Location: Miami, Florida, U.S.A.

  • Construction
  • Site Development
  • Commercial


Planned property redevelopment of a 10-story, Class-A office
building slated to house a Fortune 500 Company’s Corporate
Headquarters ; construction and final occupancy was delayed
due to the presence of elevated concentrations of methane in the
subsurface related to backfilling of a historic quarry and
disposition of “lake fill.”

Conducting methane monitoring during building foundation construction

Design, installation, and testing of a sub-slab Vapor Intrusion Mitigation System (VIMS)


Comprehensive due diligence that included expanded historical
review, extensive soil vapor characterization, engineering design
of an active Vapor Intrusion Mitigation System (VIMS), and
routine agency communication to maintain and drive schedules.
TGE designed the system, obtained permits, assisted with
installation contractor selection, oversaw construction,
conducted compliance monitoring, and certified the system.


TGE met project objectives, the system “passed” all engineering
tests, and proved protective for site conditions – a satisfied
client and tenant.

Smoke testing of the sub-slab VIMS


Monitoring for methane


Monitoring for methane in passive venting system