NCG510556_Permit (Issuance)_20220725

DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR
Director
NORTH CAROLINA
Errwtrofpmrrrful ucrTh v
Jack Christine, A.A.E., Chief Operating Officer
City of Charlotte Aviation Department
Charlotte Douglas International Airport
P.O. Box 19066,
Charlotte, NC 28219-9066
Subject:
Mr. Christine:
7/27/2022
Issuance of Authorization to Construct (ATC)
Certificate of Coverage (COC) NCG510556
under NPDES General Permit NCG510000
Charlotte Douglas International Airport GW-REM
Mecklenburg County
General Permit Coverage. In accordance with your application to discharge remediated groundwater
(acknowledged received March 4, 2022), the Division of Water Resources (DWR or the Division) hereby
forwards this Certificate of Coverage (COC) to discharge under the subject NPDES general permit. We issue
this COC pursuant to the requirements of North Carolina General Statue 143-215.1 and the Memorandum of
Agreement between North Carolina and the US Environmental Protection Agency (USEPA) dated October 15,
2007 (or as subsequently amended).
The following information is included with your permit package:
• A copy of the Certificate of Coverage for your treatment facility
• A copy of General Wastewater Discharge Permit NCG510000
• A copy of a Technical Bulletin for General Wastewater Discharge Permit NCG510000
• Engineer's Certification, to be signed and returned to DWR upon project completion
The Division understands that you have authorized engineering consultant, Hart & Hickman, P.C. (H&H) of
Charlotte, to manage your groundwater remediation (GW-REM) and apply for this COC. Information
supporting this application includes site background, site assessment analyses, details of dual phase extraction
(DPE) system information, and an analysis of alternatives to direct discharge. The permit application package
included information provided as:
1. Figure 1 — Site Location Map
2. Figure 2 Site Map 2923
3. Figure 3 — NPDES Discharge Locations Map
4. Attachment A — Designation of H&H as Authorized Representative for the City of
Charlotte, Aviation Department (i. e., the permit applicant)
5. Attachment B — Approval for Discharge to Storm Water Sewer System
6. Attachment C — DPE Treatment System Plans and Major Component Specifications
7. Attachment D — Analytical Data for Representative Sample of Water to be Treated
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 -- 919.707.9000

DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
DWR acknowledges your consultant's site-remediation Free Product Corrective Action Plan (CAP), approved
by the NCDEQ/Division of Waste Management (DWM) on December 1, 2021, pending further approval by
NPDES.
The Division notes that you assert, based on site assessment chemical analyses, that the source of site
contamination is jet fuel type A (Jet -A), and further that fuel was likely lost to the environment via underground
fueling lines [currently out of service] associated with the Fuel Farm above -ground storage tanks (ASTs). The
quantity of fuel released is unknown but is estimated to be greater than 100,000 gallons.
We note no 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 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).
P3ease note that if future analyses detect chlorinated solvents in the effluent exceeding surface water quality
standards, you must notify the NPDES Unit immediately (attention Joe R. Corporon, P.G.) and apply for
revised limits and monitoring conditions.
Based on the above, the General Permit's effluent monitoring Table A. (6.) applies to your 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.
Future reporting under this COC shall compare all analytical results to Surface Water -Quality Standards
appropriate to each specific analyte and to a receiving -stream classified C. Please note that all chemical
analyses must apply laboratory minimum detection levels (MDLs) sufficiently sensitive to embrace each
analyte's given standard.
At no time shall treatment -system operators allow contaminated (untreated) water to discharge to surface waters
of the State. At no time shall treated water discharge such that sediment is transported and/or erosion occurs.
The Measurement Frequency "Monthly Flow" is defined as total treated effluent not -to -exceed one million
gallons (1.0 MG) per month. This assumes that the system utilizes a totalizing flow meter (or equivalent
method) to determine and record total effluent flow, and the Permittee shall report this value on quarterly
Discharge Monitoring Reports (DMRs) and on electronic Discharge Monitoring Reports (eDMRs), as required
by the Division.
Periods of no discharge shall be reported as "No flow" or "No discharge," as appropriate for any required
Quarterly DMR or eDMR period.
In accordance with your application to discharge and site -assessment Corrective Action Plan (CAP), the
Division understands that you propose to construct and operate dual phase extraction (DPE) systems #1 and #2
to remediate groundwater consisting of [but not limited to]:
• well array for groundwater extraction [-18 wells (variable)]
• DPE w/ demister, blower, and filter
• moisture separator w/ pump and totalizing flow meter
• flow equalizing tank (1,500 gal; double wall) w/ level switch and skimmer to
• product holding tank w/ level switches [high -high; low/low]
• EQT transfer pump to oil/water separator
• water holding tank (225 gal)
• WHT Transfer pump / w totalizing flow meter
• bag filter [25 gpm min/ 75 psi min]
• three (3) each phased zeolite units (in series)
• appurtenant piping to outfall
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DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
The above treatment works will be installed at the Airport Drive Release Site, 5414 Airport Drive, Charlotte
and operated in accord with the discharge application, as described in text, system schematics and Site Plans
attached thereto. Treated groundwater shall discharge to a local stormdrain(s) approved by City of Charlotte
Aviation Department under zero -flow receiving -stream conditions (7Q10 and 30Q2 = 0.0 cfs).
Effluent ultimately discharges to an unnamed tributary (UT) to Taggart Creek [Stream Segment 11-137-4], a
waterbody currently classified C within hydrological unit 03-04-38 [HUC 030501030103] of the Catawba
River Basin.
If treatment facilities fail to perform satisfactorily, to include creating nuisance conditions, the Permittee shall
take immediate corrective action, including those actions as may be required by this Division, such as the
construction of additional or replacement wastewater treatment or disposal facilities. Failure to abide by the
requirements contained in this ATC may subject the Permittee to an enforcement action by the Division of
Water Resources in accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
Please notify Corey Basinger of the Division's Mooresville Regional Office (MRO) by telephone [phone]-
1699 at least three (3) working days in advance of operating the treatment -system so that he may determine the
need for final inspection requirements. Contact MRO during the normal office hours from 8:00 a.m. until 5:00
p.m. Monday through Friday, excluding State Holidays.
NPDES Permit Contact. If you have questions concerning the requirements of this permit, please contact the
MRO or Joe R. Corporon, P.G. [[e-mail]] of the NPDES program.
If any parts, measurement frequencies or sampling requirements contained in the general permit are unacceptable,
you have the right to request an individual permit by submitting an individual NPDES permit application. Unless
such demand is made, the certificate of coverage shall be final and binding.
Please note that this Certificate of Coverage (COC) is not transferable except after notice to the Division of
Water Resources. The Division may modify, revoke, or reissue this COC as changing conditions or new
information may warrant. This permit does not affect your legal obligation to obtain other permits which may
be required by the Division of Water Resources, the Division of Land Resources, the Coastal Area Management
Act, or any other federal or local government.
Sincerely,
DocuSigned by:
i,
8328B44CE9EB4A1...
for Richard E. Rogers, Jr., Director
Division of Water Resources
ec: NPDES General Permit Files [Laserfiche]
DWR/MRO, Attn: Supervisor, Corey Basinger, MRO/SWPS
Scott Drury, P.E., Project Manager
Consultants, H&H, P.C., 2923 South Trion Street, Charlotte, North Carolina 28203
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DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
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DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
CERTIFICATE OF COVERAGE - NCG510556
Under GENERAL PERMIT NCG550000
TO DISCHARGE TREATED GROUNDWATER, AND SIMILAR WASTEWATERS
GENERATED DURING REMEDIATION OF SOILS AND GROUNDWATER IMPACTED WITH
PETROLEUM FUELS AND RELATED HYDROCARBONS
UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended, the
City of Charlotte Aviation Department
is hereby authorized to install and operate wastewater treatment facilities consisting of groundwater
and vapor -recovery wells [as dual phase extraction (DPE) systems], treatment detention basins, bag
filters, carbon filters, appurtenant pumps, and sample ports, for the treatment of contaminated
groundwater, these facilities located at the
Charlotte Douglas International Airport
Fuel Farm Above Ground Storage Tank (AST) System
5414 Airport Drive, Charlotte
Mecklenburg County
to receiving waters designated as the unnamed tributary (UT) to Taggart Creek [stream segment 11-137-4], a
waterbody currently classified C within hydrological unit 03-04-38 [HUC 030501030103] of the
Catawba River Basin, in accordance with the effluent limitations, monitoring requirements, and other conditions
set forth in Parts I, II, III and IV of General Permit NCG510000, as attached.
This certificate of coverage shall become effective August 1, 2022
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day July 27, 2022 DocuSignedby:
8328B44CE9EB4A1...
for Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
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DocuSign Envelope ID: 45050B2F-F023-4BDA-A98E-A23512125042
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