HomeMy WebLinkAbout18045-Seneca Place-IA-SS Vapor Sampling Report-Suite L-Approval-20240430ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
MICHAEL SCOTT
Director
Sent Via E-mail
Mr. Mark Good
Seneca Place partners, LLC
c/o New Forum
NORTH CAROLINA
Environmental Quality
April 30, 2024
9224 Kings Parade Boulevard, Suite 2101
Charlotte, NC 28273
mgood@newforum.net
Subject: Indoor Air and Sub -Slab Vapor Sampling Report, Suite L
Seneca Place Shopping Center Brownfields Property
Charlotte, Mecklenburg Name County
Brownfields Project No. 18045-14-060
Dear Mr. Good:
The North Carolina Department of Environmental Quality (DEQ) Brownfields Redevelopment
Section (BRS) has received and reviewed the Indoor Air and Sub -Slab Vapor Sampling Report
dated March 10, 2022 (Report) for the above referenced Brownfields Property. The Report
summarizes the work performed in accordance with the approved Vapor Sampling Work Plan
Revision 2.0 (Work Plan) dated August 6, 2020. The Work Plan was prepared as required by the
Environmental Management Plan dated July 9, 2020. The work was to be performed to evaluate
if construction/upfit activities, specifically the cutting of the slab to install utilities, created a
preferential pathway that allowed sub -slab vapors into the indoor air space of the building.
Review of the Report indicates that the work performed was in general accordance with the
approved Work Plan. BRS reviewed the analytical data provided in the Report for soil gas as well
as sub -slab vapor sampling and evaluated the data using the DEQ Risk Calculator. The results of
this evaluation were below the DEQ thresholds for non-residential use, with the exception of
isopropanol as a significantly contributing factor. If we exclude isopropanol, the DEQ threshold
for non-residential use are met. DEQ Brownfields concurs with the above referenced report that
this compound is likely related to building materials which are not regulated by DEQ Brownfields.
The BRS concurs that the data submitted satisfies the requirements of the sampling outlined in the
EMP, subsequent Work Plan, and therefore, Land Use Restriction 5 of the Notice of Brownfields
Property (NBP). No additional assessment of indoor air or sub -slab soil vapors pertaining to this
construction/upfit event for this unit are required at this time. Please be advised that DEQ reserves
D E Q�� North Carolina Department of Environmental Quality I Division of Waste Management
217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
NORTH CAROLINA -
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the ability to require evaluation of vapor intrusion risk under Land Use Restriction 5 of the NBP
for future phases of work.
If you have any questions, please feel free to contact me at 910-796-7408, or via e-mail at
samuel.watson@deq.nc.gov.
Sincerely,
i :�is�Gl
Samuel P. Watson
Project Manager
Brownfields Property Management Branch
ec: Scott Young, PG
NORTH CAROLINAD_E QI__A
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North Carolina Department of Environmental Quality I Division of Waste Management
217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
919.707.8200