NC1

Modeling Scenarios for BART Analysis

Maximum

24-h avg. actual Filterable**

heat input* SO2 E.F. NOx E.F. PM E. F.

SO2 NOx PM (MMBtu/hr) (lb/mmBtu) (lb/mmBtu) (lb/mmBtu)

no control none ESP 6441.4 0.857 0.603 0.03660

no control LNB/OFA ESP 6441.4 0.857 0.23 0.03660

SDA LNB/OFA FF 6441.4 0.15 0.23 0.00823

SDA LNB/OFA+SCR FF 6441.4 0.15 0.08 0.00823

SDA none FF 6441.4 0.15 0.603 0.00823

* Maximum daily heat input for 2001 - may not coincide with 24-hour maximum SO2 and NOx emissions in 2001.

** Filterable PM emissions after FF based on NPPD stack tests. Condensable PM emissions assumed to be 0.014 lb/mmBtu, 

Control Description
SO2 NOx PMC PMF Temp. Vel.

(g/sec) (g/sec) (g/sec) (g/sec) (deg. K) (m/sec)

695.71 489.62 11.88 21.02 467.05 18.47

695.71 186.67 11.88 21.02 467.05 18.47

121.74 186.67 2.14 13.77 352.04 24.08

121.74 64.93 2.14 13.77 352.04 24.08

121.74 489.62 2.14 13.77 352.04 24.08

ssions in 2001.

umed to be 0.014 lb/mmBtu, based on AP-42 and 0.44% sulfur.

Modeled Emissions Stack Parameters
Nebraska City Station Unit 1 (OPPD)

Regional Haze, BART-Subject Modeling, Summary of CALPUFF Visibility Impacts

Predicted 24-hour Values in Deciviews

BASELINE Scenario

# Exceed. 8th-High # Exceed. 8th-High # Exceed. 8th-High

Badlands (SD) 7 0.332 2 0.126 2 0.225

Great Sand Dunes (CO) 0 0.009 0 0.019 0 0.036

Hercules Glades (MO) 14 0.933 9 0.556 6 0.473

Mingo (MO) 4 0.374 5 0.371 2 0.305

Rocky Mountain (CO) 0 0.01 0 0.043 2 0.047

Wichita Mountains (OK) 4 0.306 5 0.381 10 0.686

Wind Cave (SD) 4 0.095 1 0.050 1 0.111

Notes: 

1) Exceedances are the number of annual values exceeding the threshold of 0.5 deciviews

2) The 8th-high values represent the 98th percentile value in a year, and are reported in units of deciviews.

Class I Area

Year of Meteorology

2001 2002 2003
Nebraska City Station Unit 1 (OPPD)

Regional Haze, BART-Subject Modeling, Summary of CALPUFF Visibility Impacts

Predicted 24-hour Values in Deciviews

LNB/OFA

# Exceed. 8th-High # Exceed. 8th-High # Exceed. 8th-High

Badlands (SD) 5 0.258 0 0.09 0 0.182

Great Sand Dunes (CO) 0 0.007 0 0.016 0 0.03

Hercules Glades (MO) 9 0.621 2 0.358 1 0.324

Mingo (MO) 1 0.269 2 0.232 1 0.212

Rocky Mountain (CO) 0 0.009 0 0.033 2 0.036

Wichita Mountains (OK) 2 0.233 1 0.275 9 0.524

Wind Cave (SD) 2 0.08 0 0.044 0 0.105

Notes: 

1) Exceedances are the number of annual values exceeding the threshold of 0.5 deciviews

2) The 8th-high values represent the 98th percentile value in a year, and are reported in units of deciviews.

Class I Area

Year of Meteorology

2001 2002 2003
Nebraska City Station Unit 1 (OPPD)

Regional Haze, BART-Subject Modeling, Summary of CALPUFF Visibility Impacts

Predicted 24-hour Values in Deciviews

SDA + LNB/OFA

# Exceed. 8th-High # Exceed. 8th-High # Exceed. 8th-High

Badlands (SD) 1 0.084 0 0.043 0 0.051

Great Sand Dunes (CO) 0 0.002 0 0.003 0 0.007

Hercules Glades (MO) 0 0.233 1 0.159 0 0.14

Mingo (MO) 0 0.095 0 0.103 0 0.08

Rocky Mountain (CO) 0 0.002 0 0.009 0 0.011

Wichita Mountains (OK) 0 0.069 0 0.109 2 0.165

Wind Cave (SD) 0 0.022 0 0.014 0 0.028

Notes: 

1) Exceedances are the number of annual values exceeding the threshold of 0.5 deciviews

2) The 8th-high values represent the 98th percentile value in a year, and are reported in units of deciviews.

Class I Area

Year of Meteorology

2001 2002 2003
Nebraska City Station Unit 1 (OPPD)

Regional Haze, BART-Subject Modeling, Summary of CALPUFF Visibility Impacts

Predicted 24-hour Values in Deciviews

SDA + LNB/OFA + SCR

# Exceed. 8th-High # Exceed. 8th-High # Exceed. 8th-High

Badlands (SD) 1 0.055 0 0.026 0 0.031

Great Sand Dunes (CO) 0 0.001 0 0.003 0 0.006

Hercules Glades (MO) 0 0.14 0 0.084 0 0.072

Mingo (MO) 0 0.064 0 0.049 0 0.052

Rocky Mountain (CO) 0 0.002 0 0.007 0 0.007

Wichita Mountains (OK) 0 0.053 0 0.063 0 0.112

Wind Cave (SD) 0 0.016 0 0.010 0 0.018

Notes: 

1) Exceedances are the number of annual values exceeding the threshold of 0.5 deciviews

2) The 8th-high values represent the 98th percentile value in a year, and are reported in units of deciviews.

Class I Area

Year of Meteorology

2001 2002 2003
Nebraska City Station Unit 1 (OPPD)

Regional Haze, BART-Subject Modeling, Summary of CALPUFF Visibility Impacts

Predicted 24-hour Values in Deciviews

SDA

# Exceed. 8th-High # Exceed. 8th-High # Exceed. 8th-High

Badlands (SD) 4 0.16 0 0.07 0 0.077

Great Sand Dunes (CO) 0 0.003 0 0.004 0 0.014

Hercules Glades (MO) 8 0.53 4 0.355 1 0.308

Mingo (MO) 1 0.2 0 0.236 1 0.147

Rocky Mountain (CO) 0 0.003 0 0.013 1 0.021

Wichita Mountains (OK) 2 0.153 1 0.205 6 0.331

Wind Cave (SD) 2 0.038 0 0.024 0 0.05

Notes: 

1) Exceedances are the number of annual values exceeding the threshold of 0.5 deciviews

2) The 8th-high values represent the 98th percentile value in a year, and are reported in units of deciviews.

Class I Area

Year of Meteorology

2001 2002 2003