AQ_F_1900134_20221118_MOD_ModRvw_pdf

DIVISION OF AIR QUALITY
November 18, 2022
MEMORANDUM
TO: Betty Gatano, Environmental Engineer, RCO
Dena Pittman, Permit Coordinator, RRO
FROM: Nancy Jone eteorologist, AQAB
THROUGH: Tom Anderson, Supervisor, Air Quality Analysis Branch(AQAB)
SUBJECT: Review of Toxics Air Dispersion Modeling—Duke Energy Progress, LLC —
Cape Fear STAR Facility
Moncure, Chatham County,North Carolina Facility No. 1900134
I have reviewed the dispersion modeling analysis, received September 6, 2022 for the Duke
Energy Cape Fear STAR Facility in Moncure, Chatham County,North Carolina. Duke Energy
submitted the modeling as an addendum to their permit application for a proposed fly ash
beneficiation process at the site of the former Cape Fear Steam Electric Plant. This application
triggered modeling requirements to evaluate those toxics whose rates are expected to exceed the
levels outlined in 15A NCAC 2Q .0700. The modeling adequately demonstrates compliance, on
a source-by-source basis, for all toxics modeled.
Seven air toxics were evaluated facility wide in the modeling. AERMOD (21112)using five
years (2014-2018) of meteorological surface data from Raleigh Durham and upper air data from
Greensboro was used to evaluate impacts. Direction-specific building dimensions, determined
using EPA's BPIP-Prime program(04274), were used as input to the model for building wake
effect determination. Receptors were spaced at 25 meters around the facility's property line and
in a nested grid out to 6,500 meters. Table 1 shows the maximum impacts as a percentage of the
AAL while Table 2 shows the optimized impacts. Source parameters and unit specific emission
rates used in the modeling are attached.
Table 1. Maximum Impacts
Duke Cape Fear STAR Facility, Moncure, Chatham County,North Carolina
Averaging Max. Cone. AAL % of
Pollutant Period ( /m3) ( /m3) AAL
Arsenic Annual 1.76E-04 2.1E-3 8
Benzene Annual 2.17E-03 0.12 2
Beryllium Annual 4.05E-05 4.1E-3 1
Cadmium Annual 1.57E-05 5.5E-3 <1
Chromium VI 24-hour 1.10E-03 0.62 <1
Nickel 24-hour 8.99E-03 6. <1
Sulfuric Acid 1-hour 7.66E-02 100 <1
24-hour 3.70E-02 12 <1

Table 2. Optimized Maximum Impacts
Duke Cape Fear STAR Facility, Moncure, Chatham County,North Carolina
Averaging Max. Conc. AAL % of
Pollutant Period /m3 /m3 AAL
Arsenic Annual 2.06E-03 2.1E-3 98
Benzene Annual 1.18E-01 0.12 98
Beryllium Annual 4.05E-03 4.1E-3 98
Cadmium Annual 5.41E-03 5.5E-3 98
Chromium VI 24-hour 6.08E-01 0.62 98
Nickel 24-hour 5.88E+00 6. 98
Sulfuric Acid 1-hour 24.4 100 24
24-hour 1.18E+01 12 98
This compliance demonstration assumes the source parameters and pollutant emission rates used
in the analysis are correct.
cc: Tom Anderson
Nancy Jones

Optimized Emissions -Duke Cape Fear STAR Facility, Moncure, Chatham County, North Carolina
Point
Source Sulfuric
ID Arsenic Benzene Beryllium Cadmium Chromium Nickel Acid
(lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr
1 EP 4 3.46E-06 6.25E-06 6.15E-06 5.86E-05 5.76E-04
2 EP 5 7.51E-03 4.40E-03 2.41E-02 3.70E-02 4.55E-01 3.18E+01
3 EP 6 1.54E-06 2.19E-06 7.57E-06 1.12E-04 1.18E-04
4 EP 7 1.00E-06 1.20E-06 6.33E-06 0.00E+00 1.41E-04
5 EP 8 1.51E-03 2.72E-03 2.68E-03 1.46E-02 1.43E-01
6 EP 9 1.51E-03 2.72E-03 2.68E-03 1.46E-02 1.43E-01
7 EP 10 3.46E-06 6.25E-06 6.15E-06 5.86E-05 5.76E-04
8 EP 11 2.87E-06 1.68E-06 9.19E-06 4.34E-05 5.33E-04
9 EP 12 1.43E-06 8.40E-07 4.60E-06 9.29E-06 1.14E-04
10 EP 13 7.16E-07 4.20E-07 2.30E-06 1.24E-05 1.52E-04
11 EP 14 7.16E-07 4.20E-07 2.30E-06 1.24E-05 1.52E-04
12 EP 22A 7.37E-05 4.69E-04 1.62E-03 2.60E-03 3.09E-03
13 EP 22B 7.37E-05 4.69E-04 1.62E-03 2.60E-03 3.09E-03
14 EP 23 1.12E-05 7.98E-02 7.13E-05 2.47E-04 3.47E-03 4.12E-03
15 EP 27A 2.42E-05 7.98E-02 1.54E-04 5.33E-04 8.56E-04 1.02E-03
16 EP 27B 2.42E-05 1.21E-02 1.54E-04 5.33E-04 8.56E-04 1.02E-03
17 EP 27C 2.42E-05 2.62E-02 1.54E-04 5.33E-04 8.56E-04 1.02E-03
18 EP 27D 2.42E-05 2.62E-02 1.54E-04 5.33E-04 8.56E-04 1.02E-03
19 EP 27E 2.42E-05 2.62E-02 1.54E-04 5.33E-04 8.56E-04 1.02E-03
20 EP 27F 2.42E-05 2.62E-02 1.54E-04 5.33E-04 8.56E-04 1.02E-03
21 EP 24 5.00E-04 2.62E-02 9.02E-04 8.87E-04 4.83E-03 4.75E-02
22 EP 25 6.17E-07 2.62E-02 1.11E-06 1.09E-06 8.79E-06 8.65E-05
Area
Source
ID Arsenic Beryllium Cadmium Chromium Nickel
lb/hr lb/hr lb/hr lb/hr lb/hr
36 EP 15A 6.78E-02 1.24E-01 1.21E-01 6.52E-01 6.44E+00

Optimized Emissions -Duke Cape Fear STAR Facility, Moncure, Chatham County, North Carolina
Volume
Source
ID Arsenic Beryllium Cadmium Chromium Nickel
(lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr
23 EP 16 8.13E-06 1.48E-05 1.45E-05 7.81E-05 7.72E-04
24 EP 17 8.13E-06 1.48E-05 1.45E-05 7.81E-05 7.72E-04
25 EP 18 8.13E-06 1.48E-05 1.45E-05 7.81E-05 7.72E-04
26 EP 1 2 1.22E-05 2.22E-05 2.18E-05 1.31 E-04 1.29E-03
27 EP 19A 4.33E-05 7.91E-05 7.75E-05 2.65E-03 2.62E-02
28 EP 19B 4.33E-05 7.91E-05 7.75E-05 2.65E-03 2.62E-02
29 EP 20 5.91E-07 1.08E-06 1.06E-06 4.98E-05 4.92E-04
30 EP 26A 9.20E-07 1.68E-06 1.64E-06 1.69E-04 1.67E-03
31 EP 26B 9.20E-07 1.68E-06 1.64E-06 1.69E-04 1.67E-03
32 EP 26C 9.20E-07 1.68E-06 1.64E-06 1.69E-04 1.67E-03
33 EP 26D 9.20E-07 1.68E-06 1.64E-06 1.69E-04 1.67E-03
34+EP 26E 9.20E-07 1.68E-06 1.64E-06 1.69E-04 1.67E-03
35P 26F 9.20E-07 1.68E-06 1.64E-06 1.69E-04 1.67E-03
Area
Polygon
Source
ID Arsenic Beryllium Cadmium Chromium Nickel
(lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr)
37 EP 15B 4.04E-02 7.38E-02 7.23E-02 3.89E-01 3.84E+00
38 EP 3 8.95E-04 1.63E-03 1.60E-03 8.61E-03 8.51E-02

Baseline Emissions -Duke Cape Fear STAR Facility, Moncure, Chatham County, North Carolina
Point
Source Sulfuric
ID Arsenic Benzene Beryllium Cadmium Chromium Nickel Acid
lb/hr lb/hr lb/hr lb/hr lb/hr lb/hr lb/hr
1 EP 4 2.96E-07 6.31E-08 1.79E-08 1.79E-08 8.81E-07
2 EP 5 6.42E-04 4.43E-05 7.02E-05 7.02E-05 6.95E-04 1.00E-01
3 EP 6 1.32E-07 2.20E-08 2.20E-08 2.20E-08 1.80E-07
4 EP 7 8.55E-08 1.22E-08 1.85E-08 1.85E-08 2.16E-07
5 EP 8 1.29E-04 2.75E-05 7.80E-06 7.80E-06 2.19E-04
6 EP 9 1.29E-04 2.75E-05 7.80E-06 7.80E-06 2.19E-04
7 EP 10 2.96E-07 6.31E-08 1.79E-08 1.79E-08 8.81E-07
8 EP 11 2.45E-07 1.69E-08 2.68E-08 2.68E-08 8.14E-07
9 EP 12 1.23E-07 8.46E-09 1.34E-08 1.34E-08 1.74E-07
10 EP 13 6.13E-08 4.23E-09 6.70E-09 6.70E-09 2.33E-07
11 EP 14 6.13E-08 4.23E-09 6.70E-09 6.70E-09 2.33E-07
12 EP 22A 6.30E-06 1.47E-03 4.72E-06 4.72E-06 4.72E-06 4.72E-06
13 EP 22B 6.30E-06 1.47E-03 4.72E-06 4.72E-06 4.72E-06 4.72E-06
14 EP 23 9.59E-07 2.24E-04 7.19E-07 7.19E-07 7.19E-07 6.30E-06
15 EP 27A 2.07E-06 4.83E-04 1.55E-06 1.55E-06 1.55E-06 1.55E-06
16 EP 27B 2.07E-06 4.83E-04 1.55E-06 1.55E-06 1.55E-06 1.55E-06
17 EP 27C 2.07E-06 4.83E-04 1.55E-06 1.55E-06 1.55E-06 1.55E-06
18 EP 27D 2.07E-06 4.83E-04 1.55E-06 1.55E-06 1.55E-06 1.55E-06
19 EP 27E 2.07E-06 4.83E-04 1.55E-06 1.55E-06 1.55E-06 1.55E-06
20 EP 27F 2.07E-06 4.83E-04 1.55E-06 1.55E-06 1.55E-06 1.55E-06
21 EP 24 4.27E-05 9.10E-06 2.58E-06 2.58E-06 7.25E-05
22 EP 25 5.27E-08 1.12E-08 3.19E-09 3.19E-09 1.32E-07
Area
Source
ID Arsenic Beryllium Cadmium Chromium Nickel
lb/hr lb/hr lb/hr lb/hr lb/hr
5.80E-
36 EP 15A 03 1.23E-03 3.51E-04 1.19E-03 9.85E-03

Baseline Emissions -Duke Cape Fear STAR Facility, Moncure, Chatham County, North Carolina
Volume
Source
ID Arsenic Beryllium Cadmium Chromium Nickel
lb/hr lb/hr lb/hr lb/hr lb/hr
23 EP 16 6.95E-07 1.48E-07 4.20E-08 1.42E-07 1.18E-06
24 EP 17 6.95E-07 1.48E-07 4.20E-08 1.42E-07 1.18E-06
25 EP 18 6.95E-07 1.48E-07 4.20E-08 1.42E-07 1.18E-06
26 EP1 2 1.04E-06 2.22E-07 6.31E-08 2.38E-07 1.97E-06
27 EP 19A 3.71E-06 7.89E-07 2.24E-07 4.84E-06 4.01E-05
28 EP 19B 3.71E-06 7.89E-07 2.24E-07 4.84E-06 4.01E-05
29 EP 20 5.05E-08 1.08E-08 3.06E-09 9.07E-08 7.52E-07
30 EP 26A 7.86E-08 1.67E-08 4.76E-09 3.08E-07 2.55E-06
31 EP 26B 7.86E-08 1.67E-08 4.76E-09 3.08E-07 2.55E-06
32 EP 26C 7.86E-08 1.67E-08 4.76E-09 3.08E-07 2.55E-06
33 EP 26D 7.86E-08 1.67E-08 4.76E-09 3.08E-07 2.55E-06
34 EP 26E 7.86E-08 1.67E-08 4.76E-09 3.08E-07 2.55E-06
35 EP 26F 7.86E-08 1.67E-08 4.76E-09 3.08E-07 2.55E-06
Area
Polygon
Source ID Arsenic Beryllium Cadmium Chromium Nickel
lb/hr lb/hr lb/hr lb/hr lb/hr
37 EP 15B 3.46E-03 7.36E-04 2.09E-04 7.08E-04 5.87E-03
38 EP 3 7.66E-05 1.63E-05 4.63E-06 1.57E-05 1.30E-04

Release Characteristics -Duke Cape Fear STAR Facility, Moncure, Chatham County, North Carolina
Point
Source Stack Release Easting Northing Base Stack Exit Stack
ID Type X Y Elevation Height Temp. Velocity Diameter
m m m ft °F (fps) ft
1 EP 4 HORIZONTAL 678183 3939923 59 135 200 2.49 8.37
2 EP 5 DEFAULT 678228 3939938 59 140 202 57.74 5.25
3 EP 6 HORIZONTAL 678235 3939925 59 76 190 22.51 1.80
4 EP 7 HORIZONTAL 678229 3939914 59 80 Ambient 22.51 1.80
5 EP 8 DEFAULT 678195 3939953 59 96 250 109.12 3.51
6 EP 9 DEFAULT 678180 3939955 59 96 250 109.12 3.51
7 EP 10 HORIZONTAL 678181 3939948 59 92 200 2.49 7.41
8 EP 11 HORIZONTAL 678208 3939831 59 138 335 2.49 8.76
9 EP 12 HORIZONTAL 678245 3939833 59 104 335 2.49 8.76
10 EP 13 HORIZONTAL 678248 3939827 59 28 335 2.49 8.76
11 EP 14 HORIZONTAL 678242 3939826 59 28 335 2.49 8.76
12 EP 22A HORIZONTAL 677243 3940492 52 4 800 135.83 0.26
13 EP 22B HORIZONTAL 677252 3940509 52 4 800 135.83 0.26
14 EP 23 HORIZONTAL 677236 3940496 52 8 800 136.22 0.49
15 EP 27A DEFAULT 677300 3940527 52 4 800 135.83 0.26
16 EP 27B DEFAULT 677317 3940517 52 4 800 135.83 0.26
17 EP 27C DEFAULT 677283 3940541 52 4 800 135.83 0.26
18 EP 27D DEFAULT 677279 3940518 52 4 800 135.83 0.26
19 EP 27E DEFAULT 677299 3940509 52 4 800 135.83 0.26
20 EP 27F DEFAULT 677323 3940493 52 4 800 135.83 0.26
2 IL EP 24 DEFAULT 678215 3939996 59 58 170 69.95 1.84
22 EP 25 DEFAULT 678211 3940007 59 51 250 60.50 0.82
Angle
Area Easting Northing Base Release Easterly Northerly from Initial Vert.
Source ID (X) (Y) Elevation Hei ht Len th Len th North Dimension
m m m ft ft ft ft
36 EP 15A 677129 3940394 52 7 1503 781 39 0

Release Characteristics -Duke Cape Fear STAR Facility, Moncure, Chatham County, North Carolina
Initial
Volume Easting Northing Base Release Init. Hor. Vert.
Source ID X Y Elevation Height Dimension Dimension
(m) (m) m ft ft (ft
23 EP 16 677281 3940481 52 5 2.33 4.69
24 EP 17 677251 3940487 52 5 2.33 4.69
25 EP 18 677261 3940478 52 5 2.33 4.69
26 EP1 2 678204 3940046 59 5 2.33 4.69
27 EP 19A 677243 3940492 52 5 2.33 4.69
28 EP 19B 677252 3940509 52 5 2.33 4.69
29 EP 20 677236 3940496 52 5 2.33 4.69
30 EP 26A 677300 3940527 52 5 2.33 4.69
31 EP 26B 677317 3940517 52 5 2.33 4.69
32 EP 26C 677283 3940541 52 5 2.33 4.69
33 EP 26D 677279 3940518 52 5 2.33 4.69
34 EP 26E 677299 3940509 52 5 2.33 4.69
35 EP 26F 677323 3940493 52 5 2.33 4.69
Area Number Initial
Polygon Base Release of Vert.
Source ID Elevation Height Vertices Dimension
m ft ft
37 EP 15B 52 7 23 0
38 EP 3 59 4 5 0