NCS000508_PTIA 2005 Final Permit_20050201

NCS000508
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE STORMWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELI GNATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Piedmont Triad Airport Authority
is hereby authorized to discharge stormwater from a facility located at
Piedmont Triad International Airport
Greensboro, NC
Guilford County
to receiving waters designated as Brush Creek, Deep River, Horsepen Creek, and their tributaries
in the Cape Fear River Basin in accordance with the discharge limitations, monitoring
requirements, and other conditions set forth in Parts I,11, III, IV, V and VI hereof.
This permit shall become effective February 1, 2005.
This permit and the authorization to discharge shall expire at midnight on January 31, 2010.
Signed this day January 10, 2005.
Alan Klimek, PE, Director
Division of Water Quality
By the Authority of the Environmental Management Commission

Permit No. NCS000508 '
TABLE OF CONTENTS
PART I INTRODUCTION
Section A: Individual Permit Coverage
Section B: Permitted Activities
Section C: Location Map
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
Section A: Stormwater Pollution Prevention Plan
Section B: Analytical Monitoring Requirements
Section C: Qualitative Monitoring Requirements
Section D: Stormwater MR..nagement Requirements from the Water Quality Certification
Section E: Minimization. of De-icing Materials in Stormwater
PART III STANDARD CONDITIONS
Section A: Compliance and Liability
1.
Compliance Schedule
2.
Duty to Comply
3.
Duty to Mitigate
4.
Civil and Criminal Liability
5.
Oil and Hazardous Substance Liability
6.
Property Rights
7.
Severability
8.
Duty to Provide Information
9.
Penalties for Tampering
10.
Penalties for Falsification of Reports
Section B: General Conditions
1.
Individual Permit Expiration
1
i

Permit No. NCS000508
2. Transfers
3. Signatory Requirements
4. Individual Permit Modification, Revocation and Reissuance, or
Termination
5. Permit Actions
Section C: Operation and Maintenance of Pollution Controls
1. Proper Operation and Maintenance
2. Need to Halt or Reduce Not a Defense
3. Bypassing of Stormwater Control Facilities
Section D: Monitoring and Records
L
Representative Sampling
2.
Recording Results
3.
Flow Measurements
4.
Test Procedures
5.
Representative Outfall
6.
Records Retention
7.
Inspection and Entry
Section E: Reporting Requirements
1.
Discharge Monitoring Reports
2.
Submitting Reports
3.
Availability of Reports
4.
Non-StormwaterDischarges
5.
Planned Changes
6.
Anticipated Noncompliance
7.
Bypass
8.
Twenty-four Hour Reporting
9.
Other Noncompliance
10.
Other Information
PART IV LIMITATIONS REOPENER
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS
ii

Permit No. NCS000508
PART VI DEFINITIONS
SUPPLEMENT TO MONITORING, CONTROLS AND LIMITATIONS FOR PERMITTED
DISCHARGES
iii

Permit No. NCS000508
PART I INTRODUCTION
SECTION A: INDIVIDUAL PERMIT COVERAGE
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee and the co-permittees listed on the following page are authorized to discharge
stormwater associated with industrial activity. Such discharges shall be controlled, limited, and
monitored as specified in this permit. Discharges covered in this permit are the stormwater
discharges from the current airport operations (001 through 031) as well as additional stormwater
discharge points that may be created by further modification or expansion of airport operations.
(current discharges 001, 002, 003, 004, 005, 006, 007, 008, 009, 010, 011, and 012 discharge to
Horsepen Creek and it's tributaries; current discharges 013, 014, 015, 016, 016a, 017, 018, and
019 discharge to tributaries to Deep River; current discharges 020, 021, 022, 023, 024, 025, 026,
027, 028, 029, 030, and 031 discharge to Brush Creek; all depicted on the map in Section C.)
SECTION B: PERMITTED ACTIVITIES
Until this permit expires or is modified or revoked, the permittee and the co-permittees are
authorized to discharge stormwater to the surface waters of North Carolina or separate storm
sewer system that has been adequately treated and managed in accordance with the terms and
conditions of this individual permit. All discharges shall be in accordance with the conditions of
this permit.
Any other point source discharge to surface waters of the state is prohibited unless it is an
allowable non-stormwater discharge or is covered by another permit, authorization, or approval.
This permit does not relieve the permittee from responsibility for compliance with any other
applicable federal, state, or local law, rule, standard, ordinance, order, judgment, or decree.
The discharges allowed by this permit shall not cause or contribute to a violation of water quality
standards.
After receiving notice that the permittee is named as a significant contributor of the pollutant of
concern in an approved TMDL, the permittee shall amend the Stormwater Pollution Prevention
Plan to address any conditions or requirements included in the TMDL that are applicable to the
permittee's discharge, within the time frame specified in the TMDL. If the TMDL establishes a
specific numeric wasteload allocation that applies to the permittee's discharges, then the
permittee must implement all necessary measures to meet that allocation, within the time frame
specified in the TMDL. If no time frame is specified, the DWQ regional office will establish a
time frame sufficient to insure the permittee's timely progress.
Part I Page 1 of 3

Permit No. NCS000508
Co-Permittees
Airborne Express, Inc.
Airtran Airways, Inc.
American Eagle Airlines, Inc.
Atlantic Aero, Inc.
Avis Rent A Car Systems, Inc.
Bill Davis Racing, Inc.
Budget Rent-A-Car Systems, Inc.
Cessna Aircraft Company
Champion Cartage, Inc.
Continental Airlines, Inc.
Dasher Express, Inc.
Delta Air Lines, Inc.
Enterprise Leasing Company - Southeast
Federal Express Corporation
Gearbuck Aviation Services, Ltd.
Guilford Technical Community College
Independence Air, Inc.
Jefferson -Pilot Corporation
Jetstream Ground Services, Inc.
Menlo Worldwide Forwarding, Inc.
Northwest Airlines, Inc.
Piedmont Aviation Services, Inc.
Tradewinds Airlines, Inc.
Triad International Maintenance Corporation
United Air Lines, Inc.
United Parcel Service, Inc.
United States Postal Service
US Airways, Inc.
Worldwide Flight Services, Inc.
Part I Page 2 of 3

Permit No. NCS000508
Note: Figure obtained from United States Geologic Survey (USGS) 7.5 Minute Topographic Map for Guilford County, North Carolina.
Legend
Outfall Location
Outfall Latitude
Longitud
Outfal] Latitude
Longitude Outfall Latitude
Longitude
001
002
36'06'45"
36'06'45"
79'55'00"
013
36'05'00"
79055'15"
024
36'06'15"
7905530"
River Basin: Cape Fear River Basin
003
36006'30"
79'55'00"
014
36005'15"
79155'30"
D25
36006'30"
79'55'30"
Receiving Stream: Brush Creek
79'55'15"
015
36*0615"
79055'30"
026
36'06'30"
79055'15"
004
36-06'15"
79055'15"
016
36'05'15"
79'55145"
027
36006'30"
79'55'15"
Horsepen Creek
005
36006'00"
79055'45"
016A
36'05'30"
79*55,001,
029
3600645"
79'55100"
Deep River
006
36'0545"
79055'45"
017
36105'30"
79'55'00"
029
36006'45"
79055'00"
Stream Class: Class WS-III
007
36005'30"
79'551Od'
018
36005'30"
79'55'00"
030
36*06,45"
79055'00"
008
36105'15"
79'55'00"
019
3600545"
79,55,151,
031
36006'00"
79055'40"
009
36'05'l5"
79055'00"
020
36006'00"
79'55'00"
Outfall Locations
010 36005'00" 79'55'45" 021 36'OVW' 79'55'45"
O11
36004'00"
79055'45"
022
36106'00"
79,55,451,
Piedmont Triad Airport
012
36004'00"
79'55'45"
023
36'06'00"
7755'45"
Guilford County

Permit No. NCS000508
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR
PERMITTED DISCHARGES
SECTION A: STORMWATER POLLUTION PREVENTION PLAN
The permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to as
the Plan. This Plan shall be considered public information in accordance with Part III, Standard
Conditions, Section E, Paragraph 3 of this individual permit. The Plan shall include, at a
minimum, the following items:
Site Plan. The site plan shall provide a description of the physical facility and the
potential pollutant sources that may be expected to contribute to contamination of
stormwater discharges. The site plan shall contain the following:
(a) 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, the name of the receiving water(s) to which the
stormwater outfall(s) discharges, or 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.
(b) A narrative description of storage practices, loading and unloading activities,
outdoor process areas, dust or particulate generating or control processes, and
waste disposal practices.
(c) A site map 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, existing
BMPs and impervious surfaces, and the percentage of each drainage area that is
impervious. For each outfall, a narrative description of the potential pollutants that
could be expected to be present in the stormwater discharge.
(d) A list of significant spills or leaks of pollutants that have occurred at the facility
during the three previous years and any corrective actions taken to mitigate spill
impacts.
(e) Certification that the stormwater outfalls have been evaluated for the presence of
non-stormwater discharges. The certification statement will be signed in
accordance with the requirements found in Part III, Standard Conditions, Section
B, Paragraph 3.
2. Stormwater Management Plan. The stormwater management plan shall contain a
narrative description of the materials management practices employed which control or
minimize the exposure of significant materials to stormwater, including structural and
Part II Page 1 of 15

Permit No. NCS000509
nonstructural measures. The stormwater management plan, at a minimum, shall
incorporate the following:
(a) Feasibility Study. A review of 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 practical, the permittee shall
prevent exposure of all storage areas, material handling operations, and
manufacturing or fueling operations. In areas where elimination of exposure is
not practical, the stormwater management plan shall document the feasibility of
diverting the stormwater runoff away from areas of potential contamination.
(b) Secondary Containment Schedule. 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 substances to prevent leaks and spills from
contaminating stortrrwater 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 for color, foam, outfall
staining, visible sheens, and dry weather flow, prior to release of the accumulated
stormwater. Accumulated stormwater shall be released if found to be
uncontaminated by the material stored within the containment area. 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.
(c) BMP Summary. A narrative description shall be provided 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 to contribute significant quantities
of pollutants to stormwater discharges and data collected through monitoring of
stormwater discharges.
Spill Prevention and Response Plan. The Spill Prevention and Response Plan (SPRP)
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. 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 SPCC with the SPRP may be incorporated by reference into the SPRP.
4. Preventative Maintenance and Good Housekeeping Program. A preventative
maintenance program shall be developed and implemented. The program shall document
schedules of inspections and maintenance activities of stormwater control systems, plant
Part II Page 2 of 15

Permit No. NCS000508
equipment and systems. Inspection of material handling areas and regular cleaning
schedules of these areas shall be incorporated into the program.
5. Employee Training. Training schedules shall be developed and training provided at a
minimum on an annual basis on stormwater protection principles, proper spill response
and cleanup procedures, and preventative maintenance activities for all personnel
involved in any of the facility's operations that have the potential to contaminate
stormwater runoff. Facility personnel (or team) responsible for implementing the training
shall be identified.
6. Responsible Party. The Stormwater Pollution Prevention Plan shall identify the specific
position(s) or person(s) responsible for the overall coordination, development,
implementation, and revision to the Plan. Responsibilities for all components of the Plan
shall be documented and position assignments provided.
7.. Plan Amendment. The pemtittee shall amend the Plan whenever there is a change in
design, construction, operation, or maintenance that has a significant effect on the
potential for the discharge of pollutants to surface waters. The Stormwater Pollution
Prevention Plan shall be reviewed and updated on an annual basis.
The Director may notify the permittee when the Plan does not meet one or more of the
minimum requirements of the permit. Within 30 days of such notice, the permittee shall
submit a time schedule to the Director for modifying the Plan to meet minimum
requirements. The permittee shall provide certification in writing (in accordance with
Part III, Standard Conditions, Section B, Paragraph 3) to the Director that the changes
have begin made.
8. Facility Inspection Program. Facilities are required to inspect all stormwater systems on
at least a quarterly schedule, once in the periods of January —March; April — June; July —
September; and October — December. In the January — March period the inspection shall
be performed when de-icing/anti-icing is occurring, when possible. The inspection and
any subsequent maintenance activities performed shall be documented, recording date
and time of inspection, individual(s) making the inspection, and a narrative description of
the facility's stormwater control systems, plant equipment, and systems. Records of these
inspections shall be incorporated into the Stormwater Pollution Prevention Plan.
Stormwater discharge characteristic monitoring as required in Part II of this permit shall
be performed in addition to facility inspections.
9. Implementation. The permittee shall document all monitoring, measurements,
inspections, maintenance activities, and training provided to employees, a log of the
sampling data, and a record of actions taken to implement BMPs associated with the
industrial activities, including the vehicle maintenance activities. Such documentation
shall be kept on -site for a period of five years and made available to the Director or his
authorized representative immediately upon request.
Part II Page 3 of 15

Permit No. NCS000508
SECTION B: ANALYTICAL MONITORING REQUIREMENTS
(1). Outfalls 024 and 026 are to be monitored as representative of Outfalls 001, 002, 016a, 024,
025, and 026. During the period beginning on the effective date of the permit and lasting until
expiration, the penmittee is authorized to discharge stormwater subject to the provisions of this
permit. Analytical monitoring of stormwater discharges shall be performed as specified below in
Table 1.
All analytical monitoring shall be performed during a representative storm event. The permittee
shall complete the analytical samplings in accordance with the schedule specified below in Table
10.
Table 1. Analvical Monitorino Wmtirpmonrc
Discharge
-,-
Measurement Frequency
Sample
Sa*..ple
Characteristics
inns
Type
Location
BOD
m /l
Quarterly
Grab
024 and 026
Total suspended solids
m9Jl
Quarterly
Grab
024 and 026
Total rainfall
inches
Quarterly
Event duration
minutes
Quarterly
Total flow
MG
Quarterly
-
024 and 026
Footnote
For each sampled representative storm 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.
Part II Page 4 of 15

Permit No. NCS000508
(2). Outfall 004 is to be monitored as representative of Outfalls 003, 004, 005, 008, 013, 017,
018, 019 and 020. During the period beginning on the effective date of the permit and lasting
until expiration, the permittee is authorized to discharge stormwater subject to the provisions of
this permit. Analytical monitoring of stormwater discharges shall be performed as specified
below in Table 2.
All analytical monitoring shall be performed during a representative storm event. The permittee
shall complete the analytical samplings in accordance with the schedule specified below in Table
10.
Table 2. Analytical Monitoring Requirements
Discharge
Characteristics
Units
Measurement Frequency
Sample
Type
Sample
Location
BOD
mg/1
Quarterly
Grab
004
Total suspended solids
m /l
Quarterly
Grab
004
Ammonia nitrogen
MR/1
Quarterly
Grab
004
Total rainfall
inches
Quarterly
Event duration
minutes
Quarterly
Total flow
MG
Quarterly
_
004
Footnote:
For each sampled representative storm 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.
Part II Page 5 of 15

Permit No. NCS000508
(3). Outfall 006 is to be monitored as representative of Outfalls 006, 007 and 016. During the
period beginning on the effective date of the permit and lasting until expiration, the permittee is
authorized to discharge stormwater subject to the provisions of this permit. Analytical
monitoring of stormwater discharges shall be performed as specified below in Table 3.
All analytical monitoring shall be performed during a representative storm event. The permittee
shall complete the analytical samplings in accordance with the schedule specified below in Table
10.
Table 3. Analytical Monitoring Requirements
Discharge
Measurement
Characteristics
Units
Frequency
Sample
Sample
Type
Location
BOD
m l
Quarterly
Grab
006
Total suspended solids
In
Quarterly
Grab
006
Ammonia nitrogen
in 1
Quarterly
Grab
006
Total rainfall
inches
Quarterly
Event duration
minutes
Quarterly
Total flow
MG
Quarterly
-
006
Footnote:
For each sampled representative storm 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.
Part II Page 6 of 15

Permit No. NCS000508
(4). Outfall 027 is to be monitored as representative of Outfalls 027 and 028. During the period
beginning on the effective date of the permit and lasting until expiration, the permittee is
authorized to discharge stormwater subject to the provisions of this permit. Analytical
monitoring of stormwater discharges shall be performed as specified below in Table 4.
All analytical monitoring shall be performed during a representative storm event. The pernuttee
shall complete the analytical samplings in accordance with the schedule specified below in Table
10.
Table 4. Analvtical Monitoring RannirPmantc
Discharge
Characteristics
Units
Measurement Frequency
Sample
'Type
Sample
Location
BOD
m /l
Quarterly
Grab
027
Total suspended solids
mg/1
Quarterly
Grab
027
Ammonia nitrogen
m
Quarterly
Grab
027
Total rainfall
inches
Quarterly
Event duration
minutes
Quarterly
Total flow
MG
Quarterly
-
027
Footnote:
For each sampled representative storm 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.
Part II Page 7 of.15

Permit No. NCS000508
(5). Outfall 030 is to be monitored as representative of Outfalls 029, 030 and 031. During the
period beginning on the effective date of the permit and lasting until expiration, the permittee is
authorized to discharge stormwater subject to the provisions of this permit. Analytical
monitoring of stormwater discharges shall be performed as specified below in Table 5.
All analytical monitoring shall be performed during a representative storm event. The permittee
shall complete the analytical samplings in accordance with the schedule specified below in Table
10.
Table 5. Analvtical Monitnrina
Discharge
Measurement Frequency
Sample
Sample
Characteristics
Units
Type
Location
BOD
m /l
Quarterly
Grab
030
Total suspended solids
MgA
Quarterly
Grab
030
Ammonia nitrogen
m
Quarterly
Grab
030
Total rainfall
inches
Quarterly
Event duration
minutes
Quarterly
Total flow
MG
Quarterly
-
030
Footnote:
For each sampled representative storm 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.
Part II Page 8 of 15

Permit No. NCS000508
(6). Outfall 014 is to be monitored as representative of Outfalls 009, 010, 011, 612, 014, 015,
021, 022, and 023. During the period beginning on the effective date of the permit and lasting
until expiration, the permittee is authorized to discharge stormwater subject to the provisions of
this permit. Analytical monitoring of stormwater discharges shall be performed as specified
below in Table 6.
All analytical monitoring shall be performed during a representative storm event. The permittee
shall complete the analytical, samplings in accordance with the schedule specified below in Table
10.
Table 6. Analytical Monitoring Re uirement
Discharge
q s
Measurement Frequency
Sample
Sample
Characteristics
Units
Type
Location
BOD
m /l
Quarterly
Grab
014
Total suspended solids
m 1
Quarterly
Grab
014
Ammonia nitro en
m
Quarterly
Grab
014
Total rainfall
inches
Quarterly
Event duration
minutes
Quarterly
Total flow
MG
Quarterly
-
014
Footnote:
For each sampled representative storm 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.
Part 11 Page 9 of 15

Permit No. NCS000508
(7). Stream analytical monitoring shall be conducted in the receiving streams at locations which
are downstream and upstream (if an upstream exists) of the stormwater discharges from the
pernuttee's activities. The specific locations of the sampling points shall be approved by the
Division's regional office. At a minimum, there shall be sampling for each of the three receiving
waters (Brush Creek, Horsepen Creek, and tributaries to Deep River). The stream analytical
monitoring shall be performed as specified below in Table 7.
All analytical monitoring shall be performed during a representative storm event. The permittee
shall complete the analytical sampling events in accordance with the schedule specified below in
Table 10.
Table 7. Stream Analvtical Monitorinp Ren,iirPmPnfc
Parameter
Units
!Measurement Frequency
Sample
Sample
Type
Location
Dissolved oxygen
mgll
Quarterly
Grab
Downstream and
Upstream
Turbidity
NTU
Quarterly
Grab
Downstream and
Upstream
pH
units
Quarterly
Grab
Downstream and
Upstream
Conductivity
mhos
Quarterly
Grab
Downstream and
Upstream
Footnote:
Downstream and upstream (if an upstream exists) of the stormwater discharges from the pennittee's activities.
Part II Page 10 of 15

Permit No. NCS000508
(8). The permittee shall monitor and sample each representative outfall for every de-icing/anti-
icin.; event. 'Each monitoring event shall be conducted during a discharge event at the time of the
de-icing/anti-icing event, or during the next separate discharge event following the de-icing/anti-
icing event if insufficient discharge is available during the de-icing/anti-icing event. The
analytical monitoring shall be performed as specified below in Table 8.
Table 8. De-icing/Anti-icing Event Analytical Monitoring Requirements for
Reuresentative nntfallc
Discharge
Units
Measurement Frequency
Sample
Sample
Characteristics
Type
Location
Ethylene glycol
mg/L,
Every de-icing/anti-icing event .
Grab
Each representative
outfall
Propylene glycol
mg/L
Every de-icing/anu-icing event
Grab
Each representative
outfall
Acute toxicity
Every de-icing/anti-icing event
Grab
Each representative
outfall
Total precipitation
inches of
Every de-icinglanti-icing event
rain
Event duration
minutes
Every de-icing(anti-icing event
Total flow
MG
Every de-icinglanti-icing event
Each representative
outfall
Footnote: Acute toxicity testing shall be as required by this permit section, SUPPLEMENT TO MONITORING,
CONTROLS AND LIMITATIONS FOR PERMITTED DISCHARGES SPECIAL CONDITIONS, A(9) ACUTE
TOXICITY MONITORING — Episodic.
Part II Page 11 of 15

Permit No. NCS000508
(9). The permittee shall perform in -stream sampling for every de-icing/anti-icing event. The
sampling locations will be the same as those approved by DWQ for the PTAA stormwater
management plan for de-icing agents required by Condition of Certification 10 of Water Quality
Certification 3428. Each monitoring event shall be conducted during a discharge event at the .
time of the de-icing/anti-icing event, or during the next separate discharge event following the
de-icing/anti-icing event if insufficient discharge is available during the de-icing/anti-icing event.
The analytical monitoring shall be performed as specified below in Table 9.
Table 9. De-icing(Anti-icing Event Analytical Monitoring Requirements for In -stream
Sampling
Parameter
Units
. Measurement Frequency
Sample
Sample
Type
Location
Acute toxicity
Every de-icing/anti-icing event
tab
As per DWQ
a roval
B OD5
m �
Every de-icing/anti-icing event
ab
As per DWQ
a roval
Total precipitation
inches of
Every de-icing/anti-icing event
rain
Event duration minutes
Every de-icmg/anti-icing event
Footnote: Acute toxicity testing shall be as required by this permit section, SUPPLEMENT TO MONITORING,
CONTROLS AND LIMITATIONS FOR PERMITTED DISCHARGES SPECIAL CONDITIONS, A(9) ACUTE
TOXICITY MONITORING — Episodic
Part II Page 12 of 15

Permit No. NCS000508
(10). The monitoring schedule provided in Table 10 below applies to all the required analytical
monitoring activities other than those required in (8) and (9) above.
Table 10. Monitorinn whPdnla
Monitoring periE
End
quarter1
April 302�
quarter
July 31
3' quarter
October 31
4�quarterr
1
January 31
Part II Page 13 of 15

Permit No. NCSn00508
SECTION C: QUALITATIVE MONITORING REQUIREMENTS
Qualitative monitoring requires a visual inspection of each stormwater outfall regardless of
representative outfall status and shall be performed as specified below in Table 11. Qualitative
monitoring is for the purpose of evaluating the effectiveness of the Stormwater 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.
In the event an atypical condition is noted at a stormwater discharge outfall, the Permittee shall
document the suspected cause of the condition and any actions taken in response to the
discovery. This documentation will be maintained with the Stormwater Pollution Prevention
Plan.
All qualitative monitoring will be performed four times per year, once in the periods of January —
March; April — June; July — September; and October — December. In the January — March period
the qualitative monitoring shall be performed when de-icing/anti-icing is occurring, when
possible.
Table 11. Qualitative Monitoring Requirements
Discharge Characteristics
Frequency
Monitoring
Locationl
Color
Four times per year
SDO
Odor
Four times per year
SDO
Clarity
Four times per year
SDO
Floating Solids
Four times per year
SDO
Suspended Solids
Four times per year
SDO
Foam
Four times per year
SDO
Oil Sheen
Four times per year
SDO
Other obvious indicators
of stormwater ollution
Four times per year
SDO
Footnotes:
1 Monitoring Location: Qualitative monitoring shall be performed at each stormwater discharge outfall (SDO)
regardless of representative outfall status.
Part H Page 14 of 15

Permit No. NCS000508
SECTION D: STORMWATER MANAGEMENT REQUIREMENTS FROM THE
WATER QUALITY CERTIFICATION
In addition to the Stormwater Pollution Prevention Plan and monitoring in this Part, the
conditions of the North Carolina Water Quality Certification, WQC #3428 issued on November
10, 2003, or as that Certification may be amended in the future, which address Stormwater
Management (specifically Conditions of Certification 8, 9, 10 and 11) are incorporated by
reference as binding and enforceable conditions of this Permit. The permittee must implement
the elements of those specific Conditions of Certification which include, in part, and without
limitation to, development and DWQ approval of stormwater management plans, stormwater
cdntfol facilities construction plans and specs, construction and operation of control facilities, the
required release rate flow modeling and DWQ approval, a de-icing stormwater management plan
including means to treat runoff to levels that comply with Surface Water Quality Standards, and
a DWQ-approved evaluation of downstream stream bed and bank stability.
SECTION E: MINIMIZATION OF DE-ICING MATERIALS IN STORMWATER
The permittee shall produce and implement a plan for the minimization of the release of
materials used for de-icing into the stormwater system. This plan shall address, as a minimum:
1. The current use and practices employed at the airport for the control and minimization
of entry of the de-icing materials into the stormwater system;
2. The means that may be practicable for modifying current use and practices to collect
the runoff that occurs during and following the application of the de-icing materials
and
3. A means to treat the pollutants in runoff to levels that comply with Surface Water
Quality Standards.
4. The plan shall include a synthetic liner to protect groundwater for all stornwater
management ponds that may receive de-icinglanti-icing fluids. In lieu of liners, the
permittee may install groundwater monitoring wells down gradient of the ponds. If
the pemuttee chooses to install groundwater monitoring wells, then the permittee
must obtain approval from the Division of Water Quality for the number of wells, the
location of wells, the sampling parameters, and the frequency of sampling.
The plan must include the procedures, design plans and specifications necessary to achieve
compliance with Water Quality Standards and a timetable for the implementation. The plan and
the timetable must be prepared and submitted to the Division within six months of the issuance
of this Permit for approval. The plan must be implemented in accordance with the approved
timetable.
Part H Page 15 of 15

Permit No. NCS000508
PART III STANDARD CONDITIONS
SECTION A: COMPLIANCE AND LIABILITY
1. Compliance Schedule
The permittee shall comply with Limitations and Controls specified for sormwater discharges in
accordance with the following schedule:
Current Activities: The Stormwater Pollution Prevention Plan shall be developed and implemented within
12 months of the effective date of the initial permit and updated thereafter on an annual basis. Secondary
containment as specified in Part II, Section A, Paragraph 2(b) of this permit, shall be accomplished within
12 months of the effective date of the initial permit issuance.
Expansion: The modified Stormwater Pollution Prevention Plan for expansion shall be developed and
implemented prior to the beginning of discharges from the operation of any additional industrial activity and
be updated thereafter on an annual basis. Secondary containment, as specified in Part D, Section A,
Paragraph 2(b) of this permit shall be accomplished prior to the beginning of discharges from the operation
of the expanded industrial activity.
2. Duty to Comply
The permittee must comply with all conditions of this individual permit. Any permit noncompliance
constitutes a violation of the Clean Water Act and is grounds for enforcement action; for permit termination,
revocation and reissuance, or modification; or denial of a permit upon renewal application.
a. The permittee shall comply with standards or prohibitions established under section 307(a) of the
Clean Water Act for toxic pollutants within the time provided in the regulations that establish these
standards or prohibitions, even if the permit has not yet been modified to incorporate the
requirement.
b. The Clean Water Act provides that any person who violates a permit condition is subject to a civil
penalty not to exceed $27,500 per day for each violation. Any person who negligently violates any
permit condition is subject to criminal penalties of $2500 to $25,000 per day of violation, or
imprisonment for not more than 1 year, or both. Any person who knowingly violates permit
conditions is subject to criminal penalties of $5,000 to $50,000 per day of violation, or
imprisonment for not more than 3 years, or both. Also, any person who violates a permit condition
may be assessed an administrative penalty not to exceed $11,000 per violation with the maximum
amount not to exceed $137,500. [Ref: Section 309 of the Federal Act 33 USC 1319 and 40 CFR
122.41(a).]
c. Understate law, a daily civil penalty of not more than twenty-five thousand dollars ($25,000) per
violation may be assessed against any person who violates or fails to act in accordance with the terms,
conditions, or requirements of a permit. [Ref: North Carolina General Statutes 143-215.6A]
d. Any person may be assessed an administrative penalty by the Director for violating section 301, 302,
306, 307, 308, 318, or 405 of the Act, or any permit condition or limitation implementing any of such
sections in a permit issued under section 402 of the Act. Administrative penalties for Class I violations
are not to exceed $11,000 per violation, with the maximum amount of any Class I penalty assessed not
to exceed $27,500. Penalties for Class II violations are not to exceed $11,000 per day for each day
Part III Page 1 of 8

Permit No. NCS000508
during which the violation continues, with the maximum amount of any Class II penalty not to exceed
$137,500.
3. Duty to Mitigate
The permittee shall take all reasonable steps to minimize or prevent any discharge in violation of this
individual permit which has a reasonable likelihood of adversely affecting human health or the environment.
4. Civil and Criminal Liabiliy
Except as provided in Part III, Section C of this permit regarding bypassing of stormwater control facilities,
nothing in this individual permit shall be construed to relieve the permittee from any responsibilities,
liabilities, or penalties for noncompliance pursuant to NCGS 143-215.3,143-215.6A, 143-215.613, 143-215.6C
or Section 309 of the Federal Act, 33 USC 1319. Furthermore, the permittee is responsible for
consequential damages, such as fish kills, even though the responsibility for effective compliance may be
temporarily suspended.
5. Oil and Hazardous Substance Liability
Nothing in this individual permit shall be construed to preclude the institution of any legal action or relieve
the permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject to
under NCGS 143-215.75 et seq. or Section 311 of the Federal Act, 33 USC 1321.
6. PropertyRights
The issuance of this individual permit does not convey any property rights in either real or personal
Property, or any exclusive privileges, nor does it authorize any injury to private property or any invasion of
personal rights, nor any infringement of federal, state, or local laws or regulations.
7. Severability
The provisions of this individual permit are severable, and if any provision of this individual permit, or the
application of any provision of this individual permit to any circumstances, is held invalid, the application of
such provision to other circumstances, and the remainder of this individual permit, shall not be affected
thereby.
8. Duty to Provide Information
The permittee shall furnish to the Director, within a reasonable time, any information which the Director
may request to determine whether cause exists for modifying, revoking and reissuing, or terminating the
permit issued pursuant to this individual permit or to determine compliance with this individual permit. The
permittee shall also furnish to the Director upon request, copies of records required to be.kept by this
individual permit.
9. Penalties for Tampering
The Clean Water Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate,
any monitoring device or method required to be maintained under this individual permit shall, upon
conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more
than icvo years per violation, or by both. If a conviction of a person is for a violation committed after a first
conviction of such person under this paragraph, punishment is a fine of not more that $20,006 per day of
violation, or by imprisonment of not more than 4 years, or both.
Part III Page 2 of 8

Permit No. NCS000508
10. Penalties for Falsification of Reports
The Clean Water Act provides that any person who knowingly makes any false statement, representation, or
certification in any record or other document submitted or required to be maintained under this individual
permit, including monitoring reports or reports of compliance or noncompliance shall, upon conviction, be
punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than two years
per violation, or by both.
SECTION B: GENERAL CONDITIONS
1. Individual Permit Expiration
The permittee is not authorized to discharge after the expiration date. In order to receive automatic
authorization to discharge beyond the expiration date, the permittee shall submit forms and fees as are
required by the agency authorized to issue permits no later than 180 days prior to the expiration date. Any
permittee that has not requested renewal at least 180 days prior to expiration, or any permittee that does not
have a permit after the expiration and has not requested renewal at least 180 days prior to expiration, will be
subjected to enforcement procedures as provided in NCGS § 143-2153.6 and 33 USC 1251 et. seq.
2. Transfers
This permit is not transferable to any person except after notice to and approval by the Director. The
Director may require modification or revocation and reissuance of the permit to change the name and
incorporate such other requirements as may be necessary under the Clean Water Act. The Permittee is
required to notify the Division in writing in the event the permitted facility is sold or closed.
3. Signatory Requirements
All applications, reports, or information submitted to the Director shall be signed and certified.
a. All applications to be covered under this individual permit shall be signed as follows:
(1) For a corporation: by a responsible corporate officer. For the purpose of this Section, a
responsible corporate officer, means: (a) a president, secretary, treasurer or vice president
of the corporation in charge of a principal business function, or any other person who
performs similar policy or decision making functions for the corporation, or (b) the
manager of one or more manufacturing production or operating facilities employing more
than 250 persons or having gross annual sales or expenditures exceeding 25 million (in
second quarter 1980 dollars), if authority to sign documents has been assigned or
delegated to the manager in accordance with corporate procedures.
(2) For a partnership or sole proprietorship: by a general partner or the proprietor,
respectively; or
(3) For a municipality, State, Federal, or other public agency: by either a principal executive
officer or ranking elected official.
b. All reports required by the individual permit and other information requested by the Director shall
be signed by a person described above or by a duly authorized representative of that person. A
person is a duly authorized representative only if:
(1) The authorization is made in writing by a person described above;
Part III Page 3 of 8

Permit No. NCS000508
(2) The authorization specified either an individual or a position having responsibility for the
overall operation of the regulated facility or activity, such as the position of plant
manager, operator of a well or well field, superintendent, a position of equivalent
responsibility, or an individual or position having overall responsibility for environmental
matters for the company. (A duly authorized representative may thus be either a named
individual or any individual occupying a named position.); and
(3) The written authorization is submitted to the Director.
C. Any person signing a document under paragraphs a. or b. of this section shall make the following
certification:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
4. Individual Permit Modification Revocation and Reissuance or Termination
The issuance of this individual permit does not prohibit the Director from reopening and modifying the
individual permit, revoking and reissuing the individual permit, or terminating the individual permit as
allowed by the laws, rules, and regulations contained in Title 40, Code of Federal Regulations, Parts 122
and 123; Title 15A of the North Carolina Administrative Code, Subchapter 211.0100; and North Carolina
General Statute 143-215.1 et. al.
5. Permit Actions
The permit may be modified, revoked and reissued, or terminated for cause. The notification of planned
changes or anticipated noncompliance does not stay any individual permit condition.
SECTION C: OPERATION AND MAINTENANCE OF POLLUTION CONTROLS
1. Prouer Operation and Maintenance
The permittee shall at all times properly operate and maintain all facilities and systems of treatment and
control (and related appurtenances) which are installed or used by the permittee to achieve compliance with
the conditions of this individual permit. Proper operation and maintenance also includes adequate
laboratory controls and appropriate quality assurance procedures. This provision requires the operation of
back-up or auxiliary facilities or similar systems which are installed by a permittee only when the operation
is necessary to achieve compliance with the conditions of this individual permit.
2. Need to Halt or Reduce Not a Defense
It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the condition of this individual permit.
3. Bypassing of Stormwater Control Facilities
Bypa-s is prohibited and the Director may take enforcement action against a permittee for bypass unless:
Part III Page 4 of 8

Permit No. NCS000508
a. Bypass was unavoidable to prevent loss of life, personal injury or severe property damage; and
b. There were no feasible alternatives to the bypass, such as the use of auxiliary control facilities,
retention of stormwater or maintenance during normal periods of equipment downtime of dry
weather. This condition is not saflsfied if adequate backup controls should have been installed in
the exercise of reasonable engineering judgment to prevent a bypass which occurred during normal
periods of equipment downtime or preventive maintenance; and
C. The permittee submitted notices as required under, Part III, Section E of this permit.
If the Director determines that it will meet the three conditions listed above, the Director may approve an
anticipated bypass after considering its adverse effects.
SECTION D: MONITORING AND RECORDS
Representative Sampling
Samples collected and measurements.taken, as required herein, shall be characteristic of the volume and
nature of the permitted discharge. Analytical sampling shall be performed during a representative storm
event. Samples shall be taken on a day and time that is characteristic of the discharge. All samples shall be
taken before the discharge joins or is diluted by any other waste stream, body of water, or substance.
Monitoring points as specified in this permit shall not be changed without notification to and approval of the
Director.
2. Recording Results
For each measurement, sample, inspection or maintenance activity performed or collected pursuant to the
requirements of this individual permit, the permittee shall record the following information:
a. The date, exact place, and time of sampling, measurements, inspection or maintenance activity;
b. The individual(s) who performed the sampling, measurements, inspection or maintenance activity;
c. The date(s) analyses were performed;
d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.
3. Flow Measurements
Where required, appropriate flow measurement devices and methods consistent with accepted scientific
practices shall be selected and used to ensure the accuracy and reliability of measurements of the volume of
monitored discharges.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to the EMC regulations published pursuant to
NCGS 143-215.63 et. seq, the Water and Air Quality Reporting Acts, and to regulations published pursuant
to Section 304(g), 33 USC 1314, of the Federal Water Pollution Control Act, as Amended, and Regulation
40 CFR 136.
Part III Page 5 of 8

Permit No. NCS000508
To meet the intent of the monitoring required by this individual permit, all test procedures must produce
minimum detection and reporting levels and all data generated must be reported down to the minimum
detection or lower reporting level of the procedure.
5. Representative r utfall
If a facility has multiple discharge locations with substantially identical stormwater discharges that are
required to be sampled, the permittee may petition the Director for representative outfall status. If it is
established that the stormwater discharges are substantially identical and the permittee is granted
representative outfall status, then sampling requirements may be performed at a reduced number of outfalls.
6. Records Retention
Visual monitoring shall be documented and records maintained at the facility along with the Stormwater
Pollution Prevention Plan. Copies of analytical monitoring results shall also be maintained on -site. The
permittee shall retain records of all monitoring information, including all calibration and maintenance
records and all original strip chart recordings for continuous monitoring instrumentation, and copies of all
reports required by this individual permit for a period of at least 5 years from the date of the sample,
measurement, report or application. This period may be extended by request of the Director at any time.
Inspection and Entry
The permittee shall allow the Director, or an authorized representative (including an authorized contractor
acting as a representative of the Director), or in the case of a facility which discharges through a municipal
separate storm sewer system, an authorized representative of a municipal operator or the separate stoma
sewer system receiving the discharge, upon the presentation of credentials and other documents as may be
required by law, to;
a. Enter upon the permittee's premises where a regulated facility or activity is located or conducted,
or where records must be kept under the conditions of this individual permit;
b. Have access to and copy, at reasonable times, any records that must be kept under the conditions of
this individual permit;
C. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment),
practices, or operations regulated or required under this individual permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring individual permit compliance or as
otherwise authorized by the Clean Water Act, any substances or parameters at any location.
SECTION E: REPORTING REQUIREMENTS
1. Discharge Monitoring Reports
Samples analyzed in accordance with the terms of this permit shall be submitted to the Division on
Discharge Monitoring Report forms provided by the Director. Submittals shall be received by the Division
no later than 30 days from the date the facility receives the sampling results from the laboratory.
2. Submitting Reports
Duplicate signed copies of all reports required herein, shall be submitted to the following address:
Part III Page 6 of 8

Permit No. NCS000508
Division of Water Quality
ATTENTION: Central Files
1617 Mail Service Center
3. Availability of Reports Raleigh, North Carolina 27699-1617
Except for data determined to be confidential under NCGS 143-215.3(a)(2) or Section 308 of the Federal
Act, 33 USC 1318, all reports prepared in accordance with the terms shall be available for public inspection
at the offices of the Division of Water Quality. As required by the Act, analytical data shall not be
considered confidential. Knowingly making any false statement on any such report may result in the
imposition of criminal penalties as provided for in NCGS 143-215.613 or in Section 309 of the Federal Act.
4. Non-Stormwater Discharges
If the storm event monitored in accordance with this individual permit coincides with a non-stormwater
discharge, the permittee shall separately monitor all parameters as required under the non-stormwater
discharge permit and provide this information withthe stormwater discharge monitoring report.
5. Planned Changes
The permittee shall give notice to the Director as soon as possible of any planned changes at the permitted
facility which could significantly alter the nature or quantity of pollutants discharged. This notification
requirement includes pollutants which are not specifically listed in the individual permit or subject to
notification requirements under 40 CF$ Part 122.42 (a).
6. Anticipated Noncompliance
The permittee shall give notice to the Director as soon as possible of any planned changes at the permitted
facility which may result in noncompliance with the individual permit requirements.
7. Bypass
a. Anticipated bypass. If the permittee }Mows in advance of the need for a bypass, it shall submit
prior notice, if possible at least ten days before the date of the bypass; including an evaluation of
the anticipated quality and affect of the bypass.
b. Unanticipated bypass. The permittee shall submit notice within 24 hours of becoming aware of an
unanticipated bypass.
8. Twenty-four Hour Reporting
The permittee shall report to the central office or the appropriate regional office any noncompliance which
may endanger health or the environment. Any information shall be provided orally within 24 hours from
the time the permittee became aware of the circumstances. A written submission shall also be provided
within 5 days of the time the permittee becomes aware of the circumstances.
The written submission shall contain a description of the noncompliance, and its causes; the period of
noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the
anticipated time compliance is expected to continue; and steps taken or planned to reduce, eliminate, and
prevent reoccurrence of the noncompliance.
The Director may waive the written report on a case -by -case basis if the oral report has been received
within 24 hours.
Part III Page 7 of 8

Permit No. NCS000508
9. Other Noncom fiance
The permittee shall report all instances of noncompliance not reported under 24 hour reporting at the time
monitoring reports are submitted.
10. Other Information
Where the permittee becomes aware that it failed to submit any relevant facts in an application for an
individual permit or in any report to the Director, it shall promptly submit such facts or information.
Part III Page 8 of 8

Permit No. NCS000508
PART IV LIMITATIONS REOPENER
This individual permit shall be modified or alternatively, revoked and reissued, to comply with any applicable
effluent guideline or water quality standard issued or approved under Sections 302(b) (2) (c), and (d), 304(b) (2) and
307(a) of the Clean Water Act, if the effluent guideline or water quality standard so issued or approved:
a. Contains different conditions or is otherwise more stringent than any effluent limitation in the individual
permit; or
b. Controls any pollutant not limited in the.individual permit.
The individual permit as modified or reissued under this paragraph shall also contain any other requirements in the
Act then applicable.
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS
The pennittee must pay the administering and compliance monitoring fee within 30 (thirty) days after being billed by
the Division. Failure to pay the fee in timely manner in accordance with 15A NCAC 2H .0105(b)(4) may cause this
Division to initiate action to revoke the Individual Permit.
PART VI DEFINITIONS
1. Act
See Clean Water Act.
2. Arithmetic Mean
The arithmetic mean of any set of values is the summation -of the individual values divided by the number of
individual values.
3. Allowable Non-Stormwater Discharges
This permit regulates stormwater discharges. Non-stormwater discharges which shall be allowed in the
stormwater conveyance system are:
(a) All other discharges that are authorized by a non-stormwater NPDES permit
(b) Uncontaminated groundwater, foundation drains, air -conditioner condensate without added
chemicals, springs, discharges of uncontaminated potable water, waterline and fire hydrant
flushings, water from footing drains, flows from riparian habitats and wetlands.
(c) Discharges resulting from fire -fighting or fire -fighting training.
4. Best Management Practices (BMPs)
Measures or practices used to reduce the amount of pollution entering surface waters. BMPs may take the
form of a process, activity, or physical structure.
Parts IV, V, VI Page 1 of 5

Permit No. NCS000508
5. Bypass
A bypass is the known diversion of stormwater from any portion of a stormwater control facility including
the collection system, which is not a designed or established operating mode for the facility.
6. Bulk Storage of Liquid Products
Liquid raw materials, manufactured products, waste materials or by-products with a single above ground
storage container having a capacity of greater than 660 gallons or with multiple above ground storage
containers located in close proximity to each other having a total combined storage capacity of greater than
1,320 gallons.
Clean Water Act
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC
1251, et. seq.
8. Co-Permittee
A permittee to an NPDES permit that is only responsible for permit conditions relating to the discharge to
which it is operator.
9.. Division orDWO
The Divi-;on of Water Quality, Department of Environment and Natural Resources.
10. Director
The Director of the Division of Water Quality, the permit issuing authority.
11. EMC
The North Carolina Environmental Management Commission.
12. Grab Sample
An individual sample collected instantaneously. Grab samples that will be directly analyzed or qualitatively
monitored must be taken within the first 30 minutes of discharge.
13. Hazardous Substance
Any substance designated under 40 CFR Part 116 pursuant to Section 311 of the Clean Water Act.
14. Landfill
A disposal facility or part of a disposal facility where waste is placed in or on land and which is not a land
treatment facility, a surface impoundment, an injection well, a hazardous waste long-term storage facility or
a surface storage facility.
15. Municipal Separate Storm Sewer System
A stormwater collection system within an incorporated area of local self-government such as a city or town.
Parts IV, V, VI Page 2 of 5

Permit No. NCS000508
16. 'Overburden
Any material of any nature, consolidated or unconsolidated, that overlies a mineral deposit, excluding
topsoil or similar naturally -occurring surface materials that are not disturbed by mining operations.
17. Permittee
The owner or operator issued a permit pursuant to this individual permit.
18. Point Source Discharge of Stormwater
Any discernible, confined and discrete conveyance including, but not specifically limited to, any pipe, ditch,
channel, tunnel, conduit, well, or discrete fissure from which stormwater is or may be discharged to waters
of the state.
19. Remesentative Storm Event
A storm event that measures greater than 0.1 inches of rainfall and that is preceded by at least 72 hours in which no
storm event measuring greater than 0.1 inches has occurred. A single storm event may contain up to 10 consecutive
hours of no precipitation. For example, if it rains for 2 hours without producing any collectable discharge, and then
stops, a sample may be collected if a rain producing a discharge begins again within the next 10 hours.
20. Reoresentatve Outfall Status
When it is established'that the discharge of stormwater runoff from a single outfall is representative of the
discharges at multiple outfalls, the DWQ may grant representative outfalI status. Representative outfall
status allows the permittee to perform analytical monitoring at a reduced number of outfalls.
21. Rinse Water Dischar P
The discharge of rinse water from equipment cleaning areas associated with industrial activity. Rinse
waters from vehicle and equipment cleaning areas are process wastewaters and do not include washwaters
utilizing any type of detergent or cleaning agent.
22. Secondary Containment
Spill containment for the contents of the single largest tank within the containment structure plus sufficient
freeboard to allow for the 25-year, 24-hour storm event.
23. Section 313 Water Priority Chemical
A chemical or chemical category which
a. Is listed in 40 CFR 372.65 pursuant to Section 313 of Title III of the Superfund Amendments and
Reauthorization Act (SARA) of 1986, also titled the Emergency Planning and Community Right -
to -Know Act of 1986;
b. Is present at or above threshold levels at a facility subject to SARA title III, Section 313 reporting
requirements; and
C. That meet at least one of the following criteria:
(1) Is listed in Appendix D of 40 CFR part 122 on either Table II (organic priority pollutants),
Table III (certain metals, cyanides, and phenols) or Table IV (certain toxic pollutants and
hazardous substances);
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Permit No. NCS000508
(2) Is listed as a hazardous substance pursuant to section 311(b)(2)(A) of the CWA at 40 CFR
116.4;or
(3) Is a pollutant for which EPA has published acute or chronic water quality criteria.
24. Severe Property Damage
Means substantial physical damage to property, damage to the control facilities which causes them to
become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected
to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by
delays in production.
25. Significant Materials
Includes, but is not limited to: raw materials; fuels; materials such as solvents, detergents, and plastic
pellets; finished materials such as metallic products; raw materials used in food processing or production;
hazardous substances designated under section 101(14) of CERCLA; any chemical the facility is required to
report pursuant to section 313 of Title III of SARA; fertilizers; pesticides; and waste products such as ashes,
slag and sludge that have the potential to be released with stormwater discharges.
26. Significant Spills
Includes, but is not limited to: releases of oil or hazardous substances in excess of reportable quantities
under section 311 of the Clean Water Act (Ref: 40 CFR 110.10 and CFR 117.21) or section 102 of
CERCLA (Ref: 40 CFR 302.4).
27. Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following rainfall or as a
result. of snowmelt.
28, Stormwater Associated with Industrial Activity
The discharge from any point source which is used for collecting and conveying stormwater and which is
directly related to manufacturing, processing or raw material storage areas at an industrial site. Facilities
considered to be engaged in "industrial activities" include those activities defined in 40 CFR 122.26(b)(14).
The term does not include discharges from facilities or activities excluded from the NPDES program.
29. Stormwater Pollution Prevention Plan
A comprehensive site -specific plan which details measures and practices to reduce stormwater pollution and
is based on an evaluation of the pollution potential of the site.
30. Ten Year Design Storm
The maximum 24 hour precipitation event expected to be equaled or exceeded on the average once in ten
years. Design storm information can be found in the State of North Carolina Erosion and Sediment Control
Planning and Design Manual.
31. Total Flow
The flow corresponding to the time period over which the entire storm event occurs. Total flow shall be
either; (a) measured continuously, (b) calculated based on the amount of area draining to the outfall, the
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Permit No. NCS000508
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.
32. Toxic Pollutant
Any pollutant listed as toxic under Section 307(a)(1) of the Clean Water Act.
33. . Upset
Means an exceptional incident in which there is unintentional and temporary noncompliance with
technology based permit effluent limitations because of factors beyond the reasonable control of the
permittee. An upset does not include noncompliance to the extent caused by operational error, improperly
designed treatment or control facilities, inadequate treatment or control facilities, lack of preventive
maintenance, or careless or improper operation.
34. Vehicle Maintenance Activity
Vehicle rehabilitation, mechanical repairs, painting, fueling, lubrication, vehicle cleaning operations, or
airport deicing operations.
35. Visible Sedimentation
Solid particulate matter, both mineral and organic, that has been or is being transported by water, air,
gravity, or ice from its site of origin which can be seen with the unaided eye.
36. 25-year. 24 hour storm event
The maximum 24-hour precipitation event expected to be equaled or exceeded, on the average, once in 25
years.
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Permit No. NCS000508
NITORING, CONTROLS AND LIMITATIONS FOR
PERMITTED DISCHARGES
SPECIAL CONDITIONS
A (9.) ACUTE TOXICITY MONITORING- Episodic (Outfalls 024, 026, 004, 006, 027, 030
and 014)
The permittee shall conduct 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.
The parameter code for this test is TAE6C. All toxicity testing results required as part of this
permit condition will be entered on the Monitoring Report Form 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 Branch
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 *est 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
rnay',,; 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.
END
Special Conditions Page 1 of 1