AQ_F_1300104_20160407_ST_RvwLtr

Division of Air Quality
April 07,2016
MEMORANDUM
To: Ron Slack,Mooresville Regional Office
From: Thaochi Vu, Stationary Source Compliance Branch(SSCB)
Subject: Concord City Generating Plant#2(Manor Site),Plant# 1 (Flor nce Site),Non-permitted
Weddington Site
Concord, Cabarrus County,North Carolina
Facility ID: Manor Site: 1300104,Permit No. 07645R06,Florence Site: 1300103,Permit No.
07644R06
Carbon Monoxide Testing Conducted 11/30 to 12/02,2015, on 7 diesel-fired internal combustion
engines by Montrose Air Quality Services
Tracking No: 2015-228ST(1300104)and 2016-040ST(1300103)
The subject test report has been reviewed.The sources tested were seven diesel-fired engines/generators
used for emergency and peak-shaving power generation at the facility. The purpose of the testing was to
demonstrate compliance with emission limits established by 40 CFR 63, Subpart ZZZZ(4Z),National
Emission Standards for Hazardous Air Pollutants from Reciprocating Internal Combustion Engines. The
facility must control carbon monoxide(CO)by at least 70%efficiency(inlet and outlet testing)or to 23
ppmvd @ 15%02 for the engines. Testing can be conducted simultaneously at the inlet and outlet to
demonstrate the reduction efficiency for the unit. Alternatively, the outlet concentration of CO can be
used to demonstrate compliance. The results of the test are summarized below:
Table 1: Test Result Summary
Test.Results
Outlet Compliance
Sgurve Standard 9 ission Limit Concentr#hon Iodic#ted
Florence#1 40 CFR 63 (4Z) 70%CO reduction 15.15 ppm @ 15% Yes
or 23 ppmvd @ 02
15%02
Florence#2 40 CFR 63 (4Z) 70%CO reduction 13.59 ppm @ 15% Yes
or 23 ppmvd @ 02
15%02
Florence 43 40 CFR 63 (4Z) 70%CO reduction 15.65 ppm @ 15% Yes
or 23 ppmvd @ 02
15% 02
Manor#1 40 CFR 63 (4Z) 70%CO reduction 10.73 ppm @ 15% Yes
or 23 ppmvd @ 02
15%OZ

Ron Slack,Mooresville Regional Office,
April 07,2016
Page 2
Manor#2 40 CFR 63 (4Z) 70%CO reduction 7.05 ppm @ 15% Yes
or 23 ppmvd @ 02
15%02-
Weddington#1 40 CFR 63 (4Z) 70%CO reduction 1.01 ppm @ 15% Yes
or 23 ppmvd @ 02
15%02
Weddington#2 40 CFR 63 (4Z) 70% CO reduction 0.62 ppm @ 151/o Yes
or 23 ppmvd @ 02
15%02
40 CFR 63 Subpart 4Z requires an initial performance test to be conducted within 180 days of the
compliance date(May 3, 2013) or start up for an engine subject to the testing requirements. Subsequent
testing is required every 8760 hours of operation or three calendar years,whichever is sooner. The
engines/generators were tested at 100%load+/-10%which is representative of normal operation for these
generators as allowed under 40 CFR 63.7. During the test for the engines, inlet catalyst oxidation
temperature and pressure drop across the catalyst were measured for future continuous compliance
determinations. These are summarized in Table 2.
Table 2: Test Parameter Summary
; Test Results
Source Compliance Indicated?
Catalyst Inlet Catalyst Pressure Drop'
Tata e e
Florence#1 977 OF 2.74 in.H2O Yes
Florence#2 947 OF 2.89 in.H2O Yes
Florence#3 982 OF 3.01 in.H2O Yes
Manor#1 1068 OF. 3.45 in.H2O Yes
Manor#2 978 OF 2.92 in. H2O Yes
Weddington#1 784 OF 9.60 in.H2O Yes
Weddington#2 782 OF 9.46,in.H2O Yes
1 Catalyst inlet temperature must be between 450— 1350°F
2 Establishes baseline OP for required compliance checks.Future reading should be within+/-2 inches.
In summary,the test results are acceptable. If you have any questions,please contact me at(919) 707-
8433 or [e-mail].