NCS000046_APPLICATION_20180403

-----STORIGIINATE R-DIVISION-CODING-SHEET
PERMIT NO.
NG���ti6
DOC TYPE
❑FINAL PERMIT
❑ MONITORING INFO
�bAPPLICATION
❑ COMPLIANCE
❑ OTHER
YYYYMMDD

* �,,,y�F'� Division of Energy, Mineral & Land Resources
.ii�� Land Quality 5ection/Stormwater Permitting
National Pollutant Discharge Elimination System
NCDENR
NWUWL FZ20LBM PERMIT NAME/OWNERSHIP CHANGE FORM
FOR AGENCY USE ONLY
Date ReceNed
Year Month
I Da
1. Please enter the permit number for which the change is requested.
NPDES Permit (or) Certificate of Coverage
' S Q 0 0 0 4 6 C G
II. Permit status prior to requested change.
a. Permit issued to (company name): Airgas Specials Gases, Inc. -
b. Person legally responsible for permit: Daniel Farris.
(P
..5 �irKii<9iTI�t'�1t3
c. Facility name (discharge):
d. Facility address:
e. Facility contact person:
First MI Last
Safety and Compliance Director
Title
630 United Drive
Permit Holder Mailing Address
Durham NC 27713
City State Zip
919 544-3773 [phone]
Phone Fax
Airgas Specialty Gases, Inc.
630 United Drive
Address
Durham NC 27713
City State Zip
Charlie Winston [phone]
First / MI / Last
Phone
III. Please provide the following for the requested
change (revised permit).
a. Request for change is a result of:
❑ Change in ownership of the facility
® Name change of the facility or owner
If other please explain: Legal Entity Name Change Only
^
b. Permit issued to (company name):
Airgas USA, LLC
c. Person legally responsible for permit:
Daniel
Farris
First
_
MI Last
Safety
And Compliance Director
Title
Airgas USA, LLC
Pennit holder Mailing Address
Durham
NC 27713
City
state Zip
[phone]
[e-mail]
Phone •
E-mail Address
d. Facility name (discharge):
Airgas USA, LLC
e. Facility address:
630 United Drive
Address
Durham
_NC 27713
City
State Zip
f. Facility contact person:
Charlie
Winston
First
Ml Last
[phone]
[e-mail]
Phone
E-mail'Address
IV. Permit contact information (if different from the person legally responsible for the permit)
P-A- A 1- 17 711A

NPDES PERMIT NAME/OWNERSHIP CHANGE FORM
Va0d2of2
Permit contact:
First MI Last
Title
Mailing Address
City State Zip
Phone E-mail Address
V. Will the permitted facility continue to conduct the same industrial activities conducted prior
to this ownership or name.change?
® Yes
❑ No (please explain)
VI. Required Items: THIS APPLICATION WILL BE RETURNED UNPROCESSED IF ITEMS
ARE INCOMPLETE OR MISSING:
❑ This completed application is required for both name change and/or ownership change
requests.
❑ Legal documentation of the transfer of ownership (such as relevant pages of a contract deed,
or a bill of sale) is required for an ownership change request. Articles of incorporation are
not sufficient for an ownership change.
The certifications below must be completed and signed by both the permit holder prior to the change, and
the new applicant in the case of an ownership change request, For a name change request, the signed
Applicant's Certification is sufficient.
PERMITTEE CERTIFICATION (Permit holder prior to ownership change):
1, Daniel Farris, attest that this application for a name/ownership change has been reviewed and is accurate
and complete to the best of my knowledge. I understand that if all required parts of this application are not
completed and that if all required supporting information is not included, this application package will be
ret d as incomplete.
4/13/2016
Signature Date
APPLICANT CERTIFICATION
1, Daniel Farris, attest that this application for a name/ownership change has been reviewed and is accurate
and complete to the best of my knowledge. I understand that if all required parts of this application are not
completed and that if all required supporting information is not included, this application package will be
re tu d as incomplete.
April 13, 2016
Signature Date
PLEASE SEND THE COMPLETE APPLICATION PACKAGE TO:
Division of Energy, Mineral and Land Resources
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
0e.A-4 1— 17 INA

Delaware
Palle 1
The First State
I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF
DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT
COPY OF THE CERTIFICATE OF MERGER, WHICH MERGES:
"AIRGAS SPECIALTY GASES, INC.«, A TEXAS CORPORATION,
WITH AND INTO "AIRGAS USA, LLC" UNDER THE NAME OF "AIRGAS
USA, LLC", A LIMITED LIABILITY COMPANY ORGANIZED AND EXISTING
UNDER THE LAWS OF THE STATE OF DELAWARE, AS RECEIVED AND FILED
IN THIS OFFICE ON THE TWENTY—THIRD DAY OF MARCH, A.D. 2016, AT
12:14 O'CLOCK P.M.
AND I DO HEREBY FURTHER CERTIFY THAT THE EFFECTIVE DATE OF
THE AFORESAID CERTIFICATE OF MERGER IS TIM FIRST DAY OF APRIL,
A.D. 2016 AT 12:02 O'CLOCK A.M.
.4
a
� 6 Q
5032015 8100M 4V
SU 20161823385
You may verify this certificate online at corp.delaware.gov/authver,shtml
7
Authentication: 202034377
Date: 03-23-16

ATTACHMENT A
ASG RESTRUCTURING SUMMARY
Airgas, Inc. is carrying out a restructuring of its operating companles. Currently, Airgas,
Inc. is the owner and parent company of Airgas Specialty Gases, Inc., a Texas
corporation ("ASGI, and Airgas USA, LLC, a Delaware limited liabilitycompany ("Airgas
USA'). Effective April 1, 2016, Airgas, Inc. will merge ASG into Airgas USA. Airgas,
Inc. is and will remain the sole member (owner) of Airgas USA. When the restructuring
is complete ASG will no longer be a separate legal entity and all of the business and
operations of ASG will be carried out by Airgas USA. The restructuring is illustrated
below.
Pre -Restructuring
AIrgas, Inc.
(Parent Company/Sole owner)
Post -Restructuring
Airgas, Inc.
(Parent Company/Sole Member)
Airgas USA, LLC I I Airgas specialty Gases, Inc. I I i Airgas USA, LLC

Permit Coverage er%Vrrrzd I.6T)AI `7bi
ATA Renewal ARRUcation Form NPDES Permit Number
NCMR National Pollutant Discharge Elimination System NCS000046
Stormwater Individual Permit
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information
* Address to which permit correspondence will be mailed
Owner / Organization Name:
Airgas Specialty Gases ^
Owner Contact:
Charlie Winston
Mailing Address:
630 United Dr.
Durham NC 27713
Phone Number:
919-544-3773
Fax Number:
919-544-3774
E-mail address:
[e-mail]
Facility Information
Facility Name:
Airgas Specialty Gases Durham
Facility Physical Address:
630 United Dr.
Durham NC 27713
Facility Contact:
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
Permit Information
Permit Contact:
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
Discharme Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls:
Facility/Activity Changes
separate sheet if necessary.
NO change in activities
Charlie Winston
630 United Dr.
Durham NC 27713
919-544-3773
919-544-3774
[e-mail]
Charlie Winston
630 United Dr.
Durham NC 27713
919-544-3773 ex 105
charlie.winston
UT of Northeast Creek
C
CaLFear
NSW stream
Please describe below any changes to your facility or activities since issuance of your permit. Attached a
Added second Carbon Dioxide storage tank and diesel additive over pack container
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is/true,, complete and accurate. c
Signature V� ✓YG C�2�-� !ti I.wa Date a O 'f
C
Print or type name of person signing above Title
SW Individual Permit Coverage Renewal
Please return this completed application form Stormwater Permitting Program
and requested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

Permit Coverage
QGA Renewal Application Form
"""-----�latie��al-i�allutartt BisefragetilimiaatiaF►-System NPDES Permit Number
I�G©EI�R 5tormwater Individual Permit NCS000046
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information
* Address to whlch permit correspondence will be mailed
Owner / Organization Name:
Air as Specialty Gases
Owner Contact:
Charlie Winston
Mailing Address:
630 United Dr.
Durham NC 27713
Phone Number:
919-544-3773
Fax Number:
919-544-3774
E-mail address:
[e-mail]
Facility Information
Facility Name:
Air as Specialty Gases Durham
Facility Physical Address:
630 United Dr.
Durham NC 27713
Facility Contact:
Charlie Winston
Mailing Address:
630 United Dr.
Durham NC 27713
Phone Number:
919-544-3773
Fax Number:
919-544-3774
E-mail address:
[e-mail]
Permit Information
Permit Contact:
Charlie Winston
Mailing Address:
630 United Dr.
Durham NC 27713
Phone Number:
919-544-3773 ex 105
Fax Number:
919-544-3774
E-mail address:
[e-mail]
Discharne Information
Receiving Stream: UT of Northeast Creek
Stream Class: C
Basin: Cape Fear
Sub -Basin: NSW stream
Number of Outfalls: 3
Facility/ Activity Change Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
NO change in activities
Added second Carbon Dioxide storage tank and diesel additive over pack container
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true, complete and accurate.
��
Signature �_L� Date a d r 14
Gharhp Winstnn _ Plant Manager _
Print or type name of person signing above Title
Please return this completed application form SW Individual Permit Coverage Renewal
and r Stormwater Permitting Program
equested supplemental information to: 1612 Mail Service Center
Raleigh, North Carolina 27699-1612

Al c 5 o o o d Y (0
SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
(Do not submit the site Stormwater Pollution Prevention Plan)
Initials
C'tJJ l . A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities (including storage of materials, disposal areas, process areas and
loading and unloading areas), drainage structures, drainage areas for each outfall,
building locations and impervious surfaces should be clearly noted.
2. A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data.
C 3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
parameters surveyed, observations, and date monitoring conducted.
�1 4. A summary of the Best Management Practices utilized at the permitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. Ifthe implementation of any BMP's is planned, please include
information on these BMP's.
CA-) 5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes, changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
(SCAJ 5. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal, then the last years monitoring results should be submitted
within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal
waiting on lab results)

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N[3DO0O46'Summary ofAnalytical Monitoring
77,
tj
121
77
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� | l —�----'---|--------------[-----------

ASG Durham NCS000046
Table 3. Benchmark Values for Analytical Monitoring
w Discharge Characteristics,;
G f Benchmarl.
_.:.-..Units'`
Total Suspended Solids. TSS
mg/L
100
Chemical Oxygen Demand;
mJL
120
COD
Nitrogen, Total
mall
30
Phosphorus, Total
mg/L
2
pH
standard
6-9

�
'im
NC3OOU046'Summary ofAnalytical Monitoring
COD
P
-------------
tic
COD
NI
to
No
AIw le

l�
ASG Durham NCS000046
Table I Benchmark Values for Analvfical Monitoring
.. ,Discharge ti'ar-'acA'e­";- r
Characteristics , .'�
ui�
Benchmark
Total Suspended Solids, TSS
ma/L
100
Chemical Oxygen Demand,
COD Oxygen
rn g/L
120
Nitrogen. Total
m or/ L
30
Phosphorus, Total
rntrYL
1
pH
standard
6-9

NCS000046 - Summary of Visual Monitoring
z
Parameters Observed
Observations
Dates Monitoring Conducted
{3i �,
ZRI
Outfall 1
1.75" rain over 3 hours
clear, no smell,
11/13/2009
Outfall 2
3.70"rain over 2 hours
clear, no oil
7/5/2011
Outfall 3
.9"rain over 2 hours
clear, no oil or foam
8/2/2013

NCS000046 - Summary of Visual Monitoring
Parameters Observed
Observations
Dates Monitoring Conducted
Outfall 1
1.75" rain over 3 hours
clear, no smell,
11/13/2009
Outfall 2
3.70"rain over 2 hours
clear, no oil
7/5/2011
Outfall 3
.Train over 2 hours
clear, no oil or foam
8/2/2013

NCS000046 ASG Durham
Best Management Practices at ASG Durham consist of monthly 59 item housekeeping inspection, a
quarterly 78 item physical conditions inspection. We use an Aerosolv system to puncture aerosol paint
cans and contain the residual before disposal. Burnt lights and spent batteries are sent to proper
disposal centers. Our used vacuum oil is collected and stored inside a containment room until sufficient
amount can be sent to proper reclamation facility. We have covered trash containers and daily remove
waste and debris from inside the facility. In addition we have universal spill kits positioned throughout
the facility.

NC5000046 ASG Durham
Best Management Practices at ASG Durham consist of monthly 59 item housekeeping inspection, a
quarterly 78 item physical conditions inspection. We use an Aerosolv system to puncture aerosol paint
cans and contain the residual before disposal. Burnt lights and spent batteries are sent to proper
disposal centers. Our used vacuum oil is collected and stored inside a containment room until sufficient
amount can be sent to proper reclamation facility. We have covered trash containers and -daily remove
waste and debris from inside the facility. In addition we have universal spill kits positioned throughout
the facility.

NCS000046 ASG Durham
Significant changes: At ASG Durham there been no changes neither addition nor deletion of work
processes, material handling, storage or raw materials used.

NCS000046 ASG Durham
Significant changes: At ASG Durham there been no changes neither addition nor deletion of work
processes, material handling, storage or raw materials used.

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources - Storm water Permitting
Facility Name:
Permit Number:
Location Address:
County:
D v rN0. Inc:,
" I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP_
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
µ •�, �.. s 3F E y. i4 ,r.s ri.. f- e g
,�S�gn,(accvr�ding�tvE perm><t signatgry,=rer�u�rements} and return,'ti��s;�Certifcat�an r�DO�NO�T' ;`7��{,'
a'SENDS'T4RMWATER+POLLUTION TPREENTION�PLAN�WIT�HuTHISF@ERIFIG` `'LION°
Signature � GW U L w t"ka, _ Oate '-A . 0. . Zb Ili
W1fn5Y0y\ 7k 0. r
Print or type name of person signing above Title
SPPP Certification 10113

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources - Stormiwater Permitting
Facility Name:
Permit Number:
Location Address:
County: D U
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
_} - f 1. 2 'g
FSign;(accordtn'g to permit signatory requirements} andrret.urn-;thtsICertificahon -iD0"-3NOT, .H,�
x
]SEND STORMWATER POLLUTION PREVENTION;.PLAN-W#-IW T i S�.CERTIFkICAATION
Signature ��•.G�,c �`�. _
(,�rlC,f1,-e \I)t+1-1bY�v,
Print or type name of person signing above
12 c�f9WR
JUL 1 6 2014
orcw - W—AQUALIFY
Date a , b
7� n
Title
SPPP Certification 10l13

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
May 10, 1999
GERALD S CARVER
NATIONAL SPECIALTY GASES
PO BOX 12013
RESEARCH TRIANGLE PARK, NC 27709
1kTWA
r••
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Stormwater Permit Renewal
National Specialty Gases
Permit Number NCS000046
Durham County
Dear Permittee:
Your facility is currently covered for stormwater discharge under NPDES Permit NCS000046- This permit expires
on November 30. 1999. In order to assure your continued coverage under your permit, you must apply to the
Division of Water Quality (DWQ) for renewal of your permit. To make this renewal process easier, we are
informing you in advance that your permit will be expiring. Enclosed you will find an individual permit renewal
application form, supplemental information request, and Stormwater Pollution Prevention Plan certification. Filing
the application form along with the requested supplimental information will constitute your application for renewal
of your permit. The application form must be completed and returned along with all requested information by June
14, 1999 in order to constitute a timely renewal filing.
Recent legislation modified the fee structure for DWQ permits. Renewal fees have been eliminated and annual fees
have been changed. The new annual fee for your permit is now $715.00 (you will be invoiced later this year for
your annual fee.) A copy of the new fee schedule is enclosed in this package.
Failure to request renewal by June 14, 1999 may result in a civil assessment of at least $250.00. Larger penalties
may be assessed depending on the delinquency of the request. Discharge of stormwater from your facility without
coverage under a valid stormwater NPDES permit would constitute a violation of NCGS 143-215.1 and could
result in assessments of civil penalties of up to $10,000 per day.
If you have any questions regarding the permit renewal procedures please contact Tony Evans of the Stormwater
and General Permits Unit at [phone], ext. 584.
Sincerely,
Bradley Bennett, Supervisor
Stormwater and General Permits Unit
cc: Central Files
Stormwater and General Permits Unit Files
Raleigh Regional Office
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

it
RECE1 VE,0
SEP 19 701,
aafergfRe9 n 7
Environmental 5ervices,Group Incorporated
Safety / Health / Environmental / Aegulatory Services
WindRiver Office Building, Suite 260
2300 Cottondale bane
Little Rock, AR 72202
[phone] Telephone
Toil Free 1-800-887-6752
[phone] Facsimile
September 9, 2011
Mr. Mack Wiggins
Environment Specialist
North Carolina Department of Environment
and Natural Resources
Division of Water Quality
RE: Stormwater Compliance Evaluation Inspection
Airgas Specialty Gases
Permit No.: NCS000046
Durham County, NC '
Feasibility Study, Part II, Section A, 2(a)
Dear Mr. Wiggins,
As per Part II, Section A, 2(a), Airgas Specialty Gases will implement the actions entailed in this
provision. Airgas Specialty Gases will seek methods to reduce the exposure of materials and
processes to the storm water.
Airgas Specialty Gases will move cylinder storage out of flow path of storm water to covered
areas around the outside of the plant and will, when practical and space permits, to move
cylinders inside the plant. Other cylinders will be situated so that they do not interfere with the
flow of storm water exiting the facility.
Airgas Specialty Gases will explore the possibility of constructing additional covered areas to
increase their non -storm water contact areas where feasible. This proposed construction will be
introduced in Mr. Winston's capital improvements schedules and will phase in this proposal
over a 3 to 5 year period.
-1-

PART H - MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
SECTION A: STORMWATER POLLUTION PREVENTION PLAN
2. STORMWATER MANAGEMENT PLAN
Control or minimization of the exposure of significant materials to stormwater, including
structural and nonstructural measures
(a) FEASIBILITY STUDY
Review of the technical and economic feasibility of changing the methods of operations
and/or storage practices to eliminate or reduce exposure of materials and processes to
stormwater. Where practical, the facility shall prevent exposure of all storage areas,
material handling operations, and manufacturing or fueling operations. In areas where
elimination of exposure is not practical, the stormwater plan shall document the
feasibility of diverting the stormwater runoff away from areas of potential contamination.
(b) RELOCATION OF CYLINDERS
All cylinders will be stored on pallets under covered areas where practical.
Cylinders will be stored in such a manner as to not come in contact with stormwater flow.
All debris will be picked up and deposited in the appropriate waste containers and will be
recycled when possible.
All areas will be kept in a clean, swept -up condition and waste disposed of properly.
(c) PHYSICAL IlVIPROVEMENTS
Airgas Specialty Gases will study their current facility and develop a plan for the
potential of construction of additional covered areas to increase their non -contact
exposure to runoff. This proposal.should be implemented over a period of 5 years and
will require approval of Airgas, Inc.
- IIA 2(a) -

Mr. Wiggins, as you know, ASG is a gas distribution facility. The nature of these gases are such
that a leak or rupture is unlikely to reach the ground surface due to the evaporation of the gas
when it is released, therefore, contamination to the surface would be minimal.
Enclosed are the original site plan and a revised site plan that shows revisions to the facility and
areas where cylinder storage has been relocated. Also included, is pertinent information that
will outline the necessary actions to maintain implementation of the "Feasibility Study".
Airgas Specialty Gases, Durham County, North Carolina, strives to meet all state and
federal regulations and to be a conscientious, safe and environmentally sound corporate citizen
of the state of North Carolina.
Sincerely, Q-lZ- 11
Kenneth Jones
Environment Services Group, Inc.
Project Manager
[e-mail]
Enc: Site Drainage No. 1- With removed areas
Site Drainage No. 2- New map showing existing facility
x G� �. Date 9. I5*. Zr)7!
Charlie Winston
Facility Manager
Airgas Specialty Gases
Durham County; NC
-2-

wr. Charlie, Winston, Plant Manager
Airgas Specialty Gases
August 29.2011 E E I V E D"'
SEP 19 2011
Rate
I. Requirements: '9 Reg n��0#Iice
1. Please send the latest analytical results and perform Analytical monitoring as required by Part
II, Section B of your individual permit NCS000046. Please send in the results to the Raleigh
Regional Office, Surface Water Protection, 1628 Mail Service Center, Raleigh, NC 27699-
1628. Please use the attached form provided by the Division of Water Quality.
2. Please address and incorporate the feasibility study in your plan as required by Part Il, Section
A, 2 (A). of your individbal permit NCS000046.
3. Document in your plan the date your plan was updated annually and provide a signature.
Please address items No. 1(1, 2, 3, ) in a written response within 30 days of receipt of this letter. Thanks for
your cooperation during the inspection. If you or your staff have any questions, please call me at
{919)791-4200.
Sincerely,
Mack Wiggins
Environmental Specialist
cc: Central Files
RRO File
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r NATIONAL WELDERS
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FIGURE 2

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MUSTRIAL DRAINAGE AREAS
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AREA (ACRES)
PERVIOUS (%)
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NATIONAL WELDERS
— —'—L•--------.--._—..__._- _. DURHAM, NORTH CAROLIN
—.. _..----••_•-------..—..------.—.---..�..----_—.._J fCAIL AN�ROdD(M: oRAIIN
� AlIOUST 7004

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS O O Q 0 Lk\D
FACILITY NAM
EA ►11.G:�[ � aosasbkk �,, C-sr,f
PERSON COLLECTING MPLE(N) � ►w i..
CERTIFIEDLABORATORY(S) _bjy ftw►&yiW I Lab CA3
(r��er�twr. l =we. Lab #
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR:
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives
stthe
'sampling results from the laboratory.)
COUNTY ,�
PHONE NO. 8 1
1�! Y4 317-S - -_
r & fL_-
( GNATURE OF PERMITTEE OR DESIGNEE)
By this signature, I certify that this report is accurate
complete to the best of my knowledge.
.. .
Outfall Date- '50050 y_,
No: , Sample :Total Total.'; f
r
Collected Flow if app.). Rainfall 3
maldd/ r.;., MG inches,`'
Woo t S. L-1 . Zol � . (.o
ri M,
L1.
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _ yes )�I_no
(if yes, complete Part 13)
Outfalh
No..
Date ''
Sample
'50050
00556
00530
00400
Total Flow
Total
Oil &.Grease
Non -polar
Total
VII
New Motor
Collected
(if applicable).
;Rainfall..:..
(if,appl:). ,
O&G/TPH-
Suspended
Oil Usage
F
(Method I664:
,Solids
SGT=HEM), if ,
app1:
mo/ddlvr
MG I
inches
mUl '.;
ma/l ::.
unit:.: .:
gaUmo
Form SWU-247-062310
Page I of 2

STORM EVENT CHARACTERISTICS:
Date 2.V. ZD1'1 ti
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Maii Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a
system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person
or. persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best
of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
(Signature of Permittee) (Date)
Form SWU-247-062310
Page 2 of 2

rA
_�uu UUUIII ����
.� SEP 1.9 2411
Jo
11)
Stormwater Discharge Outfall (SDO 9h��g�o�a
g ) OFAC
Qualitative Monitoring Report
For guidance on filling out this form, please visit: httn://h2o.enr.state.ne.us/su/Forms Documents.htm#miscforms
Permit No.: NICI $ /010/ 0/ 0141%l or Certificate of Coverage No.: N/C/G/ l—1 I_l / l
Facility Name: Ai r9c6sSec, Es
County- v+r1. Phone No. IA - sq,4.377 3
Inspector: Ck* A,► - llll %v%Sto-r.
Date of Inspection: S • ZG • ZO ti
Time of Inspection: 1, 40 1: tiy
Total Event Precipitation (inches):
60
Was this a Representative Storm Event? (See information below) ® Yes ❑ No
Please check your permit to verify if Qualitative Monitoring must be performed during a representative
storm event (requirements vary).
A "Representative Storm Event" is a storm event that measures greater than 0.1 inches of rainfall and that
is preceded by at least 72 hours (3 days) in which no storm event measuring greater than 0.1 inches has
occurred. A single storm event may contain up to 10 consecutive hours of no precipitation.
By this signature, I certify that this report is accurate and complete to the best of my knowledge:
(Signature of Permittee or Designee)
1. OutfA Description: /
Outfall No. I Structure (pipe, ditch, etc.) SA4 160 cft' C' lh Nar ec..t CeYfser
Receiving Stream:of
Describe the industrial activities that occur within the outfall drainage area: ZUt- c,G.S .s%or�L
2. Color: Describe the color of the discharge using basic colors (red, brown, blue, etc.) and tint
(light, medium, dark) as descriptors: _ r UA.. rr
3. Odor: Describe any distinct odors that the discharge may have (i.e., smells strongly of oil, weak
chlorine odor, etc.)-. rrldn,e.
Page 1 of 2
SWU-242-112606

4. Clarity: Choose the number which best describes the clarity of the discharge, where 1 is clear
and 5 is very cloudy:
2 3 4 5
5. Floating Solids: Choose the number which best describes the amount of floating solids in the
stormwater discharge, where 1 is no solids and 5 is the surface covered with floating solids:
01 2 3 4 5
6. Suspended Solids: Choose the number which best describes the amount of suspended solids in
the stormwater discharge, where 1 is no solids and 5 is extremely muddy:
© 2 3 4 5
7. Is there any foam in the stormwater discharge? Yes vo
S. Is there an oil sheen in the stormwater discharge? Yes 0
9. Is there evidence of erosion or deposition at the outfall? es No
10. Other Obvious Indicators of Stormwater Pollution:
List and describe
Note: Low clarity, high solids, and/or the presence of foam, oil sheen, or erosion/deposition may be
indicative of pollutant exposure. These conditions warrant further investigation.
Page 2 of 2
Swi7-242-112608

North Carolina Division of Water Quality - Stormwater Permitting Unit
Facility Name: Airgas Speciality Gases
Permit Number: NCS000046
Location Address: 630 United Dr
Durham, NORTH_ CAROLINA 27713
County: Durham
SFP
�al�, �cD 19 Z411
9h1��,9in �h�
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments were
developed and implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information
gathered is, to the best of my knowledge and belief, true, accurate and complete."
-And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the terms and conditions of the stormwater discharge
permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory,reguirements)and,return this Certification4 DO,.NOT
SEND STORMWATER-POLLUTION'PREVENTION PLAN WITH, THIS CERTIFICATION:
Signature
(�U.L W ► ;lmr� r
Print or type name of person signing above
Date
Title
SPPP Certification 5/09

Environmental Conservation Laboratories, Inc.
102-A Woodwinds industrial Court
Cary NC, 27511 -
Phone: [phone] FAX. [phone]
Monday, tune 13, 2011
Airgas Specialty Gases (AI007)
Attn: Charlie Winston
630 United Drive
Durham, NC 27713
RE: Laboratory Results for
Project Number: [none], Project Name/Desc: Wastewater
ENCO Workorder. COO9873
Dear Charlie Winston,
Enclosed is a copy of your laboratory report for test samples received by our laboratory on
Friday, May 27, 2011.
Unless otherwise noted in an attached project narrative, all samples were received in
acceptable condition and processed in accordance with the referenced methods/procedures.
Results for these procedures apply only to the samples as submitted.
The analytical results contained in this report are in compliance with NELAC standards, except
as noted in the project narrative. This report shall not be reproduced except in full, without
the written approval of the Laboratory.
This report contains only those analyses performed by Environmental Conservation
Laboratories. Unless otherwise noted, all analyses were performed at ENCO Cary. Data from
outside organizations will be reported under separate cover.
If you have any questions or require further information, please do not hesitate to contact me.
Sincerely,
Bill Scott
Project Manager
Enclosure(s)
The total number of pages in this report, including this page is 12.
�! i �ao
www.encolabs.com

�C=j
www.encolabs.com
SAMPLE SUMMARY/LABORATORY CHRONICLE
,gieystID.: .- SW001 _
-. .. _. _i.abID:rC0D96Z3.pf
SampledvD5/27J11-11t45 iteoeivedd�O5L27/14;13:22
Parameter
Hold Date/rme(s)
Prep Date/Time(s)
Analysis Date/Time(s)
.............. . .......
EPA 350.1
06/24/11
06/03/11 10:27
6/3/2011 12:27
EPA 351.2
06/24/11
06/01/11 10:22
6/2/2011 06:34
EPA 353.2
06/24/11
05/29/11 16:33
5/29/2011 19:25
EPA 365.4
06/24/11
06/01/11 1022
6/2/2011 08:55
SM 2540D
06/03/11
06/02/11 12:45
6/2/2011 12:45
SM 5220D
06/24/11
06/01/11 10:56
6/1/2011 15:08
SM4500-H/B
05/27/11 11:59
05/31/11 10:41
5/31/2011 10:41
Parameter
Hold Date/Time(s)
Prep Date/Time(s)
Analysis Date/Time(s)
EPA 350.1
06/24/11
W03111
10:27
6/3/2011 12:33
EPA 351,2
06/24/11
06/01/11
10:22
6/2/2011 06:37
EPA 353.2
06/24/11
05/29/11
16:33
5/29/2011 19:31
EPA 365A
06/24/11
06/01/11
10:22
6/2/2011 08:56
5M 2540D
06/03/11
06/02/11
12:45
6/2/2011 12:45
SM 5220D
06/24/11
06/01/11
10:56
6/1/2011 15:08
SM45OD•HIB
05/27/11 12:14
05/31/11
10:41
5/31/2011 10:41
Parameter
Hold Date/Time(s)
Prep Date/Time(s)
Analysis Date/Time(s)
EPA 350.1
06/24/11
06/03/11
10:27
6/3/2011 12:35
EPA 351.2
06/24/11
06/01/11
10:22
6/2/2011 06:39
EPA 353.2
06/24/11
05/29/11
16:33
5/29/2011 19:33
EPA 365.4
06/24/11
06/01/11
1012
6/2/2011 08:58
SM 2540D
06/03/11
06/02/11
12:45
6/2/2011 12:45
SM 5220D
06/24/11
06/01/11
10:56
6/1/2011 15:08
5144500-H/B
05/27/11 12:19
05/31/11
10:41
5/31/2011 10:41
Page 2 of 12

www.encolabs.com
r
AMPLE DETECTION SUMMARY
Analyte
Results Flag MDL
PQL
Units
Method Notes
Ammonia as N
0.31 0.D45
0.10
mg/L
EPA 350.1
Chemical Oxygen Demand
17 10
10
mg/L
SM 5220D
Nitrate/Nitrite as N
0.31 0.025
0.10
mg/L
EPA 353.2
PH
6.6 1.0
1.0
PH Units
SM450D-H/8 Q
Total Kjeldahl Nitrogen
0.57 0.16
0.48
mg/L
EPA 351.2
Total Suspended Solids
2.0 1.0
1.0
mg/L
5M 2540D
ient SW002
iati gn!373P02
Analyte
Results
Flag MDL PQL
Units
Method Notes
Ammonia as N
0.33
0.045 0.10
mg/L
EPA 350.1
Chemical Oxygen Demand
21
10 10
mg/L
SM 5220D
NitrateJNdrite as N
0.30
0.025 0.10
mg/L
EPA 353.2
PH
4.1
1.0 1.0
PH Units
SM4500•1-1/13 Q
Phosphorus
0.022
] 0.021 0.10
mg/L
EPA 365.4
Total Kjeldahl Nitrogen
0.57
0.16 0.48
mg/L
EPA 351.2
Total Suspended Solids
2.4
1.0 1.0
mg/L
SM 2540D
lent ID: 311YD0.3
Lab'ID�CA09873'03
Analyte
Results
Flag MDL
PQL
Units
Method Notes
Ammonia as N
0.32
0.D45
0.10
mg/L
EPA 350.1
Chemical Oxygen Demand
14
10
10
mg/L
SM 5220D
Nitrate/Nitrite as N
0.28
0.025
0.10
mg/L
EPA 353.2
PH
4.0
1.0
1.0
PH Units
SM4500-H/e Q
Total Kjeldahl Nitrogen
0.60
0.16
0.48
mg/L
EPA 351.2
Total Suspended Solids
2.0
1.0
1.0
mg/L
SM 2540D
Page 3 of 12

www.encolabs.com
ANALYTICAL RESULTS
Description: SW001
Lab Sample I0: 0009873-01
Received: 05/27/11 13.22
Matrix: Water
Sampled: 05/27/11 11:45
Work Order: 0009873
Project: Wastewater
Sampled By: Charlie Winston
Classical Chemistry Parameters
^ ENCO Cary cerahed analyte (NC 5911
Anaitrte 1CA5 Numbed
Results &1 9
Units
gE
"a tM Batch
Method
AnpIvsed
Dr Notes
Ammonia as N [7664-41-7) ^
0.31
mg/L
1
0.045 0.10 1FD3018
EPA 350.1
06/03/11 12:27
A16
Chemical Oxygen Demand [ELL-00353
n
17
mg/L
1
10 10 IF01009
SM 5220D
06/D1/11 15:08
"
JOC
Nitrate/nitrite its N [ECL-0010] ^
0.31
mg/L
1
0.025 0.10 1E29001
EPA 353.2
05/29/11 19:25
CCB
pH [ECL-0062] ^
6.6
pH Unra
1
1.0 1.0 1E31010
SM45DD-H/6
05/31/11 10:41
KU Q
Nvkq*mms (7723-14-01 ^
NO
mg/L
1
0.021 0.10 1E31032
EPA 365.4
06/02/11 06:55
CCB
Total Kjeldahl Nitrogen [ECL-0162] ^
0.57
ng/1
1
0.16 0.48 1E31031
EPA 351.2
06/02/11 06:34
CCB
Total Suspended SoOds [ECL-0169] A
2.0
mg/L
1
1.0 1.0 1F02023
SM 2S40D
- 06/02/11 12:15
KLJ
Tha report relates ar11y to the sample as reo°Ned by the laboratory, and may poly be reproduced M full.
Page 4 of 12

ra �
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Description: 5WO02
Lab Sample ID: C009873-02
Received: 05/27/11 13:22
Matrix: Water
Sampled: 05/27/11 12:00
Work Order. C009873
Project: Wastewater
Sampled By: Charlie Winston
Classicai Chemistry Parameters
^ - ENCO Cary mr0fied anaW [NC 591]
Analvte LC r Mumber_i
Results
fag Up -it,
12F
HPL 131
Batch
Meth
Analyzed
gy Notes
Ammonia as N 17664-41.71 ^
0.33
mg/L
1
0.045 0A0
IF03018
EPA 350.1
06/03/11 12:33
A1B
Chemical Oxygen demand [ECL-00351
21
mg/L
1
10 10
IF01009
SM 5220D
06101/1I 15:08
30C
Ntaate/Nltrite as N [ECL-0010] ^
0.30
mg/L
1
0.025 0.10
1E29061
EPA 353.2
05129/11 19:31
CC9
pH [EC3-0062] ^
4.1
pH Units
1
1.0 1.0
1E31010
SM1500-RIB
05131/11 10:41
KL) Q
Phosphorus [7723-14.0] ^
0.022
3 mg/L
1
0.021 0.10
1E31032
EPA 365.4
06102/11 08:56
CC8
Total Kieldahl Nitrogen [ECL-01621 ^
0S7
mg1L
1
0.16 0.48
1E31031
EPA 351.2
06102/11 06:37
CCB
Total Suspended Solids (ECL-01691 ^
2.4
mg/L
1
1.0 lA
IF02023
SM 2540D
06/02111 12:45
KLl
This report relates only to the sample as received by the laboratory, and may only be reproduced in fun.
Page 5 of 12

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Description: SWO03
Lab Sample ID: C009873-03
Received: 05/27/11 13:22
Matrix: Water
Sampled: 05/27/11 12:05
Work Order. C009873
Project: Wastewater
Sampled By: Charlie Winston
Classical Chemistry Parameters
.-.
. ..
^ • ENCO Cary -Mfied anaW (NC 5911
AnandW fCM NumberlResults
Flag
1Dnits
PIF
MDL MRL, Batch
Mdbod
Analp—edNo
s
Ammonia as N [7664-41-71 ^
0.32
mg/L
1
0.045 0.10 1FO3018
EPA 350.1
, 06/03111 12:35
AjB
Chemical oxygen Demand [ECL-00351
19
rnWL
1
10 10 11,01009
SM 5220D
06/01/11 15:08
]oC
NltratetNitrito as N [ECL-00101 ^
0.28
mg/L
1
0.025 0.10 1E29DD1
EPA 353,2
05/29/11 19:33
CC8
PH [ECL-00621 ^
4.0
pH Unfts
1
1,0 1.0 SE31010
SM45DD•HIB
05j31111 10:41
KU Q
AMphons [7723-14-01 A
ND
mg/L
1
0.021 0.1D 1E31032
EPA 365.4
06/02/11 DB:58
CCB
Total Kjeldahl Nitrogen [ECL-01621 ^
0.60
mg/L
1
D.16 0.48 1E31031
EPA 351.2
06/02/11 06:39
CCB
Total Suspended Solids [ECL-0169] A.
2.0
mg/L
1
1.D 1.0 1FO2023
5M 2540D
06/02I11 12:45
KL3
This report relates only to the sample as nxxlved by the laboratory, and may only be reproduced in full.
Page 6 of 12

(9E�I
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UALM C R L
Classical Chemistry Parameters - Quality Control
Batch IE29001 - NO PREP
Blank (1E29001-BLK1) Prepared: 05/29/2011 16:33 Analyzed: 05/29/2011 19:20
Nitrate/ft to as N 0.025 U 0.10 mglL
LCS (3E29001-BSI) Prepared: 05/29/2011 16:33 Analyzed: 05/29/2011 19:23
Ni rate/Nitnte as N 1.3 0.10 mg/L 1.25 103 90-110
Matrix Spike (1E290D1-MS1) Prepared: 05/29/2011 16:33 Analyzed: 05/29/2011 19:27
Source: 0009873-01
Nitrate Wite as N 0.85 0.10 mg/L 0.513 0.31 105 90-110
Matrix Spike Dup (IE29001-MSD1) Prepared: 05/29/2011 15:33 Analyzed: 05/29/2011 19:29
Source: C009873-01
N%a"i r to as N
0.84 0.10 m9A 0.513 0.31 103 90-110 0.9 10
Batch 1E31010 - NO PREP
LCS (1E31010-BSI)
Prepared & Analyzed: 05/31/2011 10:41
}
.
—C
SLi Notes
Arlalyte_.
Result Fla ' MRL iJnits r' Result a/oREC RPD LRimit
9
PH
7.1 1.0 pH Units 7.00 101 99-101
Duplicate (3E310I0-DUP3)
Prepared & Analyzed: 05/31/2011 10:41
Source: 0009873-01
PH 6.7 1.0 pH Untts 6.6 2 25
Batch IE31031 - Same
Blank (1E31031-BLKi) Prepared: 06/0112011 10:22 Analyzed: 06/02/2011 06:26
~ Spike. Source %REC RPD
itesult Fla "MIRE Units - %3tEC` Lirortsx: RPD`._.. LtroY ewl[ob s' iyte g-- - . tetrel Results — ,
-- - - ---
Tatal KjeldaN Nbogen 0.16 U 0.48 mg/L
LCS (1E31031-BSI) prepared: 06/01/2011 10:22 Analyzed: 06/02/2011 06:28
Total KjetdaN NiUagen 12 0.48 mg/L 12.0 101 90.110
Matrix Spike (1E31031-MS3) Prepared: 06/01/2011 10:22 Analyzed: 06/02/2D11 D6:30
Source:0009873-01
Page 7 of 12

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QUALITY CONTROL
Classical Chemistry Parameters - Quality Control
Batch IE31031 - Same
Matrix Spike (1E31031-MS3) Continued Prepared: 06/01/2011 10:22 Analyzed: 06/02/2011 06:30
Source:0009873-01
Total KjeJdahl Nitrogen 5.4 0.48 nI 4.80 0.57 300 90-110
Matrix Spike Dup (1E31031-MSD1) Prepared: 06/01/2011 10:22 Analyzed: 06/02/2011 06:32
Source.CD09873-01
Spike Source F ."/aREC. RPD
/lnalyte Result. Flag MRL ... .Units' .: Level �`%REC l imits�RPDJ Unit Notes
Total Kjeldahl Nitogen 53 0.48 mg/L 4.80 0.57 99 90-110 2 10 �^
Batch IE31032 - Same
Blank (1E31032-BLKI) Prepared: D5/0112011 10:22 Analyzed: 06/02/2011 08:48
Phosphors 0.021 U 0.10 mg/L
LCS (1E31032-BSI) Prepared: 06/01/2011 10:22 Analyzed: 06/02/2011 0B:49
Phasphones 1.5 0.10 mg/L 1.60 95 80-120
Matrix Spike (1E31032-MSi) Prepared: 06/01/2011 10:2.2 Analyzed: 06/02/2011 08:51
Source: C009873.01
Plwsphorus U3 0.10
mg/L 0.640 0.021 U 98 80.120
Matrix Spike Dup (1E31032-MSDS)
Prepared: 06/01/2011 10:22 Analyzed: 06/02/2011 08:53
Sourm:0009873.3.
1TISpike
Sour X %REC RPD F-FZQLN@otjes�j
Anayyte itesrllt Flag MRL -
1lnits Laver Re.lt ,% E! Limits, RPD Limit . -
Phosphorus 0.62 0.10
mg/L 0.640 0.021 U 97 80-120 1 25
Batch IF01009 - Same
Blank (11`01009-BLK1)
Prepared:06101/2011 10:56 Analyzed: 06/01/2011 15:08
Chemical Daygen Demand 10 U 10 rr-I
LCS (1F01009-BS1) Prepared: 06101/201110:56 Analyzed: 06/01/2011 15:08
..� _ "Spike . t 5 roe ._ °%REG' RPD
Atiatyte - ReseelY�Flag MRL' t►:ni9 Levei `_ Re .It�,y/oREC l: RS &"; RPD �� Llmit� � ;Notes
Chemical Cnygen Demand 510 10 mg/L 500 102 90-110 ..,
Matrix Spike (IF01009-MSi) Prepared: 06/01/2011 10:56 Analyzed: 06/Dl/2011 15:08
Page 8 of 12

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UALITY CONTRO
Classical Chemistry Parameters - Quality Control
Batch I F01009 - Same
Matrix Spike (1F01009-MSI) Continued Prepared: 06/01/2011 10:56 Analyzed: 06/01/2011 15:08
Source: 0009873-01
Chemkal Oxygen Demand 530 10 mg/L 500 17 103 90-110
Matrix Spike Dup (1F01009-MSD1) Prepared: 06/01/2011 10:56 Analyzed: 06101t2011 15:08
Source: C009873-01
r 5p1ke Sounoe %REC 1tPD
Airaiyte ' - ` Re%dilt Flag MRL�� Units_ Level :Result %RFC Limits RPD limit Notes�.m,
Chermiral Oxygen Demand 530 1D mg/L 500 17 103 90-110 0 10
Batch 1F02023 - NO PREP
Blank (1FO2023-BLKI) Prepared & Analyzed: 06/02/2011 12:45
Toot 5esparded SoWs 1.0 U 1.0 mg/L
LCS (IF02023-BSI) Prepared & Analyzed: D6/02/2011 12:45
Total Suspended Solids 92 1.0 mg/L 80.0 115 90-122
Duplicate (IF02023-DUPI) Prepared & Analyzed: 06/02/2011 12:45
source: C009873-01
Total Rmpended Son& 1.6 1.0 mg/L 2.D 22 25
...........
Batch IF03018 - NO PREP
Blank (IF03018-BLK1) Prepared: 06/03/2011 10:27 Analyzed: 06/03/2011 11:44
Amnrorda as N 0.04S U 030 mg/L
LCS (IF03018-BSI) Prepared: 06/03/2011 10:27 Analyzed: 06/03/2011 11:45
� Spike Source '�` 'yr %REC RPD _
+/1 T'tplAhe?.WY121r6: p'F-"�
Arralyle 6dt t � ltesult,•Kt 1.Flag NIRL",%, -$,,,Uhlis Level Results ,%°REC ;:ilJmits �-,RPD P . „iar`ni -- Notes
Ammonia as N 0.94 0.10 mg/L 1.00 94 90-110
Matrix Spike (IF03016-MSI) Prepared: 06/03/2011 10:27 Analyzed: 06/03/2011 12:29
Source: C009873-01
Amrnoria as N 0.66 0.10 mg/L 0.389 0.31 90 90-110
Matrix Spike Dup (1F03018-MSDI) Prepared: 06/03/2011 10:27 Analyzed: 06/03/2011 12:31
Page 9 of 12

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QUALITY CONTRQL
Classical Chemistry Parameters - Quality Control
Batch IF03018 - NO PREP
Matrix Spike Dup (1F03018-MSD1) Continued Prepared: 06/03/2011 10:27 Analyzed: 06/03/2011 12:31
Source:C009873-01
Ammonia as N
0.67 0.10 mg/L 0.389 0.31 92 90-110 1 10
Page 10 of 12

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FLAGSINOTES AND DEFINITION
B The analyte was detected in the associated method blank.
D The sample was analyzed at dilution.
] The reported value is between the laboratory method detection limit (MDL) and the laboratory method
reporting limit (MRL), adjusted for actual sample preparation data and moisture content, where applicable.
U The analyte was analyzed for but not detected to the level shown, adjusted for actual sample preparation
data and moisture content, where applicable.
E The concentration indicated for this analyte is an estimated value above the calibration range of the
instrument. This value is considered an estimate.
MRL Method Reporting Limit The MILL is roughly equivalent to the practical quantitation limit (PQL) and is
based on the low point of the calibration curve, when applicable, sample preparation factor, dilution
-factor, and, in the case of soil samples, moisture content.
ND The analyte was analyzed for but not detected to the level shown, adjusted for actual sample preparation
data and moisture content, where applicable.
Q Analysis performed outside of method - specified holding time.
Page 1 I of 12

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INCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Cole' eh H. Sullins Dee Freeman
Governor Director Secretary
November 16, 2009 .
Mr. Charlie Winston
Airgas Specialty Gases
630 United Drive
Durham, North Carolina 27713
Subject: Draft NPDES Stormwater Permit
Permit No. NCS000046
ASG Durham
Durham County
Dear Mr. Winston:
Enclosed with this letter is a copy of the draft stormwater permit for your facility.- Please review the draft
very carefully to ensure thorough understanding of the conditions and requirements it contains.
The draft permit contains the following significant changes from this facility's current permit:
Analytical monitoring changes:
1. Analytical monitoring parameters have been added to this permit based on the classification and
impairment of the stream discharged to. Nitrogen and Phosphorus have been carried over from the last
permit term. Total Suspended Solids and Chemical Oxygen Demand have been added.
2. pH has been added to the analytical monitoring requirements based on DWQ's current monitoring
stragtegy. -
3. All analytical monitoring has been set to semi-annually during.a representative storm event as defined in
Part lI Section B. The permittee must also document the total precipitation for each event. If no discharge
occurs during the sampling period, the permittee must submit a monitoring report indicating "No Flow"
within 30 days of the end of the six-month sampling period. Additionally, samples must be taken a
minimum of 60 days apart, as specified in Table 2.. '
4. Benchmarks for analytical monitoring have been added to this draft permit. Exceedances of benchmark
values require the permittee to increase monitoring, increase management actions, increase record
keeping, and/or install stormwater Best Management Practices (BMPs) in a tiered program. If the
sampling results are above a benchmark value, or outside of the benchmark range, for any parameter at
any outfall then the facility shall follow the Tier 1 guidelines which require a facility inspectionwithin
two weeks and implementation of a mitigation plan within two months. If during the term of this permit,
the sampling results are above the benchmark values, or outside of the benchmark range, for any specific
parameter at a specific discharge outfall two times in a row (consecutive), then the facility shall follow the
Tier 2 guidelines whdch require a repetition of the steps listed for Tier 1 and also immediately institute
monthly monitoring for all parameters at every outfall where a sampling result exceeded the benchmark
value for two consecutive samples.
5. You are required to collect all of the analytical and qualitative monitoring samples during representative
storm events as defined in Part 11 Section B. Qualitative monitoring is required regardless of
representative outfall status.
Wetlands and 5tonnwater Branch One
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 NDL Li1Carolina
Location: 512 N. Salisbury FAX
St. Ra 07- North Carolina r27604
Service:
Phone: 919-8()7�301} 1 FA)(: 919SD7-64941 Customer 5ervioe: 1$T7-623-6748 `
Intemet: www.newaterquality.org
An Equal Opportunity 1 Affirmative Action Employer

Mr. Charlie Winston
Airgas Specialty Gases
Permit No. NCS000046
•
6. You are responsible for all monitoring until the renewal permit is issued. See Footnote 1 of Tables 1, 4,
and.5.
7. The.flow.reporting requirement has been removed per DWQ revised strategy. (The total rainfall
parameter is in this permit, however.)
8. Vehicle maintenance monitoring has been revised to semi-annually in order to coincide with analytical
and qualitative monitoring. Monitoring for TPH has replace. Oil & Grease. This requirement appears in
all Individual Stormwater permits, however it only applies to facilities that do vehicle maintenance. If the
facility begins vehicle maintenance during the permitted timeframe then the requirements shall apply.
_Other _permit changes:
1. Additional. guidance is provided about the Site Plan requirements. The site map must now identify if the
receiving stream is impaired and if it has a TMDL established. It must also describe potential pollutants
in each outfalI. The map requirements are stated more explicitly. And, the site- plan must contain a list of
significant spills that have occurred in the past three years and also must certify that the outfalls have
been inspected to ensure that they do not contain non-stormwater discharges. Additional information is
provided in Part II Section A.
2. Additional requirements for the Stormwater Management Plan have been specified in Part II Section A.
More details regarding secondary containment are provided.
3. Additional requirements for the Stormwater Pollution Prevention Plan have been specified in Part II
Section A. The plan must also be updated annually to include a list of significant spills and to certify that
the outfalls do not contain non-stormwater discharges.
4. The facility must now implement a semi-annual Facility Inspection Program of the site's stormwater
management controls as specified in Part II Section A.
5. Information regarding the No Exposure Exclusion has been added to this draft permit. If industrial
materials and activities are not exposed to precipitation or runoff as described in 40 CFR $122.26(g), the
facility may qualify for a No Exposure Exclusion from NPDES stormwater discharge permit
requirements. Additional information is provided in Part I Section A.
6. In addition to submitting two signed copies of DMRs to Central Files, a separate signed Annual Summary
DMR copy must be submitted to the local DWQ Regional Office by March 1 of each year.
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.
If you have any questions or comments concerning this draft permit; contact me at (919)-807-6375 or
robert.patterson®ncdenr.gov
Sincerely,
Robert D. Patterson, PE
Environmental Engineer
Stormwater Permitting Unit
cc: Mr. Ken Jones, Environmental Services Group, 904 Garland St., Little Rock, AR 72201
Raleigh Regional Office, Mack Wiggins
Stormwater Permitting Unit
Attachments
2

0
•
•
NCS000046
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE STORMWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
If
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by th�e.North.Carolina Environmental
Management Commission, and the Federal Water P.oliutio ntrol Act, as amended,
Airgas Specialty Gases
is hereby authorized to_ :disch stormwater from a facility located at
;ASG Durham
630 United Drive
Durham, NC
Durham County
to receiving waters designated as a UT of Northeast Creek, a class C. NSW stream in the Cape
Fear River Basin, in accordance with the -discharge limitations, monitoring requirements, and
other conditions set forth in Parts I, II, I11, IV, V and VI hereof.
Note: Draft Permit Dates are Approximate
This permit shall become effective February 1, 2010.
This permit and the authorization to discharge shall expire at midnight on January 31, 2015.
Signed this 8"' day of January, 2010.
for Coleen H. Sullins Director
Division of Water Quality
By the Authority of the Environmental Management Commission

0 0 Permit No. NCS000046
TABLE OF CONTENTS
PART I INTRODUCTION
Section A: Individual Permit Coverage
Section B: Permitted Activities
Section C: Location Map
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
Section A: Stormwater Pollution Prevention Plan
\�
Section B: Analytical Monitoring Requiremts
Section C: Qualitative Monitoring Requirements
Section D: On -Site Vehicle'Maintenance,Monitoring Requirements
� F
ft �) �v'
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL
PERMITS -
Section A: Compliance and Liability
1. Compliance Schedule
2. Duty to. Comply
3. Duty to Mitigate ,
4. Civil and Criminal Liability
S. 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
3. Signatory Requirements
i

Permit No. NCS000046
4. Individual Permit Modification, Revocation and Reissuance, or
Termination
5. Permit Actions
Section C: Operation and Maintenance of Pollution Controls
I . Proper Operation and Maintenance
2. Need to Halt or Reduce Not a Defense
3, Bypassing of Stormwater Control Facilities
Section D: Monitoring and Records „
1. Representative Sampling
N3
2. Recording Results
3. Flow Measurements 5 `
4. Test Procedures
5. Representative Outfall
6. Records Retention
7. Inspects n and�Ent y
Section E: Reporting Requirements
1. Discharge
harge Monitoring Reports.
2. Submitting:Reports
3. Availa15ility of Reports
4. Non-Stormwater Discharges -
5. Planned Changes
6. Anticipated Noncompliance
7. .Spills
S. Bypass
9. Twenty-four Hour Reporting
10. Other Noncompliance
11'. Other Information
PART IV LIMITATIONS REOPENER
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS
PART VI DEFINITIONS
ii

0
Perni t No. NCS000046
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 stornwater associated with industrial activity. Such
discharges shall be controlled, limited and monitored as,specified in this permit.
If industrial materials and activities are not exposed to. precipitation or runoff as described in 40
CFR § 122.26(g), the facility may qualify for a No Exposure Exclusion from NPDES stormwater
discharge permit requirements. Any owner or operator wishing`to obtain a No Exposure
Certification must submit a No Exposure Certification'NOI fofm to the,Division; must receive
approval by the Division; must maintain no exposure conditions unless authorized to discharge
under a valid NPDES stormwater permit; and must reapply for the°No Exposure Exclusion once
every five (5) years. f%
n
SECTION B: PERMITTED ACTIVITIES r /
Until this permit expires or is modified or revoked; the permittee is authorized to discharge
stormwater to the surface waters of Norih Carolina or separate storm sewer system that has been
adequately treated and managed in accord nce with the terms and conditions of this individual
permit. All stormwater discharges shall bcln accordance with the conditions of this permit.
Any other point source dischasge_to surface waters of the state is prohibited unless it is an
allowable non-stormwater discharge or is covered by another permit, authorization, or approval.
The stormwater discharges allowed by this 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 I of 2

SECTION C: LOCATION MAP
Perini[ No. NCS000046
� � r ; �."�.a'.� pry\ ., '_ ; � �•CIIy � �,��, i:t�'�'� �� ,• �� ; �� � -
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.,�+,� ! r.. /� f f -. a' ✓ � t.:y r -; R '`Y f .�. � ', l irt�- r ti ,�,.: �,.
l .../ � 1 J `k:�. : i r '•'. :€ �iy ��J) 1 =1� �,� tI 4♦� rf' � {'�^ �ti�
�.sa F' � 'Y �`C. S i � �•�L• �t S " Llylf � 1� 1, n � �i �#f`.iJ d k 1
� i � rrr ,. :-F i ,�; . -• �� � i;� i r l.wxv..s�• '� � ' ^N} it y� �� f
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NCS000046
S
Airgas Specialty Gases
ASG Durham
Latitude: 350 56' 06" N
Longitude: 78" 51' 00" W
Ccunty: Durtam
Rec4uina Stream: UT of Northeast Creek
Stream Gass: C; NS-,:r
Sub -basin: 03-06-05 (Cape Fear River Basin)
Facility Location
Part I Page 2 of 2

Permit No. NCS000046
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR
PERMITTED DISCHARGES
SECTION A: STORMWATER POLLUTION PREVENTION PLAN
The Permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to as
the Plan- This Plan shall be considered public information in accordance with Part III, Standard
Conditions, Section E, Paragraph 3 of this individual permit. The Plan shall include, at a
minimum, the following items:
l . Site Plan. The site plan shall provide a description of the physical facility and the
n X. potential pollutant sources which may be expected to contribute to contamination of
stormwater discharges. The site plan shall contain the.following:
(a) A general location map (USGS quadrangle map or appropriately drafted
equivalent map), showing the facility'SAlocat on in relation to transportation routes
and surface waters, the name of the receivin" ater{s) to which the stormwater
outfall(s) discharges, or if the discharge is to a municipal separate storm sewer
system, the name of the municipality and the ultimate receiving waters, and
accurate latitude and longitude of the;point(s) of discharge. The general location
map (or alternatively the site -map) -shall identify whether each receiving water is
impaired (on the state's 303(dy`list of impaired waters) or is located in a
watershed for which-a"TIVIDL has been established, and what the parameter(s)
of concern are.- i j
(b) A narrative d'esc�iption 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.
(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
Dart II Page I of 10

0 Permit No. NCS000046
B, Paragraph 5. 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 stonnwater, including structural and
nonstructural measures. The stormwater management plan, at a minimum, shall
incorporate the following:
(a) Feasibility Study. A review'of the technical and economic feasibility of changing
the methods of operations and/or storage -practices to eliminate or reduce exposure
of materials and processes to stormwater' Wherever practical, the permittee shall '' r
prevent exposure of all storage areas, material' -handling operations, and
manufacturing or fueling operations. In areas.where elimination of exposure is
not practical, the stormwater management plan shall - document.the feasibility of
diverting the stormwater runoff away fr m areas of potential contamination.
(b) Secondary Containment Requirements and Records. Secondary containment is
required for: bulk storage of liquid materials; storage in any amount of Section
313 of Title III of the Superfund Amendments and Reauthorization Act (SARA)
water priority chemicals; and storage.inany amount of hazardous substances, in
order to prevent leaks and spills {from contaminating stormwater runoff. A table
or summary of all such tanks and stored materials and their associated secondary
containment areas,shall:bC,maintained. If the secondary containment devices are
connected to stormwater conveyance systems, the connection shall be controlled
by manually activated valves or other -similar devices (which shall be secured
closed with alocking:m/ echanism), 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 any material. Records documenting the individual making the
observation, the description of the accumulated stormwater, and the date -and time
of the release shall be kept for a period of five 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.
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
Part 11 Page 2 of 10

0 0 Permit No. NCS000046
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.
,l
4. Preventative Maintenance and Good Housekeeping Program. A preventative
maintenance and good housekeeping program shall be developed. The program shall list
all stormwater control systems, stortwater discharge outfalls, all on -site and adjacent
surface waters and wetlands, industrial activity areas (including material storage areas,
material handling areas, disposal areas, process areas, loading and unloading areas, and
haul roads), all drainage features and structures!and�exi`sting structural BMPs. The
program shall establish schedules of inspectiors, ma tenanceand housekeeping
activities of stormwater control systems, as well as facility equipment, facility areas, and
facility systems that present a potential for stormwater exposure or stormwater pollution.
Inspection of material handling areas and regular cleaning schedules of these areas shall
be incorporated into the program: Timely compliance with the established schedules for
inspections, maintenance, and housekeeping shailbe recorded in writing and maintained
in the SPPP. '
S. Employee Training. Training programs, shall be developed and training provided at a
minimum on an annual basis -for, facility personnel with responsibilities for. spill response
and cleanup, preventative maintenance activities, and for any of the facility's operations
that have the potential•to contatiiinate stormwater runoff. Facility personnel (or team) -
responsibie 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 written re -certification that the Stormwater outfalls have been
evaluated for the presence of non-stormwater discharges. Each annual update shall
include a documented re-evaluation of the 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
Part 11 Page 3 of 10

•
0 Permit No. NCS000046
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 Housekeeping Program at a minimum on
a semi-annual schedule, once during the first half of the year (January to June), and once
during the second half (July to December), with at least 60 days separating inspection
dates (unless performed more frequently than semi-annually). These facility inspections
are different from, and in addition to, the stormwater discharge characteristic monitoring
required in Fart II B and C of this permit.
Ate/
9. Implementation. The permittee shall implement the Rla&i mplementation of the Plan
shall include documentation of all monitoring,,, measurementsjnspections, maintenance +
activities, and training provided to ernpioyeesk eluding tlie'log of the sampling'data-and
of actions taken to implement BMPs associated wit"h,the industrial activities, including
vehicle maintenance activities. Such documentatiodshall be kept on -site for a period of
five years and made available to the Direc o orthe'Director's authorized representative
immediately upon request., ,
' r7
Part II Page 4 of 10

0 Permit No. NCS000046
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 0.1 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 discharce begins within 10 hours.
Table 1. Analytical Monitoring Requirements^
Discharge
Measurement Frequency)
Sample
Sample
Characteristics
Units
Type2
Location3
Total Suspended Solids, TSS
m L
semi-annual
Grab
SDO
Chemical Oxygen Demand,-�
~ •.s,/
Grab
SDO
COD
mg/L
ietnt ,annual
, i-
Nitrogen, Total
,m
{ semi-annual
Grab
SDO
Phosphorus, Total
trig 1,
"semi-annual
Grab
SDO
H
standard.
semi-annual
Grab
SDO
Total Rainfal14
inches-,,Isemi-annual
Rain Gauge
--
Footnotes:` g
I Measurement Frequency: Twice per year during a representative storm event.
2 Grab samples shall be collected within the first 30 minutes of discharge.
3 Sample Location: Samples shall be collected at each stor nwater discharge outfall (SDO) unless representative outfall
status has been granted.
4 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.
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 Period 1 and
Period 2 sample dates unless monthly monitoring has been instituted under a Tier Two
response.
Part II Page 5 of 10

•
Permit No. NCS000046
Table 2. Monitoring Schedule
Monitoring1.
period,'�
Sample'Number
'Start
End ,
Year 1 'Period 1
1
February 1; 2010
July 31, 2010
Year 1 — Period 2
2
August 1, 2010,
January 31, 2011
Year 2 — Period 1
3
February 1, 2011
July 31, 2011
Year 2 — Period 2
4
.. August 1, 2011
January 31, 2012
Year 3 — Period 1
5
February 1, 2012
July 31, 2012
Year 3 — Period 2
6
August 1, 2012
January 31,-2013
Year 4 — Period- l
7
February 1, 2013
July 31, 2013'
Year 4 — Period 2
8
August 1, 2013
January 31, 2014
Year 5 — Period 1
9
February i , 2014
July 31, 2014
Year 5 — Period 2
10
August 1; 20�14
January 31, 2015 '
Footnotes:
I Maintain semi-annual monitoring during permit renev
Permit, the permittee has submitted an application for
the perminee will be considered for renewed coveragt
ft.tlie'expiration of the Individual
coverage before the submittal deadline,
icant must continue semi -annual -
monitoring until the renewed Certificate of Coverage;is,►ssued�/
2 If no discharge occurs during the sampling period, the It'permittee must submit a monitoring report indicating
"No Flow" within 30 days of the end of the six-month sampling period.
• The permittee shallreport the analyfica
monitoring period. The permittee-shall
Table 3. The benchmark values in Tal
- the permittee's Stormwater Pollution P
require, the permittee to increase moni
and/or install stormwater Best.Managet
descriptions of Tier One and Tier Two.
results from the first sample with valid results within the
compare monitoring results to the benchmark values in
HIV are not permit limits but should be used as guidelines for
evention Plan (SPPP). Exceedences of benchmark values
ring, increase management actions, increase record keeping,
lent Practices (BMPs) in.a tiered program. See below the;;_
Table 3. Benchmark Values for Analvtical Monitorine
Discharge Characteristics
Units.
Benchmark
Total Suspended Solids, TSS
mg/L,
100
Chemical Oxygen Demand,
COD
mg/L
120
Nitrogen, Total
mg/L
30
Phosphorus, Total
mg/L
2
PH
standard
6-9
Part II Page 6 of 10

•
0 Permit No. NCS000046
Tier One
If: The first valid sampling results are above a benchmark value, or outside of the benchmark range, for any
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 parameters of concern, or to bring concentrations
within the benchmark range.
4. Implement the selected actions within two months of the inspection.
5. Record each instance of a Tier One response in the Stormw`at6r,Pollution Prevention Plan. Include
the date and value of the benchmark exceedence, the inspection date, -'the personnel conducting the
inspection, the selected actions, and the date the selected.actions were implemented.
I \ '1�
Tier Two
If: During the term of this permit, the first valid sampling results from two consecutive monitoring periods
are above the benchmark values, or outside of the bene mark range, for any specific parameter at a
specific discharge outfall;
Then: The permittee shall:
1. Repeat all the required actions outlined,above in Tier One.
2. Immediately institute monthly monitoriiig for all parameters 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.
3. If no discharge occurs during the sampling period, the permittee is required to submit a monthly
monitoring report indicating `No Flow" to comply with reporting requirements.
4. Maintain a record of the Tier Two response in the Storrnwater Pollution Prevention Plan.
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 Regional Office Supervisor in writing within
30 days of receipt of the fourth analytical results. DWQ may but is not limited to:
• require that the permittee revise, increase, or decrease the monitoring frequency for the remainder
of the permit;
• require the permittee to install structural stormwater controls;
require the permittee to implement other stormwater control measures; or
• require that the permittee implement site modifications to qualify for the No Exposure Exclusion.
Part 11 Page 7 of 10

.0 0 Permit No. NCS000046
0
This site discharges to impaired waters experiencing problems with turbidity and low dissolved
oxygen. -;;There is currently a TMDL for fecal coliform in Northeast Creek. If another Total
Maximum Daily Load (TMDL) is approved for this segment of Northeast Creek, the permittee
may be required. to monitor for the pollutant(s) of concern in the future and submit results to the
Division of Water Quality. The Division will consider the monitoring results in determining
whether additional BMPs are needed to control the pollutant(s) of concern to the maximum .
extent practicable.
If additional BMPs are needed to achieve the required level of control, the pen-nittee,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
Qualitative monitoring requires a visual inspection of
representative outfall status and shall be performed asp
monitoring event. [If analytical monitoring is notr�i_
annual qualitative monitoring.] Qualitative motutonri;
effectiveness of the Stormwater Pollution Prevention I
stormwater pollution. 1-7
stormwateroutfall regardless of
ified in Table 4, during the analytical
the permittee still must conduct semi--;,�
.or the purpose of evaluating the
(SPPP) and. assessing new sources of
In the event an atypical condition is noted,at a stormwater discharge outfall, the permittee shall
document the suspected cause ofthe-condition and any actions taken in response to•the
/� 1 ; �.
discovery. This documentationtwill-be1maintained with the SPPP.
Table 4. - Oualitative Monitorhp- Reauirements
'Discharge_ Characteristics
Frequencyl-
:Monitoring
Location2. .
Color
semi-annual
SDO
Odor
semi-annual
SDO
Clarity
semi-annual
SDO
Floating Solids
semi-annual
SDO
Suspended Solids
semi-annual
SDO .
Poam
semi-annual
SDO
Oil Sheen
semi-annual
SDO
Erosion or d osition at the outfall
semi-annual
SDO
Other obvious indicators
of stormwater pollution
semi-annual
SDO
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 permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the
Part II Page 8 of 10

0
Permit No. NCS000046
permittee 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 Monitoring Location: Qualitative monitoring shall be performed at each stormwater discharge outfall (SDO)
regardless of representative outfall status.
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.
Table 5. Analytical Monitoring Requirements fo On Sit Vehicle Maintenance
Discharge Characteristics
Units
Measurement
Sample
Sample
Fre uenc 1
Type2
Location3
pH
standard!
'•semi-annual
Grab
SDO
TPH
mg/1,, ;;'
_semi-annual
Grab
SDO
[EPA Method 1664 (SGT-HEM)]
`. {
Total Suspended Solids
m, l , �e /'
semi-annual
Grab
SDO
Total Rainfall4f
inches/
semi-annual
Rain gauge
-
New Motor Oil Usage
gallons/month
semi-annual
Estimate
-
Footnotes:
1 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 permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the
permittee 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 from the pond.
3 Sample Location: Samples shall be collected at each stormwater discharge outfall (SDO) that discharges
stormwater runoff from area(s) where vehicle maintenance activities occur.
4 For each sampled representative storm event the total precipitation must be recorded. An on -site or local rain
gauge reading must be recorded.
Part 11 Page 9 of 10

Permit No. NCS000046
Monitoring results shall be compared to the benchmark values in Table 6. The benchmark
values in Table 6 are not permit Iimits but should be used as guidelines for the permittee's
Stormwater Pollution Prevention Plan (SPPP). Exceedences of benchmark values require 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 Analytical Monitoring
.. Discharge Characteristics
Units - _
-. Benchmark.
pH
standard
6-9
TPH
mg/L
-
1'S
[EPA Method 1664 (SGT-HEM)]
A
Total Suspended Solids
mg/L
f� 00—
•Y�r
Part II Page 10 of 10

0
Permit No. NCS000046
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS
SECTION A: COMPLIANCE AND LIABILITY
1. Compliance Schedule
The permittee shall comply with Limitations and Controls specified for stormwater discharges in
accordance with the following schedule:
Existing Facilities already operating but applying for permit coverage for the first time: The Stormwater
Pollution Prevention Plan shall be developed and implemented within 12 months of the effective date of the
initial permit and updated thereafter on an annual basis. Secondary containment, as specified in Part I1,
Section A, Paragraph 2(b) of this permit, shall be accomplished. within 12 months of the effective date of
the initial permit issuance.
New Facilities applying for coverage for the first time and exist f g facilities previously permitted and
applying for renewal under this permit: The Stormwater Pollution Prevention Plan shall be developed and
implemented prior to the beginning of discharges from the operation of the industrial activity and be
updated thereafter on an annual basis. Secondary containment, as specified in Part I1, Section A, Paragraph
2(b) of this permit shall be accomplished prior to the beginning of discharges from the operation of the
industrial activity.
2. Duty to Comply
The permittee must comply with. all'c.onditions of this individual permit. Any permit noncompliance
constitutes a violation of the Clean Water Act and is grounds for enforcement action; for permit
termination, revocation and reissuance, `o{r6modification; or denial of a permit upon renewal application.
a. The permittee shall catxiply` 7ith standards or prohibitions established under section 307(a) of the
Clean Water Act 0 toxic pollutants within the time provided in the regulations that establish these
standards or prohiltions, 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(4).)
C. 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].
d. Any person may be assessed an administrative penalty by the Director for violating section 301,
302, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any
of such sections in a permit issued under section 402 of the Act. Administrative penalties for Class
I violations are not to exceed $10,000 per violation, with the maximum amount of any Class I
penalty assessed not to exceed $25,000. Penalties for Class II violations are not to exceed
Part III Page 1 of 8

•
• Permit No.-NCS000046
$10,000 per day for each day during which the violation continues, with the maximum amount of
any Class II 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.
4. • 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 penmittee is responsible for
consequential damages, such as fish kills, even though the responsibility for effective compliance may be
temporarily suspended.' _
5. Oil and Hazardous Substance Liability
Nothing in this individual permit shall be construed to•preclude the institution of any legal action or relieve
the permittee from any responsibilities, liabilities,," r penaltiesto which the permittee is or may be subject to
under NCGS 143-215.75 et seq. or Section 311 of the:Feder�al Act, 33 USC 1321.
6. Property Rigs
.. LA
The issuance of this individual permit does not convey any property rights in either real or personal
-. `s
property, or any exclusive privileges, nor doesrt authorize,any injury to private property or any invasion of
personal rights, nor any infringement of Federal, State or local- laws or regulations.
7. Severability
The provisions of this individual permit are severable, and if any provision of this individual permit, or the
application of any provision of this individual permit to any circumstances, is held invalid, the application
of such provision to other circumstances, and'the remainder of this individual permit, shall not be affected
thereby.
8. Duty to Provide Information
The permittee shall furnish to the Director, within a reasonable time, any information which the Director
may request to determine whether cause exists for modifying, revoking and reissuing; or terminating the.
permit issued pursuant to this individual permit or to determine compliance with this individual permit. The
permittee shall also furnish to the Director upon request, copies of records required to be kept by this
individual permit.
9. Penalties for Tampering
The Clean Water Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate,
any monitoring device or method required to be maintained under this individual permit shall, upon
conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more
than 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

0
Permit No. NCS000046
10. Penalties for Falsification of Reports
The Clean Water Act provides that any person who knowingly makes any false statement, representation, or
certification in any record or other document submitted or required to be maintained under this individual
permit, including monitoring reports or reports of compliance or noncompliance shall, upon conviction, be
punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than two years
per violation, or by both.
SECTION B: GENERAL. CONDITIONS
1. Individual Permit Expiration
f.
The permittee is not authorized to discharge after the expiration date;/In order to receive automatic
authorization to discharge beyond the expiration date, the permitteeishall submit forms and fees as are
required by the agency authorized to issue permits no late'rAhan l 80`days prior to the expiration date. Any
permittee that has not requested renewal at least 180 days prior to expiration, or any permittee that does not
have a permit after the expiration and has not requested renewal at least 180 days prior to expiration, will be
subjected to enforcement procedures as provided in NNCCGS § 1143-22153.E and 33 USC 1251 et. seq.
2. Transfers
This permit is not transferable to any person except after.notice to and approval by the Director. The
Director may require modification or revocaiion-and reissuance of the permit to change the name and
incorporate such other requirements as maybe necessary under the Clean Water Act. The Permittee is
required to notify the Division in writing in the event the permitted facility is sold or closed.
3. Signatory Requirements r �/
r
r
All applications, reports, or+information submitted to the Director shall be signed and certified.
a. All applications to be'covered under this individual permit shall be signed as follows:
(1) 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 9

Permit No. NCS000046
responsibility, or an individual or position having overall responsibility for environmental
matters for the company. (A duly authorized representative may thus be either a named
individual or any individual occupying a named position.); and
(3) The written'authorization is submitted to the Director.
C. Any person signing a document under paragraphs a. or b. of this section shall make the following
certification:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information,, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment ,ff bnkhoowiinng' violations!'
4. Individual Permit Modification. Revocation and Reiss iian e;''or Terniiiiation -
The issuance of this individual permit does not prohibit Director from reopening and modifying the
individual permit, revoking and reissuing the individual permit;`or terminating the individual permit as
allowed by the laws, rules, and regulations contained in Title Code of Federal Regulations, Parts 122
y
and 123; Title 15A of the North Carolina Administrative ode, Subchapter 2H .0100; and North Carolina
General Statute 143-215.1 et al.
5. Permit Actions
_. The permit may be me
changes or anticipated
� '` /
SECTION C: OPERATION AND=MAIN
I . Proper Operation and Maintenance
2.
-issued, or terminated for cause. The notification of planned
not stay any individual permit condition.
ANCE 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 operation and maintenance also includes adequate
laboratory controls and appropriate quality assurance procedures. This provision requires the operation of
back-up or auxiliary facilities or similar systems which are installed by a permittee only when the operation
is necessary to achieve compliance with the conditions of this individual permit.
Need to Halt or Reduce Not a Defense
It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the condition of this individual permit.
3. Bypassing of Stormwater Control Facilities
Bypass is prohibited and the Director may take enforcement action against a permittee for bypass unless:
a: • Bypass was unavoidable to prevent loss of life, personal injury or severe property damage; and
Part III Page 4 of 8

s s
Permit No. NCS000046
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
1. Representative Sampling
Samples collected and measurements taken, as required herein , s all characteristic of the volume and
nature of the permitted discharge. Analytical sampling�shall be performed during a representative storm
event. Samples shall be taken ona day and time that is, haracteristic of the discharge. All samples shall be
taken before the discharge joins or is diluted by any other waste stream, body of water, or substance.
Monitoring points as specified in this permit shall -not be changed without notification to and approval of
the Director. ,yfi
2. Recording Results
For each measurement, sampleJnspection or maintenance activity performed or collected pursuant to the
requirements of this individual permit;'the permittee shall record the following information:
a. The date, exact place, and tim a of sampling, measurements, inspection or maintenance ctivity;
/ A/r
b. The individual(s)'who performed the sampling, measurements, inspection or maintenance activity;
C. The date(s) analyses were performed;
d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
€. The results of such analyses.
Flow Measurements
Where required, appropriate flow measurement devices and methods consistent with accepted scientific
practices shall be selected and used to ensure the accuracy and reliability of measurements of the volume of
monitored discharges.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to the EMC regulations published pursuant to
NCGS 143-215.63 et. seq, the Water and Air Quality Reporting Acts, and to regulations published pursuant
to Section 304(g), 33 USC 1314, of the Federal Water Pollution Control Act, as Amended, and Regulation
40.CFR 136.
Part III Page 5 of 8

•
Permit No. NCS000046
To meet the intent of the monitoring required by this individual permit, all test procedures must produce
minimum detection and reporting levels and all data generated must be reported down to the minimum
detection or lower reporting level of the procedure.
5. Representative 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 identicaI'and the permittee is granted
representative outfall status, then sampling requirements may be performed at a reduced number of outfalls.
6. Records Retention
Visual monitoring shall be documented and records maintained at the -facility along with the.Stormwater
Pollution Prevention Plan. Copies of analytical monitoring results, shall also be maintained on -site. The _
permittee shall retain records of all monitoring information, including all calibration and maintenance
records and all original strip chart recordings for continuous rriomtoring-instrumentation, and copies of all
reports required by this individual permit for a period of at,least 5 yeafs*om the date of the sample,
measurement, report or application. - This period may be?eXtended by request of the Director at any time.
U � '
7. Inspection and Entry
The permittee shall allow the Director, or an authonzed represeniative (including an authorized contractor
f
acting as a representative of the Director), or inthe,case of a facility which discharges through a municipal
separate storm sewer system, an authorized �epresentatiye of a municipal operator or the separate storm
sewer system receiving the discharge, pon tZpresentation of credentials and other documents as may be
required by law, to;
'a. Enter upon the permittee's pre'thises where a regulated facility. or- activity is located or conducted,
or where records must be kept under the conditions of this individual permit;
b. Have access to and' -copy, at reasonable times, any records that must be kept under the conditions of
this individual permit;
C. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment),
practices, or operations regulated or required under this individual permit; and
d. _ Sample or monitor at reasonable times, for the purposes of assuring individual permit compliance
or as otherwise authorized by the Clean Water Act, any substances or parameters at any location.
SECTION E: REPORTING REQUIREMENTS -
1. Discharge Monitoring Reports
Samples analyzed in accordance with the terms of this permit shall be submitted to the Division on
Discharge Monitoring Report forms provided by the Director. Submittals shall be delivered to the Division
no later than 30 days from the date the facility receives the sampling results from the laboratory.
The permittee shall submit an Annual Summary Data Monitoring Report to the appropriate DWQ Regional
Office in February of each year. The submittal shall be on forms supplied by the Division.
Part III Page 6 of 8

Permit No. NCS000046
When no discharge has occurred from the facility during the report period, the permittee is required to
submit a discharge monitoring report, within 30 days of the end of the six-month sampling period, giving all
required information and indicating "NO FLOW ' as per NCAC T15A 0211.0506.
The permittee shall record the required qualitative monitoring observations on the SDO Qualitative
Monitoring Report form provided by the Division, and shall retain the completed forms on site. Visual
monitoring results should not be submitted to the Division, except upon DWQ-s specific requirement to do
so.
Submitting Reports
Two signed copies of Discharge Monitoring Reports (DMRs) shall be submitted to:
Central Files
Division of Water Quality
1617 Mail Service Center
Raleigh, North Caroiina'27699-161,7
In addition, a separate signed Annual Summary DMR copy shall be submitted to the local DWQ Regional
Office (RO) by March 1 of each year.
Addresses for each RO and the counties covere y each O can be found here:
http://w,tvw.enr.state.ne.us/htmVrerionaloices.htm]. Jhe permittee shall retain the completed originals
on site. Visual monitoring results should not be submitted to the Regional Offices or Central Files unless
specifically requested by DWQ. `• %' .-
ti
Availability of Reports
Except for data determined'to be confidential under NCGS 143-215.3(a)(2) or Section 308 of the Federal
Act, 33 USC 1318, all pots prepared rein accordance with the -terms shall be available for public inspection
at the offices of the Division of -Water Quality. As required by the Act, analytical data shall not be
considered confidential. Kn'owmgly making any false statement on any such report may result in the
imposition of criminal penalties as provided for in NCGS 143-215.613 or in Section 309 of the Federal Act.
4, Non-Stormwater Discharges
If the storm event monitored in accordance with.this Individual Permit coincides with a non-stormwater
discharge, the permittee shall separately monitor all parameters as required under the non-stormwater
discharge permit and provide this information with the stormwater discharge monitoring report.
5. Planned Changes
The permittee shall give notice to the Director as soon as possible of any planned changes at the permitted
facility which could significantly alter the nature or quantity of pollutants discharged. 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).
6. Anticipated Noncompliance
The permittee shall give notice to the Director as soon as possible of any planned changes at the permitted
facility which may result in noncompliance with the Individual Permit requirements.
Part III Page 7 of 8

Permit No. NCS000046
7. Spills
The permittee shall report to the local DWQ Regional Office, within 24 hours, -all significant spills as
defined in Part VI of this permit. Additionally, the permittee shall report spills including: any oil spill of 25
gallons or more, any spill regardless of amount that causes a sheen -on surface waters, any oil spill
regardless of amount occurring within 100 feet of surface waters, and any oil spill -less than 25 gallons that
cannot be cleaned up within 24 hours.
8. 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 art evaluation of
r' 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.
9. 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 written submission shall also be provided
within 5 days of the time the permittee becomes away oJf. t&e-Zircumstances.
The written submission shall contain a de �cnptron of,the noncompliance, and its causes; the period of
noncompliance, including exact dates.And time4iind'if the noncompliance has not been corrected, the
N 'w
anticipated time compliance is expected to continue; and steps taken or planned to reduce, eliminate, and
prevent reoccurrence of the none mpliancee
The Director may waive th6l�vitten report on a case -by -case basis if the oral report has been received
within 24 hours. f
10. Other Noncompliance
The permittee shall report all instances of noncompliance not reported under 24 hour reporting at the time
monitoring reports are submitted.
H. Other Information
Where the permittee becomes aware that it failed to submit any relevant facts in a Notice of Intent to be
covered under this Individual Permit or in any report to the Director, it shall promptly submit such facts or
information.
Part III Page 8 of 8

NCS000046
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
3
b. Controls any pollutant not limited in the individual permit. f
The individual permit as modified or reissued under this paragraph~.shall also contain,any other requirements in the
Act then applicable. I1�
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS\
The permittee must pay the administering and compliance monitoring fee within 30 (thirty) days after being billed by
the Division. Failure to pay the fee in.timely mariner in'acc_ordance with 15A NCAC 2H .0105(b)(4) may cause this
Division to initiate action to revoke the.Individual-\Permit.
PARTYI DEFINITIONS
1. Act -
See Clean Water Act.
2. Allowable Non-Stormwater Discharges
This permit regulates stormwater discharges. Non-stormwater discharges which shall be allowed in the
stormwater conveyance system are:
(a) All other discharges that are authorized by a non-stormwater NPDES permit.
(b) Uncontaminated groundwater, foundation drains, air -conditioner condensate without added
chemicals, springs, discharges of uncontaminated potable water, waterline and fire hydrant
fleshings, water from footing drains, flows from riparian habitats and wetlands-
(c) Discharges resulting from fire -fighting or fire -fighting training.
3. 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. More information on BMPs can be found at:
http://cfpub.epa.gov/npdes/storinwater/menuofbmps/index.cfm.
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.
Bulk Storage of Liquid Products
Liquid raw materials, manufactured products, waste materials or by-products with a single above ground
storage container having a capacity of greater than 660 gallons or with multiple above ground storage
containers located in close proximity to each other having a total combined storage capacity of greater than
11320 gallons.
Parts IV, V and VI Page 1 of

Permit No. NCS000046
6. Certificate of Coverage
The Certificate of Coverage (COC) is the cover sheet which accompanies the Individual Permit upon
issuance and lists the facility name, location, receiving stream, river basin, effective date of coverage under
the permit and is signed by the Director.
7. Clean Water Act
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC
1251, et. seq.
8. Division or DWO
The Division of Water Quality, Depaitment'of Environment and -Natural Resources.
9. Director
The Director of the Division of Water Quality, the `permit issuing uiliority.
to. EMC ZI
The North Carolina Environmental Management Commission: "-
11. Grab Sample
An individual sample collected instantaneously. Grab samples that will be analyzed (quantitatively or
qualitatively) must be taken within the f -1 , nuriF . - of discharge.
12. Hazardous Substance``��
Any substance designated under.40:CFR P in 'l6 pursuant to Section 311 of the Clean Water Act.
13. Landfill `✓
A disposal facility or part(/ia disposal facility where waste is placed in or on land and which is not a land
treatment facility, a surfacer ment, an injection 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,
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)
16. Notice of Intent
The state application form which, when submitted to the Division, officially indicates the facility's notice of
intent to seek coverage under an Individual Permit.
17. Permittee
The owner or operator issued a certificate of coverage pursuant to this Individual Permit.
Part VI Page 2 of Pages

Permit No. NCS000046
18. Point Source Discharge of Stormwater
Any discernible, confined and discrete conveyance including, but not specifically limited to, any pipe, ditch,
channel, tunnel, conduit, well, or discrete fissure from which stormwater is or may be discharged to waters
of the state.
19. Representative Storm Event
A storm event that measures greater than 0.1 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 begins within 10 hours-
20. Representative Outfall Status
When it is established that the discharge of stormwater runoff from a single outfall is representative of the
discharges at multiple outfalls, the DWQ may grant representative outfall status. Representative outfall
status allows the permittee to perform analytical monitoring at a'ieduced number of outfalls.
21. Secondary Containmentf�
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)
v
\>
22. Section 313 Water Priority Chemical
A chemical or chemical category which: !�
a. Is listed in 40 CFR 372.65 pursuant io Section 313 of Title III of the Superfund Amendments and
Reauthorization Act (SARA) of 1986, alsojitled 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. Meets at least one of the following criteria:
(1) Is listedinappendix D T of 40 CFR part 122.on able II (organic priority pollutants), Table
III (certain metals,tcyanides; and phenols) or Table IV (certain toxic pollutants and
hazardous `substances); -'
(2) is liste&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.
23. Severe Property Damage
Means substantial physical damage to property, damage to the control facilities which causes them to
become inoperable, or substantial and permanent loss of natural resources which can reasonably be
expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused
by delays in production.
24. Siggificant 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.
25. 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 CPR 11 T21) or section 102 of
CERCLA (Ref: 40 CFR 302.4).
Part VI Page 3 of 4 Pages

Permit No. NCS000046
26. Stormwater Dischar a Outfall SDO
The point of departure of stormwater from a discernible, confined, or discrete conveyance, including but not
limited to, storm sewer pipes, drainage ditches, channels, spillways, or channelized collection areas, from
which stormwater flows directly or.indirectly into waters of the State of North Carolina-.
27. Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following rainfall or as a
result of snowmelt. -
28. Stormwater Associated with Industrial Activi
The discharge from any point source which is used for collecting and conveying stormwater and which is''
directly related to manufacturing, processing or raw material storage areas at an industrial site. Facilities
considered to be engaged in "industrial activities" include those activities defined in 40 CFR 122.26(b)(14).
The term does not include discharges from facilities or activities excluded from the NPDES program. `
29. Stormwater Pollution Prevention Plan.
A comprehensive site -specific plan which details measures -.and practices�-to reduce stormwater pollution and
is based on an evaluation of the pollution potential of the -sit .
30. Total Maximum Daily Load (TMDL)
TMDLs are written plans for attaining and maintaining waterquality standards, in all seasons, for a 'specific
water body and pollutant. (A list of approved'TMrDLs�for the state of North Carolina can be found at
http:/lh2o.enr.state.nc.us/tmdll) �✓` - s
µ
31. Toxic Pollutant
C :ti
Any pollutant listed as toxic under.Sec07(a)(1) of the Clean Water Act.
32. Vehicle Maintenance Activity —
Vehicle rehabilitation, mech�anica�l r�epairs, painting, fueling, lubrication, vehicle cleaning operations, or
airport deicing operations. s r
33. 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.
34. 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 4 of 4 Pages

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
(This form is best filled out on computer, rather than hard copy. Then unprotect to
highlight in light blue as needed to make your comments more visible in the rural printing.)
[But DON'T protect document again, or Word wipes out all you have entered.]
Date: 11/03/0 County: Durha°-
To: NPDES Discharge Permitting Unit Permitee: Aiiri?,as�aliyG�
Attn. NPDES Reviewer: Robert=PaApplication/ Permit No. NCS00
Staff Report Prepared By: hfiiM '
Project Name:
SOC Priority Project? (Y/N) _ If Yes, SOC No.
A. GENERAL INFORMATION
1. This application is (check all that apply): ❑ New ® Renewal
❑ Modification
2. Was a site visit conducted in order to prepare this report? ❑ Yes or ❑ No.
a. Date of site visit: 09/15/09
b. Person contacted and telephone number: Charlie Winston, 919-544-3773
�j
c. Site visit conducted by: Mack Witggins r r+ W
d. Inspection Report Attached: ❑ Yes or ❑ No.
3. 'Keeping BIMS Accurate: Is the following BIMS information (a. through e. below) correct?
❑ Yes or ❑ No. If No, please either indicate that it is correct on the current application or the
existing permit or provide the details. If none can be supplied, please explain:
Discharge Point: (Fill this section only if BIMS or Application Info is incorrect or missing)
(If there is more than one discharge pipe, put the others on the last page of this form.)
a. Location OK on Existing Permit ®, OR, if not, is
OK on Application ❑, or if neither is right, provide Location:
b. Driving Directions OK on Existing Permit N, OR, if not, is
OK on Application ❑, or provide Driving Directions (please be accurate):
c. USGS Quadrangle Map name and number OK on Existing Permit ®, OR, if not, is
'OK on Application ❑, or provide USGS Quadrangle Map name and number:
d. Latitude/Longitude OK on Existing Permit ❑, (check at hn://www.tot)ozone.com These are
often inaccurate) or is OK on Application ❑, or provide Latitude: 35.936917 Longitude:
78-902886
e. Receiving Stream OK on Existing Permit ❑, OR, if not, is
OK on Application ❑, or provide Receiving Stream or affected waters: Unnamed tributary to
Northeast Creek
a. Stream Classification: C-NSW
b. River Basin and Sub basin No.: 030605
c. Describe receiving stream features and downstream uses:

ti
d
NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
F_or NEW FACILITIES Proceed to Section C, Evaluation and Recommendations
(For renewals or mod cations continue to section B)
B. DESCRIPTION OF FACILITIES AND WASTES) (renewals and modifications only)
1. Describe the existing treatment facility:
2. Are there appropriately certified ORCs for the facilities? ❑ Yes or ❑ No.
Operator in Charge: Certificate #
Back- Operator in Charge: Certificate #
(Available in BIMS or Certification Website)
3. Does the facility have operational or compliance problems? Please comment:
Summarize your BIMS review of monitoring data (Notice(s) of violation within the last permit cycle;
Current enforcement action(s)):
Are they currently under SOC, ❑ Currently under JOC, ❑ Currently under moratorium ❑? Have
all compliance dates/conditions in the existing permit, SOC, JOC, etc. been complied with? ❑ Yes
or ❑ No. If no, please explain:
4. ResiduaIs Treatment: PSRP ❑ (Process to Significantly Reduce Pathogens, Class B) or
PFRP ❑ (Process to Further Reduce Pathogens, Class A)?
Are they liquid or dewatered to a cake?
Land Applied? Yes ❑ No ❑ If so, list Non -Discharge Permit No.
Contractor Used:
Landfilled? Yes ❑ No❑ If yes, where?
Other?
Adequate Digester Capacity? Yes [] No ❑ Sludge Storage Capacity? Yes ❑ No ❑
Please comment on current operational practices:
5. Are there any issues related to compliance/enforcement that should be resolved before issuing this
permit? ❑ Yes or ❑ No. If yes, please explain:
C. EVALUATIONAND RECOMMENDATIONS
1. Alternative Analysis Evaluation: has the facility evaluated the non -discharge options available? Give
regional perspective for each option evaluated:
Spray Irrigation:
Connect to Regional Sewer System:
Subsurface:
Other Disposal Options:
FORM: NPDES-RRO 06/03, 9/03, 1/07 2

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
2. Provide any additional narrative regarding your review of the application: This facility has gone
through a business change. Airgas Specialty Gases has been in control since April 1, 2009. The
facility has three outfalls. At the time of the inspection Airgas Specialty gases had not implement its
stormwater program as required by their permit. As per the plant manager implementation of the
program will begin immediately. RRO recommend that their individual Stormwater permit be issued.
3. List any items that you would like NPDES Unit to obtain through an additional information
request. Make sure that you provide a reason for each item:
Recommended Additional Information Reason
4. List specific Permit requirements that you recommend to be removed from the permit when
issued. Make sure that you provide a reason for each condition:
Recommended Removal Reason
5. List specific special requirements or compliance schedules that you recommend to be included in
the permit when issued. Make sure that you provide a reason for each special condition:
Recommended Addition Reason
6. Recommendation: ❑ Hold, pending receipt and review of additional information by regional office;
❑ Hold, pending review and approval of required additional information by NPDES permitting
office; ® Issue; ❑ Deny. If deny, please state reasons:
Reminder: attach inspection report if Yes was checked for 2 d.
7. Signature of report preparer:
Signature of W9Sjreegional supervisor:" U y
Date: [
FORM: NPDES-RRO 06/03, 9/03, 1/07 3

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
P. ADDITIONAL REGIONAL STAFF REVIEW ITEMS
1f next page is not used, PLEASE set printer for pages 1 through 3 to avoid wasting paper.
Use this page for facilities with more than one Discharge Pipe
Discharge Point: (Fill this section only if BIMS or Application Info is incorrect or missing►)
a. Location OK on Application ❑,
OK on Existing Permit ❑, or provide Location:
b. Driving Directions OK on Application ❑,
OK on Existing Permit ❑, or provide Driving Directions (please be accurate):
c. USGS Quadrangle Map name and number OK on Application ❑,
OK on Existing Permit ❑, or provide USGS Quadrangle Map name and number:
d. Latitude/Longitude OK on Application ❑, (check at http://topozone.com These are often
inaccurate) OK on Existing Permit ❑, or provide Latitude: Longitude:
e. Receiving Stream OK on Application ❑,
OK on Existing Permit ❑, or provide Receiving Stream or affected waters:
a. Stream Classification:
b. River Basin and Sub basin No.:
c. Describe receiving stream features and downstream uses:
Discharge Point: (FiII this section onlv if BIMS or Annlication Info is incorrect or missin
a. Location OK on Application ❑,
OK on Existing Permit ❑, or provide Location:
b. Driving Directions OK on Application ❑,
OK on Existing Permit ❑, or provide Driving Directions (please be accurate):
c. USGS Quadrangle Map name and number OK on Application ❑,
OK on Existing Permit ❑, or provide USGS Quadrangle Map name and number:
d. Latitude/Longitude OK on Application ❑, (check at http-.Htopozone.com These are often
inaccurate) OK on Existing Permit ❑, or provide Latitude: Longitude:
e. Receiving Stream OK on Application ❑,
OK on Existing Permit ❑, or provide Receiving Stream or affected waters:
a. Stream Classification:
b. River Basin and Sub basin No.:
c. Describe receiving stream features and downstream uses:
FORM: NPDES-PRO 06103, 9/03, 1/07 4

NCS000046
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
TO DISCHARGE STORMWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute l43-215.1, other lawful
standards and regulations promulgated and adopted by4e,North Carolina Environmental
Management Commission, and the Federal Water PollutionControl Act, as amended,
p=
is hereby
AirgasfSpecialty Gases
stormwater from a facility located at
ASG Durham
0 United Drive
Durham, NC
urham County
to receiving waters designated as a UT of Northeast Creek, a class.WS-I-V; NSW stream in the
Cape Fear River Basin, in accordance with the discharge limitations_, monitoring requirements,
and other conditions set forth in Parts I, II, III, IV, V and VI hereof.
Note: Draft Permit Dates are Approximate
This permit shall become effective January 1, 2010.
This permit and the authorization to discharge shall expire at midnight on December 31, 2014.
Signed this 111h day of December, 2009.
for Coleen H. Sullins Director
Division of Water Quality
By the Authority of the Environmental Management Commission

• Permit No. NCS000046
TABLE OF CONTENTS
PART I INTRODUCTION
Section A: Individual Permit Coverage
Section B: Permitted Activities
Section C: Location Map
PART H MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
Section k Stormwater Pollution Prevention Pian .
Section B: Analytical Monitoring Requirern nts 1
Section C: Qualitative Monitoring Requirements
X
Section D: On -Site Vehicle°Maintenance.Monitoring Requirements
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL
PERMITS .'
Section A: Compliance and Liability
1. Compliance Schedule
2. Duty to Comply
3. Duty to Mitigate
4. Civil and Criminal Liability
5. Oil and Hazardous Substance Liability
6. Property Rights
7. Severability
.8. Duty to Provide Information
9. Penalties for Tampering
10. Penalties for Falsification of Reports
Section B: .General Conditions
1. Individual Permit Expiration
2. Transfers
3. Signatory'Requirements
t

M-•-^ _ Permit No. NCS000046
4.
Individual Permit Modification, Revocation and Reissuance, or
Termination
5.
Permit Actions
Section C: Operation
and Maintenance of Pollution Controls
1.
Proper Operation and Maintenance
.2-
Need to Halt or Reduce Not a Defense
3.
Bypassing of Stormwater Control Facilities
Section D. Monitoring and Records
_ .
I.
Representative Sampling 4
2.
Recording Results
3.
Flow Measurements`
4.
Test Procedures
5.
Representative Outfall
6.
Records Retention( f ..
7.
Inspection and -Ent y
Section E: Reporting
Requirements
1.
r
Discharge Monitoring Reports ;
2.
Submitting. -Reports
3.
Availability of Reports
4.
Non-Stormwater Discharges
5.
Planned Changes
6.
Anticipated Noncompliance
7.
Spills
8.
Bypass
9.
Twenty-four Hour Reporting
10.
Other Noncompliance
11.
Other Information
PART IV LIMITATIONS REOPENER
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS
PART VI DEFINITIONS
ii

• Permit No. NCS000046
PART I INTRODUCTION
SECTION A: INDIVIDUAL PERMIT COVERAGE
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge stormwater associated with industrial activity. Such
discharges shall be controlled, limited and monitored as specified in this permit.
If industrial materials and activities are not exposed to precipitation or runoff as described in 40
CFR § 122.26(g), the facility may qualify for a No Exposure Exclusion from NPDES stormwater
discharge permit requirements. Any owner or operator wishngto obtain a No Exposure
Certification must submit a No Exposure Certification°NOI form to the.Division; must receive
approval by the Division; must maintain no exposure conditions unless authorized to discharge
under a valid NPDES stormwater permit; and must reapply for the'No Exposure Exclusion once
every five (5) years.
SECTION B: PERMITTED
Until this permit expires or is modified'or'revoked;'the permittee is authorized to discharge
stormwater to the surface waters of North Carolina or separate storm sewer -system that has been
adequately treated and managed,in accordance with the terms and conditions of this individual
permit. All stormwater discharges shall be'in accordance with the conditions of this permit.
Any other point source dischaii-ge_tosurface waters of the state is prohibited unless it is an
allowable ron-stormwater dikhk:ge or is covered by another permit, authorization, or approval.
The stormvater 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` -".LOCATION9P
•
Permit No. NCS000046
NCS000046
N
5
Map Stale 1:30,000
Airlas Specialty Gases
ASG Durham
latitude: 35" 56' W N
Longitude: 780 54'-00" W
CountY: Durham
Receiving Stream: UT of Northeast O-eek
Stream Class: V6-IV; NSW
Sub -basin: 03-06-05 (Cape Fear River Basin)
�-ysrrN�M[�7
,elf lw�►�.���=y� :r Y
Facility Location
Part 1 Page 2 of 2

0
• Permit No. NCS000046
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR
PERMITTED DISCHARGES
SECTION A: STORMWATER POLLUTION PREVENTION PLAN
The Permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to as
the Plan. This Plan shall be considered public information in accordance with Part III, Standard
Conditions, Section E, Paragraph 3 of this individual permit. The Plan shall include, at a
minimum, the following items:
Site Plan. The site plan shall provide a description of the physical facility and the
potential pollutant sources which may be expected to contribute to contamination of
stormwater discharges. The site plan shall contain t� e_following:
(a) A general location map (USGS quadrangle map or appropriately drafted
equivalent map), showing the facility's\location_in relation to transportation routes
and surface waters, the name of the.re6eiving4ater(s) to which the stormwater
outfall(s) discharges, or if the discha & is to a municipal separate storm sewer
system, the name of the municipality acid the ultimate receiving waters, and
accurate latitude and longit� a of the point(s) of discharge. The general location
map (or alternativelythe sitemap) shall identify whether each receiving water is
impaired (on the states-303(d);list of impaired waters) or is located in a
watershed for whicfi`alTMDL has been established, and what the parameter(s)
of concern are: 11' V
(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.
(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
Part 11 Page 1 of 10

•
•
Permit No. NCS000046
B, Paragraph 5., The permitiee shall ie-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 technical and economic feasibility of changing
the methods of operations and/or storage practices to eliminate or reduce exposure
of materials and processes to stormwater. Wherever practical, the permittee shall
prevent exposure of all storage areas, material ---handling operations, and
manufacturing or fueling operations. Infareas:where elimination of exposure is
FV not practical, the stormwater management plan shall -document the feasibility of
diverting the stormwater runoff away &o n areas of potential contamination.
(b) Secondary Containment Requirement and Records. Secondary containment is
required for: bulk storage of liquid materials; storage in any amount of Section
313 of Title III of the Superfund Ar endi tints and Reauthorization Act (SARA)
water priority chemicals; and storage,in any amount of hazardous substances, in
order to prevent leaks and spills 16-r contaminating stormwater runoff. A table
or summary of all such�,tanks and stored materials and their associated secondary
containment areas sl all be.maintained. If the secondary containment devices are
connected to stormwater conveyance systems, the connection shall be controlled
by manually activated valves or other similar devices (which shall be secured
closed with aflocking;mechanism), and any stormwater that accumulates in the
containment a�irea` shall be at a minimum visually observed for color, foam, outfal l
staining, visible sheens and dry weather flow, prior to release of the accumulated
stormwater. Accumulated stormwater shall be released if.found to be
uncontaminated by any material. Records documenting the individual making the
observation, the description of the accumulated stormwater, and the date and time
of the release shall be kept for a period of five 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.
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
-Part I I . Page 2 of 10

i
• Permit No. NCS000046
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 Housekeeping Program. A preventative
maintenance and good housekeeping program shall be developed. The program shall list
all stormwater confrol systems, stormwater discharge outfalls, all on -site_ and adjacent
surface waters and wetlands, industrial activity areas (including material storage areas,
material handling areas, disposal areas, process areas;' -loading and unloading areas, and
� v`
haul roads), all drainage features and structures; and'existing structural BMPs. The
program shall establish schedules of inspections, maintenance; and. housekeeping
activities of stormwater control systems, as well as facilit ,equipment, facility areas, and
facility systems that present a potential for stormwater exposure or stormwater pollution.
Inspection of material handling areas and regular cleaning schedules of these areas shall
be incorporated into the program. Timely compliance with the established schedules for
inspections, maintenance, and housekeeping shalf be recorded in writing and maintained
in the SPPP. "
X
5. Employee Training. Training programs shall be developed and training provided at a
minimum on an annual basis for facility personnel with responsibilities for: spill response
and cleanup, preventative' maintenance activities, and for any of the facility's operations
that have the potential to contaminate stormwater runoff. Facility personnel (or team)
responsible for impld'mentingAe training shall be identified, and their annual training
shall be documented 6yttlejsignature 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 written re -certification that the stormwater outfalls have been
evaluated for the presence of non-stormwater discharges. Each annual update shall
include a documented re-evaluation of the 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
Part II Page 3 of 10

" Permit No. NCS000046
submit a time schedule t&the'Director'for modifying the Plan to meet minimum
requirements.' -The permittee-shall provide certification in writing (in accordance with
Part.IIl, 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 Housekeeping Program at a minimum on
a semi-annual schedule, once during the first half of the year*(January to June), and once
during the second half (July to December), with at least 60 days separating inspection
dates (unless performed more frequently than semi-annually). These facility inspections
are different from, and in addition to, the stormwater discharge characteristic monitoring
required in Part H B and C of this permit.
9. Implementation. The permittee shall im lement,the Plan_, lm lementation of the Plan
shall include documentation of all monitoring3,-measurements; inspections, maintenance -
activities, .and training provided to employeesincluding the"log of the sampling data and
of actions taken to implement BMPs associated with•the industrial activities, including
vehicle maintenance activities. Such documentation shall be kept on -site for a period of
five years and made available to the Directopor the'Director's authorized representative
immediately upon request.
Part 11 Page 4 of 10

• Perm it No. NCS000046
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 0.1 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 begins within 10 hours. T -
Table 1. Analytical Monitoring Re uirementsA
Discharge _
-
Measurement Frequencyl
Sample
Sample
Characteristics
Units.,
Type2
Location3
Total Suspended Solids, TSS
mg1L
semi-annual
Grab
SDO
Chemical Oxygen Demand,
Grab
SDO
CODff
mg/L
semi-annual
' 4
Nitrogen, Total
_m /L .
,y'` �. ._seini-annual
Grab
SDO
Phosphorus, Total
semi-annual
Grab
SDO
pH
standard;'
semi-annual
Grab
SDO
Total Rainfa114 i
J inches_=--
3 semi-annual
Pain Gauge
-
�r; w
Footnotes:Y_=
I Measurement Frequency: Twice-pei• year during a representative storm event.
2 Grab samples 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 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.
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 Period 1 and
Period 2 sample dates unless monthly monitoring has been instituted under a Tier Two
response.
Part II Page 5 of 10

•
Permit No. NCS000046
Table 2. Monitoring Schedule
12
_ . Monrtoring period
...
`Sample Nunrber. -
Start _ a;
=, End
Year 1 Period 1
1
January 1, 2010
June 30, 2010
Yeaf.1_:'Period 2
2.
July 1, 2010
December 31, 2010
Year 2 — Period 1
3
January 1, 2011
June 30, 2011
Year 2 — Period 2
4
July 1, 2011
December 31, 2011
Year 3 - Period h
.5
January 1, 2012
June 30, 2012
Year 3 — Period 2. •
6
July 1, 2012
December 31, 2012
Year 4 — Period 1
7
January 1, 2013
June 30, 2013
Year 4 — Period 2
S
July 1, 2013
December 31, 2013
Year 5 — Period 1-
9
January 1,,201,4-
June 30, 2014
Year 5 — Period 2
10.
July,1,42014
December 31,'2014
Footnotes:
1 Maintain semi-annual monitoring during permit renewal procc ss, if at,the expiration of the Individual
Permit, the permittee has submitted an application for renewal.of coverage before the submittal deadline,
the permittee will be considered for renewed coverage. T he=applicant must continue semi-annual
monitoring until the renewed Certificate of Coverage, isassued
2 If no discharge occurs during the sampling period, the'permittee must submit a monitoring report indicating
"No Flow" within 30 days of the end of the six-month f sampling period.
The permittee shall report the analytical results from the first sample with valid results within the
monitoring period. The permitteeAa11 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
f
the permittee's Stormwater Pollution Prevention Plan (SPPP). Exceedences of benchmark values
require the permittee to increase.monrtornng, 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.
Table 3. Benchmark Values for Analytical Monitoring
Discharge Characteristics
Units -
Benchmark
Total Suspended Solids, TSS
mg/L
100
Chemical Oxygen Demand,
COD
mg/L
120
Nitrogen, Total
mg/L,
30
Phosphorus, Total
mg/L
2
pH
standard
6-9
Part 11 Page 6 of 10

i
Permit No. NCS000046
Tier One
If: The first valid sampling results are above a benchmark value, or outside of the benchmark range, for any
parameter at any outfall;
Then: The permittee shall:
I . 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 parameters of concern, or to bring concentrations
within the benchmark range.
4. Implement the selected actions within two months of the inspection.
/-- :4e,.
5. Record each instance of a Tier One response in the Stormwater.Pollution Prevention Plan. Include
the date and value of the benchmark exceedence, the inspection date the personnel conducting the
inspection, the selected actions, and the date the selected.actions were implemented.
V \�,,,"
Tier Two
If: During the term of this permit, the first valid sampling results from two consecutive monitoring periods
are above the benchmark values, or outside of,the benchmark range, for any specific parameter at a
specific dischar a outfall;'
Then: The permittee shall:
1. Repeat all the required actio.n`s outlined above in Tier One.
`"' „
2. Immediately ins`itate monthly monitoring for all parameters at every outfall where a sampling result
exceeded the benchmark'walue 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.
3. If no discharge occurs during the sampling period, the permittee is required to submit a monthly
monitoring report indicating "No Flow" to comply with reporting requirements.
A Maintain a record of the Tier Two response in the Stormwater Pollution Prevention Plan.
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 Regional Office Supervisor in writing within
30 days of receipt of the fourth analytical results. DWQ may but is not limited to:
• require that the permittee revise, increase, or decrease the monitoring frequency for the remainder
of the permit;
• require the permittee to install structural stormwater controls;
• require the permittee to implement other stormwater control measures; or
• require that the permittee implement site modifications to qualify for the No Exposure Exclusion.
Part II Page 7 of 10

Permit No. NCS000046
This site discharges to impaired waters experiencing problems with_turbid4yand low dissolved
oxygen. There is currently a TMDL for fecal coliform in Northeast Creek. If another Total ' .
Maximum Daily Load (TMDL) is approved for this segment of Northeast Creek, the permittee .
may be required to monitor for the pollutant(s) of concern in the future.and submit results to the
Division of Water Quality. The Division will consider the monitoring results in determining
whether additional BMPs are needed to control the pollutant(s) of concern to the maximum
extent practicable.
If additional BMPs are needed to achieve the requiredlevel 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
representative outfall status and shall be performed
monitoring event. [If analytical monitoring is not r
annual qualitative monitoring.] Qualitative monito
effectiveness of the Stormwater Pollution Preventi
stormwater pollution. , (�,' / c
In the event an atypical condition is
document the suspected cause of the"
discovery. This documentation will 1
Table 4. Oualitative
ach stormwater outfall regardless of
pecified in Table 4, during'the analytical
red; the permittee still must conduct semi-'.
'is -for the purpose of evaluating the
la (SPPP) and assessing new sources of
4ed,at a stormwater discharge outfall, the permittee shall
ondttton and any actions taken in response to the
ma ntained with the SPPP.
Reouirements .
'Discharge Characteristics
..Frequency];
.'. Monitoring
Location
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'
SDO
Erosion or deposition at the outfall
semi-annual
SDO
Other obvious indicators
of stormwater pollution
semi-annual
I
SDO
L
Footnotes:
1 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 permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the
PartlI Page 8 of 10

Permit No. NCS000046
permittee 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 Monitoring Location: Qualitative monitoring shall be performed at each stormwater discharge outfall (SDO)
regardless of representative outfall status.
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 Tablet (Section B). All analytical
monitoring shall be performed during a representativeistorm: event.
fr
Table 5. Analytical Monitoring Requirements for,On-Site Vehicle Maintenance
Discharge Characteristics.
Units
Measurement
-Sample
Sample
Fre uenc
Type2
Location3
H
standard , i
; kmt-annual
Grab
SDO
TPH
mg/l.�t'
. `._semi-annual
Grab
SDO
EPA Method 1664 (SGT-HEM)]
Total Suspended Solids
frig k-
semi-annual
Grab
SDO
Total Rainfall4;.
inches'
semi-annual
Rain gauge
-
New Motor Oil Usage
;- gallons%month
semi-annual
Estimate
-
Footnotes:
1 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 permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the
permittee 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 stonnwater detention pond a grab sample of the discharge from the
pond shall be collected within the first 30 minutes of discharge from the pond.
3 Sample Location: Samples shall be collected at each stormwater discharge outfall (SDO) that discharges
stormwater runoff from area(s) where vehicle maintenance activities occur.
4 For each sampled representative storm event the total precipitation must be recorded. An on -site or local rain
gauge reading must be recorded.
Part 11 Page 4 of 10

Permit No. NCS000046
Monitoring results shall be compared to the benchmark values in Table 6. The benchmark
values in Table 6 are not- permit limits but should be used as guidelines for the permittee's
Stormwater Pollution Prevention.Plan (SPPP).. Exceedences of benchmark values require 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 Analytical Monitoring
Discharge' Characteristics
Units
- -'-Benchmark=
pH _
standard
6-9
TPH
mg/L
13
[EPA Method 1664 (SGT-HEM)]
Total Suspended Solids
mg/L
44
ws
Part II Page 10 of 10

0
0 Permit No. NCS000046
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS
SECTION A: COMPLIANCE AND LIABILITY
Compliance Schedule
The permittee shall comply with Limitations and Controls specified for stormwater discharges in
accordance with the following schedule:
Existing Facilities already operating but applying for permit coverage for the first time: The Stormwater
Pollution Prevention Plan shall be developed and implemented within 12 months of the effective date of the
initial permit and updated thereafter on an annual basis. Secondary containment, as specified in Part I1,
Section A, Paragraph 2(b) of this permit, shall be accomplished within;12 months of the effective date of
the initial permit issuance.
New Facilities applying for coverage for the first time arld existing facilities previously permitted and
r
applying for renewal under this permit: The Stormwater Pollution Prevention Plan shall be developed and
implemented prior to the beginning of discharges from thetoperation of the industrial activity and be
updated thereafter on an annual basis. Secondary containment, as;specified in Part I1, Section A, Paragraph
2(b) of this permit shall be accomplished prior to.the-beginning-of discharges from the operation of the
industrial activity. % % \ j
f "
Duty,to Comply
/A f /�
The permittee must comply with -all conditions of this individual permit. Any permit noncompliance
constitutes a violation of the Clean- Water Act.and is grounds for enforcement action; for permit
- _.. '--
termination, revocation and reissuance, or modification; or denial of a permit upon renewal application.
a. The permittee shall coin ly.with standards or prohibitions established under section 307(a) of the
Clean Water Act fjf. toxic -pollutants within the time provided in the regulations that establish these
standards or prohibitions, even if the permit has not yet been modified to incorporate the
requirement.
b. The Clean Water Act provides that any person who violates a permit condition is subject to a civil
penalty not to exceed $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)]
C. 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].
d. Any person may be assessed an administrative penalty by the Director for violating section 301,
302, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any
of such sections in a permit issued under section 402 of the Act. Administrative penalties for Class
1 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 III Page 1 of 8

Permit No. NCS000046
$10,000 per day'for each day during which the violation continues, with the maximum amount of
any Class 11 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.
4. Civil and Criminal Liabili
Except as provided in Part 11I, Section C of this permit regarding bypassing of stormwater control facilities,
nothing in this individual permit shall be construed to relieve the permittee from any responsibilities,
liabilities, or penalties for noncompliance pursuant to NCGS 143-215.3,143-215.6A, 143-215.613, 143-
215.6C or Section 309 of the Federal Act, 33 USC 1319. Furthermore, the permittee is responsible for
consequential -damages, such as fish kills, even though the responsibility for effective compliance may be
temporarily suspended. "/;, Sa -'�\' 0
Oil and Hazardous Substance Liabili
Nothing in this individual permit shall be construed•to-precliude the institution of any legal action or relieve the permittee from any responsibilities, liabilit ie&rorrpenaltiesto which the pennittee is or may be subject to
under NCGS 143-215.75 et seq. or Section 311 of the�Federal-Act, 33 USC 1321.
6. PropeM Rights r
The issuance of this individual' a hit does not convey any property rights in either real or personal
property, or any exclusive privileges; nor does -it authorize any injury to private property or any invasion of
personal rights, nor any infrmgemenfof Federal, State or local laws or regulations.
Severability
The provisions of this individual permit are severable, and if any provision of this individual permit, or the ,
application of any provision of this individual permit to any circumstances, is held invalid, the application
of such provision to other circumstances, and the remainder of this individual permit, shall not be affected
thereby.
Duty to Provide Information .
The permittee shall furnish to the Director, within a reasonable time, any information which the Director
may request to determine whether cause exists for modifying, revoking and reissuing, or terminating the
permit issued pursuant to this individual permit or to determine compliance with this individual permit. The
permittee shall also furnish to the Director upon request, copies of records required to be kept by this
individual permit.
9. Penalties for Tampering
The Clean Water Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate,
any monitoring device or method required to be maintained under this individual permit shall, upon
conviction, be punished by a fine of not more'than $10,000 per.violation, or by imprisonment for not more
than 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 I❑ Page 2 of 8

i
• Permit No. NCS000046
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 pennittee is not authorized to discharge after the expiration date.,An order to receive automatic
authorization to discharge beyond the expiration date, the permittee�shall submit forms and fees as are
required by the agency authorized to issue permits no lat6,tham180'days prior to the expiration date. Any
permittee that has not requested renewal at least 180 days `prar to expiration; or any permittee that does not
have a permit after the expiration and has not requested renewal at least.-180 days prior to expiration, will be
subjected to enforcement procedures as provided in NCGS.�§,143 2153.E and 33 USC 1251 et. seq.
Transfers
This permit is not transferable to any person ezcept`after,riotice to and approval by the Director. The
Director may require modification or revocatiowand reissuance of the permit to change the name and
incorporate such other requirements as may -be necessary under the Clean Water Act. The Permittee is
required to notify the Division in writing in•the event the permitted facility is sold or closed.
. `. I- r?
Signatory Requirements
All applications, reports, or,informatio submitted to the Director shall be signed and certified.
a. All applications to be'covered under this individual permit shall be signed as follows:
(1) 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. NCS000046
responsibility, or an individual or position having overall -responsibility for enJironmental
matters for the company. (A duly authorized representative may thus be either a named
individual or any individual occupying a named position.); and
(3) - The written authorization is submitted to the Director.
C. Any person signing a document under paragraphs a. or b. of this section shall make the following
certification:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or.
persons who manage the system, or those persons directly responsible for gathering the -
information, the information submitted is, to,the best of my knowledge and belief, true; accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for- iowing violations."
/ _ / _ _ //
4. Indivi
The issuance of this individual permit does not prohibii,the Director from reopening and modifying the
individual permit, revoking and reissuing the individual!permi\ or terminating the individual permit as
allowed by the laws, rules, and regulations containedJi Title 40, Code of Federal Regulations, Parts 122
and 123; Title 15A of the North Carolina Ad_n nistr'l/ativeCode, Subchapter 2H .0100; and North Carolina
General Statute 143-215.1 et al.
Permit Actions
The permit may be modified,;r"e`voked and're issued, or terminated for cause. The notification of planned
changes or anticipated noncompliance d s not stay any individual permit condition.
SECTION C: OPERATION AND -MAINTENANCE OF POLLUTION CONTROLS
Proper Operation and Maintenance
The permittee shall at all times properly operate and maintain all facilities and systems of treatment and
control (and related appurtenances) which are installed or used by the permittee to achieve compliance with
the conditions of this individual permit. Proper operation and maintenance also includes adequate
laboratory controls and appropriate quality assurance procedures. This provision requires the operation of
back-up or auxiliary facilities or similar systems which are installed by a permittee only when the operation
is necessary to achieve compliance with the conditions of this individual permit.
2. Need to Halt or Reduce Not a Defense
It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the condition of this individual permit.
3. Bypassing of Stormwater Control Facilities
Bypass is prohibited and the Director may take enforcement action against a permittee for bypass unless:
a. - . Bypass was unavoidable to prevent loss of life, personal injury or severe property damage; and
Part I I I Page 4 of 8

•
• Permit No. NCS000046
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, Sectiont of this permit.
If the Director determines that it will meet the three conditions listed above, the Director may approve an
anticipated bypass after considering its adverse effects.
SECTION D: MONITORING AND RECORDS
Representative Sampling
Samples collected and measurements taken, as requiredaierein shall b'ei-cliaacteristic of the volume and
nature of the permitted discharge. Analytical sampling-sliall'be perf rnied during a representative storm
event. Samples shall be taken on a day and time that is.characteristic of the discharge. All samples shall be
taken before the discharge joins or is diluted by any other wastestream, body of water, or substance.
Monitoring points as specified in this permit shall not.te changed without notification to and approval of
the Director. �� h, - f
Recording Results
For each measurement, sample`, inspectibn or'.maintenance activity performed or collected pursuant to the
requirements of this individual permit;tithe pernittee shall record the following information:
a. The date, exact place, and time of sampling, measurements, inspection -or maintenance activity;
t <w
b. The individual(g)who pperf ed 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. NCS000046
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 outfalls.
Records Retention
Visual monitoring shall be documented and records maintained at th/facility along with the Stormwater
Pollution Prevention Plan. Copies of analytical monitoring results .shall also be maintained on -site. The
permittee shall retain records of all monitoring information? including all calibration and maintenance
records and all original strip chart recordings for continuous rrionitoi in -instrumentation, and copies of all
reports required by this individual permit for a period of at'1 ast 5 years- from the date of the sample,
measurement, report or application. This period may be extended by request of the Director at anytime.
7. Ins ection and Enta
The permittee shall allow the Director, or anauthorized representative (including an authorized contractor
Pf
acting as a representative of the Director)r in the case f a facility which discharges through a municipal
separate storm sewer system,.an uthorized�represent [ive of a municipal operator or the separate storm
sewer system receiving the discharge, upon the presentation of credentials and other documents as may be
required by law, to; % t;
a. Enter upon the perrnittee's premises where a regulated facility or activity is located or conducted,
or where records must b kept under the conditions of this individual permit;
b. Have access to and -copy, at reasonable times, any records that must be kept under the conditions of
this individual permit;
C. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment),
practices, or operations regulated or required under this individual permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring individual permit compliance
or as otherwise authorized by the Clean Water Act, any substances or parameters at any location.
SECTION E: REPORTING REQUIREMENTS
Discharge Monitoring Reports
Samples analyzed in accordance with the terms of this permit shall be submitted to the Division on
Discharge Monitoring Report forms provided by the Director. Submittals shall be delivered to the Division
no later than 30 days from the date the facility receives the sampling results from the laboratory.
The permittee shall submit an Annual Summary Data Monitoring Report to the appropriate DWQ Regional
Office in February of each year. The submittal shall be on forms supplied by the Division.
Part III Page 6 of 8

0 Permit No. NCS000046
2.
3.
E, I
611
6.
When no discharge has occurred from the facility during the report period, the permittee is required to
submit a discharge monitoring report, within 30 days of the end of the six-month sampling period, giving all
required information and indicating "NO FLOW' as per NCAC T 15A 0213 .0506.
The permittee shall record the required qualitative monitoring observations on the SDO Qualitative
Monitoring Report form provided by the Division, and shall retain the completed forms on site. Visual
monitoring results should not be submitted to the Division, except upon DWQ's specific requirement to do
so.
Submitting Reports
Two signed copies of Discharge Monitoring Reports (DMRs) shall be submitted to:
Central Files
Division of Water Quality,',_,.,
1617 Mail Service Center
Raleigh, North Carolina�2769,9:1161:
In addition, a separate signed Annual Summary DMR copy shall be submitted to the local DWQ Regional
Office (RO) by March 1 of each year.
Addresses for each RO and the counties covered by.each. RO can be found here:
http:/Iwww.enr.state.nc.us/htmi/re�ionaloffices.litmi.,Tbe permittee shall retain the completed originals
on site. Visual monitoring results should not be,submitted to the Regional Offices or Central Files unless
r_
specifically requested by DWQ:`,... µ
Availabili1y of Reports
Except for data determined to be confidential under NCGS 143-2153(a)(2) or Section 308 of the Federal
Act, 33 USC 1318, all reports prepared in accordance with the terms shall be available for public inspection
at the offices of the Division of.Water Quality. As required by the Act, analytical data shall not be
considered confidential. Knowingly. making any false statement on any such report may result in the
imposition of criminal penalties as provided for in NCGS 143-215.613 or in Section 309 of the Federal Act.
Non-Stormwater Discharges
If the storm event monitored in accordance with this Individual Permit coincides with a non-stormwater
discharge, the permittee shall separately monitor all parameters as required under the non-stormwater
discharge permit and provide this information 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.
Part III Page 7 of 8

•
Permit No. NCS000046
7. Spills s
The permittee shall report to the local DWQ Regional Offce,'within 24'hours, all significant spills as
defined in Part VI of this permit. Additionally, the permittee shall report spills including: any oil spill of 25 .
gallons or more, any spill regardless of amount that causes a sheen on surface waters, any oil spill
regardless of amount occurring within 100 feet of surface waters, and any oil spill less than 25 gallons that
cannot be cleaned up within 24 hours.
8. Bypass
9.
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.
Twenty-four Hour Reporting I[t M
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 tl circumstances.
The written submission shall contain a des nption'ofthe' noncompliance, and its causes; the period of
noncompliance, including exact dates and tunes,�and'ifthe noncompliance has not been corrected, the
anticipated time compliance is expected't continue; and steps taken or planned to reduce, eliminate, and
prevent reoccurrence of the noncompliance
The Director may waive
within 24 hours.
on a.case-by-case basis if the oral report has been received
10. Other Noncompliance
The permittee shall report all instances of noncompliance not reported under 24 hour reporting at the time
monitoring reports are submitted.
11. Other information
Where the permittee becomes aware that it failed to submit any relevant facts in a Notice of Ihtent to be
covered under this Individual Permit or in any report to the Director, it shall promptly submit such facts or
information.
Part III Page 8 of 8

•
NCS000046
PART IV LIMITATIONS REOPENER
This individual permit shall be modified or alternatively, revoked and reissued, to comply with any applicable
effluent guideline or water quality standard issued or approved under Sections 302(b) (2) (c), and (d), 304(b) (2) and
307(a) of the Clean Water Act, if the effluent guideline or water quality standard so issued or approved:
a. Contains different conditions or is otherwise more stringent than any effluent limitation in the individual
permit; or
b. Controls any pollutant not limited in the individual permit.
The individual permit as modified or reissued under this paragraph -,shall also contain any other requirements in the
Act then applicable." --
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS fir'
The permittee must pay the administering and compliance monitoring fee within 30 (thirty) days after being billed by
the Division. Failure to pay the fee in timely manner in accordance with 15A NCAC 2H .0105(b)(4) may cause this
Division to initiate action to revoke thelndividual:Permit.
PARTY] DEFINITIONS
Act x�
See Clean Water Act.
Allowable Nan-Stormwater Discharges
This permit regulates stormwater discharges. Non-stormwater discharges which shall be allowed in the
stormwater conveyance system are:
(a) All other discharges that are authorized by a non-stormwater NPDES permit.
(b) . Uncontaminated groundwater, foundation drains, air -conditioner condensate without added
chemicals, springs, discharges of uncontaminated potable water, waterline and fire hydrant
flushings, water from footing drains, flows from riparian habitats and wetlands.
(c) Discharges resulting from fire -fighting or fire -fighting training.
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. More information on BMPs can be found at:
http:t/cfpub.epa.gov/npdes/storrnwater/menuofbmps/index.cfhL
4. 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.
Bulk Storage of Liauid Products
Liquid raw materials, manufactured products, waste materials or by-products with a single above ground
storage container having a capacity of greater than 660 gallons or with multiple above ground storage
containers located in close proximity to each other having a total combined storage capacity of greater than
1,320 gallons.
Parts IV, V and VI Page 1 of

•
Permit No. NCS000046
6. Certificate of Coverage
The Certificate of Coverage (COC) is the cover sheet which accompanies the Individual Permit upon
issuance and lists the facility name, location, receiving stream, river basin, effective date of coverage under
the permit and is signed by the Director.
7. Clean Water Act
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC
�251, et. seq. ,
8. Division or DW
The Division of Water Quality, Department of Environment and Natural'Resources.
9. Director j
The Director of the Division of Water Quality, the permit issuing authority.
10. EMC
The North Carolina Environmental Management Commission:
if. Grab Sample 4
An individual sample collected instantaneously. Grab samples that will be analyzed (quantitatively or
qualitatively), must be taken within the.first 30 minutesorf discharge.
12. Hazardous Substance
--,
Any substance designated under,40 CFR Part
;1'16 pursuant to Section 311 of the Clean Water Act.
13, Landfill 1 v
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.
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,
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)
16. Notice of Intent
The state application form which, when submitted to the Division, officially indicates the facility's notice of
intent to seek coverage under an Individual Permit.
17. Permiee
The owner or operator issued a certificate of coverage pursuant to this Individual Permit.
Part VI Page 2 of 4 Pages

a* Permit No. NCS000046
18. Point Source Discharse of Stormwater
Any discernible, confined and discrete conveyance including, but not specifically limited to, any pipe, ditch,
channel, tunnel, conduit, well, or discrete fissure from which stormwater is or may be discharged to waters
of the state.
19. Representative Storm Event
A storm event that measures greater than 0.1 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 begins within 10. hours.
20. Represent atiye,Outfall Status
When it is established that the discharge of stormwater runoff from a single outfall is representative of the
discharges at multiple outfalls, the DWQ may grant representative outfall status. Representative outfall
status allows the pennittee to perform analytical monitoring at a reduced number of outfalls.
r �
21. Se ondary Containment
Spill containment for the contents of the single largest tank- ithin the containment structure plus sufficient
freeboard to allow for the 25-year, 24-hour storm event:- `.
V
22, Section 313 Water Priority Chemical
A chemical or chemical category which;
a. Is listed in 40 CFR 372.65 pursuant`fo Section 3-f 3 of Title Ill 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. Meets at least one ofhe following criteria:
(1) Is listed in appendix`D'of40 CFR part 122 on Table II (organic priority pollutants), Table
III (certain-metals,£cyanides, and phenols) or Table IV (certain toxic pollutants and
hazardous subst n es);
(2) Is listed�as-a'ha ardous 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.
23. Severe Property Damage
Means substantial physical damage to property, damage to the control facilities which causes them to
become inoperable, or substantial and permanent loss of natural resources which can reasonably be
expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused
by delays in production.
24. 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.
25. 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 1 17.21) or section 102 of
CERCLA (Ref: 40 CFR 302.4).
Part VI Page 3 of Pages

Permit No. NCS000046
26. Stormwater Discharge Outfall 5DO
The point of departure of stormwater from a discernible, confined, or discrete conveyance, including but not
limited to, storm sewer pipes, drainage ditches, channels, spillways, or channelized collection areas, from
which stormwater flows directly or indirectly into waters of the State of North Carolina.
27. Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following rainfall or as a
result of snowmelt.
28. Stormwater Associated with Industrial Activity
The discharge from any point source which is used for collecting and conveying stormwater and which is
directly related to manufacturing, processing or raw material storage areas at an industrial site. Facilities
considered to be engaged in "industrial activities" include those activities defined in 40 CFR 122.26(b)(14).
The term does not include discharges from facilities or activities excluded from the NPDES program.
29. Stormwater Pollution Prevention Plan
A comprehensive site -specific plan which details measures -and practices to reduce stormwater pollution and
is based on an evaluation of the pollution potential of the'site-
30. Total Maximum Daily Load (TMDL)
TMDLs are written plans for attaining and
water body and pollutant. (A list of approv
http://h2o.enr.state.nc.us/tmdO r i
quality standards, in all seasons, for a specific
state of North Carolina can be found at
31. Toxic Pollutant N"N
Any pollutant listed as toxic under Section 307(a)(1) of the Clean Water Act.
32. Vehicle Maintenance Activity
Vehicle rehabilitation, mechanical repairs, painting, fueling, lubrication, vehicle cleaning operations, or
airport deicing operations.
33. 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.
34. ' 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 4 of 4 Pages

e
Airgas Specialty Gases
630 unhad Drive
Uurharn, NC 27713
Phone [phone]
Fax [phone]
www.airgas,com
September 17, 2009
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
Stormwater Permitting Unit
RE: NCS000046
Dear Sus,
Airgas Speciality Gases (ASG) purchased this facility from National Specialty Gases (NSG) and
assumed control of the facility in April, 2009. NSG did not renew the permit in 2004 and
consequently, analytical monitoring and visual monitoring were not completed for the remaining
years at this facility. ,ASG is committed to fulfill North Carolina's Stormwater Discharge Permit
and to conduct and implement all the necessary requirements of the state.
ASG will employ all of the Best Management Practices contained in their new SW3P, some of
which are:
• Good housekeeping measures
• Garbage, trash and waste material are collected in dedicated containers
• Any drips or spills to be cleaned up immediately and disposed of properly
• Clearly mark and inspect all containers for use
• Provide necessary clean up materials
• Provide erosion control measures
• Establish records of inspections and maintenance
• Employee training and record keeping
There have not been any significant changes at the facility.
Best regards,
C4,1, a, G�,,,.s'�,
Charlie Winston
Plant Manager
Airgas Speciality Gases
t fli, OCT
i
#5000

of wAI P. it Coverage Amilk
dt Rene Application Form
' National Pollutant Discharge Elimination System Permit Number046
rlCs000�46
Stormwater Discharge Permit
The following is the information currently in our database for your facility. Please review this information carefully and make all
corrections/additions as necessary in the space provided to the right of the current information.
Owner Affiliation Information
Owner / Organization Name:
Owner Contact:
Mailing Address:
Phone Number.
Fax Number:
E-mail address:
'Reissued Permit will be moiled to the owner address
National Specialty Gases
John Harris
PO Box 12013
RTP, NC 27709
[phone]
Facility/Permit Contact Information
Facility Name: Fayetteville Plant
Facility Physical Address: 630 United Dr
RTP, NC 27709
Facility Contact: John Harris
Mailing Address:
Phone Number
Fax Number.
E-mail address:
Discharee Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls:
910-544.3772
r
ch ch Ord
Imualred Waters/ rMDL
Does this facility discharge to waters listed as impaired or waters with a finalized TMDU ❑ Yes 0 No � Don't Know
( for information on these waters refer to http:I/h2o.enr.state.nc.Lalsulimpairec Waters TMDLI )
CERTIFICATION
I certify that I am familiar with the Information contained in the application and that to the best of my knowledge and belief such
information is
true, complete and accurate.
Signature & Date -] , 18. 0 q
Print or type name of person signing above Title
Please return this completed renewal application form to: Stormwater Permitting Unit
Attn: Brian Lowther
1617 Mail Service Center
Raleigh, North Carolina 27699-1617

North Carolina Division of Water Quality - Stormwater Permitting Unit
Facility Name: Airgas Speciality Gases
Permit Number. NCS000046
Location Address: 630 United Dr
Durham, NORTH CAROLINA 27713
County: Durham
"i certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments were
developed and implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information
gathered is, to the best of my knowledge and belief, true, accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the terms and conditions of the stormwater discharge
penrlt."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory requirements) and return this Cerdfication. DO NOT
SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
/ l,.
Signature ele.vrt� �C.►'✓J�Date q . 1 q
CrX&Ao. inSAotin P ,a
Print or type name of person signing above Title
SPPP Certification 5/09

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NATIONAL •WELDERS
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2

•
C�
SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPIDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
(Do not submit the site Stormwater Pollution Prevention Plan)
Initials
C,,o — 1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities (including storage of materials, disposal areas, process areas and
loading and unloading areas), drainage structures, drainage areas for each outfall,
building locations and impervious surfaces should be clearly noted.
2. A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data H
3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
parameters surveyed, observations, and date monitoring conducted
Cw 4. A summary of the Best Management Practices utilized at the permitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. If the implementation of any-BMP's is planned, please include
information on these BMP's.
CW _- _ 5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes, changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
CyJ 6. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal subrni—"A, then the last years monitoring results should be submit
within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal
waiting on lab results)
Representative storm sampling may now be conducted anytime during the year (the April
to November window has been eliminated) and the representative rainfall event is now defined
as a storm event that measures greater than 0.1 inches and is preceded by at least 72 hours in
which no storm event measuring greater than 0.1 inches has occurred.

• 0
QUARTERLY VISUAL SAMPLING and RAIN FALL AMOUNTS
JAN. 1 TO MARCH 31, APRIL 1 TO JUNE 30
JULY 1 TO SEPT. 30, OCT. 1 TO DEC. 31
COMPANY: AIRGAS SPECIALITY GASES -Durham, NC
ADDRESS: 630 United Drive
CITY: Durham, NC 27713
DATE: Q . l'1
TIME: 3:OC>nr,,,
SAMPLIER: C rite,yV iK6�r
OUTFALL NO. S W QQ d
NATURE OF DISCHARGE: lerq,%v%
3 "
RAINFALL AMOUNT: f�
RAINFALL DURATION_ g Q q o.nck er gs;_ q S �K
VISUAL QUALITY:
COLOR, ODOR: Ct�pn.e- To near
FLOATING OR SETTLED SOLIDS:
FOAM:
OIL SHEEN: p
COMMENTS:
C: =rnents and SettingslChariae Winston\ ocal SetiingsVemporary Internet Fifes10LK901QuartV'lsua!-NC

AIFFAA
L
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
National Specialty Gases
ATTN: John Harris, or Successor
PO Box 1.201.3
RTP, NC 27709
Dear Permittee:
Division of Water Quality
Coleen H. Sullins
Director
September 17, 2009
Dee Freeman
Secretary
Cri
- r
l�
SEP
!a 2 12009
I
,DENR RAZE,::'
Subject: NPDES Stormwater Permit Coverage Renewal
National Specialty Gases
Permit Number NCS000046
Durham County
Your facility is currently covered for stormwater discharge under NPDES Permit NCS000046. This
permit expired on December 31, 2004. To assure consideration for continued coverage under your
individual permit, you must apply to the Division of Water Quality (DWQ) for renewal of your permit.
Enclosed you will find an individual permit Renewal Application Form, Supplemental Information
request, and Stormwater Pollution Prevention Plan Certification for your facility.
Filing the application form along with the requested supplemental information will constitute your
application for renewal of this permit. Until your permit renewal is completed and you receive a new
permit, please continue to comply with all conditions and monitoring requirements in your expired
NPDES stormwater permit.
The application and supplement must be completed and -returned to DWQ by November 17, 2009.
Failure to request renewal within this time period will result in delay of your permit renewal and may
result in a civil assessment. Discharge of stormwater from your facility without coverage under a valid
stormwater NPDES permit would constitute a violation of NCGS 143-215.1 and could result in
assessments of civil penalties of up to $25,000 per day.
If you have any questions regarding permit renewal procedures please contact Brian Lowther of the
Stormwater Permitting Unit at (919)-807-6368 or [e-mail].
Sincerely,
Bradley Bennett, Supervisor
Stormwater Permitting Unit
Cc: Central Files
SPU Files
Raleigh Regional office
Ken Jones - Sent electronically to [e-mail]
i
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 One
Phone: 9I M07-63001 FAX: 91M07- 4921, Customer Service: "77-623-6748 North C arol i na
Internet www.nmaterqualily.oig .
Naturally
An Equal Opportunity 1 Affirmative Acdon Employer

o�oFW�=FgoG Permit Co*ge .
Renewal Application Form
National Pollutant Discharge Elimination System Permit Number
Stormwater Discharge Permit NCS000046
The following is the information currently in our database for your facility. Please review this information carefully and
make all corrections/additions as necessary in the space provided to the right of the current information.
Owner Affiliation Information
Owner / Organization Name:
Owner Contact:
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
* Reissued Permit will be mailed to the owner address
National Specialty Gases
John Harris
PO Box 12013
RTP, NC 27709
[phone]
Facifitv/Permit Contact Information
Facility Name:
Fayetteville Plant
Facility Physical Address:
630 United Dr
RTP, NC 27709
Facility Contact:
John Harris
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
Discharge Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls
910-544-3772
Impaired Wate CUIL4DL
Does this facility discharge to waters listed as impaired or waters with a finalized TMDL? 0 Yes ❑ No ❑ Don't Know
( for information on these waters refer to http://h2o. enr.state. nc. us/su/Impaired Waters TMDU )
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and
belief such information is true, complete and accurate.
Signature
Print or type name of person signing above
Date
Title
Please return this completed renewal application form to: Stormwater Permitting Unit
Attn: Brian Lowther
1617 Mail Service Center
Raleigh, North Carolina 27699-1617

t
Permit: NCS000046
SOC:
County: Durham
Region: Raleigh
Compliance Inspection Report
Effective: 12/10/99 Expiration: 12/31/04 Owner: National Specialty Gases
Effective: Expiration: Facility: National Specialty Gases
630 United Dr
Contact Person: John Harris
Directions to Facility:
System Classifications:
Primary ORC:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Title:
Inspection Date: 09116/2009 Entry Time: 03:00 PM
Primary Inspector: Mack K Wiggins
Secondary Inspector(s):
Reason for Inspection: Routine
Permit Inspection Type: Stormwater Discharge, Individual
Facility Status: Q Compliant fl Not Compliant
Question Areas:
0 Storm Water
(See attachment summary)
Research Triangle Park NC 27709
Phone: [phone]
Certification:
Exit Time: 06:00 PM
Phone:
Phone: [phone]
Inspection Type: Compliance Evaluation
Page: 1

Permit: NCS000046 Owner - Facility: National Specialty Gases
Inspection Date: 09/16/2009 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Page: 2

• 0
Permit: NCS000046 Owner - Facility: National Specialty Gases
Inspection Date: 09/16/2009 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Stormwater Pollution Prevention Plan Yes No NA NE
Does the site have a Stormwater Pollution Prevention Plan? n n n n
# Does the Plan include a General Location (USGS) map?
n
n
n n
# Does the Plan include a "Narrative Description of Practices"?
n
n
n n
# Does the Plan include a detailed site map including outfall locations and drainage areas?
n
n
n n
# Does the Plan include a list of significant spills occurring during the past 3 years?
n
n
n n
# Has the facility evaluated feasible alternatives to current practices?
n
n
n n
# Does the facility provide all necessary secondary containment?
n
n
n n
# Does the Plan include a BMP summary?
n
n
n n
# Does the Plan include a Spill Prevention and Response Plan (SPRP)?
n
n
n n
# Does the Plan include a Preventative Maintenance and Good Housekeeping Plan?
n
n
n n
# Does the facility provide and document Employee Training?
n
n
n n
# Does the Plan include a list of Responsible Party(s)?
n
n
n n
# Is the Plan reviewed and updated annually?
n
n
n n
# Does the Plan include a Stormwater Facility Inspection Program?
n
n
n n
Has the Stormwater Pollution Prevention Plan been implemented?
n
n
n n
Comment:
Qualitative MoniW n9
Yes
No
NA NE
Has the facility conducted its Qualitative Monitoring semi-annually?
n
n
n n
Comment:
Analytical Monitoring
Yes
No
NA NE
Has the facility conducted its Analytical monitoring?
n
n
n n
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas?
n
n
n n
Comment:
Permit and Outfalls
Yes
No
NA
NE
# Is a copy of the Permit and the Certificate of Coverage available at the site?
n
n
n
n
# Were all outfalls observed during the inspection?
n
n
n
n
# if the facility has representative outfall status, is it properly documented by the Division?
n
n
n
n
# Has the facility evaluated all illicit (non stormwater) discharges?
n
n
n
n
Comment:
Page: 3

7.
]D.P®I�PREN'1OPT��ZT�
STORM PEYOA.. ON
I► -
CERTiFTCATION
North Carolina Division of Water Quality - Stormwater Permitting Unit
Facility Name: Airgas Speciality Gases
Permit Number: NC5000046
Location Address: 630 United Or
Durham, NORTH CAROLINA 27713
County: Durham
"l certify, under penalty of law, that the Starmwater Pollution Prevention Plan (SPPP) document and all attachments were
developed and Implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel property. gather and evaluate the information required by the SPPP. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the informaation, the information
gathered is, to the best of my knowledge and belief, true, accurate and complete."
And
Ccertify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the terms and conditions of the stormwater discharge
permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign. (accordhw to permit signatory requirements) and return this CerEification. DO NOT
SEND-STIORMWATER POLLUTION PREVENTION PLAN WITH THIS' CERTIFICATION.
Signature Qwn_ .- W c,.,A .t �.� � Date
L
Print or type name of person signing above Title
L
tsf�
�' ' SPPP C,erUfkation 5/09

STORMWAZTR PQILUTION PN7nON PLAl+T
I DE'(�ELOPNN��NT' AND Il�iPLEMENi'ATION, ,
CER1�.+�CATION
North Carolina Division of Water Quality - Stormwater Permitting Unit
Facility flame: A1rgas Specia€ity Gases
Permit Number: NC5000046
Location Address. 630 United Dr
Durham, NORTH CAROLINA 27713
County: Durham
"1 certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments were
developed and implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel property. gather and evaluate the information required by the SPPP. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information
gathered is, to the best of my knowledge and belief, true, accurate and complete."
And
r certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the terms and conditions of the stormwater discharge
permit."
And
"i am aware that there are significant penalties for falsifying. information, including the possibility of fines and
imprisonment for knowing violations."
Sign (acearding:to perinit. signaOry requirements) aad return this Certifieaiaion. DO NOT
SEND -STORMWATER POLLU'IZON PREVENTION_ PLAN WTl`H THIS 'CERT. MCATION
Signature {� Date _ Q • 3 - ���
W LW rho Q
Print or type name of person signing above Title
SPPP Cerlmfication 5109

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Gole'en' H. Sullins ' Dee Freeman
Govemor Director Secretary
November 16, 2009
Mr. Charlie Winston
Airgas Specialty Gases
630 United Drive
Durham, North Carolina 27713
Subject- Draft NPDPS Stormwater Permit
Permit No. NCS000046
ASG Durham
Durham County
Dear Mr. Winston:_'.
Enclosed with this letter is a copy of the draft stormwater permit for your facility. Please review the draft
very carefully to ensure thorough understanding of the conditions and requirements it contains.
The draft permit contains the following significant changes from this facility's current permit:
Analytical monitoring changes:
1. Analytical monitoring parameters have been added to this permit based on the classification and
impairment of the stream discharged to. Nitrogen and Phosphorus have been carried over from the last
permit term. Total Suspended Solids and Chemical Oxygen Demand have been added.
2. pH has been added to -the analytical monitoring requirements based on DWQ's current monitoring
stragtegy. .
3. All analytical monitoring has been set to semi-annually during a representative storm event as defined in
Part 11 Section B. The perm ittee must also document the total precipitation for each event If no discharge
occurs during the sampling period, the permittee must submit a monitoring report indicating "No Flow'
within 30 days of the end of the six-month sampling period. Additionally, samples must be taken a
minimum of.60 days apart, as specified in Table 2.
4. Benchmarks for apalytical monitoring have been added to this draft permit. Exceedances of benchmark
values require the permittee to increase monitoring, increase management actions; increase record
keeping, and/ or install stormwater Best Management Practices (BMPs) in a tiered program. If the
sampling results are above a benchmark value, or outside of the benchmark range, for any parameter at
any outfaII then the facility shall follow the Tier 1 guidelines which require a facility inspection within
two weeks and implementation of a mitigation plan within two months. If during the term of this permit,
the sampling results are above .the benchmark values, or outside of the benchmark range, for any specific
parameter at a specific discharge outfall two times in a row (consecutive), then the facility shall follow the
Tier 2 guidelines which require a repetition of the steps listed for Tier 1 and also immediately institute
monthly monitoring for all parameters at every outfall where a sampling result exceeded the benchmark
value for two consecutive samples.
5. You are required to collect all of the analytical and qualitative monitoring samples during representative
storm events as defined in Part II Section B. Qualitative monitoring is.required regardless of
representative outfaII status.
Wetlands and Stormwater Branch � Ile
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 NOT'tf1CaI'Qllna
Location: 512
9-8 N. Salisbury 5t Raleigh, North Carolina r Service:
y �a� �� rr�
Phone: 919�07�3001 FAX 919�07�4941 Customer 5ervice:1-877-623-fi74$ ��/ "
Internet www.ncwaterquafity.org
An Equal Opportunity 1 Affirmative Action Employer

Mr. Charlie Winston
Airgas Specialty Gases
Permit No. NCS000046
b. You are responsible for all monitoring until the renewal permit is issued. See Footnote 1 of Tables 1, 4,
and 5. .
7. The.flow.reporting requirement has been removed per DWQ revised strategy. (The total rainfall
parameter is in this permit, however.)
8. Vehicle maintenance monitoring has been revised to semi-annually in order to coincide with analytical
and qualitative monitoring. Monitoring for TPH has replace Oil & Grease. This requirement appears in
all Individual Stormwater permits, however it only applies to facilities that do vehicle maintenance. If the
facility begins vehicle maintenance during "the permitted timeframe then the requirements shall apply.
Other permit changes:
1. Additional. guidance is provided about the Site Plan requirements. The site map must now identify if the
receiving stream is impaired and if it has a TMDL established. It must also describe potential pollutants
in each outfall. The map requirements are stated more explicitly. - And, the site plan must contain a list of
significant spills that have occurred in the past three years and also must certify that the outfalls have
been inspected to ensure that they do not contain non-stormwater discharges. Additional information is
provided M' Part II Section A.
2. Additional requirements for the Stormwater-Management PIan have been specified in Part II Section A.
More details regarding secondary containment are provided.
3. -Additional requirements for the Stormwater Pollution Prevention Plan have been specified in Part II
Section A. The plan must also be updated annually to include a list of significant spills and to certify that
the outfalls do not contain non-stormwater discharges.
4. The facility must now implement a semi-annual Facility Inspection Program of the sites stormwater
management controls as specified in Part 11 Section A.
5. Information regarding the No Exposure Exclusion has been added to this draft permit. If industrial
materials and activities are not exposed to precipitation or runoff as described in 40 CFR §122.26(g), the
facility may qualify for a No Exposure Exclusion from NPDES stormwater discharge permit
requirements. Additional information is provided in Part I Section A.
6. In addition to submitting two signed copies of DMRs to Central Files, a separate signed Annual Summary
DMR copy must be submitted to the Iocal DWQ Regional Office by March 1 of each year.
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.
If you have any questions or comments concerning this draft permit contact me at [phone] or
robert.patterson®ncdenr.gov
Sincerely,
9
Robert D. Patterson, PE
Environmental Engineer
Stormwater Permitting Unit
cc: Mr. Ken Jones, Environmental Services Group, 904 Garland St., Little Rock, AR 72201
Raleigh Regional Office, Mack Wiggins
Stormwater Permitting Unit
Attachments
2

NCS000046
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE STORMWATER UNDER THE
In compliance with the provisions of North Carolina. General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted Eby the.North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
AirgasSpec ial�ty Gases
is hereby authorized to,discbarge stormwater from a facility located at
OSG Durham
630 United Drive
Durham, NC _
Durbam County
to receiving waters designated as a UT of Northeast Creek, a class C; NSW stream in the Cape .
Fear River Basin, in accordance with the discharge limitations, monitoring requirements, and
other conditions set forth in Parts I, 11, III, IV, V and VI hereof.
Note: Draft Permit Dates are Approximate
This permit shall become effective February 1, 2010.
This permit and the authorization to discharge shall expire at midnight on January 31, 2015.
Signed this 8a' day of January, 2010.
for Coleen H_ Sullins Director
Division. of Water Quality
By the Authority of the Environmental Management Commission

Permit No. NCS000046
PART I
Section A:
TABLE OF CONTENTS
INTRODUCTION
Individual Permit Coverage
Section B: Permitted Activities
Section C: Location Map
f-
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
Section A: Stormwater Pollution Prevention Plan
Section B: Analytical Monitoring Requirements..
Section C: Qualitative Monitoring Requirements
Section D: On -Site Vehicl -Maine ance.Monitoring Requirements
17
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDWIDUAL
PERMITS —
Section A: Compliance and Liability
1. Compliance Schedule
2. . Duty to Comply
3. Duty to Mitigate
4. Civil and Criminal Liability
5. Oil and Hazardous Substance Liability
6. Property Rights
7. Severability
8. Duty to Provide Information
9. Penalties for Tampering
10. Penalties for Falsification of Reports
Section B: General Conditions
1. Individual Permit Expiration
2. Transfers
3. Signatory Requirements
i

Permit No. NCS000046
Section C
Section D`:
Section E:
4. Individual Permit Modification, Revocation and Reissuance, or
Termination
5. Permit Actions
Operation and Maintenance of Pollution Controls
1. Proper Operation and Maintenance
2. Need to Halt or Reduce Not,a Defense
`j
3. Bypassing of Stormwater Control Facilities
Monitoring and Records
1. Representative Sampling
2. Recording Results
3. Flow. Measurements
4. Test Procedures
5. Representative O tf ll
6. Records Retention
7. Insnectiorn4and-Entry
Reporting Requirements. "
1.
Discharge Monitoring Reports
2.
Subrnitti g:Reports -
3.
Availability of Reports
4.
Non-Stormwater Discharges
5.
Planned Changes
6.
Anticipated Noncompliance
7.
Spills
8.
Bypass
9.
Twenty-four Hour Reporting
10.
Other Noncompliance
11.
Other Information
PART IV LIMITATIONS REOPENER
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS
PART VI DEFINITIONS
ii

Permit No. NCS000046
PART I INTRODUCTION
SECTION A: INDIVIDUAL PERMIT COVERAGE
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge stormwater associated with industrial activity_. Such
discharges shall be controlled, limited and monitored as specified in this permit:
If industrial materials and activities are not exposed to precipitation or runoff as described in 40
CFR § 122.26(g), the facility may qualify for a No Exposure Exclusion from NPDES stormwater
discharge permit requirements. Any owner or operator wishing:to obtain a No Exposure
Certification must submit a No Exposure Certification'N&torm to the,Division; must receive
approval by the Division; must maintain no exposure conditions unless authorized to discharge
under a valid NPDES stormwater permit; and must reapply for the'No Exposure Exclusion once
every five (5) years.' .;
SECTION & PERMITTED ACTIVITIES
Until this permit expires or is modified"or revoked, the.permittee is authorized to discharge
stormwater to the surface waters of NoA Carolina or separate storm sewer system that has been
adequately treated and managed in accordance with the terms and conditions of this individual
permit. All stormwater discharges shall.be'in accordance with the conditions of this permit.
Any other point source discharge tosurface waters of the state is prohibited unless it is an
allowable non-stormwater discharge or is covered by another permit, authorization,, -or approval.
The stormwater discharges allowed by this 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. NCS000046
T.
'-fs �3 � •.5z1.� v f �ky r ` � ` I r• F tv;
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NCS000046
N
I 5 -
Airgas Specialty Gases
ASG Dttrliam
Latitude: 350 56' 06" N
Longitude: 780 54' 00" W
Count,•: Durham
Receivina Strwm: UT of Northeast Creek
Stream Gass: C, NSW
Sub -basin: 03-06-05 (Capp Fear River Basin)
ttrfrsi���,•��`
Facility Location
Part I Page 2 of 2

Permit No. NCS000046
PART II MONITORING, CONTROLS, AND LIMITATIONS FOR
PERMITTED DISCHARGES
SECTION A: STORMWATER POLLUTION PREVENTION PLAN
The Permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to.as
the Plan. This Plan shall be considered public information in accordance with Part III, Standard
Conditions, Section E, Paragraph 3 of this individual permit. The Plan shall include, at a
minimum, the following items:
1. 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:
(a) A general location map (USGS quadrangle -map or appropriately drafted
equivalent map), showing the facility's location in relation to transportation routes
and surface waters, the name of thereceiving.water(s) to which the stormwater
outfall(s) discharges, or if the discharge is`to' a municipal separate storm sewer
system, the name of the municipality and the ultimate receiving waters, and
accurate latitude and longitude of the point(s) of discharge. The general location
map (or alternatively the site map) -shall identify whether each receiving water is
impaired (on the s ate's. 303(d) -list of impaired waters) or is located in a
watershed for which a TMDL has been established, and what the parameter(s)
of concern are: fl
(b) A narrative d6criptid 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.
(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 Ill, Standard Conditions, Section
Part II Page 1 of 10

Permit No. NCS000046
B, Paragraph S. 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 technical and economic feasibility of changing
the methods of operations and/or storage practices to eliminate or.reduce exposure
of materials and processes to stormwater. Wherever practical, the permittee shall
prevent exposure of all storage areas, material3handling operations, and
manufacturing or fueling operations. In"aareas, where elimination of exposure is
not practical, the stormwater management.plan shall,document the feasibility of
diverting the stormwater runoff away from,areas of otential contamination.
(b) Secondary Containment Requirerneri_ s and'Records. Secondary containment is
required for: bulk storage of liquid materials; storage in any amount of Section
313 of Title III of the Superfun'd Ari endm�ents and Reauthorization Act {SARA)
water priority chemicals; and storage.in any amount of hazardous substances, in
order to prevent leaks and spills frorn contaminating stormwater. runoff. A table
or summary of all''cli�tanks and stored materials_ and their associated secondary
containment areas,shall'be,maintained. If the secondary containment devices are
connected to stormwater conveyance systems, the connection shall be controlled
by manually activated valves or other similar devices (which shall be secured
closed with dlocking;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 any material. Records documenting the individual making the
observation, the description of the accumulated stormwater, and the date and time
of the release shall be kept for a period of five 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.
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
Part II Page 2 of 10

'Permit No. NCS000046
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 Housekeeping Program. A preventative
maintenance and good housekeeping program shall be developed. The program shall list
all stormwater control systems, stormwater discharge outfalls, all on -site and adjacent
surface waters and wetlands, industrial activity areas (including material storage areas, r
material handling areas, disposal areas, process areas; loading and unloading areas, and
haul roads), all drainage features and structures;and existing structural BMPs. The
program shall establish schedules of inspections, maintenance; and housekeeping
activities of stormwater control systems, as well as facility equipment, facility areas, and
facility systems that present a potential for stormwater exposure or stormwater pollution.
Inspection of material handling areas and regular cleaning schedules of these areas shall
be incorporated into the program. Timely compliance with the established schedules for
inspections, maintenance, and housekeeping shall be recorded in writing and maintained
in the SPFP.
5. Employee Training. Training pogr%ams. 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.tlie 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 written re -certification that the stormwater outfalls have been
evaluated for the presence of non-stormwater discharges. Each annual update shall
include a documented re-evaluation of the 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
Part II Page 3 of 10

Permit No. NCS000046
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.
S. Facility Inspections. Inspections of the facility and all stormwater systems shall occur as
part of the Preventative Maintenance and Good Housekeeping Program at a minimum on
a semi-annual schedule, once during the first half of the year (January to June), and once.
during the second half (July to December), with at least 60 days separating inspection
dates (unless performed more frequently than semi-annually). These facility inspections _
are different from, and in addition to, the stormwater discharge characteristic monitoring
-required in Part II B and C of this permit.
9. Implementation. The permittee shall implement A, Planimplementation of the Plan
shall -'include documentation of all momtoring ,measu ements;4inspections, maintenance
activities, and training provided to employees, including the log of the sampling data and
of actions taken to implement BMPs associated'withAhe industrial activities, including
vehicle maintenance activities.. Such documentation shall be kept on -site for a period of
five years and made available to the Direc o ,br the'Director's authorized representative
immediately upon request.
Part II Page 4 of 10

Permit No. NCS000046
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 0.1 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 begins within 10 hours.
Table 1. Analytical Monitoring Requirements/
Discharge
Measurement Frequencyl_
Sample
Sample
Characteristics
Units
Type2
Location3
Total Suspended Solids, TSS
myZL
semi-annual
Grab
SDO
Chemical Oxygen_ Demand,
!- t \`:��
Grab
SDO
COD
mg/L
semi-annual
Nitrogen, Total
.mg/L.,
' ; semi-annual
Grab
SDO
Phosphorus, Total
.;rri L .•
semi-annual
Grab
SDO
H
standard,
semi-annual
Grab
SDO
Total Rainfall4 ,�'
r inches`
semi-annual
Rain Gauge
-
Footnotes: f s � 7
I Measurement Frequency: Twice per year during a representative storm event.
2 Grab samples 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 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.
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 Period 1 and
Period 2 sample dates unless monthly monitoring has been instituted under a Tier Two
response.
Part II Page 5 of 10

Permit No. NCS000046
Table 2. Monitorinp- Schedule
Monitoring period.'.,.
Sample Number'
Start"-..-
End '
Year 1 — Period 1
1
February 1, 2010
July 31, 2010
Year 1 — Period 2
2
August 1, 2010
January 31, 2011
Year 2 — Period 1
3
February 1, 2011
July 31, 2011
Year 2 — Period 2
4
August 1, 2011
January 31, 2012
Year 3 — Period 1
5
February 1, 2012
July 31, 2012
Year 3 — Period 2
6
August 1, 2012
January 31, 2013
Year 4 -- Period 1
7
February 1, 2013
July 31, 2013
Year 4 — Period 2
8
August 1, 2013
January 31, 2014
Year 5 — Period 1
9
February 1, 2014
July 31, 2014
Year 5 — Period 2
10
August 1 2014
January 31, 2015
Footnotes:
I - Maintain semi-annual monitoring during permit renewal l
Permit, the permittee has submitted an application for r n
the permittee will be considered for renewed coverageT
monitoring until the renewed Certificate of CoverageAs u;
2 If no discharge occurs during the sampling period, the'pei
"No Flow" within 30 days of the end of the six month sal
ft;tlie expiration of the Individual
coverage before the submittal deadline,
ie ant must continue semi-annual
must submit a monitoring report indicating
period.
The permittee shall report the analytical results from the first sample -with valid results within the
monitoring period. The permittee,shall compare monitoring results to the benchmark values in
Table 3. The benchmark value is n Table 3 are not permit limits but should be used as guidelines for
the permittee's Stormwater Pollution Prevention Plan (SPPP). Exceedences 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.
Table 3. Benchmark Values for Analvtical Monitorine
Discharge 'Chairacteristics _
= 'Units
Benchmark
Total Suspended Solids, TSS
mg/L
100
Chemical Oxygen Demand,
COD
mg/L
120
Nitrogen, Total
mg/L
30
Phosphorus, Total
mg/L
2
pH
standard
6-9
Part 11 Page 6 of 10

Permit No. NCS000046
Tier One
If: The first valid sampling results are above a benchmark value, or outside of the benchmark range, for any
parameter at any outfall;
Then: The permittee shall:
1. Conduct a stormwater management inspection of the facility within two weeks of receiving
sampling results.
2. Identify and evaluate possible causes of the benchmark value exceedence.
3. Identify potential and select the specific: source controls, operational controls, or physical
improvements to reduce concentrations of the parameters of concern, or to bring concentrations
within the benchmark range.
4. Implement the selected actions within two months of the inspection.
m 5. Record each instance of a Tier One response in the Storwater.Pollution Prevention Plan. Include
the date and value of the benchmark exceedence, the inspection date, the personnel conducting the
inspection, the selected actions, and the date the selected.actions were implemented.
Tier Two
If: During the term of this permit, the first valid sampling results from two consecutive monitoring periods
are above the benchmark values, or outside of.the benchmark range, for any specific parameter at a
specific dischar e outfall;
Then: The permittee shall: ~
1. Repeat all the required actions utlined,al?ove in Tier One.
2. Immediately institute morithly monito ng for all parameters at every outfall where a sampling result
exceeded the benchmark:Value fortwo consecutive samples. Monthly (analytical and qualitative)
monitoring shall continue,until three consecutive sample results are below the benchmark values or
within the benchmark range.
3. If no discharge occurs during the sampling period, the permittee is required to submit a monthly
monitoring report indicating "No Flow" to comply with reporting requirements.
4. Maintain a record of the Tier Two response in the Stormwater Pollution Prevention Plan.
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 Regional Office Supervisor in writing within
30 days of receipt of the fourth analytical results. DWQ may but is not limited to:
• require that the permittee revise, increase, or decrease the monitoring frequency for the remainder
of the permit;
• require the permittee to install structural stormwater controls;
• require the permittee to implement other stormwater control measures; or
• require that the permittee implement site modifications to qualify for the No Exposure Exclusion.
Part II Page 7 of 10

Permit No. NCS000046
This site discharges to impaired waters experiencing problems with turbidity and low dissolved
oxygen. There is currently a TMDL for fecal coliform in Northeast Creek. If another Total
Maximum Daily Load (TMDL) is approved for this segment of Northeast Creek, the permittee
may be required to monitor for the pollutant(s) of concern in the future and submit results to the
Division of Water Quality. The Division will consider the monitoring results in determining
whether additional BMPs are needed to control the pollutant(s) of concern to the maximum
extent practicable.
If additional BMPs are needed to achieve the required level of control, the permittee will be
required to (1) develop a strategy for implementing appropriate BMPs, and (2) submit a timetable
for incorporation of those BMPs into the permitted-Stormwater Pollution Prevention Plan.
SECTION C: QUALITATIVE MONITORING REQUIREMENTS
Qualitative monitoring requires a visual inspection of� ach stormwa"ter outfall regardless of
representative outfall status and shall be performed as sp&ified in Table 4, during the -analytical
monitoring event. [If analytical monitoring is not quired the permittee still must conduct semi-
annual qualitative monitoring.] Qualitative monitoring istfor 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 oted�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 belibatotained with the SPPP.
Table 4. Qualitative Monitoring Requirements
Discharge, Characteristics .
Frequencyl '
Monitoring
Loeation2
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
SDO
Erosion or deposition at the outfall
semi-annual
SDO
Other obvious indicators
of stormwater pollution
semi-annual
SDO
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 permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the
N
Part II Page 8 of 10

Permit No. NCS000046
permittee 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, Monitoring Location: Qualitative monitoring shall be performed at each stormwater discharge outfall (SDO)
regardless of representative outfall status.
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 �.
Table 5.. Analytical Monitoring Requirements foir On -Site Vehicle Maintenance
Discharge Characteristics
Units
Measurement
Sample
Sample
Free uenc l
Type2
Location3
PH
standard _
/.semi-annual
Grab
SDO
TPH
mg/1r''
semi-annual
Grab
SDO
[EPA Method 1664 (SGT-HEM)
Total Suspended Solids
`mg/1 �, /
semi-annual
Grab
SDO
Total Rainfal l4
%" inches
semi-annual
Rain auge
New Motor Oil Usage
_ i,gallon%month
semi-annual
Estimate
-
Footnotes:
1 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 permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the
permittee 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 from the pond.
3 Sample "Location: Samples shall be collected at each stormwater discharge outfall (SDO) that discharges
stormwater runoff from area(s) where vehicle maintenance activities occur.
4 For each sampled representative storm event the total precipitation must be recorded. An on -site or local rain
gauge reading must be recorded.
Part II Page 9 of 10

Permit No. NCS000046
Monitoring results shall be compared to the benchmark values in Table 6. The benchmark
values in Table 6 are not permit limits but should be used as guidelines for the permittee's
Stonmwater Pollution Prevention Plan (SPPP). Exceedences of benchmark values require the
permittee to increase monitoring, increase management actions, increase record keeping, and/or
install stormwater Best Management Practices (BMPs), as provided in Part I1 Section B.
Table 6. Benchmark Values for Vehicle Mainten_ ance Analytical Monitoring
Discharge Characteristics Units.- Benchmark
pH standard -6-9
Y•
TPH mg/L I`5
[EPA Method 1664 (SGT-HEM)] A
Total Susnended Solids mg/L
Part I1 Page 10 of 10

Permit No. NCS000046
PART III STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS
SECTION A: COMPLIANCE AND LIABILITY
Compliance Schedule
The permittee shall comply with Limitations and Controls specified for stormwater discharges in
accordance with the following schedule:
Existing Facilities already operating but applying for permit coverage for the first time: The Stormwater
Pollution Prevention Plan shall be developed and implemented within 12 months of the effective date of the
initial permit and,updated thereafter on an annual basis. Secondary containment, as specified in Part-li,
Section A, Paragraph 2(b) of this permit, shall be accomplished within,12 months of the effective date of
the initial permit issuance. !% �.�
New Facilities applying for coverage for the first time and existing facilitiespreviously permitted and
applying for renewal under this permit: The Stormwater Pollution Prevention Plan shall be developed and
implemented prior to the beginning of discharges from the,operation of the industrial activity and be
updated thereafter on an annual basis. Secondary containment, as specified in Part II, Section A, Paragraph
2(b) of this pen -nit shall be accomplished prior to -the beginning of discharges from the operation of the
industrial activity.
2. Duty to Comply / /f ,� X °
The permittee must comply with all conditions of this individual permit. Any permit noncompliance
constitutes a violation of the Cleah Water Act:and is grounds for enforcement action; for permit
termination, revocation and reissu ce, or modification; or denial of a permit upon renewal application.
a. The permittee shall comply,with standards or prohibitions established under section 307(a) of the
Clean Water Act fcrtoxi6 pollutants within the time provided in the regulations that establish these
standards or prohibitions, even if the permit has not yet been modified to incorporate the
requirement.
b. The Clean Water Act provides that any person who violates a permit condition is subject to a civil
penalty not to exceed $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 1 year, or both. Any person who knowingly violates permit
conditions is subject to criminal penalties of $5,000 to $50,000 per day of violation, or
imprisonment for not more than 3 years, or both. Also, any person who violates a permit condition
may be assessed an administrative penalty not to exceed $10,000 per violation with the maximum
amount not to exceed $I25,000. [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].
d. Any person may be assessed an administrative penalty by the Director for violating section 301,
302, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any
of such sections in a permit issued under section 402 of the Act. Administrative penalties for Class
I violations are not to exceed $10,000 per violation, with the maximum amount of any Class I
penalty assessed not to exceed $25,000. Penalties for Class 11 violations are not to exceed
Part III Page 1 of 8

Permit No. NCS000046
$10,000 per day for each day during which the violation continues, with the maximum amount of
any Class 1I penalty not to exceed $125,000.
3. Duty to Mitigate
The permittee shall take all reasonable steps to minimize or prevent any discharge in violation of this
individual permit which has a reasonable likelihood of adversely affecting human health or the environment.
4. Civil and Criminal Liability
,t
Except as provided in Part II[, Section C of this permit regarding bypassing of stormwater control facilities,
nothing in this individual permit shall be construed to relieve the permittee fron) any responsibilities,
liabilities, or penalties for noncompliance pursuant to NCGS 143-215.3, 143-2151-6A, 143-215.613, 143-
215.6C or Section 309 of the Federal Act, 33 USC 1319. Furthermore, the permittee is responsible for
consequential damages, such as fish kills, even though the responsibility for effective compliance may be
temporarily suspended.
5. Oil and Hazardous Substance Liability
Nothing in this individual permit shall be construed to preclude the institution of any legal action or relieve r-
z'• .:N �y✓
the permittee from any responsibilities, liabilities; dr penalties to which the permittee is or may be subject to
under NCGS 143-215.75 et seq. or Section 311 of the'Fdde�l-/Act, 33 USC 1321.
6. Property Rights
The issuance of this individual`permit doe -not convey any property rights in either real or personal
property, or any exclusive privileges,' nor does it authorize any injury to private property or any invasion of
personal rights, nor any infringementn of Federal, State or local laws or regulations.
7. Severability
The provisions of this individual permit are severable, and if any provision of this individual permit, or the
application of any provision of this individual permit to any circumstances, is held invalid, the application
of such provision to other circumstances, and the remainder of this individual permit, shall not be affected
thereby.
8. Duty to Provide Information
The permittee shall furnish to the Director, within a reasonable time, any information which the Director
may request to determine whether cause exists for modifying, revoking and reissuing, or terminating the
permit issued pursuant to this individual permit or to determine compliance with this individual permit. The
permittee shall also fumish 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. NCS000046
10. Penalties for Falsification of Reports
The Clean Water Act provides that any person who knowingly makes any false statement, representation, or
certification in any record or other document submitted or required to be maintained under this individual
permit, including monitoring reports or reports of compliance or noncompliance -shall, upon conviction, be
punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than two years
per violation, or by both.
SECTION B: GENERAL CONDITIONS
.1
1. Individual Permit Expiration
The permittee is not authorized to discharge after the expiration date.An order to receive automatic
authorization to discharge beyond the expiration date, the permiaee,shall submit forms and fees as are
required by the agency authorized to issue permits no later-than180'days prior to the expiration date. Any
pennittee that has not requested renewal at least 180 days prior' to'exptration, or any permittee that does not
have a permit after the expiration and has not requested renewal at least-180 days prior to expiration, will be
subjected to enforcement procedures as provided in NCGS § 1'43-2153.6 and 33 USC 1251 et. seq.
J
2. Transfers X � . �
This permit is not transferable to any person ezcept'after notice to and approval by the Director. The
Director may require modification or revocation and reissuance of the permit to change the name and
incorporate such other requirements as"may.be necessary under the Clean Water Act. The Pernuttee is
required to notify the Division in `vri'ting in the event the permitted facility is sold or closed.
3. Signatory Requirements
tv
All applications, reports, onmformatton submitted to the Director shall be signed and certified.
a. All applications to,be•co ered 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. Al] 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. NCS000046
responsibility, or an individual or position having overall responsibility for environmental
matters for the company. (A duly authorized representative may thus be either a named
individual or any individual occupying a named position.); and
(3) The written authorization is submitted to the Director.
C. Any person signing a document under paragraphs a. or b. of this section shall make the following
certification:
"I certify, under penalty of law, that this document and all attachments were prepared under my'
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and -evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for•knowinng violations."
4. Individual Permit Modification, Revocation and Reissuanc e, or Termination
The issuance of this individual permit does not prohibit.the Director from reopening and modifying the
individual permit, revoking and reissuing the individual permit; or terminating the individual permit as
allowed by the laws, rules, and regulations containedn Title 40, Code of Federal Regulations, Parts 122
and 123; Title 15A of the North Carolina Administrative Code, Subchapter 2H A 100; and North Carolina
General Statute 143-215.1 et al.
5. Permit Actions
Y
The permit may be modifies
changes or anticipated non
SECTION C: OPERATION AND
Proper Operation and Maintenance
:issued, or terminated for cause. The notification of planned
not stay any individual permit condition. —
ANCE 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 operation and maintenance also includes adequate
laboratory controls and appropriate quality assurance procedures. This provision requires the operation of
back-up or auxiliary facilities or similar systems which are installed by a permittee only when the operation
is necessary to achieve compliance with the conditions of this individual permit.
2. Need to Halt or Reduce Not a Defense
It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the condition of this individual permit.
3. Bypassing of Stormwater Control Facilities
Bypass is prohibited and the Director may take enforcement action against a permittee for bypass unless:
a. Bypass was unavoidable to prevent loss of life, personal injury or severe property damage; and
Part III Page 4 of 8

Permit No. NCS000046
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
1. Representative Samplint,,
Samples collected and measurements taken, as required hereinshall be -characteristic of the volume and
nature of the permitted discharge. Analytical sampling' shall be performed during a representative storm
event. Samples shall be taken on a day and time that ischaracteristic of the discharge. All samples shall be
taken before the discharge joins or is diluted by any other waste `stream, body of water, or substance.
Monitoring points as specified in this permit shall not, be changed without notification to and approval of
the Director.
2. Recording Results
For each measurement, sample; inspection or maintenance activity performed or collected pursuant to the
requirements of this individual peipit, the perifiatee shall record the following information:
a. The date, exact p/la e, and tithe of sampling, measurements, inspection or maintenance activity;
b. The individual(s) who performed the sampling, measurements, inspection or maintenance activity;
C. The date(s) analyses were performed;
d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.
3. Flow Measurements
Where required, appropriate flow measurement devices and methods consistent with accepted scientific
practices shall be selected and used to ensure the accuracy and reliability of measurements of the volume of
monitored discharges.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to the EMC regulations published pursuant to
NCGS 143-215.63 et. seq, the Water and Air Quality Reporting Acts, and to regulations published pursuant
to Section 304(g), 33 USC 1314, of the Federal Water Pollution Control Act, as Amended, and Regulation
40 CFR 136.
Part III Page 5 of 8

Permit No. NCS000046
To meet the intent of the monitoring required by this individual permit, all test procedures must produce
minimum detection and reporting levels and all data generated must be reported down to the minimum
detection or lower reporting level of the procedure.
5. Representative Outfall
If a facility has multiple discharge locations with substantially identical stormwater discharges that are
required to be sampled, the permittee may petition the Director for representative outfall status. If it is
` established that the stormwater discharges are substantially identical and the permittee is granted
representative outfall status, then sampling requirements may be performed at a reduced number of outfalls.
6. Records Retention
Visual monitoring shall be documented and records maintained at thefacilityalong with the Stormwater
Pollution Prevention Plan. Copies of analytical monitoring results.shall also be maintained on -site. The
permittee shall retain records of all monitoring information in6luiiu3g all calibration and maintenance
records and all original strip chart recordings for continuous-monitoiing,instrrumentation, and copies of all
reports required by this individual permit for a period of arleast 5 years -from the date of the sample,
measurement, report or application. This period may be extended by request of the Director at any time.
Inspection and Entry f.-)
The permittee shall allow the Director, or an authorized representative (including an authorized contractor
acting as a representative of the Director),,or in che.cafse of a facility which discharges through a municipal
separate storm sewer system, an authorize&representative of a municipal operator or the separate storm
sewer system receiving the discharge, pon_ the, presentation of credentials and other documents as may be ,
required by law, to-
m
a. Enter upon the perittee's premises where a regulated facility or activity is located or conducted, or where records must be kept under the conditions of this individual permit,
b. Have access to and copy, at reasonable times, any records that must be kept under the conditions of .
this individual permit; JU
C. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment),
practices, or operations regulated or required under this individual permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring individual permit compliance
or as otherwise authorized by the Clean Water Act, any substances or parameters at any location.
SECTION E: REPORTING REQUIREMENTS
1. Discharge Monitoring Reports
Samples analyzed in accordance with the terms of this permit shall be submitted to the Division on
Discharge Monitoring Report forms provided by the Director. Submittals shall be delivered to the Division
no later than 30 days from the date the facility receives the sampling results from the laboratory.
The permittee shall submit an Annual Summary Data Monitoring Report to the appropriate DWQ Regional
Office in February of each year. The submittal shall be on forms supplied by the Division.
Part III Page 6 of 8

Permit No. NCS000046
When no discharge has occurred from the facility during the report period, the permittee is required to
submit a discharge monitoring report, within 30 days of the end of the six-month sampling period, giving all
required information and indicating "NO FLOW" as per NCAC TI5A 02B .0506.
The permittee shall record the required qualitative monitoring observations on the SDO Qualitative
Monitoring Report form provided by the Division, and shall retain the completed forms on site. Visual
monitoring results should not be submitted to the Division, except upon DWQ's specific requirement to do
SO.
Submitting Reports
Two signed copies of Discharge Monitoring Reports (DMRs) shall be submitted.to:
Central Files
Division of Water Quality %
1617 Mail Service Center�\
jr
Raleigh, North Carolina'27 99-" 617�f
In addition, a separate signed Annual Summary DMR 6py`shall be submitted to the local DWQ. Regional
Office (RO) by March I .of each year.
Addresses for each RO and the counties covered by each RO can be found here:
http://,*"r,►v.enr.state.ne.us/htmUregionalofrces.htm].�The permittee shall retain the completed originals
on site. Visual monitoring results should not be;submitied to the Regional Offices or Central Files unless
specifically requested by DWQ_ <N t '
Availability of Reports
Except for data determined to be confide t al under NCGS 143-21-5.3(a)(2) or Section 308 of the Federal
Act, 33 USC 1318, all reports prepared in accordance with the terms shall be available for public inspection
at the offices of the Division f Water Quality. As required by the Act, analytical data shall not be
considered confidential. Knowingly making any false statement on any such report may result in the
imposition of criminal penalties as provided for in NCGS 143-215.6E or in Section 309 of the Federal Act.
4. Non-Stormwater Discharge
If the storm event monitored in accordance with this Individual Permit coincides with a non-stormwater
discharge, the permittee shall separately monitor all parameters as required under the non-stormwater
discharge permit and provide this information with the stormwater discharge monitoring report.
5. Planned Changes
The permittee shall give notice to the Director as soon as possible of any planned changes at the permitted
facility which could significantly alter the nature or quantity of pollutants discharged. 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).
6. Anticipated Noncompliance
The permittee shall give.notice to the Director as soon as possible of any planned changes at the permitted
facility which may result in noncompliance with the Individual Permit requirements.
Part III Page 7 of 8

Permit No. NCS000046
7
8.
10.
Snills
The permittee shall report to the local DWQ Regional Office, within 24 hours, all significant spills as
defined in Part VI of this permit. Additionally, the permittee shall report spills including: any oil spill of 25
gallons or more, any spill regardless of amount that causes a sheen on surface waters, any oil spill
regardless of amount occurring within 100 feet of surface waters, and any oil spill less than 25 gallons that
cannot be cleaned up within 24 hours.
.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.
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 shaIl be provided orally within 24 hours from
the time the permittee became aware of the circumst c sr AY. submission shall also be provided
17 lip, - N-Y.
within 5 days of the time the permittee becomes'aware of the.circumstances.
The written submission shall contain a descriptionaofthe noncompliance, and its causes; the period of
noncompliance, including exaci dates anmeA�a dJtri'if the noncompliance has not been corrected, the
anticipated time compliance is expected to continue; and steps taken or planned to reduce, eliminate, and
prevent reoccurrence of the noncomplrance\..,��
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 noncompliance not reported under 24 hour reporting at the time
monitoring reports are submitted.
Other Information
Where the permittee becomes aware that -it failed to submit any relevant facts in a Notice of Intent to be
covered under this Individual Permit or in any report to the Director, it shall promptly submit such facts or
information.
Part III Page 8 of 8

NCS000046
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:
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 paragrapli:shall alZ\contain,any-6ther requirements in the
Act then applicable.
PART V ADMINISTERING AND COMPLIANCE MONITORING FEE
The permittee must pay the administering and compliant
the Division. Failure to pay the fee in,timely manner in i
Division to initiate action to revoke the.lndividual Permi
- • . \ `ram
PART,VI
1. Act
See Clean Water Act.
ig fee within 30 (thirty) days after being billed by
with 15A NCAC 2H .0105(b)(4) may cause this
DEFINITIONS
2. Allowable Non-Stormwater Discharges
This permit regulates stormwater discharges. Non-stormwater discharges which shall be allowed in the
stormwater conveyance system are:
(a) All other discharges that are authorized by a non-stormwater NPDES permit.
(b) Uncontaminated groundwater, foundation drains, air -conditioner condensate without added
chemicals, springs, discharges of uncontaminated potable water, waterline and fire hydrant
flushings, water from footing drains, flows from riparian habitats and wetlands.
(c) Discharges resulting from fire -fighting or fire -fighting training.
3. 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. More information on BMPs can be found at:
bttp://cfpub.epa.gov/npdes/stormwater/menuofbmps/index.cfrn.
4. 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.
5. Bulk Storage of Liquid Products
Liquid raw materials, manufactured products, waste materials or by-products with a single above ground
storage container having a capacity of greater than 660 gallons or with multiple above ground storage
containers located in close proximity to each other having a total combined storage capacity of greater than
1,320 gallons.
Parts IV, V and VI Page 1 of 4

Permit No. NCS000046
6. Certificate of Coverage
The Certificate of Coverage (COC) is the cover sheet which accompanies the Individual Permit upon
issuance and lists the facility name, location, receiving stream, river basin, effective date of coverage under
the permit and is signed by the Director.
7. Clean Water Act
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC
1251, et. seq.
8. Division or DWO
The Division of Water Quality, Department of Environment and Natural Resources.
9. Director
The Director of the Division of Water Quality, the permit issuing authority..
10. EMC
The North Carolina Environmental Management Commis:
11. Grab Sample
An individual sample collected instantaneously. Grab samples that will be analyzed (quantitatively or
qualitatively) must be taken within the first 30 minutes oaf discharge.
12. Hazardous Substance <\
Any substance designated under_40 CFR Part r16 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 im�'pou"" ent, an injection well, a hazardous waste long-term storage facility or
a surface storage facility. f
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,
industrial machinery, raw materials, intermediate products, by-products, fmal 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 § l 22.26(g)
16. Notice of Intent
The state application form which, when submitted to the Division, officially indicates the facility's notice of
intent to seek coverage under an Individual Permit.
17, Permiee
The owner or operator issued a certificate of coverage pursuant to this -Individual Permit.
Part VI Page 2 of 4 Pages

Permit No. NCS000046
18. Point Source Discharge of Stormwater
Any discernible, confined and discrete conveyance including, but not specifically limited to, any pipe, ditch,
channel, tunnel, conduit, well, or discrete fissure from which stormwater is or may be discharged to waters
of the state.
19. Representative Storm Event
A storm event that measures greater than 0.1 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 begins within 10 hours.
20. Representative Outfall Status ,
When it is established that the discharge of stormwater runoff from a single outfall is representative of the
discharges at multiple outfalls, the DWQ may grant representative outfall status. Representative outfall
status allows the permittee to perform analytical monitoring at a reduced number of outfalls.
21. 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}
22, Section 313 Water Priority Chemical
A chemical or chemical category which: �
a. Is listed in 40 CFR 372.65 pursuantfto 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. Meets at least one of the following criteria:
(1) Is listed in appendix D of 40 CFR part 122 on Table II (organic priority pollutants), Table
III (certain metals,,cyanides, and phenols) or Table IV (certain toxic pollutants and
hazardous substances);
(2) Is list4as 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.
23. Severe Property Damage
Means substantial physical damage to property, damage to the control facilities which causes them to
become inoperable, or substantial and permanent loss of natural resources which can reasonably be
expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused
by delays in production.
24. 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.
25. 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).
Part VI I Page 3 of 4 Pages

Permit No. NCS000046
26. Stormwater Discharge Outfall (SDO)
The point of departure of stormwater from a discernible, confined, or discrete conveyance, including but not
limited to, storm sewer pipes, drainage ditches, channels, spillways, or channelized collection areas, from
which stormwater flows directly or indirectly into waters of the State of North Carolina.
27. Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following rainfall or as a
result of snowmelt.
28. Stormwater Associated with Industrial Activity
The discharge from any point source which is used for collecting and conveying stormwater and which is
directly related to manufacturing, processing or raw material storage areas, it an industrial site. Facilities
considered to be engaged in "industrial activities" include those activities defined in 40 CFR 122.26(b)(14).
The term does not include discharges from facilities or activities excluded from the NPDES program.
29. Stormwater Pollution Prevention Plan .r
A comprehensive site -specific plan which details measures•and practices, to reduce stormwater pollution and
is based on anevaluation of the pollution potential of the siie
30. Total Maximum Dail Load TMDL
TMDLs are written plans for attaining and rr
water body and pollutant. (A list of approves
http://h2o.enr.state.ne.us/tmdll)
31. Toxic Pollutant
Any pollutant listed as toxic under Section 3
quality standards, in all seasons, for a specific
state of North Carolina can be found at
of the Clean Water Act.
32. Vehicle Maintenance Activity I'le
Vehicle rehabilitation, mechanicalpairs, painting, fueling, lubrication, vehicle cleaning operations, or
airport deicing operations
33. Visible Sedimentation J.
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.
34. 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 4 of 4 Pages

STORMWATER POLLUTION PREVENTION PLAN
• DEVELOPMENT AND IlVIPLEMENTATION=
w. .. CERTIFICATION
North Carolina Division of Water Quality - Stormwater Permitting Unit
Facility Name: Airgas Speciality Gases
Permit Number: NCS000046 rES 6 Z0A5
location Address: 630 United Dr
Durham, NORTH CAROLINA 27713County: Durham WATER ocQ T
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments were
developed and implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel property gather and evaluate the information required by the SPPP. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information
gathered is, to the best of my knowledge and belief, true, accurate and complete."
And
"1 certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the terns and conditions of the stormwater discharge
permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign. (according tu.permit signatory requirements) and, return this Certification. DO NOT
SEND'STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION..
Signature co Dattej, 0[• t o . ts—
QfkC-CtLG ill�iv► C'�o [Tar �f1�1[,vk�.�c�
Print or.type name of person signing above Title
a--0- 4CL
SPPP Certification 5/09

YIF
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
DATE: November 20, 2009
TO: Herald Sun
EMAIL: [e-mail]
FROM: SARAH YOUNG, DIVISION OF WATER QUALITY
SUBJECT: PUBLIC NOTICE
PAGES: 1
Please publish only the information (Public Notice) below, ONE TIME in the legal section of your paper by
Tuesday, November 24, 2009. Please fax a copy of the proof to me at [phone] for final approval prior to
publication. Within 10 days after publish date, please send the invoice and two copies of the original affidavit
to:
Sarah Young
NCDENRIDWQ Stormwater Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
NC DIVISION OF WATER QUALITY INTENT TO ISSUE A STORMWATER DISCHARGE PERMIT
Public comment or objection to the draft permit is invited. Submit written comments to DWQ at the address below.
All comments received prior to December 24, 2009 will be considered in the final determination regarding permit
issuance and permit provisions.
Application: Airgas Specialty Gases, 630 United Dr., Durham, NC 27713 has applied for an NPDES permit to
discharge stormwater from an industrial facility at the same address in Durham County. The facility discharges to a
UT of Northeast Creek.
Copies of the draft permit, No. NCS000046, are available at: httpa/h2o.enr.state.nc.ustsu/publicnofce.htm .
Additional permit documents are available for the reproduction cost at:
DWQ Stormwater Permitting Unit
512 N. Salisbury Street (location, zip 27604)
1617 Mail Service Center (mail)
Raleigh, NC 27699-1617
DWQ Contact: Robert Patterson
(919)-807-6375
[e-mail]
Wetlands and Stommater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Intemet: www.ncwaterquality.org
An Equai Opportunity 1 Affirmative Action Employer
NorthCarolina
Natura!!'ff

N C 'D IVIS ION OF WATER
QUALITY INTENT To
ISSUE A STORMWATER
DISCHARGE PERMIT
Public commenter -ob-
jection to the draft.per--
m it is invited. Submit
w ritten comments to
DWQ at the address be -
I ow. All comments re-
ceived prior to Decem-
ber 24, :2009 will be
considered in the final
determination regard-
ing permit issuance and
permit provisions.
Application: Airgas Spe-
cialty Gases, 630 Unit-
ed Dr., Durham, NC
2 7713 has applied for
an NPDES permit to dis-
charge stormwater
from an industrial facility
at the same address in
'Durham County. The
facility discharges to a
UT of Northeast Creek.
Copies of the draft per-
mit, No. NCS0000461
are available at:
h ttp : //h2 o e nr. state.n c.0
s/su/public notice htm.
Additional permit docu-
ments are available for
the reproduction cost
at:
D WQ S tormwater
Permitting Unit
512 N. Salisbury Street
(location, ap 27604)
1 617 Mail Service_
Center (mail)
Raleigh, NC.
2 7699-1617 .
D WQ Contact:
Robert Patterson
(919)-807-6375
r obertp attersonO,
ncdenr.gov
H-S:.11-2412-009

T.
AFFIDAVIT OF PUBLICATION
State of North Carolina
County of Durham
Jennifer Snead, being duly swom, says that she is the
Principal Clerk of PMG, LLC, doing business as The Herald -
Sun, a newspaper published in and of general circulation in
said County, and that a notice of which the annexed is a True
Copy, was published in said newspaper one time on the 24th
day of November, 2009.
Pr
cip Clerk
Sworn to and subscribed before me this 6th day of
January, 2010.
Notary Public
My Commission Expires: 8-15-14
Durham County, North Carolina
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Bond 117 x 22) Papers commonly ed f
business forms. They have surfaces NO
readily from a pen or typewriter and whi r
erased. Most letterheads and business `
and 8-112 x 11 size. Four pieces thi-
17 x 22 sheet without wash.
Bond (17 x 22) Papers commonly used for
business forms. They have surfaces which .
readily from a pen or typewnter and which can
erased. Most letterheads and business forms are s
and 8-112 x 11 size. Four pieces this size can be cut out
17 x 22 sheet without waste.
1
apers monly used for letters and
o� h e surfaces which accept ink
.y writer and which can "easily be
hea and busines forms are stand-
s `L pieces this size can be cut out of a
V" P pens commonly used for letters and
ey have surfaces which accept ink
or typewnter and which can easily be
i- rheads and business forms are stand -
a aro Four pieces this size can be cut out of a
17 x 2'a ithout waste.
Bond (17 x 22) Papers commonly used for letters and business
forms.'fhey have surfaces which accept ink readily from a pen or
typewriter and which can easily be erased. Most letterheads and
business forms are standard 8-1/2 x 11 size. Four pieces this size
can be cut out of a 17 x 22 sheet without waste.
Bond (17 x 22) Papers commonly used for letters and business
forms. They have surfaces which accept ink readily from apen or
typewriter and which can easilyy be erased. Most letterheads and
business forms are standard 8-1/2 x 11 size.Four pieces this size
can be cut out of a 17 x 22 sheet without waste.
1
2"
B d [17 22) Papers commonly used for letters and business
to s. y have surfaces which accept ink readily from a pen or
type r and which can easily be erased. Most letterheads and
busin forms are standard 8-112 x 11 size. Four pieces this size
can c t out of a 17 x 22 sheet without waste.
Bo d (17 22) Papers commonly used for letters and business
f s. They ave surfaces which accept ink readily from a pen or
writer an which can casily be erased. Most letterheads and
usiness forms a standard 8-1/2 x 1 I size. Four pieces this size
can be cut out o 17 x 22 sheet without waste.
CI
C

PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
August 15, 2016
Mr. Daniel Farris
Airgas USA, LLC
630 United Drive
Durham, NC 27713
Sec;retary
TRACY DAVIS
Director
Subject: NPDES Stormwater Permit NCS000046
Airgas USA, LLC
Formerly Airgas Specialty Gases, Inc.
Durham County
Dear Mr. Farris:
Division personnel received your request to revise your stormwater permit to accurately reflect
your new company and/or facility name.
Find enclosed the revised permit cover page. The terms and conditions contained in the
Individual Permit remain unchanged and in full effect. This revised permit cover page is
issued under.the requirements of North Carolina General Statutes 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency.
Please note that the certificate of coverage shows the permit expired on January 31, 2015.
We received the renewal application on July 21, 2014 and currently have a back log of
renewals that we are working through. Please continue to abide by the conditions of the
expired individual permit until a new permit is issued for this facility.
If you have any questions or need further information, please contact the Stormwater
Permitting Program at [phone].
Sincerely,
ORiGINAI- SEGUED BY
BETHANY GEORGOI3UAS
for Tracy E. Davis, P.E., CPM, Director
Division of Energy, Mineral and Land
Resources
cc: Raleigh Regional Office
Stormwater Permitting Program Files
Central Files
State of Naath Carolina I Enviromnental Quality i Energy, Mineral and Laud Resources
1612 Mail Service Center 1 512 North Salisbury Street I Raleigh, North Carolina 27699-1612
919 707 9220 T

N
M
STATE OF NORTH CAROLINA -
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
PERMIT NO. NCS000046
TO DISCHARGE STORMWATER 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,
Airgas USA, LLC
is hereby authorized to discharge stormwater from a facility located at
Airgas USA, LLC
630 United Drive
Durham, NC
Durham County
to receiving waters designated as a UT of Northeast Creek, a class C; NSW stream in the Cape
Fear River Basin, in accordance with the discharge limitations, monitoring requirements, and
other conditions set forth in Parts I,11, III, IV, V and VI hereof.
This permit and the authorization to discharge shall expire at midnight on January 31, 2015.
Signed this day August 15, 2016.
ORIGINAL SIGNED BY
BETHANY GEOIRGOULIAS
for Tracy E. Davis, P.E., Director
Division of Energy, Mineral, and Land Resources
By the Authority of the Environmental Management Commission

M;IMA
Division of Energy, Mineral & Land Resources
Land Quality Section/Stormwater Permitting
= NCDENR
National Pollutant Discharge Elimination System
,� ram
PERMIT NAME/OWNERSHIP CHANGE FORM
1. Please enter the permit number for which the change is requested.
FOR AGENCY USE ONLY
Date Received
Year
Month
pay
NPDES Permit
(or) Certificate of Coverage
N d
E} 10
1 0 1
1 N 10 1 Cr
11. Permit status prior to requested change.
a. Permit issued to (company name):
Airgas Specialty Gases, Inc.
b. Person legally responsible for permit:
Daniel - Farris
First MI Last
Safety and Compliance Director
RECEIVED
Title
630 United Drive
APR 27 2016
Permit Holder Mailing Address
Durham NC 27713
W'NR4MM(111i1LI TY
City State Zip
.Vj'f &V& XAPSM[1TING
[phone] [phone]
Phone Fax
c. Facility name (discharge):
Airgas Specialty Gases, Inc.
d. Facility address:
630 United Drive
Address
Durham NC 27713
City State Zip
e. Facility contact person:
Charlie Winston [phone]
First / MI / Last Phone
Ill. Please provide the following for the requested change (revised permit).
a. Request for change is a result of:
❑ Change in ownership of the facility
® Name change of the facility or owner
If other please explain: Legal Entity Name Change Only
b. Permit issued to (company name):
Airgas USA, LLC
c. Person legally responsible for permit:
Daniel Farris
First MI Last
Safety And Compliance Director
Title
Airgas USA, LLC
Permit Holder Mailing Address
Durham NC 27713
City State Zip
[phone] dan.farris air as.com
Phone E-mail Address
d. Facility name (discharge):
Airgas USA, LLC _
e. Facility address:
630 United Drive
Address
Durham NC 27713
City State Zip
f. Facility contact person:
Charlie Winston
First MI Last
919 544-3773 charlie.winston air as.com
Phone E-mail Address
IV. Permit contact information (if different from the person legally responsible for the permit)
Revised Jan. 27, 2014

NPDES PERMIT NAME/OWNERSHIP CHANGE FORM
Page 2 of 2
Permit contact:
First MI Last
Title
Mailing Address
City State Zip
Phone E-mail Address
V. Will the permitted facility continue to conduct the same industrial activities conducted prior
to this ownership or name change?
® Yes
❑ No (please explain)
Vl. Required Items: THIS APPLICATION WILL BE RETURNED UNPROCESSED IF ITEMS
ARE INCOMPLETE OR MISSING:
❑ This completed application is required for both name change and/or ownership change
requests.
❑ Legal documentation of the transfer of ownership (such as relevant pages of a contract deed,
or a bill of sale) is required for an ownership change request. Articles of incorporation are
not sufficient for an ownership change.
The certifications below must be completed and signed by both the permit holder prior to the change, and
the new applicant in the case of an ownership change request. For a name change request, the signed
Applicant's Certification is sufficient.
PERMITTEE CERTIFICATION (Permit holder prior to ownership change):
1, Daniel Farris, attest that this application for a name/ownership change has been reviewed and is accurate
and complete to the best of my knowledge. I understand that if all required parts of this application are not
completed and that if all required supporting information is not included, this application package will be
ret d as incomplete.
r
4/13/2016
Signature
APPLICANT CERTIFICATION
Date
1, Daniel Farris, attest that this application for a name/ownership change has been reviewed and is accurate
and complete to the best of my knowledge. 1 understand that if all required parts of this application are not
completed and that if all required supporting information is not included, this application package will be
retu as incomplete.
Wie
April 13, 2016
Signature Date
PLEASE SEND THE COMPLETE APPLICATION PACKAGE TO:
Division of Energy, Mineral and Land Resources
Stormwater Permitting Program
1612 Mail Service Center
Raleigh; North Carolina 27699-1612
Revised Jan. 27, 2014

Delaware
page 1
The First State
I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF
DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT
COPY OF THE CERTIFICATE OF MERGER, WHICH MERGES:
"AIRGAS SPECIALTY GASES, INC.", A TEXAS CORPORATION,
WITH AND INTO "AIRGAS USA, LLC" UNDER THE NAME OF "AIRGAS
USA, LLC", A LIMITED LIABILITY CONPANY ORGANIZED AND EXISTING
UNDER THE LAWS OF THE STATE OF DEr.AWARE, AS RECEIVED AND FILED
IN THIS OFFICE ON THE TWENTY—THIRD DAY OF MARCH, A.D. 2016, AT
12:14 O'CLOCK P.M.
AND I DO HEREBY FURTHER CERTIFY THAT THE EFFECTIVE DATE OF
THE AFORESAID CERTIFICATE OF MERGER IS THE FIRST DAY OF APRIL,
A.D. 2016 AT 12:01 O'CLOCK A.M.
5032015 8100M
SR# 20161823385 `�"'"
You may verify this certificate online at corp.delaware.gov/authver.shtml
J�fTny W�u11uCR Seavlrq Or Si►7�
Authentication: 202034377
Date: 03-23-16

ATTACHMENT A
ASG RESTRUCTURING SUMMARY
Airgas, Inc. is carrying out a restructuring of its operating companies. Currently, Airgas,
Inc. is the owner and parent company of Airgas Specialty Gases, Inc., a Texas
corporation ('ASG'), and Airgas USA, LLC, a Delaware limited liability company ("Airgas
USA'). Effective April 9, 2016, Airgas, Inc. will merge ASG into Airgas USA. Airgas,
Inc. is and will remain the sole member (owner) of Airgas USA. When the restructuring
is complete ASG will no longer be a separate legal entity and all of the business and
operations of ASG will be carried out by Airgas USA. The restructuring is illustrated
below.
Pre -Restructuring
Airgas, Inc.
(Parent Company/Sole Owner)
Post -Restructuring
Airgas, Inc.
(Parent Company/Sole Member)
Airgas USA, LLC I I Airgas Specialty Gases, Inc. I I I Airgas USA, LLC

AfflgA
NCDENR
North Carolina Department of Environment and Natural
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Govemor Director
October 5, 2009
gu e�
tesources;w'I=--
uti• , J--
Individual NPDES Stormwater Permit Renewal Transmittal Cover Page
To: Raleigh Regional Office, Mack Wiggins
Subject- NPDES Stormwater Permit No. NCS000046
ASG Durham
Durham, NC (Durham County)
Attachment Description
® Staff Report
® Draft Permit
® Renewal Application
p4m,*'I �V ,
wy�'l
Dee Freeman
Secretary
k
i
7
Please provide comments on the facility, draft permit, and staff report and sign/return the
original staff report with comments.
Return to Robert Patterson at the Central Office by November 6, 2009.
Robert_Patterson^
Division of Water Quality
Stormwater Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
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-&4941 Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal opportunity 1 Affirmative Action Employer
CS
g
' NorthCarolina
Naturatt!f

NCS000046 RRO
A*A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
STAFF REVIEW AND EVALUATION
NPDES Stormwater Permit
Facility Name:
Airgas Specialty Gases - ASG Durham (formerly National Specialty Gases)
NPDES Permit Number:
NCS000046
Facility Location:
630 United Dr., Durham, NC (DURHAM County)
Type of Activity:
Industrial Gases
SIC Code:
2813
Receiving Streams:
UT of Northeast Creek, See Figure 1
River Basin:
Cape Fear River Basin, Sub -basin 03-06-05
Stream Classification:
WS-IV; NSW
Proposed Permit Requirements:
See attached draft permit.
Monitoring Data:
See Table 1
Response Requested by (Date):
October 26, 2009
Central Office Staff Contact:
Return to: Robert Patterson, [phone]
Special Issues:
" Issue :"
Rating Scale:;1 easy) to 10 and
Compliance history
3
Benchmark exccedance
1
Location (TMDL, T&E
s ecies, etc
5
Other Challenges:
1
Difficulty Rating:
10/40
Description of Onsite Activities:
• Repackage gases into smaller containers and ship them out.
• Loading and unloading of gases and liquid in larger tanks outside.
• Indoor cleaning and painting of gases cylinders.
Documents Reviewed:
• NPDES Stormwater Permit Application Materials
• National Heritage Program (NHP) Threatened and Endangered Species Database
• SPU File
• Central Files
• EPA Sector -Specific Permit, 2008
C ,I�
Page 1 of 6 OCT �
DENR ;ti

NCS000046
303(d) List, 2008 draft, 2006 final
2005 Cape Fear Basinwide Plan
History:
• Date permit first issued: October 21, 1994
• Date permit re -issued: December 10, 1999
• Date permit expired: December 31, 2004
• Owner changed from National Specialty Gases to Airgas Specialty Gases: April 2009
• Date RRO inspected facility: September 16, 2009
• Date permittee notified that permit never renewed: September 17, 2009
• Date permittee submitted renewal application: September 22, 2009
Page 2 of 6

NCS000046
Central Office Review Summary:
1. General Observations:
• 3 SDOs from the site; also some areas of sheet flow from the site.
• Outdoor storage of new and empty gas cylinders. Cylinders are painted steel, stainless steel, and
aluminum.
• Main storage tanks outside containing liquid N2, Ar, CO2, and 02; as well as gas Ar, 02, and H2.
• Loading/unloading dock is covered.
2. Im aTp irment: This segment (16-41-1-17-(0.7)a) is impaired due -standard violation offecal coliform, turbidity
and low DO in the 2006 303(d) list. The draft 2008 303(d) shows standard violations for only turbidity and low
DO. Existing TMDL approved in September 2003 forfecal coliform.
3. Threatened and Endangered: None shown on the database map.
4. Location: Facility discharges upstream of the Durham Triangle WWTP discharge to Northeast Creek; and is
south of the main part of the City of Durham.
5. Industrial Changes Since Previous Permit: None.
6. Analytical Monitoring Notes: No record of required monitoring having been conducted for Nitrogen and
Phosphorus. None submitted. The 2008 MSGP for this subsector (C2) has monitoring for Aluminum, Iron, and
Nitrate + Nitrite Nitrogen.
7. Oualitative Monitoring Notes: No record of required monitoring having been conducted during the permit term.
One monitoring event submitted, but performed after permit expired. No items of concern noted in this single
event.
Revised Permit Recommendations: Analytical Monitoring:
1. Nitrogen and Phosphorus will remain in the permit since the facility discharges to a NSW water; and since no
monitoring was done by the previous owner. TSS and COD will also be added due to the stream impairment.
Even though there is a TMDL for fecal coliform, it will not be added since the draft 2008 303(d) list no longer
shows standard violations for this segment of the stream.
2. pH has been added to the analytical monitoring requirements based on the current monitoring strategy.
3. All analytical monitoring has been set to semi-annually during a representative storm event as defined in Part II
Section B. The permittee must also document the total precipitation for each event. If no discharge occurs
during the sampling period, the permittee must submit a monitoring report indicating "No Flow" within 30 days
of the end of the six-month sampling period. Additionally, samples must be taken a minimum of 60 days apart,
as specified in Table 2.
4. Benchmarks for analytical monitoring have been added to this draft permit. Exceedances of benchmark values
require the permittee to increase monitoring, increase management actions, increase record keeping, and/or
install stormwater Best Management Practices (BMPs) in a tiered program. If the sampling results are above a
benchmark value, or outside of the benchmark range, for any parameter at any outfall then the facility shall
follow the Tier I guidelines which require a facility inspection within two weeks and implementation of a
mitigation plan within two months. If during the term of this permit, the sampling results are above the
benchmark values, or outside of the benchmark range, for any specific parameter at a specific discharge outfall
two times in a row (consecutive), then the facility shall follow the Tier 2 guidelines which require a repetition of
the steps listed for Tier 1 and also immediately institute monthly monitoring for all parameters at every outfall
where a sampling result exceeded the benchmark value for two consecutive samples.
5. The permittee is required to collect all of the analytical and qualitative monitoring samples during representative
storm events as defined in Part lI Section B. Qualitative monitoring is required regardless of representative
outfall status.
6. The permittee is responsible for all monitoring until the renewal permit is issued. See Footnote 1 of Tables 1, 4,
and 5.
Page 4 of 6

Regional Office Staff Comments Concerning Airgas Speciality Gases (Addition to page 6 of 6).
Airgas Specialty Gases has been in control since April 1, 2009. At the time of the site visit the facility had not
developed or implemented their stormwater plan. The Raleigh Regional Office recommend that the permit be
issued for the company to move forward with development and implementation of their program. Raleigh
Regional Office will follow an inspection within 180 days after issuance.
North Carolina Division of Water Duality Raleigh Regional office Surface Water Protection Phone [phone]
Intemet www.ncwaterquality.org 1628 Mail Service Center Raleigh, NC 27699-1628 FAX [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper
Naurally
Carolina
Customer Service
877-623-6748

NCS000046
f ,
Recommendations: Based on the documents reviewed, the application information submitted on September 22,
2009 sufficient to issue an Individual Stormwater Permit.
Prepared by (Signature) Date 9 Z 9
Stormwater Permitting Unit Supervisor � Date 9 2t O
for Bradley Bennett
Concurrence by Regional Office Date
RO Water Quality Supervisor
Regional
Staff Continents (attach additional pages as necessary)
Page 6 of 6

' N6000046
7. The flow reporting requirement has been removed per DWQ revised strategy. (The total rainfall parameter is in
this permit, however.)
8. Vehicle maintenance monitoring has been revised to semi-annually in order to coincide with analytical and
qualitative monitoring.
Other Proposed Changes to the Previous Permit:
1. Additional guidance is provided about the Site Plan requirements. The site map must now identify if the
receiving stream is impaired and if it has a TMDL established. It must also describe potential pollutants in each
outfall. The map requirements are stated more explicitly. And, the site plan must contain a list of significant
spills that have occurred in the past three years and also must certify that the outfalls have been inspected to
ensure that they do not contain non-stormwater discharges. Additional information is provided in Part II Section
A.
2. Additional requirements for the Stormwater Management Plan have been specified in Part II Section A. More
details regarding secondary containment are provided.
3. Additional requirements for the Stormwater Pollution Prevention Plan have been specified in Part II Section A.
The plan must also be updated annually to include a list of significant spills and to certify that the outfalls do not
_ contain non-stormwater discharges.
.4. The facility must now implement a semi-annual Facility Inspection Program of the site's stormwater
management controls as specified in Part II Section A. w
5. Information regarding the No Exposure Exclusion has been added to this draft permit. If industrial materials and
activities are not exposed to precipitation or runoff as described in 40 CFR § 122.26(g), the facility may qualify
for a No Exposure Exclusion from NPDES stormwater discharge permit requirements. Additional information
is provided in Part I Section A.
Discussions with permittee: Ken Jones (consultant for owner), 900-887-6752, 9/24/09 and 9/25/09
Q: What are the cylinders made of that are stored outside?
a. ANSWER: Cylinders are painted steel, stainless steel, and aluminum.
F
Page 5 of 6

1
NCQENR 4w
North Carolina Department of Environment and Natural Resources'.-
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
October 5, 2009
Individual NPDES Stormwater Permit Renewal Transmittal Cover Page
To: . Raleigh Regional Office, Mack Wiggins
Subject: NPDES Stormwater Permit No. NCS000046 .
ASG Durham
Durham, NC (Durham County)
Attachment Description
Staff Report
® Draft Permit
Renewal Application
Please provide comments on the facility, draft permit, and staff report and signlretum the
original staff report with comments.
Return to Robert Patterson at the Central Office by November 6, 2009.
Robert Patterson
Division of Water Quality
Stormwater Permitting Unit
1617 Mail Service Center
Raleigh, INC 27699-1617
Wetlands and Stormwater Branch
1617 Mail Service Center, Ralegh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604
Phone: [phone] FAX: 91 MOZ-6494 4 Customer Service: l -877-623.6748
Intemet: www,ncwaterquality.org
An Equal Opportunity; Affirmative Acton Employer
No hCarolina

NCS000046 RRQ
Jr-
WDEN
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
STAFF REVIEW AND EVALUATION
NPDES Stormwater Permit
Facility Name:
Airgas Specialty Gases - ASG Durham (formerly National Specialty Gases)
NPDES Permit Number:
NCS000046
Facility Location:
630 United Dr., Durham, NC (DURHAM County)
Type of Activity:
Industrial Gases
SIC Code'.
28I3
Receiving Streams:
UT of Northeast Creek, See Figure 1
River Basin:
Cape Fear River Basin, Sub -basin 03-06-05
Stream Classification:
WS-IV; NSW
Proposed Permit Requirements'.
See attached draft permit.
Monitoring Data:
See Table I
Response Requested by (Date):
October 26, 2009
Central Office Staff Contact:
Return to: Robert Patterson, [phone]
Special Issues:
Issue= >-
FRatin ,Scaieicl ea �` ;to 10 and
Compliance Kist
3
Benchmark exceedance
1
Location (TMDL, T&E
s ecies, etc
5
Other Challenges:
1
Difficulty Rating:
10/40
Description of Onsite Activities:
• Repackage gases into smaller containers and ship them out.
• Loading and unloading of gases and liquid in larger tanks outside.
• Indoor cleaning and painting of gases cylinders.
Documents Reviewed:
• NPDES Stormwater Permit Application Materials
• National Heritage Program (NHP) Threatened and Endangered Species Database
• SPU File
• Central Files
• EPA Sector -Specific Permit, 2008 � � r,
r 7
Page 1 of 6 c

NCS000046
• 303(d) List, 2008 draft, 2006 final
• 2005 Cape Fear Basinwide Plan
History:
Date permit first issued: October 21, 1994
• • Date permit re -issued: December 10, 1999
• Date permit expired: December 31, 2004
• Owner changed from National Specialty Gases to Airgas Specialty Gases: April 2009
• Date RRO inspected facility: September 16, 2009
• Date permittee notified that permit never renewed: September 17, 2009
• Date permittee submitted renewal application: September 22, 2009
Page 2 of 6

•
NCS000046 s
Central Office Review Summary:
1. General Observations:
3 SDOs from the site; also some areas of sheet flow from the site.
• Outdoor storage of new and empty gas cylinders. Cylinders are painted steel, stainless steel, and
aluminum.
• Main storage tanks outside containing liquid NZ, Ar, CO2, and 02; as well as gas Ar, 02, and H2.
Loadinglunloading dock is covered_
2. Impairment: This segment (16-41-1-17-(0.7)a) is impaired due standard violation offecal coliform, turbidity
and low DO in the 2006 303(d) list. The draft 2008 303(d) shows standard violations for only turbidity and low
DO. Existing TMDL approved in September 2003 for fecal coliform.
3. Threatened and Endangered: None shown on the database map.
4. Location. Facility discharges upstream of the Durham Triangle W WTP discharge to Northeast Creek; and is
south of the main part of the City of Durham.
5. Industrial Chan es Since Previous Permit: None.
6. Analytical Monitoring Notes: No record of required monitoring having been conducted for Nitrogen and
Phosphorus. None submitted. The 2008 MSGP for this subsector (C2) has monitoring for Aluminum, Iron, and
Nitrate + Nitrite Nitrogen.
7. Qualitative Monitoring Notes: No record of required monitoring having been conducted during the permit term.
One monitoring event submitted, but performed after permit expired. No items of concern noted in this single
event.
Revised Permit Recommendations: Analytical Monitoring:
1. Nitrogen and Phosphorus will remain in the permit since the facility discharges to a NSW water; and since no
monitoring was done by the previous owner. TSS and COD will also be added due to the stream impairment.
Even though there is a TMDL for fecal coliform, it will not be added since the draft 2008 303(d) list no longer
shows standard violations for this segment of the stream.
2. pH has been added to the analytical monitoring requirements based on the current monitoring strategy.
3. All analytical monitoring has been set to semi-annually during a representative storm event as defined in Part H
Section B. The permittee must also document the total precipitation for each event. If no discharge occurs
during the sampling period, the permittee must submit a monitoring report indicating "No Flow" within 30 days
of the end of the six-month sampling period. Additionally, samples must be taken a minimum of 60 days apart,
as specified in Table 2.
4. Benchmarks for analytical monitoring have been added to this draft permit. Exceedances of benchmark values
require the permittee to increase monitoring, increase management actions, increase record keeping, and/or
install stormwater Best Management Practices (BMPs) in a tiered program. If the sampling results are above a
benchmark value, or outside of the benchmark range, for any parameter at any outfall then the facility shall
follow the Tier 1 guidelines which require a facility inspection within two weeks and implementation of a
mitigation plan within two months. If during the term of this permit, the sampling results are above the
benchmark values, or outside of the benchmark range, for any specific parameter at a specific discharge outfall
two times in a row (consecutive), then the facility shall follow the Tier 2 guidelines which require a repetition of
the steps listed for Tier 1 and also immediately institute monthly monitoring for all parameters at every outfall
where a sampling result exceeded the benchmark value for two consecutive samples.
5. The permittee is required to collect all of the analytical and qualitative monitoring samples during representative
storm events as defined in Part 11 Section B. Qualitative monitoring is required regardless of representative
outfall status.
6. The permittee is responsible for all monitoring until the renewal permit is issued. See Footnote 1 of Tables 1, 4,
and 5.
Page 4 of 6

` NCS000046
7. The flow reporting requirement has been removed per DWQ revised strategy. (The total rainfall parameter is in
l this permit, however.)
8. Vehicle maintenance monitoring has been revised to semi-annually in order to coincide with analytical and
qualitative monitoring.
Other Proposed Changes to the Previous Permit:
1. Additional guidance is provided about the Site Plan requirements. The site map must now identify if the
receiving stream is impaired and if it has a TMDL established. It must also describe potential pollutants in each
outfall. The map requirements are stated more explicitly. And, the site plan must contain a list of significant
spills that have occurred in the past three years and also must certify that the outfalls have been inspected to
ensure that they do not contain non-stormwater discharges. Additional information is provided in Part II Section
A.
2. Additional requirements for the Stormwater Management Plan have been specified in Part II Section A.' More
details regarding secondary containment are provided.
3. Additional requirements for the Stormwater Pollution Prevention Plan have been specified in Part Il Section A.
The plan must also be updated annually to include a list of significant spills and to certify that the outfalls do not
contain non-stormwater discharges.
U. The facility must now implement a semi-annual Facility Inspection Program of the site's stormwater
management controls as specified in Part H Section A.
5. Information regarding the No Exposure Exclusion has been added to this draft permit. If industrial materials and
activities are not exposed to precipitation or runoff as described in 40 CFR § 122.26(g), the facility may qualify
for a No Exposure Exclusion from NPDES stormwater discharge permit requirements. Additional information
is provided in Part I Section A.
Discussions with permittee: Ken ]ones (consultant for owner), 800-887-6752, 9/24/09 and 9/25/09
1. Q: What are the cylinders made of that are stored outside?
a_ ANSWER: Cylinders are painted steel, stainless steel, and aluminum.
Page 5 of 6

NCS000046
Recommendations: Based on the documents reviewed, the application information submitted on September 22,
2009 sufficient to issue an Individual Stormwater Permit.
Prepared by (Signature) Date I 9
Stormwater Permitting Unit Supervisor _ / �v _ Date 9 Lf 4
for Bradley Bennett
Concurrence by Regional Office r Date
RO Water Quality Supervisor �'� Date
Regional Office Staff Comments Concerning Airgas Speciality Gases (Addition to page 6 of 6)f facility had not
me of
e site visit the
Airgas Specialty Gases has been in mwatcontrol plan April 1, 2009. At The Raleigh Regional Office recommend that the permit be
developed or implemented their stormwate p implementation of their program. Raleigh
issued for the company to move forward with development and
Regional Office will follow an inspection within 180 days after issuance.
Page 6of6

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
(This form is best filled out on computer, rather than hard copy. Then unprotect to
highlight in light blue as needed to make your comments more visible in the final printing.)
[But DON'T protect document again, or Word wipes out all you have entered.]
Date: �1k1.03':0 County: D
To: NPDES Discharge Permitting Unit Permitee: ( RER-10SUMMKIGase
Attn. NPDES Reviewer: Rob�ert�Ea tte'�i-�s Application/ Permit No.% N.CS0Q00.4
Staff Report Prepared By: Maw' M s
Project Name:
SOC Priority Project? (YIN) ___. If Yes, SOC No.
A. GENERAL INFORMATION
1. This application is (check a{i that apply): ❑ New ® Renewal
❑ Modification
2. Was a site visit conducted in order to prepare this report? ❑ Yes or ❑ No.
a. Date of site visit: 09/15/09
b. Person contacted and telephone number: Charlie Winston, 919-544-3773
c. Site visit conducted by: Mack Witggins Ph W
d. Inspection Report Attached: ❑ Yes or ❑ No.
2
D
NOV 1 2 2009
DENR - wATER QUALI
weuands & StonnwaW Branch
3. Keeping BIMS Accurate: Is the following BIMS information (a. through e. below) correct?
❑ Yes or ❑ No. If No, please either indicate that it is correct on the current application or the
existing permit or provide the details. If none can be supplied, please explain:
Discharee Point: ill this section only if BIMS or Application Info is incorrect or missin
(If there is more than one discharge pipe, put the others on the last page of this form.)
a. Location OK on Existing Permit ®, OR, if not, is
OK on Application ❑, or if neither is right, provide Location:
b. Driving Directions OK on Existing Permit ®, OR, if not, is
OK on Application ❑, or provide Driving Directions (please be accurate):
c. USGS Quadrangle Map name and number OK on Existing Permit ®, OR, if not, is
OK on Application ❑, or provide USGS Quadrangle Map name and number:
d. Latitude/Longitude OK on Existing Permit ❑, (check at bM://www.topozone.com These are
often inaccurate) or is OK on Application ❑, or provide Latitude: 35.936917 Longitude:
78.902886
e. Receiving Stream OK on Existing Permit ❑, OR, if not, is
OK on Application ❑, or provide Receiving Stream or affected waters: Unnamed tributary to
Northeast Creek
a. Stream Classification: C-NSW
b. River Basin and Sub basin No.: 030605
c. Describe receiving stream features and downstream uses:

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
For NEW FACILITIES Proceed to Section C Evaluation and Recommendations
For renewals or modi ications continue to section B
B. DESCRIPTION OF FACILITIES AND WASTE (renewals and modifications only)
1. Describe the existing treatment facility:
2. Are there appropriately certified ORCs for the facilities? ❑ Yes or ❑ No.
Operator in Charge: Certificate #
Back- Operator in Charge: Certificate #
(Available in BIMS or Certification Website)
3. Does the facility have operational or compliance problems? Please comment:
Summarize your BIMS review of monitoring data (Notice(s) of violation within the last permit cycle;
Current enforcement action(s)):
Are they currently under SOC, ❑ Currently under JOC, ❑ Currently under moratorium ❑? Have
all compliance dates/conditions in the existing permit, SOC, JOC, etc. been complied with? ❑ Yes
or ❑ No. if no, please explain:
4. Residuals Treatment: PSRP ❑ (Process to Significantly Reduce Pathogens, CIass B) or
PFRP ❑ (Process to Further Reduce Pathogens, Class A)?
Are they liquid or dewatered to a cake?
Land Applied? Yes ❑ No ❑ If so, list Non -Discharge Permit No.
Contractor Used:
Landfilled? Yes ❑ No❑ If yes, where?
Other?
Adequate Digester Capacity? Yes ❑ No ❑ Sludge Storage Capacity? Yes ❑ No ❑
Please comment on current operational practices:
5. Are there any issues related to compliance/enforcement that should be resolved before issuing this
permit? ❑ Yes or ❑ No. If yes, please explain:
C. EVAL UATIONAND RECOMMENDATIONS
1. Alternative Analysis Evaluation: has the facility evaluated the non -discharge options available? Give
regional perspective for each option evaluated:
Spray Irrigation:
Connect to Regional Sewer System:
Subsurface:
Other Disposal Options:
FORM: NPDES-RRO 06/03, 9/03, 1/07 2

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
2. Provide any additional narrative regarding your review of the application: This facility has gone
through a business change. Airgas Specialty Gases has been in control since April 1, 2009. The
facility has three outfalls. At the time of the inspection Airgas Specialty gases had not implement its
stormwater program as required by their permit. As per the plant manager implementation of the
program will begin immediately. RRO recommend that their individual Stormwater permit be issued.
3. List any items that you would like NPDES Unit to obtain through an additional information
request. Make sure that you provide a reason for each item:
Recommended Additional Information Reason
4. List specific Permit requirements that you recommend to be removed from the permit when
issued. Make sure that you provide a reason for each condition:.
Recommended Removal Reason
5. List specific special requirements or compliance schedules that you recommend to be included in
the permit when issued. Make sure that you provide a reason for each special condition:
Recommended Addition Reason
6. Recommendation: ❑ Hold, pending receipt and review of additional information by regional office;
❑ Hold, pending review and approval of required additional information by NPDES permitting
office; ® lssue; ❑ Deny. If deny, please state reasons:
Reminder. attach inspection report if Yeswas checked for 2 d. 0
7. Signature of report preparer:
Signature of WS�reegional supervisor:
Date:
Vv• /
FORM: NPDES-RRO 06/03, 9/03, 1/07 3

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
D. ADDITIONAL REGIONAL STA FF RE VIE W ITEMS
If next page is not used, PLEASE set printer for pages 1 through 3 to avoid wasting paper.
Use this page for facilities with more than one Discharge Pipe
Discharge Point: ff ill this section only if BIMS or Application Info is incorrect or missiniz)
a. Location OK on Application ❑,
OK on Existing Permit ❑, or provide Location:
b. Driving Directions OK on Application ❑,
OK on Existing PermitEl, or provide Driving Directions (please be accurate):
c. USGS Quadrangle Map name and number OK on Application ❑,
OK on Existing PermitEl or provide USGS Quadrangle Map name and number:
d. Latitude/Lonkitude OK on ApplicationEl, (check at http://topozone.com These are often
inaccurate) OK on Existing Permit ❑, or provide Latitude: Longitude:
e. Receiving Stream OK on Application ❑,
OK on Existing Permit ❑, or provide Receiving Stream or affected waters:
a. Stream Classification:
b. River Basin and Sub basin No.:
c. Describe receiving stream features and downstream uses:
Discharge Point: (Fill this section only if BIMS or Application Info is incorrect or missing)
a. Location OK on Application ❑,
OK on Existing Permit ❑, or provide Location:
b. Driving Directions OK on Application ❑,
OK on Existing Permit ❑, or provide Driving Directions (please be accurate):
c. USGS Quadrangle Map name and number OK on Application ❑,
OK on Existing Permit ❑, or provide USGS Quadrangle Map name and number:
d. Latitude/Longitude OK on Application ❑, (check at http://topozone.com These are often
inaccurate) OK on Existing Permit ❑, or provide Latitude: Longitude:
e. Receiving Stream OK on Application ❑,
OK on Existing Permit ❑, or provide Receiving Stream or affected waters:
a. Stream Classification:
b. River Basin and Sub basin No.:
c. Describe receiving stream features and downstream uses:
FORM: NPDES-RRO 06/03, 9/03, 1/07 4

5
Airgas Specialty Gases
630 United Drive
Durham, NC 27713
Phone [phone]
Fax [phone]
www.airgas.Com
September 17, 2009
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
Stormwater Permitting Unit
RE: NCS000046
Dear Sirs,
Airgas Speciality Gases (ASG) purchased this facility from National Specialty Gases (NSG) and
assumed control of the facility in April, 2009. NSG did not renew the permit in 2004 and
consequently, analytical monitoring and visual monitoring were not completed for the remaining
years at this facility. ,ASG is committed to fulfill North Carolina's Stormwater Discharge Permit
and to conduct and implement all the necessary requirements of the state.
ASG will employ all of the Best Management Practices contained in their new SW3P, some of
which are:
• Good housekeeping measures
• Garbage, trash and waste material are collected in dedicated containers
• Any drips or spills to be cleaned up immediately and disposed of properly
• Clearly mark and inspect all containers for use
• Provide necessary clean up materials
• Provide erosion control measures
• Establish records of inspections and maintenance
• Employee training and record keeping
There have not been any significant changes at the facility.
Best regards,
Charlie Winston
Plant Manager
Airgas Speciality Gases
45OW

��R�NG Permit Coverage
° Renewal Application Form
'I National Pollutant Discharge Elimination System Permit Number
o Stormwater Discharge Permit NCS000046
The following is the information currently in our database for your facility. Please review this information carefully and make all
corrections/additions as necessary in the space provided to the right of the current information.
Owner Affiliation Information
Owner / organization Name:
Owner Contact:
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
' Reissued Permit will be mailed to the owner address
National Specialty Gases
John Barris
PO Box 12013
RTP, NC 27709
[phone]
Facilitv/Permit Contact Information
Facility Name: Fayetteville Plant
Facility Physical Address: 630 United Dr
RTP, NC 27709
Facility Contact: John Harris
Mailing Address:
Phone Number.
Fax Number:
E-mail address:
Discharee Information
Receiving Stream:
Stream Gass:
Basin:
Sub -Basin:
Number of butfalls:
910-544-3772
S Gr DV ran a_ V n
r
C. b.c. t l it CAM-o v,
Ulm,"
.• s„t,�
Impaired WatersfrMDL
Does this facility discharge to waters listed as impaired or waters with a finalized TMDL? ❑ Yes ❑ No � Don't Know
( for information on these waters refer to http:/Ih2o.enr.state.nc.uslsulimpaired Waters TMDLI )
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such
information is true, complete and accurate.
Signature hil.� . _ , ,_. .. _.._,.. Date q . 1$ . Qq
�]Qa�rli� VIi�nSo�n TA6.4A
Print or type name of person signing above Title
Please return this completed renewal application form to: Stormwater Permitting Unit
Attn: Brian Lowther
1617 Mail Service Center
Raleigh, North Carolina 27699-1617

STORMWATER POLLUTIONPREVENTION PLAN
DEVELOPMENT AND IlVIPLEMENTATION
CERTIFICATION
North Carolina Division of Water Quality - Stormwater Permitting Unit
Facility Name: Airgas Speciality Gases
Permit Number. NCS000046
Location Address: 630 United Dr
Durham, NORTH CAROLINA 27713
County: Durham
"I certify, under penalty of law, that the Stonmvater Pollution Prevention Plan (SPPP) document and all attachments were
developed and implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information
gathered is, to the best of my knowledge and belief, true, accurate and complete."
Arid
"i certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the temp and conditions of the stormwater discharge
permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory requirements) and return this Certification. DO NOT
SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
Signature Date TI • • C)q
C A&A c L/l ns v n P ,nA
Print or type name of person signing above Title
SPPP Certification 5/09

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SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
Initials
(Do not submit the site Stormwater Pollution Prevention Plan)
1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities (including storage of materials, disposal areas, process areas and
loading and unloading areas), drainage structures, drainage areas for each outfall,
building locations and impervious surfaces should be clearly noted.
2. A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data. H
3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
parameters surveyed, observations, and date monitoring conducted.
Cw 4. A summary of the Best Management Practices utilized at the permitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. If the implementation of any BMP's is planned, please include
information on these BMP's.
_ 5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes, changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
CA-0 6. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal, then the last years monitoring results should be submitted
within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal
waiting on lab results)
Representative storm sampling may now be conducted anytime during the year (the April
to November window has been eliminated) and the representative rainfall event is now defined
as a storm event that measures greater than 0.1 inches and is preceded by at least 72 hours in
which no storm event measuring greater than 0.1 inches has occurred.

QUARTERLY VISUAL SAMPLING and RAIN FALL AMOUNTS
JAN. 1 TO MARCH 31, APRIL 1 TO JUNE 30
JULY 1 TO SEPT. 30, OCT. 1 TO DEC. 31
COMPANY: AIRGAS SPECIALITY GASES -Durham, NC
ADDRESS. 630 United Drive
CITY: Durham, NC 27713
DATE: q . i'1
TIME: 3 : dp
SAMPLIER: C r ki
OUTFALL NO. S VJ OO
in6Toh
NATURE OF DISCHARGE:
w a,%V%
RAINFALL AMOUNT.
3/4
RAINFALL DURATION:
VISUAL QUALITY:_
COLOR, ODOR: Cke,e-
'no neier
FLOATING OR SETTLED SOLIDS:
FOAM: T\
o,n E,
OIL SHEEN:
COMMENTS:
CAXwmen s and Settings%Gharire WinstoMl-oval SettingslTemPorary Internet Files%0LK901QuartifisuaNVC

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
September 17, 2009
National Specialty Gases
ATTN: John Harris, or Successor
PO Box 12013
RTP, NC 27709
Subject: NPDES Stormwater Permit Coverage Renewal
National Specialty Gases
Permit Number NCS000046
Durham County
Dear Permittee:
Dee Freeman
Secretary
Your facility is currently covered for stormwater discharge under NPDES Permit NCS000046. This
permit expired on December 31, 2004. To assure consideration for continued coverage under your
individual permit, you must apply to the Division of Water Quality (DWQ) for renewal of your permit.
Enclosed you will find an individual permit Renewal Application Form, Supplemental Information
request, and Stormwater Pollution Prevention Plan Certification for your facility.
Filing the application form along with the requested supplemental information will constitute your
application for renewal of this permit. Until your permit renewal is completed and you receive a new
permit, please continue to comply with all conditions and monitoring requirements in your expired
NPDES stormwater permit.
The application and supplement must be completed and returned to DWQ by November 17, 2009.
Failure to request renewal within this time period will result in delay of your permit renewal and may
result in a civil assessment. Discharge of stormwater from your facility without coverage under a valid
stormwater NPDES permit would constitute a violation of NCGS 143-215.1 and could result in
assessments of civil penalties of up to $25,000 per day.
If you have any questions regarding permit renewal procedures please contact Brian Lowther of the
Stormwater Permitting Unit at (919)-807-6368 or [e-mail].
Sincerely, f 1
Bradley Bennett, Supervisor
Stormwater Permitting Unit
Cc: Central Files
SPU Files
Raleigh Regional Office
Ken Jones — Sent electronically to [e-mail]
1617 Mail Service Center, Ralegh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Ralegh, North Carolina 27604
Phone: 919M7-6300 \ FAX: 91W7-64921 Customer Service:1-877-623-6748
Internet www.ncwaterqualfy.org
An Equal Opportunity 1 Affirmative Action Employer
NorthCarolina
Naturallil

Permit Coverage
}� Renewal Application Form Permit Number
A� National Pollutant Discharge Elimination System NCS000046
Stormwater Discharge Permit
The following is the information currently in our database for your facility. Please review this information carefully and
make all corrections/additions as necessary in the space provided to the right of the current information.
Owner Affiliation Information
Owner / Organization Name:
Owner Contact:
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
* Reissued Permit will be mailed to the owner address
National Specialty Gases
John Harris
PO Box 12013
RTP, NC 27709
[phone]
Facilitv/Permit Contact Information
Facility Name:
Fayetteville Plant
Facility Physical Address:
630 United Dr
RTP, NC 27709
Facility Contact:
John Harris
Mailing Address:
Phone Number: 910-544-3772
Fax Number:
E-mail address:
Discharge Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls:
Impaired WateCg MDL
Does this facility discharge to waters listed as impaired or waters with a finalized TMDL? ❑ Yes ❑ No ❑ Don't Know
( for information on these waters refer to http://h2o. enr state.nr. us/su/Impaired Waters TMDLI )
CERTIFICATION
I certify that 1 am familiar with the information contained in the application and that to the best of my knowledge and
belief such information is true, complete and accurate.
Signature
Date
Print or type name of person signing above Title
Please return this completed renewal application form to: Stormwater Permitting Unit
Attn: Brian Lowther
1617 Mail Service Center
Raleigh, North Carolina 27699-1617

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Alan W. Klimek, P.E., Director
May 3, 2004
NATIONAL SPECIALTY GASES
ATTN: JOHN HARRIS, OR SUCCESSOR
PO BOX 12013
RTP, NC 27709
VAI
f
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Stormwater Permit Renewal
National Specialty Gases
Permit Number NCS000046
Durham County
Dear Permittee:
Your facility is currently covered for stormwater discharge under NPDES Permit NCS000046. This permit expires
on December 31, 2004. North Carolina Administrative Code (15A NCAC 2H.0105(e)) requires that an
application for permit renewal be filed at least 180 days prior to expiration of the current permit. In order to assure
your continued coverage under your permit, you must apply to the Division of Water Quality (DWQ) for renewal
of your permit. To make this renewal process easier, we are informing you in advance that your permit will be
expiring. Enclosed you will find an individual permit renewal application form, supplemental information request,
and Stormwater Pollution Prevention Plan certification.
Filing the application form along with the requested supplimental information will constitute your application for
renewal of your permit. As stated above, the application form must be completed and returned along with all
requested information by July 9, 2004 in order for the permit to be renewed by December 31, 2004.
Failure to request renewal by July 9, 2004 may result in a civil assessment of at least $500.00. Larger penalties
may be assessed depending on the delinquency of the request. Discharge of stormwater from your facility without
coverage under a valid stormwater NPDES permit would constitute a violation of NCGS 143-215.1 and could
result in assessments of civil penalties of up to $25,000 per day.
1f you have any questions regarding the permit renewal procedures please contact Bill Mills of the Stormwater and
General Permits Unit at [phone], ext. 548_
Sincerely,
Bradley Bennett, Supervisor
Stormwater and General Permits Unit
cc: Central Files
Stormwater and General Permits Unit Files
Raleigh Regional Office
1617 Mail Service Censer, Raleigh, North Carolina 27699-1617 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

UNIITTED TAT
ES POSTAL SERVICE RJR 276
First -Class Mail
Postage & Fees Paid
LISPS
Permit No. G-10
• Print your name, address, and ZIP Code in this box •
Stormwater & General Permits Unit
Division of Wale, Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
I
110-6901
I I I I I I I I f r I I I i I I i t I p f I I I a a I I I f II

m SENDER:
16 ■Complete items 1 ardor 2 for additimial services.
to ■Completo items 3.4a, and 4b.
■ Print ymu name and address on the reverse of this form so that we can return this
card yom
this
■Aeac:hform to the fraru of the mailpisoe, or on the boric it space does not
mWrite'A ewetum Receipt RequeWed on the rnaWam bmiow the amide rxmibec
mThe Return Receipt wM show to whom the artids was depwared and the data
C dellvered-
0
3. Article Addressed to: 41L Article
I also wish to receive the
following services (for an
extra fee):
$
1. ❑ Addressee's Address
2. ❑ Restricted Delivery
A
Consult posirnaster for fee.
S.
CL
4b. Service Type
GERALD S CARVER
❑ Registered
NATIONAL SPECIALTY GASES
❑ Express Mail
PO BOX 12013
❑ Return Rno
RESEARCH TRIANGLE PARK, NC 27709
(NCS000046)
7 Date
_a
5. Received By. (Print Name)
8. Add 's E
and t
6. Signatu ddre me or Agent)
j
X
m_
P5 Form 3811, December 1994
10259-,97-B-01-m DC
8
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2005 Recommendations
DWQ will continue to monitor the New Hope Creek to identify stressors to the benthic
community. DWQ will continue to work with Durham stormwater program to pursue funding
for BMPs in the New Hope Creek watershed to further decrease nutrient loading into Jordan
Reservoir. Further recommendations to protect streams in urbanizing areas and to restore
streams in existing urban areas are discussed in Chapter 31.
Segment 16-41-1-(11.5)b and c remain on the 303(d) list. Segments 16-41-(0.5)a and b and 16-
41-(11.5)a will be removed from the 303(d) list. TMDLs (Chapter 35) will be developed for
identified stressors within 8-13 years of listing.
Water Quality Initiatives
In 1997, Durham County received a $750,000 CWMTF (Chapter 34) grant to purchase 340 acres
of conservation easements along New Hope Creek [ 16-41-1-(0.5)a] and Mud Creek [ 16-41-1-10]
in this watershed. The Triangle Land Conservancy (Chapter 34) also received a $2,750,000
CWMTF grant to acquire 392 acres along the New Hope Creek Greenway. In 1998, Chapel Hill
received a $502,000 CWMTF grant to acquire 105 acres of permanent easements along Dry
Creek. In 1999, NCEEP (Chapter 34) received a $582,500 CWMTF grant to stabilize and
restore 450 linear feet of Sandy Creek [1641-1-11] in Duke Forest and to construct a
bioretention areas to treat runoff from 25 acres of urban area. This grant also included
restoration of 8.2 acres of bottomland hardwood wetlands in the New Hope Creek watershed.
The NCEEP completed 3,000 linear feet of stream enhancement in the Sandy Creek watershed.
5.3.3 Northeast Creek [AU # 16-41-1-17-(0.7)a, bl and b2]
2000 Recommendations
The 2000 basin plan recommended that DWQ work with the stormwater programs to help
improve water quality in Northeast Creek.
Current Status
Northeast Creek [I6-41-1-17-(0.7)a] from US 55 to Durham Triangle WWTP (3.3 miles) is
Impaired for aquatic life because the turbidity standard was violated in 15 percent of samples and
the dissolved oxygen standard was violated in 11 percent of samples at sites BA197. This
segment is Supporting recreation because the fecal coliform bacteria standard was not violated
during intensive sampling to assess the standard at site BA197.
Northeast Creek [I6-41-1-17-(0.7)bII from Durham Triangle WWTP to Kit Creek (3.3 miles) is
Impaired for aquatic life because the turbidity standard was violated in 10.3 percent of samples at
site BA209. This segment is Impaired for recreation because the fecal coliform bacteria standard
was violated during intensive sampling to assess the standard at site BA209.
Northeast Creek [16-41-1-17-(0.7)b2] from Kit Creek to downstream of Panther Creek (3.2
miles) is Impaired for aquatic life because the turbidity standard was violated in 15 percent of
samples at site BA209. This segment is Supporting for recreation because the fecal coliform
bacteria standard was not violated during intensive sampling at site BA209. DWQ developed a
fecal coliform bacteria TMDL that was approved by EPA in September 2003. The TMDL
recommended a 90 percent reduction in bacteria loading from urban stormwater in Durham
(Chapter 35).
Chapter 5 = Cape Fear River Subbasin 03-06-05 57

2005 Recommendations
DWQ will continue to monitor Northeast Creek. DWQ will work with Durham stormwater
services where possible to help reduce the impacts of stormwater and to reduce bacteria loading
by 90 percent. Further recommendations to protect streams in urbanizing areas and to restore
streams in existing urban areas are discussed in Chapter 31.
All three segments will remain on the 303(d) list. TMDLs (Chapter 35) will be developed for
identified stressors within 8-13 years of listing.
5.3.4 Third Fork Creek [AU # 16-41-1-12-(1) and (2)]
2000 Recommendations
The 2000 basin plan recommended that DWQ continue to monitor Third Fork Creek to
determine the impacts of development in the watershed.
Current Status
Third Fork Creek [16-41-1-12-(1)] from source to 2 miles upstream of NC 54 (5.2 miles) is Not
Rated on an evaluated basis because Brenntag Southeast Incorporated (NC0086827) failed whole
effluent toxicity (WET) tests five times during the last two years of the assessment period. The
facility is in the headwaters of Third Fork Creek and instream impacts of these failures could not
be assessed. Chemical leaching at Brenntag may be a potential source of toxicity.
Third Fork Creek [ 16-41-1-12-(2)] from 2 miles upstream of NC 54 to New Hope Creek (3.9
miles) is Impaired for aquatic life because the turbidity standard was violated in 12 percent of
samples collected at site BA178 during the assessment period. This segment is Not Rated for
recreation because the fecal coliform bacteria screening criteria were exceeded at site BA178.
A TMDL (Chapter 35) was approved in January 2005 for total suspended solids that
recommended a 56 percent reduction in TSS mostly from the Durham stormwater system.
2005 Recommendations
DWQ will continue to monitor Third Fork Creek. DWQ will work with Durham stormwater
services where possible to help reduce the impacts of stormwater. DWQ will determine if
intensive sampling is needed to assess the fecal coliform bacteria standard in this creek
(Appendix X). The NPDES compliance process will be used to address -the significant permit
violations noted above.
Segment 16-41-1-12-(2) will be added to the 303(d) list. TMDLs (Chapter 35) will be developed
for identified stressors within 8-13 years of listing.
Water Quality Initiatives
The NCEEP completed 3,200 linear feet of stream restoration in this watershed (Chapter 34).
Chapter 5 — Cape Fear River Subbasin 03-06-05 58

CAPE FEAR River Basin Subbasin 03-06-05
Assessment Impaired Year
Waterbody and Description UnIt (AU) Class Subbasin Use Listed Category and Reason for Listing Potential Source(s) Miles or Acres
New Hope River Arm of B. 16-01-(0.5) WS4V&B 03-06-05 5 1,199.8 FW Acres
Everett Jordan Lake (below NSW CA
normal pool elevation)
From source at confluence of Morgan Creek and New Hope Creek Arm of B. AL 2002 5 Standard violation: Chlorophyll a MS4 NPDES
Everett Jordan Lake (a east -weal line across the southern tip of the formed WWTP NPDES
penisula) to Chatham Co
New Hope River Arm of B. 16-01-(3.5)a WS4VBB 03-06-05 5 6,673.3 FW Acres
Everett Jordan Lake (below NSW CA
normal pool elevation)
From Chatham County SR 1008 to Haw River Arm of B. Everett Jordan Lake, Haw AL 2006 5 Standard violation: Chlorophyll a WWTP NPDES
River
MS4 NPDES
Northeast Creek 16-01-1-1740.7)a WS4V 03-08-05 5 3.3 FW Miles
NSW
From US Hwy 55 to Durham Triangle WVVTP O 1998 4a Standard violation: Fecal Coliform MS4 NPDES
AL 2006 5 Standard violation: Turbidity
AL 2006 5 Standard violation: Low Dissolved
Oxygen
Northeast Creek 16-41-1-17-(0.7)b1 WS-IV
03-06-05
5
3.3 FW Mlles
NSW
From Durham Triangle WWTP to Kit Creek
REC
2000
4a
Standard violation: Fecal Coliform MS4 NPDES
AL
2006
5
Standard violation: Turbidity
Northeast Creek 16.41-1-17-(0.7)b2 WS4V
03-06-05
5
3.2 FW Milos
NSW
From Kit Creek to a point 0.5 mile downstream of Panther Creek
O
1998
4a
Standard violation: Fecal Coliform MS4 NPDES
AL
2006
5
Standard violation: Turbidity
Northeast Creek 16-41-1-1744) WS4V
03-06-05
6
1.2 FW Mlles
NSW CA
From a point 0.5 mile downstream of Panther Creek to New Hope Arm of B. Everett
AL
2000
6
Impaired biological integrity
Jordan Lake
r
Third Fork Creek 16.41-1-12-(1) C NSW
03-06-06
6
5.2 FW !Wiles
From source to a point 2.0 miles upstream of NC Hwy. 54
At_
1998
6
Impaired biological integrity VVWTP NPDES
North Carolina 303(d) List- 2006 Tuesday, June 19, 2007
CAPE FEAR Basin 03-06-05 Page 8 of 125

Cape Fear River Basin
Haw River 8-Digit Subbasin 03030002
Assessment Unit Number Name
Use
Use
Description
Support
Support
Reason for Parameter of Collection Listing IR
Classification DWQ Subbasin Miles/Acres
Watershed (s) Category
Rating
Rating Interest Year Year Category
16-41-1-17- Northeast Creek
030300020605 Aquatic Life
Impaired
Standard Violation Turbidity 2006 2006 5
(0.7)a
Aquatic Life
Impaired
Standard Violation Low Dissolved Oxygen 2006 2006 5
From US Hwy 55 to Durham Triangle WWTP
WS-IV;NSW 03-06-05 3.3
FW Miles
16-41-1-17- Northeast Creek 030300020605 Water Supply Impaired Standard Violation NO2+NO3-N 2006 2008 5
(0.7)bl
From Durham Triangle WWTP to Kit Creek
WS-IV;NSW 03-06-05 3.3 FW Miles
16-41-1-17- Northeast Creek
030300020605
Aquatic Life
Impaired
Standard Violation
Turbidity
2006
2006 5
(0.7)b2
Water Supply
Impaired
Standard Violation
NO2+NO3-N
2006
2008 5
From Kit Creek to a point 0.5 mile downstream of Panther
Creek
WS-IV;NSW 03-06-05 3.2 FW Miles
16-41-2-(5.5)b Morgan Creek
030300020607
Aquatic Life
Impaired
Biological Criteria
Ecologicalfbiological Integrity
2003
2000 5
From Meeting of the Waters to Chatham County SR 1726
Exceeded
Benthos
(Durham County SR 1109)
WS4V;NSW 03-06-06 4.1 FW Miles
16-41-2-(9.5) Morgan Creek (including the
030300020604
Aquatic Life
Impaired
Standard Violation
Turbidity
2006
2008 5
Morgan Creek Arm of New Hope
030300020607
River Arm of B. Everett Jordan
030300020608
Lake)
From Chatham County SR 1726 (Durham County SR 1109) to
New Hope Creek Arm of New Hope River Arm of B. Everett
Jordan Lake
WS-IV;NSW,CA 03-06-06 836.2 FW Acres
16-7a Little Troublesome Creek 030300020105 Aquatic Life Impaired Biological Criteria Ecologicallbiological Integrity 1994 2000 5
From source to Reidsville WVM Exceeded Benthos
C;NSW 03-06-01 3.5 FW Miles
16-7b Little Troublesome Creek 030300020105 Aquatic Life Impaired Biological Criteria Ecologicallbiological Integrity 2003 1998 5
From Reidsville WWTP to Haw River Exceeded Benthos
C;NSW 03-06-01 5.1 FW Miles
B. Draft 2008 303(d) List -Integrates! Report Category 5 Version-20080107 Page 9 of 96

• � ♦ - � 2 '
' .�C

11
General Permit
Table S.C-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark Monitoring
Concentration
Subsector C1. Agricultural Chemicals (SIC
2873-2879)
Nitrate plus Nitrite Nitro en
0.68 m
Total Lead'
Hardness Dependent
Total Iron
1.0 m
Total Zinc
Hardness Dependent
Phosphorus
2.0 mg/L
Subsector C2. Industrial Inorga.ric Chemicals
(SIC 2812-2819) Z �
Total Aluminum
0.75 mgl L
Total Iron
L mg/L
Nitrate plus Nitrite Nitrogen
0.68 mg/L
Subsector C3. Soaps, Detergents, Cosmetics,
and Perfumes (SIC 2841-2844)
Nitrate plus Nitrite Nitrogen
0.68 mg/L
Total Zinc'
Hardness Dependent
Subsector C4. Plastics, Synthetics, and Resins
(SIC 2821-2824)
Total Zinc
Hardness Dependent
1 The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix 3, "Calculating Hardness in Receiving Waters for
Hardness Dependent Metals." for methodology), in accordance Nvith Part 6.2.1.1, to identify the applicable `hardness
range' for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L increments.
Hardness Dependent Benchmarks follow in the table below:
Water
Hardness
Range
Lead
(mg/L)
Zinc
(mg/L)
0-25 mg/L
0.014
_
0.04
25-50 mg/L
0.023
0.05
50-75 mg/L
0.045
0.08
75-100 mg/L
0.069
0.11
100-125 mg/L
0.095
0.13
125-150 mg/L
0.122
0.16
150-175 mg/L
0:151
0.18
175-200 mg/L
0.182
0.20
200-225 mg/L
0.213
0.23
225-250 mg/L
0.246
0.25
250f mg/L
0.262
0.26
8.C.4 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table &C-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Stormwater Discharges Associated With Industrial Activity — Sector C 52

Part 8 — Sector -Specific Requirements for Industrial Activity
. , Subpart C — Sector C — Chemical and Allied Products Manufacturing, and f elining.
You must comply with Part 8 sector -specific requirements associated with your prin,cry
industrial activity and any co -located industrial activities, as defined in Appendix A. "rlic sector -
specific requirements apply to those areas of your facility where those sector-speci ic activities
occur. These sector -specific requirements are in addition to any requirements spocitied
elsewhere in this permit.
8.C.1 Covered Stormwater Discharges.
The requirements in Subpart C apply to stormwater discharges associated witl: i.9 u'� tri,
activity from Chemical and Allied Products Manufacturing, and Refining, facifitics, as identified
by the SIC Codes specified under Sector C in Table D-1 of Appendix D of -the pen -nit.
8.C.2 Limitations on Coverage.
K' 2.1 Prohibition ofNon-Stormwater Discharges. (See also Part 1.1.4) The foilowing are not
covered by this permit: non-stormwater discharges containing inks, paints, or
substances (hazardous, nonhazardous, etc.) resulting from an onsite spill, including
materials collected in drip pans; washwater from material handling and processing
areas; and washwater from drum, tank, or container rinsing and cleaning.
8.C.3 Sector -Specific Benchmarks
Table 8.C-1 identifies benchmarks that apply to the specific subsectors of Sector C.
These benchmarks apply to both your primary industrial activity and any co -located industrial
activities.
Stormwater Discharges Associated With Industrial Activity— Sector C 51

�r.
it

Pa I�aovi
Airgas-
Airgas Specialty Gases
630 United Drive
Durham, NC 27713
Phone [phone]
Fax [phone]
www.airgas.com
September 17, 2009
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
Stormwater Permitting Unit
RE: NCS000046
------------------------
Dear Sirs,
Airgas Speciality Gases (ASG) purchased this facility from National Specialty Gases (NSG) and
assumed control of the. facility in April, 2009. NSG did not renew the permit in 2004 and
consequently, analytical monitoring and visual monitoring were not completed for the remaining
years at this facility. ASG is committed to hilfill North Carolina's Stormwater Discharge Permit
and to conduct and implement all the necessary requirements of the state.
ASG will employ all of the Best Management Practices contained in their new SW3P, some of
which are:
• Good housekeeping measures
• Garbage, trash and waste material are collected in dedicated containers
• Any drips or spills to be cleaned up immediately and disposed of properly
• Clearly mark and inspect all containers for use
• Provide necessary clean up materials
• Provide erosion control measures
• Establish records of inspections and maintenance
• Employee training and record keeping
There have not been any significant changes at the facility.
Best regards, le-&== I
. � D
Charlie Winston t�
Plant Managed
Airgas Speciality Gases Cl-
#5000

0�w4ZR Permit Coverage
° Renewal Application Form
National Pollutant Discharge Elimination System Permit Number
Stormwater Discharge Permit NC5000O46
The following is the information currently in our database for your facility. Please review this information carefully and make all
corrections/additions as necessary in the space provided to the right of the current information.
Owner Affiliation Information ' Reissued Permit will be mailed to the owner address
Owner / Organization Name: National Specialty Gases
Owner Contact:
John Harris
Mailing Address:
PO Box 12013
RTP, NC 27709
Phone Number:
[phone]
Fax Number:
E-mail address:
Facility/Permit Contact Information
Facility Name: Fayetteville Plant
Facility Physical Address: 630 united Dr
RTP, NC 27709
Facility Contact: John Harris
Mailing Address:
Phone Number:
Fax Number:
E-mail address:
Discharge Information
Receiving Stream:
Stream Class:
Basin:
Sub -Basin:
Number of Outfalls:
910-544-3772
A S G_-D_� rh.�. �•
(0-40 (lni i r
+rh&z
i Oil SWA- -I
OuM�y - -YI1
Impaired WatemtTMDL
Does this facility discharge to waters listed as impaired or waters with a finalized TMI)L? l] Yes O No � Don't Know
( for information on these waters refer to http://h2o.enr.state.nc.uslsulimpaired_Woters—TMDLI )
CERTIFICATION
1 certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such
information is7true, complete and accurate.
Signature l"L._l+[.jie 4wft _ Date 9 . i 8 . oQ
Print or type name of person signing above Title �%_-3
Please return this completed renewal application form to: Stormwater Permitting Unit
Attn: Brian Lowther
1617 Mail Service Center
Raleigh, North Carolina 27699-1617

STORMWATER POLLUTION PREVENTION PLAN
- 'DEVELOPMENT AND IlbIPLEMENTATION
CERTIFICATION
North Carolina Division of Water Quality - Stormwater Permitting Unit
Facility Name:
Airgas Speciality Gases
Permit Number:
NCS000046
Location Address:
630 United Dr
Durham, NORTH CAROLINA 27713
County:
Durham
"1 certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments were
developed and implemented under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of the person
or persons who manage the system, or those persons directly responsible for gathering the information, the information
gathered is, to the best of my knowledge and belief, true, accurate and complete."
And
"i certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been
fully implemented at this facility location in accordance with the terms and conditions of the stormwater discharge
permit."
And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory requirements) and return this Certifcation. DO NOT
SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
Signature
Print or type name of person signing
Date q . 18. Qq
P ,-
Title Is
SPPP Certification 5/09

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TOTAL
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SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the application
to be considered complete:
(Do not submit the site Stormwater Pollution Prevention Plan)
Initials
_ 1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of
industrial activities (including storage of materials, disposal areas, process areas and
loading and unloading areas), drainage structures, drainage areas for each outfall,
building locations and impervious surfaces should be clearly noted.
2. A summary of Analytical Monitoring results during the term of the existing permit
(if your permit required analytical sampling). Do not submit individual lab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data. H
3. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports. The summary can consist of a table including such items as outfall number,
parameters surveyed, observations, and date monitoring conducted.
Cw 4. A summary of the Best Management Practices utilized at the permitted facility.
Summary should consist of a short narrative description of each BMP's in place at
the facility. If the implementation of any BMP's is planned, please include
information on these BMP's.
L 5. A short narrative describing any significant changes in industrial activities at the
permitted facility. Significant changes could include the addition or deletion of
work processes, changes in material handling practices, changes in material storage
practices, and/or changes in the raw materials used by the facility.
CA.0 6. Certification of the development and implementation of a Stormwater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal, then the last years monitoring results should be submitted
within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal
waiting on lab results)
Representative storm sampling may now be conducted anytime during the year (the April
to November window has been eliminated) and the representative rainfall event is now defined
as a storm event that measures greater than 0.1 inches and is preceded by at least 72 hours in
which no storm event measuring greater than 0.1 inches has occurred.

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QUARTERLY VISUAL SAMPLING and RAIN FALL AMOUNTS
JAN. 1 TO MARCH 31, APRIL 1 TO JUNE 30
JULY 1 TO SEPT. 30, OCT. 1 TO DEC. 31
COMPANY: AIRGAS SPECIALITY GASES -Durham, NC
ADDRESS: 630 United Drive
CITY: Durham, NC 27713
DATE: 9 . M .
TIME: 3 : Ob
SAMPLIER: C �MQ
1N 11%STo h
OUTFALL NO. SW CC)
j
NATURE OF DISCHARGE:
RAINFALL AMOUNT:
3jt{
RAINFALL DURATION: !a
q
VISUAL QUALITY: q
COLOR, ODOR: C��a.<
'mo n[tar
FLOATING OR SETTLED SOLIDS: t-%o ram,
FOAM: r%
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OIL SHEEN: f%o
ftc
COMMENTS:
CN3ocuments and Settings%Charlie WinstonlLocai SettinpUemporary lntemet FileM0LKW QuadVisuaMC

FACILITY: COUNTY
CITY: PERMIT NUMBER
Permit Information that needs to be Incorporated into Future Permit Revisions:
DATE COMMENTS
' 4

Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
Mr. Daniel Farris
Airgas USA, LLC
630 United Drive
Durham, NC 27713
Dear Mr. Farris:
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secrerary
TRACY DAVIS
August 15 2016 Director
AUG 2 2 201,�
Subject: NPDES Stormwater Permit NCS�O�16R��°na! OFce
Airgas USA, LLC
Formerly Airgas Specialty Gases, Inc.
Durham County
Division personnel received your request to revise your stormwater permit to accurately reflect
your new company and/or facility name.
Find enclosed the revised permit cover page. The terms and conditions contained in the
Individual Permit remain unchanged and in full effect. This revised permit cover page is
issued under the requirements of North Carolina General Statutes 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency.
Please note that the certificate of coverage shows the permit expired on January 31, 2015.
We received the renewal application on July 21, 2014 and currently have a back log of
renewals that we are working through. Please continue to abide by the conditions of the
expired individual permit until a new permit is issued for this facility.
If you have any questions or need further information, please contact the Stormwater
Permitting Program at [phone].
Sincerely,
ORIGINAL. SIGNED BY
BETHANY GEORGOULIAS
for Tracy E. Davis, P.E., CPM, Director
Division of Energy, Mineral and Land
Resources
cc: Raleigh Regional Office
Stormwater Permitting Program Files
Central Files
State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources
1612 Mail Service Center 1 512 North Salisbury Street I Raleigh, North Carolina 27699-1612
919 707 9220 T

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
PERMIT NO. NCS000046
TO DISCHARGE STORMWATER 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,
Airgas USA, LLC
is hereby authorized to discharge stormwater from a facility located at
Airgas USA, LLC
630 United Drive
Durham, NC
Durham County
to receiving waters designated as a UT of Northeast Creek, a class C; NSW stream in the Cape
Fear River Basin, in accordance with the discharge limitations, monitoring requirements, and
other conditions set forth in Parts I,1I, III, IV, V and VI hereof.
This permit and the authorization to discharge shall expire at midnight on January 31, 2015.
Signed this day August 15, 2016.
ORIGINAL SIGNED BY
BETHANY GEORGOULIAS
for Tracy E. Davis, P.E., Director
Division of Energy, Mineral, and Land Resources
By the Authority of the Environmental Management Commission

State of North Caro*,
Department of Environment
and Natural Resources
Division -of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
July 23, 1999
NATIONAL GAS SPECIALTY
_ ATTN: GERALD S. CARVER
PO BOX 12013 -
RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709
Dear Mr. Carver:
NCDENR
_
NORTH CAROLINArDEPAR7MENT,OF
WA EN.VIRONRENTND NU ATRAL ZSOURCE5
Subject: NPDES Permit Renewal Application
Permit Number NCS000046
Individual Stormwater Permit
Durham County
The Division of Water Quality's Stormwater and General Permits Unit hereby acknowledges receipt of your renewal
application for coverage under NPDES Permit Number NCS000046 on 7/23/99. The submitted renewal package
contained the following items:
➢ Signed application
➢ Site map
➢ Analytical monitoring results summary
➢ Visual monitoring results summary
➢ Best Management Practices summary
➢ Narrative describing significant changes at the permitted facility
➢ Signed Stormwater Pollution Prevention Plan certification
A review of the submitted material indicates additional information is needed. Please submit documentation
addressing the following items:
➢ VisuaI monitoring results summary - Do not submit individual lab reports. The summary can consist of a table
including such items as outfall number, parameters surveyed, observations. and date monitoring conducted_
The requested information or a deadline extension request must be submitted within 30 days of this letter. If the
required information is not received by this date, the Division will have no alternative but to return this application as
incomplete. If you have any questions or would like to discuss this letter, please contact me at [phone],
extension 584. ,
er y,
Antonio va E.
Environmental Enaineer
cc: Raleigh Regional Office
Stormwater and General Permits Unit
Central Files -
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

STORMWAIWR POLLUTION PREVMTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
N.C. Division of Water Quality, Stonnwater and General Pennits Unit
Facility Name: NATIONAL SPECIALTY GASES
Permit Number: NCS000046
Location Address: 630 UNITED DRIVE
RTP, NC 27713
County: DURHAM
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments
were developed and implemented under my direction or supervision in accordance with a system designed to assure
that qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of
the person or persons who manage the system, or those persons directly responsible for gathering the information,
the information gathered is, to the best of my knowledge and belief, true, accurate, and complete"
" I certify that the SPPP has been developed, signed and retained at the facility location and the SPPP has been fully
implemented at the named facility location in accordance with the terms and conditions of the stormwater general
permit."
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations"
Sign (according to permit signatory requirements) and return this Certification. DO NOT SEND THE
STORMWATER POLLUTION PREVENTION PLAN WITH THE CERTIFICATION.
Signature ,
Print or type name of person signing above
Date �r Z) I !_
Title
SPPP Certification 2199

STORMWAITR POLLUTION PREV . TION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
N.C. Division of Water Quality, Stormwater and General Permits Unit
Facility Name: NATIONAL SPECIALTY GASES
Permit Number: NCS000046
Location Address: 630 UNITED DRIVE
RTP, NC 27713
County: DURHAM
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments
were developed and implemented under my direction or supervision in accordance with a system designed to assure
that qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of
the person or persons who manage the system, or those persons directly responsible for gathering the information,
the information gathered is, to the best of my knowledge and belief, true, accurate, and complete"
"I certify that the SPPP has been developed, signed and retained at the facility Iocation and the SPPP has been fully
implemented at the named facility location in accordance with the terms and conditions of the stormwater general
permit."
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations"
Sign (according to permit signatory requirements) and return this Certification. DO NOT SEND THE
STORMWATER POLLUTION PREVENTION PLAN WITH THE CERTIFICATION.
Signature ,
Print or type name of person signing above
Date / - Z ) +
Title
SPPP Certification 2/99

kr
41
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
PERMIT COVERAGNEWAL APPLICATION
National Pollutant DMEarge Elimination System
Stormwater NPDES Permit NCS000046
National Specialty Gases
Permit Number NCS000046
Durham County
THIS APPLICATION MUST BE SIGNED AND RETURNED ALONG WITH THE REQUESTED
SUPPLEMENTAL INFORMATION TO THE DIVISION OF WATER QUALITY IN ORDER FOR YOUR
FACILITY TO QUALIFY FOR RENEWAL OF YOUR STORMWATER PERMIT NCS000046
PERMIT RENEWAL INFORMATION
The following is the information currently in our database for your facility. Please review this information carefully
and make all corrections as necessary in the space provided to the right of the current information.
Facility Name:
Mailing Address*:
Location Address:
Facility Contact:
Phone Number:
Fax Number:
E-mail address:
National Specialty Gases
PO BOX 12013
RESEARCH TRIANGLE PARK, NC 27709
630 UNITED DRIVE
RTP, NC 27713
GERALD S CARVER
[phone]
No number on file
No address on file
* This is the address to which all permit correspondence will be mailed
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge
and belief such information is true, complete and accurate. 4§� SignatureMN—Date 6 ~ 2, J 19
5
Print or type name of person signing above Title
Please return this completed renewal form, the information as requested on the next page, and any relevant
documentation to:
Individual Permit Renewal
Division of Water Quality
Stormwater and General Permits Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Attn: Tony Evans

-sPELTY�rES
July, 21 1999
SUMMARY OF INSPECTIONS
5/8/96- Waste drums need to be indoors and overpacked
-Scrap cylinders need disposal
-Some pavement crumbled
-Need Landscape Timbers to stop erosion
-Need to reorganize and clean outside truck area
10122/96- No significant adverse conditions
4/16/97- No significant adverse conditions
11/5/97-No significant adverse conditions
5/14/98-No significant adverse conditions
11/4/98-No significant adverse conditions
6/24/99-Need to remove scrap cylinders
-One area of parking lots needs repair
P. O. Box 12013
Research Triangle Park, N.C. 27709
Phone [phone]

•
I/�n Ior�
.S�PEl�LTY�s/�r'ES
P. O. Box 12013
Research Triangle Park, N.C. 27709
Phone [phone]
July 21, 1999
SUMMARY OF BEST MANAGEMENT PRACTICES
1.) Waste Liquids - Use of Mineral Spirits has been discontinued. All Oil and
Trichloroethane waste has been removed. We only use 1 waste can for Oil and 1
waste can for Trichloroethane; both are stored inside building. Each is recycled
as it becomes full.
2.) Storage - Continue to remove empty cylinders as necessary. Attempt to
Minimize accumulation.
3.) Eroding Areas - Installed landscape timber barriers and planted grass.
All sediments removed.
4.) Crumbled and Oil Stained Pavement Areas - All crumbled pavement areas
were removed and replaced with concrete.
5.) Sediment near Outfall SWO01 - All sediments removed.
6.) Truck Washing at Loading Dock - Removed hose and posted sign. All trucks
Are washed at commercial wash.
7.) Motor Oil from Trucks - Parking in designated areas, periodic maintenance on
Truck has eliminated oil leakage.
8.) Comprehensive Preventive Maintenance has been established and is
documented in plant files.

rn ��6 A� UNITED DRIVE �� cy��
ERODING
AREA TO BE
STABILIZED
1
If 35 --- ----- �� �� ASPHALT I
j-
PROPOSED PARKING
I
1
/ e , / /! !1 I I I ASPHALT PARKING
V I it
CONCRETE — — —- --- \ i
PROPOSED 1 ADDITION
/ ♦ / / I I LAB CHEMICAL J 7 I !
I STORAGE OFFICE
CABINET / — I � � I
Ar GAS alleawrw 1
GAS
LIQUID N2 �— IFA TA ON 1
/ 1 LIQUID Ar
TRANSFORMER 1 � �y��;Vie��
' / 1 LIQUID CO2
WAREHOUSE 0 gW 01LL �!
! t
1 ❑�-- DUM STER WITH LID
EMPTY CYLINDERS !!
1 0--o— LIQUID OZ
SPILL RESPONSE x '
EQUIPMENT 1 0 STORAGE GAS
(OIL ABSORBANTS,
' MOPS, ETC.) �
t 1 He STORAGE GASDRAIN To Z 2
j
! 1 E
CITY SEWER l CONCRETE Z x
ASPHALT -7 I
� He STORAGE GAS
PAINT ROM
S ZGRASS ^
I
RE7. WALL
' �3 1 H STORAGE GAS I L WOODS
! CYLINDER
ROOM ING TRUCK WASHING
AREA j s
� I
COVERED ! QI1�'�T�
CONTAINER �3 '
' STORAGE AREAiZ n
' SILENE GAS) 1
! ( LOADING DOCK Y '" o
U x
j r � �� DISPOSAL LC��(�c� �{�,(�.�C, � fCRUMBLED I ,
�, PAVEMENT-7
r Nc UNLOADING OPEN TOP TRAILER
i
ERODINGTBE
•
AREA kUhSE mp OIL
j PTY �YLIN©E x
! STAB LIZED TORAGE' p p �PA w x
�a�e.+a.• r= K— —x-- —x
WASTE DRUMS
WOODS
DATE I REVISIONS
DRAINAGE AREA
UU TFALL
AREA (ACRES)
PERVIOUS
IMPERVIOUS
TOTAL
SW00l
0.1
0.98
1.08
YA_TE�.'Ai=--STORAGE INDEX
�1 IARIOUS GASES tt GAS MIXTURES
1 IN METAL CYLINDERS
1,1,1,-TRICHLORGETHANE (50 GAL, DRUM)
02 25% SOUiUV, HYDROXIDE (2-20 GAL. DRUMS)
35% SULFURiC ACID (2-20 GAL. DRUMS)
1 WASTE OIL, WASTE MINERAL SPIRITS,
AND WASTE 1,10-TRICHLOROETHANE
LEGEND
— Y---- k-....-. FENCE
350-- - ---
,-—K--x r 1
ELEVATION CONTOUR
PROPERT`( LINE
TREE LINE
DRAINAGE FLOW DIRECTION
r_mom
w"wan
1 1 DRAINAGE AREA TO OUTFALL SWO01
® SPILL RESPONSE KIT LOCATION
REEERENCEL
BASE MAP TAKEN FROM SITE & GRADING PLAN SHEET C-1
DATED MAY 17, 1995 BY BLAKELY DESIGN GROUP.
NOTES:
1. COTOUR INTERVAL = 2 FEET
2, THIS MAP IS FOR STORMWATER PERMITTING PURPOSES ONLY.
THIS MAP IS NOT A SURVEY. LOCATION OF OUTDOOR MATERIALS
AND ACTIVITIES ARE APPROXIMATE.
SCALE: 1"= 30'
SITE DRAINAGE MAP
NATIONAL WELDERS
DURHAM, NORTH CAROLINA
SCALE AS NOTED APPROVED BY DRAWN BY: D.A.O.
DATE JANUARY 1995 DESIGNED BY REVISED
PROJECT NUMBER DRAWING NO.
MADE APPROVED � Y 1 59 —1 5 aonuary 22, t,�se s 62:, 7 FIGURE 2
a: o-A,sa�aso,.Dwo wo