AQ_F_0400056_20140225_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: 02/26/2014 County/FIPS: Anson/007
Facility Data Compliance Data
Piedmont Natural Gas- Wadesboro Compressor Station Observation Date 02/25/2014
259 Pleasant Grove Church Road Observer's Name Gregory Reeves
Wadesboro,NC 28170 Operating Status Operating
Lat: 35d 1.4834m Long: 80d 1.6830m Action Code
SIC: 4922/Natural Gas Transmission
NAILS: 48621 /Pipeline Transportation of Natural Gas
Contact Data Permit Data
Facility Contact Authorized Contact Technical Contact Permit 10097/ROO
Alicia Mooney Rodney Myers Gil Vinzani Issued 3/28/2011Expires 2/28/2016
Environmental Engineer VP of Environmental Engineer Classification Title V
[phone] Engineering/Operations [phone]
Services Permit Status Active
[phone]
Inspector's Sign ore: Comments:
Date of Signature: l�
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. Tom 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. At the time of this stack test,the facility was operating only one of the compressor engines,
ID No. COMPO1.

Piedmont Natural Gas, Inc.—Wadesboro Compressor Station
Source Test Observation Report
02/25/2014
Page 2 of 4
4. FACILITY DESCRIPTION:
The facility is a large natural gas pipeline compressor station. The facility accepts natural gas from the Transco
distribution pipeline at 500-800 psig pressure,and compresses this gas to 800-1,000 prig for injection back into
the pipeline to transport it to its destination. This facility was installed to be able to supply natural gas to the
Progress Energy Sutton electrical power station in Wilmington. The Piedmont facility consists of eight(8)
permitted natural gas-fired 4,735 HP compressors, plus a 770 HP natural gas-fired emergency generator. Only
four of the eight compressors have been installed to date. The facility is performing stack tests on the four
compressor engines to demonstrate compliance with NSPS Subpart JJJJ emission limits for the engines.
5. TEST CHRONOLOGY:
03/11/13 Facility commenced operation of the operations. Source Testing was required within
180 days of startup
03/15/13 Piedmont requested an extension of the time to test the engines at the facility due to
delays in the switch to natural gas at the Duke Sutton power plant.
04/09/13 Piedmont submitted stack testing notifications and testing protocols for the Wadesboro
and Lumberton facility emergency engine testing.
05/07/13 DAQ granted an extension of the time to test the engines.
05/07/13 DAQ approved the proposed stack testing protocol for the emergency generator engine
(ID No. EG-01).
05/21/13 Piedmont conducted stack testing of the emergency generator engine(ID No.EG-01)
12/20/13 Piedmont submitted a testing protocol for testing of the four compressor engines (ID
Nos. COMPOI through COMP04).
02/07/14 DAQ approved the stack testing protocol.
02/25/14 Stack testing commenced on the#1 compressor engine,ID No. COMPOL
6. PURPOSE OF STACK TEST:
The purpose of this test is to demonstrate compliance for the initial performance test for the natural gas-fired
compressor engines(ID Nos. COMPOI through COMP04)as required under NSPS Subpart JJJJ. These engines
are not "certified" engines, and thus a stack test is required to demonstrate compliance with the NOx, CO, and
VOC emission limits under the NSPS regulation.
The engines being tested are Caterpillar 4,735 HP four-stroke lean burn natural gas-fired reciprocating internal
combustion engines. Each engine drives a natural gas compressor. Under NSPS Subpart JJJJ, the emission
limits for this engine are as follows: [40 CFR 60, Subpart JJJJ,Table 11
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%0,
Pollutant Emission Limit Emission Limit
/h -hr ppmvd @ 15%02
NOx 1.0 82
CO 2.0 270
VOC 0.7 60

Piedmont Natural Gas,Inc.—Wadesboro Compressor Station
Source Test Observation Report
02/25/2014
Page 3 of 4
The approved test methods are as follows:
Target Proposed Test Number Test Number of
Pollutant Method of Test- Run Sampling Comments
Runs Duration Points
CO EPA Method 10 3 60 min
Oz EPA Method 3A 3 60 min No of sampling points is per M7E
NOx EPA Method 7E 3 60 min 1-3 stratification test
VOC EPA Method 25A 3 60 min
Moisture EPA Method 4 3 60 min 1-3 For moisture calculations, correction
to dry standard
CHa EPA Method 18 3 1 60 1-3 1 Correction of THC to report NMHC
THC=total hydrocarbon
NMHC=non-methane hydrocarbon
Testing is to be conducted at full load+ 10%. Proposed testing rate was 4,735 HP.
7. STACK TEST OBSERVATIONS:
On Tuesday February 25, 2014, Heather Carter and I, Greg Reeves of the Fayetteville Regional Office, arrived
at the Piedmont Natural Gas—Wadesboro Compressor Station site at 8:15 AM to observe stack testing of the 41
compressor engine (ID No. COMPOI). We met with Gil Vinzani, Environmental Engineer (919-899-6081
office, 919-623-5701 cell), Alan Henderson, Manager, Compression and Controls (910-419-7207 office, 910-
334-9035 cell), and Tony Jabon, consultant with Trinity Consultants in Charlotte, NC (704-553-4474 office,
214-274-7980 cell). 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).
Mr. Vinzani and Mr.Jabon conducted a tour of the facility while the testing preparations were completed.
The first run test for the#1 engine commenced at approximately 9:26 AM. The facility process controls
indicated that the engine load was approximately 92%of full load, The testing stopped at 9:42 AM due to a
failure of one of the gas analyzers, and this run was terminated. A technician was sent to obtain another
analyzer. Ms. Carter and I left the facility to perform an inspection at another facility in the area while the
replacement analyzer was obtained.
We returned to the site at approximately 2:00 PM. The second testing run had been commenced at
approximately 1:40PM. Average load on the engine per the facility instrumentation was 92%of full load. This
test ended at 2:40 PM. Preliminary field results of the testing(uncorrected)were CO emissions of 1.89 ppm
and NOx emissions of 25.3 ppm, with Oz at 13.45%.
The third testing run commenced at approximately 2:53 PM, and concluded at 3:53 PM without incident.
Engine load during this test per the facility instrumentation was approximately 97%of full load. Preliminary
field results of the testing(uncorrected)were CO emissions of 2.37 ppm and NOx emissions of 27.60 ppm,with
OZ at 13.3%.
The fourth testing run commenced at approximately 4:05 PM. Engine load was at approximately 97%. We did
not stay at the facility to witness the entire third run.
We departed the facility at approximately 4:15 PM.
Testing was to continue today to complete the#1 engine test runs. Additional testing runs for 42 and#3
engines is scheduled for Wednesday 02/26 and for#4 engine for Thursday 02/27.

Piedmont Natural Gas, Inc.—Wadesboro Compressor Station
Source Test Observation Report
02/25/2014
Page 4 of 4
8. COMPLIANCE STATEMENT:
It appeared that the stack testing during the second test run was conducted in accordance with the requirements
of the EPA methods specified. 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.
gµ r
cc: FRO Facility Files