NCG510556_Fact Sheet_20220725

DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
DENR/DWQ
FACT SHEET FOR CERTIFICATE OF COVERAGE (COC) DEVELOPMENT
NPDES GENERAL PERMIT COC NCG510556
Facility Information
Applicant/Facility Name:
Charlotte Douglas International Airport GW-REM
Airport Drive Release — NCDEQ/UST Section Incident #18989
Applicant Address:
Consultant — 5601 Wilkinson Boulevard, Charlotte 28208-5004
Facility Address:
Charlotte Douglas International Airport
Consultant:
Hart & Hickman, PC (H&H); H&H Job No. CDA-044
Contact Information:
Shannon Cottrill, Project MGR
2923 S Tryon Street, Suite 100 • Charlotte, NC 28203
Direct: 704-887-4605 / Mobile: [phone]
Scott Drury, PE
2923 S Tryon Street, Suite 100 • Charlotte, NC 28203
919-414-0750 / Direct/ Mobile: [phone]
Permitted Flow
Not to exceed 1.00 MGD
Type of Waste:
Vehicle fuel release (remediated groundwater]
Facility/Permit Status:
New
County:
Mecklenburg
Miscellaneous
Receiving Stream:
UT to Taggart Creek
Regional Office:
Mooresville (MRO)
Stream Index:
11-137-4
River Basin:
Catawba River
Stream Class:
C
[source to Upper Sugar Creek]
State Grid/ USGS
Quad:
G15SW / Charlotte W, NC
303(d) Listed?
No
Permit Writer:
Joe R. Corporon, P.G.
Hydrological Unit /
HUC:
03-04-38
030501030103
Date:
25Jul2022
Drainage Area (mi2):
12.563.84
Summer 7Q10 (cfs)
0.0
Winter 7Q10 (cfs):
0.0
Average Flow (cfs):
0.0
IWC (%):
100% [discharge to storm sewer]
Primary SIC Code:
ISSUANCE SUMMARY:
Project Background [quoted from the application]
The Site is being managed under the North Carolina Department of Environmental Quality
(DEQ) Division of Waste Management (DWM) Underground Storage Tank (UST) Section and
has been assigned incident #18989. H&H submitted a Free Product Corrective Action Plan
(CAP) dated October 11, 2021, for the Site to the UST Section.
In a letter dated December 1, 2021, the UST Section provided approval for CAP implementation,
pending NPDES permit approval. The purpose of the CAP is to remove subsurface free product
or light non -aqueous phase liquid (LNAPL) attributable to a release of jet fuel type A (Jet -A)
from the aboveground storage tank (AST) system located at the Charlotte Douglas International
Airport (CLT) Wilson Air Center General Aviation Fuel Farm (the Fuel Farm).
Site characterization activities conducted to date indicate the presence of subsurface LNAPL
consisting of Jet -A fuel which extends from an area immediately north of and beneath the Fuel
Farm to an unnamed tributary of Taggart Creek. The Site is considered to encompass areas
impacted by the release of LNAPL from the Fuel Farm AST systems. The Fuel Farm, tributary,
and estimated extent of subsurface LNAPL are identified in Figure 2.
Fact Sheet
NPDES COC issuance NC00510556
Page 1

DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
Proposed DPE Systems Information
DPE technology (also known as multi -phase extraction — MPE, vacuum -enhanced extraction, or
bioslurping) is an in -situ technology that uses a high vacuum system via liquid ring vacuum
pump to remove LNAPL, groundwater, and vapor from recovery wells. Liquids and vapor are
removed from recovery wells through a stinger pipe and transferred through piping from the
recovery wells to DPE system equipment which separate the vapor, LNAPL, and groundwater
Summary of Site Assessment Analytical Data for
Groundwater in Contact with LNAPL
Analyte
Concentration
(pgtL)*
Anayltical Method
SGT HEM: Non -Polar Material
3,900
EPA-1664B-SGT
Total Suspended Solids
17.000
SM-2540D
Total Organic Carbon
1.230
SM-5310C
Phenols (Total)
36
EPA-420.1
Arsenic
9.829
SW-6020B
Barium
93.5
SW-6020B
n-Butylbenzene
25.9
SM-6200
sec -Butyl benzene
24.6
SM-6200
Ethylbenzene
76.2
SM-6200
Isopropylbenzene
52.6
SM-6200
4-Isopropyl toluene
23
SM-6200
Naphthalene
151
SM-5200
Naphthalene
346
EPA-625.1
Phenanthrene
8,67
EPA-625.1
n-Propylbenzene
79.7
SM-5200
Trichloroethene
6.27
SM-6200
124-Trimethyibenzene
500
SM-6200
135-Trimethylbenzene
131
SM-6200
mp-Xylene
76.7
SM-6200
Xylene (Total)
76.7
SM-6200
Aliphatic C5-C8
211
MAVPH
Aliphatic C9-C12
4,820
MAVPH
Aromatic C9-C 10
2,480
y
MAVPH
Aliphatic C9-C18
14,400
MAEPH
Aliphatic C19-C36
139
MAEPH
Aromatic C11-C22
5,470 I
MAEPH
_Rh
6.57
SM-4500H+B
Based on the above, the General Permit's effluent monitoring Table A. (6.) applies to this
facility as having been impacted by Jet-4 fuel and other contaminants s as a combined source of
hydrocarbons (see attached). It follows that Monitoring Tables A. (1.) through A. (5.) do not
apply.
Fact Sheet
NPDES COC issuance NC00510556
Page 2

DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
DWR notes no reported history of vehicle -repair facilities in the area suggesting that parameters
of concern (POCs) would not likely include chlorinated solvents. However, the chlorinated
solvent Trichloroethylene (TCE) was detected above its laboratory practical quantitation level
(PQL= 5.0 µg/L) in monitoring well MW-8. Analyses at this location indicate 6.27 µg/L TCE
(see permit application page 11 of 42).
If future analyses detect chlorinated solvents in the effluent above surface water quality
standard, the Permittee must notify the NPDES Unit immediately (attention Joe R. Corporon,
P.G.) and apply for revised limits and monitoring conditions.
Fact Sheet
NPDES COC issuance NC00510556
Page 3