**1st high Receptor**  **2nd high**

**Receptor 3rd high** 

**Receptor 4th high** 

**Receptor** Modeled Concentration from units 1 + 2 (ug/m3)* 847.27 814.99 831.13 840.32 Modeled Concentration from unit 5 (ug/m3) 0.39 1.14 2.62 0.28

Background Concentration + unit 5 (ug/m3) 13.49 40.43 23.58 13.38 1-Hr SO2 NAAQS (ug/m3) 196.2 196.2 196.2 196.2

**% Reduction needed to meet NAAQS 78.4%**  **80.9% 79.2%**  **78.2%**

*Modeled concentrations are based on the 99th-percentile (4th high) of the annual distribution of daily maximum 1-hour values. 

## Portland Generating Station Final Rule Emissions Reduction Calculations**5th high**

**Receptor**

806.19

1.28

40.57

196.2

**80.7%** Modeled concentrations are based on the 99th-percentile (4th high) of the annual distribution of dailyX-coord Y-coord RecElv HillElv Rank Grid Unit 1 Unit 2 Unit 5

4944004531500 157 178 4TH PGS100 380.37 466.90 0.39 4944004531600 159 171 4TH PGS100 367.42 447.57 1.14 4945004531600 168 172 4TH PGS100 384.00 447.13 2.62 4944004531400 157 177 4TH PGS100 379.87 460.45 0.28 4959004529600 221 221 4TH PGS100 363.12 443.07 1.28 4944004531700 156 161 4TH PGS100 361.30 444.61 1.36 4945004531700 163 171 4TH PGS100 363.20 442.73 1.04 4945004531800 157 157 4TH PGS100 360.15 444.30 1.25 4960004529600 226 238 4TH PGS100 354.99 448.62 1.22 4943004531200 156 156 4TH PGS100 382.92 435.86 2.21 4945004531900 150 150 4TH PGS100 355.59 443.26 1.46 4944004531300 159 164 4TH PGS100 375.91 449.21 0.19 4955004529400 198 198 4TH PGS100 360.42 451.97 1.96 4959004529500 219 237 4TH PGS100 330.48 463.83 0.87 4944004531800 149 161 4TH PGS100 354.45 440.21 1.58 4946004531900 148 189 4TH PGS100 354.92 438.56 1.13 4945004531500 170 176 4TH PGS100 363.65 430.30 0.64 4946004532000 143 189 4TH PGS100 352.38 440.33 1.33 4945004532000 132 189 4TH PGS100 350.60 441.65 1.65 4954004529200 206 217 4TH PGS100 231.97 554.18 1.56 4946004532100 139 184 4TH PGS100 348.21 439.20 1.53 4946004531800 158 187 4TH PGS100 355.10 432.72 0.93 4956004529400 203 203 4TH PGS100 351.61 450.84 1.89 4958004529500 216 221 4TH PGS100 336.55 448.46 0.90 4943004531100 153 153 4TH PGS100 374.76 399.93 0.39 4954004529400 190 215 4TH PGS100 356.49 427.97 0.83 4944004531900 136 187 4TH PGS100 347.25 435.09 1.78 4961004529700 224 239 4TH PGS100 355.40 426.86 1.47 4945004532100 119 189 4TH PGS100 344.09 437.22 1.84 4946004532200 127 202 4TH PGS100 343.42 437.17 1.72 4945004531400 166 166 4TH PGS100 361.32 420.23 0.47 4960004529700 217 239 4TH PGS100 360.45 418.05 1.54 4962004529700 232 234 4TH PGS100 254.18 518.58 2.59 4946004531700 166 181 4TH PGS100 353.23 423.70 0.75 4957004529400 207 221 4TH PGS100 341.85 447.76 1.83 4947004532200 139 190 4TH PGS100 342.33 431.89 1.40 4947004532100 146 185 4TH PGS100 344.14 429.46 1.22 4958004529600 220 220 4TH PGS100 361.15 409.69 1.27 4946004532300 112 207 4TH PGS100 337.98 434.08 1.90 4947004532300 128 204 4TH PGS100 339.36 432.47 1.59 4944004531200 158 158 4TH PGS100 367.32 431.20 0.12 4957004529500 212 221 4TH PGS100 339.73 428.74 0.93 4961004529600 237 237 4TH PGS100 245.04 521.82 2.39 4942004531000 144 145 4TH PGS100 371.16 415.87 1.89 4947004532000 151 187 4TH PGS100 344.47 424.64 1.03 4947004532400 110 207 4TH PGS100 335.75 432.21 1.764945004532200 110 203 4TH PGS100 336.72 430.92 2.02

4959004529700 211 239 4TH PGS100 362.62 405.33 1.60 4943004531400 150 153 4TH PGS100 359.59 431.64 0.37 4946004532400 97 207 4TH PGS100 332.49 430.45 2.06Units 1&2Backgrnd ALL

847.27 13.10 860.76 814.99 39.30 855.42 831.13 20.96 854.71 840.32 13.10 853.70 806.19 39.30 846.76 805.91 39.30 846.57 805.92 39.30 846.26 804.44 39.30 844.99 803.61 39.30 844.12 818.78 20.96 841.95 798.84 39.30 839.60 825.12 13.10 838.42 812.39 23.58 837.93 794.31 41.92 837.10 794.66 39.30 835.54 793.48 39.30 833.90 793.95 39.30 833.89 792.71 39.30 833.33 792.25 39.30 833.20 786.15 41.92 829.62 787.42 39.30 828.25 787.83 39.30 828.06 802.45 23.58 827.92 785.00 41.92 827.82 774.69 49.78 824.85 784.46 39.30 824.59 782.34 39.30 823.41 782.26 39.30 823.03 781.30 39.30 822.45 780.58 39.30 821.60 781.55 39.30 821.32 778.49 39.30 819.33 772.76 41.92 817.26 776.94 39.30 816.98 789.62 23.58 815.03 774.22 39.30 814.92 773.60 39.30 814.11 770.83 41.92 814.02 772.06 39.30 813.26 771.83 39.30 812.72 798.51 13.10 811.74 768.47 41.92 811.32 766.86 41.92 811.17 787.03 20.96 809.88 769.11 39.30 809.43 767.96 39.30 809.02767.64 39.30 808.97

767.95 39.30 808.86 791.22 13.10 804.69 762.94 39.30 804.30