2006 0.00 0.01 0.02 0.03 0.08 0.11 0.03 0.08 0.11 0.09 0.26 0.35 0.14 0.39 0.52 0.63 1.79 2.41 0.23 0.65 0.88 0.53 1.51 2.04 0.07 0.19 0.25 2007 0.01 0.03 0.04 0.07 0.20 0.27 0.07 0.20 0.27 0.22 0.62 0.83 0.32 0.92 1.24 1.49 4.25 5.74 0.54 1.55 2.09 1.26 3.59 4.85 0.16 0.44 0.60 2008 0.02 0.05 0.07 0.12 0.33 0.45 0.12 0.34 0.45 0.36 1.03 1.39 0.54 1.53 2.07 2.49 7.08 9.57 0.91 2.58 3.49 2.10 5.98 8.07 0.26 0.74 1.00 2009 0.03 0.07 0.10 0.17 0.48 0.64 0.17 0.48 0.65 0.52 1.47 1.99 0.77 2.19 2.96 3.57 10.15 13.71 1.30 3.70 5.00 3.01 8.56 11.57 0.37 1.06 1.43 2010 0.03 0.10 0.13 0.22 0.63 0.85 0.22 0.63 0.86 0.68 1.94 2.62 1.02 2.89 3.91 4.70 13.38 18.08 1.71 4.88 6.59 3.97 11.29 15.25 0.49 1.40 1.89 2011 0.04 0.12 0.16 0.28 0.78 1.06 0.28 0.79 1.07 0.85 2.42 3.27 1.27 3.61 4.88 5.88 16.73 22.61 2.14 6.10 8.24 4.96 14.12 19.08 0.61 1.75 2.36 2012 0.05 0.15 0.20 0.33 0.94 1.28 0.34 0.96 1.29 1.03 2.92 3.95 1.53 4.36 5.89 6.46 18.39 24.85 2.36 6.71 9.06 5.45 15.52 20.97 0.67 1.92 2.59 2013 0.06 0.17 0.23 0.39 1.11 1.50 0.39 1.12 1.52 1.21 3.43 4.64 1.80 5.12 6.92 6.83 19.45 26.28 2.49 7.09 9.58 5.77 16.41 22.18 0.71 2.03 2.74 2014 0.07 0.20 0.27 0.45 1.28 1.73 0.45 1.29 1.75 1.39 3.95 5.34 2.07 5.89 7.97 7.10 20.20 27.30 2.59 7.36 9.95 5.99 17.04 23.03 0.74 2.11 2.85 2015 0.07 0.21 0.29 0.48 1.36 1.84 0.48 1.38 1.86 1.48 4.22 5.70 2.21 6.29 8.51 7.30 20.77 28.06 2.66 7.57 10.23 6.16 17.52 23.68 0.76 2.17 2.93 2016 0.08 0.22 0.30 0.50 1.42 1.92 0.50 1.44 1.94 1.54 4.39 5.94 2.30 6.56 8.86 7.45 21.22 28.67 2.72 7.74 10.45 6.29 17.90 24.19 0.78 2.21 2.99 2017 0.08 0.23 0.31 0.51 1.46 1.98 0.52 1.48 2.00 1.59 4.52 6.11 2.37 6.75 9.12 7.58 21.58 29.17 2.76 7.87 10.63 6.40 18.21 24.61 0.79 2.25 3.04 2018 0.08 0.23 0.31 0.53 1.49 2.02 0.53 1.51 2.04 1.62 4.62 6.24 2.42 6.90 9.32 7.69 21.89 29.58 2.80 7.98 10.78 6.49 18.47 24.96 0.80 2.28 3.09 2019 0.08 0.24 0.32 0.53 1.52 2.05 0.54 1.54 2.08 1.65 4.70 6.35 2.46 7.01 9.48 7.78 22.15 29.93 2.84 8.07 10.91 6.57 18.69 25.25 0.81 2.31 3.12 2020 0.08 0.24 0.32 0.54 1.54 2.08 0.55 1.56 2.11 1.67 4.77 6.44 2.50 7.11 9.61 7.86 22.37 30.23 2.87 8.16 11.02 6.63 18.87 25.51 0.82 2.33 3.15 2021 0.08 0.24 0.33 0.55 1.56 2.11 0.55 1.58 2.13 1.69 4.82 6.52 2.53 7.20 9.72 7.93 22.56 30.49 2.89 8.23 11.12 6.69 19.04 25.73 0.83 2.35 3.18 2022 0.09 0.24 0.33 0.55 1.58 2.13 0.56 1.59 2.15 1.71 4.87 6.58 2.55 7.27 9.82 7.99 22.73 30.72 2.91 8.29 11.20 6.74 19.18 25.92 0.83 2.37 3.20 2023 0.09 0.25 0.33 0.56 1.59 2.15 0.56 1.61 2.17 1.73 4.91 6.64 2.57 7.33 9.90 8.04 22.89 30.93 2.93 8.34 11.28 6.78 19.31 26.10 0.84 2.39 3.23 2024 0.09 0.25 0.34 0.56 1.60 2.16 0.57 1.62 2.19 1.74 4.95 6.69 2.59 7.38 9.98 8.09 23.02 31.11 2.95 8.39 11.34 6.83 19.43 26.25 0.84 2.40 3.24 2025 0.09 0.25 0.34 0.57 1.61 2.18 0.57 1.63 2.20 1.75 4.98 6.73 2.61 7.43 10.04 8.13 23.14 31.28 2.96 8.44 11.40 6.86 19.53 26.39 0.85 2.41 3.26 2026 0.09 0.25 0.34 0.57 1.62 2.19 0.58 1.64 2.21 1.76 5.01 6.77 2.63 7.47 10.10 8.17 23.25 31.43 2.98 8.48 11.46 6.89 19.62 26.52 0.85 2.43 3.28 2027 0.09 0.25 0.34 0.57 1.63 2.20 0.58 1.65 2.22 1.77 5.03 6.80 2.64 7.51 10.15 8.21 23.36 31.56 2.99 8.52 11.51 6.92 19.71 26.63 0.86 2.44 3.29 Total 1.41 4.00 5.41 9.07 25.82 34.89 9.17 26.10 35.27 28.05 79.82 107.87 41.85 119.12 160.97 141.36 402.34 543.70 51.54 146.70 198.24 119.28 339.49 458.77 14.75 41.97 56.71 Avg. 0.06 0.16 0.22 0.36 1.03 1.40 0.37 1.04 1.41 1.12 3.19 4.31 1.67 4.76 6.44 5.65 16.09 21.75 2.06 5.87 7.93 4.77 13.58 18.35 0.59 1.68 2.27 Avg.  All Size Categories Note:

Source: TTHM  Alternative 2 64.07 Exhibit E. 20f Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 Ground Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2 ]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 20a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005

2006 0.01 0.02 0.03 0.06 0.16 0.22 0.08 0.22 0.30 0.36 1.04 1.40 0.89 2.52 3.41 5.29 15.07 20.36 3.35 9.52 12.87 12.80 36.44 49.24 10.75 30.58 41.33 2007 0.02 0.06 0.08 0.13 0.38 0.52 0.18 0.52 0.71 0.87 2.46 3.33 2.11 6.00 8.11 12.60 35.86 48.46 7.96 22.67 30.63 30.47 86.73 117.21 25.58 72.79 98.37 2008 0.03 0.09 0.13 0.22 0.64 0.86 0.31 0.87 1.18 1.44 4.11 5.55 3.51 10.00 13.51 21.00 59.76 80.76 13.27 37.78 51.05 50.78 144.54 195.32 42.62 121.31 163.93 2009 0.05 0.13 0.18 0.32 0.92 1.24 0.44 1.25 1.69 2.07 5.88 7.95 5.03 14.33 19.36 30.09 85.64 115.73 19.02 54.14 73.16 72.77 207.13 279.90 61.08 173.84 234.92 2010 0.06 0.18 0.24 0.42 1.21 1.63 0.58 1.65 2.22 2.73 7.76 10.48 6.64 18.89 25.53 39.67 112.90 152.57 25.08 71.37 96.44 95.94 273.06 369.00 80.52 229.17 309.70 2011 0.08 0.22 0.30 0.53 1.51 2.04 0.72 2.06 2.78 3.41 9.70 13.11 8.30 23.62 31.92 49.61 141.19 190.80 31.36 89.25 120.61 119.98 341.47 461.45 100.69 286.59 387.29 2012 0.09 0.27 0.36 0.64 1.82 2.46 0.87 2.48 3.35 4.11 11.70 15.81 10.01 28.49 38.50 54.53 155.21 209.74 34.47 98.11 132.58 131.89 375.37 507.26 110.69 315.04 425.73 2013 0.11 0.31 0.42 0.75 2.14 2.89 1.02 2.91 3.94 4.83 13.74 18.57 11.76 33.46 45.22 57.67 164.13 221.80 36.45 103.75 140.20 139.47 396.96 536.43 117.06 333.16 450.21 2014 0.13 0.36 0.49 0.87 2.47 3.33 1.18 3.36 4.53 5.56 15.82 21.38 13.54 38.52 52.06 59.90 170.47 230.37 37.86 107.76 145.62 144.86 412.29 557.15 121.58 346.03 467.61 2015 0.14 0.39 0.52 0.92 2.63 3.56 1.26 3.58 4.84 5.93 16.89 22.83 14.45 41.14 55.59 61.58 175.27 236.86 38.93 110.79 149.72 148.94 423.90 572.84 125.00 355.77 480.78 2016 0.14 0.40 0.54 0.96 2.74 3.71 1.31 3.73 5.04 6.18 17.60 23.78 15.06 42.85 57.91 62.91 179.07 241.98 39.77 113.19 152.96 152.16 433.07 585.23 127.71 363.47 491.18 2017 0.15 0.41 0.56 0.99 2.82 3.81 1.35 3.84 5.19 6.36 18.11 24.47 15.50 44.10 59.60 64.00 182.15 246.15 40.45 115.14 155.60 154.78 440.54 595.32 129.91 369.74 499.64 2018 0.15 0.42 0.57 1.01 2.88 3.90 1.38 3.93 5.30 6.50 18.51 25.01 15.83 45.07 60.90 64.90 184.72 249.63 41.03 116.77 157.79 156.97 446.76 603.73 131.74 374.96 506.70 2019 0.15 0.43 0.58 1.03 2.93 3.96 1.40 3.99 5.40 6.61 18.83 25.44 16.11 45.84 61.95 65.67 186.91 252.58 41.51 118.15 159.66 158.82 452.04 610.86 133.30 379.39 512.68 2020 0.15 0.44 0.59 1.05 2.97 4.02 1.42 4.05 5.47 6.71 19.09 25.80 16.33 46.49 62.82 66.33 188.78 255.11 41.93 119.33 161.26 160.42 456.58 617.00 134.64 383.20 517.84 2021 0.15 0.44 0.60 1.06 3.01 4.07 1.44 4.10 5.53 6.78 19.31 26.10 16.52 47.03 63.55 66.90 190.42 257.33 42.29 120.37 162.66 161.81 460.54 622.35 135.81 386.52 522.33 2022 0.16 0.45 0.60 1.07 3.04 4.11 1.45 4.14 5.59 6.85 19.50 26.35 16.69 47.49 64.18 67.41 191.86 259.28 42.61 121.28 163.89 163.04 464.03 627.06 136.83 389.45 526.28 2023 0.16 0.45 0.61 1.08 3.06 4.14 1.47 4.17 5.64 6.91 19.67 26.58 16.83 47.90 64.72 67.86 193.14 261.01 42.90 122.09 164.99 164.12 467.12 631.25 137.75 392.05 529.80 2024 0.16 0.45 0.61 1.08 3.09 4.17 1.48 4.20 5.68 6.96 19.81 26.77 16.95 48.25 65.20 68.26 194.29 262.56 43.15 122.81 165.97 165.10 469.90 635.00 138.56 394.38 532.94 2025 0.16 0.46 0.62 1.09 3.11 4.20 1.49 4.23 5.72 7.01 19.94 26.95 17.06 48.57 65.63 68.63 195.32 263.95 43.38 123.47 166.85 165.98 472.40 638.37 139.30 396.47 535.78 2026 0.16 0.46 0.62 1.10 3.13 4.22 1.49 4.25 5.75 7.05 20.06 27.11 17.16 48.85 66.01 68.96 196.26 265.22 43.59 124.06 167.65 166.77 474.66 641.44 139.97 398.38 538.35 2027 0.16 0.46 0.62 1.10 3.14 4.25 1.50 4.28 5.78 7.08 20.16 27.25 17.25 49.10 66.35 69.26 197.12 266.37 43.78 124.60 168.38 167.50 476.73 644.23 140.58 400.11 540.69 Total 2.57 7.30 9.87 17.50 49.82 67.32 23.82 67.80 91.63 112.32 319.68 432.00 273.53 778.51 1,052.04 1,193.04 3,395.57 4,588.61 754.14 2,146.39 2,900.52 2,885.39 8,212.26 11,097.65 2,421.66 6,892.40 9,314.06 Avg. 0.10 0.29 0.39 0.70 1.99 2.69 0.95 2.71 3.67 4.49 12.79 17.28 10.94 31.14 42.08 47.72 135.82 183.54 30.17 85.86 116.02 115.42 328.49 443.91 96.87 275.70 372.56 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 20a. 50,001 100,000 100,001 1 Million > 1 Million 1,182.15 Exhibit E. 20g Yearly Cancer Cases Avoided by System Size All Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  Alternative 2 Economic Analysis for the Stage 2 DBPR July 2003 Section E. 6.5 Projection of Cases  Stage 2 Alternative 3 TTHM as Indicator Economic Analysis for the Stage 2 DBPR July 2003 Annual Existing Cancer Cases  Pre Stage 2 DBPR Annual Existing Cancer Cases  Post Stage 2 Annual Reductions in Bladder Cancer Cases Attributable to the Stage 2 DBPR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.11 0.84 0.95 < 100 0.11 0.82 0.93 < 100 0.01 0.02 0.02 101 500 0.82 5.41 6.23 101 500 0.78 5.29 6.08 101 500 0.04 0.12 0.16 501 1,000 1.43 5.47 6.90 501 1,000 1.36 5.35 6.71 501 1,000 0.07 0.12 0.19 1,001 3,300 8.20 16.74 24.94 1,001 3,300 7.81 16.37 24.18 1,001 3,300 0.39 0.37 0.76 3,301 10,000 22.53 24.98 47.51 3,301 10,000 21.47 24.43 45.90 3,301 10,000 1.07 0.55 1.62 10,001 50,000 93.44 51.52 144.96 10,001 50,000 89.03 50.65 139.67 10,001 50,000 4.42 0.87 5.29 50,001 100,000 62.43 18.78 81.21 50,001 100,000 59.48 18.47 77.94 50,001 100,000 2.95 0.32 3.27 100,001 1 Million 245.77 43.47 289.24 100,001 1 Million 234.16 42.74 276.89 100,001 1 Million 11.62 0.73 12.35 > 1 Million 213.86 5.37 219.23 > 1 Million 203.75 5.28 209.03 > 1 Million 10.11 0.09 10.20 Total 648.59 172.59 821.17 Total 617.93 169.39 787.33 Total 30.65 3.19 33.84 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.98 7.32 8.31 < 100 0.94 7.16 8.10 < 100 0.38 0.23 0.62 101 500 7.16 47.25 54.41 101 500 6.82 46.21 53.03 101 500 2.80 1.50 4.29 501 1,000 12.44 47.76 60.20 501 1,000 11.85 46.71 58.56 501 1,000 4.86 1.51 6.37 1,001 3,300 71.53 146.09 217.62 1,001 3,300 68.15 142.86 211.02 1,001 3,300 27.94 4.63 32.57 3,301 10,000 196.66 218.00 414.66 3,301 10,000 187.36 213.18 400.55 3,301 10,000 76.81 6.91 83.72 10,001 50,000 815.50 449.59 1,265.09 10,001 50,000 776.96 442.01 1,218.96 10,001 50,000 318.51 22.31 340.82 50,001 100,000 544.81 163.93 708.74 50,001 100,000 519.06 161.16 680.22 50,001 100,000 212.79 8.13 220.92 100,001 1 Million 2,144.92 379.36 2,524.28 100,001 1 Million 2,043.54 372.96 2,416.50 100,001 1 Million 837.75 18.82 856.57 > 1 Million 1,866.38 46.90 1,913.28 > 1 Million 1,778.17 46.10 1,824.28 > 1 Million 728.96 2.33 731.29 Total 5,660.38 1,506.20 7,166.58 Total 5,392.85 1,478.35 6,871.21 Total 2,210.79 66.38 2,277.17 Source: Derived from figures presented in Appendix E. Annual Existing Cases  Post Stage 2 System Size ( Population Served) Annual Existing Cases  Post Stage 2 System Size ( Population Served)

System Size ( Population Served) Annual Cases Reduced by Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 Exhibit E. 21a Expanded Cancer Case Inputs for Benefits Quantification ( TTHM  Alternative 3)

System Size ( Population Served) Annual Cases Reduced by Stage 2 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.03 0.04 0.11 0.15 0.11 0.30 0.40 0.65 1.86 2.52 0.44 1.24 1.68 1.72 4.90 6.62 1.50 4.26 5.76 2007 0.00 0.00 0.00 0.01 0.03 0.04 0.02 0.05 0.06 0.09 0.26 0.35 0.25 0.71 0.96 1.56 4.43 5.99 1.04 2.96 4.00 4.09 11.65 15.75 3.56 10.14 13.70 2008 0.00 0.01 0.01 0.02 0.04 0.06 0.03 0.08 0.10 0.15 0.43 0.58 0.42 1.19 1.60 2.59 7.38 9.98 1.73 4.93 6.67 6.82 19.42 26.25 5.94 16.90 22.84 2009 0.00 0.01 0.01 0.02 0.06 0.08 0.04 0.11 0.15 0.22 0.62 0.84 0.60 1.70 2.30 3.72 10.58 14.30 2.48 7.07 9.55 9.78 27.83 37.61 8.51 24.22 32.73 2010 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.14 0.19 0.29 0.82 1.10 0.79 2.24 3.03 4.90 13.95 18.85 3.27 9.32 12.59 12.89 36.69 49.58 11.22 31.93 43.15 2011 0.00 0.01 0.02 0.04 0.10 0.14 0.06 0.18 0.24 0.36 1.02 1.38 0.99 2.80 3.79 6.13 17.45 23.58 4.09 11.65 15.75 16.12 45.89 62.01 14.03 39.93 53.96 2012 0.01 0.02 0.02 0.04 0.12 0.17 0.08 0.21 0.29 0.43 1.23 1.66 1.19 3.38 4.57 6.74 19.18 25.92 4.50 12.81 17.31 17.72 50.44 68.16 15.42 43.89 59.31 2013 0.01 0.02 0.03 0.05 0.14 0.20 0.09 0.25 0.34 0.51 1.45 1.95 1.40 3.97 5.37 7.13 20.28 27.41 4.76 13.55 18.31 18.74 53.34 72.08 16.31 46.41 62.72 2014 0.01 0.02 0.03 0.06 0.17 0.22 0.10 0.29 0.39 0.58 1.66 2.25 1.61 4.57 6.18 7.40 21.06 28.46 4.94 14.07 19.02 19.47 55.40 74.87 16.94 48.21 65.14 2015 0.01 0.02 0.03 0.06 0.18 0.24 0.11 0.31 0.42 0.62 1.78 2.40 1.72 4.88 6.60 7.61 21.66 29.27 5.08 14.47 19.55 20.01 56.96 76.98 17.41 49.56 66.98 2016 0.01 0.03 0.03 0.07 0.19 0.25 0.11 0.32 0.43 0.65 1.85 2.50 1.79 5.09 6.87 7.77 22.13 29.90 5.19 14.78 19.97 20.45 58.19 78.64 17.79 50.64 68.43 2017 0.01 0.03 0.04 0.07 0.19 0.26 0.12 0.33 0.45 0.67 1.90 2.57 1.84 5.24 7.08 7.91 22.51 30.41 5.28 15.04 20.32 20.80 59.20 80.00 18.10 51.51 69.61 2018 0.01 0.03 0.04 0.07 0.19 0.26 0.12 0.34 0.46 0.68 1.95 2.63 1.88 5.35 7.23 8.02 22.82 30.84 5.36 15.25 20.61 21.09 60.03 81.13 18.35 52.24 70.59 2019 0.01 0.03 0.04 0.07 0.20 0.27 0.12 0.34 0.47 0.70 1.98 2.68 1.91 5.44 7.36 8.11 23.09 31.21 5.42 15.43 20.85 21.34 60.74 82.08 18.57 52.85 71.42 2020 0.01 0.03 0.04 0.07 0.20 0.27 0.12 0.35 0.47 0.71 2.01 2.71 1.94 5.52 7.46 8.20 23.33 31.52 5.48 15.58 21.06 21.56 61.35 82.91 18.76 53.39 72.14 2021 0.01 0.03 0.04 0.07 0.20 0.27 0.12 0.35 0.48 0.71 2.03 2.74 1.96 5.58 7.54 8.27 23.53 31.80 5.52 15.72 21.24 21.74 61.88 83.63 18.92 53.85 72.77 2022 0.01 0.03 0.04 0.07 0.21 0.28 0.13 0.36 0.48 0.72 2.05 2.77 1.98 5.64 7.62 8.33 23.71 32.04 5.56 15.84 21.40 21.91 62.35 84.26 19.06 54.26 73.32 2023 0.01 0.03 0.04 0.07 0.21 0.28 0.13 0.36 0.49 0.73 2.07 2.80 2.00 5.69 7.68 8.38 23.86 32.25 5.60 15.94 21.55 22.05 62.77 84.82 19.19 54.62 73.81 2024 0.01 0.03 0.04 0.07 0.21 0.28 0.13 0.36 0.49 0.73 2.08 2.82 2.01 5.73 7.74 8.43 24.01 32.44 5.64 16.04 21.67 22.19 63.14 85.33 19.30 54.94 74.25 2025 0.01 0.03 0.04 0.07 0.21 0.28 0.13 0.36 0.49 0.74 2.10 2.83 2.03 5.77 7.79 8.48 24.13 32.61 5.66 16.12 21.79 22.30 63.48 85.78 19.41 55.23 74.64 2026 0.01 0.03 0.04 0.07 0.21 0.29 0.13 0.37 0.50 0.74 2.11 2.85 2.04 5.80 7.84 8.52 24.25 32.77 5.69 16.20 21.89 22.41 63.78 86.19 19.50 55.50 75.00 2027 0.01 0.03 0.04 0.07 0.21 0.29 0.13 0.37 0.50 0.75 2.12 2.87 2.05 5.83 7.88 8.56 24.36 32.91 5.72 16.27 21.99 22.51 64.06 86.57 19.58 55.74 75.33 Total 0.16 0.46 0.62 1.18 3.36 4.55 2.05 5.85 7.90 11.81 33.62 45.43 32.47 92.43 124.90 147.41 419.56 566.97 98.48 280.29 378.78 387.72 1,103.52 1,491.24 337.37 960.22 1,297.59 Avg. 0.01 0.02 0.02 0.05 0.13 0.18 0.08 0.23 0.32 0.47 1.34 1.82 1.30 3.70 5.00 5.90 16.78 22.68 3.94 11.21 15.15 15.51 44.14 59.65 13.49 38.41 51.90 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 21a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 TTHM  Alternative 3 156.72 Exhibit E. 21b Yearly Cancer Cases Avoided by System Size 50,001 100,000 100,001 1 Million > 1 Million 101 500 Surface Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.01 0.01 0.02 0.02 0.01 0.03 0.04 0.05 0.13 0.18 0.02 0.05 0.06 0.04 0.11 0.15 0.00 0.01 0.02 2007 0.00 0.00 0.00 0.00 0.01 0.02 0.00 0.01 0.02 0.02 0.04 0.06 0.02 0.06 0.09 0.11 0.31 0.42 0.04 0.11 0.15 0.09 0.26 0.35 0.01 0.03 0.04 2008 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.02 0.03 0.03 0.07 0.10 0.04 0.11 0.14 0.18 0.52 0.70 0.07 0.19 0.25 0.15 0.44 0.59 0.02 0.05 0.07 2009 0.00 0.01 0.01 0.01 0.03 0.04 0.01 0.03 0.05 0.04 0.10 0.14 0.05 0.15 0.21 0.26 0.74 1.00 0.09 0.27 0.37 0.22 0.63 0.85 0.03 0.08 0.10 2010 0.00 0.01 0.01 0.02 0.04 0.06 0.02 0.04 0.06 0.05 0.14 0.18 0.07 0.20 0.27 0.34 0.98 1.32 0.13 0.36 0.48 0.29 0.82 1.11 0.04 0.10 0.14 2011 0.00 0.01 0.01 0.02 0.05 0.07 0.02 0.06 0.07 0.06 0.17 0.23 0.09 0.25 0.34 0.43 1.22 1.65 0.16 0.45 0.60 0.36 1.03 1.39 0.04 0.13 0.17 2012 0.00 0.01 0.01 0.02 0.07 0.09 0.02 0.07 0.09 0.07 0.20 0.28 0.11 0.30 0.41 0.47 1.34 1.82 0.17 0.49 0.66 0.40 1.13 1.53 0.05 0.14 0.19 2013 0.00 0.01 0.02 0.03 0.08 0.10 0.03 0.08 0.11 0.08 0.24 0.32 0.13 0.36 0.48 0.50 1.42 1.92 0.18 0.52 0.70 0.42 1.20 1.62 0.05 0.15 0.20 2014 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.28 0.37 0.14 0.41 0.56 0.52 1.48 1.99 0.19 0.54 0.73 0.44 1.24 1.68 0.05 0.15 0.21 2015 0.01 0.01 0.02 0.03 0.10 0.13 0.03 0.10 0.13 0.10 0.29 0.40 0.15 0.44 0.59 0.53 1.52 2.05 0.19 0.55 0.75 0.45 1.28 1.73 0.06 0.16 0.21 2016 0.01 0.02 0.02 0.03 0.10 0.13 0.04 0.10 0.14 0.11 0.31 0.41 0.16 0.46 0.62 0.54 1.55 2.09 0.20 0.57 0.76 0.46 1.31 1.77 0.06 0.16 0.22 2017 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.10 0.14 0.11 0.32 0.43 0.17 0.47 0.64 0.55 1.58 2.13 0.20 0.57 0.78 0.47 1.33 1.80 0.06 0.16 0.22 2018 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.11 0.14 0.11 0.32 0.44 0.17 0.48 0.65 0.56 1.60 2.16 0.20 0.58 0.79 0.47 1.35 1.82 0.06 0.17 0.23 2019 0.01 0.02 0.02 0.04 0.11 0.14 0.04 0.11 0.14 0.12 0.33 0.44 0.17 0.49 0.66 0.57 1.62 2.19 0.21 0.59 0.80 0.48 1.36 1.84 0.06 0.17 0.23 2020 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.33 0.45 0.17 0.50 0.67 0.57 1.63 2.21 0.21 0.60 0.80 0.48 1.38 1.86 0.06 0.17 0.23 2021 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.34 0.45 0.18 0.50 0.68 0.58 1.65 2.23 0.21 0.60 0.81 0.49 1.39 1.88 0.06 0.17 0.23 2022 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.34 0.46 0.18 0.51 0.69 0.58 1.66 2.24 0.21 0.61 0.82 0.49 1.40 1.89 0.06 0.17 0.23 2023 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.34 0.46 0.18 0.51 0.69 0.59 1.67 2.26 0.21 0.61 0.82 0.50 1.41 1.91 0.06 0.17 0.24 2024 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.35 0.47 0.18 0.52 0.70 0.59 1.68 2.27 0.22 0.61 0.83 0.50 1.42 1.92 0.06 0.18 0.24 2025 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.35 0.47 0.18 0.52 0.70 0.59 1.69 2.28 0.22 0.62 0.83 0.50 1.43 1.93 0.06 0.18 0.24 2026 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.35 0.47 0.18 0.52 0.71 0.60 1.70 2.30 0.22 0.62 0.84 0.50 1.43 1.94 0.06 0.18 0.24 2027 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.16 0.12 0.35 0.47 0.18 0.52 0.71 0.60 1.71 2.31 0.22 0.62 0.84 0.51 1.44 1.95 0.06 0.18 0.24 Total 0.10 0.28 0.38 0.63 1.80 2.44 0.64 1.82 2.46 1.96 5.57 7.53 2.92 8.32 #### #### #### #### 3.76 #### #### 8.71 #### #### 1.08 3.07 4.14 Avg. 0.00 0.01 0.02 0.03 0.07 0.10 0.03 0.07 0.10 0.08 0.22 0.30 0.12 0.33 0.45 0.41 1.18 1.59 0.15 0.43 0.58 0.35 0.99 1.34 0.04 0.12 0.17 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 21a. 50,001 100,000 100,001 1 Million > 1 Million 4.64 Exhibit E. 21c Yearly Cancer Cases Avoided by System Size Ground Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  Alternative 3 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.01 0.02 0.02 0.01 0.02 0.03 0.04 0.13 0.17 0.11 0.33 0.44 0.70 1.99 2.69 0.45 1.29 1.74 1.76 5.01 6.77 1.50 4.27 5.78 2007 0.00 0.01 0.01 0.01 0.04 0.05 0.02 0.06 0.08 0.11 0.30 0.41 0.27 0.78 1.05 1.67 4.74 6.41 1.08 3.07 4.15 4.19 11.92 16.10 3.57 10.17 13.75 2008 0.00 0.01 0.01 0.02 0.07 0.09 0.03 0.10 0.13 0.18 0.50 0.68 0.45 1.29 1.75 2.78 7.90 10.68 1.80 5.12 6.92 6.98 19.86 26.84 5.96 16.95 22.91 2009 0.00 0.01 0.02 0.03 0.10 0.13 0.05 0.14 0.19 0.25 0.72 0.97 0.65 1.85 2.51 3.98 11.32 15.30 2.58 7.34 9.92 10.00 28.46 38.46 8.54 24.30 32.83 2010 0.01 0.02 0.02 0.04 0.13 0.17 0.07 0.19 0.25 0.33 0.95 1.29 0.86 2.44 3.30 5.24 14.93 20.17 3.40 9.68 13.08 13.18 37.52 50.70 11.25 32.03 43.28 2011 0.01 0.02 0.03 0.06 0.16 0.21 0.08 0.23 0.31 0.42 1.19 1.61 1.07 3.06 4.13 6.56 18.67 25.23 4.25 12.10 16.35 16.48 46.92 63.40 14.07 40.05 54.13 2012 0.01 0.03 0.04 0.07 0.19 0.26 0.10 0.28 0.38 0.50 1.43 1.94 1.30 3.69 4.98 7.21 20.52 27.73 4.67 13.30 17.98 18.12 51.57 69.69 15.47 44.03 59.50 2013 0.01 0.03 0.04 0.08 0.22 0.30 0.12 0.33 0.45 0.59 1.68 2.28 1.52 4.33 5.85 7.62 21.70 29.33 4.94 14.07 19.01 19.16 54.54 73.70 16.36 46.56 62.92 2014 0.01 0.04 0.05 0.09 0.26 0.35 0.13 0.38 0.51 0.68 1.94 2.62 1.75 4.99 6.74 7.92 22.54 30.46 5.13 14.61 19.74 19.90 56.65 76.55 16.99 48.36 65.35 2015 0.01 0.04 0.05 0.10 0.27 0.37 0.14 0.41 0.55 0.73 2.07 2.80 1.87 5.32 7.19 8.14 23.17 31.32 5.28 15.02 20.30 20.46 58.24 78.70 17.47 49.72 67.19 2016 0.01 0.04 0.06 0.10 0.28 0.38 0.15 0.42 0.57 0.76 2.16 2.92 1.95 5.55 7.49 8.32 23.68 31.99 5.39 15.35 20.74 20.91 59.50 80.41 17.85 50.80 68.65 2017 0.01 0.04 0.06 0.10 0.29 0.40 0.15 0.43 0.59 0.78 2.22 3.00 2.01 5.71 7.71 8.46 24.08 32.54 5.48 15.61 21.10 21.27 60.53 81.79 18.16 51.67 69.83 2018 0.02 0.04 0.06 0.11 0.30 0.40 0.16 0.44 0.60 0.80 2.27 3.07 2.05 5.83 7.88 8.58 24.42 33.00 5.56 15.83 21.39 21.57 61.38 82.95 18.41 52.40 70.82 2019 0.02 0.04 0.06 0.11 0.30 0.41 0.16 0.45 0.61 0.81 2.31 3.12 2.08 5.93 8.02 8.68 24.71 33.39 5.63 16.02 21.65 21.82 62.11 83.93 18.63 53.02 71.65 2020 0.02 0.04 0.06 0.11 0.31 0.42 0.16 0.46 0.62 0.82 2.34 3.16 2.11 6.02 8.13 8.77 24.96 33.73 5.68 16.18 21.86 22.04 62.73 84.77 18.82 53.56 72.37 2021 0.02 0.04 0.06 0.11 0.31 0.42 0.16 0.46 0.63 0.83 2.37 3.20 2.14 6.09 8.22 8.85 25.18 34.02 5.73 16.32 22.05 22.23 63.28 85.51 18.98 54.02 73.00 2022 0.02 0.05 0.06 0.11 0.32 0.43 0.16 0.47 0.63 0.84 2.39 3.23 2.16 6.15 8.30 8.91 25.37 34.28 5.78 16.44 22.22 22.40 63.75 86.15 19.12 54.43 73.55 2023 0.02 0.05 0.06 0.11 0.32 0.43 0.17 0.47 0.64 0.85 2.41 3.26 2.18 6.20 8.38 8.97 25.54 34.51 5.82 16.55 22.37 22.55 64.18 86.73 19.25 54.79 74.04 2024 0.02 0.05 0.06 0.11 0.32 0.43 0.17 0.48 0.64 0.85 2.43 3.28 2.19 6.24 8.44 9.03 25.69 34.71 5.85 16.65 22.50 22.68 64.56 87.24 19.37 55.12 74.48 2025 0.02 0.05 0.06 0.11 0.32 0.44 0.17 0.48 0.65 0.86 2.44 3.30 2.21 6.28 8.49 9.07 25.82 34.90 5.88 16.74 22.62 22.80 64.90 87.71 19.47 55.41 74.88 2026 0.02 0.05 0.06 0.11 0.32 0.44 0.17 0.48 0.65 0.86 2.46 3.32 2.22 6.32 8.54 9.12 25.95 35.07 5.91 16.82 22.73 22.91 65.22 88.13 19.56 55.68 75.24 2027 0.02 0.05 0.06 0.11 0.33 0.44 0.17 0.48 0.65 0.87 2.47 3.34 2.23 6.35 8.59 9.16 26.06 35.22 5.94 16.89 22.83 23.01 65.50 88.51 19.65 55.92 75.57 Total 0.26 0.74 1.00 1.82 5.17 6.98 2.69 7.67 10.36 13.77 39.19 52.96 35.40 100.74 136.14 157.74 448.94 606.68 102.25 291.01 393.25 396.43 1,128.31 1,524.75 338.45 963.28 1,301.73 Avg. 0.01 0.03 0.04 0.07 0.21 0.28 0.11 0.31 0.41 0.55 1.57 2.12 1.42 4.03 5.45 6.31 17.96 24.27 4.09 11.64 15.73 15.86 45.13 60.99 13.54 38.53 52.07 Avg.  All Size Categories Note:

Source: TTHM  Alternative 3 161.35 Exhibit E. 21d Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 All Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 21a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005

2006 0.00 0.01 0.02 0.03 0.10 0.13 0.06 0.17 0.22 0.33 0.95 1.28 0.92 2.61 3.53 5.71 16.25 21.96 3.81 10.85 14.67 15.01 42.73 57.75 13.06 37.18 50.25 2007 0.01 0.03 0.04 0.08 0.23 0.31 0.14 0.39 0.53 0.79 2.26 3.06 2.18 6.22 8.40 13.59 38.67 52.26 9.08 25.84 34.91 35.74 101.71 137.45 31.10 88.50 119.60 2008 0.02 0.05 0.07 0.13 0.38 0.51 0.23 0.66 0.89 1.32 3.77 5.09 3.64 10.36 14.00 22.64 64.45 87.09 15.13 43.05 58.18 59.56 169.50 229.06 51.82 147.49 199.31 2009 0.03 0.07 0.10 0.19 0.54 0.73 0.33 0.94 1.27 1.90 5.40 7.30 5.22 14.85 20.06 32.45 92.35 124.80 21.68 61.70 83.38 85.34 242.90 328.25 74.26 211.36 285.62 2010 0.03 0.10 0.13 0.25 0.71 0.96 0.43 1.24 1.67 2.50 7.12 9.62 6.88 19.57 26.45 42.78 121.75 164.53 28.58 81.34 109.92 112.51 320.22 432.73 97.90 278.64 376.54 2011 0.04 0.12 0.17 0.31 0.89 1.20 0.54 1.55 2.09 3.13 8.90 12.03 8.60 24.48 33.08 53.49 152.25 205.75 35.74 101.72 137.45 140.70 400.45 541.15 122.43 348.45 470.88 2012 0.05 0.15 0.20 0.38 1.07 1.45 0.66 1.87 2.52 3.77 10.74 14.51 10.37 29.52 39.89 58.80 167.37 226.17 39.29 111.81 151.10 154.67 440.21 594.87 134.58 383.04 517.63 2013 0.06 0.17 0.23 0.44 1.26 1.71 0.77 2.19 2.96 4.43 12.61 17.04 12.18 34.67 46.85 62.19 176.99 239.18 41.54 118.24 159.79 163.56 465.52 629.08 142.32 405.07 547.39 2014 0.07 0.20 0.27 0.51 1.45 1.96 0.89 2.52 3.41 5.10 14.52 19.62 14.02 39.91 53.94 64.59 183.83 248.42 43.15 122.81 165.96 169.88 483.50 653.38 147.82 420.72 568.54 2015 0.07 0.21 0.29 0.55 1.55 2.10 0.95 2.70 3.64 5.45 15.50 20.95 14.98 42.62 57.60 66.41 189.01 255.41 44.36 126.27 170.63 174.66 497.12 671.78 151.98 432.57 584.55 2016 0.08 0.22 0.30 0.57 1.62 2.18 0.99 2.81 3.80 5.67 16.15 21.82 15.60 44.40 60.00 67.84 193.09 260.94 45.32 129.00 174.33 178.44 507.87 686.32 155.27 441.92 597.19 2017 0.08 0.23 0.31 0.58 1.66 2.25 1.02 2.89 3.91 5.84 16.62 22.46 16.06 45.70 61.75 69.01 196.42 265.44 46.11 131.22 177.33 181.52 516.63 698.15 157.95 449.54 607.49 2018 0.08 0.23 0.32 0.60 1.70 2.30 1.04 2.95 3.99 5.97 16.99 22.95 16.41 46.70 63.10 69.99 199.20 269.18 46.76 133.08 179.83 184.08 523.92 708.01 160.18 455.89 616.07 2019 0.08 0.24 0.32 0.61 1.73 2.34 1.06 3.00 4.06 6.07 17.28 23.35 16.69 47.50 64.19 70.81 201.55 272.36 47.31 134.65 181.96 186.26 530.11 716.37 162.07 461.27 623.34 2020 0.08 0.24 0.33 0.62 1.75 2.37 1.07 3.05 4.12 6.16 17.52 23.68 16.92 48.17 65.09 71.53 203.57 275.10 47.78 136.00 183.79 188.13 535.44 723.57 163.70 465.91 629.61 2021 0.09 0.24 0.33 0.62 1.77 2.40 1.08 3.08 4.16 6.23 17.72 23.95 17.12 48.73 65.85 72.15 205.34 277.49 48.20 137.18 185.38 189.76 540.08 729.84 165.12 469.95 635.07 2022 0.09 0.25 0.33 0.63 1.79 2.42 1.09 3.11 4.21 6.29 17.90 24.19 17.29 49.21 66.50 72.69 206.89 279.59 48.56 138.22 186.78 191.20 544.17 735.37 166.37 473.51 639.88 2023 0.09 0.25 0.34 0.63 1.81 2.44 1.10 3.14 4.24 6.34 18.05 24.39 17.44 49.63 67.06 73.18 208.28 281.45 48.89 139.14 188.03 192.47 547.81 740.28 167.48 476.67 644.15 2024 0.09 0.25 0.34 0.64 1.82 2.46 1.11 3.16 4.27 6.39 18.18 24.57 17.57 49.99 67.56 73.61 209.51 283.13 49.18 139.97 189.15 193.62 551.06 744.67 168.47 479.50 647.97 2025 0.09 0.25 0.34 0.64 1.83 2.48 1.12 3.18 4.30 6.43 18.30 24.73 17.68 50.32 68.00 74.00 210.63 284.63 49.44 140.71 190.15 194.64 553.99 748.63 169.37 482.05 651.42 2026 0.09 0.25 0.34 0.65 1.84 2.49 1.12 3.20 4.33 6.47 18.41 24.88 17.78 50.61 68.39 74.36 211.64 286.00 49.68 141.39 191.07 195.58 556.65 752.22 170.18 484.36 654.54 2027 0.09 0.25 0.34 0.65 1.85 2.50 1.13 3.22 4.35 6.50 18.51 25.01 17.87 50.87 68.75 74.68 212.56 287.24 49.89 142.00 191.90 196.43 559.07 755.50 170.92 486.47 657.39 Total 1.42 4.03 5.45 10.32 29.36 39.68 17.93 51.02 68.95 103.09 293.41 396.50 283.41 806.63 1,090.04 1,286.51 3,661.59 4,948.10 859.48 2,446.20 3,305.68 3,383.75 9,630.69 13,014.44 2,944.35 8,380.08 11,324.43 Avg. 0.06 0.16 0.22 0.41 1.17 1.59 0.72 2.04 2.76 4.12 11.74 15.86 11.34 32.27 43.60 51.46 146.46 197.92 34.38 97.85 132.23 135.35 385.23 520.58 117.77 335.20 452.98 Avg.  All Size Categories Note:

Source: Exhibit E. 21e Yearly Cancer Cases Avoided by System Size Surface Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  Alternative 3 Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 21a. Detail may not add to totals due to independent rounding. 50,001 100,000 100,001 1 Million > 1 Million 1,367.73 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.01 0.01 0.02 0.05 0.07 0.02 0.05 0.07 0.06 0.16 0.21 0.08 0.24 0.32 0.40 1.14 1.54 0.15 0.41 0.56 0.34 0.96 1.30 0.04 0.12 0.16 2007 0.01 0.02 0.03 0.04 0.12 0.16 0.04 0.12 0.17 0.13 0.37 0.51 0.20 0.56 0.76 0.95 2.71 3.66 0.35 0.99 1.33 0.80 2.29 3.09 0.10 0.28 0.38 2008 0.01 0.03 0.04 0.07 0.20 0.27 0.07 0.20 0.28 0.22 0.62 0.84 0.33 0.93 1.26 1.59 4.51 6.10 0.58 1.65 2.22 1.34 3.81 5.15 0.17 0.47 0.64 2009 0.02 0.04 0.06 0.10 0.29 0.39 0.10 0.29 0.40 0.31 0.90 1.21 0.47 1.34 1.81 2.27 6.47 8.74 0.83 2.36 3.19 1.92 5.46 7.38 0.24 0.67 0.91 2010 0.02 0.06 0.08 0.13 0.38 0.52 0.14 0.39 0.52 0.41 1.18 1.59 0.62 1.76 2.38 3.00 8.53 11.52 1.09 3.11 4.20 2.53 7.20 9.72 0.31 0.89 1.20 2011 0.03 0.07 0.10 0.17 0.48 0.65 0.17 0.48 0.65 0.52 1.48 1.99 0.77 2.20 2.98 3.75 10.66 14.41 1.37 3.89 5.25 3.16 9.00 12.16 0.39 1.11 1.50 2012 0.03 0.09 0.12 0.20 0.58 0.78 0.20 0.58 0.79 0.63 1.78 2.41 0.93 2.66 3.59 4.12 11.72 15.84 1.50 4.27 5.78 3.48 9.89 13.37 0.43 1.22 1.65 2013 0.04 0.10 0.14 0.24 0.68 0.91 0.24 0.68 0.92 0.73 2.09 2.83 1.10 3.12 4.22 4.36 12.40 16.75 1.59 4.52 6.11 3.68 10.46 14.14 0.45 1.29 1.75 2014 0.04 0.12 0.16 0.27 0.78 1.05 0.28 0.79 1.06 0.85 2.41 3.25 1.26 3.59 4.85 4.52 12.88 17.40 1.65 4.69 6.34 3.82 10.86 14.68 0.47 1.34 1.81 2015 0.05 0.13 0.17 0.29 0.83 1.12 0.30 0.84 1.14 0.90 2.57 3.47 1.35 3.83 5.18 4.65 13.24 17.89 1.70 4.83 6.52 3.92 11.17 15.09 0.49 1.38 1.87 2016 0.05 0.13 0.18 0.30 0.87 1.17 0.31 0.88 1.18 0.94 2.68 3.62 1.40 3.99 5.40 4.75 13.52 18.28 1.73 4.93 6.66 4.01 11.41 15.42 0.50 1.41 1.91 2017 0.05 0.14 0.19 0.31 0.89 1.20 0.32 0.90 1.22 0.97 2.76 3.72 1.44 4.11 5.56 4.83 13.76 18.59 1.76 5.02 6.78 4.08 11.61 15.69 0.50 1.43 1.94 2018 0.05 0.14 0.19 0.32 0.91 1.23 0.32 0.92 1.24 0.99 2.82 3.80 1.48 4.20 5.68 4.90 13.95 18.85 1.79 5.09 6.87 4.14 11.77 15.91 0.51 1.46 1.97 2019 0.05 0.14 0.19 0.33 0.93 1.25 0.33 0.94 1.27 1.01 2.86 3.87 1.50 4.27 5.78 4.96 14.12 19.08 1.81 5.15 6.96 4.19 11.91 16.10 0.52 1.47 1.99 2020 0.05 0.15 0.20 0.33 0.94 1.27 0.33 0.95 1.28 1.02 2.90 3.92 1.52 4.33 5.86 5.01 14.26 19.27 1.83 5.20 7.03 4.23 12.03 16.26 0.52 1.49 2.01 2021 0.05 0.15 0.20 0.33 0.95 1.28 0.34 0.96 1.30 1.03 2.94 3.97 1.54 4.38 5.92 5.05 14.38 19.44 1.84 5.24 7.09 4.26 12.14 16.40 0.53 1.50 2.03 2022 0.05 0.15 0.20 0.34 0.96 1.30 0.34 0.97 1.31 1.04 2.97 4.01 1.56 4.43 5.98 5.09 14.49 19.58 1.86 5.28 7.14 4.30 12.23 16.52 0.53 1.51 2.04 2023 0.05 0.15 0.20 0.34 0.97 1.31 0.34 0.98 1.32 1.05 2.99 4.04 1.57 4.47 6.03 5.13 14.59 19.71 1.87 5.32 7.19 4.32 12.31 16.63 0.53 1.52 2.06 2024 0.05 0.15 0.20 0.34 0.97 1.32 0.35 0.99 1.33 1.06 3.01 4.07 1.58 4.50 6.08 5.16 14.67 19.83 1.88 5.35 7.23 4.35 12.38 16.73 0.54 1.53 2.07 2025 0.05 0.15 0.21 0.34 0.98 1.33 0.35 0.99 1.34 1.07 3.03 4.10 1.59 4.53 6.12 5.18 14.75 19.94 1.89 5.38 7.27 4.37 12.45 16.82 0.54 1.54 2.08 2026 0.05 0.15 0.21 0.35 0.99 1.33 0.35 1.00 1.35 1.07 3.05 4.12 1.60 4.55 6.15 5.21 14.82 20.03 1.90 5.40 7.30 4.39 12.51 16.90 0.54 1.55 2.09 2027 0.05 0.15 0.21 0.35 0.99 1.34 0.35 1.00 1.36 1.08 3.07 4.15 1.61 4.58 6.19 5.23 14.89 20.12 1.91 5.43 7.34 4.41 12.56 16.98 0.55 1.55 2.10 Total 0.86 2.44 3.30 5.53 #### #### 5.59 #### #### #### #### #### #### #### #### #### ##### ##### 32.85 #### ##### #### 216.40 292.43 9.40 26.75 ####

Avg. 0.03 0.10 0.13 0.22 0.63 0.85 0.22 0.64 0.86 0.68 1.95 2.63 1.02 2.90 3.92 3.60 10.26 13.86 1.31 3.74 5.05 3.04 8.66 11.70 0.38 1.07 1.45 Avg.  All Size Categories Note:

Source: TTHM  Alternative 3 40.45 Exhibit E. 21f Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 Ground Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 21a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005

2006 0.00 0.01 0.01 0.02 0.05 0.06 0.02 0.06 0.08 0.08 0.22 0.30 0.17 0.48 0.65 0.83 2.35 3.18 0.51 1.45 1.97 1.93 5.50 7.43 1.60 4.54 6.13 2007 0.01 0.02 0.02 0.04 0.11 0.15 0.05 0.13 0.18 0.19 0.53 0.72 0.40 1.14 1.54 1.97 5.60 7.57 1.22 3.46 4.68 4.60 13.09 17.68 3.80 10.81 14.60 2008 0.01 0.03 0.04 0.07 0.19 0.25 0.08 0.22 0.30 0.31 0.89 1.20 0.67 1.90 2.57 3.28 9.33 12.61 2.03 5.77 7.80 7.66 21.81 29.47 6.33 18.01 24.34 2009 0.01 0.04 0.05 0.09 0.27 0.36 0.11 0.32 0.43 0.45 1.28 1.73 0.96 2.73 3.68 4.70 13.38 18.08 2.91 8.27 11.17 10.98 31.25 42.23 9.07 25.81 34.87 2010 0.02 0.05 0.07 0.12 0.35 0.48 0.15 0.42 0.57 0.59 1.68 2.27 1.26 3.59 4.86 6.20 17.63 23.83 3.83 10.90 14.73 14.47 41.20 55.67 11.95 34.02 45.97 2011 0.02 0.07 0.09 0.15 0.44 0.59 0.18 0.52 0.71 0.74 2.11 2.84 1.58 4.50 6.08 7.75 22.05 29.80 4.79 13.63 18.42 18.10 51.52 69.62 14.95 42.54 57.49 2012 0.03 0.08 0.11 0.19 0.53 0.72 0.22 0.63 0.85 0.89 2.54 3.43 1.90 5.42 7.33 8.52 24.24 32.76 5.26 14.98 20.25 19.90 56.63 76.53 16.43 46.77 63.20 2013 0.03 0.09 0.13 0.22 0.62 0.84 0.26 0.74 1.00 1.05 2.98 4.03 2.24 6.37 8.61 9.01 25.63 34.64 5.57 15.85 21.41 21.04 59.89 80.93 17.38 49.46 66.83 2014 0.04 0.11 0.15 0.25 0.72 0.97 0.30 0.85 1.15 1.21 3.43 4.64 2.58 7.33 9.91 9.35 26.62 35.98 5.78 16.46 22.24 21.86 62.20 84.06 18.05 51.37 69.42 2015 0.04 0.12 0.16 0.27 0.77 1.04 0.32 0.91 1.23 1.29 3.67 4.95 2.75 7.83 10.58 9.62 27.37 36.99 5.95 16.92 22.87 22.47 63.96 86.43 18.56 52.81 71.37 2016 0.04 0.12 0.16 0.28 0.80 1.08 0.33 0.95 1.28 1.34 3.82 5.16 2.87 8.15 11.02 9.83 27.97 37.79 6.07 17.29 23.36 22.96 65.34 88.30 18.96 53.96 72.91 2017 0.04 0.12 0.17 0.29 0.82 1.11 0.34 0.98 1.32 1.38 3.93 5.31 2.95 8.39 11.34 10.00 28.45 38.44 6.18 17.59 23.76 23.35 66.47 89.82 19.28 54.89 74.17 2018 0.04 0.13 0.17 0.30 0.84 1.13 0.35 1.00 1.35 1.41 4.02 5.43 3.01 8.58 11.59 10.14 28.85 38.99 6.27 17.83 24.10 23.68 67.40 91.09 19.56 55.66 75.22 2019 0.05 0.13 0.17 0.30 0.85 1.15 0.36 1.02 1.37 1.44 4.09 5.52 3.07 8.72 11.79 10.26 29.19 39.45 6.34 18.04 24.38 23.96 68.20 92.16 19.79 56.32 76.11 2020 0.05 0.13 0.18 0.30 0.87 1.17 0.36 1.03 1.39 1.46 4.14 5.60 3.11 8.85 11.95 10.36 29.48 39.84 6.40 18.23 24.63 24.20 68.89 93.09 19.99 56.89 76.87 2021 0.05 0.13 0.18 0.31 0.88 1.18 0.37 1.04 1.41 1.47 4.19 5.66 3.14 8.95 12.09 10.45 29.74 40.19 6.46 18.38 24.84 24.41 69.48 93.90 20.16 57.38 77.54 2022 0.05 0.13 0.18 0.31 0.88 1.20 0.37 1.05 1.42 1.49 4.23 5.72 3.18 9.04 12.21 10.53 29.97 40.49 6.51 18.52 25.03 24.60 70.01 94.61 20.31 57.81 78.13 2023 0.05 0.13 0.18 0.31 0.89 1.21 0.37 1.06 1.43 1.50 4.27 5.77 3.20 9.11 12.32 10.60 30.17 40.76 6.55 18.65 25.20 24.76 70.48 95.24 20.45 58.20 78.65 2024 0.05 0.14 0.18 0.32 0.90 1.22 0.38 1.07 1.44 1.51 4.30 5.81 3.23 9.18 12.41 10.66 30.34 41.01 6.59 18.76 25.35 24.91 70.90 95.80 20.57 58.54 79.11 2025 0.05 0.14 0.18 0.32 0.90 1.22 0.38 1.08 1.45 1.52 4.33 5.85 3.25 9.24 12.49 10.72 30.51 41.22 6.63 18.86 25.48 25.04 71.27 96.31 20.68 58.86 79.54 2026 0.05 0.14 0.19 0.32 0.91 1.23 0.38 1.08 1.46 1.53 4.35 5.88 3.27 9.30 12.56 10.77 30.65 41.42 6.66 18.95 25.61 25.16 71.61 96.78 20.78 59.14 79.92 2027 0.05 0.14 0.19 0.32 0.91 1.24 0.38 1.09 1.47 1.54 4.38 5.91 3.28 9.34 12.63 10.82 30.79 41.60 6.69 19.03 25.72 25.27 71.93 97.20 20.87 59.40 80.26 Total 0.77 2.19 2.95 5.10 14.51 19.60 6.06 17.25 23.31 24.37 69.37 93.75 52.05 148.15 200.20 186.33 530.33 716.66 115.18 327.82 443.00 435.33 1,239.02 1,674.35 359.49 1,023.17 1,382.66 Avg. 0.03 0.09 0.12 0.20 0.58 0.78 0.24 0.69 0.93 0.97 2.77 3.75 2.08 5.93 8.01 7.45 21.21 28.67 4.61 13.11 17.72 17.41 49.56 66.97 14.38 40.93 55.31 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 16 and E. 17a. 50,001 100,000 100,001 1 Million > 1 Million 182.26 Exhibit E. 21g Yearly Cancer Cases Avoided by System Size All Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  Preferred Alternative Economic Analysis for the Stage 2 DBPR July 2003 Section E. 6.6 Projection of Cases  Stage 2 Cessation Lag Sensitivity Analysis TTHM as Indicator Economic Analysis for the Stage 2 DBPR July 2003 Annual Existing Cancer Cases  Pre Stage 2 DBPR Annual Existing Cancer Cases  Post Stage 2 Annual Reductions in Bladder Cancer Cases Attributable to the Stage 2 DBPR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.11 0.84 0.95 < 100 0.11 0.82 0.93 < 100 0.01 0.02 0.02 101 500 0.82 5.41 6.23 101 500 0.78 5.29 6.08 101 500 0.04 0.12 0.16 501 1,000 1.43 5.47 6.90 501 1,000 1.36 5.35 6.71 501 1,000 0.07 0.12 0.19 1,001 3,300 8.20 16.74 24.94 1,001 3,300 7.81 16.37 24.18 1,001 3,300 0.39 0.37 0.76 3,301 10,000 22.53 24.98 47.51 3,301 10,000 21.47 24.43 45.90 3,301 10,000 1.07 0.55 1.62 10,001 50,000 93.44 51.52 144.96 10,001 50,000 89.03 50.65 139.67 10,001 50,000 4.42 0.87 5.29 50,001 100,000 62.43 18.78 81.21 50,001 100,000 59.48 18.47 77.94 50,001 100,000 2.95 0.32 3.27 100,001 1 Million 245.77 43.47 289.24 100,001 1 Million 234.16 42.74 276.89 100,001 1 Million 11.62 0.73 12.35 > 1 Million 213.86 5.37 219.23 > 1 Million 203.75 5.28 209.03 > 1 Million 10.11 0.09 10.20 Total 648.59 172.59 821.17 Total 617.93 169.39 787.33 Total 30.65 3.19 33.84 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.98 7.32 8.31 < 100 0.94 7.16 8.10 < 100 0.05 0.16 0.21 101 500 7.16 47.25 54.41 101 500 6.82 46.21 53.03 101 500 0.34 1.04 1.38 501 1,000 12.44 47.76 60.20 501 1,000 11.85 46.71 58.56 501 1,000 0.59 1.05 1.64 1,001 3,300 71.53 146.09 217.62 1,001 3,300 68.15 142.86 211.02 1,001 3,300 3.38 3.22 6.61 3,301 10,000 196.66 218.00 414.66 3,301 10,000 187.36 213.18 400.55 3,301 10,000 9.29 4.81 14.11 10,001 50,000 815.50 449.59 1,265.09 10,001 50,000 776.96 442.01 1,218.96 10,001 50,000 38.54 7.59 46.13 50,001 100,000 544.81 163.93 708.74 50,001 100,000 519.06 161.16 680.22 50,001 100,000 25.75 2.77 28.52 100,001 1 Million 2,144.92 379.36 2,524.28 100,001 1 Million 2,043.54 372.96 2,416.50 100,001 1 Million 101.38 6.40 107.78 > 1 Million 1,866.38 46.90 1,913.28 > 1 Million 1,778.17 46.10 1,824.28 > 1 Million 88.21 0.79 89.00 Total 5,660.38 1,506.20 7,166.58 Total 5,392.85 1,478.35 6,871.21 Total 267.53 27.85 295.37 Source: Derived from figures presented in Appendix E. Annual Existing Cases  Post Stage 2 System Size ( Population Served) Annual Existing Cases  Post Stage 2 System Size ( Population Served)

System Size ( Population Served) Annual Cases Reduced by Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 Exhibit E. 22a Expanded Cancer Case Inputs for Benefits Quantification ( TTHM  Cessation Lag Sensitivity Analysis)

System Size ( Population Served) Annual Cases Reduced by Stage 2 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.03 0.04 0.03 0.09 0.12 0.19 0.54 0.74 0.13 0.36 0.49 0.50 1.43 1.94 0.44 1.25 1.68 2006 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.01 0.02 0.06 0.09 0.06 0.18 0.24 0.38 1.09 1.47 0.26 0.73 0.98 1.01 2.87 3.87 0.88 2.49 3.37 2007 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.02 0.03 0.10 0.13 0.09 0.26 0.36 0.57 1.63 2.21 0.38 1.09 1.48 1.51 4.30 5.81 1.31 3.74 5.05 2008 0.00 0.00 0.00 0.00 0.01 0.02 0.01 0.02 0.03 0.04 0.13 0.17 0.12 0.35 0.47 0.77 2.18 2.94 0.51 1.46 1.97 2.01 5.73 7.74 1.75 4.99 6.74 2009 0.00 0.00 0.00 0.01 0.02 0.02 0.01 0.03 0.04 0.06 0.16 0.22 0.15 0.44 0.59 0.96 2.72 3.68 0.64 1.82 2.46 2.52 7.16 9.68 2.19 6.23 8.42 2010 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.03 0.04 0.07 0.19 0.26 0.18 0.53 0.71 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2011 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.04 0.05 0.08 0.22 0.30 0.22 0.61 0.83 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2012 0.00 0.00 0.00 0.01 0.03 0.03 0.02 0.04 0.06 0.09 0.25 0.34 0.25 0.70 0.95 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2013 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2014 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2015 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2016 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2017 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2018 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2019 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2020 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2021 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2022 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2023 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2024 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2025 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2026 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 2027 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.29 0.39 0.28 0.79 1.07 1.15 3.27 4.42 0.77 2.18 2.95 3.02 8.60 11.62 2.63 7.48 10.11 Total 0.03 0.07 0.10 0.19 0.55 0.74 0.33 0.95 1.28 1.91 5.45 7.36 5.26 #### 20.24 #### #### #### #### #### #### #### ##### ##### #### ##### #####

Avg. 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.04 0.05 0.08 0.22 0.29 0.21 0.60 0.81 0.94 2.68 3.62 0.63 1.79 2.42 2.48 7.05 9.53 2.15 6.13 8.29 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 22a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 TTHM  Cessation Lag Sensitivity Analysis 25.04 Exhibit E. 22b Yearly Cancer Cases Avoided by System Size 50,001 100,000 100,001 1 Million > 1 Million 101 500 Surface Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.01 0.01 0.03 0.04 0.02 0.05 0.06 0.04 0.11 0.14 0.01 0.04 0.05 0.03 0.09 0.12 0.00 0.01 0.02 2006 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.02 0.03 0.02 0.06 0.08 0.03 0.09 0.12 0.08 0.21 0.29 0.03 0.08 0.11 0.06 0.18 0.24 0.01 0.02 0.03 2007 0.00 0.00 0.01 0.01 0.03 0.04 0.01 0.03 0.04 0.03 0.09 0.12 0.05 0.14 0.18 0.11 0.32 0.43 0.04 0.12 0.16 0.10 0.27 0.37 0.01 0.03 0.05 2008 0.00 0.01 0.01 0.01 0.04 0.05 0.01 0.04 0.05 0.04 0.12 0.16 0.06 0.18 0.25 0.15 0.43 0.58 0.05 0.16 0.21 0.13 0.36 0.49 0.02 0.04 0.06 2009 0.00 0.01 0.01 0.02 0.05 0.07 0.02 0.05 0.07 0.05 0.15 0.21 0.08 0.23 0.31 0.19 0.54 0.72 0.07 0.20 0.26 0.16 0.45 0.61 0.02 0.06 0.08 2010 0.00 0.01 0.01 0.02 0.06 0.08 0.02 0.06 0.08 0.06 0.18 0.25 0.10 0.27 0.37 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2011 0.00 0.01 0.01 0.02 0.07 0.09 0.02 0.07 0.09 0.07 0.21 0.29 0.11 0.32 0.43 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2012 0.00 0.01 0.02 0.03 0.08 0.11 0.03 0.08 0.11 0.09 0.24 0.33 0.13 0.36 0.49 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2013 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2014 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2015 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2016 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2017 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2018 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2019 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2020 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2021 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2022 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2023 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2024 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2025 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2026 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 2027 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.23 0.64 0.87 0.08 0.23 0.32 0.19 0.54 0.73 0.02 0.07 0.09 Total 0.09 0.26 0.35 0.59 1.68 2.27 0.60 1.70 2.30 1.83 5.20 7.02 2.72 7.75 #### 4.63 #### #### 1.69 4.81 6.50 3.91 #### #### 0.48 1.38 1.86 Avg. 0.00 0.01 0.01 0.02 0.07 0.09 0.02 0.07 0.09 0.07 0.21 0.28 0.11 0.31 0.42 0.19 0.53 0.71 0.07 0.19 0.26 0.16 0.45 0.60 0.02 0.06 0.07 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 22a. 50,001 100,000 100,001 1 Million > 1 Million 2.55 Exhibit E. 22c Yearly Cancer Cases Avoided by System Size Ground Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  Cessation Lag Sensitivity Analysis Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005 0.00 0.00 0.00 0.00 0.01 0.02 0.01 0.02 0.02 0.02 0.06 0.08 0.05 0.13 0.18 0.23 0.65 0.88 0.14 0.40 0.54 0.54 1.52 2.06 0.44 1.26 1.70 2006 0.00 0.00 0.01 0.01 0.03 0.04 0.01 0.03 0.04 0.04 0.12 0.17 0.09 0.27 0.36 0.46 1.30 1.76 0.28 0.81 1.09 1.07 3.05 4.12 0.88 2.52 3.40 2007 0.00 0.01 0.01 0.01 0.04 0.05 0.02 0.05 0.06 0.07 0.19 0.25 0.14 0.40 0.54 0.69 1.96 2.64 0.42 1.21 1.63 1.61 4.57 6.17 1.33 3.77 5.10 2008 0.00 0.01 0.01 0.02 0.05 0.07 0.02 0.06 0.08 0.09 0.25 0.34 0.19 0.53 0.72 0.92 2.61 3.52 0.57 1.61 2.18 2.14 6.09 8.23 1.77 5.03 6.80 2009 0.00 0.01 0.01 0.02 0.07 0.09 0.03 0.08 0.10 0.11 0.31 0.42 0.23 0.66 0.90 1.15 3.26 4.40 0.71 2.01 2.72 2.68 7.62 10.29 2.21 6.29 8.50 2010 0.00 0.01 0.02 0.03 0.08 0.11 0.03 0.09 0.13 0.13 0.37 0.50 0.28 0.80 1.08 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2011 0.00 0.01 0.02 0.03 0.09 0.12 0.04 0.11 0.15 0.15 0.44 0.59 0.33 0.93 1.26 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2012 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.12 0.17 0.17 0.50 0.67 0.37 1.06 1.44 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2013 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2014 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2015 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2016 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2017 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2018 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2019 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2020 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2021 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2022 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2023 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2024 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2025 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2026 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 2027 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.14 0.19 0.20 0.56 0.76 0.42 1.20 1.62 1.37 3.91 5.29 0.85 2.42 3.27 3.21 9.14 12.35 2.65 7.55 10.20 Total 0.12 0.34 0.45 0.78 2.23 3.01 0.93 2.65 3.58 3.74 10.64 14.38 7.99 22.73 30.71 28.17 80.19 108.36 17.42 49.57 66.98 65.82 187.34 253.17 54.36 154.71 209.06 Avg. 0.00 0.01 0.02 0.03 0.09 0.12 0.04 0.11 0.14 0.15 0.43 0.58 0.32 0.91 1.23 1.13 3.21 4.33 0.70 1.98 2.68 2.63 7.49 10.13 2.17 6.19 8.36 Avg.  All Size Categories Note:

Source: TTHM  Cessation Lag Sensitivity Analysis 27.59 Exhibit E. 22d Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 All Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 22a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.10 0.28 0.38 0.27 0.76 1.03 1.67 4.75 6.42 1.12 3.18 4.29 4.39 12.50 16.90 3.82 10.88 14.70 2006 0.00 0.01 0.01 0.02 0.06 0.08 0.03 0.10 0.13 0.20 0.56 0.75 0.54 1.53 2.07 3.34 9.51 12.85 2.23 6.35 8.58 8.79 25.01 33.79 7.64 21.76 29.40 2007 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.15 0.20 0.29 0.83 1.13 0.81 2.29 3.10 5.01 14.26 19.27 3.35 9.53 12.87 13.18 37.51 50.69 11.47 32.64 44.11 2008 0.01 0.02 0.02 0.04 0.11 0.15 0.07 0.19 0.26 0.39 1.11 1.50 1.07 3.06 4.13 6.68 19.01 25.70 4.46 12.70 17.17 17.57 50.01 67.58 15.29 43.52 58.81 2009 0.01 0.02 0.03 0.05 0.14 0.19 0.08 0.24 0.33 0.49 1.39 1.88 1.34 3.82 5.16 8.35 23.77 32.12 5.58 15.88 21.46 21.96 62.51 84.48 19.11 54.40 73.51 2010 0.01 0.02 0.03 0.06 0.17 0.23 0.10 0.29 0.39 0.59 1.67 2.25 1.61 4.59 6.20 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2011 0.01 0.03 0.04 0.07 0.19 0.26 0.12 0.34 0.46 0.68 1.95 2.63 1.88 5.35 7.23 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2012 0.01 0.03 0.04 0.08 0.22 0.30 0.14 0.39 0.52 0.78 2.22 3.01 2.15 6.11 8.26 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2013 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2014 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2015 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2016 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2017 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2018 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2019 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2020 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2021 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2022 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2023 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2024 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2025 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2026 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 2027 0.01 0.03 0.05 0.09 0.25 0.34 0.15 0.44 0.59 0.88 2.50 3.38 2.42 6.88 9.29 10.02 28.52 38.54 6.69 19.05 25.75 26.36 75.02 101.38 22.93 65.28 88.21 Total 0.23 0.65 0.88 1.67 4.76 6.43 2.90 8.27 11.17 16.70 47.54 64.24 45.92 130.68 176.60 205.43 584.70 790.13 137.24 390.62 527.86 540.33 1,537.86 2,078.19 470.16 1,338.16 1,808.32 Avg. 0.01 0.03 0.04 0.07 0.19 0.26 0.12 0.33 0.45 0.67 1.90 2.57 1.84 5.23 7.06 8.22 23.39 31.61 5.49 15.62 21.11 21.61 61.51 83.13 18.81 53.53 72.33 Avg.  All Size Categories Note:

Source: Exhibit E. 22e Yearly Cancer Cases Avoided by System Size Surface Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  Cessation Lag Sensitivity Analysis Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 22a. Detail may not add to totals due to independent rounding. 50,001 100,000 100,001 1 Million > 1 Million 218.55 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.09 0.27 0.36 0.14 0.40 0.53 0.33 0.94 1.26 0.12 0.34 0.46 0.28 0.79 1.07 0.03 0.10 0.13 2006 0.01 0.03 0.04 0.06 0.17 0.23 0.06 0.17 0.23 0.19 0.53 0.72 0.28 0.79 1.07 0.66 1.87 2.53 0.24 0.68 0.92 0.55 1.58 2.13 0.07 0.20 0.26 2007 0.01 0.04 0.05 0.09 0.26 0.35 0.09 0.26 0.35 0.28 0.80 1.07 0.42 1.19 1.60 0.99 2.81 3.79 0.36 1.02 1.38 0.83 2.37 3.20 0.10 0.29 0.40 2008 0.02 0.05 0.07 0.12 0.34 0.46 0.12 0.35 0.47 0.37 1.06 1.43 0.56 1.58 2.14 1.32 3.74 5.06 0.48 1.37 1.84 1.11 3.16 4.27 0.14 0.39 0.53 2009 0.02 0.07 0.09 0.15 0.43 0.58 0.15 0.43 0.59 0.47 1.33 1.79 0.70 1.98 2.67 1.64 4.68 6.32 0.60 1.71 2.31 1.39 3.95 5.34 0.17 0.49 0.66 2010 0.03 0.08 0.11 0.18 0.51 0.70 0.18 0.52 0.70 0.56 1.59 2.15 0.83 2.37 3.21 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2011 0.03 0.09 0.13 0.21 0.60 0.81 0.21 0.61 0.82 0.65 1.86 2.51 0.97 2.77 3.74 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2012 0.04 0.11 0.14 0.24 0.69 0.93 0.24 0.69 0.94 0.75 2.12 2.87 1.11 3.17 4.28 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2013 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2014 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2015 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2016 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2017 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2018 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2019 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2020 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2021 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2022 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2023 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2024 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2025 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2026 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 2027 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 1.97 5.62 7.59 0.72 2.05 2.77 1.66 4.74 6.40 0.21 0.59 0.79 Total 0.80 2.27 3.07 5.15 #### #### 5.21 14.82 #### #### #### #### #### #### #### #### 115.13 ##### 14.75 #### #### #### #### ##### 4.22 #### ####

Avg. 0.03 0.09 0.12 0.21 0.59 0.79 0.21 0.59 0.80 0.64 1.81 2.45 0.95 2.71 3.66 1.62 4.61 6.22 0.59 1.68 2.27 1.37 3.89 5.25 0.17 0.48 0.65 Avg.  All Size Categories Note:

Source: TTHM  Cessation Lag Sensitivity Analysis 22.22 Exhibit E. 22f Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 Ground Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 22a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005 0.01 0.02 0.02 0.04 0.11 0.15 0.05 0.14 0.18 0.19 0.54 0.73 0.41 1.16 1.57 2.00 5.69 7.69 1.24 3.52 4.75 4.67 13.29 17.96 3.86 10.98 14.83 2006 0.01 0.03 0.05 0.08 0.23 0.31 0.09 0.27 0.36 0.38 1.09 1.47 0.82 2.32 3.13 4.00 11.38 15.38 2.47 7.03 9.51 9.34 26.59 35.93 7.71 21.95 29.67 2007 0.02 0.05 0.07 0.12 0.34 0.46 0.14 0.41 0.55 0.57 1.63 2.20 1.22 3.48 4.70 6.00 17.07 23.07 3.71 10.55 14.26 14.01 39.88 53.89 11.57 32.93 44.50 2008 0.02 0.07 0.09 0.16 0.45 0.61 0.19 0.54 0.73 0.76 2.17 2.94 1.63 4.64 6.27 8.00 22.76 30.75 4.94 14.07 19.01 18.68 53.17 71.85 15.43 43.91 59.33 2009 0.03 0.09 0.12 0.20 0.57 0.77 0.24 0.68 0.91 0.95 2.72 3.67 2.04 5.80 7.84 10.00 28.45 38.44 6.18 17.59 23.76 23.35 66.46 89.82 19.28 54.88 74.17 2010 0.04 0.10 0.14 0.24 0.68 0.92 0.28 0.81 1.09 1.15 3.26 4.40 2.45 6.96 9.40 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2011 0.04 0.12 0.16 0.28 0.80 1.07 0.33 0.95 1.28 1.34 3.80 5.14 2.85 8.12 10.97 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2012 0.05 0.14 0.19 0.32 0.91 1.23 0.38 1.08 1.46 1.53 4.35 5.87 3.26 9.28 12.54 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2013 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2014 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2015 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2016 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2017 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2018 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2019 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2020 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2021 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2022 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2023 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2024 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2025 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2026 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 2027 0.05 0.15 0.21 0.36 1.02 1.38 0.43 1.22 1.64 1.72 4.89 6.61 3.67 10.44 14.11 11.99 34.14 46.13 7.41 21.10 28.52 28.02 79.76 107.78 23.14 65.86 89.00 Total 1.03 2.93 3.96 6.82 19.42 26.25 8.11 23.09 31.20 32.63 92.88 125.51 69.69 198.34 268.03 245.88 699.82 945.70 151.99 432.59 584.59 574.46 1,635.00 2,209.46 474.38 1,350.17 1,824.55 Avg. 0.04 0.12 0.16 0.27 0.78 1.05 0.32 0.92 1.25 1.31 3.72 5.02 2.79 7.93 10.72 9.84 27.99 37.83 6.08 17.30 23.38 22.98 65.40 88.38 18.98 54.01 72.98 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 22a. 50,001 100,000 100,001 1 Million > 1 Million 240.77 Exhibit E. 22g Yearly Cancer Cases Avoided by System Size All Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  Cessation Lag Sensitivity Analysis Economic Analysis for the Stage 2 DBPR July 2003 Section E. 6.7 Projection of Cases  Stage 2 IDSE Sensitivity Analysis 1 TTHM as Indicator Economic Analysis for the Stage 2 DBPR July 2003 Annual Existing Cancer Cases  Pre Stage 2 DBPR Annual Existing Cancer Cases  Post Stage 2 Annual Reductions in Bladder Cancer Cases Attributable to the Stage 2 DBPR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.11 0.84 0.95 < 100 0.10 0.82 0.92 < 100 0.01 0.02 0.03 101 500 0.82 5.41 6.23 101 500 0.74 5.26 6.00 101 500 0.08 0.15 0.23 501 1,000 1.43 5.47 6.90 501 1,000 1.29 5.32 6.60 501 1,000 0.14 0.15 0.29 1,001 3,300 8.20 16.74 24.94 1,001 3,300 7.39 16.27 23.66 1,001 3,300 0.80 0.47 1.28 3,301 10,000 22.53 24.98 47.51 3,301 10,000 20.32 24.27 44.59 3,301 10,000 2.21 0.71 2.92 10,001 50,000 93.44 51.52 144.96 10,001 50,000 84.27 49.85 134.12 10,001 50,000 9.18 1.66 10.84 50,001 100,000 62.43 18.78 81.21 50,001 100,000 56.30 18.18 74.47 50,001 100,000 6.13 0.61 6.74 100,001 1 Million 245.77 43.47 289.24 100,001 1 Million 221.64 42.06 263.70 100,001 1 Million 24.13 1.40 25.54 > 1 Million 213.86 5.37 219.23 > 1 Million 192.86 5.20 198.06 > 1 Million 21.00 0.17 21.17 Total 648.59 172.59 821.17 Total 584.90 167.23 752.12 Total 63.69 5.36 69.05 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.98 7.32 8.31 < 100 0.89 7.12 8.00 < 100 0.10 0.21 0.30 101 500 7.16 47.25 54.41 101 500 6.46 45.92 52.37 101 500 0.70 1.33 2.04 501 1,000 12.44 47.76 60.20 501 1,000 11.22 46.41 57.63 501 1,000 1.22 1.35 2.57 1,001 3,300 71.53 146.09 217.62 1,001 3,300 64.51 141.96 206.47 1,001 3,300 7.02 4.13 11.15 3,301 10,000 196.66 218.00 414.66 3,301 10,000 177.35 211.84 389.19 3,301 10,000 19.31 6.16 25.47 10,001 50,000 815.50 449.59 1,265.09 10,001 50,000 735.42 435.07 1,170.49 10,001 50,000 80.08 14.53 94.61 50,001 100,000 544.81 163.93 708.74 50,001 100,000 491.31 158.63 649.94 50,001 100,000 53.50 5.30 58.79 100,001 1 Million 2,144.92 379.36 2,524.28 100,001 1 Million 1,934.30 367.10 2,301.41 100,001 1 Million 210.61 12.26 222.87 > 1 Million 1,866.38 46.90 1,913.28 > 1 Million 1,683.12 45.38 1,728.50 > 1 Million 183.26 1.52 184.78 Total 5,660.38 1,506.20 7,166.58 Total 5,104.58 1,459.42 6,564.00 Total 555.80 46.78 602.58 Source: Derived from figures presented in Appendix E. Annual Existing Cases  Post Stage 2 System Size ( Population Served) Annual Existing Cases  Post Stage 2 System Size ( Population Served)

System Size ( Population Served) Annual Cases Reduced by Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 Exhibit E. 23a Expanded Cancer Case Inputs for Benefits Quantification ( TTHM  IDSE Sensitivity Analysis 1)

System Size ( Population Served) Annual Cases Reduced by Stage 2 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.03 0.04 0.03 0.08 0.10 0.16 0.47 0.63 0.11 0.31 0.42 0.43 1.23 1.66 0.38 1.07 1.45 2007 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.02 0.02 0.07 0.09 0.06 0.18 0.24 0.39 1.11 1.51 0.26 0.74 1.01 1.03 2.93 3.96 0.90 2.55 3.45 2008 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.03 0.04 0.11 0.15 0.10 0.30 0.40 0.65 1.86 2.51 0.44 1.24 1.68 1.72 4.88 6.60 1.49 4.25 5.74 2009 0.00 0.00 0.00 0.01 0.02 0.02 0.01 0.03 0.04 0.05 0.16 0.21 0.15 0.43 0.58 0.93 2.66 3.60 0.62 1.78 2.40 2.46 7.00 9.46 2.14 6.09 8.23 2010 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.04 0.05 0.07 0.21 0.28 0.20 0.56 0.76 1.23 3.51 4.74 0.82 2.34 3.17 3.24 9.22 12.47 2.82 8.03 10.85 2011 0.00 0.00 0.00 0.01 0.03 0.03 0.02 0.04 0.06 0.09 0.26 0.35 0.25 0.71 0.95 1.54 4.39 5.93 1.03 2.93 3.96 4.05 11.54 15.59 3.53 10.04 13.56 2012 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.05 0.07 0.11 0.31 0.42 0.30 0.85 1.15 1.69 4.82 6.52 1.13 3.22 4.35 4.46 12.68 17.14 3.88 11.03 14.91 2013 0.00 0.00 0.01 0.01 0.04 0.05 0.02 0.06 0.09 0.13 0.36 0.49 0.35 1.00 1.35 1.79 5.10 6.89 1.20 3.41 4.60 4.71 13.41 18.12 4.10 11.67 15.77 2014 0.00 0.01 0.01 0.01 0.04 0.06 0.03 0.07 0.10 0.15 0.42 0.57 0.40 1.15 1.55 1.86 5.30 7.16 1.24 3.54 4.78 4.89 13.93 18.82 4.26 12.12 16.38 2015 0.00 0.01 0.01 0.02 0.04 0.06 0.03 0.08 0.10 0.16 0.45 0.60 0.43 1.23 1.66 1.91 5.44 7.36 1.28 3.64 4.92 5.03 14.32 19.35 4.38 12.46 16.84 2016 0.00 0.01 0.01 0.02 0.05 0.06 0.03 0.08 0.11 0.16 0.47 0.63 0.45 1.28 1.73 1.95 5.56 7.52 1.31 3.72 5.02 5.14 14.63 19.77 4.47 12.73 17.20 2017 0.00 0.01 0.01 0.02 0.05 0.06 0.03 0.08 0.11 0.17 0.48 0.65 0.46 1.32 1.78 1.99 5.66 7.65 1.33 3.78 5.11 5.23 14.88 20.11 4.55 12.95 17.50 2018 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.11 0.17 0.49 0.66 0.47 1.35 1.82 2.02 5.74 7.75 1.35 3.83 5.18 5.30 15.09 20.40 4.61 13.13 17.75 2019 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.17 0.50 0.67 0.48 1.37 1.85 2.04 5.81 7.85 1.36 3.88 5.24 5.37 15.27 20.64 4.67 13.29 17.96 2020 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.18 0.50 0.68 0.49 1.39 1.87 2.06 5.86 7.92 1.38 3.92 5.29 5.42 15.42 20.84 4.72 13.42 18.14 2021 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.18 0.51 0.69 0.49 1.40 1.90 2.08 5.92 7.99 1.39 3.95 5.34 5.47 15.56 21.02 4.76 13.54 18.29 2022 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.18 0.52 0.70 0.50 1.42 1.92 2.09 5.96 8.05 1.40 3.98 5.38 5.51 15.68 21.18 4.79 13.64 18.43 2023 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.18 0.52 0.70 0.50 1.43 1.93 2.11 6.00 8.11 1.41 4.01 5.42 5.54 15.78 21.33 4.82 13.73 18.56 2024 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.18 0.52 0.71 0.51 1.44 1.95 2.12 6.04 8.16 1.42 4.03 5.45 5.58 15.87 21.45 4.85 13.81 18.67 2025 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.19 0.53 0.71 0.51 1.45 1.96 2.13 6.07 8.20 1.42 4.05 5.48 5.61 15.96 21.57 4.88 13.89 18.77 2026 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.19 0.53 0.72 0.51 1.46 1.97 2.14 6.10 8.24 1.43 4.07 5.50 5.63 16.04 21.67 4.90 13.95 18.86 2027 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.13 0.19 0.53 0.72 0.51 1.47 1.98 2.15 6.12 8.27 1.44 4.09 5.53 5.66 16.10 21.76 4.92 14.01 18.94 Total 0.04 0.12 0.16 0.30 0.85 1.14 0.52 1.47 1.99 2.97 8.45 #### 8.16 #### 31.40 #### ##### 142.54 #### #### #### #### ##### ##### #### ##### #####

Avg. 0.00 0.00 0.01 0.01 0.03 0.05 0.02 0.06 0.08 0.12 0.34 0.46 0.33 0.93 1.26 1.48 4.22 5.70 0.99 2.82 3.81 3.90 11.10 15.00 3.39 9.66 13.05 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 23a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 TTHM  IDSE Sensitivity Analysis 1 39.40 Exhibit E. 23b Yearly Cancer Cases Avoided by System Size 50,001 100,000 100,001 1 Million > 1 Million 101 500 Surface Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.01 0.01 0.02 0.02 0.01 0.02 0.03 0.03 0.08 0.11 0.01 0.03 0.04 0.03 0.07 0.10 0.00 0.01 0.01 2007 0.00 0.00 0.00 0.00 0.01 0.02 0.00 0.01 0.02 0.01 0.04 0.05 0.02 0.06 0.08 0.07 0.20 0.27 0.03 0.07 0.10 0.06 0.17 0.23 0.01 0.02 0.03 2008 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.02 0.03 0.02 0.06 0.09 0.03 0.10 0.13 0.12 0.34 0.46 0.04 0.12 0.17 0.10 0.28 0.38 0.01 0.04 0.05 2009 0.00 0.00 0.01 0.01 0.03 0.04 0.01 0.03 0.04 0.03 0.09 0.12 0.05 0.14 0.18 0.17 0.48 0.65 0.06 0.18 0.24 0.14 0.41 0.55 0.02 0.05 0.07 2010 0.00 0.01 0.01 0.01 0.04 0.05 0.01 0.04 0.05 0.04 0.12 0.16 0.06 0.18 0.24 0.22 0.64 0.86 0.08 0.23 0.31 0.19 0.54 0.73 0.02 0.07 0.09 2011 0.00 0.01 0.01 0.02 0.05 0.07 0.02 0.05 0.07 0.05 0.15 0.20 0.08 0.22 0.30 0.28 0.80 1.08 0.10 0.29 0.39 0.24 0.67 0.91 0.03 0.08 0.11 2012 0.00 0.01 0.01 0.02 0.06 0.08 0.02 0.06 0.08 0.06 0.18 0.25 0.10 0.27 0.37 0.31 0.87 1.18 0.11 0.32 0.43 0.26 0.74 1.00 0.03 0.09 0.12 2013 0.00 0.01 0.01 0.02 0.07 0.09 0.02 0.07 0.09 0.08 0.21 0.29 0.11 0.32 0.43 0.33 0.93 1.25 0.12 0.34 0.46 0.27 0.78 1.05 0.03 0.10 0.13 2014 0.00 0.01 0.02 0.03 0.08 0.11 0.03 0.08 0.11 0.09 0.25 0.33 0.13 0.37 0.50 0.34 0.96 1.30 0.12 0.35 0.47 0.28 0.81 1.10 0.04 0.10 0.14 2015 0.00 0.01 0.02 0.03 0.08 0.11 0.03 0.09 0.12 0.09 0.26 0.35 0.14 0.39 0.53 0.35 0.99 1.34 0.13 0.36 0.49 0.29 0.83 1.13 0.04 0.10 0.14 2016 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.27 0.37 0.14 0.41 0.55 0.35 1.01 1.36 0.13 0.37 0.50 0.30 0.85 1.15 0.04 0.11 0.14 2017 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.28 0.38 0.15 0.42 0.57 0.36 1.03 1.39 0.13 0.37 0.51 0.30 0.87 1.17 0.04 0.11 0.14 2018 0.01 0.01 0.02 0.03 0.09 0.13 0.03 0.09 0.13 0.10 0.29 0.39 0.15 0.43 0.58 0.37 1.04 1.41 0.13 0.38 0.51 0.31 0.88 1.19 0.04 0.11 0.15 2019 0.01 0.01 0.02 0.03 0.09 0.13 0.03 0.10 0.13 0.10 0.29 0.40 0.15 0.44 0.59 0.37 1.05 1.42 0.13 0.38 0.52 0.31 0.89 1.20 0.04 0.11 0.15 2020 0.01 0.01 0.02 0.03 0.10 0.13 0.03 0.10 0.13 0.10 0.30 0.40 0.16 0.44 0.60 0.37 1.06 1.44 0.14 0.39 0.52 0.32 0.90 1.21 0.04 0.11 0.15 2021 0.01 0.02 0.02 0.03 0.10 0.13 0.03 0.10 0.13 0.11 0.30 0.41 0.16 0.45 0.60 0.38 1.07 1.45 0.14 0.39 0.53 0.32 0.91 1.22 0.04 0.11 0.15 2022 0.01 0.02 0.02 0.03 0.10 0.13 0.03 0.10 0.13 0.11 0.30 0.41 0.16 0.45 0.61 0.38 1.08 1.46 0.14 0.39 0.53 0.32 0.91 1.23 0.04 0.11 0.15 2023 0.01 0.02 0.02 0.03 0.10 0.13 0.04 0.10 0.13 0.11 0.31 0.41 0.16 0.46 0.62 0.38 1.09 1.47 0.14 0.40 0.54 0.32 0.92 1.24 0.04 0.11 0.15 2024 0.01 0.02 0.02 0.03 0.10 0.13 0.04 0.10 0.14 0.11 0.31 0.42 0.16 0.46 0.62 0.38 1.10 1.48 0.14 0.40 0.54 0.32 0.92 1.25 0.04 0.11 0.15 2025 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.10 0.14 0.11 0.31 0.42 0.16 0.46 0.62 0.39 1.10 1.49 0.14 0.40 0.54 0.33 0.93 1.26 0.04 0.11 0.16 2026 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.10 0.14 0.11 0.31 0.42 0.16 0.46 0.63 0.39 1.11 1.49 0.14 0.40 0.55 0.33 0.93 1.26 0.04 0.12 0.16 2027 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.10 0.14 0.11 0.31 0.42 0.16 0.47 0.63 0.39 1.11 1.50 0.14 0.41 0.55 0.33 0.94 1.27 0.04 0.12 0.16 Total 0.09 0.25 0.34 0.56 1.61 2.17 0.57 1.62 2.19 1.74 4.97 6.71 2.60 7.41 10.01 6.72 #### #### 2.45 6.98 9.43 5.67 16.15 #### 0.70 2.00 2.70 Avg. 0.00 0.01 0.01 0.02 0.06 0.09 0.02 0.06 0.09 0.07 0.20 0.27 0.10 0.30 0.40 0.27 0.77 1.03 0.10 0.28 0.38 0.23 0.65 0.87 0.03 0.08 0.11 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 23a. 50,001 100,000 100,001 1 Million > 1 Million 3.25 Exhibit E. 23c Yearly Cancer Cases Avoided by System Size Ground Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  IDSE Sensitivity Analysis 1 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.01 0.02 0.04 0.06 0.03 0.10 0.13 0.19 0.55 0.75 0.12 0.34 0.46 0.46 1.30 1.76 0.38 1.08 1.46 2007 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.02 0.03 0.04 0.10 0.14 0.08 0.24 0.32 0.46 1.32 1.78 0.29 0.82 1.11 1.09 3.10 4.19 0.90 2.57 3.47 2008 0.00 0.00 0.01 0.01 0.03 0.04 0.01 0.04 0.05 0.06 0.17 0.23 0.14 0.39 0.53 0.77 2.19 2.96 0.48 1.36 1.84 1.82 5.17 6.98 1.51 4.28 5.79 2009 0.00 0.01 0.01 0.02 0.05 0.06 0.02 0.06 0.08 0.09 0.25 0.33 0.20 0.56 0.76 1.10 3.14 4.25 0.69 1.95 2.64 2.60 7.40 10.01 2.16 6.14 8.30 2010 0.00 0.01 0.01 0.02 0.06 0.08 0.03 0.08 0.10 0.11 0.33 0.44 0.26 0.74 1.00 1.46 4.14 5.60 0.90 2.58 3.48 3.43 9.76 13.19 2.84 8.09 10.94 2011 0.00 0.01 0.01 0.03 0.07 0.10 0.03 0.09 0.13 0.14 0.41 0.55 0.33 0.93 1.26 1.82 5.18 7.00 1.13 3.22 4.35 4.29 12.21 16.50 3.56 10.12 13.68 2012 0.00 0.01 0.02 0.03 0.09 0.12 0.04 0.11 0.15 0.17 0.49 0.66 0.39 1.12 1.52 2.00 5.70 7.70 1.24 3.54 4.78 4.71 13.42 18.13 3.91 11.13 15.03 2013 0.01 0.02 0.02 0.04 0.11 0.14 0.05 0.13 0.18 0.20 0.58 0.78 0.46 1.32 1.78 2.12 6.02 8.14 1.32 3.74 5.06 4.99 14.19 19.18 4.13 11.77 15.90 2014 0.01 0.02 0.02 0.04 0.12 0.16 0.05 0.15 0.21 0.23 0.66 0.90 0.53 1.52 2.05 2.20 6.26 8.45 1.37 3.89 5.25 5.18 14.74 19.92 4.29 12.22 16.51 2015 0.01 0.02 0.03 0.05 0.13 0.18 0.06 0.16 0.22 0.25 0.71 0.96 0.57 1.62 2.19 2.26 6.43 8.69 1.40 4.00 5.40 5.32 15.15 20.48 4.41 12.56 16.98 2016 0.01 0.02 0.03 0.05 0.13 0.18 0.06 0.17 0.23 0.26 0.74 1.00 0.59 1.69 2.28 2.31 6.57 8.88 1.43 4.08 5.52 5.44 15.48 20.92 4.51 12.84 17.35 2017 0.01 0.02 0.03 0.05 0.14 0.19 0.06 0.18 0.24 0.27 0.76 1.03 0.61 1.74 2.35 2.35 6.69 9.03 1.46 4.15 5.61 5.53 15.75 21.28 4.59 13.06 17.64 2018 0.01 0.02 0.03 0.05 0.14 0.19 0.06 0.18 0.24 0.27 0.78 1.05 0.62 1.77 2.40 2.38 6.78 9.16 1.48 4.21 5.69 5.61 15.97 21.58 4.65 13.24 17.89 2019 0.01 0.02 0.03 0.05 0.14 0.20 0.06 0.18 0.25 0.28 0.79 1.07 0.63 1.80 2.44 2.41 6.86 9.27 1.50 4.26 5.76 5.68 16.16 21.84 4.71 13.40 18.10 2020 0.01 0.02 0.03 0.05 0.15 0.20 0.06 0.18 0.25 0.28 0.80 1.08 0.64 1.83 2.47 2.43 6.93 9.36 1.51 4.31 5.82 5.73 16.32 22.06 4.75 13.53 18.29 2021 0.01 0.02 0.03 0.05 0.15 0.20 0.07 0.19 0.25 0.28 0.81 1.10 0.65 1.85 2.50 2.46 6.99 9.44 1.53 4.34 5.87 5.78 16.46 22.25 4.80 13.65 18.45 2022 0.01 0.02 0.03 0.05 0.15 0.20 0.07 0.19 0.26 0.29 0.82 1.11 0.66 1.87 2.53 2.47 7.04 9.52 1.54 4.38 5.91 5.83 16.59 22.42 4.83 13.75 18.59 2023 0.01 0.02 0.03 0.05 0.15 0.20 0.07 0.19 0.26 0.29 0.83 1.12 0.66 1.89 2.55 2.49 7.09 9.58 1.55 4.41 5.95 5.87 16.70 22.57 4.86 13.84 18.71 2024 0.01 0.02 0.03 0.05 0.15 0.21 0.07 0.19 0.26 0.29 0.83 1.12 0.67 1.90 2.57 2.51 7.13 9.64 1.56 4.43 5.99 5.90 16.80 22.70 4.89 13.93 18.82 2025 0.01 0.02 0.03 0.05 0.15 0.21 0.07 0.19 0.26 0.29 0.84 1.13 0.67 1.91 2.58 2.52 7.17 9.69 1.57 4.45 6.02 5.93 16.89 22.82 4.92 14.00 18.92 2026 0.01 0.02 0.03 0.05 0.15 0.21 0.07 0.19 0.26 0.30 0.84 1.14 0.68 1.92 2.60 2.53 7.20 9.73 1.57 4.48 6.05 5.96 16.97 22.93 4.94 14.07 19.01 2027 0.01 0.02 0.03 0.05 0.15 0.21 0.07 0.20 0.26 0.30 0.85 1.14 0.68 1.93 2.61 2.54 7.23 9.78 1.58 4.50 6.08 5.99 17.04 23.03 4.96 14.13 19.09 Total 0.13 0.37 0.49 0.86 2.45 3.31 1.09 3.09 4.18 4.71 13.42 #### 10.77 #### #### #### 124.62 ##### #### #### 104.66 ##### ##### ##### #### ##### #####

Avg. 0.01 0.01 0.02 0.03 0.10 0.13 0.04 0.12 0.17 0.19 0.54 0.73 0.43 1.23 1.66 1.75 4.98 6.74 1.09 3.10 4.19 4.13 11.74 15.87 3.42 9.74 13.16 Avg.  All Size Categories Note:

Source: TTHM  IDSE Sensitivity Analysis 1 42.65 Exhibit E. 23d Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 All Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 23a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.04 0.06 0.08 0.24 0.32 0.23 0.66 0.89 1.44 4.08 5.52 0.96 2.73 3.69 3.77 10.74 14.52 3.28 9.35 12.63 2007 0.00 0.01 0.01 0.02 0.06 0.08 0.03 0.10 0.13 0.20 0.57 0.77 0.55 1.56 2.11 3.42 9.72 13.14 2.28 6.50 8.78 8.98 25.57 34.56 7.82 22.25 30.07 2008 0.00 0.01 0.02 0.03 0.09 0.13 0.06 0.16 0.22 0.33 0.95 1.28 0.92 2.60 3.52 5.69 16.20 21.89 3.80 10.82 14.63 14.97 42.61 57.59 13.03 37.08 50.11 2009 0.01 0.02 0.03 0.05 0.14 0.18 0.08 0.24 0.32 0.48 1.36 1.83 1.31 3.73 5.04 8.16 23.22 31.38 5.45 15.51 20.96 21.46 61.07 82.52 18.67 53.14 71.81 2010 0.01 0.02 0.03 0.06 0.18 0.24 0.11 0.31 0.42 0.63 1.79 2.42 1.73 4.92 6.65 10.75 30.61 41.36 7.18 20.45 27.63 28.29 80.51 108.79 24.61 70.05 94.66 2011 0.01 0.03 0.04 0.08 0.22 0.30 0.14 0.39 0.53 0.79 2.24 3.02 2.16 6.15 8.32 13.45 38.28 51.73 8.98 25.57 34.56 35.37 100.68 136.05 30.78 87.60 118.38 2012 0.01 0.04 0.05 0.09 0.27 0.37 0.16 0.47 0.63 0.95 2.70 3.65 2.61 7.42 10.03 14.78 42.08 56.86 9.88 28.11 37.99 38.88 110.67 149.55 33.83 96.30 130.13 2013 0.02 0.04 0.06 0.11 0.32 0.43 0.19 0.55 0.75 1.11 3.17 4.28 3.06 8.72 11.78 15.63 44.50 60.13 10.44 29.73 40.17 41.12 117.03 158.15 35.78 101.84 137.62 2014 0.02 0.05 0.07 0.13 0.37 0.49 0.22 0.63 0.86 1.28 3.65 4.93 3.53 10.03 13.56 16.24 46.22 62.45 10.85 30.88 41.72 42.71 121.55 164.26 37.16 105.77 142.93 2015 0.02 0.05 0.07 0.14 0.39 0.53 0.24 0.68 0.92 1.37 3.90 5.27 3.76 10.72 14.48 16.70 47.52 64.21 11.15 31.74 42.90 43.91 124.98 168.89 38.21 108.75 146.96 2016 0.02 0.06 0.08 0.14 0.41 0.55 0.25 0.71 0.95 1.43 4.06 5.49 3.92 11.16 15.08 17.06 48.54 65.60 11.39 32.43 43.83 44.86 127.68 172.54 39.04 111.10 150.14 2017 0.02 0.06 0.08 0.15 0.42 0.57 0.26 0.73 0.98 1.47 4.18 5.65 4.04 11.49 15.52 17.35 49.38 66.73 11.59 32.99 44.58 45.63 129.88 175.52 39.71 113.02 152.73 2018 0.02 0.06 0.08 0.15 0.43 0.58 0.26 0.74 1.00 1.50 4.27 5.77 4.12 11.74 15.86 17.60 50.08 67.67 11.75 33.46 45.21 46.28 131.72 178.00 40.27 114.61 154.88 2019 0.02 0.06 0.08 0.15 0.43 0.59 0.27 0.76 1.02 1.53 4.34 5.87 4.20 11.94 16.14 17.80 50.67 68.47 11.89 33.85 45.75 46.83 133.27 180.10 40.74 115.97 156.71 2020 0.02 0.06 0.08 0.15 0.44 0.60 0.27 0.77 1.04 1.55 4.40 5.95 4.25 12.11 16.36 17.98 51.18 69.16 12.01 34.19 46.20 47.30 134.61 181.91 41.15 117.13 158.29 2021 0.02 0.06 0.08 0.16 0.45 0.60 0.27 0.77 1.05 1.57 4.46 6.02 4.30 12.25 16.55 18.14 51.62 69.76 12.12 34.49 46.61 47.71 135.78 183.49 41.51 118.15 159.66 2022 0.02 0.06 0.08 0.16 0.45 0.61 0.27 0.78 1.06 1.58 4.50 6.08 4.35 12.37 16.72 18.28 52.01 70.29 12.21 34.75 46.96 48.07 136.81 184.88 41.83 119.04 160.87 2023 0.02 0.06 0.08 0.16 0.45 0.61 0.28 0.79 1.07 1.59 4.54 6.13 4.38 12.48 16.86 18.40 52.36 70.76 12.29 34.98 47.27 48.39 137.72 186.11 42.10 119.84 161.94 2024 0.02 0.06 0.08 0.16 0.46 0.62 0.28 0.79 1.07 1.61 4.57 6.18 4.42 12.57 16.98 18.51 52.67 71.18 12.36 35.19 47.55 48.68 138.54 187.21 42.35 120.55 162.90 2025 0.02 0.06 0.09 0.16 0.46 0.62 0.28 0.80 1.08 1.62 4.60 6.22 4.44 12.65 17.10 18.60 52.95 71.56 12.43 35.38 47.81 48.93 139.28 188.21 42.58 121.19 163.77 2026 0.02 0.06 0.09 0.16 0.46 0.63 0.28 0.80 1.09 1.63 4.63 6.25 4.47 12.72 17.19 18.69 53.21 71.90 12.49 35.55 48.03 49.17 139.94 189.11 42.78 121.77 164.56 2027 0.02 0.06 0.09 0.16 0.47 0.63 0.28 0.81 1.09 1.63 4.65 6.29 4.49 12.79 17.28 18.78 53.44 72.21 12.54 35.70 48.24 49.38 140.55 189.94 42.97 122.30 165.27 Total 0.36 1.01 1.37 2.59 7.38 9.97 4.51 #### #### #### #### #### #### ##### ##### ##### ##### ####### ##### ##### ##### ##### ####### ####### ##### ####### #######

Avg. 0.01 0.04 0.05 0.10 0.30 0.40 0.18 0.51 0.69 1.04 2.95 3.99 2.85 8.11 10.96 12.94 36.82 49.76 8.64 24.60 33.24 34.03 96.85 130.88 29.61 84.27 113.88 Avg.  All Size Categories Note:

Source: Exhibit E. 23e Yearly Cancer Cases Avoided by System Size Surface Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  IDSE Sensitivity Analysis 1 Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 23a. Detail may not add to totals due to independent rounding. 50,001 100,000 100,001 1 Million > 1 Million 343.85 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.01 0.01 0.02 0.05 0.06 0.02 0.05 0.06 0.05 0.14 0.19 0.07 0.21 0.28 0.26 0.74 1.00 0.09 0.27 0.37 0.22 0.63 0.85 0.03 0.08 0.10 2007 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.33 0.45 0.18 0.50 0.67 0.62 1.76 2.38 0.23 0.64 0.87 0.52 1.49 2.01 0.06 0.18 0.25 2008 0.01 0.03 0.04 0.06 0.18 0.24 0.06 0.18 0.25 0.20 0.56 0.75 0.29 0.83 1.12 1.03 2.94 3.97 0.38 1.07 1.45 0.87 2.48 3.35 0.11 0.31 0.41 2009 0.01 0.04 0.05 0.09 0.26 0.35 0.09 0.26 0.35 0.28 0.80 1.08 0.42 1.19 1.61 1.48 4.21 5.69 0.54 1.54 2.08 1.25 3.55 4.80 0.15 0.44 0.59 2010 0.02 0.05 0.07 0.12 0.34 0.46 0.12 0.34 0.46 0.37 1.05 1.42 0.55 1.57 2.12 1.95 5.55 7.51 0.71 2.03 2.74 1.65 4.69 6.33 0.20 0.58 0.78 2011 0.02 0.07 0.09 0.15 0.43 0.57 0.15 0.43 0.58 0.46 1.32 1.78 0.69 1.96 2.65 2.44 6.95 9.39 0.89 2.53 3.42 2.06 5.86 7.92 0.25 0.72 0.98 2012 0.03 0.08 0.11 0.18 0.51 0.69 0.18 0.52 0.70 0.56 1.59 2.14 0.83 2.37 3.20 2.68 7.63 10.32 0.98 2.78 3.76 2.26 6.44 8.71 0.28 0.80 1.08 2013 0.03 0.09 0.13 0.21 0.60 0.81 0.21 0.61 0.82 0.65 1.86 2.52 0.98 2.78 3.76 2.84 8.07 10.91 1.03 2.94 3.98 2.39 6.81 9.21 0.30 0.84 1.14 2014 0.04 0.11 0.15 0.24 0.69 0.94 0.25 0.70 0.95 0.75 2.14 2.90 1.12 3.20 4.32 2.95 8.39 11.33 1.07 3.06 4.13 2.49 7.08 9.56 0.31 0.87 1.18 2015 0.04 0.11 0.16 0.26 0.74 1.00 0.26 0.75 1.01 0.80 2.29 3.09 1.20 3.42 4.62 3.03 8.62 11.65 1.10 3.14 4.25 2.56 7.28 9.83 0.32 0.90 1.22 2016 0.04 0.12 0.16 0.27 0.77 1.04 0.27 0.78 1.05 0.84 2.39 3.22 1.25 3.56 4.81 3.09 8.81 11.90 1.13 3.21 4.34 2.61 7.43 10.04 0.32 0.92 1.24 2017 0.04 0.12 0.17 0.28 0.79 1.07 0.28 0.80 1.08 0.86 2.46 3.32 1.29 3.66 4.95 3.15 8.96 12.11 1.15 3.27 4.41 2.66 7.56 10.22 0.33 0.93 1.26 2018 0.04 0.13 0.17 0.29 0.81 1.10 0.29 0.82 1.11 0.88 2.51 3.39 1.32 3.74 5.06 3.19 9.09 12.28 1.16 3.31 4.48 2.69 7.67 10.36 0.33 0.95 1.28 2019 0.04 0.13 0.17 0.29 0.83 1.12 0.29 0.83 1.13 0.90 2.55 3.45 1.34 3.81 5.15 3.23 9.19 12.42 1.18 3.35 4.53 2.73 7.76 10.48 0.34 0.96 1.30 2020 0.05 0.13 0.18 0.29 0.84 1.13 0.30 0.85 1.14 0.91 2.59 3.50 1.36 3.86 5.22 3.26 9.29 12.55 1.19 3.39 4.58 2.75 7.84 10.59 0.34 0.97 1.31 2021 0.05 0.13 0.18 0.30 0.85 1.14 0.30 0.86 1.16 0.92 2.62 3.54 1.37 3.91 5.28 3.29 9.37 12.66 1.20 3.42 4.62 2.78 7.90 10.68 0.34 0.98 1.32 2022 0.05 0.13 0.18 0.30 0.86 1.16 0.30 0.86 1.17 0.93 2.64 3.57 1.39 3.95 5.33 3.32 9.44 12.75 1.21 3.44 4.65 2.80 7.96 10.76 0.35 0.98 1.33 2023 0.05 0.13 0.18 0.30 0.86 1.17 0.31 0.87 1.18 0.94 2.67 3.60 1.40 3.98 5.38 3.34 9.50 12.84 1.22 3.46 4.68 2.82 8.02 10.83 0.35 0.99 1.34 2024 0.05 0.13 0.18 0.31 0.87 1.17 0.31 0.88 1.19 0.94 2.69 3.63 1.41 4.01 5.42 3.36 9.56 12.92 1.22 3.48 4.71 2.83 8.06 10.90 0.35 1.00 1.35 2025 0.05 0.14 0.18 0.31 0.87 1.18 0.31 0.88 1.19 0.95 2.70 3.65 1.42 4.03 5.45 3.38 9.61 12.98 1.23 3.50 4.73 2.85 8.11 10.96 0.35 1.00 1.35 2026 0.05 0.14 0.18 0.31 0.88 1.19 0.31 0.89 1.20 0.96 2.72 3.68 1.43 4.06 5.48 3.39 9.65 13.05 1.24 3.52 4.76 2.86 8.15 11.01 0.35 1.01 1.36 2027 0.05 0.14 0.19 0.31 0.88 1.19 0.31 0.89 1.21 0.96 2.73 3.69 1.43 4.08 5.51 3.41 9.70 13.10 1.24 3.54 4.78 2.87 8.18 11.06 0.36 1.01 1.37 Total 0.76 2.17 2.94 4.93 #### #### 4.98 #### #### #### #### #### #### #### #### #### 167.04 ##### 21.40 #### #### #### 140.94 ##### 6.12 #### ####

Avg. 0.03 0.09 0.12 0.20 0.56 0.76 0.20 0.57 0.77 0.61 1.73 2.34 0.91 2.59 3.50 2.35 6.68 9.03 0.86 2.44 3.29 1.98 5.64 7.62 0.24 0.70 0.94 Avg.  All Size Categories Note:

Source: TTHM  IDSE Sensitivity Analysis 1 28.36 Exhibit E. 23f Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 Ground Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 23a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.01 0.01 0.02 0.07 0.09 0.03 0.09 0.12 0.13 0.38 0.51 0.30 0.87 1.17 1.70 4.83 6.52 1.05 3.00 4.05 3.99 11.37 15.36 3.31 9.43 12.74 2007 0.01 0.02 0.03 0.06 0.16 0.22 0.07 0.21 0.28 0.32 0.90 1.22 0.72 2.06 2.79 4.04 11.49 15.52 2.51 7.14 9.65 9.51 27.06 36.57 7.88 22.43 30.32 2008 0.01 0.04 0.06 0.10 0.27 0.37 0.12 0.35 0.47 0.53 1.50 2.03 1.21 3.44 4.64 6.73 19.14 25.87 4.18 11.90 16.08 15.84 45.09 60.94 13.14 37.39 50.52 2009 0.02 0.06 0.08 0.14 0.39 0.53 0.17 0.50 0.67 0.76 2.16 2.91 1.73 4.92 6.65 9.64 27.43 37.07 5.99 17.05 23.04 22.71 64.62 87.33 18.82 53.58 72.40 2010 0.03 0.08 0.10 0.18 0.52 0.70 0.23 0.66 0.89 1.00 2.84 3.84 2.28 6.49 8.77 12.71 36.16 48.87 7.90 22.47 30.37 29.93 85.19 115.12 24.82 70.63 95.45 2011 0.03 0.10 0.13 0.23 0.65 0.88 0.29 0.82 1.11 1.25 3.55 4.80 2.85 8.12 10.97 15.89 45.22 61.11 9.87 28.10 37.98 37.43 106.54 143.97 31.03 88.33 119.36 2012 0.04 0.12 0.16 0.28 0.78 1.06 0.35 0.99 1.34 1.51 4.29 5.79 3.44 9.79 13.23 17.47 49.71 67.18 10.85 30.89 41.75 41.15 117.11 158.26 34.11 97.10 131.21 2013 0.05 0.14 0.19 0.32 0.92 1.24 0.41 1.16 1.57 1.77 5.03 6.80 4.04 11.50 15.54 18.47 52.57 71.04 11.48 32.67 44.15 43.51 123.85 167.36 36.08 102.68 138.75 2014 0.06 0.16 0.21 0.37 1.06 1.43 0.47 1.34 1.81 2.04 5.79 7.83 4.65 13.24 17.89 19.18 54.60 73.79 11.92 33.93 45.85 45.19 128.63 173.83 37.47 106.64 144.11 2015 0.06 0.17 0.23 0.40 1.13 1.53 0.50 1.43 1.93 2.17 6.19 8.36 4.97 14.13 19.10 19.72 56.14 75.86 12.26 34.89 47.15 46.47 132.25 178.72 38.53 109.65 148.17 2016 0.06 0.18 0.24 0.41 1.18 1.59 0.52 1.49 2.01 2.26 6.45 8.71 5.17 14.72 19.90 20.15 57.35 77.50 12.52 35.64 48.17 47.47 135.11 182.59 39.36 112.02 151.38 2017 0.06 0.18 0.24 0.43 1.21 1.64 0.54 1.53 2.07 2.33 6.63 8.96 5.32 15.15 20.48 20.50 58.34 78.84 12.74 36.26 49.00 48.29 137.44 185.73 40.04 113.95 153.99 2018 0.06 0.18 0.25 0.44 1.24 1.67 0.55 1.56 2.11 2.38 6.78 9.16 5.44 15.48 20.92 20.79 59.17 79.95 12.92 36.77 49.69 48.97 139.38 188.36 40.60 115.56 156.16 2019 0.07 0.19 0.25 0.44 1.26 1.70 0.56 1.59 2.15 2.42 6.90 9.32 5.53 15.75 21.28 21.03 59.86 80.90 13.07 37.20 50.28 49.55 141.03 190.58 41.08 116.93 158.01 2020 0.07 0.19 0.26 0.45 1.28 1.73 0.57 1.61 2.18 2.46 6.99 9.45 5.61 15.97 21.58 21.24 60.47 81.71 13.20 37.58 50.78 50.05 142.45 192.50 41.49 118.10 159.60 2021 0.07 0.19 0.26 0.45 1.29 1.75 0.57 1.63 2.20 2.49 7.07 9.56 5.68 16.16 21.83 21.43 60.99 82.42 13.32 37.90 51.22 50.48 143.68 194.17 41.85 119.12 160.98 2022 0.07 0.19 0.26 0.46 1.31 1.76 0.58 1.65 2.23 2.51 7.14 9.65 5.73 16.32 22.05 21.59 61.45 83.04 13.42 38.19 51.61 50.87 144.77 195.64 42.17 120.03 162.20 2023 0.07 0.20 0.27 0.46 1.32 1.78 0.58 1.66 2.24 2.53 7.20 9.74 5.78 16.46 22.24 21.74 61.86 83.60 13.51 38.45 51.95 51.21 145.74 196.94 42.45 120.83 163.28 2024 0.07 0.20 0.27 0.47 1.33 1.79 0.59 1.67 2.26 2.55 7.26 9.81 5.82 16.58 22.40 21.86 62.23 84.09 13.59 38.67 52.26 51.51 146.60 198.11 42.71 121.55 164.25 2025 0.07 0.20 0.27 0.47 1.33 1.80 0.59 1.68 2.28 2.57 7.31 9.87 5.86 16.69 22.55 21.98 62.56 84.54 13.66 38.88 52.54 51.78 147.38 199.17 42.93 122.19 165.12 2026 0.07 0.20 0.27 0.47 1.34 1.81 0.60 1.69 2.29 2.58 7.35 9.93 5.90 16.78 22.68 22.09 62.86 84.95 13.73 39.07 52.79 52.03 148.09 200.12 43.14 122.78 165.92 2027 0.07 0.20 0.27 0.47 1.35 1.82 0.60 1.70 2.30 2.60 7.39 9.98 5.93 16.87 22.80 22.18 63.13 85.32 13.79 39.24 53.02 52.26 148.73 200.99 43.33 123.31 166.64 Total 1.12 3.19 4.31 7.52 #### #### 9.49 #### #### #### ##### ##### #### ##### ##### ##### ####### ####### ##### ##### ##### ##### ####### ####### ##### ####### #######

Avg. 0.04 0.13 0.17 0.30 0.86 1.16 0.38 1.08 1.46 1.65 4.68 6.33 3.76 10.70 14.46 15.28 43.50 58.79 9.50 27.04 36.53 36.01 102.49 138.49 29.85 84.97 114.82 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 23a. 50,001 100,000 100,001 1 Million > 1 Million 372.21 Exhibit E. 23g Yearly Cancer Cases Avoided by System Size All Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  IDSE Sensitivity Analysis 1 Economic Analysis for the Stage 2 DBPR July 2003 Section E. 6.8 Projection of Cases  Stage 2 IDSE Sensitivity Analysis 2 TTHM as Indicator Economic Analysis for the Stage 2 DBPR July 2003 Annual Existing Cancer Cases  Pre Stage 2 DBPR Annual Existing Cancer Cases  Post Stage 2 Annual Reductions in Bladder Cancer Cases Attributable to the Stage 2 DBPR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.11 0.84 0.95 < 100 0.10 0.81 0.91 < 100 0.02 0.03 0.04 101 500 0.82 5.41 6.23 101 500 0.69 5.25 5.94 101 500 0.13 0.16 0.29 501 1,000 1.43 5.47 6.90 501 1,000 1.20 5.31 6.51 501 1,000 0.22 0.16 0.39 1,001 3,300 8.20 16.74 24.94 1,001 3,300 6.91 16.24 23.15 1,001 3,300 1.28 0.50 1.79 3,301 10,000 22.53 24.98 47.51 3,301 10,000 19.01 24.23 43.24 3,301 10,000 3.53 0.75 4.28 10,001 50,000 93.44 51.52 144.96 10,001 50,000 78.82 49.58 128.40 10,001 50,000 14.62 1.94 16.56 50,001 100,000 62.43 18.78 81.21 50,001 100,000 52.66 18.08 70.73 50,001 100,000 9.77 0.71 10.48 100,001 1 Million 245.77 43.47 289.24 100,001 1 Million 207.32 41.83 249.15 100,001 1 Million 38.46 1.64 40.09 > 1 Million 213.86 5.37 219.23 > 1 Million 180.39 5.17 185.57 > 1 Million 33.46 0.20 33.66 Total 648.59 172.59 821.17 Total 547.10 166.49 713.59 Total 101.48 6.09 107.58 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.98 7.32 8.31 < 100 0.83 7.10 7.93 < 100 0.15 0.22 0.37 101 500 7.16 47.25 54.41 101 500 6.04 45.83 51.87 101 500 1.12 1.42 2.54 501 1,000 12.44 47.76 60.20 501 1,000 10.49 46.33 56.82 501 1,000 1.95 1.43 3.38 1,001 3,300 71.53 146.09 217.62 1,001 3,300 60.34 141.70 202.04 1,001 3,300 11.19 4.39 15.58 3,301 10,000 196.66 218.00 414.66 3,301 10,000 165.89 211.45 377.34 3,301 10,000 30.77 6.54 37.32 10,001 50,000 815.50 449.59 1,265.09 10,001 50,000 687.90 432.66 1,120.56 10,001 50,000 127.60 16.93 144.53 50,001 100,000 544.81 163.93 708.74 50,001 100,000 459.56 157.75 617.32 50,001 100,000 85.25 6.17 91.42 100,001 1 Million 2,144.92 379.36 2,524.28 100,001 1 Million 1,809.30 365.08 2,174.38 100,001 1 Million 335.62 14.29 349.90 > 1 Million 1,866.38 46.90 1,913.28 > 1 Million 1,574.35 45.13 1,619.48 > 1 Million 292.03 1.77 293.80 Total 5,660.38 1,506.20 7,166.58 Total 4,774.70 1,453.04 6,227.74 Total 885.68 53.16 938.84 Source: Derived from figures presented in Appendix E. Annual Existing Cases  Post Stage 2 System Size ( Population Served) Annual Existing Cases  Post Stage 2 System Size ( Population Served)

System Size ( Population Served) Annual Cases Reduced by Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 Exhibit E. 24a Expanded Cancer Case Inputs for Benefits Quantification ( TTHM  IDSE Sensitivity Analysis 2)

System Size ( Population Served) Annual Cases Reduced by Stage 2 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.01 0.01 0.02 0.04 0.06 0.04 0.12 0.16 0.26 0.75 1.01 0.18 0.50 0.67 0.69 1.96 2.65 0.60 1.71 2.31 2007 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.02 0.04 0.10 0.14 0.10 0.29 0.39 0.62 1.78 2.40 0.42 1.19 1.60 1.64 4.67 6.31 1.43 4.06 5.49 2008 0.00 0.00 0.00 0.01 0.02 0.02 0.01 0.03 0.04 0.06 0.17 0.23 0.17 0.48 0.64 1.04 2.96 4.00 0.69 1.98 2.67 2.73 7.78 10.51 2.38 6.77 9.15 2009 0.00 0.00 0.00 0.01 0.02 0.03 0.02 0.04 0.06 0.09 0.25 0.34 0.24 0.68 0.92 1.49 4.24 5.73 1.00 2.83 3.83 3.92 11.15 15.07 3.41 9.70 13.11 2010 0.00 0.00 0.01 0.01 0.03 0.04 0.02 0.06 0.08 0.11 0.33 0.44 0.32 0.90 1.21 1.96 5.59 7.55 1.31 3.73 5.05 5.16 14.70 19.86 4.49 12.79 17.28 2011 0.00 0.01 0.01 0.01 0.04 0.06 0.02 0.07 0.10 0.14 0.41 0.55 0.39 1.12 1.52 2.46 6.99 9.44 1.64 4.67 6.31 6.46 18.38 24.84 5.62 16.00 21.62 2012 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.12 0.17 0.49 0.67 0.48 1.36 1.83 2.70 7.68 10.38 1.80 5.13 6.94 7.10 20.21 27.31 6.18 17.58 23.76 2013 0.00 0.01 0.01 0.02 0.06 0.08 0.04 0.10 0.14 0.20 0.58 0.78 0.56 1.59 2.15 2.85 8.12 10.98 1.91 5.43 7.33 7.51 21.37 28.88 6.53 18.59 25.13 2014 0.00 0.01 0.01 0.02 0.07 0.09 0.04 0.12 0.16 0.23 0.67 0.90 0.64 1.83 2.48 2.96 8.44 11.40 1.98 5.64 7.62 7.80 22.19 29.99 6.79 19.31 26.10 2015 0.00 0.01 0.01 0.03 0.07 0.10 0.04 0.12 0.17 0.25 0.71 0.96 0.69 1.96 2.64 3.05 8.68 11.72 2.04 5.80 7.83 8.02 22.82 30.84 6.98 19.86 26.83 2016 0.00 0.01 0.01 0.03 0.07 0.10 0.05 0.13 0.17 0.26 0.74 1.00 0.72 2.04 2.75 3.11 8.86 11.98 2.08 5.92 8.00 8.19 23.31 31.50 7.13 20.29 27.41 2017 0.00 0.01 0.01 0.03 0.08 0.10 0.05 0.13 0.18 0.27 0.76 1.03 0.74 2.10 2.83 3.17 9.02 12.18 2.12 6.02 8.14 8.33 23.72 32.05 7.25 20.64 27.89 2018 0.00 0.01 0.01 0.03 0.08 0.11 0.05 0.14 0.18 0.27 0.78 1.05 0.75 2.14 2.90 3.21 9.14 12.36 2.15 6.11 8.26 8.45 24.05 32.50 7.35 20.93 28.28 2019 0.00 0.01 0.01 0.03 0.08 0.11 0.05 0.14 0.19 0.28 0.79 1.07 0.77 2.18 2.95 3.25 9.25 12.50 2.17 6.18 8.35 8.55 24.33 32.88 7.44 21.17 28.61 2020 0.00 0.01 0.01 0.03 0.08 0.11 0.05 0.14 0.19 0.28 0.80 1.09 0.78 2.21 2.99 3.28 9.34 12.63 2.19 6.24 8.44 8.64 24.58 33.21 7.51 21.39 28.90 2021 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.14 0.19 0.29 0.81 1.10 0.79 2.24 3.02 3.31 9.43 12.74 2.21 6.30 8.51 8.71 24.79 33.50 7.58 21.57 29.15 2022 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.14 0.19 0.29 0.82 1.11 0.79 2.26 3.05 3.34 9.50 12.83 2.23 6.34 8.57 8.78 24.98 33.76 7.64 21.74 29.37 2023 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.14 0.19 0.29 0.83 1.12 0.80 2.28 3.08 3.36 9.56 12.92 2.24 6.39 8.63 8.84 25.15 33.98 7.69 21.88 29.57 2024 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.15 0.20 0.29 0.83 1.13 0.81 2.29 3.10 3.38 9.62 13.00 2.26 6.43 8.68 8.89 25.30 34.18 7.73 22.01 29.74 2025 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.15 0.20 0.30 0.84 1.14 0.81 2.31 3.12 3.40 9.67 13.07 2.27 6.46 8.73 8.94 25.43 34.37 7.77 22.13 29.90 2026 0.00 0.01 0.02 0.03 0.08 0.11 0.05 0.15 0.20 0.30 0.85 1.14 0.82 2.32 3.14 3.41 9.72 13.13 2.28 6.49 8.77 8.98 25.55 34.53 7.81 22.23 30.05 2027 0.00 0.01 0.02 0.03 0.09 0.11 0.05 0.15 0.20 0.30 0.85 1.15 0.82 2.34 3.16 3.43 9.76 13.19 2.29 6.52 8.81 9.02 25.66 34.68 7.85 22.33 30.18 Total 0.07 0.19 0.25 0.47 1.35 1.82 0.82 2.34 3.16 4.73 13.47 18.20 13.01 37.03 50.04 #### ##### ##### #### 112.29 ##### 155.33 ##### ##### ##### ##### #####

Avg. 0.00 0.01 0.01 0.02 0.05 0.07 0.03 0.09 0.13 0.19 0.54 0.73 0.52 1.48 2.00 2.36 6.72 9.09 1.58 4.49 6.07 6.21 17.68 23.90 5.41 15.39 20.79 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 24a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 TTHM  IDSE Sensitivity Analysis 2 62.78 Exhibit E. 24b Yearly Cancer Cases Avoided by System Size 50,001 100,000 100,001 1 Million > 1 Million 101 500 Surface Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.01 0.01 0.02 0.02 0.01 0.03 0.03 0.03 0.10 0.13 0.01 0.04 0.05 0.03 0.08 0.11 0.00 0.01 0.01 2007 0.00 0.00 0.00 0.00 0.01 0.02 0.00 0.01 0.02 0.01 0.04 0.05 0.02 0.06 0.08 0.08 0.24 0.32 0.03 0.09 0.12 0.07 0.20 0.27 0.01 0.02 0.03 2008 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.02 0.03 0.02 0.07 0.09 0.04 0.10 0.14 0.14 0.39 0.53 0.05 0.14 0.19 0.12 0.33 0.45 0.01 0.04 0.06 2009 0.00 0.00 0.01 0.01 0.03 0.04 0.01 0.03 0.04 0.03 0.10 0.13 0.05 0.14 0.20 0.20 0.56 0.76 0.07 0.21 0.28 0.17 0.47 0.64 0.02 0.06 0.08 2010 0.00 0.01 0.01 0.01 0.04 0.06 0.01 0.04 0.06 0.04 0.13 0.17 0.07 0.19 0.26 0.26 0.74 1.00 0.09 0.27 0.37 0.22 0.63 0.85 0.03 0.08 0.10 2011 0.00 0.01 0.01 0.02 0.05 0.07 0.02 0.05 0.07 0.06 0.16 0.22 0.08 0.24 0.32 0.33 0.93 1.25 0.12 0.34 0.46 0.27 0.78 1.06 0.03 0.10 0.13 2012 0.00 0.01 0.01 0.02 0.06 0.08 0.02 0.06 0.09 0.07 0.19 0.26 0.10 0.29 0.39 0.36 1.02 1.38 0.13 0.37 0.50 0.30 0.86 1.16 0.04 0.11 0.14 2013 0.00 0.01 0.02 0.03 0.07 0.10 0.03 0.07 0.10 0.08 0.23 0.31 0.12 0.34 0.46 0.38 1.08 1.46 0.14 0.39 0.53 0.32 0.91 1.23 0.04 0.11 0.15 2014 0.00 0.01 0.02 0.03 0.08 0.11 0.03 0.09 0.12 0.09 0.26 0.35 0.14 0.39 0.53 0.39 1.12 1.51 0.14 0.41 0.55 0.33 0.94 1.28 0.04 0.12 0.16 2015 0.00 0.01 0.02 0.03 0.09 0.12 0.03 0.09 0.12 0.10 0.28 0.38 0.15 0.42 0.56 0.40 1.15 1.56 0.15 0.42 0.57 0.34 0.97 1.31 0.04 0.12 0.16 2016 0.01 0.01 0.02 0.03 0.09 0.13 0.03 0.09 0.13 0.10 0.29 0.39 0.15 0.43 0.59 0.41 1.18 1.59 0.15 0.43 0.58 0.35 0.99 1.34 0.04 0.12 0.17 2017 0.01 0.01 0.02 0.03 0.10 0.13 0.03 0.10 0.13 0.11 0.30 0.40 0.16 0.45 0.60 0.42 1.20 1.62 0.15 0.44 0.59 0.35 1.01 1.36 0.04 0.12 0.17 2018 0.01 0.02 0.02 0.03 0.10 0.13 0.04 0.10 0.13 0.11 0.31 0.41 0.16 0.46 0.62 0.43 1.21 1.64 0.16 0.44 0.60 0.36 1.02 1.38 0.04 0.13 0.17 2019 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.10 0.14 0.11 0.31 0.42 0.16 0.46 0.63 0.43 1.23 1.66 0.16 0.45 0.60 0.36 1.04 1.40 0.04 0.13 0.17 2020 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.10 0.14 0.11 0.32 0.43 0.17 0.47 0.64 0.44 1.24 1.68 0.16 0.45 0.61 0.37 1.05 1.41 0.05 0.13 0.17 2021 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.10 0.14 0.11 0.32 0.43 0.17 0.48 0.64 0.44 1.25 1.69 0.16 0.46 0.62 0.37 1.06 1.43 0.05 0.13 0.18 2022 0.01 0.02 0.02 0.04 0.10 0.14 0.04 0.11 0.14 0.11 0.32 0.44 0.17 0.48 0.65 0.44 1.26 1.70 0.16 0.46 0.62 0.37 1.06 1.44 0.05 0.13 0.18 2023 0.01 0.02 0.02 0.04 0.11 0.14 0.04 0.11 0.14 0.11 0.32 0.44 0.17 0.48 0.65 0.45 1.27 1.71 0.16 0.46 0.63 0.38 1.07 1.45 0.05 0.13 0.18 2024 0.01 0.02 0.02 0.04 0.11 0.14 0.04 0.11 0.14 0.11 0.33 0.44 0.17 0.49 0.66 0.45 1.28 1.72 0.16 0.47 0.63 0.38 1.08 1.46 0.05 0.13 0.18 2025 0.01 0.02 0.02 0.04 0.11 0.14 0.04 0.11 0.15 0.12 0.33 0.44 0.17 0.49 0.66 0.45 1.28 1.73 0.16 0.47 0.63 0.38 1.08 1.46 0.05 0.13 0.18 2026 0.01 0.02 0.02 0.04 0.11 0.14 0.04 0.11 0.15 0.12 0.33 0.45 0.17 0.49 0.67 0.45 1.29 1.74 0.17 0.47 0.64 0.38 1.09 1.47 0.05 0.13 0.18 2027 0.01 0.02 0.02 0.04 0.11 0.15 0.04 0.11 0.15 0.12 0.33 0.45 0.17 0.50 0.67 0.45 1.29 1.75 0.17 0.47 0.64 0.38 1.09 1.48 0.05 0.14 0.18 Total 0.09 0.26 0.36 0.60 1.71 2.31 0.61 1.73 2.33 1.85 5.28 7.13 2.77 7.88 #### 7.84 #### #### 2.86 8.13 #### 6.61 18.82 #### 0.82 2.33 3.14 Avg. 0.00 0.01 0.01 0.02 0.07 0.09 0.02 0.07 0.09 0.07 0.21 0.29 0.11 0.32 0.43 0.31 0.89 1.21 0.11 0.33 0.44 0.26 0.75 1.02 0.03 0.09 0.13 Avg.  All Size Categories Note:

Source: Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 24a. 50,001 100,000 100,001 1 Million > 1 Million 3.70 Exhibit E. 24c Yearly Cancer Cases Avoided by System Size Ground Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  IDSE Sensitivity Analysis 2 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total Fatal Non Fatal Total 2003

2004

2005

2006 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.01 0.02 0.02 0.06 0.08 0.05 0.15 0.20 0.30 0.84 1.14 0.19 0.53 0.72 0.72 2.05 2.76 0.60 1.72 2.32 2007 0.00 0.00 0.00 0.01 0.02 0.03 0.01 0.03 0.04 0.05 0.14 0.20 0.12 0.35 0.47 0.71 2.01 2.72 0.45 1.27 1.72 1.71 4.87 6.58 1.44 4.09 5.52 2008 0.00 0.01 0.01 0.01 0.04 0.05 0.02 0.05 0.07 0.08 0.24 0.33 0.20 0.58 0.78 1.18 3.35 4.53 0.74 2.12 2.86 2.85 8.11 10.96 2.39 6.81 9.20 2009 0.00 0.01 0.01 0.02 0.06 0.08 0.03 0.07 0.10 0.12 0.35 0.47 0.29 0.83 1.12 1.69 4.80 6.49 1.07 3.04 4.10 4.08 11.62 15.71 3.43 9.76 13.19 2010 0.00 0.01 0.01 0.03 0.07 0.10 0.03 0.10 0.13 0.16 0.45 0.61 0.38 1.09 1.47 2.22 6.33 8.55 1.41 4.00 5.41 5.38 15.33 20.71 4.52 12.87 17.39 2011 0.00 0.01 0.02 0.03 0.09 0.13 0.04 0.12 0.17 0.20 0.57 0.77 0.48 1.36 1.84 2.78 7.92 10.70 1.76 5.01 6.77 6.73 19.16 25.90 5.65 16.09 21.75 2012 0.01 0.02 0.02 0.04 0.11 0.15 0.05 0.15 0.20 0.24 0.69 0.93 0.58 1.64 2.22 3.06 8.70 11.76 1.93 5.50 7.44 7.40 21.07 28.47 6.22 17.69 23.90 2013 0.01 0.02 0.03 0.05 0.13 0.18 0.06 0.17 0.24 0.28 0.81 1.09 0.68 1.93 2.61 3.23 9.20 12.44 2.05 5.82 7.87 7.83 22.28 30.11 6.57 18.71 25.28 2014 0.01 0.02 0.03 0.05 0.15 0.20 0.07 0.20 0.27 0.33 0.93 1.25 0.78 2.22 3.00 3.36 9.56 12.92 2.12 6.05 8.17 8.13 23.14 31.27 6.83 19.43 26.26 2015 0.01 0.02 0.03 0.06 0.16 0.22 0.08 0.21 0.29 0.35 0.99 1.34 0.83 2.37 3.21 3.45 9.83 13.28 2.18 6.22 8.40 8.36 23.79 32.15 7.02 19.98 27.00 2016 0.01 0.02 0.03 0.06 0.17 0.23 0.08 0.22 0.30 0.36 1.03 1.39 0.87 2.47 3.34 3.53 10.04 13.57 2.23 6.35 8.58 8.54 24.31 32.85 7.17 20.41 27.58 2017 0.01 0.03 0.03 0.06 0.17 0.23 0.08 0.23 0.31 0.37 1.06 1.44 0.89 2.54 3.44 3.59 10.21 13.80 2.27 6.46 8.73 8.69 24.72 33.41 7.29 20.76 28.05 2018 0.01 0.03 0.04 0.06 0.18 0.24 0.08 0.24 0.32 0.38 1.09 1.47 0.91 2.60 3.51 3.64 10.36 14.00 2.30 6.55 8.85 8.81 25.07 33.88 7.40 21.05 28.45 2019 0.01 0.03 0.04 0.06 0.18 0.24 0.08 0.24 0.32 0.39 1.10 1.49 0.93 2.64 3.57 3.68 10.48 14.16 2.33 6.63 8.96 8.91 25.37 34.28 7.48 21.30 28.79 2020 0.01 0.03 0.04 0.06 0.18 0.25 0.09 0.24 0.33 0.39 1.12 1.51 0.94 2.68 3.62 3.72 10.58 14.30 2.35 6.70 9.05 9.00 25.63 34.63 7.56 21.52 29.08 2021 0.01 0.03 0.04 0.06 0.18 0.25 0.09 0.25 0.33 0.40 1.13 1.53 0.95 2.71 3.67 3.75 10.68 14.43 2.37 6.75 9.13 9.08 25.85 34.93 7.63 21.70 29.33 2022 0.01 0.03 0.04 0.07 0.19 0.25 0.09 0.25 0.34 0.40 1.14 1.55 0.96 2.74 3.70 3.78 10.76 14.54 2.39 6.80 9.20 9.15 26.04 35.19 7.68 21.87 29.55 2023 0.01 0.03 0.04 0.07 0.19 0.25 0.09 0.25 0.34 0.41 1.15 1.56 0.97 2.76 3.73 3.80 10.83 14.63 2.41 6.85 9.26 9.21 26.22 35.43 7.73 22.01 29.75 2024 0.01 0.03 0.04 0.07 0.19 0.26 0.09 0.25 0.34 0.41 1.16 1.57 0.98 2.78 3.76 3.83 10.89 14.72 2.42 6.89 9.31 9.27 26.37 35.64 7.78 22.14 29.92 2025 0.01 0.03 0.04 0.07 0.19 0.26 0.09 0.25 0.34 0.41 1.17 1.58 0.98 2.80 3.79 3.85 10.95 14.80 2.43 6.93 9.36 9.32 26.51 35.83 7.82 22.26 30.08 2026 0.01 0.03 0.04 0.07 0.19 0.26 0.09 0.26 0.34 0.41 1.18 1.59 0.99 2.82 3.81 3.87 11.00 14.87 2.45 6.96 9.41 9.36 26.64 36.00 7.86 22.37 30.23 2027 0.01 0.03 0.04 0.07 0.19 0.26 0.09 0.26 0.35 0.42 1.18 1.60 1.00 2.83 3.83 3.88 11.05 14.94 2.46 6.99 9.45 9.40 26.76 36.16 7.89 22.47 30.36 Total 0.16 0.45 0.61 1.07 3.05 4.13 1.43 4.07 5.50 6.59 18.75 #### #### #### #### #### 190.38 ##### #### ##### ##### ##### ##### ##### ##### ##### #####

Avg. 0.01 0.02 0.02 0.04 0.12 0.17 0.06 0.16 0.22 0.26 0.75 1.01 0.63 1.80 2.43 2.68 7.62 10.29 1.69 4.82 6.51 6.48 18.44 24.91 5.44 15.48 20.92 Avg.  All Size Categories Note:

Source: TTHM  IDSE Sensitivity Analysis 2 66.48 Exhibit E. 24d Yearly Cancer Cases Avoided by System Size 100,001 1 Million > 1 Million 101 500 50,001 100,000 All Water Systems, 2% Estimate of Cancer PAR Year 501 1,000 Detail may not add to totals due to independent rounding.

Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor. Values derived using above equation and input values from Exhibits E. 13 and E. 24a. 10,001 50,000 < 100 1,001 3,300 3,301 10,000 Economic Analysis for the Stage 2 DBPR July 2003 Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total Fatal Non

Fatal Total 2003

2004

2005

2006 0.00 0.01 0.01 0.01 0.04 0.05 0.02 0.07 0.09 0.13 0.38 0.51 0.37 1.05 1.41 2.29 6.51 8.80 1.53 4.35 5.88 6.01 17.12 23.13 5.23 14.90 20.13 2007 0.00 0.01 0.02 0.03 0.09 0.12 0.06 0.16 0.21 0.32 0.91 1.22 0.88 2.49 3.37 5.44 15.49 20.94 3.64 10.35 13.99 14.32 40.75 55.06 12.46 35.46 47.91 2008 0.01 0.02 0.03 0.05 0.15 0.20 0.09 0.26 0.35 0.53 1.51 2.04 1.46 4.15 5.61 9.07 25.82 34.89 6.06 17.25 23.31 23.86 67.91 91.77 20.76 59.09 79.85 2009 0.01 0.03 0.04 0.08 0.22 0.29 0.13 0.38 0.51 0.76 2.16 2.92 2.09 5.95 8.04 13.00 37.00 50.00 8.68 24.72 33.40 34.19 97.31 131.50 29.75 84.68 114.43 2010 0.01 0.04 0.05 0.10 0.29 0.39 0.17 0.50 0.67 1.00 2.85 3.85 2.76 7.84 10.60 17.14 48.77 65.91 11.45 32.59 44.03 45.07 128.29 173.36 39.22 111.63 150.85 2011 0.02 0.05 0.07 0.13 0.36 0.48 0.22 0.62 0.84 1.25 3.57 4.82 3.45 9.81 13.25 21.43 61.00 82.43 14.32 40.75 55.07 56.37 160.43 216.80 49.05 139.60 188.64 2012 0.02 0.06 0.08 0.15 0.43 0.58 0.26 0.75 1.01 1.51 4.30 5.81 4.16 11.83 15.98 23.56 67.05 90.61 15.74 44.79 60.53 61.96 176.36 238.32 53.92 153.45 207.37 2013 0.02 0.07 0.09 0.18 0.51 0.68 0.31 0.88 1.19 1.78 5.05 6.83 4.88 13.89 18.77 24.91 70.91 95.82 16.64 47.37 64.01 65.53 186.50 252.02 57.02 162.28 219.29 2014 0.03 0.08 0.11 0.20 0.58 0.79 0.36 1.01 1.37 2.04 5.82 7.86 5.62 15.99 21.61 25.88 73.65 99.52 17.29 49.20 66.49 68.06 193.70 261.76 59.22 168.55 227.77 2015 0.03 0.09 0.12 0.22 0.62 0.84 0.38 1.08 1.46 2.18 6.21 8.39 6.00 17.07 23.07 26.60 75.72 102.32 17.77 50.59 68.36 69.97 199.16 269.13 60.89 173.29 234.18 2016 0.03 0.09 0.12 0.23 0.65 0.87 0.40 1.13 1.52 2.27 6.47 8.74 6.25 17.79 24.04 27.18 77.36 104.54 18.16 51.68 69.84 71.49 203.46 274.95 62.20 177.04 239.25 2017 0.03 0.09 0.12 0.23 0.67 0.90 0.41 1.16 1.56 2.34 6.66 9.00 6.43 18.31 24.74 27.65 78.69 106.34 18.47 52.57 71.04 72.72 206.97 279.69 63.28 180.09 243.37 2018 0.03 0.09 0.13 0.24 0.68 0.92 0.42 1.18 1.60 2.39 6.80 9.20 6.57 18.71 25.28 28.04 79.80 107.84 18.73 53.31 72.04 73.75 209.89 283.64 64.17 182.64 246.81 2019 0.03 0.10 0.13 0.24 0.69 0.94 0.42 1.20 1.63 2.43 6.92 9.35 6.69 19.03 25.72 28.37 80.74 109.11 18.95 53.94 72.90 74.62 212.37 286.99 64.93 184.79 249.72 2020 0.03 0.10 0.13 0.25 0.70 0.95 0.43 1.22 1.65 2.47 7.02 9.48 6.78 19.30 26.08 28.65 81.56 110.21 19.14 54.49 73.63 75.37 214.51 289.87 65.58 186.65 252.23 2021 0.03 0.10 0.13 0.25 0.71 0.96 0.43 1.23 1.67 2.49 7.10 9.60 6.86 19.52 26.38 28.90 82.26 111.17 19.31 54.96 74.27 76.02 216.37 292.39 66.15 188.27 254.42 2022 0.03 0.10 0.13 0.25 0.72 0.97 0.44 1.25 1.68 2.52 7.17 9.69 6.93 19.71 26.64 29.12 82.89 112.01 19.46 55.37 74.83 76.60 218.01 294.60 66.65 189.70 256.35 2023 0.03 0.10 0.13 0.25 0.72 0.98 0.44 1.26 1.70 2.54 7.23 9.77 6.99 19.88 26.87 29.32 83.44 112.76 19.59 55.74 75.33 77.11 219.46 296.57 67.09 190.96 258.06 2024 0.04 0.10 0.14 0.26 0.73 0.99 0.45 1.27 1.71 2.56 7.29 9.84 7.04 20.03 27.07 29.49 83.93 113.43 19.70 56.07 75.78 77.57 220.76 298.33 67.49 192.10 259.59 2025 0.04 0.10 0.14 0.26 0.73 0.99 0.45 1.28 1.72 2.58 7.33 9.91 7.08 20.16 27.24 29.65 84.38 114.03 19.81 56.37 76.18 77.98 221.94 299.92 67.85 193.12 260.97 2026 0.04 0.10 0.14 0.26 0.74 1.00 0.45 1.28 1.73 2.59 7.38 9.97 7.12 20.28 27.40 29.79 84.79 114.58 19.90 56.64 76.54 78.35 223.00 301.35 68.18 194.04 262.22 2027 0.04 0.10 0.14 0.26 0.74 1.00 0.45 1.29 1.74 2.60 7.41 10.02 7.16 20.38 27.54 29.92 85.15 115.07 19.99 56.89 76.88 78.69 223.97 302.67 68.47 194.89 263.36 Total 0.57 1.62 2.18 4.13 11.76 15.89 7.18 20.44 27.62 41.30 117.55 158.84 113.54 323.15 436.69 515.40 1,466.90 1,982.30 344.32 979.99 1,324.32 1,355.59 3,858.23 5,213.82 1,179.56 3,357.21 4,536.77 Avg. 0.02 0.06 0.09 0.17 0.47 0.64 0.29 0.82 1.10 1.65 4.70 6.35 4.54 12.93 17.47 20.62 58.68 79.29 13.77 39.20 52.97 54.22 154.33 208.55 47.18 134.29 181.47 Avg.  All Size Categories Note:

Source: Exhibit E. 24e Yearly Cancer Cases Avoided by System Size Surface Water Systems, 17% Estimate of Cancer PAR Year 501 1,000 1,001 3,300 3,301 10,000 10,001 50,000 < 100 101 500 TTHM  IDSE Sensitivity Analysis 2 Rnet = RPre Stage 2  [ w( t)* RPre Stage2 + ( 1 w( t))* RPost Stage 2]; where R= number of cases, and w( t)= weighting factor.

Values derived using above equation and input values from Exhibits E. 13 and E. 24a. Detail may not add to totals due to independent rounding. 50,001 100,000 100,001 1 Million > 1 Million 547.94 Economic Analysis for the Stage 2 DBPR July 2003 Annual Existing Cancer Cases  Pre Stage 2 DBPR Annual Existing Cancer Cases  Post Stage 2 Annual Reductions in Bladder Cancer Cases Attributable to the Stage 2 DBPR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR 2% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.11 0.84 0.95 < 100 0.10 0.81 0.91 < 100 0.02 0.03 0.04 101 500 0.82 5.41 6.23 101 500 0.69 5.25 5.94 101 500 0.13 0.16 0.29 501 1,000 1.43 5.47 6.90 501 1,000 1.20 5.31 6.51 501 1,000 0.22 0.16 0.39 1,001 3,300 8.20 16.74 24.94 1,001 3,300 6.91 16.24 23.15 1,001 3,300 1.28 0.50 1.79 3,301 10,000 22.53 24.98 47.51 3,301 10,000 19.01 24.23 43.24 3,301 10,000 3.53 0.75 4.28 10,001 50,000 93.44 51.52 144.96 10,001 50,000 78.82 49.58 128.40 10,001 50,000 14.62 1.94 16.56 50,001 100,000 62.43 18.78 81.21 50,001 100,000 52.66 18.08 70.73 50,001 100,000 9.77 0.71 10.48 100,001 1 Million 245.77 43.47 289.24 100,001 1 Million 207.32 41.83 249.15 100,001 1 Million 38.46 1.64 40.09 > 1 Million 213.86 5.37 219.23 > 1 Million 180.39 5.17 185.57 > 1 Million 33.46 0.20 33.66 Total 648.59 172.59 821.17 Total 547.10 166.49 713.59 Total 101.48 6.09 107.58 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR 17% Estimate of Cancer PAR Surface Water Ground Water All Sources Surface Water Ground Water All Sources Surface Water Ground Water All Sources < 100 0.98 7.32 8.31 < 100 0.83 7.10 7.93 < 100 0.15 0.22 0.37 101 500 7.16 47.25 54.41 101 500 6.04 45.83 51.87 101 500 1.12 1.42 2.54 501 1,000 12.44 47.76 60.20 501 1,000 10.49 46.33 56.82 501 1,000 1.95 1.43 3.38 1,001 3,300 71.53 146.09 217.62 1,001 3,300 60.34 141.70 202.04 1,001 3,300 11.19 4.39 15.58 3,301 10,000 196.66 218.00 414.66 3,301 10,000 165.89 211.45 377.34 3,301 10,000 30.77 6.54 37.32 10,001 50,000 815.50 449.59 1,265.09 10,001 50,000 687.90 432.66 1,120.56 10,001 50,000 127.60 16.93 144.53 50,001 100,000 544.81 163.93 708.74 50,001 100,000 459.56 157.75 617.32 50,001 100,000 85.25 6.17 91.42 100,001 1 Million 2,144.92 379.36 2,524.28 100,001 1 Million 1,809.30 365.08 2,174.38 100,001 1 Million 335.62 14.29 349.90 > 1 Million 1,866.38 46.90 1,913.28 > 1 Million 1,574.35 45.13 1,619.48 > 1 Million 292.03 1.77 293.80 Total 5,660.38 1,506.20 7,166.58 Total 4,774.70 1,453.04 6,227.74 Total 885.68 53.16 938.84 Source: Derived from figures presented in Appendix E. Annual Existing Cases  Post Stage 2 System Size ( Population Served) Annual Existing Cases  Post Stage 2 System Size ( Population Served)

System Size ( Population Served) Annual Cases Reduced by Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 System Size ( Population Served) Annual Existing Cases  Pre Stage 2 Exhibit E. 24a Expanded Cancer Case Inputs for Benefits Quantification ( TTHM  IDSE Sensitivity Analysis 2)

System Size ( Population Served) Annual Cases Reduced by Stage 2 Economic Analysis for the Stage 2 DBPR July 2003 Appendix F Valuation of Stage 2 DBPR Benefits Economic Analysis for the Stage 2 DBPR July 2003 Applicable Rule Alternative( s) Applicable DBP( s) Non fatal Case Valuation Exhibit Description Applicable Source Water Type( s) Applicable System Size Exhibit Number All Valuation Inputs All All F. 1a All CPI Projections All All F. 1b All Income Elasticity Inputs All All F. 1c All Population, GDP, & Income Projections All All F. 1d All Income Elasticity Factors All All F. 1e All Valuation Factors All All F. 1f < 100 F. 2a 101 500 F. 2b 501 1,000 F. 2c 1,001 3,300 F. 2d 3,301 10K F. 2e 10,001 50K F. 2f 50,001 100K F. 2g 100,001 1M F. 2h > 1 Million F. 2i All F. 2j < 100 F. 2k 101 500 F. 2l 501 1,000 F. 2m 1,001 3,300 F. 2n 3,301 10K F. 2o 10,001 50K F. 2p 50,001 100K F. 2q 100,001 1M F. 2r > 1 Million F. 2s All F. 2t All All F. 2u Present Value of Benefits at 3% Discount Rate All All F. 2v Present Value of Benefits at 7% Discount Rate All All F. 2w Present Value of Benefits at 3% by System Size All All F. 2x Present Value of Benefits at 7% by System Size All All F. 2y < 100 F. 3a 101 500 F. 3b 501 1,000 F. 3c 1,001 3,300 F. 3d 3,301 10K F. 3e 10,001 50K F. 3f 50,001 100K F. 3g 100,001 1M F. 3h > 1 Million F. 3i All F. 3j < 100 F. 3k 101 500 F. 3l 501 1,000 F. 3m 1,001 3,300 F. 3n 3,301 10K F. 3o 10,001 50K F. 3p 50,001 100K F. 3q 100,001 1M F. 3r > 1 Million F. 3s All F. 3t All All F. 3u Present Value of Benefits at 3% Discount Rate All All F. 3v Present Value of Benefits at 7% Discount Rate All All F. 3w Present Value of Benefits at 3% by System Size All All F. 3x Present Value of Benefits at 7% by System Size All All F. 3y Matrix of Appendix F Contents All Alternatives TTHM & HAA5 Surface Valuation of Cases Avoided Ground Surface Ground Preferred Alternative TTHM Valuation of Cases Avoided Non Fatal Lymphoma Chronic Bronchitis Economic Analysis for the Stage 2 DBPR July 2003 Matrix of Appendix F Contents ( cont.)