sulfate-to-SO2 Class I Area ST Sulfate Nitrate OC EC Soil Coarse Big Bend Nat'l Park TX 0.77 0.05 0.28 0.03 0.42 1.43 -0.004 Boundary Waters MN 0.22 0.19 0.15 0.02 0.03 0.27 -0.006 Breton Island LA 0.08 0.01 0.02 0.01 0.01 0.11 -0.0001 Caney Creek AR -0.0002 Guadalupe Mountains TX 0.53 0.16 0.25 0.02 0.50 2.97 -0.004 Hercules-Glades MO -0.00019 Mingo MO -0.0002 Upper Buffalo AR -0.0002 Voyageurs MN 0.09 0.14 0.23 0.02 0.04 0.44 -0.006 Wichita Mountains OK 0.09 0.06 0.07 0.01 0.01 0.11 -0.001 Mammoth Cave KY -0.005 Sipsey Wilderness AL -0.007 Isle Royale MI 0.19 0.07 0.14 0.02 0.03 0.34 -0.006 Badlands SD 0.50 0.16 0.36 0.03 0.14 1.16 -0.008 Great Sand Dunes CO 0.19 0.08 0.29 0.02 0.38 1.13 -0.02 Lostwood Wilderness ND 0.75 0.69 0.52 0.05 0.09 1.05 -0.008 Rocky Mtn Nat'l Park CO 0.19 0.11 0.24 0.03 0.17 0.69 -0.02 Salt Creek NM 0.73 0.51 0.39 0.05 0.93 2.26 -0.004 Theodore Roosevlt ND 0.33 0.34 0.57 0.06 0.13 1.15 -0.008 Wheeler Peak NM 0.15 0.03 0.19 0.03 0.24 0.32 -0.08 White Mountain NM 0.21 0.06 0.28 0.03 0.21 0.84 -0.08 Wind Cave SD 0.32 0.20 0.36 0.05 0.13 0.59 -0.008

sulfate-to-SO2 Class I Area ST Sulfate Nitrate OC EC Soil Coarse Big Bend Nat'l Park TX 1.25 1.25 1.97 0.79 7.88 13.13 -0.004 Boundary Waters MN 0.51 0.51 1.27 0.51 5.08 8.46 -0.006 Breton Island LA 0.12 0.12 0.33 0.13 1.31 2.19 -0.0001 Caney Creek AR -0.0002 Guadalupe Mountains TX 1.34 1.34 1.81 0.72 7.23 12.05 -0.004 Hercules-Glades MO -0.00019 Mingo MO -0.0002 Upper Buffalo AR -0.0002 Voyageurs MN 0.37 0.37 0.95 0.38 3.81 6.35 -0.006 Wichita Mountains OK 0.21 0.21 0.40 0.16 1.61 2.68 -0.001 Mammoth Cave KY -0.005 Sipsey Wilderness AL -0.007 Isle Royale MI 0.35 0.35 0.92 0.37 3.67 6.12 -0.006 Badlands SD 0.99 0.99 1.93 0.77 7.73 12.88 -0.008 Great Sand Dunes CO 0.68 0.68 1.02 0.41 4.07 6.78 -0.02 Lostwood Wilderness ND 1.82 1.82 3.96 1.58 15.85 26.41 -0.008 Rocky Mtn Nat'l Park CO 0.59 0.59 0.94 0.37 3.74 6.24 -0.02 Salt Creek NM 2.05 2.05 2.77 1.11 11.09 18.49 -0.004 Theodore Roosevlt ND 1.00 1.00 2.77 1.11 11.07 18.45 -0.008 Wheeler Peak NM 0.45 0.45 0.63 0.25 2.54 4.23 -0.08 White Mountain NM 0.67 0.67 0.90 0.36 3.60 6.00 -0.08 Wind Cave SD 0.85 0.85 1.60 0.64 6.39 10.65 -0.008 Control (ug/m3) (ug/m3/to n Level Proportional Reduction Requirements (ug/m3) (ug/m3/to n

Reduction Requirement Assuming Single Species LevelRequired SO2 Required NOX nitrate-to-NOX Emissions Reductions Emissions Reductions (tons / year) (tons / year) -0.002 73,000 8,000 -0.004 13,000 19,000 -0.000007 226,000 572,000 -0.00001 -0.01 50,000 4,000 0.0000 -0.00001 -0.00001 -0.004 5,700 14,000 -0.005 32,000 4,500 -0.001 -0.001 -0.004 11,000 7,000 -0.001 23,000 45,000 -0.003 3,400 10,000 -0.01 35,000 19,000 -0.007 3,500 5,800 -0.01 68,800 13,000 -0.01 15,000 12,000 -0.01 690 800 -0.01 990 1,500 -0.001 15,000 56,000

Required SO2 Required NOX nitrate-to-NOX Emissions Reductions Emissions Reductions (tons / year) (tons / year) -0.002 120,000 210,000 -0.004 32,000 51,000 -0.000007 308,000 6,010,000 -0.00001 -0.01 130,000 33,000 0.0000 -0.00001 -0.00001 -0.004 23,000 37,000 -0.005 75,000 15,000 -0.001 -0.001 -0.004 22,000 35,000 -0.001 46,000 280,000 -0.003 12,000 82,000 -0.01 84,000 52,000 -0.007 11,000 31,000 -0.01 192,800 50,000 -0.01 45,000 36,000 -0.01 2,100 11,000 -0.01 3,100 16,000 -0.001 39,000 240,000 n reduced)

1 AOI

n reduced)

1 AOI