AQ_F_0400056_20160523_ST_STO-Rpt

NORTH CAROLINA DIVISION OF Fayetteville Regional Office
7 AIR QUALITY Piedmont Natural Gas-Wadesboro Compressor
1 Station
1 Stack Test Observation Report NC Facility ID 0400056
Date: 05/13/2016 County/FIPS:Anson/007
Facility Data Compliance Data
Piedmont Natural Gas-Wadesboro Compressor Station Observation Date 05/12/2016
259 Pleasant Grove Church Road Observer's Name Gregory Reeves
Wadesboro,NC 28170 Operating Status Operating
1 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
Gil Vinzani Herb Jeans Gil Vinzani Issued 9/15/2014
Environmental Engineer Director of Technical Environmental Engineer Expires 8/31/2019
[phone] Field Operations [phone] Classification Title V
( )731-4422 704
Permit Status Active
Inspector's Signature: Comments:
Date of Signature: STACK TEST 2016-O87ST
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1. LOCATION:
Piedmont Natural Gas—Wadesboro Compressor Station,259 Pleasant Grove Church Road, Wadesboro,NC,
Anson County.
2. 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 151501 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.
3. 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.

Piedmont Natural Gas—Wadesboro Compressor Station
Stack Test Observation Report
Page 2 of 4
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.
4. TEST CHRONOLOGY:
03/28/16 FRO 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 12,2016.
05/10/16 DAQ SSCB reviewed the testing protocol and deemed it acceptable. Testing is for the periodic
performance testing required under NSPS Subpart JJJJ.
05/12/16 Testing was conducted on the engine.
5. 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.
Under NSPS Subpart JJJJ,the emission limits for this engine are as follows: [40 CFR 60,Subpart JJJJ,Table I
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.
3% Y' 4 t '''-, y Mal
NOx 2.0 160
CO 4.0 540
VOC(Non-Methane Hydrocarbon) 1.0 86
g/hp-hr=grams per horsepower—hour
ppmvd=parts per million by volume,dry basis, corrected to 15%02 content
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Piedmont Natural Gas—Wadesboro Compressor Station
Stack Test Observation Report
Page 3 of 4
The approved test methods are as follows:
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CO EPA Method 10 3 60 min
02 EPA Method 3A 3 60 min 1* *No of sampling points is per M7E
NOx EPA Method 7E 3 60 min stratification test
VOC EPA Method 25A 3 60 min
Moisture EPA Method 4 3 60 min 1* For moisture calculations,correction
to dry standard
CH4 EPA Method 18 3 60 min 1* Correction of THC to report NMHC
Volumetric EPA Method 2 3 60 min 8 For mass rate calculations
Flow
THC=total hydrocarbon
NMHC—non-methane hydrocarbon
Testing is to be conducted at full load+ 10%. Proposed testing rate was 804 HP.
6. STACK TEST OBSERVATIONS:
On Thursday May 12,2016, I,Greg Reeves 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 Gil Vinzani, Environmental Engineer (919-899-6081 office, 919-623-5701 cell), Herb Jeans, Director of
Technical Field Operations (704-731-4422). Air-Tech Environmental, LLC was performing the source test for
Piedmont. The technician for Air-Tech was Darrel Doerle(919-302-6627 office,919-544-6338 cell).
The first testing run commenced at approximately 7:47 AM prior to my arrival at the facility. The run ended at
8:49 AM. Test run 2 started at approximately 9:00 AM and ended at approximately 10:02 AM. Test run 3
started at approximately 10:12. I departed the facility prior to the end of the 31d test run.
The generator was connected to a heat sink load that allows full load operation. The generator was operating at
a load of approximately 550 KW,or approximately 92%of full load. The load during the test runs was very
steady at 550-551 KW. Typical field data and field calculations for the run were as follows(Further analysis
will be done prior to the final report):
:,
02 7.2% 7.96%
CO2 7.4% 7.16%
NOx 104 ppm 118 ppm
CO 375 ppm 380 ppm
THC** 827 ppm 791 ppm
** includes methane,which will be subtracted to obtain NMHC results.

Piedmont Natural Gas—Wadesboro Compressor Station
Stack Test Observation Report
Page 4 of 4
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7. COMPLIANCE STATEMENT:
It appeared that the stack testing was conducted in accordance with the requirements of the EPA methods E
specified during the stack testing on 05/12/16. Field results on the analysis of the stack gases and preliminary
emission calculations based on field measurements of power generation would appear to indicate compliance
with the emission limits set forth in NSPS Subpart JJJJ. However,these were only preliminary field
calculations. Final results will be submitted by the company.
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cc: FRO Facility Files