For sources affected by a change in a production rate (i.e., debottlenecking), G-P determined an emission increase by calculating the amount of emissions attributable to the production rate change. Table D-5 presents the emission changes associated with the project at affected emission sources for particulate matter.
Table D-5
Model ID
Source Description
Project Emission Rates
(TPY)
(g/s)
Steam Production by Boilers (a)
Stack1
Boilers 1 and 2
34.824
1.002
Stack3
Boilers 3 and 4
34.824
1.002
Associated Fuel Handling for Steam Production
RCUN
Railcar Unload
0.008
0.00024
STKER
Coal Stacker
0.008
0.00024
CRUSHER
Coal Crusher
0.11
0.0105
GRIZZLY
Coal Grizzly
0.008
0.00024
BNKXF
Bunker Coal Transfer
0.73
0.021
Roads
RDA1..A39
Main Gate to 1st intersection
0.108
0.003
RDB1..B57
1st Intersection to Coal Pile
0.006
0.000
RDC1..C28
1st Intersection to Shipping/Rcv
0.079
0.002
RDD1..D300
Ash Management
1.149
0.033
(a) Steam increase can be produced by any boiler. The total PM10 emission increase attributable to the project for steam is 2.0 grams/sec. The emission rate reflects the permit limit of 0.1 lbs/MMBtu. The analysis to determine project impact divided these emissions equally between the two stacks.
Tables D-6, D-7, and D-8 present the project emissions for sulfur dioxide, nitrogen oxides, and carbon monoxide, respectively.
Table D-6
Model ID
Source Description
Annual Fuel Usage (MMBTU)
SO2 Emission Rates for Significant Impact Analysis
(a) Net Emission Rate increase reflects an attributable heat input of 643,860 MMBtu/yr or 73.5 MMBtu/hr and worst-case fuel. Attributable Boiler Emissions may be exhausted via either Stack 1 or Stack 2. Total attributable emissions are equal to 73.5 MMBtu/hr x 1.2 lbs SO2/MMBtu x 454 g/lb x hr/3,600s = 11.13 gram/s
Table D-7
Model ID
Source Description
Annual Fuel Usage (MMBTU)
NOX Emission Rates for Significant Impact Analysis
(a) Net Emission Rate increase reflects an attributable heat input of 643,860 MMBtu/yr or 73.5 MMBtu/hr and worst-case fuel. Attributable Boiler Emissions may be exhausted via either Stack 1 or Stack 2. Actual model runs applied two source groups for these two cases. Total attributable emissions are equal to 73.5 MMBtu/hr x 0.7 lbs NOx/MMBtu x 454 g/lb x hr/3,600s = 6.48 gram/s.
Table D-8
Model ID
Source Description
Annual Fuel Usage (MMBTU)
CO Emission Rates for Significant Impact Analysis
Baseline (TPY)
Potential (TPY)
Project (TPY)
Project (g/s)
Baseline
Potential
Modified Sources
1112_8
PM 11 Yankee Wet End
56813.5
306600
10.510
56.72
46.21
1.33
1112_7
PM 11 Yankee Dry End
56813.5
306600
10.510
56.72
46.21
1.33
1112_20
PM12 Yankee Exh
197251
613200
28.601
88.91
60.31
1.74
13_13
PM 13 Yankee Economizer
159772
613200
23.167
88.91
65.75
1.89
14_13
PM 14 Yankee Wet End
55868
306600
12.291
67.45
55.16
1.59
14_17
PM 14 Yankee Dry End
55868
306600
12.291
67.45
55.16
1.59
15_13
PM 15 Yankee Wet End
46840
306600
10.305
48.18
37.88
1.09
15_18
PM 15 Yankee Dry End
46840
306600
10.305
48.18
37.88
1.09
PPRTO
Proposed Press RTO
0
26280
0
3.68
3.68
0.11
Affected Sources
Stack1
Boilers 1 and 2 (a)
NA
NA
NA
NA
13.5
0.39
Stack3
Boilers 3 and 4 (a)
NA
NA
NA
NA
13.5
0.39
Totals
117.98
285.75
194.81
5.60
(a) Net Emission Rate increase reflects an attributable heat input of 643,860 MMBtu/yr or 73.5 MMBtu/hr and worst-case fuel. Attributable Boiler Emissions may be exhausted via either Stack 1 or Stack 2. Actual model runs applied two source groups for these two cases. Total attributable emissions are equal to 73.5 MMBtu/hr x 0.084 lbs CO/MMBtu x 454 g/lb x hr/3,600s = 0.78 gram/s.
G-P modeled point sources using the POINT source type. Table D-9 presents source modeling parameters for POINT sources.