrations Detected in Air During Sampling Events. From: Sewer Gas: An Indoor Air Source of PCE to Consider During Vapor Intrusion Investigations.

Notes: contains sample event descriptions. For Event 8, the air sample was collected directly from the sewer pipe itself, not the bathroom air. There are no US health-based standards for indoor air exposures to PCE; however, concentrations of 3 μg/m3 () and 4–40 μg/m3 () correspond to benchmark cancer risks

Kelly G. Pennell, et al. Ground Water Monit Remediat. ;33(3):119-126.

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