AQ_F_0400056_20220510_CMPL_InspRpt

NORTH CAROLINA DIVISION OF Fayetteville Regional Office
AIR QUALITY Piedmont Natural Gas-Wadesboro Compressor
Station
Inspection Report NC Facility ID 0400056
Date: 05/23/2022 County/FIPS: Anson/007
Facility Data Permit Data
Piedmont Natural Gas-Wadesboro Compressor Station Permit 10097/T02
259 Pleasant Grove Church Road Issued 6/10/2019
Wadesboro,NC 28170 Expires 5/31/2024
Lat: 35d 1.4834m Long: 80d 1.6830m Class/Status Title V
SIC: 4922/Natural Gas Transmission Permit Status Active
NAICS: 48621 /Pipeline Transportation of Natural Gas Current Permit Application(s)None
Contact Data Program Applicability
Facility Contact Authorized Contact Technical Contact SIP/Title V
MACT Part 63: Subpart ZZZZ
Kristen Belisario Adam Long Kristen Belisario NSPS: Subpart JJJJ
Environmental Specialist GM Pipeline Operations Environmental Specialist
I [phone] I
[phone] [phone]
Compliance Data
Comments:
Inspection Date 05/10/2022
Inspector's Name Evangelyn Lowery-Jacobs
Inspector's Signature: Operating Status Operating
Compliance Status Compliance-inspection
Action Code FCE
Date of Signature: Inspection Result Compliance
Total Actual emissions in TONS/YEAR:
TSP S02 NOX VOC CO PM10 *HAP
2020 1.26 0.0800 20.45 1.02 0.6400 1.26 2091.58
2019 1.42 0.0800 23.30 1.16 0.7200 1.42 2386.10
2018 1.73 0.1200 20.18 7.91 1.44 1.73 2911.13
*Highest HAP Emitted(in pounds)
Five Year Violation History:None
Date Letter Type Rule Violated Violation Resolution Date
Performed Stack Tests since last FCE:None
Date Test Results Test Method(s) Source(s)Tested

Piedmont Natural Gas-Wadesboro Compressor Station
Compliance Inspection Report
Page 2 of 8
I. DIRECTIONS TO SITE:
From FRO,head south on Green Street toward Maiden Lane. At the traffic circle,take the 2nd exit onto
Gillespie Street and turn right onto W Russell Street. Travel for 0.5 mile and turn left onto Robeson Street for
approximately 2 miles. Use the left 2 lanes to turn left onto Raeford Road for 10 miles and continue onto US-
401 for approximately 20 miles. Just passed Wagram,turn right onto Old Wire Road(NC Hwy 144)and travel
6.2 miles. At the traffic circle,take the 2nd exit onto NC-144 for approximately 6 miles. Make a slight right
onto NC-1319 to Laurel Hill. Merge onto HWY 74 W.and continue for 30 miles to Lilesville. Turn right onto
Camden Street,then left onto Wall Street. Travel for 1 mile and make a slight right onto Stanback Ferry Ice
Plant Road for 1.3 miles. Turn left to stay on Stanback Ferry Ice Plant Road for approximately 1 mile,then turn
right onto Winfree Road for 0.6 mile. Turn right onto NC-109 N for 1.7 miles,then left onto Pleasant Grove
Church Road for 0.3 mile. Turn left to stay on Pleasant Grove Church Road and the facility is located on the
left side of the road.
II. SAFETY CONSIDERATIONS:
The usual FRO safety gear is required,including hard hat,safety shoes,safety glasses,and hearing protection.
There may be numerous pieces of equipment operating on site,including forklifts,personnel lifts,trucks,cars,
and others.
III. FACILITY DESCRIPTION:
The facility is a large natural gas pipeline compressor station. The facility accepts natural gas from the Trans-
Continental distribution pipeline at 500-800 psig pressure and compresses this gas to 800-1,000 psig for
injection into the Piedmont pipeline to transport it to its destination. The gas pipeline leads eventually to the
Duke Sutton electrical power generation plant in Wilmington. The Piedmont facility consists of four(4)natural
gas-fired 4,735 HP compressors(8 are permitted at the facility),plus a 770 HP natural gas-fired emergency
generator. All the engines are fueled by natural gas pulled directly from the gas transmission pipeline.

Piedmont Natural Gas-Wadesboro Compressor Station
Compliance Inspection Report
Page 3 of 8
IV. PERMITTED EQUIPMENT:
--777777777777
� c � ntrc �s �ritit I3II �+ � in
One four-stroke lean burn natural gas-fired
COMPOI reciprocating internal combustion engine yt Catal is oxidizer
NSPS (4,735 horsepower rating)powering a compressor COMPO 1 C 3 (24.0 cubic feet of oxidation catalyst)
MACT
NOT OPERATING—15,230 hours
COMP02 One four-stroke lean burn natural gas-fired
reciprocating internal combustion engine COMP02C Catalytic oxidizer
NSPS 4 735 horsepower rating)powering a compressor 24.0 cubic feet of oxidation catalyst)
j ( � P g)P g p ( Y ) ,
MACT NOT OPERATING- 15,241 hours
COMP43 One four-stroke lean burn natural gas-fired a
reciprocating internal combustion engine Catalytic oxidizer
NSPS COMP03 C
MACT 1 (4,735 horsepower rating)powering a compressor (24.0 cubic feet of oxidation catalyst)
NOT OPERATING—15,245 hours
}
COMP04
One four-stroke lean burn natural gas-fired
reciprocating internal combustion engine I Catalytic oxidizer
NSPS
MACT ' (4,735 horsepower rating)powering a compressor COMP04C (24.0 cubic feet of oxidation catalyst)
NOT OPERATING—15,256 hours }
i
COMP05 1
One four-stroke lean burn natural gas-fired
reciprocating internal combustion engine Catalytic oxidizer
NSPS 4 735 horsepower rating)powering a compressor COMPOSC 24.0 cubic feet of oxidation catal st
MACT 3 ( , p g)p g p ; ( Y )
NOT YET INSTALLED
COMP06
One four-stroke lean burn natural gas-fired
reciprocating internal combustion engine Catalytic oxidizer
NSPS COMP06C
MACT
(4,735 horsepower rating)powering a compressor (24.0 cubic feet of oxidation catalyst) r
NOT YET INSTALLED z
COMP07
One four-stroke lean burn natural gas-fired F
f reciprocating internal combustion engine Catalytic oxidizer
NSPS (4,735 horsepower rating)powering a compressor 3 COMP07C (24.0 cubic feet of oxidation catalyst)
MACT NOT YET INSTALLED
s
One four-stroke lean burn natural gas-fired
COMP08 reciprocating internal combustion engine E Catalytic oxidizer
NSPS 1 (4,735 horsepower rating)powering a compressor COMP08C a (24.0 cubic feet of oxidation catalyst)
MACT
NOT YET INSTALLED
t One four-stroke lean burn natural gas-fired
EGO
MACT emergency generator(770 hp maximum rating) N/A N/A
OPERATING,WE 0% Opacity—229 hours
}

Piedmont Natural Gas-Wadesboro Compressor Station
Compliance Inspection Report
Page 4 of 8
V. FACILITY INSPECTION SUMMARY:
On 10 May 2022 I,Evangelyn Lowery-Jacobs with DAQ FRO visited the Piedmont Natural Gas—Wadesboro
Compressor Station plant site in Wadesboro. I met with Lance Eckford,Compression Supervisor,Aaron
Muniz,and Alan Henderson, Senior Compressor Technicians. Mr.Muniz verified the FacFinder data is up to
date and accurate.
Records for operating hours and operating loads on the engines are kept on the computerized control system.
The operator was able to show the records of operating hours for each of the permitted engines. Operating
hours for each engine were as follows:
Hours O erated as©f
r
Hours Operated as of f
Engine 08125/2020�. 0511012022
(from previous in
report) 3
#1 Compressor 12,217 15,230
(COMPO 1) 3
#2 Compressors ;
' COMP02 12,225 15,241 }
( ) E
#3 Compressor
! (COMP03) 12,224 15,245
#4 Compressor 12,254 15,256
(COMP04) '
EmergenEcG Generator 193 229
( )_ _ x
Mr.Muniz led me on a tour of the engine room. The compressors were not operating at the time of inspection;
however,the facility was conducting source testing on the emergency generator(EGO 1). The compressors last
operated during the week of 01 May 2022 during hot weather days. The engines run alternately based on the
number of operating hours for each. All of the engines appeared to be very well maintained,and no issues were
observed. Mr.Muniz indicated there is no expansion planned for the facility and no new equipment has been
added since the last inspection.
VI. SPECIFIC PERMIT CONDITIONS:
A. Eight 4,735 Four Stroke Lean Burn Natural Gas-fired Compressor Engines(ID Nos.COMP01
through COMP08)
i. 15A NCAC 2D.0516 SULFUR DIOXIDE EMISSIONS FROM COMBUSTION SOURCES—
Emissions of sulfur dioxide from the eight 4,735 HP compressor engines shall not exceed 2.3 pounds
per million Btu heat input.
APPEARS IN COMPLIANCE—The engines use only natural gas, with an EPA AP-42 emission
factor of 0.007 lb/mmBtu. As long as the engines only combust natural gas, they should not exceed the
limitation. The compressors were not operating at the time of inspection;however, the facility was
conducting source testing on the emergency generator(EGO]). Only 4 of the permitted compressor
engines have been installed.

Piedmont Natural Gas-Wadesboro Compressor Station
Compliance Inspection Report
Page 5 of 8
ii. 15A NCAC 2D.0521 CONTROL OF VISIBLE EMISSIONS—Visible emissions from the eight
compressor engines shall not exceed 20 percent opacity when averaged over a 6-minute period. 6-
minute averaging periods may exceed 20 percent opacity no more than once in any hour and not more
than four times in any 24-hour period.In no event shall the 6-minute average exceed 87 percent
opacity.
APPEARS IN COMPLIANCE—The typical opacities for these engine exhausts are zero. The facility
should have no difficulty complying with these limits. There were no visible emissions observed from
the emergency generator(EGO]) exhaust during the inspection.
iii. 15A NCAC 2D.1423 LARGE INTERNAL COMBUSTION ENGINES—The Permittee shall not
cause to be emitted into the atmosphere nitrogen oxides(NOx)in excess of 125 ppm,corrected to 15
percent by volume stack gas oxygen on a dry basis,averaged over a rolling 30-day period. This limit
may be adjusted basis the engine efficiencies. Compliance with the limits will be demonstrated by
conducting stack testing at the engine exhausts. A report is required by October 31 of each year,
documenting the total nitrogen oxide emissions during the period Mayl through September 30 of each
year,beginning with the year of the first ozone season that the engines operate. Records are required
to be maintained for each engine for ID and location of each engine;number of hours of operation of
each engine each day,including startups, shutdowns,and malfunctions,and the type and duration of
maintenance and repairs;date and results of any emissions corrective maintenance taken;results of
compliance testing. Emission standards do not apply during periods of start-up and shutdown and
periods of malfunctions,not to exceed 36 consecutive hours,or regularly scheduled maintenance
activities.
APPEARS IN COMPLIANCE—The facility maintains all records electronically through the DCS
control system, which maintains hours of operation and other data. Some paper records are also
maintained for the preventative maintenance activities. The last ozone season report was received at
FRO on 1 012 512 02 1, and the facility was in compliance..
B. 880 HP Four Stroke Lean Burn Natural Gas-fired Emergency Generator(ID No.EG01)
i. 15A NCAC 2D.0516 SULFUR DIOXIDE EMISSIONS FROM COMBUSTION SOURCES—
Emissions of sulfur dioxide from the emergency generator engine shall not exceed 2.3 pounds per
million Btu heat input.
APPEARS IN COMPLIANCE—The engine combusts only natural gas. The EPA AP-42 emission
factor for sulfur dioxide for natural gas combustion is 0.001 lb/mmBtu. As long as this engine only
combusts natural gas, it should easily meet this limitation. The facility was conducting source testing
on the emergency generator(EGO]), during the inspection.
ii. I5A NCAC 2D.0521 CONTROL OF VISIBLE EMISSIONS-Visible emissions from the
emergency generator engine shall not exceed 20 percent opacity when averaged over a 6-minute
period.6-minute averaging periods may exceed 20 percent opacity no more than once in any hour and
not more than four times in any 24-hour period. In no event shall the 6-minute average exceed 87
percent opacity.
APPEARS IN COMPLIANCE—Typical visible emissions for this engine during operation are zero
opacity. The facility should have no difficulty complying with the permit limitation. The facility was
conducting source testing on the emergency generator(EG01), during the inspection. There were no
visible emissions observed from the emergency generator(EG01) exhaust during the inspection.

Piedmont Natural Gas-Wadesboro Compressor Station
Compliance Inspection Report
Page 6 of 8
C. Compressor Engines(COMP01 through COMP04)and Emergency Generator Engine(EG01)
i. 40 CFR 63,Subpart ZZZZ STATIONARY RECIPROCATING INTERNAL COMBUSTION
ENGINES—The engines meet the requirements of Subpart ZZZZ by meeting all the requirements of
NSPS Subpart JJJJ"Stationary Spark Ignition Internal Combustion Engines."
APPEARS IN COMPLIANCE—The engines demonstrate compliance by complying with the
requirements of NSPS Subpart JJJJ.
ii. 40 CFR 60,Subpart JJJJ STATIONARY SPARK IGNITION INTERNAL COMBUSTION
ENGINES—The compressor engines must meet the following emission limits: NOx— 1.0 g/HP-hr
and 82 ppmvd @ 15%oxygen;CO 2.0 g/HP-hr and 270 ppmvd @ 15%oxygen;VOC 0.7 g/HP-hr and
60 ppmvd @ 15%oxygen. The emergency engine must meet the following emission limits: NOx—
2.0 g/HP-hr and 160 ppmvd @ 15%oxygen;CO 4.0 g/HP-hr and 540 ppmvd @ 15%oxygen;VOC—
1.0 g/HP-hr and 86 ppmvd @ 15%oxygen. VOCs do not include formaldehyde. The nine engines are
not certified engines,and therefore the facility must conduct initial stack testing to demonstrate initial
compliance on each engine. Records of maintenance plans and records of conducted maintenance
must be maintained,as well as records of the stack testing. Subsequent stack testing must be
conducted every 8,760 hours or 3 years,whichever comes first. Results of stack testing must be
submitted within 60 days after the testing is performed. Initial notification is required.
APPEARS IN COMPLIANCE—Source testing was being conducted on the emergency generator
engine(EG01) on the day of the facility inspection. The previous source testing performed was for the
emergency generator engine on 0510812019. Results of the test demonstrated compliance with the
emission limits. The facility was granted a "Waiver for Emissions Testing of One Natural Gas Engine
as Representative of Emissions for Engines COMP01-COMP04 and EGO]"in a letter dated 14
February 2022 from Mr. Stephen Hall. The waiver was issued to PNG Wadesboro allowing
conditional approval of representative testing of identical units on an ongoing basis. This waiver
exempts COMP01 from the 2022 subject testing. Engines COMP02 through COMP04 are all being
tested in 2022 since none of these engines have been tested since 2016 After the 2022 testing is
completed, at least half of the subject engines are tested once every three years with all engines being
tested at least once every 6 years.
Stack testing for one compressor engine(COMP01)was conducted on 6 August 2019. The test reports
submitted demonstrated compliance with the emission limits. Source testing is scheduled for
compressor engines(COMP02 through COMP04) during June 2022. The operating hours of the four
compressor engines were as noted in the table below. The emergency engine is seldom run except for
operational checks. The facility engine maintenance records were observed and indicate that the
engines are serviced in accordance with manufacturer specifications. The initial notification for the 5
current engines was received at FRO on 0310412013.
Engine Hours of Operation:
.� � •��'Y �1��- fi '- ) 1 +,''fr`F '""' 'k �x e`:-w'k"^T'�T's<,n`Z ,x 5-''-Y
COMP01 08/06/2019 12,217 15,230
M COMP02 08/17/2016 12,225 15,241
66M403 __F -08/18/2016 12,224 15,245
COMP04 08/18/2016 12,225 15,256
_ _ — _
EG01 05/08/2019 193 229

Piedmont Natural Gas-Wadesboro Compressor Station
Compliance Inspection Report
Page 7 of 8
Stack Testing Results:
r .; a rear
�� ine :�miss�►n mils _ 77+�v�i
-
--c"W 08l1612 9
NOx 82 ppm 3 9.6 ppm
....P..n.�».dam-»,_. .,m.»..e .,..��...._..�....., .........._.._...e.....es-...f
CO t 270 ppm 1.9 ppm
VOC 60 ppm 2.2 ppm
S �`� 1
oprr ib 9
mi" Lets
R"'
S
t}81l?��1�6
NOx $2 ppm — 30.9 ppm
CO 270 ppm 2.6 ppm
VOC 60 ppm 18.0 ppm
C�mpresQr Mack T(CO ' %ng
Ex 3missa�Limas
esu�Is
MP
NOx 82 ppm 3 5.7 ppm
CO 270 ppm 5.0 ppm
VOC 60 ppm ppm
m
M M Stack T�smg
44
Carssr R
nemis }inlet
r -
(O{3:�PO4
0811612�19
NOx �82 ppm. 33.4 ppm
s CO 270 ppm 3.3 ppm -
VOC 60 ppm 18.8 ppm
w 7
Eme enc St +ck Testing
nerd or, � s €n inats
gists
engine� 01) Q 11812019
}
NOx 160 ppm 145.4 ppm
CO 540 ppm 163.1 ppm
��..�._VOC _ g�ppm10.1 ppm_.u....._
iii. 15A NCAC 2Q.0317 AVOIDANCE CONDITION FOR 40 CFR 63 SUBPART ZZZZ(HAP
MAJOR CLASSIFICATION AVOIDANCE)—The facility has accepted an emission limit of no
more than 10 tons of formaldehyde per consecutive 12-month period to avoid the Title III Major
Source rules for this Subpart. This requirement is met by conducting the required monitoring,
recordkeeping,and reporting of emissions of CO based on stack testing.
APPEARS IN COMPLIANCE—The review of the potential controlled emissions during the permit
review process showed that this limit should not be exceeded. Proper operation and maintenance of
the catalytic oxidizers on the engines is required to comply with this limit. The stack testing results-
from 2019 indicated compliance with the emission limits.

Piedmont Natural Gas-Wadesboro Compressor Station
Compliance Inspection Report
Page 8 of 8
iv. PERMIT GENERAL CONDITION 3.I.A—EXCESS EMISSIONS REPORTING
REQUIREMENTS (15A NCAC 2D.0535 and 2Q.0508(t)(2)]—Requires notification to DAQ when
an excess emission event occurs that lasts more than 4 hours,or when a deviation from the permit
conditions occurs.For excess emissions events,must be reported by 9 AM the following business day.
Deviations from permit conditions must be reported quarterly.
APPEARS IN COMPLIANCE—Mr. Muniz stated that no excess emission events have occurred;
therefore, no notifications have been required by the facility. He is aware of the notification
requirement for excess emissions events.
v. PERMIT GENERAL CONDITION 3.P-ANNUAL COMPLIANCE CERTIFICATION—An
annual compliance certification report is required to be submitted to DAQ and EPA postmarked by no
later than March 1 each year,noting any deviations from permit conditions.
APPEARS IN COMPLIANCE—The last ACC report was received at FRO on 0310212022 and
appeared to be in compliance.
vi. PERMIT GENERAL CONDITION 3.X-ANNUAL EMISSION INVNETORY
REQUIREMENTS—An annual emission inventory is required to be submitted no later than June 30
of each year.
APPEARS IN COMPLIANCE—The last annual emission inventory for the facility was received at
FRO on 0512812021 and appeared complete.
vii. PERMIT GENERAL CONDITION 3.DD-CLEAN AIR ACT,SECTION 112(r)
REQUIREMENTS
APPEARS IN COMPLIANCE—The facility does not store any of the listed 112(r) chemicals in
amounts that exceed the threshold quantities. Therefore, the facility is not required to maintain a
written Risk Management Plan(RMP).
VII. COMPLIANCE HISTORY:
There have been no negative compliance instances since the permit was initially issued in 2011.
VIII. FACILITY PINK SHEET REVIEW:
There were no pink sheet items to be included in the facility inspection.
IX. CONCLUSIONS/RECOMMENDATIONS:
The facility appeared to be operating IN COMPLIANCE with the specific conditions contained in the
facility's current Air Permit on 10 May 2022.
/elj