NC0083887_Permit Issuance_20060710

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
July 10, 2006
Mr. T.J. Orr, Aviation Director
Charlotte/Douglas International Airport
P.O. Box 19066
Charlotte, NC 28219
Subject: NPDES Permit Issuance
NPDES Permit NCO083887
Charlotte/Douglas International Airport
Mecklenburg County
Dear Mr. Orr:
Division personnel have reviewed and approved your application for renewal of the
subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. This
permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1
and the Memorandum of Agreement between North Carolina and the U.S. Environmental
Protection Agency dated May 9, 1994 (or as subsequently amended
The permit authorizes the City of Charlotte to discharge treated wastewater and
stormwater from the Charlotte/Douglas International Airport to outfalls in Coffey Creek, an
unnamed tributary to Ticer Branch and an unnamed tributary to Taggart Creek, which are
Class C waters in the Catawba River Basin. The permit includes discharge limitations /or
monitoring for flow, total suspended solids (TSS), oil & grease, benzene, toluene, propylene
glycol, acute toxicity and other parameters.
The modifications in the May 24th draft, remain a part of the final permit:
A limit for benzene of 71 ug/1 has been added to the permit based on results of the
reasonable potential analysis that indicated the potential to exceed the allowable
effluent concentration. The monitoring frequency for benzene will be twice per
month.
• The monitoring frequency for the daily maximum toluene limit of 11 ug/1 has been
increased to twice per month, per 15A NCAC 2B 0500 surface water monitoring
regulations for treatment facilities.
• Effluent monitoring for propylene glycol has been added to outfall 002, outfall 003,
and instream sampling station 004. This will replace effluent monitoring for only
glycol. Discussions between Division staff and Charlotte Douglas International
Airport have determined that propylene glycol is now predominantly used for
deicing/anti-icing. The monitoring frequency will remain the same.
JCaro na
tura��y
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.ncwuerquality.om Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer —500 Recyded/tOq Post consumer Paper

Letter to Mr. Orr
Page 2
I
The "boilerplate" language is considered standard and cannot be changed to represent
individual facilities. The requirement to include standard permit conditions verbatim or by
reference is stipulated in 40 CFR 122.43. Language is interpreted appropriately for each
facility.
If any parts, measurement frequencies or sampling requirements contained in this
permit are unacceptable to you, you have the right to an adjudicatory hearing upon
written request within thirty (30) days following receipt of this letter. This request must
be in the form of a written petition, conforming to Chapter 150B of the North Carolina
General Statutes, and filed with the office of Administrative Hearings, 6714 Mail Service
Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit
shall be final and binding.
Please take notice that this permit is not transferable. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the
legal requirements to obtain other permits, which may be required by
the Division of Water Quality, or permits required by the Division of Land Resources,
Coastal Area Management Act, or any other Federal or Local governmental permits may
be required.
If you have any questions or need additional information, please contact Ms.
Jacquelyn Nowell at telephone number [phone], extension 512.
Sincerely,
n'W IVY .E.
Alan W. F3imek, P.E.
Attachments
cc: Mooresville Regional Office/Surface Water Protection Section
Mr. Rusty Rozzelle, MCWQP 700 North Tryon St. Suite 205 Charlotte NC 28202
Brian Hennessey, City of Charlotte P.O. Box 19066 Charlotte NC 28219
Aquatic Toxicology Unit
NPDES File
Central Files

Permit No. NCO083887
'STATE OF NORTH CAROLINA
DEPARTMENT *OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER AND STORMWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELUdINATION SYSTEM
In compliance with the provision 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,
City of Charlotte
is hereby authorized to discharge wastewater and stormwater from a facility located at
Charlotte/Douglas International Airport
5501 Josh Birmingham Parkway
Charlotte, North Carolina
Mecklenburg County
to receiving waters designated as Coffey Creek, UT Taggart Creek, and UT Mcer Branch in the
Catawba River Basin in accordance with effluent limitations, monitoring requirements, and
other conditions set forth in Parts I, H, III, and N hereof.
The permit shall become effective August 1, 2006
This permit and the authorization to discharge shall expire at midnight on June 30, 2010
Signed this day July 10, 2006
C;-A
Alan W. Klimek, P.E.; Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NCO083887
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge
are hereby revoked, and as of this issuance, any previously issued permit bearing this
number. is. no longer effective. Therefore, the exclusive authority to operate and
discharge from this facility arises under the permit conditions, requirements, terms,
and provisions included herein.
City of Charlotte
is hereby authorized to:
1. Outfall 001 (bulk jet fuel tank farm). Continue to operate ' a stormwater treatment
system (consisting of oil/water separator and retention pond) at Charlotte/Douglas
International e Airport, to treat stormwater . collected from the north side of the airport
including the bulk jet fuel tank farm area, and discharge through Outfall 001 into an
unnamed tributary to Ticer Branch, a Class C water in the Catawba River Basin, at the
location specified on the attached map.
2. Outfall 002 (main airport runwayaarea). Continue to discharge untreated stormwater,
used de-icing fluid, and washwater collected from the majority of the runway and tenant
areas at Charlotte/Douglas International Airport, through,Outfa11002 into Coffey Creek, a
Class C water in the Catawba River Basin, at the location specified on the attached map.
3.. Outfall 003 (southeastern runway area). Continue to operate A stormwater treatment
system (retention pond) at Charlotte/Douglas International Airport, to ' treat stormwater,
used de-icing fluid, and wastewater collected from the southeastern side of the. facility
(includes small portion of runway and a few tenants), and discharge through Outfall 003
into an unnamed tributary to Taggart Creek, a Class C water in the Catawba River Basin,
at the location specified on the attached map.
The Charlotte/Douglas International Airport (CDIA) is located at 5501 Josh
Birmingham Parkway in Charlotte within Mecklenburg County.

Discharge Point 001
Latitude 35°13'47"
Longitude 80°56'5T'
Discharge Point 002
Latitude 35"11'55"
Longitude 80°56'55"
Discharge Point 003
Latitude 35112'25"
Longitude 80"55'45"
Instream Point 004
Latitude 35013'54"
Longitude 80°56'19"
Charlotte/Douglas Int. Airport - NCO083887 Facility ' 4t
Location.::.'
USGS Quad p: G15NW
Receiving Stream: Coffey Creek (002, 004)
UT Ticer Branch (001)
UT Taggart Creek(003) �$CALE 1:24,000
Stream Class: C
orth

Permit No. NCO083887
A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge
stormwater from Outfall 001- Jet Fuel Tank Farm from the north side of the CDIA facility. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REgUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
F1ow2
Discharge Event
Estimate
E
Total Suspended Solids
45 mg/1
Monthly
Grab
E
Oil and Greases
45 mg/1
Monthly
Grab
E
pH4
Monthly
Grab
E
Benzene
71 ug/l
2/Month
Grab
E
Ethylbenzene
Monthly
Grab
E
Toluene
11 ug/l
2/Month
Grab
E
Xylene
Monthly
Grab
E
Acute Toxicity5
Quarterly
Grab
E
Notes:
1. Sample locations: E- Effluent sample collected after the oil water separator/retention pond treatment system.
2. Discharge from the retention pond is controlled by a manual gate valve, and may not coincide with a storm
event. Therefore, discharge flow for each manual release shall be estimated based on the surface area and
drop in depth of the retention pond. if there is no discharge during a month, enter "No Flow" on the Discharge
Monitoring Report submission for that month.
3. Where possible, the grab sample shall be slimmed from the surface of a quiescent (calm water) zone.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. Acute Toxicity (Fathead Minnow, 24-hour) Quarterly Monitoring; refer to Special Condition A (6)- Acute
Toxicity Monitoring (guarterly).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
There shall be no direct discharge of tank solids, tank bottom water, or the rag layer.

Permit No. NCO083887
A (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge
stormwater and washwater from Outfall 002- Main Aircraft Runway Area (which includes runoff from
the majority of the runway and tenant areas at CDIA, and includes vehicle washing, fuel storage, aircraft fueling,
aircraft maintenance, and de-icing chemical storage/application). Such discharges shall be limited and monitored
by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING RE9UIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow
2
2
E
Total Rainfall (inches)
2
2
E
Event Duration (minutes)
2
2
E
Total Suspended Solids
Quarterly
Grab
D
Oil and Grease3
45 mg/1
Quarterly
Grab
D
Detergents (MBAS)
Quarterly
Grab
D
PH4
Quarterly
Grab
D
Propylene Glycols
3/Year
Grab
D
NH3 as N5
3/Year
Grab
D
Acute Toxicity6
Episodic
Grab
D
Notes:
1. Sample locations: E- Effluent, D- The southwest quadrant of the intersection of Piney Top Road.
2. For each representative storm sampling event, the total precipitation, storm duration, and total flow must
be monitored. Total flow shall be either: a) measured continuously; b) calculated based on the amount of
area draining to the outfall, the amount of built -upon impervious area, and the total amount of rainfall; or
c) estimated by the measurement of flow at 20-minute intervals during the rainfall event.
3. Where possible, the grab sample shall be skimmed from the surface of a quiescent (calm water) zone.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. Propylene Glycol shall be monitored during three discharge events each year at the time of de-icing/anti-
icing, or during the next separate discharge event following de-icing/anti-icing. NH3-N shall be monitored
only if urea is used for de-icing.
6. Acute Toxicity (Fathead Minnow, 24-hour). Refer to Special Condition A(7)- Acute Toxicity Monitoring
(Episodic).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

r p
Permit No. NCO083887
A (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge
stormwater and washwater from Outfall 003- Southeastern Runway Area (which includes runoff from
the southeastern side of the CDIA facility containing a small portion of runway area and a few tenants, and
includes vehicle washing, aircraft washing, aircraft fueling and maintenance, fuel storage, and de-icing chemical
storage/application). Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REsUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow
2
2
E
Total Rainfall (inches)
2
2
E
Event Duration (minutes)
2
2
E
Total Suspended Solids
Quarterly
Grab
E
Oil and Greases
45 mg/1
Quarterly
Grab
E
Detergents (MBAS)
Quarterly
Grab
E
PH4
Quarterly
Grab
E
Propylene Glycols
3/Year
Grab
E
NH3 as Ns
3/Year
Grab
E
Acute Toxicitys
Episodic
Grab
E
Notes:
1. Sample locations: E- Effluent sample collected after the stonmwater retention pond treatment system.
2. For each representative stone sampling event, the total precipitation, storm duration, and total flow must
be monitored. Total flow shall be either: a) measured continuously; b) calculated based on the amount of
area draining to the outfall, the amount of built -upon impervious area, and the total amount of rainfall; or
c) estimated by the measurement of flow at 20-minute intervals during the rainfall event.
3. Where possible, the grab sample shall be skimmed from the surface of a quiescent (calm water) zone.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. Propylene Glycol shall be monitored during three discharge events each year at the time of de-icing/anti-
icing, or during the next separate discharge event following de-icing/anti-icing. NH3-N shall be monitored
only if urea is used for de-icing.
6. Acute Toxicity (Fathead Minnow, 24-hour). Refer to Special Condition A (7)- Acute Toxicity Monitoring
(Episodic).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NCO083887
A (4). INSTREAM MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Permittee shall monitor
Instream Station 004- Background (located in Coffey Creek upstream of the CDIA facility and just south
of Walker Street), as specified below:
INSTREAM
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REgUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Location'
Total Suspended Solids
Quarterly
Grab
I
Oil and Grease2
Quarterly
Grab
I
Detergents (MBAS)
Quarterly
Grab
I
pH
Quarterly
Grab
I
Propylene Glyco13
Annual
Grab
I
NH3 as N3
Annual
Grab
1
Notes:
1. Sample locations: I- Instream background station, upstream of CDIA facility, just south of Walker Street.
2. Where possible, the grab sample shall be skimmed from the surface of a quiescent (calm water) zone.
3. Propylene Glycol shall be monitored annually during a discharge event at the time of de-icing/anti-icing, or
during the next separate discharge event following de-icing/anti-icing. NH3-N shall be monitored only if
urea is used for de-icing.

Permit No. NCO083887
A (5). STORMWATER QUALITATIVE MONITORING REQUIREMENTS
Qualitative monitoring requires an inspection of each stormwater outfall regardless of representative outfall status
and shall be performed as specified below. Qualitative monitoring is for the purpose of evaluating the effectiveness
of the Stonnwater Pollution Prevention Plan (SPPP) and assessing new sources of stormwater pollution. No
analytical tests are required. Qualitative monitoring of stormwater outfalls does not need to be performed during a
representative storm event.
STORMWATER
CHARACTERISTICS
MONITORING REgUIREMENTS
Measurement
Frequency
Sample Type
Sample Location'
Color
Semi -Annual
Visual
SDO
Odor -
Semi -Annual
Visual
SDO
Clarity
Semi -Annual
Visual
SDO
Floating Solids
Semi -Annual
Visual
SDO
Suspended Solids
Semi -Annual
Visual
SDO
Foam
Semi -Annual
Visual
SDO
Oil Sheen
Semi -Annual
Visual
SDO
Other obvious indicators of
stormwater pollution
Semi -Annual
-
Visual
SDO
Notes:
1. Sample locations: Qualitative monitoring shall be performed at each stormwater discharge outfall (SDO)
regardless of representative outfall status. Qualitative monitoring will be required at outfalls 001, 002, and
003.
2. Qualitative monitoring will be conducted twice per year, once in the spring (April June) and once in the fall
(September -November).

y
r'
Permit No. NCO083887
SUPPLEMENT TO EFFLUENT SHEETS
SPECIAL CONDITIONS
A (6). ACUTE TOXICITY MONITORING- Quarterly
Outfall 001(Jet Fuel Tank Farm)
The permittee shall conduct quarterly toxicity tests using protocols defined as definitive in E.P.A.
Document EPA/600/4-90/027F entitled "Methods for Measuring the Acute Toxicity of Effluents to
Freshwater and Marine Organisms." The monitoring shall be performed as a Fathead Minnow
(Pimephales promelas) 24 hour static test. Effluent samples for self -monitoring purposes must be
obtained below all waste treatment. The testing will be performed upon the first discharge from the
facility during each quarter. The quarters defined as the months of January -March, April -June,
July -September, *and October -December.
The parameter code for this test is TAE6C. All toxicity testing results required as part of this permit
condition will be entered on the Effluent Discharge Form (MR-1) for the month in which it was
performed, using the appropriate parameter code. Additionally, DWg Form AT 1 (original) is to be sent
to the following address:
Attention: NC DENR / DWg / Environmental Sciences Section
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as- all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a quarter in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the
report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to
the Environmental Sciences Branch at the address cited above.
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water guality indicate potential impacts to the receiving stream, this permit may be
re -opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival and appropriate environmental controls, shall constitute an invalid test and will
require immediate follow-up testing to be completed no later than the last day of the monthfollowing the
month of the initial monitoring.
A (7). ACUTE TOXICITY MONITORING- Episodic
Outfalls 002 and 003 (Runway Areas)
The permittee shall.conduct FIVE acute toxicity tests using protocols defined as definitive in E.P.A.
Document EPA/600/4-90/027F entitled "Methods for Measuring the Acute Toxicity of Effluents to
Freshwater and Marine Organisms." The monitoring shall be performed as a Fathead Minnow
(Pimephales promelas) 24 hour static test. Effluent samples for self -monitoring purposes must be
obtained- below all waste treatment. Sampling and subsequent testing will occur on at least five
occasions during the first year following permit issuance, during five discharge events at the time of de-

v t T
Permit No. NCO083887
icing/anti-icing or during the next separate discharge event following de-icing/anti-icing. After
monitoring of the first five toxicity tests, the permittee will - conduct one test annually, with the annual
period beginning in January of the next calendar year. The annual test requirement must be performed
and reported by June 30. If no discharge occurs by June 30, notification will be made to the Division by
this date. Toxicity testing will be performed on the next discharge event for the annual test requirement.
The parameter code for this test is TAE6C. All toxicity testing results required as 'part of this permit
condition will be entered on the Effluent Discharge Form (MR-1) for the month in which it was
performed, using the appropriate parameter code. Additionally, DWQ Form AT 1 (original) is to be sent
to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response. data. Total residual
chlorine of the effluent toxicity sample- must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be
re -opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test, conditions as specified in the cited document, such as minimum control
organism survival and appropriate environmental controls, shall constitute an invalid test and will
require immediate follow-up testing to be completed no later than the last day of the month following the
month of the initial monitoring.
A (8). STORMWATER POLLUTION PREVENTION PLAN
The permittee shall maintain the Stormwater Pollution Prevention Plan, herein after referred to as the
Plan. The Plan shall be considered public information in accordance with Boilerplate Part II, Section
E.10 of this permit. The Plan shall include, at a minimum, the following items:
a. Site Plan: The site plan'shall provide 'a description of the physical facility and the potential
pollutant sources which may be expected to contribute to contamination of regulated stormwater
discharges. The site plan shall contain the following:
(1) A general location map (USGS quadrangle map, or appropriately drafted equivalent map),
showing the facility's location in relation to transportation routes and surface waters, and
the name of the receiving water(s) to which the stormwater outfall(s) discharges. If the
discharge is to -a municipal separate storm sewer system, the name of the municipality
and the ultimate receiving waters, and accurate latitude and longitude of the point(s) of
discharge must be shown.
(2) A narrative description of storage practices, loading and unloading activities, outdoor
process areas, dust or particulate generating or control processes, and waste disposal
practices.
(3) A site map (or series of maps) drawn to scale with the distance legend indicating location
of industrial activities (including storage of materials, disposal areas, process areas, and
loading and unloading areas), drainage structures, drainage areas for each outfall and
activities occurring in the drainage area, building locations and impervious surfaces, the
percentage of each drainage area that is impervious. For each outfall, a narrative
description of the potential pollutants which could be expected to be present in the
regulated stormwater discharge.

(4) .
(5)
Permit No. NCO083887
A list of significant spills or leaks of pollutants that have occurred at the facility during
the 3 previous years and any corrective actions taken to mitigate spill impacts.
Certification that the stormwater outfall
stormwater discharges. The certification
requirements found in Boilerplate Part II,
have been evaluated for the presence of non -
statement will be signed in -accordance with the
Section B.1 1.
b. Stormwater Management Plan: The stormwater management planshall- contain a narrative
description of the materials management practices employed which control or minimize the
exposure of significant materials to stormwater, including structural ' and non-structural
measures. ' The stormwater management plan, at a minimum, shall incorporate the following:
(1) Feasibility Study. A study addressing the technical and economic feasibility of changing
the methods of operations and/or storage practices to eliminate or reduce exposure of
materials and processes to stormwater. Wherever practicable the permittee should
consider covering storage areas, material handling operations, manufacturing or fueling
operations to prevent materials exposure to stormwater. In areas where elimination of
exposure is not practicable, the stormwater management plan shall document the
feasibility of diverting the-stormwater runoff away from areas of potential contamination.
(2) Secondary Containment. A schedule to provide secondary containment for bulk storage
of liquid materials, storage of Section 313 of Title ' III of the Superfund Amendments. and
Reauthorization Act (SARA) water priority chemicals, or storage of hazardous materials to
prevent leaks and spills from contaminating stormwater runoff. If the secondary
containment devices are connected directly to stormwater conveyance systems, the
connection shall be controlled by manually activated valves or other similar devices
[which shall be secured with a locking mechanism] and any stormwater that accumulates
in the containment area shall be at a minimum visually observed prior to release of the
accumulated stormwater. Accumulated stormwater shall be released if found to be
uncontaminated. Records documenting the 'individual making the observation, the
description of the accumulated stormwater and the date and time of the release shall be
kept for a period'of five years.
(3) BMP Summary. A narrative description of Best Management Practices (BMPs) to be
considered such as, but not limited to, oil and grease separation, debris control,
vegetative filter strips, infiltration and stormwater detention or retention, where
necessary. The need for structural BMPs shall be based on the assessment of potential of
sources contributing significant quantities of pollutants to stormwater discharges and
data collected through monitoring of stormwater discharges.
(4) Inspection schedules of stormwater conveyances and controls and measures to be taken
to limit or prevent erosion associated with the stormwater systems.
C. Spill Prevention and Response Plan (SPRP): The Spill. Prevention and Response Plan shall
incorporate an assessment of potential pollutant sources based on a materials inventory of the
facility. Facility personnel (or team) responsible for implementing the SPRP shall be identified in
the plan. A responsible person shall be on -site at all times during facility operations that have
the potential to contaminate stormwater runoff through spills or exposure of materials
associated with the facility operations. The SPRP must be site stormwater specific. Therefore, a
SPCC plan may be a component of the SPRP, but may not be sufficient to completely address the
stormwater aspects of the SPRP. The common elements of the Spill Prevention Countermeasures
and Containment Plan (SPCC) with the SPRP may be incorporated by reference into the SPRP.
d. Preventative Maintenance and Good Housekeeping Program: A preventative maintenance
program shall be developed. The program shall document schedules of inspections and
maintenance activities of stormwater control systems, plant equipment and systems. Inspection
of material handling areas and regular cleaning schedules 'of these areas shall be incorporated
into the program.

e• Permit No. NCO083887
. Employee Training, Training schedules shall' on *an , annual basis on proper s be developed and tr '
maintenance activities for all personnel response and cleanup�g Provided at a minimum
Involved in any of the fciprocedures
ty s Operate ns preventative
potential to contaminate stormwater
Implementingthe g runoff. Facile that have the
training shall be identified in the plan ' Personnel (or team) responsible for
f. Responsible Party. The Stormwater Pollution Prevention Plan shall identify
responsible for the overall coordination, development,
Responsibilities for all components of the P P t' implementation, a specific positions)
Provided.
Plan shall be documented and p sitionto () assignments revisionthe Plan.
g• Plan Amendment: The permittee shall amend the Plan w
construction, operation, or maintenance which has a si whenever there is a change in design,
discharge of pollutants via a point source to s l�cant effect on the potential for the
Prevention Plan shall be reviewed and updated on ace waters. The Stormwater Pollution
al basis.
The .Director may notify the permittee when the Plan does no
requirements of the permit, y�i{� 30 days of such notice, the
schedule to the Director for modifyingt meet one or more of the minimum
shall provide certification in writing the Plan to meet pe�ttee shall submit a time
(in accordance with Bow minimum
� n ents. The permittee
Director that the changes have been made. ,Section B. 11.) to the
h• Facility Inspections: Inspections of the facility
minimum on a semiannual schedule, once in te and all
t °water systems shall occur at a
the spring (Apt _June). The inspection and any f all ( ue mber - November) and once during
shall be documented, recording date and time of inspection,subsequent maintenance activities performed
and a narrative description of the facility's stormwater control
mpg the inspection
systems. Records of these inspections shall be inco 0 1 systems, plant equipment and
Prevention Plan. rp rated into the Stormwater Pollution
Visual monitorin
g as required in A (5) Stormwater M
Monitoring shall be performed in addition to facility ins*P ectionsonitoring Requirements/Qualitative
i• Implementation: Implementation of the Plan shall
measurements, inspections, maintenance activities anInclude trainingd°entation of all monitoring,
Including the log of the sampling data. Activities taken to implement Provided to employees,
Industrial activities, including vehicle maintenance activitial s associated with the
required documentation shall be kept on -site fora period must also be recorded. All
Director or his authorized representative immediately upon re
P d of five years and made available to the
Po quest.
A (9). STORMWATER MI UMUM MOMTORING
AND REPORTING REgUIREMENTS
Minimum monitoring and reporting requirements are as follow
the Director of the Division of Water Quality: sunless otherwise approved in writing by
a• If a facility has multiple discharge locations with substanti
that are required to be sampled, the permittee may Petition ally identical stormwater discharges
status. If it is established that the stormwater dischar esthe Director for representative outfall
permittee is granted representative outfallstatus, then sampling a ubstantially identical and the
at a reduced number of outfalls. P g requirements may be performed
b. Qualitative monitoring for - color, odor,
weather flow shall be performed at all stormsvvatedisch sin
monitoring shall be documented and recor g� visible sheens and dry
discharge outfall locations. All qualitative
Prevention Plan.. Qualitative monitoring of orrisstormto � d with the Stormwater Pollution
during a representative storm event. ails does not need to be performed
once in .the spring (April -June) and once thefanS monitoring will be performed twice per ear,
. (eptember-November). P Y '

Permit No. NCO083887
C. Stormwater samples ' collected to meet the analytical monitoring requirements of this permit shall
be collected from a discharge resulting from a representative storm event (see Boilerplate Part II,
Section A), unless otherwise specifled. Failure to monitor storm events in accordance with the
specified .frequency shall constitute a violation of this permit.
d. Detergents used outdoors shall be biodegradable. The pH of the discharge shall be in the range
of 6 to 9 standard units.
e. Analytical results from sampling during the final year of the permit term -shall be submitted with
the permit renewal application.
f. This permit regulates wastewater and stormwater discharges associated with industrial activity.
Non-stormwater discharges which shall be allowed in the stormwater conveyance system are:
(1) All other discharges -that are authorized by an NPDES permit.
(2) Uncontaminated groundwater, foundation drains, air -conditioner condensate without
added chemicals, springs, waterline and fire hydrant flushing, water from footing drains,
flows from riparian habitats and wetlands.
(3) Discharges resulting from fire -fighting or fire -fighting training.
g. If the storm event monitored and reported in accordance with this permit coincides with a non-
stormwater discharge, the permittee shall separately monitor and report all parameters as
required under the non-stormwater portion of this permit and provide this information with the
stormwater discharge monitoring report.
h. Glycol and Urea Usage. The permittee shall be responsible for summarizing the amount of glycol
(and urea if applicable) dispensed each month for de-icing/anti-icing activities, and submit this
data on an annual basis. This information shall be submitted with the February monthly DAM,
covering the previous calendar year.

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO083887
Facility
Information
Applicant/Facility Name:
City of Charlotte /Charlotte/Douglas International Air -port
Applicant Address:
P.O. Box 19066 Charlotte, NC 28219
Facility Address:
5501 Josh Birmingham Parkway Charlotte, NC 28219
Permitted Flow
NA
Type of Waste:
Commercial
Facility/Permit Status:
Renewal
Facility Classification
County:
Mecklenburg
Miscellaneous
Receiving Stream:
UT Ticer Creek,
Coffey Creek,
UT Taggart
Creek
Regional Office:
Mooresville
Stream Classification:
C
USGS TooQuad:
G15NW
303(d) Listed?:
No
Permit Writer:
Jackie Nowell
Subbasin:
030834
Date:
05/09/2006
Drainage Area (mi2)i
NA
Summer 7 10 (cfs)
NA
Winter 7Q10 (cfs):
NA
Avera e Flow (cfs):
NA
IWC (%):
Primary SIC Code:
4581
SUMMARY OF FACILITY INFORMATION AND WASTELOAD ALLOCATION
Charlotte/Douglas International Airport is requesting a renewal for its NPDES permit The
Airport has three outfalls and one outfall for instream sampling only (004). The facility
discharges used deicing fluid, stormwater and washwater. The airport has a total of 16740
tenants. This is an increase since the previous permit renewal.
Outfall 001- Discharges into UT Ticer Creek- Discharge is stormwater runoff from the jet fuel
tank farm. Stormwater is treated through an ofl/water separator (0.036 MGD) and discharged
into a retention pond. Facility in the process of installing a filter system that pond effluent will
pass through before discharging into outfall 001. There have been numerous permit violations
with toluene,O&G, and TSR at this outfall, the filter should help with compliance with these
parameters. Filter installed in June 2005. BTEX values are now mostly below detection.
Outfall 002- Discharges to Coffey Creek. Mostly receives stormwater runoff from the majority
of the main airport runway and tenant areas. This outfall is being relocated further
downstream for better access and to be more representative of instream conditions.
Outfall 003- Discharges to UT Taggart Creek. Mostly receives stormwater runoff from the
southeastern side of the airport facility and contains a small portion of the runway area and a
small number of tenants. Stormwater is directed through a retention pond prior to
overflowing to Taggart Creek.
Outfall 004 is an upstream monitoring site in Coffey Creek located upstream of the facility.
RECEIVING STREAM INFORMATION:
Ticer Creek, Coffey Creek and UT Taggart Creek are not listed on North Carolina's 2004 303(d)
impaired streams list or on the draft 2006 303(d) Impaired Streams list.
Cherlone/Douglas International Airport Pnetsheei.
NPDES Renewal
Page 1

INSTREAM MONITORING: t ,
Upstream station 004: located in Coffey Creek upstream of the CDIA (Charlotte Douglas '
International Airport)
Frequency: Quarterly
Parameters: TSS, Oil and Grease, MBAS, pH
Frequency: Annually
Parameters: Glycol- will be defined as propylene glycol, and NH3 as N
Facility did not sample instream at station 004 from Sept. 2002 until June 2004. No annual
samples of glycol or NH3 taken at 004.
Monitoring results in October 2004, TSS=31 mg/l, MBAS=0.1 mg/l. O&G= <5 mg/l, pH=6.69
SU
Monitoring results in September 2004, TSS=46 mg/l, MBAS=<0.2 mg/l. O&G= <5 mg/l, pH=5.6
SU
Monitoring results in June 2004, TSS=9 mg/1, MBAS=0.1 mg/l. O&G= <5 mg/l, pH=6.8 SU
Monitoring results in Jan. 2005, TSS=17 mg/l, MBAS=0.11 mg/l. O&G= <5 mg/l, pH=6.9 SU,
propylene glycol <20 mg/1
Monitoring results in April 2005, TSS=20 mg/l, MB_AS=0.15 mg/l. O&G= <5 mg/l, pH=6.19 SU,
propylene glycol <20 mg/1 -
Monitoring results in July 2005, TSS=15 mg/l, MBAS=0.23 mg/l. O&G= <5 mg/l, pH=7.07 SU,
Recommendation: Renewal of instream monitor_ ing at Upstream Station 004. Facility
must start consistent quarterly monitoring.
TOXICITY TEST RESULTS:
Outfall 001 -Quarterly Acute Toxicity Fathead mirkrow- 24 hour. Test performed on a
discharge event every quarter.
Facility passed all tests in 2003 and 2004. *Per the' Compliance Evaluation Inspection done
July 2005.
---Quarterly acute toxicity monitoring failed in 1st quarter 2005. Followup acute testing not
done in February. Followup in March 2005 failed.' No testing in done in April 2005.
Recommendation: Renewal of acute toxicity test for Outfall 001
Outfalls 002 and 003 - Acute toxicity monitoring -Episodic
Tests run in January and February 2003, January 2004, no tests reported since January 2004
Recommendation Renewal of Acute episodic toxicity monitoring for Outfalls 002 and
003.
PRIORITY POLLUTANT ANALYSIS RESULTS:
PPA not done on this facility's discharge of stormwater iunoff.
COMPLIANCE REVIEW:
Compliance Evaluation Inspection done in July 2005, Facillity received unsatisfactory ratings
for 1) Records/Reports, 2) Self -Monitoring Program, and Stormwater Pollution Prevention Plan.
Facility has had exceedences for several parameters at Outfall 001 including Oil & Grease, TSS,
pH, and Toluene - daily maximum exceeded several times in 2003, 2004, and 2005. Facility
had frequency violations for benzene, ethylbenzene, Oil and Grease, toluene, xylene and pH.
Late and missing DMRs were also reported to DWQ.
Compliance record of this facility has been addressed by DWQ with the issuance of several
NOVs and civil assessments. It should be noted that a carbon filter has been installed to help
with compliance with limits/monitoring for BTEX.
Charlotte/Douglas InternatiOlIal Airport Fiictsheet
NPDES Renewal
P14,e 2

REASONABLE POTENTIAL ANALYSIS
RPA was run on BTEX data collected at Outfall 001 from February 2004 to March 2006.
Benzene, toluene, ethylbenzene and xylene are sampled monthly at Outfall 001. Toluene is
limited at 11 ug/1 for protection of the instream standard, the assumption was made in 2002
that the receiving streams have 7Q 10, 30Q2, and Average flows = 0 cfs. NC Standard for
toluene is 11 ug/l. Benzene now has a NC freshwater human health standard of 71.4 ug/l
(adopted in 4/2003). Ethylbenzene and xylene have EPA National water quality criteria values
of 5700 ug/l and 780 ug/l, respectively.
Ethylbenzene and xylene did not show reasonable potential to exceed the water quality criteria.
No monitoring for these parameters will be required.
Benzene indicated reasonable potential to exceed the water quality standard based on 25 data
values and a max. predicted concentration that exceeded the allowable concentration.
Recommend limit of 71 ug/1 .
Toluene already limited at 11 ug/l. Parameter indicated reasonable potential to exceed the
water quality standard based on 25 data values and a max predicted concentration that
exceeded the allowable concentration. Recommend continuation of limit of 11 ug/L
MBAS is discharged from the outfalls, however the NC water quality standard is applicable only
to streams classified as water supply. Therefore no RPA was done for this parameter. Effluent
monitoring will be continued since the receiving streams have low 7Q 10 flows.
PROPOSED CHANGES:
• Addition of a limit for benzene of 71 ug/1 based on results of the reasonable potential
analysis that indicated potential to exceed the water quality standard. Monitoring for
benzene will be twice per month. Based on NCAC 0500 regulations for Class I treatment
facility.
• Increase monitoring for toluene limit to twice per month, per NCAC 0500 regulations for
Class I treatment facility.
• Per request from MRO and Charlotte Douglas International Airport, monitoring for
propylene glycol has been added to outfalls 002 and 003, it will also be sampled at the
instream sampling point known as 004. This will replace monitoring for only glycol at 002,
003, and.004. There is no NC standard or EPA water quality criteria for propylene glycol,
will monitor and analyze results of acute toxicity tests to determine if more stringent
measures need to be taken in the future.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: 05/24/2006
Permit Scheduled to Issue: 07/ 17/2006
Projected Effective Date of Permit: 09/01/2006
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Ja*e Nowell at [phone] ext. 512.
/ '11 1 /4 I I1ATF.• �/Z,3/ZOI
CharlotteiDouglas International Airport Pactsheet
NPDES Reno%al
Page 3

REGIONAL OFFICE COMMENT:
u
NAME: r DATE:
NPDES SUPERVISOR COMMENT:
NAME: DATE:
CharlotteiDouglas International Airport Factsheet
NPDES Renewal
Paue 4

. REASONABLE POTENTIAL ANALYSIS
Charlotte/Douglas International Airport Outfall 001
NCO083887 Ow = 0.2245 MGD
Time Period Februay 2004- March 200E
Ow (MGD) 0.2245 WWTP Class
7010S (ds) 0 IWC (%) 0 70I0S 100
701OW(ds) 0 0 701OW- 100
3002 (ds) 0 03002 100
Avg. Stream Flow. 0A (ds) 0 0 OA 100
RecVing Stream UT Mcer Branch Stream Class C
STANDARDS &
PARAMETER
TYPE
CRITERIA
M
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
(1)
zwos/
5FAyr
a
/ac MaA dL1►
AtibraWcw
choertr
AwN
Acute:
WA
Benzene
C
71.4
uglL
25
9
170.9
_
Chrocsi --
71
Acute:
WA
FlItrationsystem brought cntine In Jrine 2005, ,,'
Toluene
NC
11.0
ugJl
25
9
497.8
S '' • �`
_
Chron�:
_
11--
— — — -•s —
Acute:
WA
Ethytbenzsne
NC
5700
ug/L
25
11
277.0
Chronic;
5.700
' ,
Acute:
WA
Xylene
NC
780.
ugll
25
13
1880.0
—
f
Acute:
7
Copper
NC
7
AL
7.3
uglL
0
0
WA
---�--
----- ---- ---
Acute:
22
„ S
Cyanide
NC
5
N
22
10
uglL
0
0
WA
_
Acute:
WA
Fluoride
NC
1.800
uglL
0
0
WA
_ _
Chrorrir~
_
1,800
—
— --- — — - — — —
Acute:
34
Lead
NC
25
N
33.8
ug/L
0
0
WA
Chron�: -
25•
— — — — — — — —
Acute:
WA
Mercury
NC
12
nWL
0
0
WA
_
Acute:
WA
Molybdenum
A
3,500
UA
0
0
WA
Acute:
261
Nickel
NC
86
261
uWL
0
0
WA
_
Ctvordc
Acute:
WA
Phenols
A
1
N
ug/L
0
0
WA
Chronic: --•
1 —
—
Acute:
56
Selenium
NC
5.0
56
uglL
0
0
WA
Ctvotsicc: ---
5 --
— — — — — —
Acute:
1
Silver
NC
0.08
AL
1.23
uplL
0
0
WA
_
—
r
Acute:
67
Zinc
NC
50
AL
67
ug/L
0
0
WA
Chron�: -
50
— — —
• Legen& — Freshwater Discharge
C a Cam&xgenla
NC a Non-carck"erric
A c Aesthetic
CDIArpa2o06, rpa
5/9/2006

REASONABLE POTENTIAL ANALYSIS
I Benzene I Toluene I
Date
Data
BDL--MDL
Results
1 Jul-2005
c
1.0
0.5
Std Dev.
2
<
1.0
0.5
Mean
3 Apr-2005
<
1.0
0.5
C.V.
4 Feb-2005
9.4
9.4
n
5 , Jan-2005
<
1.0
0.5
6
<
1.0
0.5
Mult Factor=
7
1
1.0
0.5
Max Value
e
<
1.0
0.5
Max Pred Cw
9
<
1.0
0.5
10
<
1.0
0.5
11 Jan-2006
<.
1.0
0.5
12
<.
1.0
0.5
13 Mar-2006
<.
1.0
0.5
14 Dec-2004
4-3
4.3
15.
'<
1.0
0.5
16
<
1.0
0.5
17 Sep-2004
<
1.0
0.5
18
33.0
33.0
19
1.1
1.1
20
<
1.0
0.5
21
0.9
0.9
22 Apr-2004
18.0
18.0
23 Mar-2004
8.5
8.6
24
21.0
21.0
25 Feb-2004
8.5
8.5
26
27
yy
Date
Data
BDL=IMDL
Results
8.1736
1
Jul-2005
1.0
0.5
Std Dev.
4.5076
2
-
1.0
0.5
Mean
1.8133
3
Apr-2005-
1.0
0.5
C.V.
25
4
Feb-2005a
38
38.0
n
5
Jan-2005"
1.0
0.5
5.1800
6
1.0
0.5
Mult Factor=
33.0 ug4.
7
1.0
0.5
Max. Value
170.9 uglL
8
1.0
0.5
Max. Prod Cw
9
1.0
0.5
10
1.0
0.5
11
Jan-2006
1.0
0.5
12
1.0
0.5
13
Mar-2006.
1.0
0.5
14
Dec-20D4
19
19.0
15
1.0
0.5
16
1.0
0.5
17
Sep-2004
1.0
0.5
18
53
53.0
19
4.2
4.2
20
1.0
0.5
21
0.5
0.5
22
Apr-2004`
76.0
76.0
23
Mar-2004
40.0
40.0
24
97.0
97.0
25
Feb-2004
40.0
40.0
26
27
26.9057
15.0292
1.7902
25
5.1300
97.0
497.6
CDIAtpa2006, data
1 ' 5/9/2006

REASONABLE POTENTIAL ANALYSIS
Ethylbenzene I Xylene
Date Data
BDL-1/2DL
Results
1 Jul-2005
1.0
0.5
Std Dev.
12.6934
2
1.0
0.5
Mean
7.0880
3 Apr-2005
1.0
0.5
C.V.
1.7908
4 Feb-2005
14.
14.0
n
25
5 Jan-2005
-5.9
5.9
6
1.0
0.5
Mult Factor =
6.1300
7
-:1.0
0.5
Max Value
64.0
8
1.0
0.5
Max Pred Cw
277.0
9
_
1.0
0.50
10
1.0
0.50
11 Jan-2006
1.0
0.50
12 -
1.0
0.50
13 Mar-2D06
1.0
0.50
14 Dec-2004
11
11.00
15
1.0
0.50
16
1.0
0.50
17 Sep-2004
1.0
0.60
18
17
17.00
19
1A
1.40
20
- 1.8
1.80
21
1.2
1.20
22 Apr-2D04
9.9
9.90
23 Mar-2004
27.0
27.00
24 c
54.0
54.00
25 Feb-2004
27.0
27.00
26
27
Date
Data
BDL--I2DL
1
Jul-2005
;f<f
3.0
1.5
2
c
3.0
1.5
3
Apr-2005
6.7
6.7
4
Feb-2005
'r
144
144.0
5
Jan-2005
130
130.0
6
`. <r;
3.0
1.5
7<'•
3.0
1.5
8
<>
3.0
1.5
9
<'
3.0
1.5
10
. <.
3.0
1.5
11
Jan-20D6
<'
3.0
1.5
12
<;
3.0
1.5
13
Mar-2D06
.c
3.0
1.5
14
Dec-2004
�'
101.0
101.0
16
3.0
1.5
16
3.0
1.5
17
Sep-2DD4
5.4
5.4
18
150.0
150.0
19
12.0
12.0
20
8.9
8.9
21
17.0
17.0
22
Apr-2004
220.0
220.0
23
Mar-2004
2D0.0
200.0
24 r
400.0
400.0
25 -.
Feb-2004
200.0
200.0
26
27
Results
Std Dev.
103.1341
Mean
64.5200
C.V.
1.5985
n
25
Mult Factor = 4.6500
Max. Value 400.0
Max. Pred Cw 1860.0
CDIArpa2006, data
-2- 6/9/2006

Re: Draft Permits (12)
Subject: Re: Draft Permits (12)
From: John Giorgino <[e-mail]>
Date: Wed, 05 Jul 2006 11:07:18 -0400
To: Jackie Nowell <[e-mail]>
Jackie, that should have gone through OK.
Jackie Nowell wrote:
John Giorgino wrote:
Jackie, I have reviewed the following permits (I am late getting back to you on
some of them, but did not have any comments). Thanks for forwarding them.
NCO025321
NCO021962
N00074705
NCO023884
NC0005177
NC0000361
NC0000400
NCO084620
NCO085839
NC0000353
NC0000175
NCO060534
Hello John,
Do you have any comments on NC0083887-Charlotte Douglas International Airport? It
was forwarded on May 24, 2006. Thanks
Jackie
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
"The real work of men was hunting meat. The invention of agriculture was a giant step
in the wrong direction, leading to serfdom, cities, and empire. From a race of
hunters, artists, warriors, and tamers of horses, we degraded ourselves to what we
are now: clerks, functionaries, laborers, entertainers, processors of information." -
Edward Abbey
I of 1 7/5/2006 11:07 AM

14i1.1jRob
1.4
PUBLIC.INOTICE
`� , Public Notice' )
r
Stale of North -Carolina
$ S Enyrronfnenfat INana jernent Commission/IPDES .Urnt
Ivtail Service Cei%ter,g g� i
27699 1617 � �* :; ti ,Y s�
1
F;y #t'.Sfs~'+- I *,crr t d_
t r Notificgtion of Intent to Issue a NODES .1Nastewpfer Permit
On the bgsis of ft%rough staff review and application ofNC General s#atufe� },4 2 } ^
"other lawful standards atict regirlations;;the North Ccirolrnp'Eniro.nmentaF'taiana emQnao �OO.�rnd. {' I
b ►lmsro 'I
:rproposes fo''issue a Natrona) Pollutant Discharge EUminafion=System {NPDESj �ivastewater perrt�if tothet: t i
person(sj listed below effecfive 45 days frm fhe ubfrsh daterof -this"
,° r
1, r p x
. }. - ? 4 x {-''%•jt .b o q, c, •^s 7 N1 rr ! ..I, •4.*t ++'-'•Y '-„ ,
Written commenf regarding the proposed permit will be accepted until 30Jays after°thepublish cfat of ti
4 i.y�.r `
ithis notice qll comments received pnor fo'thdt date are -considered in the final defermrnatraiis tegcirdmg"
the proposed peripit The Director of the t C Divislorl of water. Quality may decide to hold a ublic meeting
t.Y;
for the' proposed perrrii should the'brvision receive a'significant degree of interest - r 'g i .3
.,, s' +.keha'
i Copies of fhe dra'ff permit and other Su�ggrtin information qn file used to determine condjtrc ns{present
m the draft permit are available upon request and 6
:and/or requests fcosts' f,
or inforrration•#o the NCDivisron"o Wa er Qual'te'at the reproduction Lve vtail comments;;
Source Branch at 919-733=5083 extension`52Q Please include'.fhe NPDES pe m�t number (attached enPan't.
`communication fnteresfed:person5 maity 1 Y
' Raleigh�NC 27604 i }48 between the h uraslof 8i00ta mDand 600 p m t ter�revarlew the inform
Sals(�iaryr$treet,?
i. w ; , i.ri i tation on file r
(,Charlotte Mecklenburg UtilityxDepa;tment'.(4000„Westmont t Chat otte, NC 282:}7jhas apphecf Corr
.renewal of NPDES permit NC002497Q for' the McAlpine Creek WiNTP in ivlecklenburg Cqunfy This permitted,
11
y(_o�d .facility drschprges 64 MGD treaf, d wasteJwater.;to McAlpine Creek Fn the Catawba River. B` "' "
.CBgD :ammortra nifragen fecal;Colrform and:;total<"resfdual`chlonne farafer psrn Cuiron
discharge may affect future allocations in this portion of fhe Catawba River_ Basin. :, g4altrte This
Gough :Eton Inc (PO Box 669583 Charlotte ' NC 2822b) h¢s. applied. for renewc.c' h ..
for the' Gough Econ,. !nc VviWTP in Mecklenburg County This of NPDES permt NCd058084':
wastewate{r town r�nnamed tributary to the;Catawba River to the Catavviba River BiasrnaSorrie pearerre
nefe
,dt
maybe water quality limited, whiclh may affect future allocations m this p pion of the�Catawba River.
1 Basin ° -
} x y
l : } ��
NPDES.Permit-Number?NC0083887 Cityoff.Charlotfe McklenburgCount hps:.a `
Y d for renewal pf its
permrt..for Chd'rlofte ;Douglas: Internatiohal::Airport„ di$6hidrging .treated wastewater andastorrnwgter .to'
F
Coffey Creek `UT Ticer'Branch and UTTaggdrt Creekinthe Catawba River Basin: Currenfly total suspended`
i solids :oil and gre rse ben;'erie and t.oluene are water qualify limited This discharge may ciffect.future
allocations in this portion of the receiving stream x
�1�Iuz�p

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit I [A
Water Quality Section , r
Attention: Jackie Nowell ! 1 1
SEP
Date: September 7, 2005 1 _
NPDES STAFF REPORT AND RECOMMENDATI01S-- — -
County: Mecklenburg
NPDES Permit No.: NCO083887
MRO No.: 05-22
PART I - GENERAL INFORMATION
1. Facility and address: Charlotte -Douglas International Airport
Post Office Box 19066
Charlotte, N.C. 28219
2. Date of investigation: August 17, 2005
3. Report prepared by: Michael L. Parker, Environmental Engineer II
4. Person contacted and telephone number: Brian Hennessey, P.E., [phone].
5. Directions to site: The Charlotte -Douglas International Airport (CDIA) is located at 5501
Josh Birmingham Parkway on the west side of the City of Charlotte.
6. Discharge point(s), list for all discharge points:
Outfall001 Outfall002* Outfall002** Outfall003 Outfa11004
Latitude: 350 13' 47" 350 12' 18" 350 11' 55" 350 12' 25" 35 ° 13' 54"
Longitude: 80' 56' 57" 800 56' 56" 800 56' 55" 800 55' 45" 800 56' 19"
*Existing outfall location
**Proposed outfall relocation
USGS Quad No.: G 15 NW
7. Site size and expansion area consistent with application: Yes. Sufficient area is available
for expansion, if necessary.
8. Topography (relationship to flood plain included): The site is relatively flat, 0-2% slopes.
The site is not located in a flood plain.
9. Location of nearest dwelling: Approx. 1500+ feet from the airport site.

Page Two
10. Receiving stream or affected surface waters: Unnamed tributaries to Ticer Creek, Coffey
Creek and Taggart Creek.
a. Classification: C (for all receiving streams)
b. River Basin and Subbasin No.: Catawba 030834
C. Describe receiving stream features and pertinent downstream uses: all outfalls
(with the exception of outfall 004) discharge to dry ditches, which eventually
discharge to their respective receiving streams.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. -a. Volume of wastewater: Intermittent discharge from all three outfalls (outfall 004
is for instream sampling only).
Outfall 001 consists of stormwater runoff from the jet fuel tank farm. All
stormwater from this area is treated through an oil/water separator and then
discharged into a retention pond, which also acts as secondary containment.
Discharges from the retention pond are through a manually operated gate valve,
which means that discharges may not coincide with a storm event. CDIA is also
in the process of having a filter system designed, which will provide additional
treatment of the retention pond's effluent, and potentially eliminate the sporadic
non -compliances with Toluene, Oil and Grease, and TSR that this outfall
occasionally experiences.
Outfall 002 is an instream monitoring point in Coffey Creek. This outfall consists
of stormwater runoff from the majority of the main airport runway and tenant
areas. CDIA has requested in this renewal that this outfall be relocated to provide
better access and be more representative of instream conditions, especially with
future airport expansion being planned in late 2005 or early 2006.
Outfall 003 consists of stormwater runoff from the southeastern side of the site,
which includes a small portion of the runway area and a few tenants. This
stormwater is directed through a retention pond prior to overflowing into Taggart
Creek. The NC Air National Guard, which is located adjacent to CDIA, also
discharges into Taggart Creek under a separate NPDES Permit.
Outfall 004. No treatment exists. CDIA is required to monitor Coffey Creek
upstream of the airport at a point designated as outfall 004 (upstream sample
point). No wastewater or stormwater is discharged through this outfall.
b. What is the current permitted capacity: All outfalls are intermittent.
C. Actual treatment capacity of current facility (current design capacity): 0.036
MGD (outfall 001).

Page Three
d. Date(s) and construction activities allowed by previous ATCs issued in the
previous two years: There have been no ATCs issued in the past two years. An
ATC may be necessary for the WWT additions planned for outfall 001.
e. Description of existing or substantially constructed WWT facilities: The existing
WWT facilities at outfall 001 consist of a 0.036 MGD oil/water separator
followed by a retention pond. There is also a retention pond at outfall 003.
f. Description of proposed WWT facilities: WWT facilities are being planned for
outfall 001 (see Part II, No. 1(a) above). These proposed changes may effect the
facility description in the renewed permit.
g. Possible toxic impacts to surface waters: Toxic impacts potentially resulting
from the discharge of glycol (de-icing fluid) should be evaluated prior to permit
reissuance.
h. Pretreatment Program (POTWs only): Not Needed.
2. Residual handling and utilization/disposal scheme: Residuals generation at any of the
outfalls is not expected.
3. Treatment plant classification: No rating.
4. SIC Code(s): 5171 Wastewater Code(s): 37, 39 MTU Code(s): 53000
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved (municipals only)? Public monies were used in the construction of this facility.
2. Special monitoring or limitations (including toxicity) requests. CDIA is not requesting
any changes to either the current monitoring or effluent limitations during this renewal.
3. Important SOC/JOC or Compliance Schedule dates: This facility is neither under an SOC
nor is one being considered at this time.
4. Alternative analysis evaluation: There is no known alternative to the current discharges.

Page Four
PART IV - EVALUATION AND RECOMMENDATIONS
The permittee, Charlotte -Douglas International Airport (CDIA), requests renewal of the
subject permit. The permit provides for the approval to discharge de-icing fluid, stormwater, and
wash water through three (3) outfalls. Modifications planned for CDIA during the term of the
new permit are detailed in Part II, No. 1(a) above.
Pending a final technical review of CDIA's renewal request by the NPDES Unit, it is
recommended that the NPDES Permit be renewed.
r-
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Whole Effluent Toxicity Testing Self -Monitoring Summary
January 18, 2006
FACILITY REQUIREMENT YEAR JAN
FEB MAR APR
MAY JUN JUL
AUG SEP OCT NOV DEC
Carolina Trace Subdivision WWTP chr lim: 76%; no tox until expand to 1.0MGD 2002
NCO038831/001 Begin-II/I/2001 Frequency-Q + Jan Apr Jul Oct NonComp:Single 2003
County. Lee Region: RRO Subbasin: CPFI3 2004
PF: 1.0 Special 2005
7Q10: 0.49 IWC(-/°) 76.0 Order 2006
Cary north WWTP chr lim: 90-/. ;f 2002 -
Pass - -
Pass - -
Pass - - Pass
NCO048879/001 Begin: l0/I/2003 Frequency: Q Feb May Aug Nov + NonComp:Single 2003 -
pass -- -
Pass - -
pass - - Pass -
County. Wake Region: RRO Subbasin: NEU02 2004 -
Pass - -
Pass - -
Pass - - Pass -
PF- 12.0 Special 2005 -
Pass - -
Pass - -
Fag >100 >100 Pass
7Q10:0.30 IWC(%)95.8 order: 2006
Cary South WWTP chr lim: 90% 2002 -
Pass - -
Pass - -
Pass - - Pass -
NCO065102/001 Begiw 10/1/2003 Frequency. Q Feb May Aug Nov + NonComp:Single 2003 -
Pass - -
Pass •- -
Pass - - Pass -
County. Wake Region: RRO Subbasin: NEU02 2004 -
Pass - -
Pass - - -
Pass - - Pass -
PF: 12.8 Special 2005 -
Pass - -
Pass - • -
Pass - - Pass
7Q10: 0.3 IWC(°/.) 90 order: 2008
Catawba WWTP chrlim:2.1% 2002 -
Pass - -
Pass - --
Pass - - Pass »
NCO025542/001 Begin: l0/I/2005 Frcqucncy: Q Feb May Aug Nov + NonComp:Single 2003 -
Pass - -
Pass -
Pass - - Pass -
County Catawba Region: MRO Subbasin: CTB32 2004 -
Pass - »
Pass -
Pass - - Pass -
PF- 0.225 Special 2005 -
Pass - -
Pass - -
Pass - - Pass
7Q10: 16 IWC(%) 2.1 Order: 2006
Centerclalr Nursing Home chr lim: 90% 2002 Pass
- - Pass
- - Pass
- - Pass - -
NCO036561/001 Begin:5/1/2004 Frequency:0 Jan Apr Jul Oct + NonComp:Single 2003 Pass
- --- Pass
- - Pass
- --- Pass - »
County Davidson Region: WSRO Subbasin: YAD07 2004 Pass
- - Pass
- - Pass
- - Pass - -
PF: 0.010 Special 2005 Pass
- - Pass
- - Pass
- - Pass -
7Q10: 0.0 IWC(°/.) 100 Order- 2006
Chadbourn WWTP chr lim: 90% if 2002 -
- pass -
- Pass -
- Pass - - Pass
NCO021865/001 Begin 9/1/2004 Frequency. Q Mar Jun Sep Dec + NonComp:Singic 2003 -
- Pass -
-- Pass -
- Pass - - Pass
County Columbus Region: WIRO Subbasin: LUM58 2004 -
- Pass>100(p) >100(p)
>100(P) Pau,3,100(P) -
- Pass - - pass
PF: 1.0 Special 2005 -
- Pass -
» Pass -
- Pass - -
7Q10. 0.15 IWC(%.)90 Order: 2006
Charles F. Cates & Sons P-2 chr monit (100,50,25,12.5,6.25) K 2oo2 aA
- - <6.26
- - 35A
- - 17.7 - -
NC0001970/001 Begin:2/1/1996 Frequency Q Jan Apr Jul Oct NonComp: 2003 36A
- -- 17.7
- - 35.4
- - 17.7 - -
County. Duplin Region: WIRO Subbasin: CPF22 2004 17.7
- - 17.7
- - 35.4
- - Late 35.4 -
PF:0.50 Special 2005 17.7
- - 17.7
- - 17.7
- - Late 17.7
7Q10. 0.0 IWC(-/.) 100 Order; 2006
Charlotte -Douglas Airport-001 24hr LC50 ac monit epic Rhd 2002 -
- - -
- - -
- - - - -
NCO083887/001 Begin:9/l/2002 Frequency: Q I/calendar Q NonComp: 2003 N110100
- - NR/>100
- » NR
- - NR!>10o - -
County. Mecklenburg Region: MRO Subbasin: CTB34 2004 3,100
- - -
- - :-too
- - >100 - -
PF: VAR Special 2005 -
iD/Q%%�s �'00
- - -
- - -
- - .-.
7Q10:0.0 IWC(%)NA Order:D�¢ •MJ 2006
Charlotte -Douglas Airport-002 24hr LC50 ac monit epis [lhd 2002-
� 2003 NR/aloot
NCO083887/002 Begin:9/1/2002 Frequency: 5OWD/A NonComp: 07
N11I33.0t
County: Mecklenburg Region: MRO Subbasin: CTB34 �� ?1(p t ; C t` 2004 2-100
PF: NA Special y� O A 2005
7Q10: NA IWC(°/.)NA OrderU�- = tj�ij2�'; �t �Mlf 2ooa
6
Charlotte -Douglas Airport-003 24hr LC50 ac monit epis flhd 2002
NC0083887/003 B4n:9/l/2002 Frequency.5OWD/A NonComp: 2003 NRh1Wt
NW2-1Wt - -
- -- --•
- - - -- -
County: Mecklenburg Region: MRO Subbasin: CTB34 2004 -
- -
- - -
- - - - NR
PF: NA Special A 2005
22� t./ �i ��s
�� o� .7 rA1 2008
7Q10: NA IWC(°/.)NA f
4
Chemetall Foote Corporation 24hr p/f ac MON1T: 90% fthd 2002 -
- Fag Fag
» Pass-
NCO033570/001 Begin 7/12004 Frequency A NonComp: 2003 -
- - Pass
-- - -
- - - - -
County. Cleveland Region: MRO Subbasin: BRD05 2004 -
- - -
Pass
PF: NA Special 2005 Pass
- - -
-
- - - -
7QIO: 0.9 IWC(-/.) 17 Order- 2006
it Pre 2002 Data Available
LEGEND:
PERM = Permit Requirement LET -Administrative Letter - Target Frequency = Monitoring frequency: Q- Quarterly; M- Monthly; BM- Bimonthly; SA- Semiannually;
A- Annually; OWD- Only when discharging, D- Discontinued monitoring requirement
Begin = First month required 7Q I O = Receiving stream low flow criterion (cfs) + = quarterly monitoring increases to monthly upon failure or NR Months that testing must occur -ex. Jan, Apr, Jul, Oct
PF = Permitted flow IWC°/. = Instream P/F = Pass/Fail =
NonComp z Current Compliance Requirement
(MGD) waste concentration test . AC Acute
Data Notation: f - Fathead Minnow; • - Ceriodaphnia sp.; my - Mysid shrimp; ChV - Chronic value; P - Mortality of stated percentage at
CHR - Chronic
highest concentration; at - Performed by DWQ Aquatic Tox Unit; bt - Bad test
Reporting Notation: - - = Ditto not required; NR - Not reported Facility Activity Status: I - Inactive, N -Newly Issued(To construct); H - Active but not discharging; t-More data available for month in question; - ORC signature needed
7

Facility: Charlotte/Douglas Airport
NPDES#: NCO083887
Receiving Stream: UT Ticer Branch
Comment(s):
Low Flow Record Station Number:
Hydrologic Area Number:
Drainage Area Low Flow Record Station:
Qave Low Flow Record Station:
s7Q10 Low Flow Record Station:
w7Q10 Low Flow Record Station:
30Q2 Low Flow Record Station:
HA10
must be < 400 sq. miles
Drainage Area New Site:
0.00 sq. miles
MAR New Site:
1
Qave per Report Equation:
0 cfs
s7Q10 per Report Equation:
0.00 cfs
w7Q10 per Report Equation:
0.00 cfs
30Q2 per Report Equation:
0.00 cfs
Unuseable Drainage Area
Drainage Area Ratio: #VALUE!
[ new DA / Da at gage #VALUEI
Weighted Ratio: #VALUEI
Over -ride Inappropriate Site ( y ):
Drainage Area New Site: 0.00 miles squared
MAR New Site: 1
Weighted Qave per Report Equation: #VALUEI
Weighted s7Q10 per Report Equation: #VALUEI
Weighted w7Q10 per Report Equation: #VALUEI
Weighted 30Q2 per Report Equation: #VALUEI

December 30, 2004
Charles We#ver
NPDES Unit, -Division of Water Quality
.Department of Environment and Natural Resources
1617 Mail Service Center
Raleigh, NC 27669-1617
Subject: NPDES Permit Renewal Application
Permit No. NCO083887
Charlotte/ Douglas International Airport
Mecklenburg County
Dear Mr. Weaver:
Charlotte/Douglas International Airport (CLT) is submitting the enclosed Short Form C for renewal
of the subject NPDES permit. The NPDES permit expires on June 30, 2005, and the permit renewal
application must be postmarked by December 31, 2004, as stated in your letter to CLT dated
September 9, 2004.
Outfalls
CLT is currently permitted to discharge used deicing fluid, storm water and washwater through
several outfalls. CLT is currently required to monitor storm water discharges from three outfalls as
well as at a surface water location upstream of the facility.
Outfall 001 contains runoff from the north side of the CLT facility including the jet fuel tank farm.
Stormwater from the jet fuel tank farm is treated through an oil/water: separator and discharged into
a retention pond. Additionally, as further described in Appendix A of this application, CLT is
installing a filter system that pond effluent will pass through before discharging through outfall 001.
This system has been designed by an environmental consulting firm and will address CLrs sporadic
limit exceedances of Toluene, Oil and Grease, and Total Suspended Solids. The retention pond is
used as a means of secondary containment in the event of a spill at the tank farm and has a gate valve
that must be manually opened to discharge storm water through the filter systemand then outfall
001. Therefore, storm water is discharged at Outfall 001 throughout the year and may or may not
coincide with a storm event. Discharge flow is estimated based on the area and the -drop in depth of
the retention pond. Since the discharge does not correspond with a rainfall event, total rainfall and
storm duration will not be reported on the Discharge Monitoring Report. Outfall 001 discharges into
Ticer Creek.

Mr. Charles Weaver
Page 2
March 2, 2001
Outfall 002 is an instream monitoring point in Coffey Creek. Outfall 002 includes storm water runoff
from the majority of the runway and tenant areas at CLT. CLT requests it be relocated per this
application as indicated in Appendix B.
Outfall 003 contains storm water runoff from the southeastern side of the CLT facility and contains a
small portion of runway area and a few tenants. Storm water at Outfall 003 is directed through a
retention pond prior to overflowing to Taggart Creek. The North Carolina Air National Guard
located on CLT property also discharges into Taggart Creek under a separate NPDES permit.
CLT is also required to monitor Coffey Creek at a point upstream of the facility, which is designated
as Outfall 004.
Facility Changes
CLT will continue to discharge used deicing fluid, storm water and washwater. New tenants have
been added at CLT since the 2001 NPDES permit application submittal. The operations for these new
tenants are comparable to the existing tenants.
Construction for a new fourth runway is planned to begin in late 2005 or early 2006. Likely, a few
tenants will be added, and a tenant may be relocated. Runoff from this facility expansion will likely
,ow� discharge into Coffey Creek upstream of the requested 002 relocation point indicated in Appendix B
of this application. After plans for the expansion are finalized, CLT will submit a short form permit
application with these plans so that an updated permit can be issued.
Monitoring Data
The NPDES permit requires that one year of monitoring data be submitted with the permit renewal
application. Tables 1 through 4 present the monitoring data for Outfalls 001, 002, 003, and 004,
respectively.
Several tenants at CLT use glycol. Estimated glycol usage for 2004 is presented in Table 5.

eub1
/004,
Mr. Charles Weaver
Page 3
March 2, 2001
TABLE 1
Discharge Monitoring Report Data for Outfall 001
Date
Average
Effluent
Flow
MGD
Oil &
Grease
mg/I
TSS
mg/I
Toluene
ug/l
PH
S.U.
Acute
Toxicity
Ethylbenzene
ug/I
Benzene
ug/I
Xylene
ug/I
Permit Limit
---------
45
45
11
6 < x < 9
---------
---------
---------
___
Jan-04
.21
6
35
82
7.1
Passed
17
19
170
Feb-04
.58
NR
Mar-04*
.34
11 & 33
11 & 27
40 & 97
7.1 & 7
NR
27 & 54
8.5 & 21
200 & 400
Apr-04
.41
<5
23
76
6.9
Passed
9.9
18
220
May-04
.31
8
58
.53
8.7
NR
1.2
0.89
17
Jun-04
.426
17
16
<1
5.9
NR
1.8
<1
8.9
Jul-04
.276
<5
20
4.2
7.1
Passed
1.4
1.1
12
Aug-04
.423
<5
21
53
7.5
NR
17
33
150
Sep-04
.42
<5
7
<1
6.9
NR
<1
<1
5.4
Oct-04
.41
<5
14
<1
6.99
Passed
<1
<1
<3
Nov-04
.42
<5
12
<1
7.24 & 7.38
NR
<1
<1
<3
Dec-03
<5
6
28
6.4
NR
<1
3
220
Notes:
* - Error resulted in samples being pulled on 3-1-04 instead of in February 2004
NR - Not Required

r►,
Mr. Charles Weaver
Page 4
March 2, 2001
TABLE 2
Discharge Monitoring Report Data for Outfall 002
Date
Average
Oil &
TSS
MBAS
Propylene
NH3-N
PH
Effluent
Grease
Glycol
Flow
mg/I
mg/I
mg/l
mg/I
S.U.
MGD
mg/I
Permit Limit
--------
45
---
---------
--------
--
6 < x < 9
Jan-04
5.6
<5
7
0.2
6740
.1 &.9
5.8'
Sept-04`
35.07
<5
25
<0.2
NR
NR
4.9 `
Nov-04
<5
12
<0.1
NR
NR
7.08
Suspect pH was read incorrectly by the Laboratory Technician.
- Second Quarter sample not collected by Laboratory personnel.
Samples collected in January,
September,
and November.
` - Rainfall not recorded for this event therefore the flow could not be calculated.
NR — Not Required
As a result of above, a licensed wastewater treatment plant operator now collects all stormwater samples for
CLT.
TABLE 3
Discharge Monitoring Report Data for Outfall 003
Date
Average
Oil &
TSS
MBAS
Propylene
NH3-N
pH
Effluent
Grease
Glycol
Flow
mg/I
mgll
mgll
mgll
S.U.
MGD
mg/l
Permit Limit
---------
45
---------
---------
---------
---------
6 < x < 9
Jan-04
0.69
<5
14
0.2
62.1
0.2
6.3
Jun-04
0.29
<5
74
<0.2
NR
NR
6.7
Sept-04
4.33
<5
25
<0.2
NR
NR
3.1`
Oct-04"
0.18
<5
4.8
<0.1
NR
NR
6.72
Suspected Laboratory technician error. CLT has contracted a licensed wastewater treatment plant operator to
collect its stormwater samples as a result or repeated technician sampling problems. The operator observed the
technician collected the pH in an incorrect manner that probably led to results that are believed to be inaccurate.
- Since contracting the aforementioned wastewater operator, CLT is having its quarterly required samples pulled
in the first month of each quarter rather than the last month of each quarter.
NR — Not Required

Mr. Charles Weaver
Page 5
March 2, 2001
TABLE 4
Discharge Monitoring Report Data for Outfall 004
Date
Average
Oil &
TSS
MBAS
Glycol
NH3-N
pH
Effluent
Grease
Flow
mg/I
mg/I
mg/I
mg/I
mg/l
S.U.
MGD
Jan-04
NR
<5
4
<0.1
*
<0.1
6.5
Jun-04
NR
<5
9
0.1
NR
NR
6.8
Sept-04
NR
<5
46
<0.2
NR
NR
5.2**
Oct-04
NR
<5
31
0.1
NR
NR
6.69
* - Laboratory error — hold time expiration — resulted in no reportable test result
** - Suspected laboratory technician error in collecting pH results. Suspect this
result is low. This is the
background measuring point for CLT, upstream of our facility. Suspect similar errors with other values
that were out of range.
NR -Not Required
TABLE 5
Estimated Glycol Usage for 2003/2004
Deicing Season
Month
Gallons of Propylene
Glycol Used
Type I
Type IV
Jan-04
83999
15135
Feb-04
57625
10068
Mar-04
10443
0
Oct-03
20885
20137
Nov-03 ,
10443
10068
Dec-03
5221
5034
Total
188615
60443

Mr. Charles Weaver
r1"1 Page 6
March 2, 2001
Recommended Permit Changes
CLT is recommending that no changes be made to its current permit limits. CLT is installing a
filter system to address its 001 Qutfall problems A A""�
Sludge Management Plan
Currently, CLT does not generate solids; therefore, a sludge management plan is not being
submitted.
Primary Industry PPA
Airports are not classified as a Primary Industry according to 40 CFR Subpart 122, Appendix
A. Therefore, a priority pollutant analysis (PPA) is not being submitted.
If you have any questions or require additional information, please contact Brian J. Hennessey,
P.E. of my staff at [phone].
Sincerely,
Charlotte/ Douglas International Airport
j".o,1
jr
Avi ti n Director
D:\cdia\environmental\compliance\npdes\renewals\2004renewal\Let Permit appl cover_.doc
cc: Brian Hennessey/ CLT

CITY OF CHARLOTTE
DATE: 12-30-04
TO: NCDENR
File
SUBJECT: Relocation of Outfall 002
The following is a brief summary of the request.
FROM: Brian J. Hennessey, P.E.
Environmental Affairs Manager
1. Access to Outfall 002 is difficult. During CLT's annual stormwater inspection the Inspector
made a request that access be improved. CLT is happy to do so but thinks relocating it slightly
will assist in this endeavor.
2. The attached map indicates CLT's desired location of 002.
3. In choosing this location, CLT is anticipating some of the drainage from its soon -to -be -built new
runway will drain through the unnamed tributaries into Coffee Creek, upstream of the requested
new 002 site.
4. The access that can be provided to this site will be greatly improved over the current site.
CLT appreciates the consideration given to this request. Should you have any questions about this
request, please let us know.
D:\cdia\environmental\compliance\npdes\renewals\appendixbmemo.doc

C
December 8, 2004
NC DENR
Division of Water Quality, NPDES Permitting
1617 Mail Service Center
Raleigh, NC 277699-1617
Attention: David Goodrich
Division of Water Quality
Re: Notice of Stormwater Discharge Modification
NPDES Permit #NC0083887, Outfall 001
Charlotte Douglas International Airport Fuel Farm
H&H Job No. CDA-017
Dear David:
tijkrl & Hickman
2923 South -I ryon Street
Suite 100 Charlotte, NC
28203-5449
704-586-0007 phone
704-586-0373 fax
_ __ ..nryWu-.hatthiilulL'u1,CUm
_.e, ........ .
DEC 1 0 2004
DENR - WATER QUALITY
POINT SOURCE BRANCH C
i
Hart & Hiclanan, PC (H&H) is submitting this notice on behalf of the Charlotte Douglas
International Airport to advise that a stormwater treatment system design is being completed to
improve the discharge quality from the fuel farm stormwater detention pond. The modifications
described in this submittal are proposed to more reliably meet the permitted organic compound
discharge concentrations at Outfall 001.
In accordance with the referenced permit, stormwater currently accumulates in a lined
stormwater detention pond and is periodically discharged through a manually operated valve in
an existing concrete wet well. Water exits the wet well via a 15" corrugated metal pipe (CMP)
and discharges to an unnamed tributary.
The proposed modification to treat the stormwater discharge includes the following components
(refer also to the attached drawings):
• The 15" CMP outlet in the existing wet well will be closed to allow the wet well to
serve as a sump. The water level in the wet well will rise at the same rate the pond
water level rises. Pump on/pump off level switches will be installed in the wet well
to automatically control a surface mounted centrifugal pump, and a third level switch
will be installed to indicate a high level in the wet well.
• The centrifugal pump will be installed on a concrete pad next to the wet well and will
remove water from the wet well as it rises. The pump discharge will be equipped
with a low flow alarm. The low flow alarm and wet well high level alarm will be
connected to an auto -dialer to advise facility personnel of the alarm conditions.
S:N -Master Proiccu\Charlotte Douglas Into tienal Air n\CDA-017 S W O ign\notice letter.doc

Mr. David Goodrich
December 8, 2004
Page 2
• The pump will discharge to a bag filter to remove solids, then to a flow -totalizing
meter, and will then flow to an organo-clay filter to remove oil and grease.
• The clay filter will discharge to two activated carbon vessels arranged in lead -lag
configuration. The carbon vessel effluent will discharge to the existing 15" CMP,
and the treated stormwater will discharge from the 15" CMP at the same point that it
currently discharges from.
The treatment system flow rate is designed to empty the detention pond within approximately 48
hours after a 10-year storm event, and will require less time for typical, smaller rainfalls. Based
on average hydrocarbon loading and the average annual rainfall for Charlotte, the 1,500 lb clay
filter and 1,000 lb carbon filters are expected to require change -out every 6 to 12 months. The
bag filter will be changed as needed based on the differential pressure across the filter.
The completed design package will be submitted to Mecklenburg County for building permit
review in the coming days. Please contact me if you have questions or suggestions regarding
this proposed modification. If you have no comments, please contact me at your earliest
convenience to confirm we may proceed.
Sincerely,
Hart & Hickman, PC
Bruce Hickman, PE
Principal Engineer
BKH/mlc
Attachments: Dwgs G-100 and M-101
cc: Brian Hennessey — CDIA
S. W -Mara Psajcm\CWolle Douglas Intanaional Aigmn\CDA-I
ID fk-�
.s fO� � —
Co, )i ed rs-,A-u-
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(2)
APPROXIMATE
0 2000 4000
SCALE IN FEET
,m SITE
Ar
0
T[ MOW virU^ U
a
1. SITE LOCATION MAP
DRAWING_ NO. DRAWING TITLE
G-100 SITE LOCATION AND WORK SITE LAYOUT
M-101 P&ID AND SYSTEM LAYOUT
2. WORK SITE LAYOUT
ROAD
m
- Y
NOTES:
1. BASE DRAWINGS PROVIDED BY HDR ENGINEERING, INC. APPROXIMATE
2. SITE TOPOGRAPHY BASED ON SURVEY BY AVIOIMAGE MAPPING 0 50 100 3. POND AREA
SERVICES, INC. CHARLOTTE, NORTH CAROLINA DATED NOVEMBER 26, 2001 SCALE IN FEET
SITE LOCATION AND
WORK SITE LAYOUT
DATE: REv. FIGURE NO,
10-25-04 A G- 1 QQ

AUTODIALER
-----
LOCAL ___________9
------ ONTRO 1 p o6
PANEL
2' HOSE WITH
�----------- �SL�-I PI Fl CAMLOCKS
2' (TYPICAL OF 4)
I I I
III
I r
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P-10 F-101
CENTRIFUGAL PUMP 2 EFFLUENT BAG FILTER 50
--if---
20-30 gpm MICRON, 20-30 gpm
5 HIGH
LEVEL J 4
I ,
I ,
•. PI PI PI
M1 PUMP 8A1
EXISTING ON 2- FNPT n2'FNP-TGATE VALVE1)YFOOT VALVE
EXISTING10' DIP FROMPOND EXI ONOIJTFALLNP2' FNPT 2-
TO
TO BE
PLUGGED
EXISTING WET WELL
NOTES:
OAUTODIALER, PHONETICS, INC. MODEL THE 4100 OR APPROVED EQUAL,
EQUIPPED WITH CELL PHONE DIAL -OUT AND DULL -IN CAPABILITIES AND
ACCESSORIES
O GOULDS GT07 SELF -PRIMING CENTRIFUGAL PUMP, 20 TO 30 GPM AT 90
FT DISCHARGE HEAD MAX.. OR APPROVED EQUAL
O TETRASOLV A-1000 LIQUID PHASE ORGANO-CLAY FILTER. RATED TO 40
PSIG MAX. AT 50 GPM, OR APPROVED EQUAL. FULLY LOADED WITH 1000
LB EC-100 CLAY MEDIA
OTETRASOLV AF-1000 LIQUID PHASE ACTIVATED CARBON FlLTER, RATED TO
40 PSIG MAX. AT 50 GPM, OR APPROVED EQUAL, FULLY LOADED WITH
1000LB VIRGIN CARBON
® INTRINSICALLY SAFE FLOAT -TYPE LEVEL SWITCH (TYPICAL FOR THREE)
©FREESTANDING PAINTED STEEL BAG FILTER RATED TO 50 GPM AND 75
PSIG MIN., WITH (10) /1 SIZE MICRON BAGS SUITABLE FOR
HYDROCARBON EXPOSURE, SWING -BOLT LID. 2- FPT INLET AND OUTLET
OTOTALIZING FLOW METER RATED FOR 50 GPM MAX, NO BRASS, BRONZE
OR COPPER WETTED PARTS
OLOW FLOW SWITCH, DPDT CONTACTS. NO BRASS, BRONZE OR COPPER
WETTED PARTS
ODIFFERENTIAL PRESSURE GAUGE RATED TO 75 PSIG MIN., O TO 20 PSIG
9 RANGE, DWYER OR APPROVED EQUAL, NO BRASS BRONZE OR COPPER
WETTED PARTS
® PRESSURE GAUGE, OIL -FILLED, 3 DIAL FACE, O TO 60 PSIG RANGE, NO
BRASS, BRONZE OR COPPER WETTED PARTS (TYPICAL OF 4)
OGLOBE VALVE WITH TAPERED TRIM, SUITABLE FOR HYDROCARBON
SERVICE, NO BRASS, BRONZE OR COPPER WETTED PARTS
EXISTING LINED
POND _
REV I DATE
CLAY FILTER 1,000 ACTIVATED CARBON ACTIVATEDC BON
lb, 40psig, SOgpm CANISTER SOOIb, CANISTER 5001b,
P&ID MAX 40paig, SOgpm MAX 4Opsig, 50gpm MAX
6110 a B'L z 8'H
OPEN WALL
SHELTER
, /
EL 748
EL 748
1
,
1
16'
6' PERFORATED
DRAIN PIPE
W/GRAVEL COVER
SECTION A -A'
ELEVATION
APPROXIMATE
0
5 10
SCALE IN FEET
NOTE A
CONTRACTOR TO HAND DIG WITHIN 10FT OF COLONIAL
PIPELINE. COLONIAL REPRESENTATIVE (TOMMY LANE
704-506-4896 CELL. 704-392-8610 EXT 18 OFFICE)
MUST BE NOTIFIED 5 DAYS IN ADVANCE AND MUST BE
PRESENT DURING EXCAVATION.
2'a4'
TO 15' CMP TO
DISCHARGE
RETAINING
WALL ---_
�G
�G
� G
— u
CARBON FILTER
DISCHARGE LINE
---.pTO EXISTING 15"
CMP<DISCHARGE
I EGENFI
EXISTING GRADE
G - EXISTING GAS LINE
EXISTING 15"
CMP DISCHARGE
TO CARBON FILTER
DISCHARGE LINE
0 .. , ,. 5 10
SCALE IN FEET
WORK AREA LAYOUT
DESCRIPTION DATE: 10-25-04 PREPARED BY PROJECT TITLE
DESIGNED BY: H&H Hart & Dickman CHARLOTTE DOUGLAS P&ID AND SYSTEM LAYOUT
DRAWN BY: BNR INTERNATIONAL AIRPORT
CHECKED BY: BKH )WA PROFESSIONAL CORPORATION CHARLOTTE, NORTH CAROLINA DATE: REV. FIGURE NO,
2923 S. TRYON STREET SUITE 100 CHARLOTTE, NO ZB203 10-25-04 A M -101
JOB NO. COA-017 704-SS6-013137(P) 704-566-0373(F) WWW.HARTHICKMAN.COM

MEMORANDUM
TO:
FROM:
PREPARED BY:
SUBJECT:
October 26, 2004
Susan Wilson, Acting Supervisor
Western NPDES Program
D. Rex Gleason Q�a
Richard Bridgeman � rs
Charlotte/Douglas International Airport
NPDES Permit No. NC0083887
Mecklenburg County
OCT 2 9 2004
i_
In response to compliance inspections conducted on June 26, 2003 and June 29,
2004, T.J. Orr, CDIA's Aviation Director, has submitted a request (enclosed) for actions
from the DWQ. The current permit (relevant monitoring/limits pages enclosed) requires
"Glycol" monitoring at Outfalls 002 (Main Aircraft Runway Area) and 003 (Southeastern
Runway Area) and Instream Station 004 (Background). The monitoring is required three
times each year for the two Outfalls and annually for Instream Station 004. The
monitoring should be conducted at a defined appropriate time relative to de-icing/anti-
icing chemical use. CDIA had historically monitored for ethylene glycol. Enclosed is a
copy of an e-mail message dated July 30, 2003 from this office to Tom Belnick
concerning appropriate monitoring for "Glycol". It was determined that since CDIA and
its tenants predominantly use propylene glycol, rather than ethylene glycol, that the
analytical monitoring should reflect that; CDIA has since monitored for propylene glycol.
Hopefully, this will be resolved during the next permit renewal process; the permit is
scheduled to expire on June 30, 2005. Unless advised to the contrary, this Office will
reiterate the previous request for CDIA to monitor for propylene glycol during the
coming winter months.
CDIA is also requesting the relocation of the downstream monitoring site
associated with Outfa11002. The permit currently specifies the sampling location to be
100 feet below the double box culvert at the end of New Dixie Road. Because of the
difficulties of access at this site, CDIA proposes to relocate the downstream monitoring
site to the southwest quadrant of the intersection of Piney Top Road. A map indicating
the desired relocation is enclosed. A similar previous request for the relocation of the
sampling site for Instream Station 004 resulted in the issuance of a permit modification
(11/6/03). Again, since the permit renewal process is imminent, this is a matter that can
ultimately be resolved then. In the interim, this Office will give CDIA approval to
relocate the sampling site. Please note on the enclosed map that two unnamed
intermittent streams intersect Coffey Creek between the current and proposed sites.
Should our approval of the relocation not be acceptable, please advise immediately.
Contact either Richard or me should you have questions or comments.

October 22, 2004
Point Source Compliance/Enforcement Unit
North Carolina Department of Environment and Natural Resources
Division of Water Quality
919 North Main Street
Mooresville, North Carolina 28115
RE: Notice of Violation — NPDES Permit No. NCO083887
Dated July 29, 2004
Charlotte Douglas International Airport
Dear Mr. Bridgeman:
This letter is being submitted in response to the subject Notice of Violation. The
response uses the same section headings as the NOV and each section is a
response to the corresponding NOV section. As such, CDIA would like to
respond to the findings of DWQ as follows:
Records/Reports: See Attachments
> The August 2003 DMR was available for the Inspector's review — we were
not told of his trouble locating the report. However, while verifying that we
did have this report it became understandable why the Inspector probably
had trouble locating it — an administrative error resulted in the first page of
the 8/03 DMR not being copied into our records and therefore that page
was not in our records with the balance of the report. Further, the entire
report was filed appropriately with the Central Files. We had the front
page of that report faxed to us from the Central Office and the entire report
is attached to this response.
➢ Propylene Glycol is being sampled in response to our Stormwater
Inspection of June 2003. At that time we were questioned as to w y we
were not testingio�opylene Glycol instead of Ethylene Glycol. Our
permit cover letter dated 7-25-02 indicates that Ethylene Glycol and not
Propylene Glycol is what we were to sample for (see attached letter).
However, in our subsequent response to the 2003 inspection and NOV we
indicated that we would test for Propylene Glycol in lieu of Ethylene
Glycol. Since we did not hear otherwise from DWQ we assumed this was
how we were to proceed. Please clarify which the Airport should be
testing.
Charlotte/Douglas International Airport
P.O. Box 19066 Charlotte, NC 28219 704i359-rCGG

Facility Site Review: See Attachments
> Access to Outfall 002 is difficult due to security fences and requirements
at airports. If DENR could approve relocating this sampling point
downstream — please not the attached sketch showing the proposed
location to the Southwest Quadrant of the intersection of Piney Top Road
and Coffey Creek — CDIA could make access much easier. Further, we
will build steps to the new outfall location.
> Outfall 004 was approved for relocation by DWQ and the letter indicating
such is attached.
Flow Measurement: See Attachments
> The staff gauge for Outfall 001 has been replaced and a picture of such is
attached.
Self -Monitoring Program: See Attachments
Outfall 001
➢ All Non -detectable reporting will be changed to reporting as less than the
detection limit.
➢ Toluene and Oil & Grease limit exceedances should be rectified by the
installation of a carbon absorption unit at outfall 001. The tentative design
and installation schedule is attached.
➢ Monitoring is now performed by a licensed wastewater operator and no
longer done by the laboratory. The laboratory will still conduct the
laboratory testing. This will eliminate missed sampling events such as the
TSS in January 2004 and the "February" samples that were taken on
3/1/04.
➢ The wastewater operator will test the pH prior to release and if not
acceptable we will adjust the pH accordingly.
➢ All amended DMR's are attached as requested.
Outfall 002
➢ Amended DMR's with the flow, rainfall, and event duration are attached.
Outfall 003
➢ Amended DMR's with the flow, rainfall, and event duration are attached.
Outfall 004
➢ Glycol was sampled during this time; however, a laboratory error resulted
in the sample not being tested. A letter from the laboratory is attached.

CDIA will make additional efforts regarding testing being conducted on all
samples taken.
Operations & Maintenance:
> The airport intends to review and update the SWPPP to accommodate the
changes that occur.
Stormwater:
> Training has been conducted since the inspection date. Further, a
videotape of the training was made and is available for tenants to use as
needed. However, as part of updating and complying with our SWPPP,
we will continue to implement new training procedures.
Charlotte/Douglas International Airport looks forward to continuing to work with
NCDENR in managing this process. I ask for your speedy reply to our request to
relocate Outfall 002.
Should you have any questions about this information, please feel free to contact
Brian J. Hennessey at [phone].
Sincerely,
T.. r
Avi ti n Director
CC: Mr. Rusty Rozzelle
NCWQP
700 North Tryon Street, Suite 205
Charlotte, North Carolina 28202
Brian J. Hennessey — CDIA
Elmo Langley — CDIA
D:\cdia\environmental\compliance\npdes\administration\04novresponse.doc

Permit No. NCO083887
A (2). EFFLUENT LINUTATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until e-%-piration. the Permitter is authorized to discharge
stormwater and wastewater from OutfaU 002- Main Aircraft Runway Area (which includes runoff from
the majority of the runway and tenant areas at CDIA, and includes vehicle washing, fuel storage. aircraft fueling.
aircraft maintenance. and de-icing chemical storage/application). Such discharges shall be limited and monitored
by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LBUTATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locations
Flow
2
2
E
Total Rainfall (inches)
2
2
E
Event Duration (minutes)
2
2
E
Total Suspended Solids
Quarterly
Grab
D
Oil and Grease3
45 mg/1
Quarterly
Grab
D
Detergents (MBAS)
Quarterly
Grab
D
pHa
Quarterly
Grab
D
Glycols
3/Year
Grab
D
NH3 as N5
3/Year
Grab
D
Acute Toxicity6
Episodic
Grab
D
Notes:
1. Sample locations: E- Effluent. D- Downstream 100-foot below double box culvert at end of New Dbde Road.
2. For each representative storm sampling event, the total precipitation. storm duration, and total flow must be
monitored. Total flow shall be either: a) measured continuously: b) calculated based on the amount of area
draining to the outfall, the amount of built -upon impervious area, and the total amount of rainfall: or c)
estimated by the measurement of flow at 20-minute intervals during the rainfall event.
3. Where possible, the grab sample shall be skimmed from the surface of a quiescent (calm water) zone.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. Glycol shall be monitored during three discharge events each year at the time of de-icing/anti-icing. or during
the next separate discharge event following de-icing/anti-icing. NH3-N shall be monitored only if urea is used
for de-icing.
6. Acute Toxicity (Fathead Minnow. 24-hour). Refer to Special Condition A(?)- Acute Toxicity Monitoring
(Episodic).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NCOOS3887
N
A (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge
stormwater and washwater from OutfaH 003- Southeastern Runway Area (which includes runoff from
the southeastern side of the CD1A facility containing a small portion of runway area and a few- tenants, and
includes vehicle washing, aircraft washing, aircraft fueling and maintenance. fuel storage, and de-icing chemical
storage/application). Such discharges shall be limited and monitored by the Permittee as specified below*:
EFFLUENT
CHARACTERISTICS
EFFLUENT LINUTATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location,
Flow
2
2
E
Total Rainfall (inches)
2
2
E
Event Duration (minutes)
2
2
E
Total Suspended Solids
Quarterly
Grab
E
Oil and Grease3
45 mg/l
Quarterly
Grab
E
Detergents (MBAS)
Quarterly
Grab
E
pHa
Quarterly
Grab
E
Glycols
3/Year
Grab
E
NH3 as Ns
3/Year
Grab
E
Acute Toxicitys
Episodic
Grab
E
Notes:
1. Sample locations: E- Effluent sample collected after the stormwater retention pond treatment system.
2. For each representative storm sampling event, the total precipitation, storm duration, and total flow must be
monitored. Total flow shall be either: a) measured continuously: b) calculated based on the amount of area
draining to the outfall, the amount of built -upon impervious area, and the total amount of rainfall: or c)
estimated by the measurement of flow at 20-minute intervals during the rainfall event.
3. Where possible, the grab sample shall be skimmed from the surface of a quiescent (calm water) zone.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. Glycol shall be monitored during three discharge events each year at the time of de-icing/anti-icing, or during
the next separate discharge event following de-icing/anti=icing. NH3-N shall be monitored only if urea is used
for de-icing.
6. Acute Toxicity (Fathead Minnow, 24-hour). Refer to Special Condition A(?)- Acute Toxicity Monitoring
(Episodic).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

ti
Permit No. NC0083887 }
A (4). INSTRFisM MONITORING REQUIREMENTS
Beginning on the effective date of this
expiration. the Permittee shall monitor
d permit
(located in Coffey Creek up tream of the CDIA facilitti•), as specified
Instream Station 004- Backgroun
below:
Notes:
1. Sample locations: I- Instream backgroundall be skimmed from the surface IA facility.
2. Where possible, the grab sample shall of a quiescent (calm water) zone.
g/anti-icing. or
g the
3. Glycol shall be monitored annually during a discharge event at the time of
monitored only if urea isr used for
next separate discharge event following de-icing/anti-icing. NH3
-N shall de-icing.

Charlotte/Douglas International Airport (NC0083887)
Subject: Charlotte/Douglas International Airport (NC0083887)
From: Richard Bridgeman <[e-mail]>
Date: Wed, 30 Jul 2003 10:04:08 -0400
To: Tom Belnick <[e-mail]>, Michael Parker <MichaeLParker@ncmaiLnev
Tom, following our telephone conversation concerning why the NPDES permit includes "Glycol"
monitoring for Outfalls 002 and 003, I had the MCWQP staff gather more info on the
deicing/anti-icing solutions used by the airlinestairport. The last Fact Sheet and DMR's indicate that
the reported data is for ethylene glycol. The lab sheets indicate that Method 8015 (???".Y. 7?) is used
to analyze for ethylene glycoL It has been determined that although CDIA encourages the use of
propylene glycol, each of the airlines can choose whatever they want to use for deicing/anti-icing. Last
winter 153,445 gallons of propylene glycol, 985 gallons of ethylene glycol, and 60,350 pounds of urea
were used. That means that 99.36% of the "glycols" used was propylene glycol and only 0.64% was
ethylene glycol. Based on the DMR for 1/03, ethylene glycol concentrations ranged from "Not
Detected" for Outfall 004 (Background) to as high as 484,000 ug/L for Outfall 002. I'm not sure
whether the apparent high concentrations of this very toxic organic are actually significant relative to
water quality, but can you imagine what concentrations would have been reported had they tested for
non -toxic propylene glycol. I would suggest that the next permit require monitoring/reporting based
on the deicing/anti-icing solutions actually used, and that CDIA be discouraged from using ethylene
glycol; in the current permit there is no restriction on how much antifreeze can be discharged into our
surface waters.
Richard Bridgeman - [e-mail]
Environmental Chemist II
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
919 N. Main St.
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
Richard Bridgeman <Richard.Bridgeman(@ncmail.net>
Environmental Chemist II
Div. of Water Quality
NC DENR - Mooresville
1 Of 10/26/2004 10:13 AM

Discharge Point 001
Latitude 35"13'47"
Longitude 80'5657"
Jfffil I - -f r I I
InstreamPomtWl
latitude 35'13'54'
1.a10tude 80156, Igr
Discharge
0,
Longitude 8T59 56" — —
lot
A
Discharge Point UU3 LQ\
latitude 35*120'25"
J.ong:iuide. 80'55'45"
Chariotte/Douglas int. Ai, -Port - NC0083887
Facility
USGS Quad t: n Location
15NW Lai: 35013'47"
Receiving Strearn:Cofiey Creek Long:80056'57"
7i-e- Creek
qf-." Tagger Creek AjOrth] I SCALE 1:24,000
1,05 1�146F— RErLAczfj mpVYE-k

w
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Govemor
November 9, 2004
Mr. T. J. Orr,' Aviation Director
CharlottelDouglas International Airport
P.O. Box 19066
Clzarlotte; NC- 28219
Dear Mr. Orr:
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., DiM.Ctvr«�.
1 � � N 0 d
�D � 4
NOV 1 2 2004 LD
1' DENR - WATER QUALITY.
POINT SOIJRCE_.13RANCH. _`
Subject: Requests - CDIA Response Let eiDated"October 22, 2004:
Charlotte/Douglas International Airport
NPDES Permit No. NC0083887-
Mecklenburg County
This is in response to your letter dated October 22, 2004, which was submitted, in part, in
response to a Compliance Evaluation Inspection Report.
In the referenced letter, you ask for clarification concerning the required monitoring for
"glycol". ' Glycol' is specified, but not defined in the NPDES Permit. In past years, CDIA and
its tenants used ethylene glycol predominantly for deicinglanti-icing. , During the compliance
inspection conducted in June 2003, it was determined that a change to propylene glycol had been
made. Based on information supplied by CDIA, it was determined that during the winter of
2002/2003.>99% ofthe "glycols" used was propylene glycol and <1.0% was ethylene glycol. If
,propylene glycol is used predominantly for the deicing/anti-icing solution this coming winter, it
is requested that the required monitoring reflect that use. This issue should be addressed during
the forthcoming permit renewal process.
have also o requested the relocation of the downstreammonitoring site asses with
O&M 002. There appear to be two unnamed intermittent streams that intersect Coffey Creek
between the current and proposed sites. Neither the MRO staff nor the relevant Raleigh staff
presently has objections to the relocation of the current monitoring site to that proposed by
CDIA. Be afire, however, that this issue will be given further consideration during the permit
renewal process. In the interim, you have the approval of this office to relocate the downstream
monitoring site to the southwest quadrant of the intersection of Piney Top Road, as proposed
MooresvMe Regional Office One 610 East Center Avenue, Suite 301, Mooresville, North Carolina 28115 NofthCarohna
Phone: [phone] / Fax [phone] Internet: h2menr.statextus A7ll fs iyrev /Ar
An Equal Opportunity/AfRrmabe Action Employer— 50°% RecycWl0% Post Consumer Paper

Mr. T. I Orr
CDIA
Page Two
November 9, 2004
Should you have questions or comments, please do not hesitate to contact Richard
Bridgeman or me at 704/663-1699.
Sincerely,
D. Rex Gleason, P.E.
Surface Water Protection Regional Supervisor
Cc: SWP/WestemNPDES Program
Rusty Roaelle, MCWQP
1_:

Charlotte/Douglas International Airport (NC0083887)
, • P
l
Subject: Charlotte/Douglas International Airport (NC0083887)
Date: Wed, 30 Jul 2003 10:03:56 -0400
From: Richard Bridgeman <[e-mail]>
Organization: NC DENR - Mooresville Regional Office
To: Tom Belnick <[e-mail]>,
Michael Parker <[e-mail]>
Tom, following our telephone conversation concerning why the NPDES permit includes "Glycol"
monitoring for Outfalls 002 and 003, I had the MCWQP staff gather more info on the deicing/anti-icing
solutions used by the airlines/airport. The last Fact Sheet and DMR's indicate that thereported data is for
ethylene glycol. The lab sheets indicate that Method 8015 (?????????) is used to analyze for ethylene
glycol. It has been determined that although CDIA encourages the use of propylene glycol, each of the
airlines can choose whatever they want to use for deicing/anti-icing. Last winter 153,445 gallons of
propylene glycol, 985 gallons of ethylene glycol, and 60,350 pounds of urea were used. That means that
99.36% of the "glycols" used was propylene glycol and only 0.64% was ethylene glycol. Based on the
DMR for 1/03, ethylene glycol concentrations ranged from "Not Detected" for Outfall 004 (Background) to
as high as 484,000 ug/L for Outfall 002. I'm not sure whether the apparent high concentrations of this very
toxic organic are actually significant relative to water quality, but can you imagine what concentrations
would have been reported had they tested for non -toxic propylene glycol. I would suggest that the next
permit require monitoring/reporting based on the deicing/anti-icing solutions actually used, and that CDIA
be discouraged from using ethylene glycol; in the current permit there is no restriction on how much
antifreeze can be discharged into our surface waters.
Richard Bridgeman - [e-mail]
Environmental Chemist II
North Carolina Dept. of Environment & Natural Resources
Div. of Water Quality
919 N. Main St.
Mooresville, NC 28115
Ph: [phone] Fax: [phone]
Richard Bridgeman <[e-mail]>
Environmental Chemist II
NC DENR - Mooresville
Div. of Water Quality
I of 1 7/30/03 10:10 AM