### USEPA

**A pproved Extrapolation Method**  **[1] [2]**  **[3] [4]**  **Proposed Proposed**  **Unit 4 (LVM) Removal**  **Max. ER at 75% LVM Feedrate** **Extrapolation Extrapolation**  Em. Std.: 92 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit Limit (Pump.)**  **(% )**  **(dscfm,7% O2)**  **(lb/hr) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 99.99961 27711 0.007151 1838 **2** 99.99923 27234 0.007028 910 **3** 99.99893 25683 0.006628 622 **Avg** 99.99926 26876 0.006936 1123 500 427

**[1] [2]**  **[3] [4]**  **Proposed Unit 4 (SVM)**  **Removal Max. ER at 75%** **SVM Feedrate Extrapolation**  Em. Std.: 230 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit (%** **) (dscfm,7%** **O2) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 99.99862 27711 0.017878 1291 **2** 99.99800 27234 0.017571 879 **3** 99.99824 25683 0.016570 943 **Avg** 99.99829 26876 0.017340 1038 500

**[1] [2]**  **[3] [4]**  **Proposed Unit 4 (Hg)**  **Removal Max. ER at 75%** **Hg Feedrate Extrapolation**  Em. Std.: 130 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit (%** **) (dscfm,7%** **O2) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 95.00 27711 0.010105 0.202 **2** 96.72 27234 0.009931 0.303 **3** 96.47 25683 0.009365 0.265 **Avg** 96.06 26876 0.009801 0.257 0.257 Extrapolated metals feedrates calculated using USEPA approved method.

### USEPA Approved Extrapolation Method (PSC H2O)

[Maximum extrap. value 3 times feed) **Total Total**  **LVM Emis. SVM Emis.**  **Hg Emis. Stackflow**  **Oxygen LVM Feed**  **Rate (ER) SVM Feed**  **Rate (ER) Hg Feed**  **Rate (ER) Test Data**  **Run (dscfm)**  **(% dry) (lb/hr)**  **(lb/hr) (lb/hr)**  **(lb/hr) (lb/hr)**  **(lb/hr) Unit 2 (8/08)**  **1** 5496 11.72 0.0023 0.000791 **2** 5572 11.54 0.0017 0.000822 **3** 5357 11.3 0.0016 0.000799 **Unit 2 (9/08) 1**  4698 11.21 46.82 0.000125 62.06 0.000398 **2** 5099 10.91 46.52 0.0000438 63.46 0.000144 **3** 5248 11.35 47.17 0.000101 63.27 0.000364 **Unit 3 (8/08) 1**  5665 11.99 47.71 0.000388 64.07 0.000799 0.0016 0.000748 **2** 5719 10.96 47.31 0.000308 65 0.00103 0.0022 0.000938 **3** 5890 11.98 48.01 0.00022 63.78 0.000655 0.0018 0.000818 **Unit 4 (8/08) 1**  17280 12.27 50.61 0.000214 63.51 0.0009 0.0257 0.00153 **2** 17255 12.13 50.65 0.000425 63.45 0.0013 0.026 0.000996 **3** 17189 11.63 49.79 0.000586 64.01 0.00116 0.0264 0.00108

### USEPA Approved Extrapolation Method (PSC H2O)

[Maximum extrap. value 3 times feed) 

### USEPA Approved Extrapolation Method **[1] [2]**  **[3] [4]**  **Proposed Proposed**  **Unit 2 (LVM) Removal**  **Max. ER at 75% LVM Feedrate** **Extrapolation Extrapolation**  Em. Std.: 92 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit (Total) Limit (Pump.)** 

**(9/08) (%)**  **(dscfm,7%O2) (lb/hr)**  **(lb/hr) (lb/hr)**  **(lb/hr)**

**1** 99.99973 6718 0.001734 649 **2** 99.99991 7075 0.001826 1939 **3** 99.99979 7614 0.001965 918 **Avg** 99.99981 7136 0.001841 1169 140 140

**[1] [2]**  **[3] [4]**  **Proposed Unit 2 (SVM)**  **Removal Max. ER at 75%** **SVM Feedrate Extrapolation**  Em. Std.: 230 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit**

**(9/08) (%)**  **(dscfm,7%O2) (lb/hr)**  **(lb/hr) (lb/hr)** 

**1** 99.99936 6718 0.004334 676 **2** 99.99977 7075 0.004564 2012 **3** 99.99942 7614 0.004912 854 **Avg** 99.99952 7136 0.004604 1180 189

**[1] [2]**  **[3] [4]**  **Proposed Unit 2 (Hg)**  **Removal Max. ER at 75%** **Hg Feedrate Extrapolation**  Em. Std.: 130 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit**

**(8/08) (%)**  **(dscfm,7%O2) (lb/hr)**  **(lb/hr) (lb/hr)** 

**1** 65.61 8291 0.003024 0.0088 **2** 51.65 8246 0.003007 0.0062 **3** 50.06 7732 0.002819 0.0056 **Avg** 55.77 8090 0.002950 0.0069 0.0057 Extrapolated metals feedrates calculated using USEPA approved method.

### USEPA Approved Extrapolation Method (PSC H2O)

[Maximum extrap. value 3 times feed)
**[1] [2]**  **[3] [4]**  **Proposed Proposed**  **Unit 3 (LVM) Removal**  **Max. ER at 75% LVM Feedrate** **Extrapolation Extrapolation**  Em. Std.: 92 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit Limit (Pump.)**  **(%) (dscfm,7%O2)**  **(lb/hr) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 99.99919 8802 0.002272 279 **2** 99.99935 7975 0.002058 316 **3** 99.99954 9142 0.002359 515 **Avg** 99.99936 8640 0.002230 370 143 143

**[1] [2]**  **[3] [4]**  **Proposed Unit 3 (SVM)**  **Removal Max. ER at 75%** **SVM Feedrate Extrapolation**  Em. Std.: 230 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit (%)**  **(dscfm,7%O2) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 99.99875 8802 0.005679 455 **2** 99.99842 7975 0.005145 325 **3** 99.99897 9142 0.005898 574 **Avg** 99.99871 8640 0.005574 451 193

**[1] [2]**  **[3] [4]**  **Proposed Unit 3 (Hg)**  **Removal Max. ER at 75%** **Hg Feedrate Extrapolation**  Em. Std.: 130 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit (%)**  **(dscfm,7%O2) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 53.25 8802 0.003210 0.0069 **2** 57.36 7975 0.002908 0.0068 **3** 54.56 9142 0.003334 0.0073 **Avg** 55.06 8640 0.003151 0.0070 0.0057 Extrapolated metals feedrates calculated using USEPA approved method.

### USEPA Approved Extrapolation Method (PSC H2O)

[Maximum extrap. value 3 times feed)
**[1] [2]**  **[3] [4]**  **Proposed Proposed**  **Unit 4 (LVM) Removal**  **Max. ER at 75% LVM Feedrate** **Extrapolation Extrapolation**  Em. Std.: 92 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit Limit (Pump.)**  **(%) (dscfm,7%O2)**  **(lb/hr) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 99.99958 27711 0.007151 1691 **2** 99.99916 27234 0.007028 838 **3** 99.99882 25683 0.006628 563 **Avg** 99.99919 26876 0.006936 1031 151 151

**[1] [2]**  **[3] [4]**  **Proposed Unit 4 (SVM)**  **Removal Max. ER at 75%** **SVM Feedrate Extrapolation**  Em. Std.: 230 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit (%)**  **(dscfm,7%O2) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 99.99858 27711 0.017878 1262 **2** 99.99795 27234 0.017571 858 **3** 99.99819 25683 0.016570 914 **Avg** 99.99824 26876 0.017340 1011 191

**[1] [2]**  **[3] [4]**  **Proposed Unit 4 (Hg)**  **Removal Max. ER at 75%** **Hg Feedrate Extrapolation**  Em. Std.: 130 ug/dscm **Efficiency (RE) Stackflow**  **of Standard OPL**  **Limit (%)**  **(dscfm,7%O2) (lb/hr)**  **(lb/hr) (lb/hr)** 
**1** 94.05 27711 0.010105 0.170 **2** 96.17 27234 0.009931 0.259 **3** 95.91 25683 0.009365 0.229 **Avg** 95.38 26876 0.009801 0.219 0.078 Extrapolated metals feedrates calculated using USEPA approved method.**2008 Metals and 2009 HCl Testing Removal Efficiencies**

**Unit 2 (LVM) Removal**  **Unit 3 (LVM) Removal**  **Unit 4 (LVM) Removal**  Em. Std.: 92 ug/dscm **Run Efficiency**  **(RE)** Em. Std.: 92 ug/dscm **Run Efficiency**  **(RE)** Em. Std.: 92 ug/dscm **Run Efficiency**  **(RE) (9/08)**  **(%) (8/08)**  **(%) (8/08)**  **(%)**

**1** 99.99973 **1** 99.99919 **1** 99.99958 **2** 99.99991 **2** 99.99935 **2** 99.99916 **3** 99.99979 **3** 99.99954 **3** 99.99882 **Av g**  99.99981 **Av g**  99.99936 **Av g**  99.99919

**Unit 2 (SVM) Removal**  **Unit 3 (SVM) Removal**  **Unit 4 (SVM) Removal**  Em. Std.: 230 ug/dscm**Run Efficiency**  **(RE)** Em. Std.: 230 ug/dscm**Run Efficiency**  **(RE)** Em. Std.: 230 ug/dscm**Run Efficiency**  **(RE) (9/08)**  **(%) (8/08)**  **(%) (8/08)**  **(%)**

**1** 99.99936 **1** 99.99875 **1** 99.99858 **2** 99.99977 **2** 99.99842 **2** 99.99795 **3** 99.99942 **3** 99.99897 **3** 99.99819 **Av g**  99.99952 **Av g**  99.99871 **Av g**  99.99824

**Unit 2 (Hg) Removal**  **Unit 3 (Hg) Removal**  **Unit 4 (Hg) Removal**  Em. Std.: 130 ug/dscm**Run Efficiency**  **(RE)** Em. Std.: 130 ug/dscm**Run Efficiency**  **(RE)** Em. Std.: 130 ug/dscm**Run Efficiency**  **(RE) (8/08)**  **(%) (8/08)**  **(%) (8/08)**  **(%)**

**1** 65.61 **1** 53.25 **1** 94.05 **2** 51.65 **2** 57.36 **2** 96.17 **3** 50.06 **3** 54.56 **3** 95.91 **Av g**  55.77 **Av g**  55.06 **Av g**  95.38

**Unit 2 (HCl/Cl2) Removal**  **Unit 3 (HCl/Cl2) Removal**  **Unit 4 (HCl/Cl2) Removal**  Em. Std.: 32 ppmv **Run Efficiency**  **(RE)** Em. Std.: 32 ppmv **Run Efficiency**  **(RE)** Em. Std.: 32 ppmv **Run Efficiency**  **(RE) (12/09)**  **(%) (12/09)**  **(%) (12/09)**  **(%)**

**1** 99.86 **1** 99.89 **1** 99.19 **2** 99.83 **2** 99.89 **2** 98.92 **3** 99.71 **3** 99.77 **3** 99.91 **Av g**  99.80 **Av g**  99.85 **Av g**  99.34