HomeMy WebLinkAboutSP-24-35 - Supplemental - 1200 Airport Drive (3)355 Main Street | Suite 500 | Winooski, VT 05404 | w. eivtech.com
August 22, 2024
Marla Keene, PE
Development Review Planner
City of South Burlington
180 Market Street
South Burlington, VT 05403
Re: Patrick Leahy Burlington International Airport
BTV North Soil Remediation
Administrative Site Plan Permit Application
Dear Marla Keene,
We are submitting an administrative site plan application for the above referenced project. The north
concourse at the Burlington International Airport that was the location of a former fuel storage and transfer
area. In 2018, the Airport received a Sites Management Activity Complete (“SMAC”) designation for the
former fuel storage and transfer area from Vermont Department of Environmental Conservation (“DEC”);
however, residual petroleum impacts remain in soil, groundwater, and soil vapor. In accordance with §35-
804(a)(3) of DEC’s Investigation and Remediation of Contaminated Properties Rule (“IRule”), it is estimated
that approximately 3,000 cubic yards of soil will need to be replaced. This would require management and
off-site reuse or disposal at a certified landfill, depending on soil quality.
Below Grade Soil Improvements
Given the known presence of residual petroleum impacts to soil, groundwater and soil vapor associated with
the former fuel farm located within the NEXT project footprint, a vapor mitigation system will be
incorporated to prevent vapor migration into the new building. In order to remediate this area in anticipation
of the North Concourse building, the contractor will need to excavate, and appropriately reuse or replace the
soils. The vapor mitigation system will need to be installed, but can only be installed after below grade soil
improvements are completed and geothermal wells are placed. Below grade soil improvements also include
the installation of rammed aggregate piers to remediate poor structural soils and concrete footings for the
future NEXT building. Adjustments to the security fence and construction access will need to be constructed
for secure access to this area. This work is shown in multiple phases, labeled as Phases 1A, 1B, 2 and 3 within
the enclosed plans.
355 Main Street | Suite 500 | Winooski, VT 05404 | w. eivtech.com
Electrical Maintenance
In order to complete construction within the north concourse area, the existing generators and utility
transformers for the airport will be relocated across Airport Circle adjacent to the existing parking
garage.
Access Roads & Staging Areas
Access roads, the staging area, and engineering field offices are noted as temporary on Phase 3 of the
submitted plansheets. These represent final conditions for purposes of this administrative site plan
application. The NEXT north concourse project will utilize these access roads and staging areas during
construction of the building, and these areas will be removed as part of a final condition of this project.
It is anticipated that the NEXT project permits will be secured by December 2024, with construction
commencing immediately thereafter. The total impervious areas of the access roads and staging areas
described above is 25,621 square feet.
The contractor plans to begin this work as soon as permits are received this Fall. The work is estimated
to be completed by winter 2024-25.
Feel free to contact Larry Lackey, or Jacqueline Dagesse at EIV with any questions regarding this
submission, 802-324-5522.
Very Respectfully,
EIV Technical Services
Jacqueline Dagesse, MBA, CPESC
President / Environmental Engineer