NC0004308_Permit Issuance_19950109

' State of North Carolina
Department of Environment, !Ntacir
• Health and Natural Resources 4 • •
Division of Environmental Management r
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary E I---' N
A. Preston Howard, Jr., P.E., Director
January 9, 1995
Mr. Henk van der Meyden
Aluminum Company of America
P.O. Box 576
Badin, NC 28009
Subject: Permit Issuance
NPDES Permit#NC0004308
Aluminum Company of America
Stanly County
Dear Mr. van der Meyden:
In accordance with your application for discharge permit received on November 18, 1993,we are
forwarding herewith the subject State-NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the US Environmental Protection Agency dated December 6, 1983m
In response to the draft permit comment letter dated August 25, 1994, the following comrients 0
and/or modifications are offered:
0
General -
• Supplement to Permit Cover Sheet-The wastewater description has been modified. T17
effluent sheet for outfall 014 has been added to cover the discharge of contact cooling war
from the particle caster. Sampling must be performed prior to mixing with any other waste
stream. The wastewater description for outfall 005 now includes brick saw contact cooling
water.
• Supplement to Permit Cover Sheet- The Authorization to Construct language will remain.
The phrase "as necessary" is provided to indicate that treatment may not be required to meet
the permit limits.
• Stormwater Pollution Prevention Plan -The reference to Part II, Section E.8 has been
corrected to Section E.10.
Outfall 002-
• Substituting TSS for settleable solids -This modification has been made to the permit
•Temperature clarification -The receiving water shall not exceed 32°C.
• Phenol monitoring requirement-This requirement has been dropped as requested.
P.O. Box 29535, Raleigh,North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/10%post-consumer paper

f
Permit No. NC0004308
Aluminum Company of America.
January 9, 1995
Page 2 -'
•Toxicity test- The permit,not the fact sheet,is binding. The WET test was changed from
•
chronic to acute since there was no basis for the chronic test IWC(this outfall does not
discharge via the diffuser)and since the discharge flow is variable due to stormwater. Also,
this discharge contains fluoride,aluminum and other metals in addition to sulfates which do
not have limits and thus the toxicity test will cover the complete wastestream. A 90% acute
test is standard for protection of acute effects in situations where there is no defmable IWC.
In this instance the discharge is to a lake so there is no 7Q10 on which to base an IWC,nor is
there a flow limit.
Outfall 004-
•Annual monitoring for TSS,aluminum,total cyanide and fluoride- Annual monitoring only
applies to stormwater based parameters. The fact sheet incorrectly stated that boiler
blowdown was a component of this effluent. Temperature limits are imposed due to the
presence of non-contact cooling water at this outfall.
Outfall 005-
•Discharge of contact cooling water from the particle caster-Outfall 014 now addresses limits
and monitoring requirements for this wastestream as dictated by 40 CFR 421.23(s)and State
regulations. Previously designated stormwater discharge outfall 014 has been changed to
outfall 020.
•Continuous Discharge-Since this is not an episodic discharge,the toxicity test has been _
changed to a quarterly,chronic test at 90% concentration. Special condition"H" addresses
these test requirements.
a
•Basis of TSS requirements-Although the 40 CFR 133 regulations address sews it is Rhe
Division's best professional judgment that the limit of 30 mg/1 is reasonably achiev a fcm
other types of wastewater.
Outfall 011 - cn
•Acute Toxicity Monitoring-The levels of pollutants(CN,Fl,Al,etc.)in the effluent
indicate that there may be instream water quality violations in the absence of adequate mixing
and therefore toxicity testing is required. The episodic test is required due to the episodic
nature of this stormwater bypass.
Outfall 012-
•Basis of Cyanide limit-The limits were derived based on an application of a mixing zone in
which the limit is based on an acute value times dilution. Other mixing zones in the State
which have limits based on dilution provided by a diffuser,have chronic limits. If ALCOA
would like its limit revised,it should be revised such that it is consistent with other permits,
i.e.,based on chronic values. In this case the limit for cyanide would be 5 ug/1 multiplied by
the dilution factor. This would likely require a much more stringent limit.
•Total Cyanide&Dissociation of Complex Cyanides-As stated in Ambient Water Quality
Criteria for Cyanide- 1984(USEPA 1985),until an EPA approved method for free cyanide
becomes available,EPA recommends applying the criteria using the total cyanide method.

•
Permit No. NC0004308
Aluminum Company of America.
January 9, 1.995 .
gage 3
At this time,no EPA approved method for free cyanide exists. Furthermore,the standard
for cyanide set forth in NCAC T15A 02B .0200 is for total cyanide. All NPDES permits in
North Carolina with cyanide limits receive that limit based on total cyanide.
Simple cyanides readily dissociate and hydrolyze to form free cyanide. Cyanide metal
complexes have highly variable stability. The dissociation of these complexes to an
available form is dependent on the metal complex and pH. Due to this variability,the water
quality standard for total cyanide,and the lack of an EPA approved method for free cyanide,
the Division has appropriately applied the total cyanide limit in ALCOA's permit.
•Instream Monitoring-This is required to confirm the dilution provided by the diffuser and
also to provide DEM with sufficient data to review this permit more thoroughly for the basin
plan 4 years from now.
•Settleable Solids Limit-This has been changed to TSS as requested.
Outfall 013 -
•Effluent Mixing-Limits were assigned to protect aquatic life from acute toxicity near the
outfall. Since discharges at acute levels may cause violations of water quality standards in the
absence of adequate mixing,instream monitoring is necessary. Data will be reevaluated,upon
request and submittal, after 12 monitoring events have been completed.
•Cyanide limit-If ALCOA wishes a reevaluation for mixing,chronic limits will be develcjed
based on dilution. For cyanide,the limit will be 5 ug/1 multiplied by the dilution factor. r4
Without a diffuser,the dilution factor will most likely be close to 2:1. a
co
• Settleable Solids Limit-This has been changed to TSS as requested. m
7
•Fluoride limit-The limit was incorrectly listed and has been replaced with monitting qly.
Cr) r-
•
•Instream Monitoring-The area adjacent to this outfall is a designated public swimmin
DEM feels that continued monitoring should be continued to monitor potential water quality
problems and to provide sufficient data to review this permit for the basin plan in 4 years.
Stormwater Monitoring-
•Cut-off Concentrations-Values for metals and toxicants are based on final acute values.
The sporadic nature of rainfall requires that acute effects be considered. Mixing zones are not
appropriate for consideration under these circumstances. Cutoffs for oxygen consuming
parameters parallel levels of secondary treatment for other wastewater. Based on stormwater
data evaluated as a result of the National Urban Runoff Program (NURP),and data collected
during application stages of stormwater program,the majority of data collected from well-
managed sites is well below these concentrations. Stormwater exceeding these levels of
contamination is therefore of significant concern.
Presence of organics in stormwater is indicative of poor site management practices,
particularly given that stormwater runoff is typically turbulent and provides for substantial
opportunity for the organics to volatilize. Freshwater criteria maximums were used as
guidance in evaluating these parameters.

Permit No. NC0004308
Aluminum Company of America.
January 9, 1995 4
Page 4
•Total Suspended Solids inappropriate for 018 and 019-These monitoring requirements are
not included to provide stormwater data from the landfill areas exclusively. The intent is to
obtain information on the stormwater characteristics from all sources at these outfalls. If the
monitoring results are below the cut-off concentration then monitoring can be discontinued
except for the last year of the permit term.
•Aluminum monitoring requirement should be dropped- Since this facility manufactures
aluminum,the potential to contribute significantly to storm water runoff exists. Therefore,it is
reasonable to require monitoring at the stormwater outfalls. If desired,ALCOA can collect
samples from non-manufacturing areas and analyze for aluminum and compare the results to
manufacturing area runoff. Any difference between the two results would be the contribution
made by manufacturing operations. If this option is pursued,DEM must approve selection of
the"non-manufacturing outfall" beforehand.
•Total Cyanide vs.Free Cyanide-This cannot be done for the reasons cited in the response
for outfall 012.
•Footnote 1, Discontinuation of Monitoring-This has been rewritten. If monitoring data are
below the cut-off concentration,then monitoring for that parameter can be discontinued except
for the last year of the permit term.
•Visual Monitoring guidance-A form is attached that provides some guidance in visually
. . evaluating the discharge. Visual monitoring is used in determining the effectiveness of the
Stormwater Pollution Prevention Plan and in identifying possible areas of concern..__
Section B: Schedule of Compliance-The required submittal date has been extended to 24 mons
as requested. c._
Part III Other Requirements- - r
•The referenced conditions(sections "A" and"D")were included in the draft permit*+ gi mistake. They do not apply to this facility and have been removed from the final perrVit. -
• Basis for Chronic Toxicity Test Concentration-The value of 16% at outfall 012 is baseckn
the expected dilution provided by the diffuser.
•Basis for Acute Toxicity Limit Test Concentration -There was no basis for the existing test
concentration of 16% since these outfalls(002 and 013) do not discharge via a diffuser. A
90% acute test is standard for protection of acute effects where there is no easily definable
instream waste concentration,such as these discharges to the lake.
• Acute Toxicity (Episodic)Test-The episodic test at outfall 005 has been replaced with a
chronic test appropriate for continuous discharges. For outfall 011,DEM policy is to specify
an episodic test for discharges primarily comprised of stormwater.
If any parts,measurement frequencies or sampling requirements contained in this permit are
unacceptable to you,you have the right to an adjudicative hearing upon written request within thirty
(30)days following receipt of this letter. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings,Post Office Drawer 27447,Raleigh,North Carolina 27611-7447. Unless
such demand is made,this decision shall be final and binding.

, Permit No. NC0004308
Aluminum Company of America.
• January 9, 1995
Page 5
Please take notice this permit is not transferable. Part II,E.4. addresses the requirements to be
followed in case of change in ownership or control of this discharge.
This permit does not affect the legal requirements to obtain other permits which may be required by
the Division of Environmental Management or permits required by the Division of Land Resources,
Coastal Area Management Act or any other Federal or Local governmental permit that may be
required.
If you have any questions concerning this permit,please contact Mr.Greg Nisch at telephone
number 919/733-5083.
Sincerely,
•
biteei,e.e.....
(mom
. Preston Howard, Jr., P.E.
IA
cc: Mr. Jim Patrick, EPA
Mooresville Regional Office
Compliance
Central Files z
NPDES Files -- - - - -- _. --- -. --
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STORMWATER DISCHARGE OUTFALL (SDO)
VISUAL MONITORING REPORT
Certificate of Coverage No. NCG
Facility Name:
County: Phone No:( )
Inspector:
Date of Inspection:
By this signature,I certify that this report is accurate and complete to the best of my
knowledge:
(Signature of permittee or designee)
1 . Outfall Description 32rri
v
Outfall No. Structure (pipe, ditch,etc.):
Receiving Stream:
Describe the industrial activities that occur within the outfall drainage area: V3 f
m
2 . Color
Describe the color of the discharge using basic colors (red,brown, blue, etc.) and tint
(light, medium, dark) as descriptors:
3 . Odor
Describe any distinct odors that the discharge may have (i.e. smells strongly of oil, weak
chlorine odor, etc.):
Page 1 of 2 8/1/94

Permit No. NC0004308
• STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH,AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission,and the Federal Water Pollution Control Act,as amended,
Aluminum Company of America
is hereby authorized to discharge wastewater from a facility located at
the intersection of NC Highway 740&NCSR 1719
in Badin
Stanly County
to receiving waters designated as Little Mountain Creek&Yadkin River(Badin Lake)in the a -
Yadkin-Pee Dee River Basin
C3
in accordance with effluent limitations,monitoring requirements,and other conditions set forth irk w
Parts I, II,and III hereof. = n
This permit shall become effective February 1, 1995 to
� r
This permit and the authorization to discharge shall expire at midnight on August 31, 1999r�,
Signed this day January 9, 1995
A. Preston Howard, Jr., P.E., Director
Division of Environmental Management
By Authority of the Environmental Management Commission

•
Permit No. NC0004308
. • 4 •
SUPPLEMENT TO PERMIT COVER SHEET
Aluminmum Company of America
is hereby authorized to:
1. Continue to operate a pH neutralization facility and discharge non-contact cooling water,
boiler blowdown, steamline condensate and stormwater from Outfall 002; continue to
discharge non-contact cooling water and stormwatet from Outfall 004;continue to operate a
rope oil skimmer and discharge stormwater,brick saw cooling water,compressor condensate
and non-contact cooling water from Outfall 005;continue to discharge non-contact cooling
water, groundwater,condensate and stormwater from outfall 012 (and stormwater from
Outfall 011 during storm events causing a bypass of the diffuser),continue to discharge
particle caster contact cooling water from Outfall 014;and stormwater from outfalls 015,016,
017,018,019 and 020 located at Aluminum Company of America,intersection of NC
Highway 740&NCSR 1719,Badin,in Stanly County(See Part III of this Permit),and
2. Discharge from said locations specified on the attached maps into an unnamed tributary to
Little Mountain Creek(outfalls 004,005,014,016,017 and 018),and into the Yadkin River
(outfalls 002,011,012,015,019 and 020)which are classified Class "C" waters and Class
"WS-IV &B CA" waters,respectively,in the Yadkin-Pee Dee River Basin.
3. After receiving an Authorization to Construct from the Division of Environmental
Management,construct treatment facilities as necessary to meet the limits of this permit. pr-
wastewater/stormwater outfall at 013,and �r
4. Discharge said wastewater/stormwater at the location specified on the attached m int e
Yadkin River which is classified Class "WS-IV &B CA" waters in the Yadkin-Pee ver
Basin. `, �'
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All discharges shall be in accordance with the attached schedules as follows:
c
Part I: Monitoring, Controls and Limitations for Permitted Discharges
Part II: Standard Conditions for NPDES Permits
Part III: Special Conditions
Part IV: Administering and Compliance Monitoring Fee Requirements
Any other point source discharge to surface waters of the state is prohibited unless covered by another
permit,authorization or approval.
This permit does not relieve the permittee from responsibility for compliance with any other applicable
federal, state,or local law,rule, standard, ordinance, order,judgement, or decree. �

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Permit No. NC0004308
4
PART I
MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
SECTION A: FINAL LIMITATIONS AND CONTROLS FOR STORMWATER DISCHARGES
During the period beginning on the effective date of the permit and lasting until expiration,the
Perrnittee is authorized to discharge wastewater and stormwater associated with industrial activity.
Such discharges shall be controlled,limited and monitored as specified below.
1. 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 II,Standard
Conditions, Section E.10. of this permit. The Plan shall include,at a minimum,the following
items:
a. Site Plan. The site plan shall provide a description of the physical facility and the potential
pollutant sources which may be expected to contribute to contamination of stormwater
discharges. The site plan shall contain the following:
(1) A general location map (USGS quadrangle map or appropriately drafted equivaleri
map),showing the facility's location in relation to transportation routes and surface
waters, the name of the receiving water(s)to which the stormwater outfall(0. m
discharges,or if the discharge is to a municipal separate storm sewer systedE the<
name of the municipality and the ultimate receiving waters;and accurate latitude
and longitude of the point(s)of discharge.
'.a a
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(2) A narrative description of storage practices,loading and unloading activities'
outdoor process areas,dust or particulate generating or control processes,and w
waste disposal practices.
(3) A site map drawn to scale with the distance legend indicating location of industrial
activities (including storage of materials,disposal areas,process areas and loading
and unloading areas),drainage structures,drainage areas for each outfall and
activities occurring in the drainage area,building locations and impervious surfaces,
and the percentage of each drainage area that is impervious. For each outfall,a
narrative description of the potential pollutants which could be expected to be
present in the stormwater discharge.
(4) A list of significant spills or leaks of pollutants that have occurred at the facility
during the 3 previous years and any corrective actions taken to mitigate spill
impacts.
(5) 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 II,Standard Conditions, Section
B.11.

• Permit No. NC0004308
• b, Storniwater 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:
(1) A study addressing the technical and economic feasibility of changing the methods
of operations and/or storage practices to eliminate or reduce exposure of materials
and processes to stormwater. Wherever practicable the permittee shall cover all
storage areas, material handling operations,manufacturing or fueling operations to
prevent materials exposure to stormwater. In areas where elimination of exposure
is not practicable,the stormwater management plan shall document the feasibility of
diverting the stormwater runoff away from areas of potential contamination.
(2) A schedule to provide secondary containment for bulk storage of liquid materials,
storage of Section 313 of Title III of the Superfund Amendments and
Reauthorization Act(SARA)water priority chemicals,or storage of hazardous
materials to prevent leaks and spills from contaminating stormwater runoff. If the
secondary containment devices are connected directly to stormwater conveyance
systems,the connection shall be controlled by manually activated valves or other
similar devices [which shall be secured with a locking mechanism] and any
stormwater that accumulates in the containment area shall be at a minimum visually
observed for color,foam,and visible sheens, prior to release of the accumulated
stormwater. Accumulated stormwater shall be released if found to be
uncontaminated. Records documenting the individual making the observation,the
description of the accumulated stormwater and the date and time of the release shall -
be kept fora period of five years.
(3) A narrative description shall be provided of Best Management Practices(BMPs)to 8
be considered such as,but not limited to, oil and grease separation,debris control,m
vegetative filter strips,infiltration and stormwater detention or retention,when
necessary. The need for structural BMPs shall be based on the assessment of- •m
potential of sources to contribute significant quantities of pollutants to stormvter
discharges and data collected through monitoring of stormwater discharges,
(4) Inspection schedules of stormwater conveyances and controls and measures to be
rth
taken to limit or prevent erosion associated with the stormwater systems.
c. Spill Prevention and Response Plan. The Spill Prevention and Response Plan shall
incorporate a risk assessment of potential pollutant sources based on a materials inventory
of the facility. Facility personnel (or team)responsible for implementing the plan shall be
identified in the plan. A responsible person shall be on-site at all times during facility
operations that have the potential to contaminate stormwater runoff through spills or
exposure of materials associated with the facility operations.
d. Preventative Maintenance and Good Housekeeping Program. A preventative maintenance
program shall be developed. The program shall document schedules of inspections and
maintenance activities of stormwater control systems,plant equipment and systems.
Inspection of material handling areas and regular cleaning schedules of these areas shall be
incorporated into the program.
e. Employee Training. Training schedules shall be developed and training provided at a
minimum on an annual basis on proper spill response and cleanup procedures and
preventative maintenance activities for all personnel involved in any of the facility's

Permit No. NC0004308 ,
operations that have the potential to contaminate stormwater runoff. Facility personnel (or4
team)responsible for implementing the training shall be identified in the Plan.
f. 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(s)assignments provided.
g. Plan Ammendment. 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. The Stormwater Pollution
Prevention Plan shall be reviewed and updated on an annual basis.
The Director may notify the permittee when the Plan does not meet one or more of the
minimum requirements of the permit. Within 30 days of such notice,the permittee shall
submit a time schedule to the Director for modifying the Plan to meet minimum
requirements. The permittee shall provide certification in writing(in accordance with Part
II, Standard Conditions, Section B, 11)to the Director that the changes have been made.
h. Facility Inspections. Inspections of the facility and all stormwater systems shall occur at a
minimum on a semiannual schedule,once in the fall (September-November)and once
during the spring(April-June). The inspection and any subsequent maintenance activities
performed shall be documented,recording date and time of inspection,individual(s)
making the inspection and a narrative description of the facility's stormwater control
systems,plant equipment and systems. Records of these inspections shall be incorporated
into the Stormwater Pollution Prevention Plan. A
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Visual monitoring as required in I.A.2.A.(7).b. shall be performed in addition to facty <
inspections. — m
Implementation. Implementation of the plan shall include documentation of all monn}}tk�rin&
measurements,inspections and maintenance activities and training provided to empMees,
including the log of the sampling data and of activities taken to implement BMPs associa
with the industrial activities,including vehicle maintenance activities. Such documentatio
shall be kept on-site for a period of five years and made available to the Director or his
authorized representative immediately upon request.
2. Minimum Monitoring and Reporting Requirements
Minimum monitoring and reporting requirements are as follows unless otherwise approved in
writing by the Director of the Division of Environmental Management. (See effluent sheets that
follow).

A. (1). EFFLUENT LIMITATIONS AND MONTTORING REQUIREMENTS FINAL Permit No. NC0004308
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 002 (Non-contact cooling water, steamline condensate, boiler blowdown and stormwater). Such discharges shall be limited
and monitored by the permittee as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements •
Lbs/day Units (Specify) Measurement Sample •Sample
Mon. Avg.Daily Max. Mon. Avg. Daily Max. Frequency Type Location
Flow Weekly Instantaneous E
Total Suspended Solids 30.0 mg/I 60.0 mg/I 2/month Grab E
Sulfates 250.0 mg/I 2/month Composite E
Turbidity • • • ' 2/month Grab EMD
Temperature °C ' ' • • • ' Weekly Grab E$14
Fluoride Monthly Composite E
Acute Toxicity'. Quarterly Composite E
* Sample locations: E-Effluent,D-Downstream within 50 feet df outfall.
**The discharge shall not cause the turbidity of the receiving waters to exceed 25 NTU. If the turbidity exceeds these levels due to natural
background conditions,the discharge level cannot cause any increase in the turbidity in the receiving waters.
***The discharge shall not cause the temperature of the receiving water to exceed 2.8°C above background and in no case exceed 32°C.
**** Acute Toxicity(Fathead Minnow)24 hr P/F @ 90%;March,June,September and December, See part III,Condition F.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be conducted 2/month at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
56 L I Kvr
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A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0004308
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from •
outfall(s) serial number 004 (Non-contact cooling water and stormwater). Such discharges shall be limited and monitored by the permittee as
specified below:
Effluent Characteristics piecharae Limitations Monitofina Requirements
bs da Units (Specify) Measurement Sample 'Sample
Mon. Avg.Daily Max. Mon. Avg. Daily Max, FrequencyType Location
Flow Weekly Instantaneous E
Temperature °C ' ' ' ' Weekly Grab E,U,D'
Total Residual Chlorine( Weekly Grab E
Total Suspended Solids Annual Grab E
Aluminum Annual Grab E
Total Cyanide Annual Grab E
Fluoride Annual Grab E
* Sample locations: E-Effluent,U- Upstream,D-Downstream!
THERE SHALL BE NO CHROMIUM,ZINC OR COPPER ADDED TO THE COOLING WATER EXCEPT AS PRE-APPROVED
ADDITIVES TO BIOCIDAL COMPOUNDS.
1 Monitoring requirements only apply if chlorine is added to the cooling water.
**The discharge shall not cause the temperature of the receiving water to exceed 2.8°C above background and in no case exceed 32°C.
The permittee shall obtain authorization from the Division of Environmental Management prior to utilizing any biocide in the cooling water
(See Part III,Condition I.)
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be conducted monthly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
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•
A. (3). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0004308
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from - -
outfall(s) serial number 005 (Non-contact cooling water, brick saw cooling water, compressor condensate and stormwater). Such discharges shall be
limited and monitored by the permittee as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Lbs/day Units (Specify) Measurement Sample •Samplb
Mon. Avg.Daily Max, Mon. Avg. Daily Max. FrequencyType Location
Flow Weekly Instantaneous E
Oil and Grease 30.0 mg/I 60.0 mg/I 2/month Grab E
•
Total Suspended Solids 30.0 mg/I 60.0 mg/I 2/month Grab E
Turbidity 50 NTU 2/month Grab E
Chronic Toxicity** Quarterly Grab E
* Sample locations:E-Effluent.
** Chronic Toxicity P/F @ 90% (Ceriodaphnia);March,June,September and December; See Part III,Condition H.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be conducted 2/month at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
•
•
S6 L i unr.
63114 1VU.LN33 A8 0038.

A. (4). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0004308
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from '
outfall(s)serial number 011*** (Stormwater). Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics Discharae Limitations IUonitorina Requirements
Lbs/day Units (Specify) Measurement Sample 'Sample
Mon. Ava.Daily Max. Mon. Avg. Daily Max. Frequency Tyos Location
Flow Episodic Continuous E
Fluoride Episodic Grab E
Total Cyanide Episodic Grab E
Oil and Grease Episodic Grab E
Total Suspended Solids Episodic Grab E
Acute Toxicity" * * Grab E
* Sample locations: E-Effluent.
** Acute Toxicity Monitoring (Episodic); First five discrete discharge events; See Part 111,Condition G.
CCC During storm events causing a bypass of the diffuser. I
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be conducted at the effluent by grab sample on
an episodic basis.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
1
•
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•
A. (5). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0004308 _
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to dischargewfrom `
outfall(s)serial number 012 (Non-contact cooling water, groundwater, condensate and stormwater). Such discharges shall be limited and monitored
by the permittee as specified below:
Effluent Characteristics pischarge Limitations Monitoring Aeauirements
Lbs/day Units (Specify) Measurement Sample 'Sample
Mon. Avg.Daily Max. Mon. Avg. Daily Max. Frequency Tvoe Location
Flow Weekly Instantaneous E
Total Cyanide 434.0 ug/I 2/month Grab E,U,Ii
Oil and Grease 30.0 mg/I 60.0 mg/I 2/month Grab E
Total Suspended Solids 30.0 mg/I 60.0 mg/I 2/month Grab E
Aluminum Monthly Grab E,U,D
Fluoride Monthly Grab E,U,D
Turbidity Monthly Grab E
Chronic Toxicity• Quarterly Grab E
* Sample locations: E-Effluent;U,D-The 3 sites indicated on the attached map. Instream samples shall be grab samples.
** Chronic Toxicity P/F @ 16% (Ceriodaphnia);March,June,September and December; See part III,Condition E.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be conducted 2/month at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts. •
S6 LI NW
83113 1V W30 A8 03311

A. (6). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0004308
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 013 (Spring water, groundwater and stormwater). Such discharges shall be limited and monitored by the permittee as
specified below:
Effluent Characteristics Discharae Limitations Monitorina Requirements
1.2sItey Units (Specify) Measurement Sample •Sample
Mon. Avg.Daily Max. Mon. Ava. Daily Max. frequencyType Location
Flow Weekly Instantaneous E
Total Cyanide 22.0 ug/I 2/month Grab
Total Suspended Solids 30.0 mg/I 60.0 mg/I 2/month Grab E
Fluoride Monthly Composite E,U,D
Turbidity • • • • 2/Month Grab E,U,D
Aluminum Monthly Composite E,U,D
Acute Toxicity••• Quarterly Composite E
* Sample locations:E- Effluent;U,D-Badin Lake at the 3 sites indicated on the attached map. Instream samples shall be grab samples.
** The discharge shall not cause the turbidity of the receiving waters to exceed 25 NIU. If the turbidity exceeds these levels due to natural
background conditions,the discharge level cannot cause any increase in the turbidity in the receiving waters.
*** Acute Toxicity, 24 hr P/F @ 90% ; March,June, September and December; See part III,Condition F.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be conducted 2/month at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
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A. (7). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0004308
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from •
outfall(s)serial number 014(Particle Caster Contact Cooling Water). Such discharges shall be limited and monitored by the permittee as specified
below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Lbs/day Units (Specify) Measurement Sample •Sample
Mon. Avg.Daily Max. Mon. Avg. Daily Max, Frequency Type Location
Flow Weekly Instantaneous E
Benzo(a)pyrene • ' Monthly Grab E •
Antimony ' • • • Monthly Grab E
Nickel • • • • Monthly Grab E
Aluminum • • • • Monthly Grab E
Fluoride • • • • Monthly Grab
* Sample locations: E-Effluent. Samples shall be taken prior to mixing with any other waste streams.
** No detectable amount.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be conducted monthly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
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A. (8). STORMWATER MONITORING REQUIREMENTS Permit No. NC0004308' .
a) Analytical Monitoring- s
During the period beginning on the effective date of the permit and lasting until expiration,the Permittee is authorized to discharge from outfall(s)
serial numbers 015, 016, 017, 018, 019 and 020 (Stormwater). Such discharges shall be limited and monitored by the permittee as specified
below: .
Monitoring Requirements
Stormwater Discharge Units Cut-off Measurement Sample Sample .
Characteristics Concentration) Freauency2 Tvoe Locations
Total Flow4 MG Annual SDO
Total Rainfall4 inches Annual
Event Duration4 minutes Annual
Total Suspended Solids mg/I 100.0 Annual Grab SDO
COD mg/I 120.0 Annual Grab SOO
Aluminum mg/I • Annual Grab SOO
Total Cyanide mg/I 0.022 Annual Grab SDO
Fluoride mg/I 1.8 Annual Grab SDO
1 For each parameter, the arithmetic mean of all analytical sampling results collected during the term of the permit shall be calculated for
each individual outfall and compared to the cut-off concentrations listed. If the arithmetic mean is below the specified cut-off concentration
condition for a given parameter, then the facility is not required to continue annual analytical monitoring for that parameter at that outfall
during the term of the permit unless a significant change in facility operations or configuration occurs. If a sampling concentration results
in discontinued analytical monitoring at an individual discharge outfall, the permittee is required to maintain facility operations that ensure
the continuation of stormwater runoff quality.
The permittee must perform analytical sampling during the first and last year of the permit term regardless of cut-off concentration
conditions. Analytical results from sampling during the final year of the permit term must be submitted with the permit renewal application.
2 Measurement Frequency: Once per year with samples taken during the sampling window of April through November. The facility must
perform analytical sampling during the first and last year of the permit term regardless of cut-off concentration conditions.
3 Sample locations: SDO - Samples to be taken at each stormwater discharge outfall (SDO) unless representative outfall status is granted. If a
facility has multiple discharge locations with substantially Stntjc��rmwater discharges that are required to be sampled, the permittee may
petition the Director for representative outfall status. If it is e§§�t ed that the stormwater discharges are substantially identical and the
permittee is granted representative outfall status, the lingg requirements may be performed at a reduced number of outfalls.
�ULNa3 A8 cum
* If the monitoring results are below cut-off concentrations for all other parameters, then monitoring for Aluminum will be suspended also.

4 For each sampled representative storm event the total precipitation, storm duration, and total flow must be monitored. Total flow shall be
either; (a) measured continuously, (b) calculated based on the amount of area draining to the outfall, the amount of built-upon (impervious)
area, and the total amount of rainfall, or (c) estimated by the measurement of flow at 20 minute intervals during the rainfall event.
For purposes of the stormwater sampling required In this permit, all samples shall be collected from a discharge resulting from a
representative storm event (See Part III, Special Conditions, Section J). Failure to monitor storm events in accordance with the specified
frequency shall constitute a violation of this permit.
•
b)Visual Monitoring-
Visual monitoring requires a qualitative visual inspection of each stormwater outfall, regardless of representative outfall status, for the
purpose of evaluating the effectiveness of the Stormwater Pollution Prevention Plan (SPPP) and assessing new sources of stormwater
pollution. All visual monitoring shall be documented and records maintained with the SPPP. No analytical tests are required. Visual
monitoring of storrnwater outfalls does not need to be performed during a representative storm event, but must be performed at all discharge
outfall locations. Documentation of the initial visual monitoring event, only, shall be submitted along with the required analytical
monitoring data.
Stormwater Discharge Monitoring Monitoring
Characteristics Frequencyl Tyoe2 Location3
Color Semi-Annual Visual SCO
Odor Semi-Annual Olfactory SDO
Clarity Semi-Annual Visual SDO
Floating Solids Semi-Annual Visual SDO
Suspended Solids Semi-Annual Visual SDO •
Foam Semi-Annual Visual SDO
Oil Sheen Semi-Annual Visual SDO
Other obvious indicators Semi-Annual Visual SCO
of stormwater pollution
1 Frequency: The first visual monitoring event during the term of the permit must be performed during the initial analytical monitoring
event. All subsequent visual monitoring will be performed twice per year, once in the spring and once in the fall.
2 Monitoring Type: Visual monitoring requires a qualitativ isual observation of each stormwater outfall. No analytical testing or
sampling is required. S� LI Nor
3 Monitoring Location: Stormwater Discharge OuffaIREMCIYULN30 A9 a33S.

Permit No. NC0004308
• • PARTI
• SECTION B: SCHEDULE OF COMPLIANCE
1. The permittee shall comply with Final Limitations and Controls specified for stormwater
discharges in accordance with the following schedule:
The Stormwater Pollution Prevention Plan shall be developed and implemented within 24
months of the effective date of this permit and updated thereafter on an annual basis.
Secondary containment, as specified in Part I, Section A, 1. b. 2. of this permit,shall be
accomplished within 24 months of the effective date of this permit
2. The permittee shall comply with Final Effluent Limitations by the effective date of the
permit unless specified below.
3. Permittee shall at all times provide the operation and maintenance necessary to operate the
existing facilities at optimum efficiency.
A
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• Part III Permit No. NC0004308
• a CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT(QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure- Revised *September 1989)or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 16% (defined as treatment two in the North Carolina procedure document).
The permit holder shall perform quarterly monitoring using this procedure to establish compliance
with the permit condition. The first test will be performed after thirty days from the effective date
of this permit during the months of March,June, September and December. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1)for the month in which it was performed,using the parameter
code TGP3B. Additionally, DEM Form AT-1 (original)is to be sent to the following address:
Attention:
Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607 -
-- Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total resical
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed8or
disinfection of the waste stream. 7
Should any single quarterly monitoring indicate a failure'to meet specified limits, thetr�non y
monitoring will begin immediately until such time that a single test is passed. Upon passing, s
monthly test requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Car a
Division of Environmental Management indicate potential impacts to the receiving stream, is
permit may be re-opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate retesting(within 30 days of initial monitoring event). Failure to submit
suitable test results will constitute noncompliance with monitoring requirements.
F. ACUTE TOXICITY PASS/FAIL PERMIT LIMIT(QRTRLY)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the
North Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration." The monitoring shall be performed as a Fathead
Minnow (Pimephales promelas) 24 hour static test, using effluent collected as a 24 hour
composite. The effluent concentration at which there may be at no time significant acute mortality
is 90% (defined as treatment two in the North Carolina procedure document). Effluent samples for
self-monitoring purposes must be obtained during representative effluent discharge below all waste
treatment. The first test will be performed after thirty days from the effective date of this permit
during the months of March,June,September and December.

• All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1)for the month in which it was performed,using the parameter
code TGE6C. Additionally,DEM Form AT-2 (original)is to be sent to the following address:
Attention:
Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the months specified above.
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Environmental Management indicate potential impacts to the receiving stream,
this permit may be re-opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate retesting(within 30 days of initial monitoring event). Failure to submit
suitable test results will constitute noncompliance with monitoring requirements.
171
G. ACUTE TOXICITY MONITORING(EPISODIC) a
ta
The permittee shall conduct FIVE acute toxicity tests using protocols defined as definitive i
E.P.A. Document 600/4-85/013 entitled "The Acute Toxicity of Effluents to Freshwa1r
Marine Organisms." The monitoring shall be performed as a Fathead Minnow (Pinhal
promelas) 24 hour static test, using effluent collected as a single grab sample. Effluent samples
for self-monitoring purposes must be obtained below all waste treatment. Sampling a
subsequent testing will occur during the first five discrete discharge events after the effective datE
of this permit. After monitoring of the first five toxicity tests, the permittee will conduct one test
annually, with the annual period beginning in January of the next calendar year. The annual test
requirement must be performed and reported by June 30. If no discharge occurs by June 30,
notification will be made to the Division by this date. Toxicity testing will be performed on the
next discharge event for the annual test requirement.
The parameter code for this test is TAE6C. All toxicity testing results required as part of this
permit condition will be entered on the Effluent Discharge Form (MR-1)for the month in which it
was performed,using the appropriate parameter code. Additionally, DEM Form AT-1 (original)is
to be sent to the following address:
Attention:
Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.

•
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Diyision of Environmental Management indicate potential impacts to the receiving stream,
&s permit may be re-opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls,shall constitute an invalid test.
Failure to submit suitable test results will constitute noncompliance with monitoring requirements.
H. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT(QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure-Revised*September 1989)or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 90% (defined as treatment two in the North Carolina procedure document).
The permit holder shall perform quarterly monitoring using this procedure to establish compliance
with the permit condition. The first test will be performed after thirty days from the effective date
of this permit during the months of March,June, September and December. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1)for the month in which it was performed,using the parameter .
code TGP3B. Additionally,DEM Form AT-1 (original)is to be sent to the following address:
Attention:
•
Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Environmental Management indicate potential impacts to the receiving stream, this
permit may be re-opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate retesting(within 30 days of initial monitoring event). Failure to submit
suitable test results will constitute noncompliance with monitoring requirements.
I. Biocide Condition
The permittee shall not use any biocides except those approved in conjunction with the permit
application. The permittee shall notify the Director in writing not later than ninety (90) days prior
to instituting use of any additional biocide used in cooling systems which may be toxic to aquatic

life other than those previously reported to the Division of Environmental Management. Such •
notification shall include completion of Biocide Worksheet Form 101 and a map locating the
discharge point and receiving stream. it •

. Part III Permit No. NC0004308
J. Stormwater Definitions
1. Best Management Practices (BMPs)
Schedules of activities,prohibitions of practices, maintenance procedures, and
other management practices to prevent or reduce the pollution of waters of the
United States. BMPs also include treatment requirements,operation procedures,
and practices to control plant site runoff,spillage or leaks,sludge or waste
disposal,or drainage from raw material storage.
2. Bulk Storage of Liquid Products
Liquid raw materials,manufactured products,waste materials or by-products with
a single above ground storage container having a capacity of greater than 660
gallons or with multiple above ground storage containers having a total storage
capacity of greater than 1,320 gallons.
3. Coal Pile Runoff
The rainfall runoff from or through any coal storage pile.
4. 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.
5. Point Source Discharge
Any discernible,confined and discrete conveyance, including but specifically not
limited to, any pipe, ditch,channel,tunnel, conduit,well, discrete fissure,
container,rolling stock,or concentrated animal feeding operation from which
pollutants are or may be discharged to waters of the state.
6. Representative Storm Event
A storm event that is preceded by at least 72 hours in which no storm event
measuring greater than 0.1 inches has occurred.
7. Runoff Coefficient
The fraction of total rainfall that is not infiltrated into or otherwise retained by the
soil,concrete, asphalt or other surface upon which it falls that will appear at the
conveyance as runoff.
8. 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.

Part III Permit No. NC0004308 •
9. Section 313 Water Priority Chemical
A chemical or chemical category which:
a. Is listed in 40 CFR 372.65 pursuant to Section 313 of Title III of the
' Superfund Amendments and Reauthorization Act(SARA)of 1986, also
titled the Emergency Planning and Community Right-to-Know Act of
1986;
b. Is present at or above threshold levels at a facility subject to SARA title
III, Section 313 reporting requirements;and
c. That meet at least one of the following criteria:
(1) Is listed in appendix D of 40 CFR part 122 on either Table II
(organic priority pollutants),Table III(certain metals,cyanides,
and phenols) or Table IV(certain toxic pollutants and hazardous
substances);
(2) Is listed as a hazardous substance pursuant to section 311(b)(2)(A)
of the CWA at 40 CFR 116.4; or
(3) Is a pollutant for which EPA has published acute or chronic water
quality criteria.
10. 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.
11. Significant Spills
Includes, but is not limited to: releases of oil or hazardous substances in excess of
reportable quantities under section 311 of the Clean Water Act(Ref: 40 CFR
110.10 and CFR 117.21) or section 102 of CERCLA (Ref: 40 CFR 302.4).
12.5tormwater Runoff
The flow of water which results from precipitation and which occurs immediately
following rainfall or as a result of snowmelt.
13. 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. The term does not include discharges
from facilities or activities excluded from the NPDES program.

Part III Permit No.NC0004308
The following categories of facilities are considered to be engaging in "industrial
activity":
a. Facilities subject to stormwater effluent limitations guidelines,new source
performance standards, or toxic pollutant effluent standards under 40 CFR
Subchapter N Parts 400-471 (except facilities which are exempted under
(k)of this definition);
b. Facilities classified as Standard Industrial Classifications 24(except
2434), 26(except 265 and 267),28,29,30, 311,32,33, 3441,373;
c. Facilities classified as Standard Industrial Classifications 10 through 14
(mineral industry) including active or inactive mining operations(except
for areas of coal mining operations meeting the definition of a reclamation
area under 40 CFR 434.11(1)) and oil and gas exploration,production,
processing, or treatment operations,or transmission facilities that
discharge stormwater contaminated by contact with or that has come in
contact with, any overburden,raw material,intermediate products,
finished products, byproducts or waste products located on the site of such
operations; inactive mining operations are mining sites that are not being
actively mined,but which have an identifiable owner/operator,
d. Hazardous waste treatment, storage, or disposal facilities,including those
that are operating under interim status or a permit under Subtitle C of
RCRA;
e. Landfills,land application sites, and open dumps that receive or have
received any industrial wastes (waste that is received from any of the
facilities described under this definition) including those that are subject to
regulation under Subtitle D of RCRA;
f. Facilities involved in the recycling of materials, including metal
scrapyards,battery reclaimers, salvage yards and automobile junkyards,
including but limited to those classified as Standard Industrial
Classification 5015 and 5093;
g. Steam electric power generating facilities,including coal handling sites;
h. Transportation facilities classified as Standard Industrial Classifications
40,41,42,44, and 45 which have vehicle maintenance shops, equipment
cleaning operations,or airport deicing operations. Only those portions of
the facility that are either involved in vehicle maintenance (including
vehicle rehabilitation, mechanical repairs, painting,fueling and
lubrication),equipment cleaning operations, airport deicing operations,or
which are otherwise identified under(a)-(g) or(i)-(k) of this definition are
associated with industrial activity;
i. Treatment works treating domestic sewage or any other sewage sludge or
wastewater treatment device or system, used in the storage treatment,
recycling,and reclamation of municipal or domestic sewage,including
lands dedicated to the disposal of sewage sludge that are located within the
confines of the facility,with a design flow of 1.0 mgd or more,or required
to have an approved pretreatment program under 40 CFR part 403. Not
included are farm lands,domestic gardens or lands used for sludge

Part III Permit No. NC0004308 •
management where sludge is beneficially reused and which are not
physically located in the confines of the facility,or areas that are in
compliance with section 405 of the CWA;
j. Construction activity including clearing, grading and excavation activities
except: operations that result in the disturbance of less that five acres of
total land area which are not part of a larger common plan of development
or sale;
k. Facilities under Standard Industrial Classifications 20,21,22,23,2434,
25,265,267,27,283,285,30, 31 (except 311), 323, 34 (except 3441),35,
36,37 (except 373), 38, 39,4221-25,(and which are not otherwise
included within(a)-(j)of this definition).
For the categories of industries identified in (a)through(j) of this definition the
term includes,but is not limited to,stormwater discharges from industrial plant
yards; immediate access roads and rail lines used or traveled by carriers of raw
materials,manufactured products,waste material, or by-products used or created
by the facility; material handling sites;refuse sites; sites used for the application
or disposal of process wastewaters; sites used for the,storage and maintenance of
material handling equipment;sites used for residual treatment, storage,or
disposal;shipping and receiving areas; manufacturing buildings; storage areas
(including tank farms) for raw materials, and intermediate and finished products;
and areas where industrial activity has taken place in the past and significant
materials remain and are exposed to stormwater. For the categories of industries
identified in (k), the term includes only stormwater discharges from all areas
listed in the previous sentence (except access roads)where material handling
equipment or activities,raw material,intermediate products, final products,waste
material,by-products, or industrial machinery are exposed to stormwater.
Material handling activities include the: storage,loading and unloading,
transportation, or conveyance of any raw material,intermediate product,finished
product,by-product or waste product. The term excludes areas located on plant
lands separated from the plant's industrial activities,such as office buildings and
accompanying parking lots as long as the drainage from the excluded areas is not
mixed with stormwater drained from the above described areas.
Industrial facilities (including industrial facilities that are Federally or municipally
owned or operated that meet the description of the facilities listed in (a)-(k))
include those facilities designated under 40 CFR 122.26(a)(1)(v).
14. Ten Year Design Storm
The precipitation event of a duration which will produce the maximum peak rate
of runoff for the watershed of interest resulting from a rainfall event of an
intensity expected to be equaled or exceeded,on the average, once in ten years.
15. Total Flow
The flow corresponding to the time period over which the sample collection
occurs. The total flow calculated based on the size of the area draining to the
outfall, the amount of the built-upon (impervious) surfaces within the drainage
area,and the total amount of rainfall occurring during the sampling period.

• Part DT Permit No. NC0004308
16. Vehicle Maintenance Activity
• Vehicle rehabilitation,mechanical repairs,painting,fueling, lubrication, vehicle
cleaning operations, or airport deicing operations.
17. 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.
18. Waste Pile
Any non-containerized accumulation of solid,non-flowing waste that is used for
treatment or storage.