Environmental Engineering Reference
In-Depth Information
that vapors are accumulating. Construction quality assurance supervision is essen-
tial, especially to ensure that the seams of the geomembrane are sealed properly, and
that the membrane is not perforated prior to placement of the concrete slab. This can
be tested by blowing smoke beneath the barrier and visually inspecting the barrier
for any signs of escaping smoke, which should be repaired before the construction
proceeds.
Acknowledgments
Portions of this chapter were drawn from Reference Handbook for Site-
Specific Assessment of Subsurface Vapor Intrusion to Indoor Air by the Electric Power Research
Institute (EPRI), document number 1008492, with editing as appropriate to address recent research
and practical experience. EPRI's permission to use this material is hereby acknowledged and
greatly appreciated. The lead author was the same for the EPRI document and this chapter.
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