AQ_F_0400056_20210528_EI_Apprd-EI

2020 Emissions Inventory Review / Data Tracking Form
Facility Name: Piedmont Natural Gas - Wadesboro Compressor Stat Facility ID: 0400056
Facility Assigned to: Data Entry: Anson County
Classification: Gregory Reeves Confidential Copy Submitted?
Title V ❑YES
0 NO
Initial Review /Data Entry
0 Enter date received into ED. Date Received: 05/28/2021
0 Assigned to appropriate individual. Date Assigned: 06/10/2021 Date Due: 08/10/2021
❑ Paper copy submitted: One copy received with supporting documentation,certification form signed by responsible
official, and appears generally complete; OR
0 Electronic copy submitted: All supporting documentation and certification form(with time/date stamp)signed by
responsible official has been received.
Comments:
Inventory Review
0 All forms and supporting documentation appear to be complete if paper submission(check ED OS data if electronic).
0 Contact,address,phone number changes entered into I-Beam/Facilities if necessary.
0 All known operating scenarios,control devices,and emission release points have been entered for each emission
source(permitted,insignificant, and unpermitted)or note that the emission source was not operated or not required to report.
0 Check if SCC codes for each OS are accurate and update if needed.
0 Evaluate"U" sources for significance and address according to policy.
0 Calculations/forms appear to add up correctly.
0 All compliance issues are being addressed(e.g.Toxics limits,above TV thresholds,large emissions
increase/decrease,installation without a permit).
0 All volatile HAPs/TAPS were included in the VOC total.
0 Calculations and control efficiencies appear correct. Emission factors are the best available and most current factors
appropriate for the reporting facility(e.g. stack testing,AP-42,etc.).
0 Review facility comments and address any issues.
0 Update ED(Data Entry Main) if additional information is required(corrections due date and date received).
0 Check all ED QA/QC reports.
0 Comparison with previous emission inventory must be made and outliers(> 10%)must be investigated and explained.
0 Put inventory review comments and summarize any changes in ED-Data Entry Main"DAQ internal comments".
F
fo Requested: Date Info Received: Total Days on Hold:
eview Complete: 08/06/2021 Signature: g�Jlee
ubmitted to EI Coordinator: 08/06/2021
pproved: 08/06/2021 Initials: �`�

Facility Total CY 2020 Emission Summary Recorded in ED Facility ID#: 0400056
Facility Name: Piedmont Natural Gas -Wadesboro Compressor Stati4 Permit#(s): 10097T02
Green House Gases Pollutants (GHG) Actual Emissions
Tons/Yr
Pollutant CAS CY 2020 CY 2019 Demini- Change
from ED from Fees mus
Nitrous Oxide (N20) 10024972 Not Not 1.0 N/A
Reported Reported
CO2 equivalent (sum of individual GHG pollutant emissioi No GHGs
times their 1995 IPCC Global Warming Potential (GWP), Reported
converted to metric tons)
Criteria Pollutants Actual Emissions
(Tons/Year)
Pollutant CAS CY 2020 CY 2019 Demini- %
from ED from Fees mus Change
CO Co 0.640000 0.720000 0.5 -11.1%
NOx NOx 20.45 23.30 0.5 -12.2%
PM(TSP) TSP 1.26 1.42 0.5 1 -11.3%
PM 10 PM 10 1.26 1.42 0.5 1 -11.3%
PM2.5 PM2.5 1.26 1.42 0.5 -11.3%
S02 SO2 0.080000 0.080000 0.5 0.0%
VOC VOC 1.02 1.16 0.5 -12.1
Hazardous Air Pollutants (HAPs) Actual Emissions
and/or Toxic Air Pollutants (TAPs) (Pounds/Year)
Pollutant CAS CY 2020 CY 2019 Demini- %
from ED from Fees mus Change
Arsenic & Compounds (total mass of elemental AS, arsine and 0.040030 0.040030 0.01r*0%
all inorganic compounds)
Arsenic Unlisted Compounds - Specify Compound ASC-Other 0.040030 0.040030 0.01 0.0%
(Component of ASC)
Cadmium & compounds (total mass includes elemental metal) 0.280180 0.320160 0.1 -12.5%
Cadmium Metal, elemental, unreacted(Component( 7440-43-9 0.280180 0.320160 0.1 -12.5%
CDC)
Chromium -All/Total (includes Chromium (VI) categories, 0.340220 1 0.400210 0.1 -15.0%
metal and others)
Chromium Unlisted Compounds - Specify Compoun CRC-Other 0.340220 0.400210 0.1 -15.0%
(Component of CRC)
08/06/2021 Pagel of 3

Facility Total CY 2020 Emission Summary Recorded in ED Facility ID#: 0400056
Facility Name: Piedmont Natural Gas -Wadesboro Compressor Stati4 Permit#(s): 10097T02
Hazardous Air Pollutants (HAPs) Actual Emissions
and/or Toxic Air Pollutants (TAPs) (Pounds/Year)
Pollutant CAS CY 2020 CY 2019 Demini- %
from ED from Fees mus Change
Mercury& Compounds-all total mass includes Hg Vapor 0.080040 0.080040 0.001 0.0%
Mercury, vapor(Component of HGC) 7439-97-6 0.080040 0.080040 0.001 0.0%
Polycyclic Organic Matter(Specific Compounds from OAQPS 77.04 87.90 1.0 -12.4%
for TV)
Acenaphthylene (Component of 83329/POMTV) 208-96-8 1.38 1.58 1.0 1 -12.7%
Biphenyl (Component of 83329/POMTV) 92-52-4 53.03 60.50 10.0 -12.3%
Fluorene (Component of 83329/POMTV) 86-73-7 1.42 1.62 1.0 -12.3%
Naphthalene (Component of 83329/POMTV) 91-20-3 18.61 21.23 1.0 1 -12.3%
Phenanthrene (Component of 83329/POMTV) 85-01-8 2.60 2.97 1.0 1 -12.4%
Acetaldehyde 75-07-0 2,091.58 2,386.10 10.0 -12.3%
Acrolein 107-02-8 11285.97 11467.06 10.0 1 -12.3%
Benzene 71-43-2 110.08 125.59 1.0 -12.3%
Butadiene, 1,3- 106-99-0 66.79 76.21 1.0 -12.4%
Carbon tetrachloride 56-23-5 9.19 10.48 1.0 1 -12.3%
Dichloropropene, 1,3- 542-75-6 6.61 7.53 1.0 1 -12.2%
Ethylene dibromide (dibromoethane) 106-93-4 11.08 12.65 1.0 1 -12.4%
Formaldehyde 50-00-0 1,770.62 29018.36 10.0 1 -12.3%
Hexane, n- 110-54-3 277.71 316.82 100.0 1 -12.3%
Methylene chloride 75-09-2 5.00 5.71 1.0 1 -12.4%
Polycyclic Organic Matter (Inc PAH, dioxins, etc. N pOM 6.73 7.68 1.0 -12.4%
& AP 42 historic)
Toluene 108-88-3 102.08 116.46 100.0 -12.3%
Vinyl chloride 75-01-4 3.73 4.26 0.1 1 -12.4%
i
08/06/2021 Page 2 of 3

Largest Individual HAP Acetaldehyde 2,091.58 lbs
Total HAP Emis
sions fission s 5,824.961bs
Largest Individual 2 g vidual CAP NOx 0.45 tons
Total CAP Emissions 23.45 tons
Total TAP Emissions 5,734.19 lbs
Total Aggregate 23.45 tons
Emissions
DAQ's Comments Regarding Inventory
Emissions for 2020 were lower than 2019 due to decreased hours of operation of the facility.
08/06/2021 Page 3 of 3

"na
Piedmont
Natural Gas k � �
RECEIVED
May 3, 2021
MAY 2 8 2021
Ms. Heather Carter, Regional Supervisor oEQ-FaYEn
North Carolina Department of Environmental Quality
E"'«EREGbNA�oFF��E
Fayetteville Regional Office
225 Green Street, Suite 7I4
Systel Building
Fayetteville,North Carolina 28301
Subject: 2020 Emission Inventory
Piedmont Natural Gas Company, Inc.
Wadesboro Compressor Station
Wadesboro,Anson County,North Carolina
Facility ID No. 0400056; Air Quality Permit No. 10097T
Dear Ms. Carter:
Please find enclosed two copies(original plus one copy)of the 2020 emission inventory report
for the Wadesboro Compressor Station. All data has been entered into the AERO database via
the DAQ website,
A General Information Change Form has been enclosed as well to update the contact information
for the facility.
If you have any questions pertaining to the reports, please contact Kristen Belisario at
[phone].
Certification by Responsible Official:
"Based on information and belief formed after reasonable inquiry, I certify that the statements
and information contained in this document are true, accurate and complete." n
Respectfully yours,
'AAt
Adam Long
VP, Gas Pipeline Operations
Enclosures

1: Inventory Certification Form
Piedmont Natural Gas Company, Inc.
Wadesboro Compressor Station
Facility ID No. 0400056, Wadesboro,Anson County,North Carolina

COPY of RECORD Date Submitted: 5/3/2021 08:34:11
Inventory Certification Form(Title V) V( .
Facility blame: Piedmont Natural Gas- Wadesboro Compressor Station yo Facility ID . 0400056
259 Pleasant Grove Church Road 0/010 Permit: 10097
Wadesboro,NC 28170 County : Anson
DAQ Region : FRO
North Carolina Department of Environmental Quality
Division of Air Quality
Air Pollutant Point Source Emissions Inventory-Calendar Year 2020
These forms must be completed and returned even if the facility did not operate or emissions were zero
The legally defined"ResponsibleOfficial" of record for your facility is Adam Lone
This person or one that meets the definition below must sign this certification form.
The official submitting the information must certify that he'she complies with the requirements as specified in Title 15A NCAC
2Q.0520(b)which references and follows the federal definition.40 CFR Part 70.2 defines a responsible as meaning one of the
following:
1. For a corporation:a president,secretary,treasurer,or vice-president of the corporation in charge of a principal business
function,or any other person who performs similar policy or decision making functions for the overall operation of one or
more manufacturing,production,or operating facilities applying for a or subject to a permit and either
i. the facilities employ more than 250 persons or have gross annual sales or expenditures exceeding$25 million(in
second quarter 1980 dollars);or
ii. the delegation of authority to such representatives is approved in advance by the permitting authority;
2. For partnership or sole proprietorship;a general partner or the proprietor,respectively;
3. For a municipality,state,federal,or other public agency includes the chief executive officer having responsibility for the
overall operations of a principal geographic unit of the agency(e.g.,a Regional Administrator of EPA).
CERTIFICATION STATEMENT:
(important:Legally Responsible Official read and sign after all su mis ions are final.I
I certify that I am the responsible official for this facility,as described above,and hereby certify that the information contained in
this air emissions report, including attached calculations and documentation, is true, accurate and complete. (Subject to legal
penalties of up to$25,000 per occurrence and possible imprisonment as outlined in G.S. § 143-215.3(a)(2))
Responsible Official's Signature Below (use blue ink): Date Signed: cS/0 V
Printed Name: Adam Long
Signature:
This form applies to Title VYacilit' s. If this facility is not classified asTitle V,please telephone your regional office Emission
Inventory Contact at once for proper forms.
Email address of Responsible Official: Adam.Long2C duke-energy.com
Information on this Form cannot be held confidential
COPY of RECORD Date Submitted: 5/312021 08:34:11
1

Facility Total CY 2020 Emission Summary Facility Id : 0400056
Green House Ga
ses Pollutants GHG
Actual Emissions(Tons/Year)
Pollutant CAS 2020 2019 %Change
Criteria Pollutants
Actual Emissions(TonsNear)
Pollutant CAS 2020 2019 %Change
0
CO CO 0.64 .72 -11.111116/o
N x
0
O NOx 20.45 23.3 -12.231753/o
0
PM(TSP) TSP 1.26 1.42 11.267603/o
PM 10 PM 10 1.26 1.42 -11.267603%
PM2.5 PM2.5 1.26 1.42 -11.267603%
S02 S02 0.08 .08 0.0%
VOC VOC 1.02 1.16 -12.068964%
Hazardous Air Pollutants(HAPS) and/or Toxic Air Pollutants(TAPs)
Actual Emissions(Pounds/Year)
Pollutant CAS 2020 2019 %Change
Arsenic&Compounds(total mass of elemental AS, arsine and all inorganic compounds).04003
Arsenic Unlisted Compounds( ASC-Other 0.04003 .04003 0.0%
Specify&Component of ASC)
Cadmium&compounds(total mass inc elemental metal).28018
Cadmium Metal (elemental 7440-43-9 0.28018 .32016 -12.487504%
unreacted, Component of CDC)
Chromium-All/Total(Inc Chromium (VI)categories, metal and Others).34022
Chromium Unlisted Compounds CRC-Other 0.34022 .40021 -14.989627%
(Specify&Component of CRC)
Mercury&Compounds-all total mass, inc Hg Vapor.08004
Mercury,vapor(Component of HGC) 7439-97-6 0.08004 .08004 0.0%
Polycyclic Organic Matter(Specific Compounds from OAQPS for TV)77.044
Acenaphthylene(Component of 208-96-8 1.381 1.581 -12.650217%
POMTV)
Biphenyl(Component of POMTV) 92-52-4 53.03 60.5 -12.34711%
Fluorene(Component of POMTV) 86-73-7 1.421 1.621 -12.338065%
Naphthalene(Component of 91-20-3 18.61 21.23 -12.341022%
POMTV)
Phenanthrene(Component of 85-01-8 2.602 2.972 -12.449526%
POMTV)
Acetaldehyde 75-07-0 2091.58 2386.1 -12.343154%
Acrolein 107-02-8 1285.97 1467.06 -12.3437395%
Benzene 71-43-2 110.08 125.59 -12.349706%
Butadiene, 1,3- 106-99-0 66.79 76.21 -12.36058%
Carbon tetrachloride 56-23-5 9.186 10.476 -12.313861%
Dichloropropene, 1,3- 542-75-6 6.614 7.534 -12.211309%
Ethylene dibromide 106-93-4 11.077 12.647 -12.414016%
Formaldehyde 50-00-0 1770.62 2018.36 -12.274322%
Hexane, n- 110-54-3 277.71 316.82 -12.344553%
Methylene chloride 75-09-2 5.003 5.713 -12.427796%
Polycyclic Organic Matter(Inc PAH,
dioxins, etc. NC&AP 42 historic POM 6.734 7.684 -12.363351%

amorphous glob)
Toluene 108-88-3 102.08 116.46 -12.347585%
Vinyl chloride 75-01-4 3.732 4.262 -12.435475%
close

2: General Information Change Form
Piedmont Natural Gas Company, Inc.
Wadesboro Compressor Station
Facility ID No. 0400056, Wadesboro, Anson County,North Carolina

Facility Name Piedmont Natural Gas Company, Inc. —Wadesboro Compressor Station
Facility ID 0400056
North Carolina Department of Environment and Natural Resources
Division of Air Quality
General Information
If any information already provided to DAQ has changed or otherwise is incorrect, please
provide corrections. You may leave blanks where the information is unchanged.
(Except Facility ID and Name).
Physical (911) Address of Facility
Name of Responsible Official
Title Telephone#
E-Mail Address
Mailing Address of Responsible Official
Name of Facility Technical/Permit Mailing Contact Kristen Belisario
Title Environmental Specialist 1_Telephone# (_919 )_546_-_4005_
E-Mail Address Kristen.Bel isario(a�duke-energy com�
Mailing Address of Technical/Permit Mailing Contact
410 S. Wilmington Street Raleigh,N.C. 27601
Name of Inspection Contact Kristen Belisario
Title Environmental Specialist 1`Telephone# (_919 )_546_-_4005_
E-Mail Address_Kristen.Bel isarioAduke-energy.corn
Name of Billing/Invoice Contact Cynthia Winston
Title Manager, Permitting and Compliance Telephone# (_919 )J546_-_5538_
E-Mail Address C nthia.Winston duke-ener .com
Billing/Invoice Company Piedmont Natural Gas Company, Inc.
Billing/Invoice Address
410 S. Wilmington Street Raleigh,N.C. 27601
Standard Industrial Classification (SIC) Code(s)
North American Industry Classification System
(NAICS—six digit) Code(s)—
If known (see instructions)
Report Prepared by Kristen Belisario Telephone# 919 _546 -_4005_
E-Mail Address Kristen.Bel isario(a,duke-energy.com
Provide to Appropriate DAQ Regional Office as needed.
Information on This Form cannot be held confidential.

3: Emission Calculations
Piedmont Natural Gas Company, Inc.
Wadesboro Compressor Station
Facility ID No. 0400056, Wadesboro, Anson County,North Carolina

Piedmont Natural Gas Company,Inc.-
Wadesboro Compressor Station 2020 Emissions Inventory
Piedmont Natural Gas, Inc. - Wadesboro Compressor Station
Facility Wide Emissions Summary
Criteria Air Pollutant Summary
Actual Emissions Actual Emissions 2019
2020 CY CY
Pollutant (tpy) (tpy) %Difference
PM 1.26 1.42 -11.3%
PM10 1.26 1.42 -11.3%
PMZ 5 1.26 1.42 -11.3%
SO2 0.08 0.08 0.0%
NOX 20.45 23.30 -12.2%
VOC 1.02 1.16 -12.1%
CO 0.64 0.72 -11.1%
Total HAP 3.31 3.78 -12.4%
Hours of Operation
Actual Hrs of Actual Hrs of
Operation 2020 CY Operation 2019 CY
Unit (hrs/yr) (hrs/yr) %Difference
COMP01 1,734.3 1,993.1 -13.0%
COMP02 1,723.8 1,992.2 -13.5%
COMP03 1,784.8 2,012.3 -11.3%
COMP04 1,790.1 2,026.7 -11.7%
EGO 1 28.0 26.0 7.7%
1 of 8 Wadesboro Compressor Station
Compare

Piedmont Natural Gas Company, Inc.-
Wad esboro Compressor Station 2020 Emissions Inventory
Compressors Hours of Operation
COMPOI COMP02 COMP03 COMP04 COMP05 COMP06 COMP07 COMP08 EG01
(hr/mo) (hr/mo) (hr/mo) (hr/mo) (hr/mo) (hr/mo) (hr/mo) (hr/mo) (hr/mo)
Jan-20 150.1 148.4 178.0 152.0 -- -- -- -- 3.0
Feb-20 185.7 162.2 160.4 193.6 -- -- -- -- 1.0
Mar-20 137.3 132.6 153.8 117.7 -- -- -- -- 3.0
Apr-20 37.0 44.7 37.8 51.4 -- -- -- -- 3.0
May-20 114.3 119.5 75.7 113.9 -- -- -- -- 2.0
Jun-20 209.9 117.7 198.0 119.7 -- -- -- -- 2.0
Jul-20 147.4 225.2 161.2 222.2 -- -- -- -- 2.0
Aug-20 164.3 200.6 183.3 174.6 -- -- -- -- 3.0
Sep-20 81.7 33.2 59.8 64.7 -- -- -- -- 2.0
Oct-20 137.0 169.7 177.7 154.7 -- -- -- -- 2.0
Nov-20 249.5 106.0 119.2 200.8 -- -- -- -- 3.0
Dec-20 120.1 264.0 279.9 224.8 -- -- -- -- 2.0
Total 1,734.3 1,723.8 1,784.8 1,790.1 0 0 0 0 28.0
Dec-Feb 26.29% 33.33% 34.64% 31.86% -- -- -- -- 21.43%
Mar-May 16.64% 17.22% 14.98% 15.81% -- -- -- -- 28.57%
Jun-Aug 30.08% 31.53% 30.40% 28.85% -- -- -- -- 25.00%
Sep-Nov 27.00% 17.92% 19.99% 23.47% -- -- -- -- 25.00%
Total 100% 100% 100% 100% -- -- -- -- 100%
2 of 8 Wadesboro Compressor Station
Inputs
i

Piedmont Natural Gas Company,Inc.-
Wadesboro Compressor Station 2020 Emissions Inventory
Piedmont Natural Gas, Inc. - Wadesboro Compressor Station
Facility Wide Emissions Summary
Criteria Air Pollutant Summary
Actual Emissions
Pollutant (lb/hr) (lb/yr) (tpy)
PM 1.48 2,498.66 1.26
PM 10 1.48 2,498.66 1.26
PM2.5 1.48 2,498.66 1.26
SO2 0.09 147.11 0.08
NOx 27.23 40,883.45 20.45
VOC 1.42 2,046.85 1.02
CO 3.45 1,286.96 0.64
Toxic/Hazardous Air Pollutant Summary
Combined Actual Emissions
Pollutant (lb/hr) (lb/yr) (tpy)
Arsenic 2.90E-05 4.00E-02 2.45E-05
Cadmium 1.60E-04 2.80E-01 1.35E-04
Chromium 2.03E-04 3.40E-01 1.72E-04
M ercu ry 3.77E-05 8.00E-02 3.19E-05
1,3-Butad i ene 3.95E-02 66.79 3.34E-02
1,3-DichIoropropene 3.91E-03 6.61 3.30E-03
Acenaphthylene 8.19E-04 1.38 6.92E-04
A petal d eh yde 1.24E+00 2091.58 1.05E+00
A crol ei n 7.61 E-01 1285.97 6.43 E-01
Benzene 6.51 E-02 110.08 5.50E-02
Biphenyl 3.14E-02 53.03 2.65E-02
Carbon Tetrachloride 5.43E-03 9.19 4.59E-03
Ethylene Dibromide 6.56E-03 11.08 5.54E-03
Fluorene 8.39E-04 1.42 7.09E-04
Formaldehyde 1.31 E+00 1770.62 8.85E-01
Methylene Chloride 2.96E-03 5.00 2.50E-03
n-Hexane 1.64E-01 277.71 1.39E-01
Naphthalene 1.10E-02 18.61 9.31 E-03
PAH 3.98E-03 6.73 3.37E-03
Phenanthrene 1.54E-03 2.60 1.30E-03
Toluene 6.04E-02 1.02E+02 5.10E-02
Vinyl Chloride 2.21E-03 3.73 1.86E-03
Total HAP 3.31
3 of 8 Wadesboro Compressor Station
Emissions Summary

Piedmont Natural Gas Company,Inc.-
Wadesboro Compressor Station 2020 Emissions Inventory
COMPOI -Natural Gas-Fired RICE
Fuel Consumption 7,508 Btu/hp-hr
Engine Output Rating b 4,735 hp
Engine Hours of Operation 1,734.30 hr/yr
Criteria Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
PM e 9.99E-03 0.36 615.75 0.31
PM10e 9.99E-03 0.36 615.75 0.31
lb/MMBtu burned
PM2.5 e 9.99E-03 0.36 615.75 0.31
S02 5.88E-04 0.02 36.25 0.02
NOx e 5.80 5.80 10,053.74 5.03
VOC e 0.29 lb/hr 0.29 502.95 0.25
CO° 0.17 1 1 0.17 1 298.30 L 0.15
Toxic/Hazardous Air Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (Ib/hr) (lb/yr) (tpy)
Arsenic 1.96E-07 6.97E-06 0.01 6.04E-06
Cadmium 1.08E-06 3.83E-05 0.07 3.32E-05
Chromium 1.37E-06 4.88E-05 0.08 4.23E-05
M ercu ry 2.55E-07 9.06E-06 0.02 7.86E-06
1,3-Butadiene 2.67E-04 9.49E-03 16.46 8.23E-03
1,3-Dichloropropene 2.64E-05 9.39E-04 1.63 8.14E-04
Acenaphthylene 5.53E-06 1.97E-04 0.34 1.70E-04
Acetaldehyde 8.36E-03 2.97E-01 515.44 2.58E-01
A crol ei n 5.14E-03 1.83E-01 316.91 1.58E-01
Benzene 4.40E-04 1.56E-02 27.13 1.36E-02
burned
Biphenyl 2.12E-04 lb/ r 7,54E-03 13.07 6.54E-03
ned
Carbon Tetrachloride 3.67E-05 1.30E-03 2.26 1.13E-03
Ethylene Dibromide 4.43E-05 1.57E-03 2.73 1.37E-03
Fluorene 5.67E-06 2.02E-04 0.35 1.75E-04
M ethylene Chloride 2.00E-05 7.11E-04 1.23 6.17E-04
n-Hexane 1.11 E-03 3.95E-02 68.44 3.42E-02
Naphthalene 7.44E-05 2.64E-03 4.59 2.29E-03
PAH 2.69E-05 9.56E-04 1.66 8.29E-04
Phenanthrene 1.04E-05 3.70E-04 0.64 3.21E-04
Toluene 4.08E-04 1.45E-02 25.16 1.26E-02
Vinyl Chloride 1.49E-05 5.30E-04 0.92 4.59E-04
Formaldehyde ,s 2.40E-02 g/hp-hr 2.51E-01 434.50 2.17E-01
Total HAP 0.82
a Emission factors are from AP42,5th Edition,Section 3.2,Table 3.2-2,4-stroke lean burn natural gas fired reciprocating engines unless
otherwise specified.Metals are from AP-42,Table 1.44.
n From Caterpillar specification sheet for G3616 engine.
°NOx,CO,and VOC emission factors come from August 6,2019 stack test on engine COMPO1.
d Fuel consumption based on fuel HHV.
e Emission factors include condensable and filterable PM. All filterable PM is assumed to be less than I micrometer in diameter.
f Uncontrolled emission factor for formaldehyde is from the Caterpillar specification sheet for engine at 100%load:
emission factor= 0.4 g/hp-hr
R Oxidation catalyst control efficiency for formaldehyde provided in Enerflex quote dated June 10,2010:
control efficiency= 94%
4 of 8 Wadesboro Compressor Station
COM P01

Piedmont Natural Gas Company,Inc.-
Wadesboro Compressor Station 2020 Emissions Inventory
COMP02-Natural Gas-Fired RICE
Fuel Consumption 7,508 Btu/hp-hr
Engine Output Rating b 4,735 hp
Engine Hours of Operation 1,723.80 hr/yr
Criteria Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
PM e 9.99E-03 0.36 612.03 0.31
PMto e 9.99E-03 lb/MMBtu burned 0.36 612.03 0.31
PM2.5 e 9.99E-03 0.36 612.03 0.31
S02 5.88E-04 0.02 36.03 0.02
NOx c 5.80 5.80 9,992.87 5.00
VOC e 0.29 lb/hr 0.29 499.90 0.25
CO e 0.17 0.17 296.49 10.15
Toxic/Hazardous Air Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
Arsenic 1.96E-07 6.97E-06 0.01 6.01E-06
Cadmium 1.08E-06 3.83E-05 0.07 3.30E-05
Chromium 1.37E-06 4.88E-05 0.08 4.21 E-05
Mercury 2.55E-07 9.06E-06 0.02 7.81 E-06
1,3-Butadiene 2.67E-04 9.49E-03 16.36 8.18E-03
1,3-Dichloropropene 2.64E-05 9.39E-04 1.62 8.09E-04
Acenaphthylene 5.53E-06 1.97E-04 0.34 1.69E-04
Acetaldehyde 8.36E-03 2.97E-01 512.32 2.56E-01
Acrolei n 5.14E-03 1.83E-01 314.99 1.57E-01
Benzene 4.40E-04 lb/M M Btu 1.56E-02 26.96 1.35E-02
Biphenyl 2.12E-04 burned 7.54E-03 12.99 6.50E-03
Carbon Tetrachloride 3.67E-05 1.30E-03 2.25 1.12E-03
Ethylene Dibromide 4.43E-05 1.57E-03 2.71 1.36E-03
Fluorene 5.67E-06 2.02E-04 0.35 1.74E-04
M ethylene Chloride 2.00E-05 7.11E-04 1.23 6.13E-04
n-Hexane 1.11E-03 3.95E-02 68.02 3.40E-02
Naphthalene 7.44E-05 2.64E-03 4.56 2.28E-03
PA H 2.69E-05 9.56E-04 1.65 8.24E-04
Phenanthrene 1.04E-05 3.70E-04 0.64 3.19E-04
Toluene 4.08E-04 1.45E-02 25.00 1.25E-02
Vinyl Chloride 1.49E-05 5.30E-04 0.91 4.57E-04
Formaldehyde ,s 2.40E-02 g/hp-hr 2.51E-01 431.87 2.16E-01
Total HAP 0.81
a Emission factors are from AP-42,5th Edition,Section 3.2,Table 3.2-2,4-stroke lean burn natural gas fired reciprocating engines unless
otherwise specified.Metals are from AP-42,Table 1.4-4.
b From Caterpillar specification sheet for G3616 engine.
NOx,CO,and VOC emission factors come from August 6,2019 stack test on engine COMPOI.
d Fuel consumption based on fuel HHV.
Emission factors include condensable and filterable PM. All filterable PM is assumed to be less than 1 micrometer in diameter.
f Uncontrolled emission factor for formaldehyde is from the Caterpillar specification sheet for engine at 100%load:
emission factor= 0.4 g/hp-hr
g Oxidation catalyst control efficiency for formaldehyde provided in Enerflex quote dated June 10,2010:
control efficiency= 94%
5 of 8 Wadesboro Compressor Station
COM P02

Piedmont Natural Gas Company,Inc.-
Wadesboro Compressor Station 2020 Emissions Inventory
COMP03-Natural Gas-Fired RICE
Fuel Consumption 7,508 Btu/hp-hr
Engine Output Rating b 4,735 hp
Engine Hours of Operation 1,784.80 hr/yr
Criteria Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
PM e 9.99E-03 0.36 633.68 0.32
PM10 e 9.99E-03 0.36 633.68 0.32
lb/MMBtu burned
PM2.5 e 9.99E-03 0.36 633.68 0.32
S02 5.88E-04 0.02 37.31 0.02
NOx c 5.80 5.80 10,346.49 5.17
VOC e 0.29 lb/hr 0.29 517.59 0.26
CO` 0.17 0.17 1306.99 0.15
Toxic/Hazardous Air Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
Arsenic 1.96E-07 6.97E-06 0.01 6.22E-06
Cadmium 1.08E-06 3.83E-05 0.07 3.42E-05
Chromium 1.37E-06 4.88E-05 0.09 4.35E-05
M ercu ry 2.55E-07 9.06E-06 0.02 8.09E-06
1,3-Butadiene 2.67E-04 9.49E-03 16.94 8.47E-03
1,3-Dichloropropene 2.64E-05 9.39E-04 1.68 8.38E-04
Acenaphthylene 5.53E-06 1.97E-04 0.35 1.75E-04
Acetaldehyde 8.36E-03 2.97E-01 530.44 2.65E-01
Acrolei n 5.14E-03 1.83E-01 326.13 1.63E-01
Benzene 4.40E-04 lb/M M Btu 1.56E-02 27.92 1.40E-02
Biphenyl 2.12E-04 burned 7.54E-03 13.45 6.73E-03
CarbonTetrachloride 3.67E-05 1.30E-03 2.33 1.16E-03
Ethylene Dibromide 4.43E-05 1.57E-03 2.81 1.41E-03
Fluorene 5.67E-06 2.02E-04 0.36 1.80E-04
M ethylene Chloride 2.00E-05 7.11E-04 1.27 6.35E-04
n-Hexane 1.11 E-03 3.95E-02 70.43 3.52E-02
N aphthalene 7.44E-05 2.64E-03 4.72 2.36E-03
PA H 2.69E-05 9.56E-04 1.71 8.53E-04
Phenanthrene 1.04E-05 3.70E-04 0.66 3.30E-04
Toluene 4.08E-04 1.45E-02 25.89 1.29E-02
Vinyl Chloride 1.49E-05 5.30E-04 0.95 4.73E-04
Formaldehyde ,s 2.40E-02 g/hp-hr 2.51E-01 447.15 2.24E-01
Total HAP 0.84
Emission factors are from AP-42,5th Edition,Section 3.2,Table 3.2-2,4-stroke lean burn natural gas fired reciprocating engines unless
otherwise specified.Metals are from AP-42,Table 1.4-4.
b From Caterpillar specification sheet for G3616 engine.
NOx,CO,and VOC emission factors come from August 6,2019 stack test on engine COMP01.
d Fuel consumption based on fuel HHV.
z Emission factors include condensable and filterable PM. All filterable PM is assumed to be less than 1 micrometer in diameter.
f Uncontrolled emission factor for formaldehyde is from the Caterpillar specification sheet for engine at 100%load:
emission factor= 0.4 g/hp-hr
Oxidation catalyst control efficiency for formaldehyde provided in Enerflex quote dated June 10,2010:
control efficiency= 94%
6of 8 Wadesboro Compressor Station
COM P03

Piedmont Natural Gas Company,Inc.-
Wadesboro Compressor Station 2020 Emissions Inventory
COMP04- Natural Gas-Fired RICE
Fuel Consumption 7,508 Btu/hp-hr
Engine Output Rating b 4,735 hp
Engine Hours of Operation 1,790.10 hr/yr
Criteria Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
PM e 9.99E-03 0.36 635.57 0.32
PM to e 9.99E-03 0.36 635.57 0.32
PM2.5 e 9.99E-03 lb/MMBtu burned 0.36 635.57 0.32
S02 5.88E-04 0.02 37.42 0.02
NOx` 5.80 5.80 10,377.21 5.19
VOC` 0.29 lb/hr 0.29 519.13 0.26
CO` 0.17 1 1 0.17 1 307.90 0.15
Toxic/Hazardous Air Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a units (lb/hr) (lb/yr) (tpy)
Arsenic 1.96E-07 6.97E-06 0.01 6.24E-06
Cadmium 1.08E-06 3.83E-05 0.07 3.43E-05
Chromium 1.37E-06 4.88E-05 0.09 4.37E-05
M ercu ry 2.55E-07 9.06E-06 0.02 8.11 E-06
1,3-Butadiene 2.67E-04 9.49E-03 16.99 8.50E-03
1,3-Dichloropropene 2.64E-05 9.39E-04 1.68 8.40E-04
Acenaphthylene 5.53E-06 1.97E-04 0.35 1.76E-04
Acetaldehyde 8.36E-03 2.97E-01 532.02 2.66E-01
A crol ei n 5.14E-03 1.83E-01 327.10 1.64E-01
Benzene 4.40E-04 I b/M M Btu 1.56E-02 28.00 1.40E-02
Biphenyl 2.12E-04 burned 7.54E-03 13.49 6.75E-03
Carbon Tetrachloride 3.67E-05 1.30E-03 2.34 1.17E-03
Ethylene Dibromide 4.43E-05 1.57E-03 2.82 1.41E-03
Fluorene 5.67E-06 2.02E-04 0.36 1.80E-04
M ethylene Chloride 2.00E-05 7.11E-04 1.27 6.36E-04
n-Hexane 1.11E-03 3.95E-02 70.64 3.53E-02
Naphthalene 7.44E-05 2.64E-03 4.73 2.3 7E-03
PA H 2.69E-05 9.56E-04 1.71 8.56E-04
Phenanthrene 1.04E-05 3.70E-04 0.66 3.31E-04
Toluene 4.08E-04 1.45E-02 25.96 1.30E-02
Vinyl Chloride 1.49E-05 5.30E-04 0.95 4.74E-04
Formaldehyde ,s 2.40E-02 g/hp-hr 2.51E-01 448.48 2.24E-01
Total_HA P 0.84
a Emission factors are from AP-42,5th Edition,Section 3.2,Table 3.2-2,4-stroke lean burn natural gas fired reciprocating engines unless
otherwise specified.Metals are from AP42,Table 1.4-4.
From Caterpillar specification sheet for G3616 engine.
NOx,CO,and VOC emission factors come from August 6,2019 stack test on engine COMPOI.
d Fuel consumption based on fuel HHV.
e Emission factors include condensable and filterable PM. All filterable PM is assumed to be less than I micrometer in diameter.
t Uncontrolled emission factor for formaldehyde is from the Caterpillar specification sheet for engine at 100%load:
emission factor= 0.4 g/hp-hr
Oxidation catalyst control efficiency for formaldehyde provided in Enerflex quote dated June 10,2010:
control efficiency= 94%
7 of 8 Wadesboro Compressor Station
COM PO4

Piedmont Natural Gas Com an ,Inc.-
P Y
Wadesboro Compressor Station 2020 Emissions Inventory
EG01 -Emergency Generator
Fuel Consumption` 6,624 Btu/hp-hr
Engine Output Rating 880 hp
Engine Hours of Operation 28 hr/yr
Criteria Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
PM b 9.99E-03 0.06 1.63 0.00
PM10 b 9.99E-03 0.06 1.63 0.00
lb/MMBtu burned
PM,5 b 9.99E-03 0.06 1.63 0.00
SOZ 5.88E-04 0.003 0.10 0.00
NOx d 4.04 4.04 113.15 0.06
VOC d 0.26 lb/hr 0.26 7.28 0.00
CO d 2.76 1 2.76 1 77.28 1 0.04
Toxic/Hazardous Air Pollutant Summary
Emission Factor Actual Emissions
Pollutant Emission Factor a Units (lb/hr) (lb/yr) (tpy)
Arsenic 1.96E-07 1.14E-06 3.20E-05 1.60E-08
Cadmium 1.08E-06 6.29E-06 1.76E-04 8.80E-08
Chromium 1.37E-06 8.00E-06 2.24E-04 1.12E-07
Mercury 2.55E-07 1.49E-06 4.20E-05 2.08E-08
1,3-Butad i en a 2.67E-04 1.5 6E-03 0.04 2.18E-05
1,3-Dichloropropene 2.64E-05 1.54E-04 0.004 2.15E-06
A cen aphthy l en a 5.53E-06 3.22E-05 0.001 4.51 E-07
Acetaldehyde 8.36E-03 4.87E-02 1.36 6.82E-04
A crol ei n 5.14E-03 3.00E-02 0.84 4.19E-04
Benzene 4.40E-04 2.56E-03 0.07 3.59E-05
Biphenyl 2.12E-04 lb/MMBtu 1.24E-03 0.03 1.73E-05
Carbon Tetrachloride 3.67E-05 burned 2.14E-04 0.006 3.00E-06
Ethylene Dibromide 4.43E-05 2.58E-04 0.007 3.62E-06
FI u oren a 5.67E-06 3.31 E-05 0.001 4.63E-07
Formaldehyde 5.28E-02 3.08E-01 8.62 4.31 E-03
M ethylene Chloride 2.00E-05 1.17E-04 0.003 1.63E-06
n-Hexane 1.11 E-03 6.47E-03 0.18 9.06E-05
Naphthalene 7.44E-05 4.34E-04 0.01 6.07E-06
PA H 2.69E-05 1.57E-04 0.004 2.20E-06
Ph en ant h ren a 1.04E-05 6.06E-05 0.002 8.49E-07
Toluene 4.08E-04 2.38E-03 0.07 3.33E-05
Vinyl Chloride 1.49E-05 8.69E-05 0.002 1.22E-06
Total HAP 5.89E-03
a Emission factors are from AP-42,5th Edition,Section 3.2,Table 3.2-2,4-stroke lean burn natural gas fired reciprocating engines unless otherwise
specified.
b Emission factors include condensable and filterable PM. All filterable PM is assumed to be less than 1 micrometer in diameter.
Emergency generator fuel consumption from Waukesha engine specifications sheet.
d NOX,CO,and VOC emission factors come from May 8,2019 stack test on the emergency generator.
8 of 8 Wadesboro Compressor Station
EG01