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ROY COOPERro
Governor
ELIZABETH S.BISERf aX �
SecretaryiX�= -''j''
MICHAEL ABRACZINSKAS NORTH CAROLINA
Director Environmental Quality
12 October 2022
Adam Long, GM Pipeline Operations
4720 Piedmont Row Drive
Charlotte, NC 28210
SUBJECT: Central Office Review of Source Test Results:
RICE Engines, Source ID Nos. COMP02, COMP03, and COMP04
Air Quality Permit No. 10097T02
Piedmont Natural Gas - Wadesboro Compressor Station
Wadesboro,North Carolina,Anson County
Facility ID: 0400056 Fee Class: Title V
Dear Mr. Long:
The Division has reviewed your source test results report that was received by our
Central Office on 15 August 2022. The report was for source testing on four-stroke lean-burn
natural gas-fired reciprocating internal combustion engines (ID Nos. COMP02, COMP03, and
COMP04), conducted on 21-22 June 2022. The testing was conducted pursuant to 40 CFR Part
63 Subpart ZZZZ National Emissions Standards for Hazardous Air Pollutants for Stationary
Reciprocating Internal Combustion Engines and 40 CFR Part 60 Subpart JJJJ Standards of
Performance for Stationary Spark Ignition Internal Combustion Engines for the purpose of
demonstrating compliance with emission standards for nitrogen oxides (NOx), carbon monoxide
(CO), and volatile organic compounds (VOC).
On 21 September 2022, this Division determined that the subject testing performed at
your facility was an acceptable source test. The review determined that compliance with the
applicable emission standards is indicated for these sources. A copy of the determination
memorandum, issued by Ms. Taylor Fort, of the NC Division of Air Quality, Stationary Source
Compliance Branch, is attached.
Should you have any questions regarding this matter,please contact Mr. Stephen Allen,
Environmental Specialist, at [phone], in the Fayetteville Regional Office.
Sincerely,
Heather S. Carter
Regional Supervisor
Division of Air Quality,NCDEQ
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Attachment: DAQ RCO review dated 21 September 2022
cc:❑ FRO Files(with attachment)
North Carolina Department of Environmental Quality I Division of Air Quality
Fayetteville Regional Office 1 225 Green Street,Suite 714 1 Fayetteville,North Carolina 28301
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Department of Environaw I Quality V 910.433.3300 T 1910A 85.7467 F

DIVISION OF AIR QUALITY
September 21, 2022
MEMORANDUM
To: Heather Carter, Fayetteville Regional Office
From: Taylor Fort, Stationary Source Compliance Branch 44
Subject: Piedmont Natural Gas—Wadesboro Compressor Station
Wadesboro, Anson County,North Carolina
Facility ID 0400056, Air Permit No. 10097T02
Nitrogen Oxides, Carbon Monoxide, and Volatile Organic Compounds Emissions
Testing of Compressor Engines COMP02, COMP03, and COMP04
Performed June 21 and 22, 2022 by Mostardi Platt
DAQ Tracking Nos. 2022-089ST, 2022-224ST, 2022-225ST
Mostardi Platt performed EPA Method 320 for nitrogen oxides (NOx), carbon monoxide (CO), and
volatile organic compounds (VOC) emissions testing of COMP02, COMP03, and COMP04. The tested
sources are three of four(4) four-stroke lean-burn natural gas-fired reciprocating internal combustion
engines COMPOI through COMP04, each powering a compressor and rated 4,735 horsepower. The
engines are controlled by respective catalytic oxidizers COMPO 1 C through COMP04C. The revised
testing waiver issued on February 14, 2022 exempts COMPO 1 from this round of testing. The emissions
test results demonstrate compliance with the applicable regulations.
40 CFR 63 Subpart ZZZZ National Emissions Standards for Hazardous Air Pollutants for Stationary
Reciprocating Internal Combustion Engines, 40 CFR 60 Subpart JJJJ Standards of Performance for
Stationary Spark Ignition Internal Combustion Engines, and 15A NCAC 2D .1423 Large Internal
Combustion Engines apply. Compliance with 63 Subpart ZZZZ is met by complying with the limits of 60
Subpart JJJJ. Compliance may be indicated in units of either grams per horsepower-hour(g/HP-hr) or
parts per million corrected to 15%oxygen (ppmvd@ 15%0?). The emissions test results are shown in the
following tables.
2022-089ST: COMP02 Emissions Test Results June 21,2022
Pollutant Test Result Emission Limit Standard Compliance
0 82 ppmvd@ 15%O� 60 Subpart JJJJ
NOx 37.4 ppmvd@ 15/oOz 125 ppmvd@ 15%0? 2D .1423
Yes
CO 6.2 ppmvd@ 15%0, 270 ppmvd@ 15%02 60 Subpart JJJJ
VOC as methane 2.3 ppmvd@15%O-) 60 ppmvd@ 15%02 60 Subpart JJJJ
2022-224ST: COMP03 Emissions Test Results June 22,2022
Pollutant Test Result Emission Limit Standard Compliance
0 82 ppmvd@15%02 60 Subpart JJJJ
NOx 38.0 ppmvd@ 15/0O? 125 ppmvd@ 15%0? 2D .1423
Yes
CO 5.3 ppmvd@15%0� 270 ppmvd@15%Oz 60 Subpart JJJJ
VOC as methane 2.5 ppmvd@15%O? 60 ppmvd@15%O, 60 Subpart JJJJ

September 21, 2022
Piedmont Natural Gas—Wadesboro Compressor Station
Tracking Nos. 2022-089ST, 2022-224ST, 2022-225ST
Page 2
2022-225ST: COMP04 Emissions Test Results June 22,2022
Pollutant Test Result Emission Limit Standard Compliance
NOx 37.6 ppmvd@15%O2 82 ppmvd@15%02 60 Subpart JJJJ
125 ppmvd@ 15%OZ 2D .1423
Yes
CO 4.1 ppmvd@ 15%OZ 270 ppmvd@ 15%02 60 Subpart JJJJ
VOC as methane 1.6 ppmvd@ 15%02 60 ppmvd@ 15%02 60 Subpart JJJJ
Testing was conducted within 10 percent of the highest achievable load during normal operations.The
test rates are acceptable. The emissions test results demonstrate compliance with applicable regulations. If
there are any questions regarding this review, please contact me at ta�lor.fortc�?ncdenr. ov.
cc: IBEAM Documents- 0400056