NCS000546_FINAL Permit_20150515

NCS000546
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
PERMIT
TO DISCHARGE STORMWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION 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,
Duke Energy Carolinas, LLC
is hereby authorized to discharge stormwater from a facility located at
Allen Steam Station
253Plant Allen Road
Belmont, NC
Gaston County
to receiving waters designated as Catawba River and South Fork River, a class WS -V, B
stream in the Catawba River Basin, in accordance with the discharge limitations,
monitoring requirements, and other conditions set forth in Parts I, I1, II1, and IV hereof.
This permit shall become effective May 15, 2015.
This permit and the authorization to discharge shall expire at midnight on April 30, 2020.
Signed this day May 15, 2015.
Original signed by Tracy E. Davis
Tracy E. Davis, PE, CPM, Director
Division of Energy, Mineral and Land Resources
By the Authority of the Environmental Management Commission

THIS PAGE INTENTIONAL BLANK

Permit No. NCS000546
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
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS
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
11.
Onshore or Offshore Construction
12.
Duty to Reapply
Section B: General
Conditions
1.
Permit Expiration
2.
Transfers
3.
Signatory Requirements
4.
Permit Modification, Revocation and Reissuance, or Termination
I

Permit No. NCS000546
5. Permit Actions
6. Annual Administering and Compliance Monitoring Fee
Requirements
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
1.
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-Stormwater Discharges
5.
Planned Changes
6.
Anticipated Noncompliance
7.
Spills
8.
Bypass
9.
Twenty-four Hour Reporting
10.
Other Noncompliance
11.
Other Information
PART IV DEFINITIONS
ii

Permit No. NCS000546
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 is authorized to discharge stormwater associated with industrial activity.
Such discharges shall be controlled, limited and monitored as specified in this permit.
If industrial materials and activities are not exposed to precipitation or runoff as described
in 40 CFR §122.26(g), the facility may qualify for a No Exposure Exclusion from NPDES
stormwater discharge permit requirements. Any owner or operator wishing to obtain a No
Exposure Exclusion must submit a No Exposure Certification Notice of Intent (NOI) form to
the Division; must receive approval by the Division; must maintain no exposure conditions
unless authorized to discharge under a valid NPDES stormwater permit; and must recertify
the No Exposure Exclusion annually.
SECTION B: PERMITTED ACTIVITIES
Until this permit expires or is modified or revoked, the permittee is 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 permit. All stormwater 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. The stormwater discharges allowed by this permit shall not cause or contribute
to violations of Water Quality Standards.
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.
Part I Page 1 of 2

Permit No. NCS000546
SECTION C: LOCATION MAP
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Map le 1:24,000
Duke Energy Carolinas, LLC
Atlen Steam Station
Lattide: 354 11' 25" N
LoNitude: 810 fes' 32' W
County: 'Garb
Receming Wim: Gatrwba River
Stream Cass: WS -V, B
Sub43asin: 83418-37 (Catawba River Basin)
Part I Page 2 of 2
Facility Location

Permit No. NCS000546
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR
PERMITTED DISCHARGES
SECTION A: STORMWATER POLLUTION PREVENTION PLAN
The permittee shall develop and implement a Stormwater Pollution Prevention Plan
(SPPP). The SPPP shall be maintained on site unless exempted from this requirement by
the Division. The SPPP is public information in accordance with Part III, Standard
Conditions, Section E, paragraph 3 of this permit. The SPPP should also specifically and
separately address deconstruction, demolition, coal, and/or coal ash hauling or disposal
activities. The SPPP shall include, at a minimum, the following items:
Site Overview. The Site Overview 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 Overview 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 waters to which the stormwater outfalls
discharge, 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 points of stormwater discharge associated with industrial
activity. The general location map (or alternatively the site map) shall identify
whether any receiving waters are impaired (on the state's 303(d) list of impaired
waters) or if the site is located in a watershed for which a TMDL has been
established, and what the parameters of concern are.
(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. A narrative description of the potential pollutants that
could be expected to be present in the stormwater discharge from each outfall. The
narrative should also reference deconstruction, demolition, coal, and/or coal ash
hauling or disposal activities where applicable.
(c) A site map drawn at a scale sufficient to clearly depict: the site property boundary;
the stormwater discharge outfalls; all on-site and adjacent surface waters and
wetlands; industrial activity areas (including storage of materials, disposal areas,
process areas, loading and unloading areas, and haul roads); site topography and
finished grade; all drainage features and structures; drainage area boundaries and
total contributing area for each outfall; direction of flow in each drainage area;
industrial activities occurring in each drainage area; buildings; stormwater Best
Management Practices (BMPs); and impervious surfaces. The site map must
indicate the percentage of each drainage area that is impervious, and the site map
must include a graphic scale indication and north arrow.
(d) A list of significant spills or leaks of pollutants during the previous three (3) years
and any corrective actions taken to mitigate spill impacts.
Part II Page 1 of 16

Permit No. NCS000546
(e) Certification that the stormwater outfalls have been evaluated for the presence of
non-stormwater discharges. The permittee shall submit the first certification
no later than 90 days after the effective date of this permit to the Stormwater
Permitting Program Central Office and shall re -certify annually that the
stormwater outfalls have been evaluated for the presence of non-stormwater
discharges. For any non-stormwater discharge identified, the permittee shall
indicate how that discharge is permitted or otherwise authorized. The certification
statement will be signed in accordance with the requirements found in Part III,
Standard Conditions, Section B, Paragraph 3.
2. Stormwater Management Strategy. The Stormwater Management Strategy shall
contain a narrative description of the materials management practices employed which
control or minimize the stormwater exposure of significant materials, including
structural and nonstructural measures. This strategy should also address
deconstruction, demolition, coal, and/or coal ash hauling or disposal activities where
applicable. The Stormwater Management Strategy, 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 rainfall and run-on flows. 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, this review shall document the feasibility of diverting the stormwater
run-on away from areas of potential contamination.
(b) Secondary Containment Requirements and Records. Secondary containment is
required for: bulk storage of liquid materials; storage in any amount of Section 313
of Title III of the Superfund Amendments and Reauthorization Act (SARA) water
priority chemicals; and storage in any amount of hazardous substances, in order to
prevent leaks and spills from contaminating stormwater runoff. A table or summary
of all such tanks and stored materials and their associated secondary containment
areas shall be maintained. If the secondary containment devices are connected to
stormwater conveyance systems, the connection shall be controlled by manually
activated valves or other similar devices (which shall be secured closed with a
locking mechanism). Any stormwater that accumulates in the containment area
shall be 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 any material. 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 (5) years. For facilities subject to a federal oil Spill Prevention,
Control, and Countermeasure (SPCC) Plan, any portion of the SPCC Plan fully
compliant with the requirements of this permit may be used to demonstrate
compliance with this permit.
Part II Page 2 of 16

Permit No. NCS000546
In addition to secondary containment for tankage, the permittee shall provide drip
pans or other similar protection measures for truck or rail car liquid loading and
unloading stations.
(c) BMP Summary. A listing of site structural and non-structural Best Management
Practices (BMPs) shall be provided. The installation and implementation of BMPs
shall be based on the assessment of the potential for sources to contribute
significant quantities of pollutants to stormwater discharges and on data collected
through monitoring of stormwater discharges. The BMP Summary shall include a
written record of the specific rationale for installation and implementation of the
selected site BMPs. The BMP Summary should also address deconstruction,
demolition, coal, and/or coal ash hauling or disposal activities where applicable.
The permittee shall refer to the BMPs described in EPA's Multi -Sector Permit
(MSGP) and Industrial Stormwater Fact Sheet for Steam Electric Power Generating
Facilities (EPA -833-F-06-030) for guidance on BMPs that may be appropriate for
this site. The BMP Summary shall be reviewed and updated annually.
3. Spill Prevention and Response Procedures. The Spill Prevention and Response
Procedures (SPRP) shall incorporate an assessment of potential pollutant sources based
on a materials inventory of the facility. Facility personnel responsible for implementing
the SPRP shall be identified in a written list incorporated into the SPRP and signed and
dated by each individual acknowledging their responsibilities for the plan. A
responsible person shall be on-site at all times during facility operations that have
increased potential to contaminate stormwater runoff through spills or exposure of
materials associated with the facility operations. The SPRP must be site stormwater
specific. Therefore, an oil Spill Prevention Control and Countermeasure (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 plan with the SPRP
may be incorporated by reference into the SPRP.
4. Preventative Maintenance and Good Housekeeping Program. A preventative
maintenance and good housekeeping program shall be developed and implemented.
The program shall address all stormwater control systems (if applicable), stormwater
discharge outfalls, all on-site and adjacent surface waters and wetlands, industrial
activity areas (including material storage areas, material handling areas, disposal areas,
process areas, loading and unloading areas, and haul roads), all drainage features and
structures, and existing structural BMPs.
The program shall establish schedules of inspections, maintenance, and housekeeping
activities of stormwater control systems, as well as facility equipment, facility areas,
and facility systems that present a potential for stormwater exposure or stormwater
pollution where not already addressed under another element of the SPPP. Inspection
of material handling areas and regular cleaning schedules of these areas shall be
incorporated into the program. Compliance with the established schedules for
inspections, maintenance, and housekeeping shall be recorded and maintained in the
SPPP. The program should also address deconstruction, demolition, coal, and/or coal
ash hauling or disposal activities where applicable. The Good Housekeeping Program
shall also include, but not be limited to, BMPs to accomplish the following:
Part II Page 3 of 16

Permit No. NCS000546
(a) Minimize contamination of stormwater runoff from oil-bearing equipment in
switchyard areas;
(b) Minimize contamination of stormwater runoff from delivery vehicles and rail
cars arriving and departing the plant site;
(c) Inspect all residue -hauling vehicles for proper covering over the load,
adequate gate -sealing, and overall integrity of the container body. Repair
vehicles as necessary; and
(d) Reduce or control the tracking of ash and residue from ash loading and
storage areas;
5. Facility Inspections. Inspections of the facility (including tanks, pipes, and equipment)
and all stormwater systems shall occur as part of the Preventative Maintenance and
Good Housekeeping Program at a minimum on a semi-annual schedule, once during the
first half of the year (January to June), and once during the second half (July to
December), with at least 60 days separating inspection dates (unless performed more
frequently than semi-annually). These facility inspections are different from, and in
addition to, the stormwater discharge characteristic monitoring at the outfalls required
in Part 11 B, and C of this permit.
6. Employee Training. Training programs shall be developed and training provided at a
minimum on an annual basis for facility personnel with responsibilities for: spill
response and cleanup, preventative maintenance activities, and for any of the facility's
operations that have the potential to contaminate stormwater runoff. The facility
personnel responsible for implementing the training shall be identified, and their
annual training shall be documented by the signature of each employee trained.
7. Responsible Party. The SPPP shall identify a specific position or positions responsible
for the overall coordination, development, implementation, and revision of the SPPP.
Responsibilities for all components of the SPPP shall be documented and position
assignments provided.
8. SPPP Amendment and Annual Update. The permittee shall amend the SPPP
whenever there is a change in design, construction, operation, site drainage,
maintenance, or configuration of the physical features which may have a significant
effect on the potential for the discharge of pollutants to surface waters. All aspects of
the SPPP shall be reviewed and updated on an annual basis. The annual update
shall include:
(a) an updated list of significant spills or leaks of pollutants for the previous three
(3) years, or the notation that no spills have occurred (element of the Site
Overview);
(b) a written re -certification that the stormwater outfalls have been evaluated for
the presence of non-stormwater discharges (element of the Site Overview);
(c) a documented re-evaluation of the effectiveness of the on-site stormwater
BMPs (BMP Summary element of the Stormwater Management Strategy).
(d) a review and comparison of sample analytical data to benchmark values (if
applicable) over the past year, including a discussion about Tiered Response
Part II Page 4 of 16

Permit No. NCS000546
status. The permittee shall use the Division's Annual Summary Data
Monitoring Report (DMR) form, available from the Stormwater Permitting
Program's website (See `Monitoring Forms' here:
http: //portal.ncdenr.org/web/lr/npdes-stormwater).
If the Director notifies the permittee that the SPPP does not meet one or more of the
minimum requirements of the permit, the permittee shall have 30 days to respond.
Within 30 days of such notice, the permittee shall submit a time schedule to the
Director for modifying the SPPP 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 been made.
9. SPPP Implementation. The permittee shall implement the Stormwater Pollution
Prevention Plan and all appropriate BMPs consistent with the provisions of this permit,
in order to control contaminants entering surface waters via stormwater.
Implementation of the SPPP shall include documentation of all monitoring,
measurements, inspections, maintenance activities, and training provided to
employees, including the log of the sampling data and of actions taken to implement
BMPs associated with the industrial activities, including vehicle maintenance activities.
Such documentation shall be kept on-site for a period of five (5) years and made
available to the Director or the Director's authorized representative immediately upon
request.
Part II Page 5 of 16

Permit No. NCS000546
SECTION B: ANALYTICAL MONITORING REQUIREMENTS
Analytical monitoring of stormwater discharges shall be performed as specified in Tables
1-5. All analytical monitoring shall be performed during a measureable storm event at
the specified-stormwater discharge outfalls (SDOs) that discharge stormwater associated
with industrial activity (See Definitions).
A measurable storm event is a storm event that results in an actual discharge from the
permitted site outfall. The previous measurable storm event must have been at least 72 hours
prior. The 72 -hour storm interval does not apply if the permittee is able to document that a
shorter interval is representative for local storm events during the sampling period, and the
permittee obtains approval from the local DEMLR Regional Engineer. See Definitions.
The parameters in Table 1 shall be monitored during a measurable storm event from
Outfalls SWO01 and SWO01A (Drainage Area 1), Outfall SWO02 (Drainage Area 2), Outfall
SWO03 (Drainage Area 3), Outfall SW005 (Drainage Area 5), Outfall SWO07 (Drainage Area
7), Outfall SWO08 (Drainage Area 8), Outfall SWO09 (Drainage Area 9), and Outfall SWO10
(Drainage Area 10), Outfall group SWO13 (Drainage Area 13 includes thirteen 10" stormwater
discharge outfalls along the rail line), Outfall SWO15 (Drainage Area 15), Outfall SWO16
(Drainage Area 16), Outfall SW020 (Drainage Area 20)discharging to the Catawba River.
Outfalls SWO01 and SWO01A (Drainage Area 1) includes approximately 2,000 linear
feet of rail lines and undeveloped wooded areas upland of the rail lines.
Outfall SWO02 (Drainage Area 2) includes approximately 1,000 linear feet of paved
road and a 2.5 acre laydown area.
Outfall SWO03 (Drainage Area 3) includes approximately 1,500 linear feet of rail
lines.
Outfall SW005 (Drainage Area 5) is comprised of a gravel laydown yard and
vegetated slopes located west and upland of the limestone unloading area. The
gravel laydown yard comprises approximately 3 acres. The drainage area also
includes approximately 500 linear feet of paved roadway.
Outfall SWO07 (Drainage Area 7) includes approximately 1,500 linear feet of rail
lines, and 400 linear feet of gravel roadway and 400 linear feet of limestone
conveyor.
Outfall SWO08 (Drainage Area 8) includes approximately 2,400 linear feet of rail
lines, and 1000 linear feet of paved road and 400 linear feet of limestone conveyor.
Outfall SWO09 (Drainage Area 9) includes approximately 940 linear feet of rail lines.
Outfall SWO10 (Drainage Area 10) includes approximately 1,280 linear feet of rail
lines.
Outfall Group SWO13 (Drainage Area 13) includes thirteen 10" stormwater
discharge outfalls along approximately 12,400 linear feet of gravel road and750
linear feet of rail lines.
Outfall SWO15 (Drainage Area 15) includes a large soil borrow area, two ash
structure fill areas, and approximately a one mile gravel and dirt road.
Outfall SWO16 (Drainage Area 16) includes approximately 1,700 linear feet of paved
access road, 1,000 linear feet of a paved ash haul road, 700 linear feet of paved road
south of the access road, 1,000 linear feet of dirt roads and a gravel laydown and
equipment parking area north of the access road.
Part II Page 6 of 16

Permit No. NCS000546
Outfall SW020 (Drainage Area 20) includes approximately 1,300 linear feet of paved
access road, and an earth spoil area and a gravel construction parking area and
storage area.
Table 1. Analytical Monitoring Requirements for Outfalls SWO01 and SWO01A,
SWO02, SWO03, SWO05, SWO07, SW008, SWO09, SWO10, Outfall Group
SWO131, SWO15, SWO16, and SW020 discharging to the Catawba River
Discharge
Measurement
Sample
Sample
Characteristics
Units
Frequencyl
Type2
Location3
Total Suspended Solids (TSS)
semi-annual
(quarterly, during
Grab
SDO
mg/L
coal or ash
transport only)
Total Rainfal14
semi-annual
(quarterly, during
Rain
inches
coal or ash
-
transport only)Gauge
40 CFR Part 423 Appendix A:
quarterly, during
Priority Pollutant Metals - Ag, As, Be,
mg/L
coal or ash
Grab
SDO
Cd, Cr, Cu, Hg, Ni, Pb, Sb, Se, Tl, Zn5
transport only
Borons
quarterly, during
mg/L
coal or ash
Grab
SDO
transport only
pHs
quarterly, during
standard
coal or ash
Grab
SDO
transport only
Footnotes:
1 Measurement Frequency: Twice per year (unless other provisions of this permit prompt monthly
sampling) during a measureable storm event, until either another permit is issued for this facility or until
this permit is revoked or rescinded. If the facility is monitoring monthly because of Tier Two or Three
response actions under the previous permit, the facility shall continue a monthly monitoring and
reporting schedule in Tier Two or Tier Three status until relieved by the provisions of this permit or
the Division.
2 Grab samples shall be collected within the first 30 minutes of discharge. When physical separation between
outfalls prevents collecting all samples within the first 30 minutes, sampling shall begin within the first 30
minutes, and shall continue until completed.
3 Sample Location: Samples shall be collected at each stormwater discharge outfall (SDO) specified above
unless representative outfall status (ROS) has been granted. The permittee may petition the Director for
ROS using DEMLR's ROS Request Form. DEMLR may grant ROS if stormwater discharges from a single
outfall are representative of discharges from multiple outfalls. Approved ROS will reduce the number of
outfalls where the analytical sampling requirements apply and will be documented in a letter to the
permittee. A copy of the Division's letter granting ROS shall be kept on site.
4 For each sampled measureable storm event, the total precipitation must be recorded. An on-site rain gauge
is required. Where isolated sites are unmanned for extended periods of time, a local rain gauge reading
may be substituted for an on-site reading.
Outfall Group 13 (Drainage Area 13) includes thirteen 10" stormwater discharge outfalls along the rail line.
Part II Page 7 of 16

Permit No. NCS000546
5 These parameters shall be monitored only if coal or coal ash is transported through the drainage
areas of these outfalls during the quarterly monitoring period in Table 7. Mercury shall be
measured by EPA Method 1631E.
Outfall SWO04 (Drainage Area 4), Outfall SWO06 (Drainage Area 6), Outfall SWO14
(Drainage Area 14), Outfall SW17 (Drainage Area 17), Outfall SWO19 (Drainage Area
19) and SW021 (Drainage Area 21).
Outfalls SWO04 (Drainage Area 4), SWO06 (Drainage Area 6), SWO14 (Drainage Area 14),
SWO17 (Drainage Area 17), SWO19 (Drainage Area 19) and SW021 (Drainage Area 21) do
not include industrial activities. Any modifications to Outfalls SWO04, SWO06, SWO14,
SW017, SWO19, and SW021 that result in a potential stormwater discharge associated with
past or present industrial activities will require a modification to this permit.
Outfall SWO11 (Drainage Area 11), Outfall SWO12 (Drainage Area 12), and Outfall
SWO18 (Drainage Area 18)
The parameters in Table 2 shall be monitored during a measurable storm event from
Outfall SWO11 (Drainage Area 11), Outfall SWO12 (Drainage Area 12), and Outfall SWO18
(Drainage Area 18) discharging to the Catawba River.
Drainage Area 11 includes developed areas south and southwest of the station
Powerhouse. The drainage area includes approximately 5.3 acres of impervious areas
comprised of roof drainage, paved parking areas, switchyard, and the station access road.
The drainage area includes approximately 3,100 linear feet of rail lines and 1,600 linear
feet of ash sluice piping, transformers and electrical equipment, and a 500 gallon
aboveground gasoline tank. Uncontained tanker unloading takes place within Drainage
Area 11. Contained areas of the transformer and switchyard are directed to the 65,300
gallon oil trap tank.
Drainage Area 12 is primarily comprised of gravel covered surfaces and vegetative yard
areas west of the station powerhouse. The drainage area is comprised of a transformer
yard and a graveled surface switchyard and includes ten large transformers, approximately
1,400 linear feet of rail lines, 300 linear feet of paved road, and 800 linear feet of ash sluice
piping. The transformers are located in a curbed gravel containment directed to a 100,000
gallon oil trap tank. The oil trap tank discharges through SW012.
Drainage Area 18 includes approximately 2,000 linear feet of paved access road and 250
linear feet of a paved ash haul road. The area includes 150 linear feet of ash sluice piping
and a gravel switchyard.
Part II Page 8 of 16

Permit No. NCS000546
Table 2. Analytical Monitoring Requirements for Outfalls SW011, Outfall SW012,
and SWO18
Discharge
Measurement
Sample
Sample
Characteristics
Units
Fre uenc 1
Ty e2
Location3
PCBs1
g/1
semi-annuall
Grab
SDO
Copper, Total Recoverable
m L
semi-annual
Grab
SDO
Selenium, Total Recoverable
m L
semi-annual
Grab
SDO
Mercury, Total Recoverable, by
mg/L
semi-annual
Grab
SDO
EPA Method 1631E
Zinc, Total Recoverable
m L
semi-annual
Grab
SDO
Total Suspended Solids TSS
m L
semi-annual
Grab
SDO
Non -Polar Oil &Grease by
semi-annual
Grab
SDO
EPA Method 1664(SGT-HEM)mg/L
pH
standard
semi-annual
Grab
SDO
Total Rainfall4
Rain
inches
semi-annual
-
Gauge
40 CFR Part 423 Appendix A:
semi-annual,
during coal or
Additional Priority Pollutant Metals -
mg/L
ash transport
Grab
SDO
Ag, As, Be, Cd, Cr, Ni, Pb, Sb, TIS
only
Borons
semi-annual,
during coal or
mg/L
ash transport
Grab
SDO
only
Footnotes:
1 Measurement Frequency: Twice per year (unless other provisions of this permit prompt monthly
sampling) during a measureable storm event, until either another permit is issued for this facility or until
this permit is revoked or rescinded. If the facility is monitoring monthly because of Tier Two or Three
response actions under the previous permit, the facility shall continue a monthly monitoring and
reporting schedule in Tier Two or Tier Three status until relieved by the provisions of this permit or
the Division. Monitoring for PCBs may be discontinued after the first year if results are below detection.
2 Grab samples shall be collected within the first 30 minutes of discharge. When physical separation between
outfalls prevents collecting all samples within the first 30 minutes, sampling shall begin within the first 30
minutes, and shall continue until completed.
3 Sample Location: Samples shall be collected at each stormwater discharge outfall (SDO) specified above
unless representative outfall status (ROS) has been granted. The permittee may petition the Director for
ROS using DEMLR's ROS Request Form. DEMLR may grant ROS if stormwater discharges from a single
outfall are representative of discharges from multiple outfalls. Approved ROS will reduce the number of
outfalls where the analytical sampling requirements apply and will be documented in a letter to the
permittee. A copy of the Division's letter granting ROS shall be kept on site.
4 For each sampled measureable storm event, the total precipitation must be recorded. An on-site rain gauge
is required. Where isolated sites are unmanned for extended periods of time, a local rain gauge reading
may be substituted for an on-site reading.
5 These parameters shall be monitored only if coal or coal ash is transported through the drainage
areas of these outfalls during the semi-annual monitoring period in Table 9.
Part II Page 9 of 16

Permit No. NCS000546
Should the permittee identify or create any new stormwater outfalls; remove any
stormwater outfalls identified in this permit; or alter any drainage areas that change
the potential pollutants in runoff discharged through corresponding outfalls, the permittee
will submit a request to NC DEMLR to modify this permit. For any newly discovered pipes
or outfalls, the permittee must evaluate the structure and provide a report of the status and
planned actions to NC DENR within 14 days. The permittee must either (1) request
modification of this permit and modify the SPPP accordingly, or (2) eliminate potential
discharges by removal, plugging, or combination of both.
The permittee shall complete the analytical samplings in accordance with the schedule
specified in Table 4, unless adverse weather conditions prevent sample collection (see
Adverse Weather in Definitions). A minimum of 60 days must separate Period 1 and
Period 2 sample dates, unless monthly monitoring has been instituted under a "Tier Two"
response. Inability to sample because of adverse weather conditions must be documented
in the SPPP and recorded on the DMR. The permittee must report the results from each
sample taken within the monitoring period (see Part III, Section E). However, for purposes
of benchmark comparison and Tiered response actions, the permittee shall use the
analytical results from the first sample with valid results within the monitoring period.
Table 4. Monitoring Schedule
Monitoring period1,2
Sample Number
Start
End
Year 1 - Period 1
1
May 15, 2015
December 31, 2015
Year 1 - Period 2
2
January 1, 2016
June 30, 2016
Year 2 - Period 1
3
July 1, 2016
December 31, 2016
Year 2 - Period 2
4
January 1, 2017
June 30, 2017
Year 3 - Period 1
5
July 1, 2017
December 31, 2017
Year 3 - Period 2
6
January 1, 2018
June 30, 2018
Year 4 - Period 1
7
July 1, 2018
December 31, 2018
Year 4 - Period 2
8
January 1, 2019
June 30, 2019
Year 5 - Period 1
9
July 1, 2019
December 31, 2019
Year 5 - Period 2
10
January 1, 2020
April 30, 2020
Footnotes:
1 Maintain semi-annual monitoring until either another permit is issued for this facility or until this
permit is revoked or rescinded. The permittee must submit an application for renewal of coverage
before the submittal deadline (180 days before expiration) to be considered for renewed coverage
under the permit. The permittee must continue analytical monitoring throughout the permit
renewal process, even if a renewal permit is not issued until after expiration of this permit.
2 If no discharge occurs during the sampling period, the permittee must submit a monitoring report
indicating "No Flow" or "No Discharge" within 30 days of the end of the sampling period.
Failure to monitor semi-annually per permit terms may result in the Division requiring
monthly monitoring for all parameters for a specified time period. "No discharge" from an
outfall during a monitoring period does not constitute failure to monitor, as long as it is
properly recorded and reported.
Part II Page 10 of 16

Permit No. NCS000546
The permittee shall compare monitoring results to the benchmark values in Table 5.
Exceedances of benchmark values require the permittee to increase monitoring, increase
management actions, increase record keeping, and/or install stormwater Best Management
Practices (BMPs) in a tiered program. See below the descriptions of Tier One, Tier Two, and
Tier Three response actions below. In the event that the Division releases the permittee from
continued monthly monitoring and reporting under Tier Two or Tier Three, the Division's
release letter may remain in effect through subsequent reissuance of this permit, unless the
release letter provides for other conditions or duration.
Table 5. Benchmark Values for Analytical Monitoring
Discharge Characteristics
Units
Benchmark
Antimony (Sb), Total Recoverable
mg/L
0.09
Arsenic (As), Total Recoverable
mg/L
0.34
Beryllium (Be), Total Recoverable
mg/L
0.065
Cadmium (Cd), Total Recoverable'
mg/L
0.003
Chromium (Cr), Total Recoverable'
mg/L
0.9
Copper (Cu), Total Recoverable'
mg/L
0.010
Lead (Pb), Total Recoverable'
mg/L
0.075
Mercury (Hg), Total Recoverable2
ng/L
N/A2
Nickel (Ni), Total Recoverable'
mg/L
0.335
Polychlorinated biphenyl compounds (PCBs)
g/L
Detected
Selenium (Se), Total Recoverable
mg/L
0.056
Silver (Ag), Total Recoverable'
mg/L
0.0003
Zinc (Zn), Total Recoverable'
mg/L
0.126
Total Suspended Solids (TSS)
mg/L
100
Non -Polar Oil & Grease by
EPA Method 1664 (SGT -HEM)
mg/L
15
pH3
standard
6-93
Boron (B)
mg/L
N/A (monitor only)
Thallium (Tl), Total Recoverable'
mg/L
N/A (monitor only)
Footnotes:
1 Hardness- dependent. Benchmark based on translation of dissolved value into total recoverable with
an assumed hardness of 25 mg/l and a total suspended solids (TSS) concentration of 10 mg/1.
2 Values above the North Carolina water quality standard for mercury (12 ng/1) should be noted on the
DMR but do not trigger Tier responses. Concentrations infield blanks or method blanks associated
Part II Page 11 of 16

Permit No. NCS000546
with the sample may be subtracted from the results for that sample, as long as all documentation of the
adjustment is provided with the DMR.
If pH values outside this range are recorded in sampled stormwater discharges, but ambient
precipitation pH levels are lower, then the lower threshold of this benchmark range is the pH of the
precipitation (within instrument accuracy) instead of 6 S.U. Readings from an on-site or local rain
gauge (or local precipitation data) must be documented to demonstrate background concentrations
were below the benchmark pH range of 6- 9.
The benchmark values in Table 5 are not permit limits but should be used as guidelines for
implementation of the permittee's SPPP. An exceedance of a stormwater benchmark value
is not a permit violation; however, failure to respond to the exceedance as outlined in this
permit is a violation of permit conditions.
Tier One
If. The first valid sampling results are above a benchmark value, or outside of the benchmark range, for
any parameter at any outfall;
Then: The permittee shall:
1. Conduct a stormwater management inspection of the facility within two weeks of receiving
sampling results.
2. Identify and evaluate possible causes of the benchmark value exceedance.
3. Identify potential, and select the specific feasible: source controls, operational controls, or physical
improvements to reduce concentrations of the parameters of concern, and/or to bring
concentrations within the benchmark range.
4. Implement the selected feasible actions within two months of the inspection.
S. Record each instance of a Tier One response in the SPPP. Include the date and value of the
benchmark exceedence, the inspection date, the personnel conducting the inspection, the selected
actions, and the date the selected actions were implemented.
6. Note: Benchmark exceedances for a different parameter separately trigger a tiered response.
Tier Two
If. The first valid sampling results from two consecutive monitoring periods are above the benchmark
values, or outside of the benchmark range, for any specific parameter at a specific discharge outfall;
Then: The permittee shall:
1. Repeat all the required actions outlined above in Tier One.
2. Immediately institute monthly monitoring and reporting for all parameters. The permittee shall
conduct monthly monitoring at every outfall where a sampling result exceeded the benchmark
value for two consecutive samples. Monthly (analytical and qualitative) monitoring shall continue
until three consecutive sample results are below the benchmark values or within benchmark range.
3. If no discharge occurs during the sampling period, the permittee is required to submit a monthly
monitoring report indicating "No Flow" to comply with reporting requirements.
4. Alternatively, in lieu of steps 2 and 3, the permittee may, after two consecutive exceedances,
exercise the option of contacting the DEMLR Regional Engineer as provided below in Tier Three.
The Regional Engineer may direct the response actions on the part of the permittee as provided in
Tier Three, including reduced or additional sampling parameters or frequency.
S. If pursuing the alternative above after two consecutive exceedances, the permittee may propose an
alternative monitoring plan for approval by the Regional Engineer.
6. Maintain a record of the Tier Two response in the SPPP.
7. Continue Tier Two response obligations throughout the permit renewal process.
Part II Page 12 of 16

Permit No. NCS000546
Tier Three
If: The valid sampling results required for the permit monitoring periods exceed the benchmark
value, or are outside the benchmark range, for any specific parameter at any specific outfall on four
occasions, the permittee shall notify the DEMLR Regional Engineer in writing within 30 days of receipt of
the fourth analytical results;
Then: The Division may but is not limited to:
require that the permittee revise, increase, or decrease the monitoring and reporting frequency for
some or all of the parameters herein;
require sampling of additional or substitute parameters;
require the permittee to install structural stormwater controls;
require the permittee to implement other stormwater control measures;
require the permittee to perform upstream and downstream monitoring to characterize impacts
on receiving waters; or
require the permittee implement site modifications to qualify for a No Exposure Exclusion;
uire the permittee to continue Tier Three obligations through the permit renewal process.
If a Total Maximum Daily Load (TMDL) is developed and approved for this segment of the
Catawba River, or if this body of water becomes impaired, the permittee may be required
to monitor for the pollutant(s) of concern in the future and submit results to the Division.
The Division will consider the monitoring results in determining whether additional BMPs
are needed to control the pollutant(s) of concern to the maximum extent practicable.
If additional BMPs are needed to achieve the required level of control, the permittee will be
required to (1) develop a strategy for implementing appropriate BMPs, and (2) submit a
timetable for incorporation of those BMPs into the Stormwater Pollution Prevention Plan.
SECTION C: QUALITATIVE MONITORING REQUIREMENTS
The purpose of qualitative monitoring is to evaluate the effectiveness of the Stormwater
Pollution Prevention Plan (SPPP) and identify new potential sources of stormwater
pollution. Qualitative monitoring of stormwater outfalls must be performed during a
measurable storm event.
Qualitative monitoring requires a visual inspection of each stormwater outfall regardless of
representative outfall status. Qualitative monitoring shall be performed quarterly as
specified in Table 6, and during required analytical monitoring events (unless the
permittee is required to perform further qualitative monitoring per the Qualitative
Monitoring Response, below).
Inability to monitor because of adverse weather conditions must be documented in the
SPPP and recorded on the Qualitative Monitoring Report form (see Adverse Weather in
Definitions). Only SDOs discharging stormwater associated with industrial activity must be
monitored (See Definitions).
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 SPPP.
Part II Page 13 of 16

Permit No. NCS000546
Table 6. Qualitative Monitoring Requirements
Discharge Characteristics
Frequencyl
Monitoring
Location2
Color
quarterly
SDO
Odor
ly
SDO
Clarity
uarte ly
SDO
Floating Solids
quarterly
SDO
Suspended Solids
quarterly
SDO
Foam
quarterly
SDO
Oil Sheen
quarterly
SDO
Erosion or deposition at the outfall
quarterly
SDO
Other obvious indicators
of stormwater pollution
quarterly
SDO
Footnotes:
1 Monitoring Frequency: Four times per year during a measureable storm event unless other provisions
of this permit prompt monthly monitoring. See Table 7 for schedule of monitoring periods through the
end of this permitting cycle. The permittee must continue qualitative monitoring throughout the permit
renewal process until a new permit is issued.
2 Monitoring Location: Qualitative monitoring shall be performed at each stormwater discharge outfall
(SDO) regardless of representative outfall status.
Part II Page 14 of 16

Permit No. NCS000546
Table 7. Monitoring Schedule
Monitoring period1,2
Sample Number
Start
End
Year 1 - Period 1
1
May 15, 2015
September 30, 2015
Year 1 - Period 2
2
October 1, 2015
December 31, 2015
Year 1 - Period 3
3
January 1, 2016
March 31, 2016
Year 1 - Period 4
4
April 1, 2016
June 30, 2016
Year 2 - Period 1
5
July 1, 2016
September 30, 2016
Year 2 - Period 2
6
October 1, 2016
December 31, 2016
Year 2 - Period 3
7
January 1, 2017
March 31, 2017
Year 2 - Period 4
8
April 1, 2017
June 30, 2017
Year 3 - Period 1
9
July 1, 2017
September 30, 2017
Year 3 - Period 2
10
October 1, 2017
December 31, 2017
Year 3 - Period 3
11
January 1, 2018
March 31, 2018
Year 3 - Period 4
12
April 1, 2018
June 30, 2018
Year 4 - Period 1
13
July 1, 2018
September 30, 2018
Year 4 - Period 2
14
October 1, 2018
December 31, 2018
Year 4 - Period 3
15
January 1, 2019
March 31, 2019
Year 4 - Period 4
16
April 1, 2019
June 30, 2019
Year 5 - Period 1
17
July 1, 2019
September 30, 2019
Year 5 - Period 2
18
October 1, 2019
December 31, 2019
Year 5 - Period 3
19
January 1, 2020
March 31, 2020
Year 5 - Period 4
20
April 1, 2020
April 30, 2020
Footnotes:
1 Maintain quarterly monitoring until either another permit is issued for this facility or until this
permit is revoked or rescinded. The permittee must continue qualitative monitoring throughout the
permit renewal process, even if a renewal permit is not issued until after expiration of this permit.
2 If no discharge occurs during the sampling period, the permittee must complete a monitoring report
indicating "No Flow" or "No Discharge" within 30 days of the end of the sampling period.
Failure to monitor quarterly per permit terms may result in the Division requiring
monthly monitoring for all parameters for a specified time period. "No discharge" from an
outfall during a monitoring period does not constitute failure to monitor, as long as it is
properly recorded.
If the permittee's qualitative monitoring indicates that existing stormwater BMPs are
ineffective, or that significant stormwater contamination is present, the permittee shall
investigate potential causes, evaluate the feasibility of corrective actions, and implement
those corrective actions within 30 days, per the Qualitative Monitoring Response, below.
A written record of the permittee's investigation, evaluation, and response actions shall be
kept in the Stormwater Pollution Prevention Plan.
Part II Page 15 of 16

Permit No. NCS000546
Qualitative Monitoring Response
Qualitative monitoring is for the purposes of evaluating SPPP effectiveness, identifying new potential
sources of stormwater pollution, and prompting the permittee's response to pollution. If the
permittee repeatedly fails to respond effectively to correct problems identified by qualitative
monitoring, or if the discharge causes or contributes to a water quality standard violation, the
Division may but is not limited to:
require that the permittee revise, increase, or decrease the monitoring frequency for some
or all parameters (analytical or qualitative)
require the permittee to install structural stormwater controls;
require the permittee to implement other stormwater control measures;
require the permittee to perform upstream and downstream monitoring to characterize
impacts on receiving waters; or
require the permittee implement site modifications to qualify for a No Exposure Exclusion.
Part II Page 16 of 16

Permit No. NCS000546
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS
SECTION A: COMPLIANCE AND LIABILITY
1. Compliance Schedule
The permittee shall comply with Limitations and Controls specified for stormwater discharges in
accordance with the following schedule:
Existing Facilities already operating but applying for permit coverage for the first time: The
Stormwater Pollution Prevention Plan shall be developed and implemented within 6 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.
New Facilities applying for coverage for the first time: The Stormwater Pollution Prevention Plan
shall be developed and implemented prior to the beginning of discharges from the operation of the
industrial activity and be updated thereafter on an annual basis. Secondary containment, as specified
in Part II, Section A, Paragraph 2(b) of this permit shall be accomplished prior to the beginning of
stormwater discharges from the operation of the industrial activity.
Existing facilities previously permitted and applying for renewal: All requirements, conditions,
limitations, and controls contained in this permit (except new SPPP elements in this permit renewal)
shall become effective immediately upon issuance of this permit. New elements of the Stormwater
Pollution Prevention Plan for this permit renewal shall be developed and implemented within 6
months of the effective date of this permit and updated thereafter on an annual basis. Secondary
containment, as specified in Part II, Paragraph 2 (b) of this permit shall be accomplished prior to the
beginning of stormwater discharges from the operation of the industrial activity.
2. Duty to Comply
The permittee must comply with all conditions of this permit. Any permit noncompliance constitutes
a violation of the Clean Water Act (CWA) and is grounds for enforcement action; for permit
termination, revocation and reissuance, or modification; or denial of a permit upon renewal
application [40 CFR 122.41].
a. The permittee shall comply with standards or prohibitions established under section 307(a) of
the CWA 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 [40 CFR 122.41].
b. The CWA provides that any person who violates section[s] 301, 302, 306, 307, 308, 318 or 405 of
the Act, or any permit condition or limitation implementing any such sections in a permit issued
under section 402, or any requirement imposed in a pretreatment program approved under
sections 402(a)(3) or 402(b)(8) of the Act, is subject to a civil penalty not to exceed $37,500 per
day for each violation [33 USC 1319(d) and 40 CFR 122.41(a)(2)].
c. The CWA provides that any person who negligently violates sections 301, 302, 306, 307, 308,
318, or 405 of the Act, or any condition or limitation implementing any of such sections in a
permit issued under section 402 of the Act, or any requirement imposed in a pretreatment
program approved under section 402(a)(3) or 402(b)(8) of the Act, is subject to criminal
penalties of $2,500 to $25,000 per day of violation, or imprisonment of not more than 1 year, or
both. In the case of a second or subsequent conviction for a negligent violation, a person shall be
subject to criminal penalties of not more than $50,000 per day of violation, or by imprisonment
of not more than 2 years, or both [33 USC 1319(c)(1) and 40 CFR 122.41(a)(2)],
Part III Page 1 of 9

Permit No. NCS000546
d. Any person who knowingly violates such sections, or such conditions or limitations 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. In the case of a second or subsequent conviction for a knowing violation, a person
shall be subject to criminal penalties of not more than $100,000 per day of violation, or
imprisonment of not more than 6 years, or both [33 USC 1319(c)(2) and 40 CFR 122.41(a)(2)].
e. Any person who knowingly violates section 301, 302, 303, 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, and who knows at that time that he thereby places another person in
imminent danger of death or serious bodily injury, shall, upon conviction, be subject to a fine of
not more than $250,000 or imprisonment of not more than 15 years, or both. In the case of a
second or subsequent conviction for a knowing endangerment violation, a person shall be
subject to a fine of not more than $500,000 or by imprisonment of not more than 30 years, or
both. An organization, as defined in section 3 09 (c) (3) (B) (iii) of the CWA, shall, upon conviction
of violating the imminent danger provision, be subject to a fine of not more than $1,000,000 and
can be fined up to $2,000,000 for second or subsequent convictions [40 CFR 122.41(a)(2)].
f. Under state law, a civil penalty of not more than $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 [North Carolina General Statutes § 143-215.6A].
g. Any person may be assessed an administrative penalty by the Administrator for violating section
301, 302, 306, 307, 308, 318 or 405 of this Act, or any permit condition or limitation
implementing any of such sections in a permit issued under section 402 of this Act.
Administrative penalties for Class I violations are not to exceed $16,000 per violation, with the
maximum amount of any Class I penalty assessed not to exceed $37,500. Penalties for Class II
violations are not to exceed $16,000 per day for each day during which the violation continues,
with the maximum amount of any Class II penalty not to exceed $177,500 [33 USC 1319(g)(2)
and 40 CFR 122.41(a)(3)].
3. Duty to Mitigate
The permittee shall take all reasonable steps to minimize or prevent any discharge in violation of this
permit which has a reasonable likelihood of adversely affecting human health or the environment [40
CFR 122.41(d)].
4. Civil and Criminal Liabili
Except as provided in Part III, Section C of this permit regarding bypassing of stormwater control
facilities, nothing in this permit shall be construed to relieve the permittee from any responsibilities,
liabilities, or penalties for noncompliance pursuant to NCGS 143-215.3,143-215.6, 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 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. Property Rights
The issuance of this 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 [40 CFR 122.41(g)].
Part III Page 2 of 9

Permit No. NCS000546
Severability
The provisions of this permit are severable, and if any provision of this permit, or the application of
any provision of this permit to any circumstances, is held invalid, the application of such provision to
other circumstances, and the remainder of this permit, shall not be affected thereby [NCGS 15013-23].
B. Duty to Provide Information
The permittee shall furnish to the Permit Issuing Authority, within a reasonable time, any
information which the Permit Issuing Authority may request to determine whether cause exists for
modifying, revoking and reissuing, or terminating the permit issued pursuant to this permit or to
determine compliance with this permit. The permittee shall also furnish to the Permit Issuing
Authority upon request, copies of records required to be kept by this permit [40 CFR 122.41(h)].
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 permit 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. 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 than
$20,000 per day of violation, or by imprisonment of not more than 4 years, or both [40 CFR 122.41].
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 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 [40 CFR 122.41].
11. Onshore or Offshore Construction
This permit does not authorize or approve the construction of any onshore or offshore physical
structures or facilities or the undertaking of any work in any navigable waters.
12. Duty to Reapply
If the permittee wishes to continue an activity regulated by this permit after the expiration date of
this permit, the permittee must apply for and obtain a new permit [40 CFR 122.41(b)].
k1:11ll9110L1I1-I "30111117:14111170111110to]0V
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, unless permission for a later date has been granted by the Director. (The Director
shall not grant permission for applications to be submitted later than the expiration date of the
existing permit) [40 CFR 122.21(d)]. 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 §143-215.36 and 33 USC 1251 et. seq.
Transfers
This permit is not transferable to any person without prior written notice to and approval from the
Director in accordance with 40 CFR 122.61. The Director may condition approval in accordance with
NCGS 143-215.1, in particular NCGS 143-215.1(b)(4)b.2., and may require modification or revocation
and reissuance of the permit, or a minor modification, to identify the new permittee and incorporate
Part III Page 3 of 9

Permit No. NCS000546
such other requirements as may be necessary under the CWA [40 CFR 122.41(1)(3), 122.611 or state
statute. 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 Permitting Issuing Authority shall be signed
and certified [40 CFR 122.41(k)].
a. All permit applications 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, provided, the manager is
authorized to make management decisions which govern the operation of the regulated
facility including having the explicit or implicit duty of making major capital investment
recommendations, and initiating and directing other comprehensive measures to assure
long term environmental compliance with environmental laws and regulations; the manager
can ensure that the necessary systems are established or actions taken to gather complete
and accurate information for permit application requirements; and where 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 [40 CFR 122.22].
b. All reports required by the permit and other information requested by the Permit Issuing
Authority shall be signed by a person described in paragraph a. 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;
(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 Permit Issuing Authority [40 CFR 122.22].
c. Changes to authorization: If an authorization under paragraph (b) of this section is no longer
accurate because a different individual or position has responsibility for the overall operation of
the facility, a new authorization satisfying the requirements of paragraph (b) of this section must
be submitted to the Director prior to or together with any reports, information, or applications to
be signed by an authorized representative [40 CFR 122.22].
d. Certification. Any person signing a document under paragraphs a. or b. of this section, or
submitting an electronic report (e.g., eDMR), shall make the following certification [40 CFR
122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED:
7 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 forgathering the
Part III Page 4 of 9

Permit No. NCS000546
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 offines and imprisonmentfor knowing violations."
e. Electronic Reports. All electronic reports (e.g., eDMRs) submitted to the Permit Issuing
Authority shall be signed by a person described in paragraph a. above or by a duly authorized
representative of that person as described in paragraph b. A person, and not a position, must be
delegated signatory authority for eDMR or other electronic reporting purposes.
The Permit Issuing Authority may require the permittee to begin reporting monitoring data
electronically during the term of this permit. The permittee may be required to use North
Carolina's Electronic Discharge Monitoring Report (eDMR) internet application for that purpose.
For eDMR submissions, the person signing and submitting the eDMR must obtain an eDMR user
account and login credentials to access the eDMR system.
4. Permit Modification. Revocation and Reissuance, or Termination
The issuance of this permit does not prohibit the Permit Issuing Authority from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the 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 2H.0100; and North Carolina
General Statute 143-215.1 et al.
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 permit condition [40 CFR
122.41(f)].
6. Annual Administering and Compliance Monitoring Fee Requirements
The permittee 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)(2) may cause the Division to initiate action to revoke the permit.
SECTION C: OPERATION AND MAINTENANCE OF POLLUTION CONTROLS
Proper 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 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 permit [40
CFR 122.41(e)].
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
permit [40 CFR 122.41(c)].
3. Bypassing of Stormwater Control Facilities
Bypass is prohibited and the Director may take enforcement action against a permittee for bypass
unless:
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 or dry
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Permit No. NCS000546
weather. This condition is not satisfied 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 measureable
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 Permit Issuing Authority [40 CFR 122.41(j)].
Recording Results
For each measurement or sample taken pursuant to the requirements of this permit, the permittee
shall record the following information [40 CFR 122.41]:
a. The date, exact place, and time of sampling or measurements;
b. The individual(s) who performed the sampling or measurements;
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.
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.
To meet the intent of the monitoring required by this 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. If no approved methods are
determined capable of achieving minimum detection and reporting levels below permit discharge
requirements, then the most sensitive (method with the lowest possible detection and reporting
level) approved method must be used.
5. Representative Outfall
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.
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Permit No. NCS000546
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
o all calibration and maintenance records,
o all original strip chart recordings for continuous monitoring instrumentation,
o copies of all reports required by this permit, including Discharge Monitoring Reports (DMRs)
and eDMR or other electronic DMR report submissions,
o copies of all data used to complete the application for this permit
These records or copies shall be maintained 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 [40 CFR 122.41].
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 storm 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 permit;
b. Have access to and copy, at reasonable times, any records that must be kept under the conditions
of this permit;
c. Inspect at reasonable times any facilities, equipment (including monitoring and control
equipment), practices, or operations regulated or required under this permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring permit compliance or as
otherwise authorized by the Clean Water Act, any substances or parameters at any location [40
CFR 122.41(1)].
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 (DMR) forms provided by the Director or submitted electronically to
the appropriate authority using an approved electronic DMR reporting system (e.g., eDMR). DMR
forms are available on the Division's website (httl2://12ortal.ncdenr.org/web/Ir/npdes-stormwater).
Regardless of the submission method (paper or electronic), submittals shall be delivered to the
Division or appropriate authority no later than 30 days from the date the facility receives the
sampling results from the laboratory.
When no discharge has occurred from the facility during the report period, the permittee is required
to submit a discharge monitoring report, within 30 days of the end of the specified sampling period,
giving all required information and indicating "NO FLOW" as per NCAC T15A 0213 .0506.
If the permittee monitors any pollutant more frequently than required by this permit using test
procedures approved under 40 CFR Part 136 and at a sampling location specified in this permit or
other appropriate instrument governing the discharge, the results of such monitoring shall be
included in the data submitted on the DMR.
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Permit No. NCS000546
The permittee shall record the required qualitative monitoring observations on the SDO Qualitative
Monitoring Report form provided by the Division and shall retain the completed forms on site.
Qualitative monitoring results should not be submitted to the Division, except upon the Division's
specific requirement to do so. Qualitative Monitoring Report forms are available at the website
above.
Submitting Reports
Two signed copies of Discharge Monitoring Reports (DMRs) shall be submitted to:
Central Files
Division of Water Resources
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
The Permit Issuing Authority may require the permittee to begin reporting monitoring data
electronically during the term of this permit. The permittee may be required to use North Carolina's
eDMR internet application for that purpose. Until such time that the state's eDMR application is
compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), permittees will be
required to submit all discharge monitoring data to the state electronically using eDMR and will be
required to complete the eDMR submission by printing, signing, and submitting one signed
original and a copy of the computer printed eDMR to the address above.
Availability of Reports
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 of this permit shall be
available for public inspection at the offices of the Division. 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 permit coincides with a non-stormwater
discharge, the permittee shall separately monitor all parameters as required under all other
applicable discharge permits and provide this information with the 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 [40
CFR 122.41(1)]. This notification requirement includes pollutants which are not specifically listed in
the permit or subject to notification requirements under 40 CFR Part 122.42 (a).
6. Anticipated Noncompliance
The permittee shall give advance notice to the Director of any planned changes at the permitted
facility which may result in noncompliance with the permit [40 CFR 122.41(1)(2)].
7. Sills
The permittee shall report to the local DEMLR Regional Office, within 24 hours, all significant spills
as defined in Part IV of this permit. Additionally, the permittee shall report spills including: any oil
spill of 25 gallons or more, any spill regardless of amount that causes a sheen on surface waters, any
oil spill regardless of amount occurring within 100 feet of surface waters, and any oil spill less than
25 gallons that cannot be cleaned up within 24 hours.
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Permit No. NCS000546
8. Bypass
Notice [40 CFR 122.41(m)(3)1:
a. Anticipated bypass. If the permittee knows 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 effect of the bypass.
b. Unanticipated bypass. The permittee shall submit notice within 24 hours of becoming aware of
an unanticipated bypass.
9. Twentv-four Hour Renortin
a. 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 [40 CFR
122.41(l)(6)].
b. The Director may waive the written report on a case-by-case basis for reports under this section
if the oral report has been received within 24 hours.
c. Occurrences outside normal business hours may also be reported to the Division's Emergency
Response personnel at [phone], [phone] or [phone].
10. Other Noncompliance
The permittee shall report all instances of noncompliance not reported under 24 hour reporting at
the time monitoring reports are submitted [40 CFR 122.41(1)(7)].
11. Other Information
Where the Permittee becomes aware that it failed to submit any relevant facts in a permit
application, or submitted incorrect information in a permit application or in any report to the
Director, it shall promptly submit such facts or information [40 CFR 122.41(1)(8)].
Part III Page 9 of 9

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PART IV DEFINITIONS
1. Act
See Clean Water Act.
Adverse Weather
Adverse conditions are those that are dangerous or create inaccessibility for personnel, such as local
flooding, high winds, or electrical storms, or situations that otherwise make sampling impractical.
When adverse weather conditions prevent the collection of samples during the sample period, the
permittee must take a substitute sample or perform a visual assessment during the next qualifying
storm event. Documentation of an adverse event (with date, time and written narrative) and the
rationale must be included with your SPPP records. Adverse weather does not exempt the permittee
from having to file a monitoring report in accordance with the sampling schedule. Adverse events
and failures to monitor must also be explained and reported on the relevant DMR.
3. Allowable Non-Stormwater Discharges
This permit regulates stormwater discharges. However, non-stormwater discharges which shall be
allowed in the stormwater conveyance system include:
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, or emergency shower or eye
wash as a result of use in the event of an emergency.
4. Best Management Practices (BMPs
I
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. More information on BMPs can be found at:
httl2:Ilcfpub.el2a.gov/nl2des/stormwater/menuofbml2s/index.cfm.
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 Materials
Liquid raw materials, in -process liquids and reactants, intermediate products, manufactured
products, waste materials, or by-products in a single above ground container, tank, or vessel having a
capacity of greater than 660 gallons or contained in multiple above ground containers, tanks, or
vessels located in close proximity to each other having a total combined capacity of greater than
1,320 gallons.
Certificate of Coverage
The Certificate of Coverage (COC) is the cover sheet which accompanies a General Permit upon
issuance and lists the facility name, location, receiving stream, river basin, effective date of coverage
under any General Permit and is signed by the Director.
8. Clean Water Act
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33
USC 1251, et. seq.
9. Division or DEMLR
The Division of Energy, Mineral, and Land Resources, Department of Environment and Natural
Resources.
Part IV Page 1 of 4

10. Director
The Director of the Division of Energy, Mineral, and Land Resources, 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 analyzed (quantitatively
or qualitatively) 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. Measureable Storm Event
A storm event that results in an actual discharge from the permitted site outfall. The previous
measurable storm event must have been at least 72 hours prior. The 72 -hour storm interval may not
apply if the permittee is able to document that a shorter interval is representative for local storm
events during the sampling period, and obtains approval from the local DEMLR Regional Office. Two
copies of this information and a written request letter shall be sent to the local DEMLR Regional
Office. After authorization by the DEMLR Regional Office, a written approval letter must be kept on
site in the permittee's SPPP.
16. Municipal Separate Storm Sewer System (MS41
A stormwater collection system within an incorporated area of local self-government such as a city or
town.
17. No Exposure
A condition of no exposure means that all industrial materials and activities are protected by a storm
resistant shelter or acceptable storage containers to prevent exposure to rain, snow, snowmelt, or
runoff. Industrial materials or activities include, but are not limited to, material handling equipment
or activities, industrial machinery, raw materials, intermediate products, by-products, final products,
or waste products [40 CFR 122.26 (b)(14)]. DEMLR may grant a No Exposure Exclusion from NPDES
Stormwater Permitting requirements only if a facility complies with the terms and conditions
described in 40 CFR §122.26(g).
18. Notice of Intent
The state application form which, when submitted to the Division, officially indicates the facility's
notice of intent to seek coverage under a General Permit.
19. Permit Issuing Authority
The Director of the Division of Energy, Mineral, and Land Resources (see "Director" above).
20. Permittee
The owner or operator issued this permit.
21. 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.
Part IV Page 2 of 4 Pages

22. Representative 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 Division may grant representative outfall status. Representative outfall
status allows the permittee to perform analytical monitoring at a reduced number of outfalls.
23. Secondary Containment
Spill containment for the contents of the single largest tank within the containment structure plus
sufficient freeboard to contain the 25 -year, 24-hour storm event.
24. Section 313 Water Priority Chemical
A chemical or chemical category which:
b. 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;
c. Is present at or above threshold levels at a facility subject to SARA title III, Section 313 reporting
requirements; and
d. Meets at least one of the following criteria:
i. Is listed in appendix D of 40 CFR part 122 on Table II (organic priority pollutants), Table
III (certain metals, cyanides, and phenols) or Table IV (certain toxic pollutants and
hazardous substances);
ii. Is listed as a hazardous substance pursuant to section 311(b)(2)(A) of the CWA at 40 CFR
116.4; or
iii. Is a pollutant for which EPA has published acute or chronic water quality criteria.
25. Severe Property Damage
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.
26. 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.
27. 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 110.3and 40 CFR 117.3) or section
102 of CERCLA (Ref: 40 CFR 302.4).
28. Stormwater Discharge Outfall (SDO)
The point of departure of stormwater from a discernible, confined, or discrete conveyance, including
but not limited to, storm sewer pipes, drainage ditches, channels, spillways, or channelized collection
areas, from which stormwater flows directly or indirectly into waters of the State of North Carolina.
29. Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following rainfall
or as a result of snowmelt.
Part IV Page 3 of 4 Pages

30. 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.
31. 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.
32. Total Maximum Daily Load (TMDLI
TMDLs are written plans for attaining and maintaining water quality standards, in all seasons, for a
specific water body and pollutant. A list of approved TMDLs for the state of North Carolina can be
found at http://portal.ncdenr.org/web/wq/ps/mtu/tmdl.
33. Toxic Pollutant
Any pollutant listed as toxic under Section 307(a)(1) of the Clean Water Act.
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.
Part IV Page 4 of 4 Pages