NCS000569_Renewal application_20240415

a1
EPA Identification Number NPDES Permit Number Fa6fty Name OMB No.2040-0004
NCS000569 Linde Gas&Equipment Inc. Expires 07/31/2026
Form U.S.Environmental Protection Agency
t \71EPA Application for NPDES Permit to Discharge Wastewater
NPDES GENERAL INFORMATION
SECTIONi r
1.1 Applicants Not Required to Submit Form 1
1.1.1 Is the facility a new or existing publicly owned 1.1.2 Is the facility a sludge-only facility(i.e.,a facility
treatment works or has your permitting authority that does not discharge wastewater to surface
directed you to submit Form 2A? waters)?
If yes,STOP.Do NOT complete No If yes,STOP. Do NOT complete r0 No
Form 1.Complete Form 2A, If the Farm 1.Complete Form 2S.
facility is also a treatment works
treating domestic sewage,you
must also complete Form 2S.
- 1_2 Applicants Required to Submit Form 1
1.2.1 Is the facility a concentrated animal feeding 1.2.2 Is the facility an existing manufacturing,
operation or a concentrated aquatic animal commercial,mining,or silvicultural facility that is
c production facility? currently discharging process wastewater?
i Yes+ Complete Form 1 and [Z No Yes+ Complete Form No
cc Form 213. 1 and Form 2C.
1.2.3 Is the facility a new manufacturing,commercial, 1.2.4 Is the facility a new or existing manufacturing,
mining,or silvicultural facility that has not yet commercial,mining,or silvicultural facility that
Cr
commenced to discharge? discharges only nonprocess wastewater?
(] Yes-* Complete Form 1 and F] No ❑ Yes 3 Complete Form 1 0 No
Form 2D, and Form 2E.
a1.2.5 Is the facility a new or existing facility whose 1.2.6 Is the facility a new or existing treatment works
discharge is composed entirely of stormwater treating domestic sewage that discharges
associated with industrial activity or whose wastewater to surface waters?
discharge is composed of both stormwater and non-
stormwater?
Yes 4 Complete Form 1 and No [[ Yes 4 Complete Form 1, rn No
Form 2F unless Form 2S,and
exempted by 40 CFR any other
122.26(b)(14)(x)or applicable forms,
(b)(15). as directed by
your permitting
authori .
SECTIONDD• • • r
2_1 Facility Name
0
Linde Gas&Equipment Inc.
2_2 EPA Identification Number
'O NCDO84172469
us
d 2_3 Facility Contact
a Name(first and last) Title Phone number
= Terrance Caldwell Plant Manager
g [phone]
m
Email address
E
R
z [e-mail]
EPA Form 3510-1 Pagel

EPA Identification Number NPOES Permit Number Facifity Name OMB No.2040-0004
NC5000569 Linde Gas&Equipment Inc. Expires 07/31/2026
2_4 Facility Mailing;Address
Street or P.O.box
P.O.Box 12338
City or town State ZIP code
RTP NC 27709
�;. 2-5 Fact ty Location _
Street,route number,or other specific identifier
Ic 11 Triangle Drive
County name County code(if known)
Durham
E City or town State ZIP code
Durham NIC 27709
SECTION • I NAICS CODES1
3.1
st��codet ' Yon(optit5na�' -
2813
3-2 MCS Codes] Qesal p on(optional)
325120
SECTIONOPERATOR INFORMATION(40
Unde Gas&Equipment Inc.
O 4_2 Is the name you listed In Item 4.1 also the owner?
,.
tit
0 Yes ❑ No
4_3 OppOrStatus:
❑Public—federal ❑Public—state ❑Other public(specify)
o ✓❑Private ❑ Other(specify)
4 4 Phoho Number.of Operator
[phone]
EPA Forth 3510-1 Page 2

EPAldentificaticn Number NPDES Permit Number Facility Name OMB No.2040-0004
NC5000569 Linde Gas&Equipment Inc. Expires 07131/2026
1_5 Q eratorAddress
c Street or P.O.Box
City or town State ZIP code
0,,rti c,) L '7
CEmail address of operator
SECTION • i
c 5-1 Is the facility located on Indian Land?
❑ Yes ID No
SECTION -.
-0 6_1 Existing Environmental Permits(check all that apply and print or type the corresponding permit number for each)
d © NPDES(discharges to ElRCRA(hazardous wastes) ❑ UIC(underground injection of
surface water) fluids)
NC5000569 NCD084172469
w a ❑ PSD(air emissions) ❑ Nonattainment program(CAA) ❑ NESHAPs(CAA)
c
❑ Ocean dumping(MPRSA) ❑ Dredge or fill i Section 404) ❑ Other(specify)
W
SECTION1
1-1 Have you attached a topographic map containing all required information to this application?(See instructions for
C specific requirements.)
Yes ❑ CAFO—Not Applicable(See requirements in Form 2B.)
SECTIONOF i
8-1 Describe the nature of your business.
The trans-fill of industrial gases and ultrasonic testing.
N
N
N
C
.y
7
a
io
z
SECTION •• i
99.1 Does your facility use cooling water?
a ❑ Yes ❑ No-* SKIP to Item 10.1.
9,2 Identify the source of cooling water.(Note that facilities that use a cooling water intake structure as described at
y40 CFR 125,Subparts I and J may have additional application requirements at 40 CFR 122.21(r).Consult with your
NPDES permitting authority to determine what specific information needs to be submitted and when.)
o "
U
EPA Form 3510-1 Page 3

EPA Identification Number NPDES Permit Number Facility Name OMB No.2040-0004
NCS000569 Linde Gas&Equipment Inc. Expires 07/31/2026
SECTION1 VARIANCE REQUESTS1
10.1 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(m)?(Check all that
apply.Consult with your NPDES permitting authority to determine what information needs to be submitted and when.)
' ❑ Fundamentally different factors(CWA ❑ Water quality related effluent limitations(CWA Section
Section 301(n)) 302(b)(2))
❑ Non-conventional pollutants(CWA ❑ Thermal discharges(CWA Section 316(a))
Section 301(c)and(g))
0 Not applicable
SECTION1 CERTIFICATION STATEMENT(40
11.1 In Column 1 below,mark the sections of Form 1 that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note
that not all applicants are required to provide attachments.
Column 1 Column;2.
0 Section 1:Activities Requiring an NPDES ❑ w/attachments
Permit
El 2:Name,Mailing Address,and ❑ w/attachments
Location
0 Section 3:SIC Codes ❑ w/attachments
✓❑ Section 4:Operator Information ❑ wl attachments
0 Section 5:Indian Land ❑ w/attachments
✓❑ Section 6:Existing Environmental Permits ❑ w/attachments
Ee ,, ❑ wl additional
❑ Section 7:Map ❑ w/topographic map
attachments
Q: ✓❑ Section 8:Nature of Business ❑ w/attachments
✓❑ Section 9:Cooling Water Intake Structures ❑ w/attachments
m
' ❑ Section 10.:Variance Requests ❑ wl attachments
1Q' Section 11:Checklist and Certification
0 Statement ❑ w/attachments
'32
s: 11.2 Provide the following certification.(See instructions to determine the appropriate person to sign the application.)
,cy
Certification Statement
l 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 property gather and evaluate the information
submitted.Based on my inquiry of the person orpersons 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 fine and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Elaine Bradford Associate Director of Health,Safety and Environment
Signature Date signed
04/09/2024
EPA Forrn 3510-1 Page 4

EPA Identification Number NPDES Permit Number Facility Name OMB No.2040.0004
INC5000569 Linde Gas&Equipment Inc. Expires 07131/2026
Form U.S Environmental Protection Agency
2F \':EPA Application for NPDES Permit to Discharge Wastewater
NPDES STORMWATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY
SECTION • • • r
1.1 Provide information on each of the facili s outfalls in the table below
Ouffall Receiving Water Name Latitude Longitude
Number
1 Buck Branch 35.894-1806 -78.9863833
c
0
2 Buck Branch 35.8942222 -78.8863472
a
J
3 Buck Branch 35.8939167 -78.8863417
0 4 Buck Branch 35.8935667 -78.8864333
5 Buck Branck 35.8934167 -78.8869472
SECTION • r
2_1 Are you presently required by any federal,state,or local authority to meet an implementation schedule for
constructing,upgrading,or operating wastewater treatment equipment or practices or any other environmental
programs that could affect the discharges described in this application?
❑ Yes © No-+ SKIP to Section 3.
2_2 Briefly identify each applicable project in the table below.
Final Compliance
Brief Identification and Affected Outfalls Source(s)of Discharge Dates
Description of Project (list outfall numbers)
Repaired Projected
1=
a
L
Cam..
C
2_3 Have you attached sheets describing any additional water pollution control programs(or other environmental
projects that may affect your discharges)that you now have underway or planned?(optional item)
❑ Yes ❑ No
EPA Form 3510-21' Page 1

EPA Idendcation Number NPOES Permit Number Facility Name OMB No.2040-0OO4
NCS000569 Linde Gas&Equipment Inc. Expires 07/31/2026
SECTIONDRAINAGE MAP .t
- � 31 Have you attached a site drainage map containing all required information to this application?(See instructions for
;a guidance.)specific s .
tc:.at: P g )
:.�.
a E✓ Yes
SECTIONPOLLUTANT SOURCESt
41 Provide information on the facilitys pollutant sources in the table below.
Irtponrtous$urt`ace Area Total?SurFace Ama,Qiajned
tVlrrrttfl6� (Withftt a mile ra diusrofths`far Pity}i (yrM[w.a,rRile WItIo:of fh@ facif j __
specify units specify units
1 3.75 acres 3.75 acres
specify units specify units
2 0.62-5 acres 2.5 acres
specify units specify units
3 2.5 acres 2.5 acres
specify units specify units
4 6.25 acres 6.25 acres
specify units specify units
5 10 acres 10 acres
specify units specify units
4_2 Provide a narrative description of the facilitys significant material in the space below.(See instructions for content
requirements.)
c The drainage area to Outfall 1 is primarily used as a parking lot for employees.Industrial activity in this drainage area
consists of the storage of scrap metal dumpster and 2 x 40 ft.storage containers.
a: The drainage area to Outfall 2 is a landscaped portion of the facility.No significant materials have been stored in this
carea within the past 3 years.Commercial grade pesticides and fertilizers are applied seasonally.
The drainage area to Outfall 3 receives stormwater from the process area along the southern and eastern edge of
Building 184.Activities in this area which are exposed to stormwater include an outdoor dust collector.
Wastes collected in the dust collector have the potential to be hazardous.Significant materials stored in this area
include caustic(25%solution)which held in 55 gallon drums and is stored outdoors on secondary containment
4.3 Provide the location and a description of existing structural and non-structural control measures to reduce pollutants
in stormwater runoff. See instructions forspecificguidance.)
Stormimater Treatrnent
pool. —
Ntuntiefi Control Measums,,and:Treatinenf obit
2i
Outfall 1 Not applicable
Outfall 2 Not applicable
Outfall 3 Not applicable
Outfall 4 Not applicable
Outfall 5 Not applicable
EPA Forth 3510-217 Page 2

EPA Identification Number NPDES Permft Number Facility Name OMB No.2040-0OD4
NCS000569 Linde Gas&Equipment Inc. Pi 07l31/2026
SECTION •N STORMWATER • 41
51 Provide the fcllowing certification.(See instructions to determine the appropriate person to sign the application.)
I certify under penalty of law that the outfall(s) covered by this application have been tested or evaluated for the
presence of non-stormwater discharges. Moreover, I certify that the outfalls identified as having non-stormwater
discharges are described in either an accompanying NPDES Form 2C,2D,or 2E application.
Name(print or type first and last name) Official titie
Signature Date signed
a� 52 Provide the testing information requested in the table below.
n d nagp P�olrN
um6!r t7�atipiton,of'TestlggrMithodaUsed Dabe{sj�of TestJngl j Dilc#Iy�Obsenred'i
' 1 NA
a:
2 NA
3 NA
4 NA
5 NA
SECTION . SIGNIFICANT LEAKS OR 41
61 Describe any significant leaks or spills of toxic or hazardous pollutants in the last three years.
N/A
Jul",
J
t?7
SECTION1• • 4I
See the instructions to determine the pollutants and parameters you are required to monitor and,in turn,the tables you must
c com fete.Not all applicants need to complete each table.
71 Is this a new source or new discharge?
Yes+See instructions regarding submission of No+See instructions regarding submission of
estimated data. actual data.
72 Have you completed Table A for each outfall?
El Yes
EPA Form 3510-2F Page 3

EPA Identification Number NPDES Permit Number Facility Name OMB No.2040-0004
NCS000569 Linde Gas&Equipment Inc. Expires 07/3112026
7_3 Is the facility subject to an effluent limitation guideline(ELG)or effluent limitations in an NPDES permit for its
process wastewater?
❑ Yes 0 No 4 SKIP to Item 7.5.
7_4 Have you completed Table B by providing quantitative data for those pollutants that are(1)limited either directly or
indirectly in an ELG and/or(2)subject to effluent limitations in an NPDES permit for the facility's process
wastewater?
❑ Yes
7_5 Do you know or have reason to believe any pollutants in Exhibit 217-2 are present in the discharge?
❑ Yes ❑✓ No 4 SKIP to Item 7.7.
7_6 Have you listed all pollutants in Exhibit 2F-2 that you know or have reason to believe are present in the discharge
and provided quantitative data or an explanation for those pollutants in Table C?
❑ Yes
7_7 Do you qualify for a small business exemption under the criteria specified in the Instructions?
❑ Yes+SKIP to Item 7.18. No
7_8 Do you know or have reason to believe any pollutants in Exhibit 2F-3 are present in the discharge?
0 Yes ❑ No 4 SKIP to Item 7.10.
o
c; 7_9 Have you listed all pollutants in Exhibit 2F-3 that you know or have reason to believe are present in the discharge in
o, Table C?
❑ Yes
7.10 Do you expect any of the pollutants in Exhibit 2F-3 to be discharged in concentrations of 10 ppb or greater?
❑ Yes No 4 SKIP to Item 7.12.
7.11 Have you provided quantitative data in Table C for those pollutants in Exhibit 2F-3 that you expect to be discharged
in concentrations of 10 ppb or greater?
❑ Yes
7.12 Do you expect aaclein,acrylonitrile,2,4-dinitrophenol,or 2-methyl-4,6-dinitrophenol to be discharged in
concentrations of 100 ppb or greater?
❑ Yes 0 No+SKIP to Item 7.14.
7.13 Have you provided quantitative data in Table C for the pollutants identified in Item 7.12 that you expect to be
discharged in concentrations of 100 ppb or greater?
❑ Yes
7.14 Have you provided quantitative data or an explanation in Table C for pollutants you expect to be present in the
discharge at concentrations less than 10 ppb(or less than 100 ppb for the pollutants identified in Item 7.12)?
Yes
7.15 Do you know or have reason to believe any pollutants in Exhibit 21F4 are present in the discharge?
❑ Yes S No 4 SKIP to Item 7.17.
EPA Form 3510-2F Page 4

EPA IdentificatEon Number NPDES Permit Number Fadlity Name OMB No.2040-0004
NCS000569 Linde Gas&Equipment Inc. Expires 07/31/2026
7.16 Have you listed pollutants in Exhibit 2174 that you know or believe to be present in the discharge and provided an
explanation in Table C?
❑ Yes
7.17 Have you provided information for the storm event(s)sampled in Table D?
0
c
0
0 Yes
.v
oF Used.op;l)Il?nufactured Tox;cs
7.18 Is any pollutant listed on Exhibits 217-2 through 217-4 a substance or a component of a substance used or
manufactured as an intermediate or final product or byproduct?
ea El Yes ❑ No 4 SKIP to Section 8.
LM
7.19 List the pollutants below,including TCDD if applicable.Attach additional sheets,if necessary.
c
1• Arsenic 4. 7.
2. 5. 8.
3. 6. 9.
SECTION 8.BIOLOGICAL TOXICITY TESTING DATA(40 CFR 122.21(G)(11))
81 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made
a; on any of your discharges or on a receiving water in relation to your discharge within the last three years?
c
e` ❑ Yes 0 No 4 SKIP to Section 9.
8_2 Identify the tests and their purposes below.
Submitted to NPDES
TOM* P,urlm of Tests}; Dbte$ubmltteri:
F ❑ Yes ❑ No
❑ Yes ❑ No
;m
❑ Yes ❑ No
SECTION • CONTRACT ANALYSIS •• • • 41
-�� 9_1 Were any of the analyses reported in Section 7(in Tables A through C)performed by a contract laboratory or
consulting firm?
❑ Yes ❑r No 4 SKIP to Section 10.
g 9_2 Provide information for each contract laboratory or consulting firm below.
rg Laboratory Number 1 Laboratory Number 2. .Labo_rator NuM*r 3s
Name of labor atoryffirm
c
7A. .
Laboratory address
o
Phone number
;n
Pollutant(s)analyzed
EPA Form 3510-2F Page 5

EPA Identification Number NPDES Pennft Number Facirfty Name OMB No.2040-0004
NCS000569 Linde Gas&Equipment Inc. Expires 07/31/2026
SECTION1 CHECKLIST AND CERTIFICATION STATEMENT(40 1 1
10.1 In Column 1 below,mark the sections of Form 2F that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note
that not all applicants are required to complete all sections or provide attachments.
Como 1, Column
Section 1 ❑ wl attachments(e.g.,responses for additional outfalls)
0 Section 2 ❑ w/attachments
B Section 3 ❑ wl site drainage map
ID Section 4 ❑ wl attachments
0 Section 5 ❑ wl attachments
Section 6 ❑ w/attachments
m ❑ Section 7 ❑ Table A ❑ wl small business exemption request
�E.
❑ Table B ❑ wl analytical results as an attachment
�i
❑ Table C ❑ Table D
El Section 8 ❑ wl attachments
a
0 Section 9 ❑ wl attachments(e.g.,responses for additional contact laboratories or firms)
,t
❑ Section 10
Q 10.2 Provide the following certification.(See instructions to determine the appropriate person to sign the application)
Certification Statement
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision
in accordance with a system designed to assure that qualiCred personnel properly gather and evaluate the information
submitted.Based on my inquiry of the person orpersons 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 fine
and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Elaine Bradford Associate Director of Health,Safety and Environment
Signature Date signedX�
c�
EPA Form 3510-2F Page 6

EPA Identification Number NPDES Permit Number Facility Name Outfall Number OMB No.2040-0004
NC5000569 Unde Gas&Equipment Inc. Outfall 1 Expires 07131/2026
You must provide the results of at least one anall sis for every pollutant in this table.Complete one table for each outfall.See instructions for additional details and requirements.
� titltlil(rfiDs(iy DEscJtafge A1tellage dal ) is Source;ofi
(6 �:. Irlfonnatlan
Pollutant ocParameter GrabhBeinpte'iTaKen Gib srltplh Taken ;; (new ounxr�tetr:
mbe>tsof Storm
OWNFirst; ! FlolwWelo Dtllt Fib 'Ft�shlT►.�lifelgltbetl Events Satnpled ordy;use
80'Mgi fp"p1__ es:n.instruiansj
1. Oil and grease
2: Biochemical oxygen demand(BODS)
.31 Chemical oxygen demand(COD)
4: Total suspended solids(TSS) 23.4 mg/L 2 SDO Monitoring
5. Total phosphorus 0.16 mg/L 2 SDO Monitoring
6. Total ICddahl nitrogen(TKN)
7. Total nitrogen(as N) 0.64 mg/L 2 SDO Monitoring
pH(minimum) 6.2 2 SDO Monitoring
e.
pH(maximum)
t Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR Chapter I,Subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-21F Page 7

EPA Identification Number NPDES Pemdt Number Facility Name Outfall Number OMB No.2040.0004
NCS000569 Linde Gas North America LLC Outfall 2 Expires 07/3112026
TABLE A.CONVENTIONAL AND NON CONVENTIONAL PARAMETERS(40 CIFIR 122.26(Q1)(I)(Q3))'
You must provide the results of at least one anali sis for every pollutant in this table.Complete one table for each outfall.See instructions for additional details and uirementL
- -
aUlnur�flA �q� .iscitatge aeage>Daii �Discherg®
Sourrtree of
th►t } teu►�� NunrrJd>(z itifonnatiae
Pal,�,ultanl;or�alretin�er.' ,.�t�.�Sa�r!P1e Takein ,Ftowahfeightetl ��ple 1T8k$n ' ,��,Wetghted; �vent8 Safh,�eth �tgew eaar�naw
Duiiig Fin�t' �iing+First i. f - ordy use
:.. � 80`Minufes
301N[Inutes' !:� ' ostntctidri's)
1,. Oil and grease
Biochemical oxygen demand(BOD5)
Chemical oxygen demand(COD)
-4,, Total suspended solids(TSS) 35.5 mg/L
2 SDO Monitoring
5 Total phosphorus 0.13 mg/L 2 SDO Monitoring
(3: Total Kjeldahl nitrogen(TKN)
7. Total nitrogen(as IN) 0.94 mg/L 2 SDO Monitoring
pH(minimum) 6-4 2 SDO Monitoring
13.
rpHmaximum)
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR Chapter I,Subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-21F Page 7

EPA Identification Number NPDES Permit Number Facility Name Outfall Number OMB No.2040-0004
NCS000569 Linde Gas North America Outfall 3 Expires 07/31/2026
TABLE A.CONVENTIONAL AND NON • •
You must provide the results of at least one analysis for every pollutant in this table.Complete one table for each outfall.See instructions for additional details and re uirements.
Maximum Daily Discharge Average Daily Discharge Source of
(specify units) (specify units) dumber of Storm Information
Pollutant or Parameter Grab Sample Taken Grab Sample Taken (new sourcelnew
During First Flow-Weighted ed During First FlComposite Events Sampled dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BODs)
3. Chemical oxygen demand(COD)
4. Total suspended solids(TSS) 7.8 mg/L
2 SDO Monitoring
5. Total phosphorus -
2 SDO Monitoring
6. Total Kjeldahl nitrogen(TKN)
7. Total nitrogen(as N) - 2 SDO Monitoring
pH(minimum) 7.9 2 SDO Monitoring
a.
pH(maximum)
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR Chapter I,Subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F Page 7

EPA Identification Number NPDES Permit Number Facility Name Dutfall Number OMB No.2040-0004
NCS000569 Linde Gas North America LLC Outfall 4 Expires 07/3112026
TABLE A.CONVENTIONAL AND NON CONVENTIONALI
You must provide the results of at least one analysis for every pollutant in this table.Complete one table for each outfall. See instructions for additional details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
{specify units) (speci(y units) Number of Storm Information
Pollutant or Parameter Grab Sample Taken Grab Sample Taken (new sourcafnew
During First Flow-Weighted ed During First Flow-Weighted Events Sampled dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BODs)
3. Chemical oxygen demand(COD)
4. Total suspended solids(TSS) 32.8 mg/L
2 SDO Monitoring
5. Total phosphorus 0.089 mg/L
2 SDO Monitoring
6. Total Kjeldahl nitrogen(TKN)
7. Total nitrogen(as N) 0.59 mg/L 2 SDO Monitoring
pH(minimum) 6.6 2 SDO Monitoring
8.
pH(maximum)
Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR Chapter I,Subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F Page 7

EPA Identification Number NPDES Permit Number Facility Name Outfall Number OMB No.2040-0004
NCS000569 Linde Gas North America LLC Outfall 5 Expires 07/31/2026
TABLE A.CONVENTIONAL AND NON CONVENTIONAL
You must provide the results of at least one analysis for every pollutant in this table.Complete one table for each outfall.See instructions for additional details and requirements.
Maximum Daily Discharge Average Daily Discharge Source of
(specify units) (specify units) Number of Storm Information
Pollutant or Parameter Grab Sample Taken Grab Sample Taken (new sourcelnew
During First Flow-Weighted ed During First Flow-►Composite
Events Sampled dischargers only;use
30 Minutes Composite 30 Minutes Composite codes in instructions)
1. Oil and grease
2. Biochemical oxygen demand(BODs)
3. Chemical oxygen demand(COD)
4. Total suspended solids(TSS) 11.2 mg/L
2 SDO Monitoring
5. Total phosphorus 2 SDO Monitoring
6. Total Kjeldahl nitrogen(TKN)
7. Total nitrogen(as N) 0.72 mg/L
2 SDO Monitoring
pH(minimum) s.s
2 SDO Monitoring
8.
pH(maximum)
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e„methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR Chapter I,Subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2F Page 7

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources— Stormwater Program
Facility Name: Linde Gas&Equipment,Inc.
Permit Number: NCS000569
Location Address: 11TriangleCrive
Durham,NC 27709
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 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 41912024
Elaine Bradford Associate Director of Health,Safety and Environment
Print or type name of person signing above Title
SPPP Certification 10/13

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 t'ronl the Stornlwater PollLrtion Preve116011 Plan. "rile location of
industrial activities (incllidim, storage of materials. disposal areas. process areas and
loadim, and t111loadim, areas). drainage structures. drainage areas for each outfalL
building locations and impervious surfaces should be clearly noted.
?. A summary of Analytical Monitoring results during the tern 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.
;. A summary of the Visual Monitoring results. Do not submit individual monitoring
reports, The summary can consist of a table incfudim, such items as outfall number.
parameters surveyed. observations. and date monitoring conducted.
4. A SL1111111ary ofthe Best Management Practices utilized at the permitted facility.
Sunlnlary 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 indLIStrial activities at the
permitted facility. Si�-nificant changes could include the addition 01•deletion or
work processes. changes in material handlings practices. changes in material storage
practices. and/or cliari-es in the raw materials Used by the Facility.
6. Certification of'the developmeilt and impleineritatioil ofa Stoi•irnvater Pollution
Prevention Plan for the permitted facility (Sign and return attached form).
IFthe final year analytical monitoring of the existing permit term has not been completed
prior to tiling the renewal submittal. then the last years monitoring results should be submitted
within 30 days ofreceipt of the laboratory reports. (i.e. do not withhold renewal submittal
waitin" on lab results)

Discharge Characteristics Benchmark Results Outfall l Results Outfall2 Results Outfall 3 Results Outfall4 Results Outfall 5
23-1 a n-23
Total Suspended Solids{TSS) 100 mg/L 7.1 35.5 NO 5.7 N
Nitrogen,Total 30 mg/L 0.64 0.94 NO 0.59 0.72
Phosphorus,Total 2 mg/L 0.16 0.13 NO 0.089 NO
Arsenic,Total Recoverable 0.34 mg/L 1.8 NO 5.8 8.1 NO
pH 6-9 6.2 6.4 6.7 6.5 6.6
19-May-23
Total Suspended Solids(TSS) 100 mg/L 6.6 24.6 ND 8.1 11.2
Nitrogen,Total 30 mg/L .? NO ND 0.78 0.58
Phosphorus,Total 2 mg/L 0.14 ND 0.098 NO
Arsenic,Total Recoverable 0.34 mg/L NO ND 7.4 ND
pH 6-9 5.8 .. 6 6.4 6.6
Jun-23 Unable to take samples due to delayed delivery of sample bottles and no appropriate sample window occurred after receipt of bottles
14-J u 1-23
Total Suspended Solids(TSS) 100 mg/L 44.3 !!r% 12.5 16.9
Nitrogen,Total 30 mg/L i I1.2 !! 0.83 1.1
Phosphorus,Total 2 mg/L U.2 0.23 N,D 0,079 ND
Arsenic,Total Recoverable 0.34 mg/L NO 0.7D^ 1 0.0062 NO
pH 6-9 5.6 5.7 5.6 6.3 6.4
Aug-23 No measurable rainfall on site duringworking hours.
Sep-23 No measurable rainfall on site duringworking hours.
Ocl-2- No measurable rainfall on site duringworking hours.
21-Nov-23
Total Suspended Solids(TSS) 100 mg/L 11.8 7.8 50.7 71.9
Nitrogen,Total 30 mg/L - 1.1 0.82 1.3 0.57
Phosphorus,Total 2 mg/L u.: / 0.19 NO 0.14 0.091

Arsenic,Total Recoverable 0.34 mg/L i'_' J.o-V` ND
pH 6-9 G. , ...._ Ln
Dec-23 No measurable rainfall on site during working hours.
18-1an-24 Samples were collected on 1/16/24 and picked top by lab on 1/18/24.Samples were processed between 1/19/24 and 1/30/24
Total Suspended Solids(TSS) 100 mg/L 23.4 31.8 2.8 32.8 17.6
Nitrogen,Total 30 mg/L ND ND ND ND ND
Phosphorus,Total 2 mg/L ND ND ND ND ND
Arsenic,Total Recoverable 0.34 mg/L ND ND ND ND ND
pH 6-9 7.8 7.9 7.9 8 7.9
26-Feb-24
pH 6-9 6.5
7-Mar-24 (rec'd 3/21/24)
Total Suspended Solids(TSS) 100 mg/L 28.3 227 ND 105 23
Nitrogen,Total 30 mg/L 1.3 1.1 ND 0.93 0.75
Phosphorus,Total 2 mglL 0.1 0.13 ND 0.22 ND
Arsenic,Total Recoverable 0.34 mg/L ND ND 1.1 12.8 ND
pH 6-9 6.3 6.6 6.4 6.6 6.6
Summary: 4 full sampling sets of(all 5 outfalls)were completed in
2023.

June 7th 2023 Frank Porterfield emailed a request for sample bottles to Pace Labs.
June 19, 2023 After not receiving a response to his request on the 7th he sent a 2nd request to a differe
June 19th Nicole (HSE) arranged for sample bottles to be delivered on a monthly basis.

!nt person and then received a respose and confirmation.

June 7th 2023 Frank Porterfield emailed a request for sample bottles to Pace Labs.
June 19, 2023 After not receiving a response to his request on the 7th he sent a 2nd request to a differe
June 19th Nicole (HSE) arranged for sample bottles to be delivered on a monthly basis.

ant person and then received a respose and confirmation.

Discharge Characteristics Benchmark Results Outfall l Results Outfall 2 Results Outfalt 3 Results Outfalt 4 Results Outfall 5
23-1an-23
Total Suspended Solids(TSS) 100 mg/L 7.1 35.5 ND 5.7 19
Nitrogen,Total 30 mg/L 0.64 0.94 ND 0.59 0.72
Phosphorus,Total 2 mg/L 0.16 0.13 ND 0.089 ND
Arsenic,Total Recoverable 0.34 mg/L 1.8 ND 5.8 8.1 ND
pH 6-9 6.2 6.4 6.7 6.5 6.6
19-May-23
Total Suspended Solids(TSS) 100 mg/L 6.6 24.6 ND 8.1 11.2
Nitrogen,Total 30 mg/L 1.1 ND ND 0.78 0.58
Phosphorus,Total 2 mg/L G. 0.14 ND 0.098 ND
Arsenic,Total Recoverable 0.34 mg/L F ND ND 7.4 ND
pH 6-9 5.8 6 6.1 6.4 6.6
Jun-23 Unable to take samples due to delayed delivery of sample bottles and no appropriate sample window occurred after receipt of bottles
14-Jut-23
Total Suspended Solids{TSS} 100 mg/L 37.2 44.3 ND 12.5 16.9
Nitrogen,Total 30 mg/L 1.2 1.2 ND 0.83 1.1
Phosphorus,Total 2 mg/L 0.21 0.23 ND 0.079 ND
Arsenic,Total Recoverable 0.34 mg/L ND ND 0.002 0.0062 ND
pH 6-9 5.6 5.7 5.6 3.0 6.4
Aug-23 No measurable rainfall on site during working hours.
Sep-23 No measurable rainfall on site during working hours.
act = No measurable rainfall on site during working hours.
21-Nov-23
Total Suspended Solids(TSS) 100 mg/L 16.7 11.8 7.8 50.7 71.9
Nitrogen,Total 30 mg/L 3.4 1.1 0.82 1.3 0.57
Phosphorus,Total 2 mg/L 0.47 0.19 ND 0.14 0.091

Arsenic,Total Recoverable 0.34 mg/L
pH 6-9
Dec-23 No measurable rainfall on site during working hours.
18-Jan-24 Samples were collected on 1/16/24 and picked up by lab on 1/18/24.Samples were processed between 1/19/24 and 1/30124
Total Suspended Solids(TSS) 100 mg/L 23.4 31.8 2.8 32.E 17.6
Nitrogen,Total 30 mg/L NO NO NO NO NO
Phosphorus,Total 2 mg/L NO ND ND ND ND
Arsenic,Total Recoverable 0.34 mg/L NO ND NO ND NO
pH 6-9 7.8 7.9 7.9 8 7.9
26-Feb-24
pH 6-9 6.5
7-Mar-24 (rec'd3/21/241
Total Suspended Solids(TSS) 100 mg/L 28.3 227 NO 105 23
Nitrogen,Total 30 mg/L 1.3 1.1 NO 0.93 0.75
Phosphorus,Total 2 mg/L 0.1 0.13 NO 0.22 NO
Arsenic,Total Recoverable 0.34 mg/L ND ND 1 A 12.8 NO
pH 6-9 6.3 6.6 6.4 6.6 6.6
Summary: 4 full sampling sets of(all 5 outfalls)were completed in
2023.

February 2023 Site HSE Coordinator was hired
June 2023 researched and found CEC Consultants-Todd Lippman
July 2023 PO Issued to CEC Consultants and began working with Bruce Reilly

February 2023 Site HSE Coordinator was hired
June 2023 researched and found CEC Consultants-Todd Lippman
July 2023 PO Issued to CEC Consultants and began working with Bruce Reilly

Visual Monitoring Results 2022 & 2023
Evaluation Potential Source of Stormwater
Outfall# Date: Method Pollution Observations
2022
1 12/29/2022 Visual Dumpster discharge/Vehicles None
2 12/29/2022 Visual Vehicles None
Oil from compressors, paint residue,
3 12/29/2022 Visual rust from yard None
Dike chemicals, rust from scrap
4 12/29/2022 Visual metal None
5 12/29/2022 Visual Vehicle oils,yard rust from cylinders None
2023
Dumpsters,Vehicles, Forklift
1 12/28/2023 Visual maintenance None
Dumpsters,Vehicles, Forklift
2 12/28/2023 Visual maintenance None
Hazwaste seconary containment,
3 12/28/2023 Visual filter bank, incinerator cleaning None
Secondary containment,vehicles,
4 12/28/2023 Visual site chemicals None
Vehicles, paint from structures,rusty
5 12/28/2023 Visual roof, paint/flam cabinets None

Visual Monitoring Results 2022 & 2023
Evaluation Potential Source of Stormwater
Outfall# Date: Method Pollution Observations
2022
1 12/29/2022 Visual Dumpster discharge/Vehicles None
2 12/29/2022 Visual Vehicles None
Oil from compressors, paint residue,
3 12/29/2022 Visual rust from yard None
Dike chemicals, rust from scrap
4 12/29/2022 Visual metal None
5 12/29/2022 Visual Vehicle oils,yard rust from cylinders None
2023
Dumpsters,Vehicles, Forklift
1 12/28/2023 Visual maintenance None
Dumpsters,Vehicles, Forklift
2 12/28/2023 Visual maintenance None
Hazwaste seconary containment,
3 12/28/2023 Visual filter bank, incinerator cleaning None
Secondary containment,vehicles,
4 12/28/2023 Visual site chemicals None
Vehicles, paint from structures, rusty
5 12/28/2023 Visual roof, paint/flam cabinets None

___ -ram 5 --_�-�����• -.r _T —36a— i.f,`id�au,M��w1
J NO-ES:
Indusinal artnIty to th,s -
i _ + r•1'� - �l drainage area comsis of '�'�`^•�^"�"w b>,».r-,a,.
- y ! _ ee�aannu.n..x..,.,o�..e.,mom.•�c...w.cw
Ile storage of a scrap r "�""�•` ' "`n
metal dumpster and the ��'r"+naPa:�•oa�o'"nrn,.
storage of metat pallets
WWI 2
NoinduSmalatlwu+ns
in M6 area
E
-SrOWOT'BR4. -
ataraa s. .,^ _� _ T0utiall3
'�"- Industrial artMltes in this area include storage
` al campees d gas cypnders and soap metals.
towing and unloading area of materws
:towing
gases)and smalS scale painting of
cylinders.All painting is performed under
owl
Out}all4 ,
_ industnal activities in this area include storage
of compressed gas cylinders and swap
4 . metal;loading and unloading area of
m_ -__-'-,.�,;:�v` aternal,Wrnadly 9asesl and sm sca all le
sett[a _.- _ pamung of cylinders.All painting is I s�oF=i'v
prfnnned under corer. sen.e.,•.av
F.r
Indusidafactivities I this area , I
,l intltt(Se the,nonage of
of 91 F F..c.6
'. tompressed gas cif indeesand11- ;,.e
imeloadi loading
W—By oa Ie 1 :s Rr -..r.L,Ii rir.Jlc Q .NG ZR7of
4 e✓2

' � .. t _ t �_ -tm rt�a,rr•d raYlq�
fa0
Qutfall3 •.b'�""`a.,r.,.
industral attmty in this
�. drainage arcs consists of
■ `�� the stn age al a scrap
-l •�. j metal sl r ter and the
storage of metal pallets
r �V �•�+- y_ No industrial anmlres /
In th.s area
... ry rwsram t-stun.
4 auaowa
r-stow IaeC• � -
� eswrc - - ,Uldall3 �
tndttstrial activities in this area include storage- /.
of compressed gas cyprldm artd strap metals,
loading and unoading area of m Ierials J
- (pdmarih-gases)and small sraie painting of
.rylindm.All painting is perfonnd under
� :over
r
outfalla '
Indtamal"tivlUes in this area include storage p
of compressed gas cyflnders and scrap
y metals,loading and unloading area of /
I' s arry 1 r- - - / � �„. wlerlals(primarily gases)and smail scale
- s LIfn T _i m cylinders.All of cylind All painting is
periormed under Corer. srxr:r•-sv
E3 ..e
/
IndW Li.de �� /yc h4 r9 +a.,
Indust 4Le
� - rial activities in this area /
F i„dudethe storage of 1�7f F '�/
' e-
compressedg cyfi -
- the loading and unload got "�'" �- fr Tnry�f�^�� )< Pa•kr N� Z�7of
M1 f w1enal.orintadly gases.
_� l � 1 � I — - � ��I�jtrr...wwf er Rt✓Z

BMPs at Linde RTP
BMP Rationale for 2023 Review/Evaluation
Implementation
Inspection and maintenance: To prevent stormwater 2023 Review: There is no change in this BMP
Personnel perform inspection and contamination due to or its effectiveness. Plant General Inspections
maintenance on drainage ways. the malfunction or scheduled process and equipment preventative
stornlwater structures. storm drainpipes. deterioration of maintenance programs and the good catch/near-
any erosion areas.and all related facilities facilities related to miss reporting Culture helps to maintain SWPPP
to maintain them in good condition. Any stormwater. standards.
servicin4j) is documented as appropriate.
Routine maintenance: Personnel To prevent stormwater 2023 Review: There is no change in this BMP
conduct routine maintenance for on-site contamination due to or its effectiveness. Plant General Inspections.
equipment to ensure pr0per functioning the malfunction. failure. scheduled process and equipment preventative
and prevent malfunctions or other or deterioration of on- maintenance programs ensul'e SWPPP standards
maintenance issues that could lead to a site equipment. are maintained.
spill or inhibit the response to a spill.
Preventive maintenance: There is an To prevent stornlwater 2023 Review: There is no change in this BMP
ongoing preventive maintenance contamination due to or its effectiveness. Plant General Inspections
pro4grain in place which is in place to plan the malfunction. failure. scheduled process and equipment preventative
in advance and replace equipment or or deterioration of on- maintenance programs ensure SWPPP standards
equipment components (such as site equipment. are maintained. The site also maintains critical
equipment. facility. vehicles. and storage spare equipment so that any issues that impact
tanks) prior to malfunction. BMP effectiveness can be addressed in a timely
fashion.
Manufacturer's recommendations: To prevent stornlwater 2023 Review: There is no change in this BMP
Personnel follow- the manufacturers contamination due to or its effectiveness. Process equipment is
recommended operating and the misuse of facility operated and maintained according to
maintenance procedures to the extent equipment. manufacturer recommendations wherever
practicable and allowed by the processes practical in order to avoid avoidable incidents
at the facility. that may impact BMP effectiveness. Any
change in equipment or use is addressed though
the change management program.
Response Materials: The facility is To ensure that 2023 Review: There is no change in this BMP
equipped with spill kits containing personnel can respond or its effectiveness. The RTP Iacility is staffed
equipment to respond to a spill of quickly to any spills to with a trained On-Alert response Team
cheinicals. prevent contaminated equipped with all necessary spill hits and
stornlwater ftom containment materials to address leaks or spills
removing the site. that would potentially impact the site's SWPPP.
Roofing: Any areas where paint. aerosol To mirlinlize exposru•e 2023 Review: There is no change in this BMP
cans. or other materials are stored are ol'potential pollutants to or its effectiveness. Paints and aerosol cans are
covered under a metal root' to prevent stormwater. stored under covered structures (buildings or
exposure to stormwater. metal canopies) to prevent exposure to
stormwater and site runoffs that could
potentially impact the site's SWPPP.

BMPs at Linde RTP
BMP Rationale for 2023 Review/Evaluation
Implementation
Inspection and maintenance: To prevent storinwater 2023 Review: There is no chanuc in this BMP
Personnel perform inspection and contamination dUe to or its effectiveness. Plant General Inspections
maintenance on drainage ways. the malfunction or scheduled process and equipment preventative
stormwater structures. storm drainpipes. deterioration of maintenance programs and the good catch/near-
any erosion areas.and all related facilities facilities related to miss reporting culture helps to maintain SWPPP
to maintain them in Oood condition. Any stormwater. standards.
servicing is documented as appropriate.
Routine maintenance: Personnel To prevent stornlwater 2023 Review: There is no change in this BMP
conduct rolitille maintenance 11or on-site contamination clue to or its effectiveness. Plant General Inspections,
equipment to ensure proper functioning the malfunction, failul-e. scheduled process and egUipnlent preventative
and prevent malfunctions or other or deterioration of oil- ilia intenance programs ensure SWPPP standards
maintenance issues that could lead to a site equipment. are maintained.
spill or inhibit the response to a spill.
Preventive maintenance: There is an To prevent stormwater 2023 Review: There is no change in this BMP
one"011140 preventive maintenance contamination due to or its effectiveness. Plant General Inspections
program in place which is in place to plan the malfunction. failure_ scheduled process and equipment preventative
in advance and replace equilinlent or or deterioration of on- maintenance programs ensure SWPPP standards
equipment components (such as site equipment. are maintained. The site also maintains critical
equipment. facility. vehicles. and storage spare equipment so that any issues that impact
tanks) prior to malfunction. BMP effectiveness can be addressed in a timely
fashion.
Manufacturer's recommendations: To prevent stornlwater 2023 Review: There is no chan`,e in this BMP
Personnel follow the manufacturer's contamination due to or its effectiveness. Process equipment is
recommended operating and the misuse of facility operated and maintained according to
maintenance procedures to the extent egUipnlent. nlanufactUrer recommendations wherever
practicable and allowed by the processes practical in order to avoid avoidable incidents
at the facility. that may impact BMP effectiveness. Any
change in equipment or Use is addressed though
the change management prograrn.
Response Materials: The facility is To ensure that 2023 Review: There is no change in this BMP
equipped with spill kits containing personnel can respond or its effectiveness. Tile RTP facility is staffed
equipment to respond to a spill of quickly to any spills to with a trained On-A[ert response Team
chemicals. prevent contaminated equipped with all necessary spill kits and
stormwater front containment materials to address leaks or spills
removing the site. that would potentially impact the site's SWPPP.
Roofing: Any areas where paint. aerosol To minimize exposure 2023 Review: There is no change in this BMP
cans. or other materials are stored are of potential pollutants to or its effectiveness. Paints and aerosol calls are
covered under a metal roof to prevent stormwater. stored Linder covered structures (bUildln�,,S or
exposure to stormwater. metal canopies) to prevent exposure to
stornlwater and site l-Linoffs that could
potentially impact the site's SWPPP.