Riverbend Steam Station (6)

A 14-A
NCNIR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Mark McGary
Senior Engineer
Duke Energy Carolinas, LLC
P.O. Box 1006, Mail Code EC13K
Charlotte, North Carolina 28201
Dear Mr McGary.
Division of Water Quality
Coleen H Sullins
Director
July 19, 2011
Subject. Draft NPDES Stormwater Permit
Permit No. NCS000549
Dee Freeman
Secretary
Duke Energy Carolinas, LLC - Riverbend
Steam Station
Gaston County
Enclosed with this letter is a copy of the draft NPDES stormwater permit for your facility. Please review the
draft permit very carefully to ensure thorough understanding of the conditions and requirements it
contains.
Please submit any comments to me no later than thirty (30) days following your receipt of the draft
Comments should be sent to the address listed at the bottom of this page If no adverse comments are
received from the public or from you, this permit will likely be issued in about two months
With its application, the company requested representative outfall status (ROS) for two stormwater
discharge outfalls. The Mooresville Regional Office has recommended approval with some modifications as
discussed with you at the site visit on June 22, 2011. The recommendations include approval of ROS for
SW001, SW002, and SW006 (instead of SW004). Based on the site visit, outfalls SW004, SW010, SWO11,
and SW012 will not be monitored since they are not part of the industrial activities that occur on the site
The draft permit reflects the Region's recommendations and acknowledges that a change in ROS may result
depending on results Since ROS is typically handled outside of the permit, changes may not require a
permit modification. The Division will also document final ROS approval in the cover letter of the issued
permit
If you have any questions or comments concerning this draft permit, please contact me at (919) 807 -6375
or robert patterson @ncdenr.gov.
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699 -1617
Location 512 N Salisbury St Raleigh, North Carolina 27604
Phone [phone] FAX 919 - 807 -64941 Customer Service 1- 877 -623 -6748
Internet www ncwaterquality org
An Equal Opportunity 1 Affirmative Action Employer
NorthCarohna
1, xiturally

Mr M McGary
Duke Energy Carolinas, LLC - Riverbend Steam Station
Permit No NCS000549
July 19, 2011
Page 2
Sincerely,
Robert D. Patterson, PE
Environmental Engineer
Stormwater Permitting Unit
cc: Mooresville Regional Office, Water Quality Section (w /attachment)/ M Parker
Stormwater Permitting Unit
Attachments
2

Permit No NCS000549
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE STORMWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE El
NATION SYSTEM
end Steam Station
Steam Plant Road
Mount Holly, NC
Gaston County
to receiving waters designated as the Catawba River (Mountain Island Lake), class WS -IV, B;
CA class stream in the Catawba River Basin, in accordance with the discharge limitations,
monitoring requirements, and other conditions set forth in Parts I, I1, II1, IV, V and VI hereof.
!Vote Draft Permit Dates are Approximate
This permit shall become effective October 1, 2011.
This permit and the authorization to discharge shall expire at midnight on September 30, 2016.
Signed this the 12th day of September, 2011.
for Coleen H. Sullins, Director
Division of Water Quality
By the Authority of the Environmental Management Commission

PART
Section A;
Section B:
Section C.
PART II
Section A:
Section B:
Section C:
Section D:
TABLE OF CONTENTS
INTRODUCTION
Individual Permit Coverage
Permitted Activities
Location P
MONITORIN
DISCHARGE
Stormwatf
Analytical
Qualitative
On -Site V
Permit No NCS000549
PERMITTED
PART III STANDARD CTIONS FOR NPDES STORMWATER INDIVIDUAL
PERMITS
Section A: Compliance
and Liability
I .
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
2.
Transfers
i

Permit No NCS000549
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 Fpcil}O
Section D: Monitoring and Records
1.
Representative Sampling
2.
Recording Results
3.
Flow Measurements
4.
Test Procedures
5.
Representative fal
6.
Recor e n
7.
Inspecti an n
Section E: Reporting
uireme s
1.
Di ch onitoring Reports
2.
Submi mg Reports
3.
Availability of Reports
4
Non - Stormwater Discharges
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
PART VI DEFINITIONS
ii

Permit No NCS000549
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 Excl sion from NPDES stormwater
discharge permit requirements. Any owner or operator wiV,*I- n a No Exposure
Certificatio n must submit a No Exposure Certificatio O Division; must receive
approval by the Division; must maintain no exposur co authorized to discharge
under a valid NPDES stormwater permit; and must r appl xposure Exclusion once
every five (5) years.
SECTION B: PERMITTED A
Until this permit expires or is ie or xevo`lc"a� the permittee is authorized to discharge
stormwater to the surface waters rt Ca olina or separate storm sewer system that has been
adequately treated and managed ' a e with the terms and conditions of this individual
permit. All stormwater disch ges sha • in accordance with the conditions of this permit.
Any other point source disc urface waters of the state is prohibited unless it is an
allowable non- stormwater di - ge or is covered by another permit, authorization, or approval.
The stormwater discharges allowed by this individual 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

SECTION C: LOCATION MAP
Permit No NCS000549
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NCS000549
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Duke Energy Carolinas, LLC
Riverbend Steam Station
Latitude 350 21' 40" N
Longitude' 800 58' 32" W
C01.111ty: Gaston
Receiving Stream. Catawba River (Mountain Island Lake)
Stream Class: WS-IV, B; CA
Index No, 11-(114)
Sub -basin 03-08-33 (Catawba River Basin)
Part I Page 2 of 2
Facility Location

Permit No NCS000549
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 I11, 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 , ysical facility and the
potential pollutant sources which may be expect d t tribute to contamination of
stormwater discharges. The site plan shall co in t fI111 wi
(a) A general location map (USGS quadr , ap or appropriately drafted
equivalent map), showing the facilit s to ati 6 in relation to transportation
routes and surface waters, the n , o� he r eiving water(s) to which the
stormwater outfall(s) discharg , o e ischarge is to a municipal separate
storm sewer system, the na of e nicipality and the ultimate receiving
waters, and accur e lati an . itude of the point(s) of discharge. The
general locatio a (o t a ' ely the site map) shall identify whether each
receiving water is 're the state's 303(d) list of impaired waters) or is
located in a wat s e 10 w ich a TMDL has been established, and what the
parameter(s) conce e.
North Carol*, Vs 303 List can be found here:
http: //h2o.e sta�nc.us /tmdl/General 303d.htm #Downloads
North Carolina DL documents can be found here
http: //h2o.enr.state.nc.us /tmdl/TMDL list.htm #Final TMDLs.
(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 which
could be expected to be present in the stormwater discharge from each outfall.
(c) A site map drawn to scale (including a distance legend) showing: 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, all drainage features and structures, drainage areas for each outfall,
direction of flow in each drainage area, industrial activities occurring in each
drainage area, buildings, existing BMPs, and impervious surfaces. The site map
must indicate the percentage of each drainage area that is impervious.
(d) A list of significant spills or leaks of pollutants that have occurred at the facility
during the three (3) previous years and any corrective actions taken to mitigate
spill impacts.
Part 11 Page 1 of 1 1

Permit No NCS000549
(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. The permittee shall re- certify annually that the stormwater
outfalls have been evaluated for the presence of non - stormwater discharges.
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
nonstructural measures. The stormwater management plan, at a minimum, shall
incorporate the following:
(a) Feasibility Study. A review of the tei
the methods of operations and /or stor
of materials and processes to stormw,
prevent exposure of all storage areas,
manufacturing or fueling operatio
not practical, the stormwater m ag
diverting the stormwater run a y
I d ono 'c feasibility of changing
ti s t x urinate or reduce exposure
herev practical, the permittee shall
Akhandling operations, and
here elimination of exposure is
An shall document the feasibility of
areas of potential contamination.
(b) Secondary Cont ' ent 0 1 irer is and Records. Secondary containment is
required for: b ae r -id materials; storage in any amount of Section
313 of Title III of up d Amendments and Reauthorization Act (SARA)
water priority c micals- storage in any amount of hazardous substances, in
order to prev leaks d spills from contaminating stormwater runoff. A table
or summary a tanks and stored materials and their associated secondary
containment a all be maintained. 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 closed 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 listing of site structural and non - structural Best Management
Practices (BMP) 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 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 shall be reviewed and updated annually.
Part II Page 2 of 1 1

Permit No NCS000549
3. 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 the team) 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 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, an oil Spill
Prevention Control and Countermeasure plan (SPCC) 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 House
maintenance and good housekeeping progn
all stormwater control systems, stormwater
surface waters and wetlands, industrial acti
material handling areas, disposal areas,
haul roads), all drainage features and st
program shall establish schedul4arq 4.
activities of stormwater control
facility systems that pre %fi-
Inspection of material hbe inc orporated into the
inspections, maintenance, and
in the SPPP. I
preventative
d. The program shall list
all on -site and adjacent
K a including material storage areas,
Lre oading and unloading areas, and
&existing structural BMPs The
fo , maintenance, and housekeeping
W®1 as facility equipment, facility areas, and
rmwater exposure or stormwater pollution
regular cleaning schedules of these areas sball
compliance with the established schedules for
ing shall be recorded in writing and maintained
5. Employee Training Ong 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. Facility personnel (or team)
responsible for implementing the training shall be identified, and their annual training
shall be documented by the signature of each employee trained.
6. Responsible Party. The Stormwater Pollution Prevention Plan shall identify a specific
position(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 permittee shall amend the Plan whenever there is a change in
design, construction, operation, or maintenance which has a significant effect on the
potential for the discharge of pollutants to surface waters. All aspects of the Stormwater
Pollution Prevention Plan shall be reviewed and updated on an annual basis. The annual
update shall include an updated list of significant spills or leaks of pollutants for the
previous three years, or the notation that no spills have occurred. The annual update shall
include re- certification that the stormwater outfalls have been evaluated for the presence
of non - stormwater discharges. Each annual update shall include a re- evaluation of the
Part II Page 3 of 11

Permit No NCS000549
effectiveness of the BMPs listed in the BMP Summary of the Stormwater Management
Plan.
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 5) to the Director that the changes
have been made
8. Facility Inspections. Inspections of the facility and all stormwater systems shall occur as
part of the Preventative Maintenance and Good Housekee ing Program at a minimum on
a semi - annual schedule, once during the first half of ar (January to June), and once
during the second half (July to December), wit 1
it 0 days eparating inspection
dates (unless performed more frequently than em' nn 11► These facility inspections
are different from, and in addition to, the sto w er disc ge characteristic monitoring
required in Part II B, C and D of this permit.
9 Implementation The permittee shall i
shall include documentation of all rnk
activities, and training provided t2 67
of actions taken to imnleM,%t
vehicle maintenan4
five years and mad
immediately upon
t Ll - Ian. Implementation of the Plan
,, easurements, inspections, maintenance
f including the log of the sampling data and
ed with the industrial activities, including
ntation shall be kept on -site for a period of
or the Director's authorized representative
Part 11 Page 4 of 11

I' - ri1Tli2[oizWIGGINT.,lr]
SECTION B: ANALYTICAL MONITORING REQUIREMENTS
Analytical monitoring of stormwater discharges shall be performed as specified in Table 1. All
analytical monitoring shall be performed during a representative storm event. The required
monitoring will result in a minimum of ten analytical samplings being conducted over the term of
the permit at each stormwater discharge outfall (SDO).
A representative storm event is a storm event that measures greater than 0 l inches of rainfall. The
time between this storm event and the previous storm event measuring greater than 0 1 inches must be at
least 72 hours. A single storm event may have a period of no precipitation of up to 10 hours. For
example, if it rains but stops before producing any collectable discharge, a sample may be collected if the
next rain producing a discharge beizins within 10 hours.
Table 1. Analvtical M
is
40 CFR Part 423 Appendix A:
13 Priority Pollutant Metals
(Ag, As, Be, Cd, Cr, Cu, Hg,
Ni, Pb, Sb, Se, TI, Zn) 4
µg /l
e
Grab
SDO
Al
&gIPGL
i- annual
Grab
SDO
B
ImakaftL 11
semi-annual
Grab
SDO
COD
mg
semi - annual
Grab
SDO
TSS
in
semi - annual
Grab
SDO
Sulfate
. g/1
semi - annual
Grab
SDO
Oil and Grease (O &G)
mg /l
semi - annual
Grab
SDO
H
standard
semi- annual
Grab
SDO
Total Rainfalls
inches
semi - annual
Rain Gauge
-
Footnotes
i Measurement Frequency Twice per year during a representative storm event, for each year until either another
permit is issued for this facility or until this permit is revoked or rescinded If at the end of this permitting cycle
the perm►ttee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the
perm►ttee will be considered for a renewal application The applicant must continue semi- annual monitoring until
the renewed permit is issued See Table 2 for schedule of monitoring periods through the end of this permitting
cycle
2 If the stormwater runoff is controlled by a stormwater detention pond, a grab sample of the discharge from the
pond shall be collected within the first 30 minutes of discharge
3 Sample Location Samples shall be collected at each stormwater discharge outfall (SDO) unless representative
outfall status has been granted
4 Mercury shall be analyzed by EPA Low -level detection method 1631 E This method also requires a field blank
be analyzed A benchmark does not apply, however, values above 0.012 pg /l should be noted on annual SDO
DMR reports to the Regional Office
5 For each sampled representative storm event the total precipitation must be recorded An on -site rain gauge or
local rain gauge reading must be recorded
Part II Page 5 of I I

Permit No NCS000549
The permittee shall complete the minimum ten analytical samplings in accordance with the
schedule specified below in Table 2 A minimum of 60 days must separate each sample date
unless monthly monitoring has been instituted under a Tier Two response.
Table 2. Monitoring Schedule
- °Monitorin " period '
Sample Number,
T r �t Start
1. End w.
Year 1 — Period 1
1
October 1, 2011
December 31, 2011
Year 1 — Period 2
2
January 1, 2012
June 30, 2012
Year 2 — Period 1
3
July 1, 2012
December 31, 2012
Year 2 — Period 2
4
January 1, 2013
June 30, 2013
Year 3 — Period 1
5
July 1,
December 31, 2013
Year 3— Period 2
6
J ~2 4
& June 30, 2014
Year 4 — Period 1
7
1 y, 20 . `'
December 31, 2014
Year 4 — Period 2
8
Jarjia4, 2015
June 30, 2015
Year 5 — Period 1
9
ly ;215
December 31, 2015
Year 5 — Period 2
10
u , 2016 1
June 30, 2016
Footnotes
1 Maintain semi- annual monitoring jdang p1pler ren cess The applicant must continue semi- annual
monitoring until the renewed pe s2 If no discharge occurs during thAhampplieng r►nittee must submit a monitoring report indu ating "No
Flow" within 30 days of the end period
The permittee shall report t al ' 1 results from the first sample with valid results within the
monitoring period. In addit separate signed Annual Summary DMR copy shall be
submitted to the local DWQ Regional Office (RO) by March 1 of each year. The permittee
shall compare monitoring results to the benchmark values in Table 3. The benchmark values in
Table 3 are not permit limits but should be used as guidelines for the permittee's Stormwater
Pollution Prevention Plan (SPPP). EYceedences 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 and Tier Two.
Part 11 Page 6 of 11

Permit No NCS000549
Table 3. Benchmark Values for Analvtical Monitorin
IDischarge Characteristi�cs,A
Ft Units
B,enchmark'a
Aluminum
mg /l
0.75
Antimony
mg /l
0.09
Arsenic
mg /l
0.36
Beryllium
mg /l
0.07
Boron
mg /l
N/A
Cadmium
mg /l
0.001
Chromium
mg /1
Copper
mg /1
A&
Lead
mg /l
Lzsi;�
Mercury
µg /1
OOW N/A
Nickel
mg /1
0.26
Selenium
mg/Lf
0.056
Silver
AW' AL
14, Mo
0 001
Thallium
N/A
Zinc
1
0.067
COD
mg/1 I
120
TSS
mg /l
100
Sulfate
mg /l
500
O &G
mg /l
30
pH (see footnote 1)
standard
6 - 9
Footnotes
1 If pH values outside this range are recorded in sampled stormwater discharges, but ambient rainfall data
indicate precipitation pH levels are within + 0.1 standard units of the measured discharge values or
lower, then the lower threshold of this benchmark range does not apply 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
Part 11 Page 7 of 11

Permit No NCS000549
�°� •�° nom_ �- ;�- �a;��- �Te>rOne�, � �;, ,:�.��.r- ,�e�T,�.���; ^_�
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 exceedence.
3. Identify potential, and select the specific: source controls, operational controls, or physical
improvements to reduce concentrations of the parame rs concern, or to bring
concentrations to within the benchmark range.
4. Implement the selected actions within two mo f th 'ns ection.
5. Record each instance of a Tier One response i rmwater Pollution Prevention Plan.
Include the date and value of the benchmar ex, ed - , the inspection date, the personnel
conducting the inspection, the selected do e date the selected actions were
implemented.
If: During the term of this pe , t, the fi alid sampling results from two consecutive
monitoring periods are a o the nchmark values, or outside of the benchmark range, for any
specific parameter at a spec Is outfall;
Then: The permittee shall:
1. Repeat all the required actions outlined above in Tier One.
2. Immediately institute monthly monitoring for all pararrieters (except mercury) 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 the benchmark range, for all
parameters at that outfall.
3. If no discharge occurs during the sampling period, the permittee is required to submit a
monthly monitoring report indicating "No Flow."
4. Maintain a record of the Tier Two response in the Stormwater Pollution Prevention Plan.
Part 11 Page 8 of 11

Permit No NCS000549
During the term of this permit, 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 DWQ
Mooresville Regional Office Supervisor in writing within 30 days of receipt of the fourth
analytical results. D WQ may, but is not limited to:
• Require that the permittee increase or decrease the monitoring frequency for the
remainder of the permit;
• Work with the permittee to develop alternatiW'' a rate es;
• Require the permittee to install structural sto cont�ol-s;
• Require the permittee to implement other st control measures; or
• Require that the permittee implement s s to qualify for the No Exposure
Exclusion.
This site discharges to the Cata I've w 'ch is impaired for low pH. If a Total Maximum
Daily Load (TMDL) is approved thi e ent of the river, the Division may require
additional monitoring for this tal (c , ,e ly part of the permit) or consider routine sample
results in determining wheth additio _l MPs are needed to control the pollutant(s) of concern
to the maximum extent vrac 51 ble.
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 permitted Stormwater Pollution Prevention Plan
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 in Table 4, during the analytical
monitoring event. [If analytical monitoring is not required, the permittee still must conduct semi-
annual qualitative monitoring.] Qualitative monitoring is for the purpose of evaluating the
effectiveness of the Stormwater Pollution Prevention Plan (SPPP) and assessing new sources of
stormwater pollution.
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 9 of 1 1

Table 4. Oualitative MonitorinLy Requirements
Color
semi - annual
SDO
Odor
semi - annual
SDO
Clarity
semi - annual
SDO
Floating Solids
semi - annual
SDO
Suspended Solids
semi - annual
SDO
Foam
semi - annual
SDO
Oil Sheen
semi - annual
silo
Erosion or deposition at the
semi - annual
OO
outfall
Other obvious indicators
semi - annual
&DO
of stormwater pollution
Footnotes
1 Measurement Frequency Twice per year during
permit is issued for this facility or until this pe
the permittee has submitted the appr riate
permttee will be considered fora ae I a li�c
othe renew ed permit is issued See "Ta r
cycle
2 Monitoring Location Qualitativ oniton s
regardless of representative out 1 status
Permit No NCS000549
tat storm event, for each year until either another
ke r rescinded If at the end of this permitting cycle
OWTIenewal permit before the submittal deadline, the
The applicant must continue semi- annual monitoring until
of monitoring periods through the end of this permitting
be performed at each stormwater discharge outfall (SDO)
SECTION D: ON -SITE VEHICLE MAINTENANCE MONITORING REQUIREMENTS
Facilities which have any vehicle maintenance activity occurring on -site which uses more than 55
gallons of new motor oil per month when averaged over the calendar year shall perform
analytical monitoring as specified below in Table 5. This monitoring shall be performed at all
stormwater discharge outfalls which discharge stormwater runoff from vehicle maintenance areas
and in accordance with the schedule presented in Table 2 (Section B). All analytical monitoring
shall be performed during a representative storm event
Part II Page 10 of 11

Permit No NCS000549
Table 5. Analvtical Monitorinif Reauirements for On -Site Vehicle Maintenance
�I)'ischarge Charaeteris�ties
rrztt. ��� ,tom,
Units
Measurement
Fare ugnc� t
Sample
T e2
Sample
Location3
pH
standard
semi - annual
Grab
SDO
Total Petroleum Hydrocarbons
EPA Method 1664 (SGT -HEM
mg /l
semi - annual
Grab
SDO
Total Suspended Solids
I mg /l
semi - annual
Grab
SDO
Total Rainfall4
inches
semi - annual
Rain gauge
New Motor Oil Usage
gallons /month
semi - annual
Estimate
-
Footnotes
I Measurement Frequency Twice per year during a representa
permit is issued for this facility or until this permit is revoked
the permittee has submitted the appropriate paperwork for a
permittee will be considered for a renewal application The i
the renewed permit is issued See Table 2 for schedule of m�
cycle
2 If the stormwater runoff is controlled by a stormwater AMU
10, Be
pond shall be collected within the first 30 minutes o isc
3 Sample Location Samples shall be collected at st w
stormwater runoff from area(s) where vehicle ten a a'
4 For each sampled representative st , ve th otal r pr
gauge reading must be recorded
it, for each year until either another
If at the end of this permitting cycle
E3efojfthe submittal deadline, the
mue semi - annual monitoring until
s through the end of this permitting
,pon3ra grab sample of the discharge from the
rWn the pond
r discharge outfall (SDO) that discharges
sties occur
on must be recorded An on -site or local rain
Monitoring results shall be c pared tb7the benchmark values in Table 6. The benchmark
values in Table 6 are not pe , t lim' but should be used as guidelines for the permittee's
Storr�z�ater Pollution Preve an (SPPP). Eaceedences of benchmark values rewire the
permittee to increase monitoring, increase management actions, increase record keeping, and /or
install stormwater Best Management Practices (BMPs), as provided in Part II Section B.
Table 6. Benchmark Values for Vehicle Maintenance Analvtical Moni
Discharge CharacteristicsUnitsa 4 e Benchmark.
pH (see footnote 1) standard 6 - 91
Total Petroleum Hydrocarbons (TPH) mg /L 15
Total Suspended Solids mg /L 100
toring
Footnotes
1 If pH values outside this range are recorded in sampled stormwater discharges, but ambient rainfall data
indicate precipitation pH levels are within + 0.1 standard units of the measured values or lower, then the
lower threshold of this benchmark range does not apply Readings from an on -site or local rain gauge (or local
precipitation data) must be documented to demonstrate background concentrations were below the normal pH
range
Part 11 Page 11 of 11

Permit No NCS000549
PART iII STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS
SECTION A: COMPLIANCE AND LIABILITY
ComDllance 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 12 months of the effective date of the
initial permit and updated thereafter on an annual basis Secondary containment, as specified in Part 11,
Section A, Paragraph 2(b) of this permit, shall be accomplished withiji>12 months of the effective date of
the initial permit issuance
New Facilities applying for coverage for the fi4�eg in aci previously permitted and
applying for renewal under this permit The Sttion Pr ion Plan shall be developed and
implemented prior to the beginning of dischar ation of the industrial activity and be
updated thereafter on an annual basis Secondt, a pecified in Part 11, Section A, Paragraph
2(b) of this permit shall be accomplished prior f discharges from the operation of the
i ndustrial activity
Dutv to ComDly _ lid -&
ov
The permittee must comply wi I on ' .ioktr' f this individual permit Any permit noncompliance
constitutes a violation of the Cl a r d i s grounds for enforcement action, for permit
termination, revocation and ssuanc or odification, or denial of a permit upon renewal application
The permittee s 1 compKollutants , ith standards or prohibitions established under section 307(a) of the
Clean Water A' fo within the time provided in the regulations that establish these
standards or prolh ns, 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 $25,000 per day for each violation Any person who negligently violates any
permit condition is subject to criminal penalties of $2,500 to 25,000 per day of violation, or
imprisonment for not more than I 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 $10,000 per violation with the maximum
amount not to exceed $125,000 [Ref Section 309 of the Federal Act 33 USC 1319 and 40 CFR
122 41(a) ]
Under state law, a daily civil penalty of not more than ten thousand dollars ($10,000) 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 NC General Statutes 143 -215 6A]
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 $10,000 per violation, with the maximum amount of any Class I
penalty assessed not to exceed $25,000 Penalties for Class I1 violations are not to exceed
Part I li Page 1 of 8

Permit No NCS000549
$10,000 per day for each day during which the violation continues, with the maximum amount of
any Class Il penalty not to exceed $125,000
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
Civil and Criminal Liability
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 resp t ity for effective compliance may be
temporarily suspended
Oil and Hazardous Substance Liability
Nothing in this individual permit shall be construed ecl a institution of any legal action or relieve
the permittee from any responsibilities, liabilities . en ies which the permittee is or may be subject to
under NCGS 143 -215 75 et seq or Section 311 - th e era Act, 33 USC 1321
Property Rights
The issuance of this mdividua e, do It convey any property rights in either real or personal
property, or any exclusive privi es, n d it authorize any injury to private property or any invasion of
personal rights, nor any mfri e era[, State or local laws or regulations
Severability
The provisions of this indi 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
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
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 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 that $20,000 per day of
violation, or by imprisonment of not more than 4 years, or both
Part III Page 2 of 8

Permit No NCS000549
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
Individual Permit Expiration
The permittee is not authorized to discharge after the expiration date n order to receive automatic
authorization to discharge beyond the expiration date, the a all submit forms and fees as are
required by the agency authorized to issue permits no la ha 180 ays pri to the expiration date Any
permittee that has not requested renewal at least 180 d s pr to p' , or any permittee that does not
have a permit after the expiration and has not requeste re wal at le 0 days prior to expiration, will be
subjected to enforcement procedures as provided in N § 43 -215 6 and 33 USC 1251 et seq
Transfers
This permit is not transferable to any perso ce afte otice to and approval by the Director The
Director may require modification or revo do a suance of the permit to change the name and
incorporate such other requir, ketsa,. ma, be ary under the Clean Water Act The Permittee is
required to notifv the Divisiit he event the permitted facility is sold or closed.
Signatory Requirements
All applications, reports, Mr informagn submitted to the Director shall be signed and certified
All applications hovered under this individual permit shall be signed as follows
(1) In the case of a corporation by a principal executive officer of at least the level of vice -
president, or his duly authorized representative, if such representative is responsible for
the overall operation of the facility from which the discharge described in the permit
application form originates,
(2) In the case of a partnership or limited partnership by a general partner,
(3) in the case of a sole proprietorship by the proprietor,
(4) in the case of a municipal, state, or other public entity by a principal executive officer,
ranking elected official, or other duly authorized employee
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,
(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
Part III Page 3 of 8

Permit No NCS000549
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
Any person signing a document under paragraphs a or b of this section shall make the following
certification
"1 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 owledge and belief, true, accurate,
and complete I am aware that there are significant pe for submitting false information,
including the possib►lity of fines and imprisonr> xt fo o ng vio,Jptions "
The issuance of this individual permit does not
individual permit, revoking and reissuing the it
allowed by the laws, rules, and regulations co
and 123, Title 15A of the North Carolina A
General Statute 143 -215 1 et al
Permit Actions
The permit may be mod
changes or anticipated r
SECTION C: OPERATION
2
Proper Operation and Maintenance
�r from reopening and modifying the
or terminating the individual permit as
, Code of Federal Regulations, Parts 122
Subchapter 2H 0100, and North Carolina
or terminated for cause The notification of planned
not stay any individual permit condition
NANCE OF POLLUTION CONTROLS
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 opei ation 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
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
Bypassing of Stormwater Control Facilities
Bypass is prohibited and the Director may take enforcement action against a permittee for bypass unless
Bypass was unavoidable to prevent loss of life, personal injury or severe property damage, and
Part iiI Page 4 of 8

Permit No NCS000549
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
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
I Representative Sampling
Samples collected and measurements taken, as require ere , sh be racterist►c of the volume and
nature of the permitted discharge Analytical sampling h be per during a representative storm
event Samples shall betaken on a day and time that is a rist►c of the discharge All samples shall be
taken before the discharge loins or is diluted by any r w to s earn, body of water, or substance
Monitoring points as specified in this permit sha be an without notification to and approval of
the Director
2 Recording Results
For each measurement, sample, ' cti r a►ntenance activity performed or collected pursuant to the
requirements of this individual t, e er►ittee shall record the following information
a The date, exact p e, and t► f sampling, measurements, inspection or maintenance activity,
b The individual( ormed 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
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
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 NCS000549
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
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 oatfalls
Records Retention
Visual monitoring shall be documented and records maintained at
Pollution Prevention Plan Copies of analytical monitorin res
permittee shall retain records of all monitoring mformat , me c
records and all original strip chart recordings for conti ous ni
reports required by this individual permit for a period a ast 5
measurement, report or application This period may b to ed
Inspection and Entry
The permittee shall allow the Director, Za acting as a representative of the Directseparate storm sewer system, uuth
sewer system receiving the
required by law, to,
,ility along with the Stormwater
also be maintained on -site The
and maintenance
aon, and copies of all
yeMWom the date of the sample,
by request of the Director at any time
Sized 'fepresentative (including an authorized contractor
c aaFof a facility which discharges through a municipal
ative of a municipal operator or the separate storm
sentation of credentials and other documents as may be
a Enter upon the p ittee's pr6fiiises where a regulated facility or activity is located or conducted,
or where record ust be t under the conditions of this individual permit,
b Have access to an y, 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 tunes, 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
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 Submittals shall be delivered to the
Division 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 withm 30 days of the end of the three -month sampling period, giving
all required information and indicating "NO FLOW" as per NCAC T15A 02B 0506
Part IIi Page 6 of 8

Permit No NCS000549
The permittee shall record the required qualitative monitoring observations on the SDO Qualitative
Monitoring Report (QMR) 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 DWQ's specific
requirement to do so
Submitting Reports
Duplicate signed copies of all reports required herein, shall be submitted to the following address
Division of Water Quality
Surface Water Protection Section
ATTENTION Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699 -1617
In addition, a separate signed Annual Summary DMR c shy be submitte to the permrttee's DWQ
Regional Office (RO) by March 1 of each year
Availabili . of Reports
Except for data determined to be confidential un C 14 15 3(a)(2) or Section 308 of the Federal
Act, 33 USC 1318, all reports prepared in acco an terms shall be available for public inspection
at the offices of the Division of Water Qual f A equ by the Act, analytical data shall not be
considered confidential Knowingly make any Ise atement on any such report may result in the
imposition of criminal penalti pr for GS 143 -215 6B or in Section 309 of the Federal Act
Non - Stormwater Discharges
If the storm event monitor in actor e with this individual permit coincides with a non - stormwater
discharge, the permittee s I separa y monitor all parameters as required under the non - stormwater
discharge permit and pro ,'d ormation with the stormwater discharge monitoring report
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 CFR Part 122 42 (a)
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
Bypass
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 affect of the bypass
b Unanticipated bypass The permittee shall submit notice within 24 hours of becoming aware of an
unanticipated bypass
Part 111 Page 7 of 8

10
Permit No NCS000549
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 plarmed 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 &
Other Noncompliance
The permittee shall report all instances of noncompl
monitoring reports are submitted
Other Information
Where the permittee becomes aware that it
individual permit or m any report to the DI
24 hour reporting at the time
iit any relevant facts in an application for an
promptly submit such facts or information
Part III Page 8 of 8

Permit No NCS000549
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
Act then applicable
PART V ADMINISTERING AND
REQUiVIA�
other requirements in the
E MONITORING FEE
The permittee must pay the administering and co iand<�ormg fee within 30 ( ±hirty) days after being billed by
the Division Failure to pay the fee m ely r ii cc ance with 15A NCAC 2H 4105(b)(4) may cause this
Division to initiate action to revoke th id " 'Pe T it
n
PA I DEFINITIONS
of the individual values divided by the number of
1 Act
See Clean Water Act
2 Arithmetic Mean
The arithmetic mean of any set of values is the summation
individual values
3
4
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
air - conditioner condensate without added
(b) Uncontaminated groundwater, foundation drains,
chemicals, springs, discharges of uncontaminated potable water, waterline and fire hydrant
flushmgs, water from footing drains, flows from riparian habitats and wetlands
(c) Discharges resulting from fire- fighting or tire - fighting training
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 and VI Page 1 of 5

Permit No NCS000549
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 abo\,e ground storage
containers located in close proximity to each other having a total combined storage capacity of greater than
1,320 gallons
7 Clean Water Act
The Federal Water Pollution Control Act, also known e an ater Aet (CWA), as amended, 33
USC 1251, et seq
8 Division or DWQ
The Division of Water Quality, Department of E'E t a atural Resources
9 Director Aff
The Director of the Division ter ZuRty, An-nit issuing authority
10 EMC
The North Carolina Envir ental M na ement Commission
1 l 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
12 Hazardous Substance
Any substance designated under 40 CFR Part 116 pursuant to Section 311 of the Clean Water Act
13 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 infection well, a hazardous waste long -term storage facility or
a surface storage facility
14 Municipal Separate Storm Sewer System
A stormwater collection system within an incorporated area of local self - government such as a city or town
15 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,
Part V I Page 2 of 5 Pages

16
]VA
18
19
20
►21
22
23
Permit No NCS000549
industrial machinery, raw materials, intermediate products, by- products, final products, or waste products
DWQ 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)
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
Permittee
The owner or operator issued a permit pursuant to this individual permit
Point Source Discharge of Stormwater /j
Any discernible, confined and discrete conveyance mcLich , ecif,i� Ily limited to, any pipe, ditch,
channel, tunnel, conduit, well, or discrete fissure from i1 r may be discharged to waters
of the state
Representative Storm Event
A storm event that measures greater than 0 1 1 lies ' f� 1 and that is preceded by at least 72 hours in which no
storm event measuring greater than 0 1 me as ccu d A single storm event may contain up to 10 consecutive
hours of no precipitation For example, f rai ours without producing any collectable discharge, and then
stops, a sample may be collec if a r in odu discharge begins again within the next 10 hours
Representative Outfall Status
When it is established that e dischar e f stormwater runoff from a single outfall is representative of the
discharges at multiple ou a Is, the Q may grant representative outfall status Representative outfall
status allows the permitt o analytical monitoring at a reduced number of outfalis
Rinse Water Discharge
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
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
Section 313 Water Priority Chemical
A chemical or chemical category which
Is listed in 40 CFR 372 65 pursuant to Section 313 of Title I I I of the Superfund Amendments and
Reauthorization Act (SARA) of 1986, also titled the Emergency Planning and Community Right -
to -Know Act of 1986,
Is present at or above threshold levels at a facility subject to SARA Title III, Section 313 reporting
requirements, and
Part VI Page 3 of 5 Pages

24
25
Permit No NCS000549
That meets at least one of the following criteria
(1) Is listed in Appendix D of 40 CFR part 122 on Table It (organic priority pollutants),
Table III (certain metals, cyanides, and phenols), or Table iV (certain toxic pollutants and
hazardous substances),
(2) Is listed as a hazardous substance pursuant to section 31 1(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
Severe Property Damage
Means substantial physical damage to property, damage to the contro acilities which causes them to
become inoperable, or substantial and permanent loss of naturallogices which can reasonably be
expected to occur in the absence of a bypass Severe pr a e does t mean economic loss caused
by delays in production
Significant Materials
Includes, but is not limited to raw materials, futlals s h as solvents, detergents, and plastic
pellets, finished materials such as metallic pro a ials used in food processing or production,
hazardous substances designated under sec ) CERCLA, any chemical the facility is required to
report pursuant to section 313 of Title 11 A hzers, pesticides, and waste products such as ashes,
slag and sludge that have the t►a o stormwater discharges
26 Significant Spills
27
28
29
30
includes, but is not limite '" release bYoil or hazardous substances in excess of reportable quantities
under section 311 of the Q 1 an Wat Act (Ref 40 CFR 110 10 and CFR 117 21) or section 102 of
CERCLA (Ref 40 CFR 02.
Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following rainfall or as a
result of snowmelt
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
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
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
Part VI Page 4 of 5 Pages

31
32
Permit No NCS000549
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
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
Total Maximum Daily Load (TMDL)
A TMDL is a calculation of the maximum amount of a pollutant that a waterbody can receive and still meet
water quality standards, and an allocation of that amount to the pollutant's sources A TMDL is a detailed
water quality assessment that provides the scientific foundation for an implementation plan The
implementation plan outlines the steps necessary to reduce pollutant lads in a certain body of water to
restore and maintain water quality standards in all seasons Th Water Act, Section 303, establishes
the water quality standards and TMDL programs '0 k 19
33 Toxic Pollutant
34
35
36
37
Any pollutant listed as toxic under Section 307(a)(l he ean`�Water Act
Upset
Means an exceptional incident in whichLhl7,e is Lffliatefional and temporary noncompliance with
technology based permit effl t m� tion be of factors beyond the reasonable control of the
permittee An upset does not 1 -lu no o lance to the extent caused by operational error, improperly
designed treatment or control fa ties, a ate treatment or control facilities, lack of preventive
maintenance, or careless or i roper per ion
1T/
Vehicle rehabilitation, mecha—'Fal repairs, painting, fueling, lubrication, vehicle cleaning operations, or
airport deicing operations
Visible Sedimentation
Solid particulate matter, both mineral and organic, that has been or is being transported by water, air,
gravity, or ice fiom its site of origin which can be seen with the unaided eye
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 VI Page 5 of 5 Pages