AQ_F_0400056_20190516_ST_STO-Rpt

NORTH CAROLINA DIVISION OF Fayetteville Regional Office
AIR QUALITY Piedmont Natural Gas-Wadesboro Compressor
Station
Stack Test Observation Report NC Facility ID 0400056
Date: 05/16/2019 County FIPS: An--n/007
Facility Data Compliance Data
Piedmont Natural Gas-Wadesboro Compressor Station Observation Date 05/08/2019
259 Pleasant Grove Church Road Observer's Name Stephen Allen
Wadesboro,NC 28170 Operating Status Operating
Lat: 35d 1.4834m Long: 80d 1.6830m Action Code 23/STACK TEST
SIC: 4922/Natural Gas Transmission OBSERVED
NAICS: 48621 /Pipeline Transportation of Natural Gas
Contact Data Permit Data
Facility Contact Authorized Contact Technical Contact Permit 10097/TO
Christopher Friel Adam Long Randy Wooten Issued 9/31/2019
Lead FITS Professional Director,Gas Pipeline Environmental Services Expires tion Title
[phone] Operations Manager Classification Title
[phone] [phone] Permit Status Active
Inspector's Signature: Comments:
Source Test Tracking ID (2019-093ST)
Date of Signature: Sit�� 1 q
I. LOCATION:/
Piedmont Natural Gas—Wadesboro Compressor Station, 259 Pleasant Grove Church Road,
Wadesboro,NC, Anson County.
II. DIRECTIONS:
From FRO,take US Hwy 401 South through Raeford and Wagram. Just outside Wagram,turn right
onto Old Wire Road(NC 144). Follow Old Wire Road across US 15/501 and through Laurel Hill to
US 74. Turn right onto US 74. Follow US 74 35 miles to Wadesboro,then turn right onto N. Greene
St/NC Hwy 109. Drive 4.9 miles,then turn left onto Pleasant Grove Church Road. The Piedmont
facility is located approximately 0.3 miles on the left side of the road.
III. 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 other vehicles.

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. The facility operates only as needed to supply the gas
demand downstream of the compressor station, usually in the colder winter months.
IV. TEST CHRONOLOGY:
03/21/19 SSCB received a letter from the company with testing protocols and stack test
notifications for both the Wadesboro facility. Stack testing was proposed for only the
emergency generator engine at this location. The proposed date for the test May 8, 2019.
04/26/19 DAQ SSCB reviewed the testing protocol and deemed it acceptable. Testing is for the
periodic performance testing required under NSPS Subpart JJJJ.
04/26/19 FRO DAQ received a copy of the test protocol.
V. PURPOSE OF STACK TEST:
The purpose of this test is to demonstrate continuing compliance with the NSPS Subpart JJJJ
emission limits for the emergency generator natural gas-fired reciprocating internal combustion
engine. This engine is not an EPA"certified" engine, and thus a stack test is required to demonstrate
compliance with the NOx, CO, and VOC emission standards under the NSPS regulation. The testing
is required every 8,760 hours of operation or every three years,whichever comes first. This engine is
seldom run except for short periods for testing every week. The engine has only run 91 hours since
the last stack testing that was performed on May 21, 2013.
The engine being tested is a Waukesha 880 HP natural gas-fired engine, driving a 600 KW electrical
generator(ID No. EGO I). Under NSPS Subpart JJJJ,the emission limits for this engine(40 CFR 60,
Subpart JJJJ,Table 1)are as follows:
�.' _ ` , oil � aon
r t �
h 19
:;
NOx 2.0 160
CO 4.0 540
VOC(Non-Methane 1.0 86
Hydrocarbon)
g/hp-hr=grams per horsepower—hour
ppmvd=parts per million by volume, dry basis,corrected to 15%02 content
Note that the owner or operator can choose to comply with either the emission limit in g/hp-hr OR the
emission limit in ppmvd% 15% 02.

The approved test methods are as follows:
0
Volumetric EPA Method 3 runs,60 minutes each --- ---
Flow 1 &2 Concurrent with(320)
Molecular 3A 3 runs,60 minutes each
Weight Oxy en Concurrent with(320)
Moisture
Content EPA Method 320 --- ---
2.0 g/l]P-hr
60 Subpart (orl60 ppmvd@15%
NOx EPA Method 320 JJJJ 02
3 runs, 60 minutes each 4.0 WHP-hr
60 Subpart (or 540ppmvd @15%
CO EPA Method 320 JJJJ 02
60 Subpart 1.0 gW-hr
VOC EPA Method 320 JJJJ (or 86 ppmvd@ 15%02
Testing is to be conducted at full load+ 10%. Proposed testing rate was 804 HP.
VI. STACK TEST OBSERVATIONS:
On Wednesday May 8, 2019, 1, Stephen Allen of the Fayetteville Regional Office, arrived at the
Piedmont Natural Gas—Wadesboro Compressor Station site to observe stack testing of the
emergency generator engine. I met with Randy Wooten,Environmental Engineer(704-382-6730
office, 704-477-6784 cell).Mostardi Platt out of Elmhurst, Illinois was performing the source test for
Piedmont. Contact information for the company is [phone] ([e-mail]).
During the calibration process the NOx readings were slightly above the limit(161). The generator
operator made some adjustments and readings immediately fell to—130. The first testing run
commenced at approximately 10:10 AM. The run ended at 11:10 AM. Test run 2 started at
approximately 11:25 AM and ended at approximately 12:25 AM. Test run 3 started at approximately
12:50 PM. I departed the facility prior to the end of the 2 d test run. MT. Wooten errailed start and
end times for all runs on 8 March 2019.
The generator was connected to a heat sink load that allows full load operation. The generator was
operating at a load of approximately 692 KW, or approximately 95% of full load. The load during
the test runs was very steady at 692-693 KW. Typical field data and field calculations for the run
were as follows(further analysis will be done prior to the final report):
02 7.4% 7.4%
CO2 6.5% 8.0%
NOx 136.8 in 136.4 in
CO 167.5 in 163.9 in
VOC 9.7 ppin 9.7 p in

VIL COMPLIANCE STATEMENT:
It appeared that the stack testing was conducted in accordance with the requirements of the EPA
methods specified during the stack testing on 05/08/19.
/sea
cc: FRO Facility Files