NCS000462_Fact sheet binder_20231011

DEQ / DEMLR
FACT SHEET FOR NPDES INDUSTRIAL INDIVIDUAL
STORMWATER PERMIT DEVELOPMENT
Basic Information for Permit Issuance and Renewals:
Permit Writer/Date Brianna Young 10/9/2023
Permit Number NCS000462
Owner/Facility Name Matheson Tri-Gas, Inc./Matheson—Wake Forest
ASU
SIC(NAICS) Code/Category 2813 (325120)/Industrial gases(Industrial gas
manufacturing)
Basin Name/Sub-basin number Neuse/03-04-02
Receiving Stream/HUC UT to Smith Creek/030202010702
Stream Classification/Stream Segment C;NSW/27-23- 2
Is the stream impaired on 303 d list]? Yes; See Section 2 below
Any TMDLs? No
Any threatened and/or endangered species? No
Any compliance concerns? See Section 2 below
Any permit mods since lastpermit? No
New expiration date 10/31/2028
Comments on Draft Permit? See Section 6 below
Section 1. Facility Activities and Process:
The Matheson Tri-Gas, Inc. facility manufactures industrial gases by separating air into oxygen,
nitrogen, and argon through a distillation process. These gases are converted into cryogenic liquids.
Outfall SW001:
Drainage area consists of a fuel dispenser, a 10,000 gallon diesel tank, recycle compressor, cooling
tower, pump house, bulk storage tanks, compressor building (containing used oil tanks, drum storage, air
compressor), transformer, air expander, and liquefier.
Outfall SWO02:
Drainage area consists of a distribution storage shed, oil drum storage, and grassy area.
Why Industrial Sites with Stormwater are Subject to a Permit: Federal NPDES regulations define
stormwater discharge associated with industrial activity in 40 CFR §122.26 (b)(14) as: "the discharge
from any conveyance that is used for collecting and conveying storm water and that is directly related to
manufacturing,processing or raw materials storage areas at an industrial plant. The term does not
include discharges from facilities or activities excluded from the NPDES program under this part 122.
For the categories of industries identified in this section, the term includes,but is not limited to, storm
water [sic] discharges from industrial plant yards; immediate access roads and rail lines used or traveled
by carriers of raw materials, manufactured products, waste material, or byproducts used or created by
the facility; material handling sites; refuse sites; sites used for the application or disposal of process
waste waters (as defined at part 401 of this chapter); sites used for the storage and maintenance of
material handling equipment; sites used for residual treatment, storage, or disposal; shipping and
receiving areas; manufacturing buildings; storage areas (including tank farms) for raw materials, and
intermediate and final products; and areas where industrial activity has taken place in the past and
Page 1 of 5

significant materials remain and are exposed to storm water. For the purposes of this paragraph, material
handling activities include storage, loading and unloading,transportation, or conveyance of any raw
material, intermediate product, final product, byproduct or waste product. The term excludes areas
located on plant lands separate from the plant's industrial activities, such as office buildings and
accompanying parking lots as long as the drainage from the excluded areas is not mixed with storm
water [sic] drained from the above described areas."
Section 2. Monitoring Information and Compliance History:
• March 2015 to January 2023, benchmarks exceeded for:
o pH min not reached 1 time
o Monitoring data only provided for outfall SW001
• Monitoring for outfalls SW001 and SWO02 was provided for a single storm event in January
2023. Monitoring was conducted for total phosphorus, total nitrogen, and total kjeldahl nitrogen
(TKN). There were no exceedances of benchmarks for these three parameters.
303(d) listing:
The segment of Smith Creek the facility discharges to is impaired for turbidity. Immediately upstream,
Smith Creek is impaired for benthos.
Smith Creek ==1 27-23 (2)a QNSW 1.9 FIN Miles
13856 From dam at Wake Forest Reservoirto 0.3 miles downstream of Hatters Branch
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
Benthos(Nar,AL,FW) 1�jExceedirkg Criteria I Fair, Poor or Severe Biodassificatian 2012
Smith Creek 27-23 (2]b QNSW 3.9 FIN Miles
13857 From 0.3 miles downstream of Hatters Branch to Neuse River
PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR
urbidity(SD NTU,AL,FW miles) 1[5=11Exceeding Criteria I 2i322
Threatened/Endangered Species:
There are no threatened or endangered species in the vicinity of the discharge, however, the Regal
Darner(Coryphaeschna ingens; NC status: SR) is in the vicinity.
Section 3. Proposed Monitoring for Stormwater Discharges:
The Division considered potential pollutants from past and present industrial activities and data was
submitted for March 2015 to January 2023. Quantitative sampling included pH, TSS, and TPH.
Parameters are based on potential pollutants in the drainage area, sampling results, and in some cases,
dependent upon future activities (e.g., ash removal through the drainage area). Below is a table of the
proposed monitoring for each outfall at the Matheson Tri-Gas, Inc. site.
Page 2 of 5

Outfalls SWO01 and SWO02
Quarterly monitoring
Total Suspended Solids BASIS: Potential pollutant from drainage area and BMP effectiveness
(TSS) indicator.
Quarterly monitoring
pH BASIS: Pollutant indicator
Quarterly monitoring
Total Rainfall BASIS: Discharge potential indicator
Quarterly monitoring
Non-Polar Oil &Grease BASIS: Potential pollutant from lubricants; Method 1664 SGT-HEM
targets petroleum-based O&G
Quarterly monitoring
Monthly Oil Usage BASIS: Potential pollutant from drainage area
Stormwater Benchmarks and Tiered Response: Rather than limits,North Carolina NPDES
Stormwater permits contain benchmark concentrations. Stormwater benchmarks are numerical action
levels for stormwater monitoring. Benchmarks are not effluent limits, and benchmark exceedances are
not permit violations. Benchmarks provide facilities a tool for assessing the significance of pollutants in
stormwater discharges and the effectiveness of best management practices (BMPs). Benchmark
concentrations are intended as guidelines for the facility's development and implementation of the
Stormwater Pollution Prevention Plan (SWPPP).
Benchmark exceedances require the permittee to increase monitoring, increase management actions,
increase record keeping, and/or install stormwater BMPs in a tiered program. The permit establishes a
tiered approach to specify actions the permittee must take in response to analytical results above
benchmark concentrations. The tiered structure of the permit provides the permittee and DEMLR wide
flexibility to address issues that may arise with one or more parameters and/or outfalls.
Metals benchmarks are calculated to mimic acute water quality standards and with the guidance of
DWR. NC DWR follows established federal procedures for calculating acute standards when developing
the benchmarks. Just like the acute standards, metals benchmarks normally reflect one half of the
calculated Final Acute Value (the "1/2 FAV"). In most cases, translation into total recoverable values is
based on an assumed hardness of 25 mg/L and a total suspended solids (TSS) concentration of 10 mg/L.
Acute standards protect aquatic life from negative impacts of short-term exposure to higher levels of
chemicals where the discharge enters a waterbody. The Stormwater Permitting Program applies this
approach because of the ephemeral nature of rainfall events.
The Division may evaluate results to determine if a smaller suite of parameters for some outfalls is
adequate to characterize potential pollution or BMP effectiveness. For example, one or more metals or
other parameters may serve as an adequate tracer for the presence of ash pollution during disturbance or
ash removal in specific drainage areas at this site. For parameters that do not have a stormwater
benchmark, the Division may develop a benchmark value if appropriate toxicity data become available
or if rising trends in concentrations suggest a persistent source.
Page 3 of 5

A summary of the benchmarks in the draft permit, and their basis, is below:
Parameter Benchmark Basis
Total Suspended 100 mg/L National Urban Runoff Program(NURP) Study, 1983
Solids TSS
H 6 s.u. —9 s.u. NC Water Quality Standard(Range)
Non-Polar Oil & Review of other state's daily maximum benchmark
Grease 15 mg/L concentration for this more targeted O&G;NC WQS that
EPA Method 1664 does not allow oil sheen in waters
SGT-HEM
Stormwater Pollution Prevention Plan: The proposed permit conditions reflect the EPA and NC's
pollution prevention approach to stormwater permitting. The Division's maintains that implementation
of Best Management Practices (BMPs) and traditional stormwater management practices that control the
source of pollutants meets the definition of Best Available Technology (BAT) and Best Conventional
Pollutant Control Technology(BCT). The permit conditions are not numeric effluent limitations but are
designed to be flexible requirements for implementing site-specific plans to minimize and control
pollutants in stormwater discharges associated with the industrial activity. Title 40 Code of Federal
Regulations (CFR) §122.44(k)(2) authorizes the use of BMPs in lieu of numeric effluent limitations in
NPDES permits when the agency finds numeric effluent limitations to be infeasible. The agency may
also impose BMP requirements which are "reasonably necessary" to carry out the purposes of the Act
under the authority of 40 CFR 122.44(k)(3). The conditions proposed in this draft permit are included
under the authority of both of these regulatory provisions. In essence, the pollution prevention and BMP
requirements operate as limitations on effluent discharges that reflect the application of BAT/BCT.
Flexibility in Tier Responses: Tier Two actions provide an opportunity for the permittee to propose an
alternative monitoring plan for approval by the Region:
• Alternatively, in lieu of steps 2 and 3, the permittee may, after two consecutive exceedances,
exercise the option of contacting the DEMLR Regional Engineer as provided below in Tier
Three. The Regional Engineer may direct the response actions on the part of the permittee as
provided in Tier Three, including reduced or additional sampling parameters or frequency.
• If pursuing the alternative above after two consecutive exceedances, the permittee may propose
an alternative monitoring plan for approval by the Regional Engineer.
The permit therefore allows the permittee to petition the Regional Office for monitoring changes sooner
than Tier Three (upon any four benchmark exceedances) and gives guidance on one option to take. For
example, the permittee may request that mercury only be monitored semi-annually under the tiers, or
that only parameters over the benchmark be monitored more frequently. In this way, changes to the
monitoring scheme for any outfall could be handled outside of a permit modification.
Other Proposed Requirements:
• It is standard for Stormwater Pollution Prevention Plan(SWPPP) requirements to include an
annual certification that stormwater outfalls have been evaluated for the presence of non-
stormwater discharges, and if any are identified, how those discharges are permitted or otherwise
authorized.
• Requirement to submit a request for permit modification if the facility identifies or creates any
new outfalls, removes outfalls, or alters any drainage area that changes potential pollutants.
• The Division expects the permittee to apply best professional judgment and consider the safety
of its personnel in fulfilling sampling obligations under the permit.
Page 4 of 5

• Federal regulations require electronic submittal of all discharge monitoring reports (DMRs). If a
state does not establish a system to receive such submittals, then permittees must submit DMRs
electronically to the EPA.
• Quarterly QualitativeNisual Monitoring to assure regular observation of outfalls throughout
year.
Section 4. Changes from previous permit to draft:
• Monitoring increased from semi-annually to quarterly for all parameters (qualitative and
quantitative)
• "No discharge" clarifications made
• eDMR requirement added
• Feasibility study removed per programmatic updates
• Boilerplate language moved into body of the permit; boilerplate no longer attached
• Facility name updated on permit cover sheet per renewal application
• Analytical monitoring for TSS,pH, total rainfall, non-polar O&G, and monthly oil usage added
for all outfalls as these are standard monitoring requirements for all individual stormwater
permits
o Previous permit only had monitoring required for vehicle maintenance areas
• Benchmarks updated for parameters per guidance from DWR Standards group on stormwater
benchmarks
Section 5. Changes from draft to final:
• None
Section 6. Discussions with the Facility and Regional Office:
• Initial contact with facility: 9/8/2022
• Initial contact with Regional Office: 2/17/2023
• Draft sent to CO peer review: N/A
• Draft sent to Regional Office: 8/30/2023
• Final permit sent for supervisor signature: N/A
Section 7. Comments received on draft permit:
• None
Page 5 of 5

Beaufort Gznratte The Herald-Rot:k KII el Nue,00 Herald-Miami Sun Nevvs-Myrtle Beach
Bellev-ille HerMcl Sun-Durham Modesto Bee The News Tribune Tacoma
Wlingharn Herald Idaho Statesman Raleigh Nevvs 4%
Obss,oer The Telegraph-Macon
Bradenton Herald Island Packet The Olympian San Lus Obispo Tribune
CULATCHY Contra Daily Times Kansas City Star Sacramento Bee Tri-CAty Harald
Charlotte Oloser,ver Lexington HaFald-Leader Fort Worth Star-Telegiram Wichita Eagle
Columbus Ledger-Enquiner MercedSun-Star The State-Columbia
Fresno Bee Miami Herald Sun Harald-BrIoxi
AFFIDAVIT OF PUBLICATION
Account/ Order Number Identlfkadon Order PO Amount Cols Depth
38106 4066 MitLegalAd• 11.0138f780-IPL013M $2818 2 1 26L
Atterift: Joyce Sanford Clark STATE OF NORTH CAROLINA
NC DENR ENGERGY MINERAL&LAND RESOURCES ; COUNTY OF WW COUNTY OF DURN
1612 MAIL SERVICE CENTER ; Before the undersigned,a Notary Public of Dallas
RALEIGH,NC 276991612 County,Texas,duly commissioned and authorized to
administer oaths,affirmations,etc.,personally
[e-mail] appeared Tara Pennington,who being duly sworn or
affirmed,according to law,doth depose and say that he
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION or she is Accounts Receivable Specialist of the News&
INTENT TO ISSUE Observer Publishing Company,a corporation organized
NPDES STOfA1WATER DISCHARGE PERMITS and doing business under the Laws of the State of North
The North Carolina Environmental Management Commission proposes to issue
NPDES stormwater discharge parnit(s) to the persons) listed below. Public ; Carolina,and publishing a newspaper known as The
comment or objection to the draft permits Is Invited,Written comments regarding News&Observer,Wake and State aforesaid,the said
the proposed permit will be accepted mill 30 days alter the publish date of this
notice and considered In the final detemniratlon regarding permit Issuance and ; newspaper in which such notice,paper,document,or
permit provisions.
Director of the C Division
of Energy, A I,and Land
Reues(DEMI )my hold a publc hearing should thent be significant legal advertisement was published was.at the time of
degree of public Interest.Please mall comments and/or Information requests to each and every such publication.a newspaper meeting
DEMLA at 1612 Mall Service Center,Raleigh,NG 27699-1612. ; all of the requirements and qualifications of Section 1-
• Matheson TdGas,Inc.11700 Scepter Road,WavertA TN 37165]has re- 597 of the General Statutes of North Carolina and was a
ASUacnlrety In WWl of akke CCotmN.mhasfaciliy lei harg loan unnnaam�inhu ? qualified newspaper within the meaning of Section 1-597
ary to Smith Greek In the Neuse River Basin. of the General Statutes of North Carolina,and that as
Interested persons may visit DEK"at 512 N.Salisbury Street,Raleigh,NC ; such he or she makes this affidavit and is familiar with
27604 to review Information on file.Additional Information on NPDES permits the books,files and business of said corporation and by
and this notice may be found on our websta:Mlpsl/deq.nc.gw/about/dNi- ; reference sions/energy mine "nd-land-mmumes/sto rater/stommater- program/ rencetoeesof saidpublication the attached
stomlwater-publicnotices,or by contacting Brianne,Yong at brlanna.young® ; advertisement for NC DENR ENGERGY MINERAL&LAND
eorsts7o7a647.IP-01 RESOURCES was inserted in the aforesaid newspaper on
Sep 62023 ; dates as follows:
1 insertion(s)published on:
09/06/23
I certify ordeclare)under penaTfici perjury that t e
�A foregoing is true and correct.
Notary Publicinand for the stateo Texas,residing in
Dallas County
STEPHANIE HATCHER
:p
_•� My Notary ID#133sua
.,,ter*,• EDgllras January 14,2028
Ex74Bargefor worduplicate affidavits.
Legal doarment please do not destroyl

Young, Brianna A
From: Murphree,James <[e-mail]>
Sent: Tuesday, February 28, 2023 11:48 AM
To: Young, Brianna A
Subject: RE: [External] Matheson - Wake Forest ASU - Permit NCS000462
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
This is the correct name for the facility: Matheson—Wake Forest ASU
Matheson Tri-Gas, Inc. is the legal company name.
Thanks,
James Murphree
Director Environmental Compliance
MATHESON
1700 Scepter Road
Waverly, TN 37185
Office: 931-296-8151
0murphree(a�mathesonclas.com
www.mathesongas.com
From:Young, Brianna A<[e-mail]>
Sent:Tuesday, February 28, 2023 10:46 AM
To: Murphree,James<[e-mail]>
Subject: RE: [External] Matheson -Wake Forest ASU - Permit NCS000462
Good morning James,
I have been reviewing the information you provided and had a follow-up question. Is the facility name "Matheson Tri-
Gas, Inc.", "Matheson—Wake Forest ASU", or"Wake Forest ASU"?The name is different on different paperwork in our
files.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
1

Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Please check with the appropriate staff before visiting our offices,
as we may be able to handle your requests by phone or email.We appreciate your patience as we continue to serve the public
during this challenging time.
From:Young, Brianna A
Sent: Friday, February 17, 2023 10:12 AM
To: Murphree,James<[e-mail]>
Subject: RE: [External] Matheson -Wake Forest ASU - Permit NCS000462
Good morning,
Thank you for providing this information. I will reach out with any questions once I've had a chance to review
everything.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Please check with the appropriate staff before visiting our offices,
as we may be able to handle your requests by phone or email.We appreciate your patience as we continue to serve the public
during this challenging time.
From: Murphree,James<[e-mail]>
Sent: Friday, February 17, 2023 9:54 AM
To:Young, Brianna A<[e-mail]>
Subject: [External] Matheson -Wake Forest ASU - Permit NCS000462
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Ms. Young,
Attached are the requested forms and electronic data spreadsheet to complete the Matheson Tri-Gas, Inc.—Wake
Forest(NCS000462) application.Additionally, below is the requested summary information.
• Description of industrial activity in each drainage area.
o Drainage Area 1- Production of cryogenic liquids.
2

o Drainage Area 2- Distribution storage shed and oil storage.
• SIC and NAICS code: 2813 and 32S120
• The requested renewal applications submitted in 2017 and currently are complete and correct.
• There have been no operational changes since the renewal application was submitted.
• Ms. Bethany Georgoulias has been emailed to update the Outfall 002 information on the NCDENR Stormwater
summary report.
Let me know if you need anything additional. Sorry for the delay as we had issues with the coordination of the sample
collection.
Thank you,
James Murphree
Director Environmental Compliance
MATHESON
1700 Scepter Road
Waverly, TN 37185
Office: 931-296-8151
imurphree(cDmathesongas.com
www.mathesonaas.com
3

Young, Brianna A
From: Murphree,James <[e-mail]>
Sent: Friday, February 17, 2023 9:54 AM
To: Young, Brianna A
Subject: [External] Matheson - Wake Forest ASU - Permit NCS000462
Attachments: 2016-2023 Lab Data.pdf, 2023 - MTG - Wake Forest ASU - Permit Renewal.pdf
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
Ms. Young,
Attached are the requested forms and electronic data spreadsheet to complete the Matheson Tri-Gas, Inc.—Wake
Forest(NCS000462) application.Additionally, below is the requested summary information.
• Description of industrial activity in each drainage area.
o Drainage Area 1- Production of cryogenic liquids.
o Drainage Area 2- Distribution storage shed and oil storage.
• SIC and NAICS code: 2813 and 32S120
• The requested renewal applications submitted in 2017 and currently are complete and correct.
• There have been no operational changes since the renewal application was submitted.
• Ms. Bethany Georgoulias has been emailed to update the Outfall 002 information on the NCDENR Stormwater
summary report.
Let me know if you need anything additional. Sorry for the delay as we had issues with the coordination of the sample
collection.
Thank you,
James Murphree
Director Environmental Compliance
MATHESON
1700 Scepter Road
Waverly, TN 37185
Office: 931-296-8151
0murphree(a�mathesonclas.com
www.mathesongas.com
1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
Form U.S.Environmental Protection Agency
I \= EPA Application for NPDES Permit to Discharge Wastewater
NPDES GENERAL INFORMATION
SECTION • •D i
1.1 Applicants Not Required to Submit Form 1
Is the facility a new or existing publicly owned Is the facility a new or existing treatment works
1.1.1 treatment works? 1.1.2 treating domestic sewage?
If yes,STOP.Do NOT complete No If yes,STOP.Do NOT No
Form 1.Complete Form 2A. complete Form 1.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
a production facility? currently discharging process wastewater?
oYes 4 Complete Form 1 No Yes 4 Complete Form No
n and Form 2B. 1 and Form 2C.
z
r- 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
commenced to discharge? discharges only nonprocess wastewater?
❑ Yes 4 Complete Form 1 No Yes 4 Complete Form No
o: and Form 2D. 1 and Form 2E.
1.2.5 Is the facility a new or existing facility whose
'— discharge is composed entirely of stormwater
a associated with industrial activity or whose
discharge is composed of both stormwater and
non-stormwater?
Yes 4 Complete Form 1 No
and Form 2F
unless exempted by
40 CFR
122.26(b)(14)(x)or
b 15 .
SECTIONADDRESS,AND LOCATIONi
2.1 Facility Name
Matheson-Wake Forest ASU
0 2.2 EPA Identification Number
0 110025202723
J
2.3 Facility Contact
d Name(first and last) Title Phone number
James Murphree Director of Environmental Compliance [phone]
Q
=cc
Email address
[e-mail]
2
4i 2.4 Facility Mailing Address
zStreet or P.O.box
326 Forestville Road
City or town State ZIP code
Wake Forest NC 27587
EPA Form 3510-1(revised 3-19) Pagel

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
y 2.5 Facility Location
wStreet,route number,or other specific identifier
a 0 326 Forestville Road
a�
c County name County code(if known)
Wake 092
0
£ City or town State ZIP code
z Wake Forest NC 27587
SECTION1 NAICS CODES1
3.1 SIC Code(s) Description(optional)
2813 Industrial Gases
y
d
0
O
V
N
V
z 3.2 NAICS Code(s) Description(optional)
c
16 325120 Industrial Gas Manufacturing
t�
rn
4.1 Name of Operator
Matheson Tri-Gas,Inc.
`o_ 4.2 Is the name you listed in Item 4.1 also the owner?
w
n:
o El Yes El No
4.3 Operator Status
0
❑ Public—federal ❑ Public—state ❑Other public(specify)
o ❑ Private 0 Other(specify) Corporate
4.4 Phone Number of Operator
[phone]
0 4.5 Operator Address
w
Street or P.O.Box
E m 3 Mountainview Road,3rd Floor
c w City or town State ZIP code
0 0 Warren NJ 07059
a Email address of operator
O [e-mail]
SECTION
= 5.1 Is the facility located on Indian Land?
_j ❑Yes ❑✓ No
EPA Form 3510-1(revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
SECTION •• 1
6.1 Existing Environmental Permits(check all that apply and print or type the corresponding permit number for each)
d ❑ NPDES(discharges to surface ❑ RCRA(hazardous wastes) ❑ UIC(underground injection of
c water) fluids)
may—' NCS000462
> E
W a ❑ PSD(air emissions) ❑ Nonattainment program(CAA) ❑ NESHAPs(CAA)
a�
x ❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section 404) ❑✓ Other(specify)
Industrial Pre-treatment
SECTIONA' 41
7.1 Have you attached a topographic map containing all required information to this application?(See instructions for
C specific requirements.)
❑✓ Yes ❑ No ❑CAFO—Not Applicable(See requirements in Form 2B.)
SECTIONOF 1
8.1 Describe the nature of your business.
The plant separates air into its principal constituents:oxygen,nitrogen,and argon through a distillation process.
(n
to
G1
C
y
7
co
O
3
l�0
Z
SECTION ' COOLING WATER INTAKE STRUCTURES(40
9.1 Does your facility use cooling water?
❑ Yes ❑✓ No+SKIP to Item 10.1.
o 9.2 Identify the source of cooling water.(Note that facilities that use a cooling water intake structure as described at
a,2 40 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 Y
v City of Raleigh
c
SECTION
I VARIANCE REQUESTS1 I
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
y apply.Consult with your NPDES permitting authority to determine what information needs to be submitted and
when.)
d ❑ 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))
❑✓ Not applicable
EPA Form 3510-1(revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
SECTION • I
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
❑✓ Section 1:Activities Requiring an NPDES Permit ❑ w/attachments
❑✓ Section 2:Name, Mailing Address,and Location ❑ w/attachments
❑✓ Section 3:SIC Codes ❑ wl attachments
❑✓ Section 4:Operator Information ❑ w/attachments
❑✓ Section 5:Indian Land ❑ w/attachments
c
❑✓ Section 6:Existing Environmental Permits ❑ w/attachments
m
E w/topographic
❑✓ Section 7:Map ❑ ma ❑ w/additional attachments
w
o ❑✓ Section 8:Nature of Business ❑ w/attachments
w ❑✓ Section 9:Cooling Water Intake Structures ❑ wl attachments
4)
�' ❑✓ Section 10:Variance Requests ❑ w/attachments
-v
c
y ❑✓ Section 11:Checklist and Certification Statement ❑ w/attachments
Y
11.2 Certification Statement
c.�
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision
in accordance with a system designed to assure that qualified personnel properly gather and evaluate the
information submitted.Based on my inquiry of the person or persons who manage the system,or those persons
directly responsible for gathering the information, the information submitted is,to the best of my 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
James Murphree Director of Environmental Compliance
Signature Date signed D,� // ( l`
2-
EPA Form 3510-1(revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
Form U.S Environmental Protection Agency
2F \.EPA Application for NPDES Permit to Discharge Wastewater
NPDES STORMWATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY
SECTIONOUTFALL LOCATIONr
1.1 Provide information on each of the facilit 's outfalls in the table below
Outfall Receiving Water Name Latitude Longitude
Number
001 Smith Creek 35° 57' 13.0" N 78° 31' 2.0" W
c
0
002 Smith Creek 35° 57' 11.5'r N 78° 31' 7.2" W
0
J
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0 0 o r
o r ++ o r ++
o r +r o + ++
SECTION • ( CFR 122.21(g)(6))
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 4 SKIP to Section 3.
2.2 Briefly identify each applicable project in the table below.
Brief Identification and Affected Ouffalls Source(s)of Discharge Final Compliance Dates
Description of Project (list outfall numbers)
Required Projected
w
c
m
E
0
a
E
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 3510-2F(Revised 3-19) Pagel

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest AS U OMB No.2040-0004
SECTION1'A I
a� 3.1 Have you attached a site drainage map containing all required information to this application?(See instructions for
c CL A specific guidance.)
W •` M
o ® Yes ❑ No
SECTIONPOLLUTANT SOURCESt
4.1 Provide information on the facility's pollutant sources in the table below.
Outfall Impervious Surface Area Total Surface Area Drained
Number (within a mile radius of the facility) (within a mile radius of the facility)
specify units specify units
001 Drainage area 1 6S% 9.23 acres
specify units specify units
002 Drainage area 2 5% 4.17 acres
specify units specify units
specify units specify units
specify units specify units
specify units specify units
4.2 Provide a narrative description of the facility's significant material in the space below.(See instructions for content
requirements.)
Outfall 001 drainage area contains a 10,000-gal diesel tank and fuel dispenser,cooling tower,product containers,and
oil bearing process equipment.
0
0
y Outfall 002 drainage area contains some drum storage.
c
m
No significant materials have been treated,stored,or disposed of at the site.
0
a
Herbicides are sprayed by a licensed contractor,in gravel areas,approximately twice a year for weed control.
4.3 Provide the location and a description of existing structural and non-structural control measures to reduce pollutants in
stormwater runoff. See instructions fors specificguidance.)
Stormwater Treatment
Codes
Outfall from
Number Control Measures and Treatment Exhibit
2F-1
list
001 No Treament or Control Measures
002 No Treatment or Control Measures
EPA Form 3510-2F(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
SECTION •N STORMWATER I 41
5.1 1 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 title
James Murphree Director of Environmental Compliance
Signature Date signed
N
21 5.2 Provide the testing information requested in the table below.
Onsite Drainage Points
Outfall Description of Testing Method Used Date(s)of Testing Directly Observed
c Number
During Test
d
A
001 Visual 01/03/2022 Yes
0
N
002 Visual 01/03/2022 Yes
0
z
SECTION
OR
6.1 Describe any significant leaks or spills of toxic or hazardous pollutants in the last three years.
N
.Q None.
`0
Y
R
J
C
R
C1
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C
N
SECTIONDISCHARGE INFORMATION41
See the instructions to determine the pollutants and parameters you are required to monitor and,in turn,the tables you must
o complete.Not all applicants need to complete each table.
7.1 Is this a new source or new discharge?
❑ Yes 4 See instructions regarding submission of ❑✓ No 4 See instructions regarding submission of
estimated data. actual data.
Tables A,B,C,and D
y 7.2 Have you completed Table A for each outfall?
o ❑✓ Yes ❑ No
EPA Form 3510-2F(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
7.3 Is the facility subject to an effluent limitation guideline(ELG)or effluent limitations in an NPDES permit for its process
wastewater?
❑ Yes ✓❑ 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 ❑ No
7.5 Do you know or have reason to believe any pollutants in Exhibit 2F-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 ❑ No
7.7 Do you qualify for a small business exemption under the criteria specified in the Instructions?
❑ Yes 4SKIP 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?
❑ Yes ❑✓ No 4 SKIP to Item 7.10.
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
Table C?
o ❑ Yes ❑ No
U
0 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.
0
7.11 Have you provided quantitative data in Table C for those pollutants in Exhibit 2F-3 that you expect to be discharged in
rn concentrations of 10 ppb or greater?
h ❑ Yes ❑ No
7.12 Do you expect acrolein,acrylonitrile,2,4-dinitrophenol,or 2-methyl-4,6-dinitrophenol to be discharged in concentrations
of 100 ppb or greater?
❑ Yes ❑✓ 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 ❑ No
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 ❑✓ No
7.15 Do you know or have reason to believe any pollutants in Exhibit 2F-4 are present in the discharge?
❑ Yes ❑✓ No 4 SKIP to Item 7.17.
7.16 Have you listed pollutants in Exhibit 2F-4 that you know or believe to be present in the discharge and provided an
explanation in Table C?
❑ Yes ❑ No
7.17 Have you provided information for the storm event(s)sampled in Table D?
❑✓ Yes ❑ No
EPA Form 3510-2F(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
a Used or Manufactured Toxics
7.18 Is any pollutant listed on Exhibits 2F-2 through 2F-4 a substance or a component of a substance used or
manufactured as an intermediate or final product or byproduct?
0
❑ Yes ❑✓ No SKIP to Section 8.
0
7.19 List the pollutants below,including TCDD if applicable.
1. 4. 7.
d
s
2. 5. 8.
c 3. 6. 9.
SECTION 8. BIOLOGICAL TOXICITY TESTING DATA(40 CFR 122.21(g)(11))
8.1 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on
any of your discharges or on a receiving water in relation to your discharge within the last three years?
c
0' ❑ Yes ✓❑ No 4 SKIP to Section 9.
_
w
t/!
8.2 Identify the tests and their purposes below.
Test(s) Purpose of Test(s) Submitted to NPDES Date Submitted
K Permitting Authority?
0
~ ❑ Yes ❑ No
�a
c0 ElYes ElNo
'Itn
❑ Yes ❑ No
SECTION • •• • t
9.1 Were any of the analyses reported in Section 7(on Tables A through C)performed by a contract laboratory or
consulting firm?
❑✓ Yes ❑ No 4 SKIP to Section 10.
9.2 Provide information for each contract laboratory or consulting firm below.
Laboratory Number 1 Laboratory Number 2 Laboratory Number 3
Name of laboratory/firm
Pace Analytical Services,Inc.
c
0
0
Laboratory address
•2 9800 Kincey Avenue,Suite 100
Huntersville,NC 28078
tv
_
Q
r,
2
c Phone number
V [phone]
Pollutant(s)analyzed TKN
Phosphorus,Total
Nitrogen,Total
Temperature
pH
Oil and Grease/TPH
Tss
EPA Form 3510-2F(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110025202723 NCS000462 Matheson-Wake Forest ASU OMB No.2040-0004
SECTIONI CHECKLIST AND CERTIFICATION STATEMENT(40
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.
Column 1 Column 2
❑✓ Section 1 ❑ w/attachments(e.g., responses for additional outfalls)
❑✓ Section 2 ❑ w/attachments
✓❑ Section 3 ❑ w/site drainage map
✓❑ Section 4 ❑ w/attachments
✓❑ Section 5 ❑ w/attachments
❑✓ Section 6 ❑ w/attachments
d ✓❑ Section 7 ✓❑ Table A ❑ wl small business exemption request
is
c ❑ Table B ❑ w/analytical results as an attachment
❑ Table C ❑ Table D
a
❑✓ Section 8 ❑ w/attachments
c
y ❑✓ Section 9 ❑ w/attachments(e.g.,responses for additional contact laboratories or firms)
Y
❑✓ Section 10 ❑
10.2
Certification Statement
/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 fine
and imprisonment for knowing violations.
Name(print or type first and last name) Official title
James Murphree Director of Environmental Compliance
Signature Date signed
i
EPA Form 3510-2F(Revised 3-19) Page 6

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MONITORING
PERIOD
pH TPH TSS
UNITS STD (mg/L) (mg/L)
BENCHMARK 6-9 15 100
FREQUENCY semi annual semi annual semi annual
Outfall 001
June 1, 2016-Nov 30, 2016 6.9 <5.0 <5.1
Dec 1, 2016-May 31, 2017
June 1, 2017-Nov 30, 2017 6.9 <5.0 <2.5
Dec 1, 2017-May 31, 2018 6.4 <5.0 16.5
June 1, 2018-Nov 30, 2018 6.9 <5.0 <2.8
Dec 1, 2018-May 31, 2019 6.9 <4.8 <2.6
June 1, 2019-Nov 30, 2019 5.8 <4.9 8.8
Dec 1, 2019-May 31, 2020
June 1, 2020-Nov 30, 2020 8.2 <5.0 5.7
Dec 1, 2020-May 31, 2021
June 1, 2021-Nov 30, 2021 6.2 <5.0 <2.5
Dec 1, 2021-May 31, 2022 6 <4.8 3.4
June 1, 2022-Nov 30, 2022 <4.8 7.2
January 17, 2023 7.1 - -

Young, Brianna A
From: Young, Brianna A
Sent: Friday, January 27, 2023 2:14 PM
To: Murphree,James
Subject: RE: [External] RE: Matheson Tri-Gas, Inc. (NCS000462) stormwater permit renewal
Good afternoon,
I am following up on our previous correspondence.To date I have not received the requested information.This
information is required in order to proceed with reviewing the permit renewal application. Please let me know if you
have any questions.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
INC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Please check with the appropriate staff before visiting our offices,
as we may be able to handle your requests by phone or email.We appreciate your patience as we continue to serve the public
during this challenging time.
From: Murphree,James<[e-mail]>
Sent:Wednesday, November 9, 2022 10:36 AM
To:Young, Brianna A<[e-mail]>
Subject: RE: [External] RE: Matheson Tri-Gas, Inc. (NCS000462) stormwater permit renewal
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspicious email as an attachment to
Report Spam.
We are sorting through this now. We should have your information in the next few days.
James Murphree
Director Environmental Compliance
MATHESON
1700 Scepter Road
Waverly, TN 37185
Office: 931-296-8151
jmurphree(a�mathesongas.com
1

www.mathesongas.com
From:Young, Brianna A<[e-mail]>
Sent:Wednesday, November 9, 2022 9:34 AM
To: Murphree,James<[e-mail]>
Subject: RE: [External] RE: Matheson Tri-Gas, Inc. (NCS000462) stormwater permit renewal
Good morning,
I am following up again on our previous correspondence regarding requested information on the NCS000462
stormwater permit renewal.To date I have not received the requested information. Please provide the requested
information as soon as possible.This information is required in order to move forward with the permit renewal. Please
let me know if you have any questions on the information request.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Please check with the appropriate staff before visiting our offices,
as we may be able to handle your requests by phone or email.We appreciate your patience as we continue to serve the public
during this challenging time.
From:Young, Brianna A
Sent:Thursday, October 6, 2022 2:12 PM
To: Murphree,James<[e-mail]>
Subject: RE: [External] RE: Matheson Tri-Gas, Inc. (NCS000462) stormwater permit renewal
Good afternoon,
The renewal application we received is attached. Please let me know if you have any questions as you work through the
information request.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
2

[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Please check with the appropriate staff before visiting our offices,
as we may be able to handle your requests by phone or email.We appreciate your patience as we continue to serve the public
during this challenging time.
From: Murphree,James<[e-mail]>
Sent: Wednesday, October 5, 2022 3:01 PM
To:Young, Brianna A<[e-mail]>
Subject: [External] RE: Matheson Tri-Gas, Inc. (NCS000462) stormwater permit renewal
CAUTION: External email. Do not click links or open attachments unless you verify.Send all suspGicious email as an attachment to
Report Spam.
Can you send me what you have? I thought we had submitted all the required documentation. This will help me with
the gaps.
From: Bennett, Bradley<brad ley.ben [e-mail]>
Sent: Wednesday,July 25, 2018 8:53 AM
To:Andy Nunnery<[e-mail]>
Subject: RE: [External] Matheson Tri-Gas NCS000462
Andy,
As we discussed earlier today the Matheson Tri-Gas facility has made their renewal application to NCDEMLR and we do
have the application in-house. We currently have a pretty large backlog of individual permit renewals in-house and we
have not yet started on this renewal. In the interim the facility continues to be covered by their by their previous permit
and they should abide by those permit conditions.
If you have any other questions please feel free to call (Note new phone number below)
Bradley Bennett
Stormwater Program
NC Division of Energy, Mineral&Land Resources Phone: [phone] *-Please Note New Phone Number
512 N.Salisbury Street Fax: [phone]
1612 Mail Service Center Email: brad ley.bennett([e-mail]
Raleigh, NC 27699-1612
Email correspondence to and from this address may be subject to public records laws
Thank you,
James Murphree
Director Environmental Compliance
3

MATHESON
1700 Scepter Road
Waverly, TN 37185
Office: 931-296-8151
imurphree(cDmathesongas.com
www.mathesongas.com
From:Young, Brianna A<[e-mail]>
Sent: Wednesday, October 5, 2022 10:56 AM
To: Murphree,James<[e-mail]>
Subject: RE: Matheson Tri-Gas, Inc. (NCS000462)stormwater permit renewal
Caution: This Email is from an EXTERNAL source.Ensure you trust this sender before clicking on any links or attachments.
Good afternoon,
I am following up on my previous email as I have not received any response yet. Please provide the requested
information as soon as possible.This information is required in order to move forward with the permit renewal.
Thank you,
Brianna Young, MS(she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Permitting Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Please check with the appropriate staff before visiting our offices,
as we may be able to handle your requests by phone or email.We appreciate your patience as we continue to serve the public
during this challenging time.
From:Young, Brianna A
Sent:Thursday,September 8, 2022 3:35 PM
To: [e-mail]
Subject: Matheson Tri-Gas, Inc. (NCS000462) stormwater permit renewal
Good afternoon,
I am working on renewing the individual stormwater permit for Matheson Tri-Gas, Inc. (NCS000462). I need
additional information in order to 1) confirm that the information I have is correct and 2) make sure the permit
adequately serves the needs of the facility. Please provide the following:
4

• Please submit the renewal application. The supplemental material was submitted; however, the
primary permit renewal application was not. Please follow the instructions on our website here under the
"Renew an Existing Individual Permit"heading to submit the appropriate application forms.
• Description of industrial activity in each drainage area;
• SIC (NAICS) code;
• An electronic spreadsheet summarizing all of the monitoring data that has been collected since the
effective date of the current permit;
• Verification that the information in the renewal application is still complete and correct; and
• An explanation of any operational changes since the renewal application was submitted.
Enter your stormwater permit number into the Stormwater Permit Summary Report and you will see a form that
includes the address of the facility, contact information for the permit, and the regulated stormwater outfall(s)for the
facility. Please review the facility information to make sure it is correct. Information can be updated using the links
provided below, where applicable:
• Facility/Company name or ownership: Name/Ownership Change Form
• Owner Affiliation (Legally responsible person; i.e., someone with the company who is designated to
represent the company per signatory requirements or another authorized representative): Permit Contact
Update Request Form
• Delegation of Signature Authority (DOSA): Permit Contact Update Request Form
• Billing contact: Permit Contact Update Request Form
• Permit contact: Permit Contact Update Request Form
• Facility contact: Permit Contact Update Request Form
• Facility address only: Email Bethany og ulias
• Stormwater outfall information: Email Bethany Georgoulias
• Visit the eDMR Six Steps website and complete Steps 1 and 2.
• Pay outstanding permit fees: Stormwater ePUment website
Once I have the above listed information, I can continue my review. You will receive a draft permit for a 30-day
comment period. During this time we will be able to address any comments or concerns you have. During the
same 30-day period, the draft will be sent to a Regional Office staff member for review as well as out to public
notice. Once all comments and concerns are addressed, you may be issued a final permit.
Please contact me if you have any questions.
Thank you,
Brianna Young, MS (she/her/hers)
Industrial Individual Permits Coordinator
Stormwater Program
NC DEQ/Division of Energy, Mineral, and Land Resources (DEMLR)
[e-mail](e-mail preferred)
919-707-3647 (office)
Mailing address: 1612 Mail Service Center, Raleigh, NC 27699-1612
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
5

Based on the current guidance to minimize the spread of COVID-19,the Department of Environmental Quality has adjusted
operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts.
Please check with the appropriate staff before visiting our offices,as we may be able to handle your requests by phone or email.We
appreciate your patience as we continue to serve the public during this challenging time.
6

2/17/23, 1:03 PM North Carolina Secretary of State Search Results
• File an Annual Report/Amend an Annual Report • Upload a PDF Filing • Order a Document Online -
Add Entity to My Email Notification List • View Filings • Print a Pre-Populated Annual Report form • Print
an Amended a Annual Report form
Business Corporation
Legal Name
Matheson Tri-Gas, Inc.
Prev Legal Name
TRI-GAS INC.
Information
Sosld: 0496950
Status: Current-Active O
Date Formed: 6/16/1999
Citizenship: Foreign
State of Incorporation: DE
Fiscal Month: March
Annual Report Due Date: July 15th
Currentgnnual Report Status:
Registered Agent: CT Corporation System
Addresses
https://www.sosnc.gov/online_services/Search/Business_Registration_profile?ld=4968262 1/2

2/17/23, 1:03 PM North Carolina Secretary of State Search Results
Reg Office Reg Mailing Mailing
160 Mine Lake Ct Ste 200 160 Mine Lake Ct Ste 200 3 Mountainview Road Third Floor
Raleigh, NC 27615-6417 Raleigh, NC 27615-6417 Warren, NJ 07059
Principal Office
909 Lake Carolyn Parkway, Suite 1300
Irving, NJ 75039
Officers
Chief Financial Officer Chairman Assistant Secretary
Steve Foster Thomas S. Kallman John B. Molnar
909 Lake Carolyn Parkway 909 Carolyn Parkway 3 Mountainview Road Third Floor
Irving TX 75039 Irving TX 75039 Warren NJ 07059
Senior Vice President President
Yoshiyuki Niwa Michael Sinicropi
1-3-26 Koyama 909 Lake Carolyn Parkway, Suite 1300
Shinagawa-ku XX 142-8558 Irving TX 75039
Secretary Treasurer
Stephen I. Stroud Yosuke Yotsumoto
3 Mountainview Road Third floor 909 Lake Carolyn Parkway, Suite 1300
Warren NJ 07059 Irving TX 75039
Stock
https://www.sosnc.gov/online_services/Search/Business_Registration_profile?ld=4968262 2/2

M5 -'Pet—
(01 ► ��- ) 7
MATHESON 1700 Scepter Road
ask...The Gas Professionals" Waverly,TN 37185
Tel:[phone]
[e-mail]
May 30, 2017
SW Individual Permit Coverage Renewal
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612 RECEIVED
MAY 3 0 2017
RE: Stormwater Individual Permit Coverage Renewal DENR-LAND QUALITY
Permit No. NCS000462 STORMWATERPERmTTmo
To Whom It May Concern,
Please find attached the National Pollutant Discharge Elimination System (NPDES) Stormwater Individual
Permit Coverage Renewal Form for the Matheson Tri-Gas, Inc. (Matheson) facility that is located at 326
Forestville Road, Wake Forest, Wake County, North Carolina.
Matheson acquired the facility on September 9, 2016 and requested that the stormwater permit be transferred
on August 11, 2016. At the time of acquisition, Matheson believed that the permit renewal application,
which was due May 30, 2016, had already been submitted. The omission in the renewal submittal was not
identified until Matheson requested a permit status update from the facility on May 15, 2017. Matheson has
prepared the attached application once the problem was identified.
Please do not hesitate to contact me if you have any questions or concerns either via electronic mail at
[e-mail] or by telephone at 931-296-8151.
Regards, fl
n y,� M "
James Murphree, Corporate Director of Environmental Compliance
Matheson Tri-Gas, Inc.
Attachments
A Taiyo Nippon Sanso Group Company

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
I. 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 tab reports.
The summary can consist of a table including such items as outfall number,
parameters sampled, lab results, date sampled, and storm event data.
�-9✓�! 3. A summary of the Visual Monitoring results. Do not submit individual monitoring
/✓J reports. The summary can consist of a table including such items as outfall number,
parameters surveyed, observations, and date monitoring conducted.
X/W1 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
1� 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.
6. Certification of the development and implementation of a Stormwater Pollution
JPrevention 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)

ATTACHMENT 1
SITE DIAGRAM

10,000 gal Diesel Tank
D'spenser
�i
w
Drainage Area I
ribution Office /
o pervious Pump House,Bulk Storage Tanks
Dista
Recycle Compressor
Distribution Storage Shed Cooling Tower
Drum Storage
Used Oil Tank
Drum Storage
i
Approximate Property Boundary x. '� Main Air Compressor
y�y Compressor Building
J
�¢ Transformer
Air G�pander
KEY
r Liquefier Storm Sewer
Ou[fall 002 ■ Storm Drain
Spill Response Materials
--- Drainage Area
-� Outfall 001 L'Stormwater Flow Directions
■Oil-filled equipment
yam.,
a Bulk Oil Storage
Impervious Areas
CLIENT:Meaiewn Tri-Gas Inc.
LOCATION:Wake Forest NC SITE DIAGRAM
PROJECT/FILE:122152/33
Wake Forest, NC Facility
AquAeTer optimizing resources water, air, earth

ATTACHMENT 2
ANALYTICAL MONITORING DATA SUMMARY

TABLE 1. SUMMARY OF ANALYTICAL RESULTS
Wake Forsest ASU,Wake Forest,NC
OUTFALL SAMPLE DATE COLLECTED TPH TSS pH
m m m L
Outfall 1 AL OF 1-1 3/5/2015 9.6 23.4 6.4
Outfall 1 AL OF 1- 1-2 9/29/2015 ND ND 7.2
Outfall 1 AL OF 1 2/24/2016 ND ND 6.7
Outfall 1 AL OF 1-2 9/20/2016 ND ND 6.9

ATTACHMENT 3
VISUAL MONITORING RESULTS SUMMARY

TABLE 2. SUMMARY OF QUALITATIVE MONITORING RESULTS
Wake Fonat ASO,Wake Forest,NC
TOl'ALEVENT RECEIVING LAND ACTIVITIES FLOATING SUSPENDED
C.LARTI'V OIL EROSION OR OTHER
OUTFACE DATE TIME pRECIP. STItOLTUR! STREAM IN COLOR DOOR j151 SOLIDS SOLIDS FOAM SHEEN DEPOSTI'ION INDICATORS
DRAINAGEINAGE AREA (1-5) (1-5)
LOADING OF WRY LIGHT
Onfalll 1427=2 320 028R PIPE SMITH CREEK CRYOGENIC TAN NONE I I I NO NO NO NO
TRANSPORTS
LOADINGOF VERY LIGHT
Outwit 8/7=2 1014 0.12in PIPE SMII'HCREEK CRYOGENIC TAN.WATER IS NONE I 1 1 NO NO NO NO
TRANSPORTS PRETTY CLEAR.
LOADINGOF VERY LIGHT
Enlist 1 1/31/2013 1040 036. PIPE SMITH CREEK CRYOGENIC TAN.WATER IS NONE 1 2 1 NO NO NO NO
TRANSPORTS PRETTY CLEAR
LOADINGOF VERY LIGHT
Oulu[1 9/3/2013 1305 0.13 in PIPE SMITH CREEK CRYOGENIC TAN NONE I 1 I NO NO NO NO
TRANSPORTS
LOADING OF Y VER
Out4111 3/17=4 930 oil. PIPE SMITH CREEK CRYOGENIC LI WRY RY VERY
NONE 1 1 I NO NO NO NO
TRANSPORTS
LOADINGOF VERY VERY
OutfallI 10/IIR014 IWO 048. PIPE SMITH CREEK CRYOGENIC LIGHT TAN, NONE I I I NO NO NO NO
TRANSPORTS ALMOSTCLEAR
LOADING OF VERY LIGHT
Oulfdll 3I5R015 1100 074m. PIPE SMITH CREEK CRYOGENIC TAN NONE 2 1 1 NO NO NO NO
TRANSPORTS
LOADING OF WRY LIGHT
OudkiH 9/2912DIS 1500 0.24m. PIPE SMITHCREEK CRYOGENIC Tom, NONE 1 I I NO NO NO NO
TRANSPORTS
LOADING OF Consul23 m VERY LIGHT1 2R4O016 12M 0. . PIPE SMDTHCREEK CRYOGENIC LIGHT
NONE I 1 I NO NO NO
TRANSPORTS TAN
LOADINGOF
OufdlI 9nR20I6 IF00 0Min PIPE S,UI'I'I I I RFFK CRl'OGI:Ni( VERYLIGHTTAN NONE I I I NO NO 10 SO
'f RA.NSPORTS
LOADING O4 VERY LIGHT0mfdl2 3/5/2015 1110 0T4m. PIPE SMITH CREEK CRYOGENIC Tom, NONE _ I NO NO NO NO
TRANSPORTS
LOADINGOF LIGHT LI
Out6112 90912015 Isis 0.24m yER
. PIPE SMITH CREEK CRYOGENIC YLI NONE I 1 I NO NO NO NO
TRANSPORTS TAN
LOADING OF LIGHT Wall V242016 1200 0.23m yERYGHT'
. PIPE SMITH CREEK CRYOGENIC LI NONE I I I NO NO NO NO
TRANSPORTS
LOADING OF yERY WGHT
OuRA12 9aW2016 15M 0.19. PIPE SMITH CREEK CRYOGENIC TAN NONE NO NO NO NO
TRANSPORTS
Note:Ounfall2 was added in 2015.

ATTACHMENT 4
BMPS Y

STORMWATER POLLUTON PREVENTION
BEST MANAGEMENT PRACTICES
NON-STRUCTURAL BMPS
Minimize exposure
Wherever possible, industrial materials and activities are located indoors to minimize exposure to
precipitation. An up-to-date inventory is maintained by the Plant Manager, so supplies may be
ordered only as needed. Metal equipment that is stored outdoors is regularly inspected for
materials showing signs of deterioration or rusting and will be scheduled for prompt removal or
relocation to areas where debris, metals, and other pollutants will not contaminate storm water.
Outdoor materials storage areas will be maintained in good condition and according to good
housekeeping practices. Solid wastes are disposed in containers located inside the building, then
transferred to dumpsters outdoors or directly into dumpsters that are stored outdoors. All
dumpsters have a watertight cover that should be kept closed at all times other than when disposing
of materials. Water or residue from truck washing activities is prohibited from being discharged
into stormwater outfalls. Handling procedures have been developed for the materials used at the
site to minimize exposure to stormwater.
Good Housekeeping
Exposed areas of the facility are kept clean and orderly. Areas around trash containers, storage
areas, and loading/unloading areas are observed daily and swept/cleaned as needed. Storm sewer
inlets are kept clear of debris, dirt, and wastes. Garbage and waste materials are picked up on a
regular schedule by waste management vendors. Drums, tanks and containers are observed daily
during operations for leaks or conditions requiring corrective actions.
Preventative Maintenance
Preventative maintenance inspections are conducted on a quarterly basis, in conjunction with the
visual inspections,to ensure that all structures and equipment remain in good condition.
Spill Response
This facility has designated individuals who are responsible for the facility's discharge prevention
program. An Emergency Notification List is maintained. Trained personnel are authorized to
implement containment and cleanup actions that do not require the use of an outside contractor.
In the event of a spill, actions will be taken immediately to minimize further release. Cleanup
procedures are to be implemented after the spill is safely contained. Spill kits are located in the
Compressor Building. These kits remain stocked and are inspected regularly to ensure adequacy.
Delivery trucks are also equipped with spill kits.
Recovered materials will be disposed off-site by a licensed contractor in accordance with
applicable local, state and federal rules and regulations pertaining to disposal of hazardous and
non-hazardous wastes.
Erosion Control
Because areas of the site are stabilized, erosion and sedimentation should be minimal. When an
area of erosion is discovered, it will be stabilized with gravel or rock. If debris, silt, or sediment

buildup in the storm sewer inlet grates becomes excessive,the grate will be cleaned and silt fencing
or gravel may be placed around the inlets for protection.
Employee Training
SWPPP training is conducted on an annual basis. Records of training are documented and
maintained in each employee's personnel file. Documentation includes a description of the type
of training, employee information,the instructor, and date of completion. These records are kept
for a minimum of three years. The personnel training program is evaluated as needed to determine
the need for improvements or revisions. Training is provided to all personnel who may be involved
in the handling and storage of materials that have the potential for exposure to storm water. The
training program provides basic on-the-job training in the following areas and are described in
detail below.
• An introduction to the purpose and layout of the plant.
• Instruction on inspection,monitoring, and maintenance procedures.
• A summary of spill prevention and response procedures, and the specific function of each
employee during the implementation of these measures.
• An overview of water pollution laws applicable to the facility.
• A discussion on the importance of good housekeeping and material management practices.
• An overview of handling procedures and safety concerns associated with the cryogenic
liquids generated and stored on-site.
• A discussion on the conditions of the NPDES storm water discharge general permit.
Dust Generation and Vehicle Tracking
The potential for dust generation from vehicles is minimized by concrete covering traffic areas.
Vehicles entering and leaving the facility are mainly cars and product delivery trucks. The
entrance to the facility and the road and routes inside the facility are paved. Site surfaces not
covered with concrete are covered with gravel;therefore,dust or particulate control is unnecessary.
The raw material is air, the final products are cryogenic liquids, and waste materials are kept in
the enclosed containers at designated locations. Therefore, there are not off-site tracking of raw,
final, or waste materials. Also,the generation of dust is minimal due to the nature of operations.
Inspections
Secondary containment systems are visually inspected. All accumulated stormwater must be
inspected prior to discharge from containment areas.
STRUCTURAL BMPS
Water treatment chemicals are stored in the pump house. These chemicals may include Chemical
Treatment CL4658, CL41, and Sodium Hypochlorite. Any spills will be collected in a pit within
the building. No materials within the building will be exposed to storm water.

ATTACHMENT 5
SIGNIFICANT CHANGES

SIGNIFICANT FACILITY CHANGES
NA—There have been no significant changes made to the facility or its operation.

r
ATTACHMENT 6
CERTIFICATION

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources—Stormwater Permitting
Facility Name: Wake Forest ASU
Permit Number: NCS000462
Location Address: 326 Forestville Rd
Wake Forest, NC
County: Wake Forest
"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 STORMWAT/]ER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
/]
Signature / 'r A—==::� Date t A 017
ames Murphree Corporate Director Environmental Compliance
Print or type name of person signing above Title
SPPP Certification 10/13