APPENDIX G 

DEQ CALPUFF Impact Analysis Report 

 
8th Highesta Total Daysb 8th Highest Total Days 8th Highest Total Days

DEQ SCENARIOS

Base Riley Boiler Scenario (wzI10471) 0.721 15 1.086 41 1.109 41 

NOx Control Scenario 1 - LNB (wzI10472) 0.511 11 0.822 29 0.871 29 

NOx Control Scenario 2 - LNB w/ OFA (wzI10473) 0.454 7 0.743 24 0.803 25 

NOx control scenario 3 - SCR (wzI10474) 0.383 6 0.625 16 0.653 18 

SO2 Control Scenario 1 - Lower Sulfur Coal (wzI10475) 0.682 15 1.016 39 1.028 36 

SO2 Control Scenario 2 - Dry Lime Injection (wzI10476) 0.586 9 0.814 28 0.806 29 

SO2 Control Scenario 3 - Dry Trona Injection (wzI10477) 0.565 9 0.764 24 0.739 25 

SO2 control Scenario 4 - Spray Dry FGD (wzI10478) 0.527 9 0.703 22 0.707 20 

SO2 Control Scenario 5 - Wet FGD (wzI10479) 0.499 7 0.647 19 0.645 17 

NOx Scenario 1 + SO2 Scenario 3 (wzI10480) 0.329 5 0.483 6 0.480 6 NOx Scenario 1 + SO2 Scenario 4 (wzI10481) 0.294 3 0.402 2 0.417 3 NOx Scenario 1 + SO2 Scenario 5 (wzI10482) 0.270 2 0.359 1 0.352 2 NOx Scenario 2 + SO2 Scenario 3 (wzI10483) 0.258 2 0.395 2 0.394 3 

NOx Scenario 2 + SO2 Scenario 4 (wzI10484) 0.228 1 0.319 1 0.330 1 

NOx Scenario 2 + SO2 Scenario 5 (wzI10485) 0.201 1 0.271 0 0.263 0 

ENVIRON SCENARIOSe

Base (Riley + Pulp Dryers) 0.956 23 1.454 49 1.388 55 

DEQ - wzI10471 0.721 15 1.086 41 1.109 41 

Riley (LNB w OFA) + Pulp Dryers 0.713 16 1.124 40 1.055 38 

DEQ - wzI10472 0.511 11 0.822 29 0.871 29 

Riley (LNB & FGD) + Pulp Dryers 0.510 9 0.789 26 0.686 22 

DEQ - wzI10486 0.467 7 0.715 20 0.618 17 DEQ - wzI10484 0.228 1 0.319 1 0.330 1 

d. Total number of days in the 3-year period that exceed 0.5 delta-deciviews.e. Scenarios below this line were modeled and compiled by Environ International Corporation under contract with TASCO 

Control Scenario (Model Run ID)

Change in Visibility Compared Against 20% Best Days Natural Bac

Delta-Deciview Value Larger Than 0.5 From One Year Period

2003 2004 2005 

TASCO Nampa Riley Boiler BART Determination Modeling Results (Eagle Cap Wilderness

a. The 8th highest delta-deciview for the calendar year.

b. Total number of days in 1 year that exceeded 0.5 delta-deciviews.c. The 22nd highest delta-deciview value for the 3-year period.
8th Highesta Total Daysb 8th Highest Total Days 8th Highest Total Days

DEQ SCENARIOS

Base Riley Boiler Scenario (wzI10471) 0.577 9 0.888 20 0.763 19 

NOx Control Scenario 1 - LNB (wzI10472) 0.421 7 0.657 14 0.595 10 

NOx Control Scenario 2 - LNB w/ OFA (wzI10473) 0.373 5 0.589 13 0.545 10 

NOx control scenario 3 - SCR (wzI10474) 0.300 4 0.505 9 0.457 7 

SO2 Control Scenario 1 - Lower Sulfur Coal (wzI10475) 0.541 8 0.822 17 0.706 16 

SO2 Control Scenario 2 - Dry Lime Injection (wzI10476) 0.440 7 0.646 11 0.545 10 

SO2 Control Scenario 3 - Dry Trona Injection (wzI10477) 0.417 5 0.602 11 0.505 9 

SO2 control Scenario 4 - Spray Dry FGD (wzI10478) 0.402 5 0.555 9 0.470 5 

SO2 Control Scenario 5 - Wet FGD (wzI10479) 0.382 4 0.500 8 0.413 2 

NOx Scenario 1 + SO2 Scenario 3 (wzI10480) 0.255 3 0.387 2 0.324 1 NOx Scenario 1 + SO2 Scenario 4 (wzI10481) 0.236 1 0.323 1 0.268 0 NOx Scenario 1 + SO2 Scenario 5 (wzI10482) 0.207 1 0.268 0 0.228 0 NOx Scenario 2 + SO2 Scenario 3 (wzI10483) 0.206 1 0.319 1 0.267 0 

NOx Scenario 2 + SO2 Scenario 4 (wzI10484) 0.187 1 0.255 0 0.214 0 

NOx Scenario 2 + SO2 Scenario 5 (wzI10485) 0.154 0 0.200 0 0.172 0 

ENVIRON SCENARIOSe

Base (Riley + Pulp Dryers) 0.799 16 1.056 30 0.954 32 

DEQ - wzI10471 0.577 9 0.888 20 0.763 19 

Riley (LNB w OFA) + Pulp Dryers 0.600 9 0.871 19 0.711 16 

DEQ - wzI10472 0.421 7 0.658 14 0.595 10 

Riley (LNB & FGD) + Pulp Dryers 0.436 6 0.617 12 0.460 6 

DEQ - wzI10486 0.389 4 0.572 9 0.409 2 

DEQ - wzI10484 0.187 1 0.255 0 0.214 0 

d. Total number of days in the 3-year period that exceed 0.5 delta-deciviews.

TASCO Nampa Riley Boiler BART Determination Modeling Results (Hells Canyon National Recrea

a. The 8th highest delta-deciview for the calendar year.

b. Total number of days in 1 year that exceeded 0.5 delta-deciviews.c. The 22nd highest delta-deciview value for the 3-year period.

e. Scenarios below this line were modeled and compiled by Environ International Corporation under contract with TASCO 

Control Scenario (Model Run ID)

Change in Visibility Compared Against 20% Best Days Natural Bac

Delta-Deciview Value Larger Than 0.5 From One Year Period

2003 2004 2005 
8th Highesta Total Daysb 8th Highest Total Days 8th Highest Total Days

DEQ SCENARIOS

Base Riley Boiler Scenario (wzI10471) 0.207 1 0.249 1 0.208 0 

NOx Control Scenario 1 - LNB (wzI10472) 0.141 0 0.189 1 0.154 0 

NOx Control Scenario 2 - LNB w/ OFA (wzI10473) 0.121 0 0.172 1 0.142 0 

NOx control scenario 3 - SCR (wzI10474) 0.101 0 0.147 1 0.122 0 

SO2 Control Scenario 1 - Lower Sulfur Coal (wzI10475) 0.195 0 0.226 1 0.199 0 

SO2 Control Scenario 2 - Dry Lime Injection (wzI10476) 0.166 0 0.171 0 0.145 0 

SO2 Control Scenario 3 - Dry Trona Injection (wzI10477) 0.156 0 0.159 0 0.130 0 

SO2 control Scenario 4 - Spray Dry FGD (wzI10478) 0.150 0 0.147 0 0.114 0 

SO2 Control Scenario 5 - Wet FGD (wzI10479) 0.141 0 0.137 0 0.108 0 

NOx Scenario 1 + SO2 Scenario 3 (wzI10480) 0.093 0 0.102 0 0.089 0 NOx Scenario 1 + SO2 Scenario 4 (wzI10481) 0.084 0 0.085 0 0.068 0 NOx Scenario 1 + SO2 Scenario 5 (wzI10482) 0.077 0 0.074 0 0.058 0 NOx Scenario 2 + SO2 Scenario 3 (wzI10483) 0.073 0 0.086 0 0.076 0 

NOx Scenario 2 + SO2 Scenario 4 (wzI10484) 0.064 0 0.066 0 0.057 0 

NOx Scenario 2 + SO2 Scenario 5 (wzI10485) 0.058 0 0.056 0 0.044 0 

ENVIRON SCENARIOSe

Base (Riley + Pulp Dryers) 0.318 2 0.327 3 0.268 0 

DEQ - wzI10471 0.207 1 0.249 1 0.208 0 

Riley (LNB w OFA) + Pulp Dryers 0.223 1 0.255 2 0.203 0 

DEQ - wzI10472 0.141 0 0.189 1 0.154 0 

Riley (LNB & FGD) + Pulp Dryers 0.176 0 0.222 1 0.126 0 

DEQ - wzI10486 0.158 0 0.222 1 0.115 0 DEQ - wzI10484 0.064 0 0.066 0 0.057 0 

d. Total number of days in the 3-year period that exceed 0.5 delta-deciviews.e. Scenarios below this line were modeled and compiled by Environ International Corporation under contract with TASCO 

Control Scenario (Model Run ID)

Change in Visibility Compared Against 20% Best Days Natural Bac

Delta-Deciview Value Larger Than 0.5 From One Year Period

2003 2004 2005 

TASCO Nampa Riley Boiler BART Determination Modeling Results (Sawtooth Wilderness

a. The 8th highest delta-deciview for the calendar year.

b. Total number of days in 1 year that exceeded 0.5 delta-deciviews.c. The 22nd highest delta-deciview value for the 3-year period.