1 2 3 4 9 10 11 12 13

Available Used UPL Run ID Avg Period Data Sets Data Sets lb Hg /MMBtu 1 30 87 87 1.11E-06 2 60 83 83 1.01E-06 3 90 77 77 9.13E-07 4 180 66 66 8.04E-07 5 360 23 23 7.60E-07 6 30 87 23 1.32E-06 7 60 83 23 1.13E-06 8 90 77 23 1.03E-06 9 180 66 23 9.17E-07 10 360 23 23 7.60E-07 0.00E+00 2.00E

-07 4.00E

-07 6.00E

-07 8.00E

-07 1.00E

-06 1.20E

-06 1.40E

-06

0 lbs Hg/MMBtu

8.00E

-07 1.00E

-06 1.20E

-06 1.40E

-06 1.60E

-06 lbs Hg/MMBtu

0.00E+00 2.00E

-07 4.00E

-07 6.00E

-07 8.00E

-07 1.00E

-06 1.20E

-06

014 15 16 17 18

0 1 2 3 4 5 6 UPL Values for Various Averaging Periods based on All Available Data Hg/MMBtu

Days in Avgeraging Period

Hg/MMBtu

0 1 2 3 4 5 6 UPL Values for Various Averaging Periods based on the same data set of 23 units.

Days in Avgeraging Perioda = run

sequence

fac_stack Max_MW **CEMS Hr Count for**  **Unit Minimum** 

**Surr. Stk Test**  **Max. 30**

**Day Avg/ Min Surr.**  **Stk Test Max. 60** 

**Day Avg/ Min Surr.**  **Stk Test Max. 90** 

**Day Avg/ Min Surr.**  **Stk Test Max. 120** 

**Day Avg/ Min Surr.**  **Stk Test Max. 150** 

**Day Avg/ Min Surr.**  **Stk Test Max. 180** 

**Day Avg/ Min Surr.**  **Stk Test Max. 210** 

**Day Avg/ Min Surr.**  **Stk Test Max. 240** 

**Day Avg/ Min Surr.**  **Stk Test Max. 270** 

**Day Avg/ Min Surr.**  **Stk Test Max. 300** 

**Day Avg/ Min Surr.**  **Stk Test**

2 6165_STK3 495 6,772 5.0E-09 116.9 5.0E-09 102 5.0E-09 84 76 65 5.0E-09 61 56 52 48 47 1 130_C1 643 25,439 8.2E-09 114.4 8.2E-09 93 8.2E-09 78 68 62 8.2E-09 59 56 54 51 48 3 8069_Stk2 474 4,837 1.3E-08 82.7 1.3E-08 57 1.3E-08 48 43 40 1.3E-08 37 35 34 33 6 8069_Stk1 472 3,759 3.3E-08 40.4 3.3E-08 31 3.3E-08 29 24 21 3.3E-08 8 2451_Unit 4 Stack 548 8,697 3.5E-08 13.7 3.5E-08 12 3.5E-08 10 10 10 3.5E-08 9 8 8 9 9 21 3_ESP (4A) Exit 377 3,090 1.4E-07 36.3 1.4E-07 23 1.4E-07 18 16 1.4E-07 19 1552_Stack 1 204 4,833 9.5E-08 33.4 9.5E-08 24 9.5E-08 20 17 16 9.5E-08 16 14 11 130_C2 621 25,742 5.1E-08 29.2 5.1E-08 26 5.1E-08 25 24 24 5.1E-08 22 22 21 20 20 4 2451_Unit 2 Stack 377 3,615 2.8E-08 27.0 2.8E-08 22 2.8E-08 19 17 16 2.8E-08 10 2451_Unit 3 Stack 546 7,127 5.0E-08 26.8 5.0E-08 23 5.0E-08 20 18 17 5.0E-08 16 15 14 14 13 23 6257_Stack 3 909 7,487 2.0E-07 23.6 2.0E-07 19 2.0E-07 17 15 13 2.0E-07 12 11 11 10 9 20 1552_Stack 2 208 4,222 9.2E-08 22.7 9.2E-08 14 9.2E-08 12 13 12 9.2E-08 11 22 4162_STK 3 356 2,267 1.1E-07 21.9 1.1E-07 20 1.1E-07 17 1.1E-07 49 6193_Stack 2 373 7,240 1.2E-06 19.9 1.2E-06 12 1.2E-06 9 8 7 1.2E-06 6 6 6 5 5 15 703_Scrubber Stack (2) 773 4,522 9.3E-08 17.9 9.3E-08 15 9.3E-08 12 11 10 9.3E-08 9 8 18 4162_STK 1 174 3,791 9.0E-08 14.8 9.0E-08 14 9.0E-08 13 11 11 9.0E-08 13 3644_Stck 2 113 4,873 7.7E-08 14.1 7.7E-08 13 7.7E-08 13 11 10 7.7E-08 10 9 9 56224_STK1 241 11,691 5.1E-08 38.4 5.1E-08 34 5.1E-08 32 30 28 5.1E-08 28 27 26 25 24 26 3406_SK001 1,098 2,509 1.9E-07 13.4 1.9E-07 11 1.9E-07 8 8 1.9E-07 14 1554_Stack 2 139 6,226 1.0E-07 11.6 1.0E-07 10 1.0E-07 8 7 6 1.0E-07 6 6 6 33 6194_2St 570 5,733 7.8E-07 11.4 7.8E-07 10 7.8E-07 10 9 8 7.8E-07 7 7 6 12 2451_Unit 1 Stack 377 4,159 7.3E-08 11.1 7.3E-08 10 7.3E-08 10 10 9 7.3E-08 9 9 24 1378_SK001 662 2,021 1.7E-07 10.8 1.7E-07 7 1.7E-07 6 1.7E-07 28 6165_STK1 460 8,273 3.3E-07 5.5 3.3E-07 5 3.3E-07 5 4 4 3.3E-07 4 4 4 4 4 39 4041_OCPP-S13 529 9,481 6.3E-07 8.0 6.3E-07 7 6.3E-07 7 7 7 6.3E-07 6 6 6 6 6 7 3396_SK001 906 2,259 3.7E-08 7.6 3.7E-08 6 3.7E-08 6 3.7E-08 16 3644_Stck 1 75 4,745 9.0E-08 7.0 9.0E-08 6 9.0E-08 6 6 6 9.0E-08 6 6 32 6193_Stack 3 380 1,884 8.9E-07 6.8 8.9E-07 6 8.9E-07 8.9E-07 41 3845_FGDSSTACK2 726 4,961 8.0E-07 6.0 8.0E-07 6 8.0E-07 5 5 5 8.0E-07 5 5 5 6076_1STACK 352 6,770 6.8E-07 5.9 6.8E-07 6 6.8E-07 5 5 5 6.8E-07 5 5 5 5 35 1606_STK1 159 13,401 6.4E-07 4.1 6.4E-07 4 6.4E-07 4 4 4 6.4E-07 4 3 3 3 3 45 6170_PPPPS2 650 9,504 9.1E-07 4.0 9.1E-07 4 9.1E-07 4 4 4 9.1E-07 4 4 4 4 3 17 1378_SK003 1,089 925 1.1E-07 4.9 1.1E-07 1.1E-07 1.1E-07 37 3403_SK002 556 5,427 7.2E-07 4.7 7.2E-07 4 7.2E-07 4 4 4 7.2E-07 4 4 4 57 6761_S101 308 8,111 1.5E-06 2.6 1.5E-06 2 1.5E-06 2 2 2 1.5E-06 2 2 2 2 2 29 47_SK001 736 2,002 2.7E-07 4.6 2.7E-07 4 2.7E-07 4 2.7E-07 34 1570_9B 28 709 5.4E-07 4.5 5.4E-07 4 5.4E-07 5.4E-07 52 4158_STK43 246 5,562 1.6E-06 4.3 1.6E-06 4 1.6E-06 4 4 4 1.6E-06 4 3 3 30 703_Scrubber Stack (3) 949 6,354 3.4E-07 4.3 3.4E-07 4 3.4E-07 4 3 3 3.4E-07 3 3 3 3 53 4050_Stack - 5 429 7,313 1.5E-06 4.7 1.5E-06 4 1.5E-06 4 4 4 1.5E-06 4 4 4 4 4a = run

sequence

fac_stack Max_MW **CEMS Hr Count for**  **Unit Minimum** 

**Surr. Stk Test**  **Max. 30**

**Day Avg/ Min Surr.**  **Stk Test Max. 60** 

**Day Avg/ Min Surr.**  **Stk Test Max. 90** 

**Day Avg/ Min Surr.**  **Stk Test Max. 120** 

**Day Avg/ Min Surr.**  **Stk Test Max. 150** 

**Day Avg/ Min Surr.**  **Stk Test Max. 180** 

**Day Avg/ Min Surr.**  **Stk Test Max. 210** 

**Day Avg/ Min Surr.**  **Stk Test Max. 240** 

**Day Avg/ Min Surr.**  **Stk Test Max. 270** 

**Day Avg/ Min Surr.**  **Stk Test Max. 300** 

**Day Avg/ Min Surr.**  **Stk Test**

38 26_FGD Stack 5 905 5,700 9.5E-07 4.1 9.5E-07 4 9.5E-07 4 4 3 9.5E-07 3 3 3 3 50 6170_PPPPS1 651 9,504 1.6E-06 3.5 1.6E-06 3 1.6E-06 3 3 3 1.6E-06 3 3 3 3 3 46 4158_STK41 113 5,698 1.0E-06 4.0 1.0E-06 4 1.0E-06 3 3 3 1.0E-06 3 3 3 87 26_Shared Stack 3 4 540 5,108 1.5E-05 4.0 1.5E-05 3 1.5E-05 2 2 2 1.5E-05 2 2 80 10_Shared Stack 1 2 534 7,267 6.8E-06 3.7 6.8E-06 4 6.8E-06 3 3 3 6.8E-06 3 3 3 3 3 43 1554_Stack 3 319 8,760 1.6E-06 3.5 1.6E-06 3 1.6E-06 3 3 3 1.6E-06 3 3 3 3 3 61 6101_STK1 387 8,740 1.9E-06 8.2 1.9E-06 6 1.9E-06 5 4 4 1.9E-06 4 4 4 4 4 63 6002_Stack 2 730 9,040 2.0E-06 3.4 2.0E-06 3 2.0E-06 3 3 3 2.0E-06 3 3 3 3 3 51 4050_ESP Outlet 4 307 6,518 1.3E-06 3.4 1.3E-06 3 1.3E-06 3 3 3 1.3E-06 3 3 2 2 2 59 6002_Stack 4 725 8,265 2.1E-06 3.2 2.1E-06 3 2.1E-06 3 3 3 2.1E-06 2 2 2 2 2 68 3181_Stack 4 307 10,945 2.3E-06 5.7 2.3E-06 4 2.3E-06 3 3 3 2.3E-06 3 3 3 3 2 66 8_Shared Stack 8 9 10 1,078 8,393 2.3E-06 2.7 2.3E-06 2 2.3E-06 1 1 1 2.3E-06 1 1 1 1 1 31 4162_STK 2 231 3,558 7.1E-07 3.1 7.1E-07 3 7.1E-07 2 2 2 7.1E-07 25 6165_STK2 461 6,305 6.8E-07 3.0 6.8E-07 3 6.8E-07 3 3 3 6.8E-07 3 2 2 2 64 1048_Unit 2 Stack 224 6,245 4.7E-06 3.0 4.7E-06 3 4.7E-06 2 2 1 4.7E-06 1 1 1 1 1 48 1570_9A 28 803 8.4E-07 2.9 8.4E-07 3 8.4E-07 8.4E-07 62 8066_STK4 577 6,935 1.9E-06 2.8 1.9E-06 3 1.9E-06 3 2 2 1.9E-06 2 2 2 2 2 71 3_Shared Stack 1 2 3 548 8,728 2.4E-06 3.2 2.4E-06 3 2.4E-06 3 3 3 2.4E-06 3 3 3 3 3 65 6076_4STACK 819 2,579 2.0E-06 2.7 2.0E-06 2 2.0E-06 2 2.0E-06 73 4054_U1U2 CS Stack 232 7,588 2.6E-06 1.6 2.6E-06 1 2.6E-06 1 1 1 2.6E-06 1 1 1 1 1 56 3845_FGDSSTACK1 732 4,219 1.6E-06 2.6 1.6E-06 2 1.6E-06 2 2 2 1.6E-06 2 55 4158_STK42 115 5,727 1.4E-06 2.4 1.4E-06 2 1.4E-06 2 2 2 1.4E-06 2 2 2 72 6194_1St 565 6,128 2.9E-06 2.4 2.9E-06 2 2.9E-06 2 2 2 2.9E-06 2 2 2 70 6002_Stack 3 726 8,919 2.9E-06 2.3 2.9E-06 2 2.9E-06 2 2 2 2.9E-06 2 2 2 2 2 60 3_FGD Stack 5 773 2,025 2.0E-06 2.3 2.0E-06 2 2.0E-06 2.0E-06 58 4158_STK44 368 1,675 2.5E-06 2.2 2.5E-06 2 2.5E-06 2.5E-06 36 3399_SK001 1,309 1,436 5.7E-07 2.1 5.7E-07 2 5.7E-07 5.7E-07 44 6076_2STACK 338 8,144 1.6E-06 2.1 1.6E-06 2 1.6E-06 2 2 2 1.6E-06 2 2 2 2 2 74 8066_STK1 570 6,419 3.0E-06 2.1 3.0E-06 2 3.0E-06 2 2 2 3.0E-06 2 2 2 2 54 6076_3STACK 812 6,974 2.7E-06 2.1 2.7E-06 2 2.7E-06 2 2 2 2.7E-06 2 2 2 2 2 69 8066_STK3 570 6,749 2.4E-06 2.0 2.4E-06 2 2.4E-06 2 2 2 2.4E-06 2 2 2 2 2 84 8_Shared Stack 6 7 215 751 1.0E-05 2.0 1.0E-05 1.0E-05 1.0E-05 27 3403_SK001 489 8,048 3.1E-06 1.9 3.1E-06 2 3.1E-06 2 2 2 3.1E-06 2 2 2 2 2 67 8066_STK2 571 6,779 2.6E-06 1.9 2.6E-06 2 2.6E-06 2 2 2 2.6E-06 2 2 2 2 2 75 6002_Stack 1 720 9,096 4.0E-06 1.8 4.0E-06 2 4.0E-06 2 2 2 4.0E-06 2 2 2 2 2 78 26_Shared Stack 1 2 543 12,081 6.4E-06 3.3 6.4E-06 3 6.4E-06 3 3 2 6.4E-06 2 2 2 2 2 76 709_Shared Stack 3 4 1,027 7,794 4.3E-06 1.8 4.3E-06 2 4.3E-06 2 2 2 4.3E-06 2 2 2 2 2 77 1104_Stack - 1 216 7,021 4.1E-06 1.7 4.1E-06 2 4.1E-06 2 2 2 4.1E-06 2 2 2 2 2 42 2187_Stack1 166 7,451 3.7E-06 1.7 3.7E-06 2 3.7E-06 2 2 2 3.7E-06 2 2 2 2 2 81 8023_Unit 2 Stack 596 6,835 5.4E-06 1.7 5.4E-06 2 5.4E-06 2 2 2 5.4E-06 2 2 2 2 2a = run

sequence

fac_stack Max_MW **CEMS Hr Count for**  **Unit Minimum** 

**Surr. Stk Test**  **Max. 30**

**Day Avg/ Min Surr.**  **Stk Test Max. 60** 

**Day Avg/ Min Surr.**  **Stk Test Max. 90** 

**Day Avg/ Min Surr.**  **Stk Test Max. 120** 

**Day Avg/ Min Surr.**  **Stk Test Max. 150** 

**Day Avg/ Min Surr.**  **Stk Test Max. 180** 

**Day Avg/ Min Surr.**  **Stk Test Max. 210** 

**Day Avg/ Min Surr.**  **Stk Test Max. 240** 

**Day Avg/ Min Surr.**  **Stk Test Max. 270** 

**Day Avg/ Min Surr.**  **Stk Test Max. 300** 

**Day Avg/ Min Surr.**  **Stk Test**

82 1047_Unit 4 Stack 261 6,228 6.5E-06 1.6 6.5E-06 2 6.5E-06 1 1 1 6.5E-06 1 1 1 1 83 8023_Unit 1 Stack 595 6,979 6.5E-06 1.6 6.5E-06 2 6.5E-06 2 1 1 6.5E-06 1 1 1 1 1 86 7_Shared Stack 1 2 106 9,427 1.4E-05 1.9 1.4E-05 2 1.4E-05 2 2 2 1.4E-05 1 1 1 1 1 79 6254_Stack-1 771 7,021 5.0E-06 1.6 5.0E-06 2 5.0E-06 2 1 1 5.0E-06 1 1 1 1 1 47 50_SK003 473 769 8.1E-07 1.4 8.1E-07 8.1E-07 8.1E-07 85 3178_Stack_2 189 1,717 1.2E-05 1.0 1.2E-05 1 1.2E-05 1 1 1 1.2E-05 1 40 50_SK001 344 779 6.2E-07 0.7 6.2E-07 6.2E-07 6.2E-07

1 2 3 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20**Max. 330**

**Day Avg/ Min Surr.**  **Stk Test Max. 360** 

**Day Avg/ Min Surr.**  **Stk Test Max** 

5.0E-09 5.8E-07 46 8.2E-09 45 9.3E-07

1.3E-08 1.1E-06 3.3E-08 1.3E-06 8 3.5E-08 8 4.8E-07

1.4E-07 5.0E-06 9.5E-08 3.2E-06 19 5.1E-08 19 1.5E-06

2.8E-08 7.4E-07 5.0E-08 1.3E-06 9 2.0E-07 4.6E-06

9.2E-08 2.1E-06 1.1E-07 2.5E-06 1.2E-06 2.5E-05 9.3E-08 1.7E-06 9.0E-08 1.3E-06 7.7E-08 1.1E-06 24 5.1E-08 23 2.0E-06

1.9E-07 2.6E-06 1.0E-07 1.2E-06 7.8E-07 8.9E-06 7.3E-08 8.2E-07 1.7E-07 1.8E-06 4 3.3E-07 4 1.8E-06 6 6.3E-07 6 5.0E-06

3.7E-08 2.8E-07 9.0E-08 6.3E-07 8.9E-07 8.0E-07 4.8E-06 6.8E-07 4.0E-06 3 6.4E-07 3 2.6E-06 3 9.1E-07 3 3.7E-06

1.1E-07 5.3E-07 7.2E-07 3.4E-06 2 1.5E-06 2 4.0E-06

2.7E-07 1.3E-06 5.4E-07 2.5E-06 1.6E-06 3.4E-07 1.5E-06 4 1.5E-06 4**Max. 330**

**Day Avg/ Min Surr.**  **Stk Test Max. 360** 

**Day Avg/ Min Surr.**  **Stk Test Max** 

9.5E-07 3.9E-06 3 1.6E-06 3

1.0E-06 4.1E-06 1.5E-05 6.8E-06 3 1.6E-06 3 3 1.9E-06 3 1.6E-05 3 2.0E-06 3

1.3E-06 4.4E-06 2 2.1E-06 2 2 2.3E-06 2 1.3E-05 1 2.3E-06 1 6.4E-06

7.1E-07 2.2E-06 6.8E-07 2.0E-06 4.7E-06 8.4E-07 2.4E-06 1.9E-06 5.5E-06 3 2.4E-06 3

2.0E-06 1 2.6E-06 1

1.6E-06 4.0E-06 1.4E-06 3.3E-06 2.9E-06 2 2.9E-06 2

2.0E-06 2.5E-06 5.7E-07 1.2E-06 2 1.6E-06 3.3E-06

3.0E-06 2.7E-06 2.4E-06 1.0E-05 2 3.1E-06

2.6E-06 2 4.0E-06 1 2 6.4E-06 2 2 4.3E-06 2 4.1E-06

3.7E-06 2 5.4E-06**Max. 330**

**Day Avg/ Min Surr.**  **Stk Test Max. 360** 

**Day Avg/ Min Surr.**  **Stk Test Max** 

6.5E-06 1 6.5E-06 1 1.4E-05 1 1 5.0E-06

8.1E-07 1.2E-06 1.2E-05 6.2E-07 4.4E-07

21 22 23 24 25 26 27 28 29 30 3160.0

80.0 100.0 120.0 140.0 y= (30 Day Rolling Avg)/(6hr CEMS Surrogate for Stack Test) Figure A

- 1: Relationship Between Minimum Single Point Stack Tests and 30 Day Rolling Averages Based on Hg CEMS Data for 87 Units



## 6hr Surrogate: **3rd Percentile (0.03)**  **30 Day Rolling Avg: 99th Percentile (0.99)**  **UPL = 1.1 E**

**- 06 lbs Hg/MMBtu** 



## y = 0.0032x

- 0.521 

## R2 = 0.7323

0.0 20.0 40.0 60.0

0.0E+00 2.0E

- 06 4.0E

- 06 6.0E

- 06 8.0E

- 06 1.0E

- 05 1.2E

-05 1.4E

-05 1.6E

-05 x= Surrogate Stack Test (lbs Hg/MMBtu)**Spruance Genco, LLC Spruance Genco, LLC**  **Spruance Genco, LLC 54081**  **54081 54081**  **2B 2A**  **3A** 2.4864E-07 2.4864E-07 3.2782E-07**Spruance Genco, LLC Logan Generating Plant**  **Nucla Seward**  **54081 10043**  **527 3130**  **3B B01**  **1 1**  3.2782E-07 3.4864E-07 3.4864E-07 3.7903E-07**Seward AES Greenidge** 

**3130 2527**  **2 6**  3.7903E-07 3.8217E-07**Roanoke Valley I AES Westover, LLC**  **INDIANTOWN COGENERATIO**  **N L.P. 54035**  **2526 50976**  **BLR1 13**  **AABO1** 4.0424E-07 4.2705E-07 4.3680E-07**Northampton Generating**

**Company, L.P. 50888**  **BLR1** 4.8000E-07

## y = 0.0033x

- 0.514 

## R2 = 0.8031 60 80 100 120 y= (60 Day Rolling Avg)/(6hr CEMS Surrogate for Stack Test) The Relationship Between Minimum Single Point Stack Tests and 60 Day Rolling Averages Based on Hg CEMS Data for 84 Units



## 6hr Surrogate: **3rd Percentile (0.03)**  **60 Day Rolling Avg: 99th Percentile (0.99)**  **UPL = 1.01 E**

**- 06 lbs Hg/MMBtu** 



## R2 = 0.8031

0 20 40

0.0E+00 2.0E

- 06 4.0E

- 06 6.0E

- 06 8.0E

- 06 1.0E

- 05 1.2E

-05 1.4E

-05 1.6E

-05 x= Surrogate Stack Test (lbs Hg/MMBtu)**Spruance Genco, LLC Spruance Genco, LLC**  **Spruance Genco, LLC 54081**  **54081 54081**  **2B 2A**  **3A** 2.2330E-07 2.2330E-07 2.9560E-07**Spruance Genco, LLC Logan Generating Plant**  **Nucla Seward**  **54081 10043**  **527 3130**  **3B B01**  **1 1**  2.9560E-07 3.1466E-07 3.1466E-07 3.4250E-07**Seward AES Greenidge** 

**3130 2527**  **2 6**  3.4250E-07 3.4538E-07**Roanoke Valley I AES Westover, LLC**  **INDIANTOWN COGENERATIO**  **N L.P. 54035**  **2526 50976**  **BLR1 13**  **AABO1** 3.6562E-07 3.8656E-07 3.9552E-07**Northampton Generating**

**Company, L.P. 50888**  **BLR1** 4.3524E-07

## y = 0.0039x

- 0.498

40 50 60 70 80 90 y= (90 Day Rolling Avg)/(6hr CEMS Surrogate for Stack Test) The Relationship Between Minimum Single Point Stack Tests and 90 Day Rolling Averages Based on Hg CEMS Data for 77 Units



## 6hr Surrogate: **3rd Percentile (0.03)**  **90 Day Rolling Avg: 99th Percentile (0.99)**  **UPL = 0.91 E**

**- 06 lbs Hg/MMBtu** 



## y = 0.0039x R2 = 0.8311

0 10 20 30

0.0E+00 2.0E

- 06 4.0E

- 06 6.0E

- 06 8.0E

- 06 1.0E

- 05 1.2E

-05 1.4E

-05 1.6E

-05 x= Surrogate Stack Test (lbs Hg/MMBtu)**Spruance Genco, LLC Spruance Genco, LLC**  **Spruance Genco, LLC 54081**  **54081 54081**  **2B 2A**  **3A** 1.9238E-07 1.9238E-07 2.5704E-07**Spruance Genco, LLC Logan Generating Plant**  **Nucla Seward**  **54081 10043**  **527 3130**  **3B B01**  **1 1**  2.5704E-07 2.7417E-07 2.7417E-07 2.9927E-07**Seward AES Greenidge** 

**3130 2527**  **2 6**  2.9927E-07 3.0186E-07**Roanoke Valley I AES Westover, LLC**  **INDIANTOWN COGENERATIO**  **N L.P. 54035**  **2526 50976**  **BLR1 13**  **AABO1** 3.2015E-07 3.3912E-07 3.4723E-07**Northampton Generating**

**Company, L.P. 50888**  **BLR1** 3.8331E-07

## y = 0.004x

- 0.489

30 40 50 60 70 y= (180 Day Rolling Avg)/(6hr CEMS Surrogate for Stack Test) The Relationship Between Minimum Single Point Stack Tests and 180 Day Rolling Averages Based on Hg CEMS Data for 66 Units



## 6hr Surrogate: **3rd Percentile (0.03)**  **180 Day Rolling Avg: 99th Percentile (0.99)**  **UPL = 0.91 E**

**- 06 lbs Hg/MMBtu** 



## y = 0.004x

- 0.489 

## R2 = 0.8624

0 10 20

0.0E+00 2.0E

- 06 4.0E

- 06 6.0E

- 06 8.0E

- 06 1.0E

- 05 1.2E

-05 1.4E

-05 1.6E

-05 x= Surrogate Stack Test (lbs Hg/MMBtu)**Spruance Genco, LLC Spruance Genco, LLC**  **Spruance Genco, LLC 54081**  **54081 54081**  **2B 2A**  **3A** 1.6517E-07 1.6517E-07 2.2183E-07**Spruance Genco, LLC Logan Generating Plant**  **Nucla Seward**  **54081 10043**  **527 3130**  **3B B01**  **1 1**  2.2183E-07 2.3690E-07 2.3690E-07 2.5899E-07**Seward AES Greenidge** 

**3130 2527**  **2 6**  2.5899E-07 2.6127E-07**Roanoke Valley I AES Westover, LLC**  **INDIANTOWN COGENERATIO**  **N L.P. 54035**  **2526 50976**  **BLR1 13**  **AABO1** 2.7740E-07 2.9413E-07 3.0130E-07**Northampton Generating**

**Company, L.P. 50888**  **BLR1** 3.3319E-0725

30 35 40 45 50 y= (360 Day Rolling Avg)/(6hr CEMS Surrogate for Stack Test) The Relationship Between Minimum Single Point Stack Tests and 360 Day Rolling Averages Based on Hg CEMS Data for 23 Units



## 6hr Surrogate: **3rd Percentile (0.03)**  **360 Day Rolling Avg: 99th Percentile (0.99)**  **UPL = 0.76 E**

**- 06 lbs Hg/MMBtu** 



## y = 0.0044x

- 0.48 

## R2 = 0.8607

0 5 10 15 20

0.0E+00 2.0E

- 06 4.0E

- 06 6.0E

- 06 8.0E

- 06 1.0E

- 05 1.2E

-05 1.4E

-05 1.6E

-05 x= Surrogate Stack Test (lbs Hg/MMBtu)**Spruance Genco, LLC Spruance Genco, LLC**  **Spruance Genco, LLC 54081**  **54081 54081**  **2B 2A**  **3A** 1.5210E-07 1.5210E-07 2.0533E-07**Spruance Genco, LLC Logan Generating Plant**  **Nucla Seward**  **54081 10043**  **527 3130**  **3B B01**  **1 1**  2.0533E-07 2.1953E-07 2.1953E-07 2.4038E-07**Seward AES Greenidge** 

**3130 2527**  **2 6**  2.4038E-07 2.4254E-07**Roanoke Valley I AES Westover, LLC**  **INDIANTOWN COGENERATIO**  **N L.P. 54035**  **2526 50976**  **BLR1 13**  **AABO1** 2.5778E-07 2.7361E-07 2.8039E-07**Northampton Generating**

**Company, L.P. 50888**  **BLR1** 3.1063E-07**Spruance Genco, LLC Spruance Genco, LLC**  **Spruance Genco, LLC 54081**  **54081 54081**  **2B 2A**  **3A** 2.6333E-09 2.6333E-09 4.6900E-09**Spruance Genco, LLC Logan Generating Plant**  **Nucla Seward**  **54081 10043**  **527 3130**  **3B B01**  **1 1**  4.6900E-09 5.3333E-09 5.3333E-09 6.3500E-09 9.8533E-09 5.5333E-08 6.0000E-09 3.8000E-08**Seward AES Greenidge** 

**3130 2527**  **2 6**  6.3500E-09 6.4602E-09 5.5333E-08 7.6771E-08 3.8000E-08**Roanoke Valley I AES Westover, LLC**  **INDIANTOWN COGENERATIO**  **N L.P. 54035**  **2526 50976**  **BLR1 13**  **AABO1** 7.2633E-09 8.1456E-09 8.5384E-09 5.4900E-07**Northampton Generating**

**Company, L.P. 50888**  **BLR1** 1.0397E-08 1.2872E-0760

80 100 120 y= (30 Day Rolling Avg)/(6hr CEMS Surrogate for Stack Test) The Relationship Between Minimum Single Point Stack Tests and 30 Day Rolling Averages Based on Hg CEMS Data for 87 Units



## 6hr Surrogate: **3rd Percentile (0.03)**  **30 Day Rolling Avg: 99th Percentile (0.99)**  **UPL = 1.1 E**

**- 06 lbs Hg/MMBtu** 



## y = 0.0033x

- 0.514 

## R2 = 0.8031

0 20 40

0.0E+00 2.0E

- 06 4.0E

- 06 6.0E

- 06 8.0E

- 06 1.0E

- 05 1.2E

-05 1.4E

-05 1.6E

-05 x= Surrogate Stack Test (lbs Hg/MMBtu)