RPTv4_6_3.dot 10964 Limestone Final Report_ltrhd 06222010 035500 10964 

### REPORT ON UTILITY BOILER MACT ICR TESTING

Performed for: NRG TEXAS POWER LLC UNIT 1 AND UNIT 2 STACKS LIMESTONE GENERATING STATION

Client Reference No: 90838 CleanAir Project No: 10964

Revision 0: June 22, 2010

To the best of our knowledge, the data presented in this report are accurate, complete, error free, legible and representative of the actual emissions during the test program.

Submitted by, Reviewed by,

_________________________________ _________________________________ Bart DeLatte Southern Engineering Group Leader bdelatte@cleanair.com (800) 723-0362 Mark Roach, P.E. Engineering Group Technical Leader mroach@cleanair.com (800) 627-0033 ext. 4599 NRG Texas Power LLC 1301 McKinney, Suite 2300 Houston, TX 77010

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

REVISION HISTORY ii

Revision 0, Final 

### REPORT ON UTILITY BOILER MACT ICR TESTING

DRAFT REPORT REVISION HISTORY

Revision: Date Pages Comments D0a 06/01/10 All Draft version of original document.

FINAL REPORT REVISION HISTORY

Revision: Date Pages Comments 0 06/22/10 All Final version of original document.

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

CONTENTS iii

Revision 0, Final 1 PROJECT OVER VIEW.....................................................................................................1-1 INTRODUCTIO N ..............................................................................................................1-1 Key Project Part icipants ...............................................................................................1-1 Test Program Pa rameters ............................................................................................1-1 TEST PROGRAM SYNOPSIS..........................................................................................1-2 Test Schedul e...............................................................................................................1-2
Table 1-1: Schedule of Activi ties ............................................................................................1- 2 Results Su mmary ......................................................................................................... 1-3 Table 1-2: Summary of Test Re sults......................................................................................1-3 Discussion of Test Program .........................................................................................1-4

2 RESULTS ........................................................................................................................ .2-1
Table 2-1: Unit 1 – Fuel A nalysis...........................................................................................2- 1
Table 2-2: Unit 1 – Total Hydr ocarbons .................................................................................2-2 Table 2-3: Unit 1 – Formaldehy de, Methane, Car bon Monoxid e ...........................................2-3
Table 2-4: Unit 2 – Fuel A nalysis...........................................................................................2- 4
Table 2-5: Unit 2 – Total Hydr ocarbons .................................................................................2-5 Table 2-6: Unit 2 – Formaldehy de, Methane, Car bon Monoxid e ...........................................2-6

3 DESCRIPTION OF IN STALLATI ON................................................................................3-1 PROCESS DESCRI PTION...............................................................................................3-1 DESCRIPTION OF SAMPL ING LOCATI ONS..................................................................3-2
Table 3-1: Sa mpling Po ints ....................................................................................................3 -2 Figure 3-1: Unit 1 and Unit 2 Sampli ng Point Determinati on (EPA Met hod 1) ........................3-3

4 METHODOL OGY .............................................................................................................4-1 Table 4-1: Summary of Sampling Pr ocedures ........................................................................4-1

5 APPENDIX....................................................................................................................... .5-1 TEST METHOD SPEC IFICATIONS ....................................................................................A SAMPLE CALCUL ATIONS..................................................................................................B PARAMETERS ....................................................................................................................C QA/QC DATA..................................................................................................................... ..D FIELD DATA PR INTOUTS ..................................................................................................E PLANT DATA..................................................................................................................... ..F FUEL ANALYSIS ................................................................................................................ G PROTOC OL....................................................................................................................... ..H RESUMES ........................................................................................................................ .... I

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

PROJECT OVERVIEW 1-1

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### INTRODUCTION NRG Texas Power LLC (NRG) contracted Clean Air Engineering (CleanAir) to perform emissions testing at the Limestone Generating Station located in Jewett, Texas, to provide data for the Utility Boiler MACT(Maximum Achievable Control Technology) ICR (Information Collection Request).

All testing was conducted in accordance with the regulations set-forth by the United States Environmental Protection Agency (EPA) and the Texas Commission on Environmental Quality (TCEQ).

Key Project Participants Individuals responsible for coordinating and conducting the test program were:

Perry Galloway – NRG Texas Power LLC John Hudspeth – NRG Texas Power LLC Bart Delatte – CleanAir

Test Program Parameters The testing was performed at the Unit 1 and Unit 2 Stacks on April 20 and April 22, 2010, and included the following measurements:

• oxygen (O 2 

### ) • carbon dioxide (CO 2 

### ) • carbon monoxide (CO) • methane (CH 4 

### ) • formaldehyde (HCOH) • total hydrocarbons (THC) 1 Project Overview

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

PROJECT OVERVIEW 1-2

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### TEST PROGRAM SYNOPSIS

Test Schedule The on-site schedule followed during the test program is outlined in Table 1-1.

Table 1-1: Schedule of Activities

Run Number Location Method Analyte Date Start Time End Time
1 Unit 1 Stack UPEPA Methods 3A, 25A Oxygen, Carbon Dioxide, THC 04/20/10 09:50 12:05
2 Unit 1 Stack UPEPA Methods 3A, 25A Oxygen, Carbon Dioxide, THC 04/20/10 13:02 15:23
3 Unit 1 Stack UPEPA Methods 3A, 25A Oxygen, Carbon Dioxide, THC 04/20/10 15:47 18:02

1 Unit 1 Stack USEPA Method 320 Formaldehyde, Methane, Carbon Monoxide 04/20/10 09:50 12:05
2 Unit 1 Stack USEPA Method 320 Formaldehyde, Methane, Carbon Monoxide 04/20/10 13:02 15:22
3 Unit 1 Stack USEPA Method 320 Formaldehyde, Methane, Carbon Monoxide 04/20/10 15:46 18:03

1 Unit 2 Stack UPEPA Methods 3A, 25A Oxygen, Carbon Dioxide, THC 04/22/10 09:00 11:15
2 Unit 2 Stack UPEPA Methods 3A, 25A Oxygen, Carbon Dioxide, THC 04/22/10 11:55 14:10
3 Unit 2 Stack UPEPA Methods 3A, 25A Oxygen, Carbon Dioxide, THC 04/22/10 14:45 17:00

1 Unit 2 Stack USEPA Method 320 Formaldehyde, Methane, Carbon Monoxide 04/22/10 09:00 11:15
2 Unit 2 Stack USEPA Method 320 Formaldehyde, Methane, Carbon Monoxide 04/22/10 11:55 14:11
3 Unit 2 Stack USEPA Method 320 Formaldehyde, Methane, Carbon Monoxide 04/22/10 14:45 17:00

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

PROJECT OVERVIEW 1-3

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### TEST PROGRAM SYNOPSIS (CONTINUED)

Results Summary Table 1-2 summarizes the results of the test program. A more detailed presentation of the test conditions and results of analysis are shown in Tables 2-1 through 2-6 on pages 2-1 through 2-6.

Table 1-2: Summary of Test Results

Source

Constituent

Unit 1 Stack Formaldeh y de lb/MMBtu EPA 320 <0.00006 * ppmdv @ 7%O 2 <0.051 *
Methane lb/MMBtu EPA 320 0.0003 ppmdv @ 7%O 2 0.382
Carbon Monoxide lb/MMBtu EPA 320 0.021 ppmdv @ 7%O 2 17.0 Total Hydrocarbons lb/MMBtu EPA 25A 0.00003 ppmdv @ 7%O 2 0.019
O 2 % dv EPA 3A 5.1 CO 2 % dv EPA 3A 14.5
H 2 O % EPA 320 18.6

Unit 2 Stack Formaldehyde lb/MMBtu EPA 320 <0.00006 * ppmdv @ 7%O 2 <0.051 *
Methane lb/MMBtu EPA 320 <0.00004 * ppmdv @ 7%O 2 <0.061 *
Carbon Monoxide lb/MMBtu EPA 320 0.025 ppmdv @ 7%O 2 21.5 Total Hydrocarbons lb/MMBtu EPA 25A 0.00012 ppmdv @ 7%O 2 0.073
O 2 % dv EPA 3A 5.0 CO 2 % dv EPA 3A 14.7
H 2 O % EPA 320 19.1

* - Number below Quantification Limit (QL). Value presented based upon calculation using QL. Sampling

Method Average Emission Units

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

PROJECT OVERVIEW 1-4

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### TEST PROGRAM SYNOPSIS (CONTINUED)

Discussion of Test Program Testing on Unit 1 occurred on April 20, 2010. Flue gas was extracted from the stack, directed through a Fourier Transform Infrar ed (FTIR) detector and passed a Flame Ionization Detector (FID). The sample was then routed through a refrigerated moisture removal system and subsequently directed via a flow distribution panel to a paramagnetic analyzer for oxygen analysis and a NDIR analyzer for carbon dioxide analysis.

CEM (continuous emission monitor) data (O 2 

### , CO 2 

### , THC) was collected every second and averaged every minute. Minute averages are presented in the report tables. FTIR scans (for formaldehyde, methane and CO) were collected at approximately 5-minute intervals. This time frame was chosen to reduce noise and increase the sensitivity for the analytes of interest, while still providing as many data points as possible during the test period.

During run1, a stratification check was performed utilizing the 12 sample points determined from Method 1. The stratification check passed the criteria. However, it was decided to traverse all the points for each of the runs.

Unit 1, run 2 was extended an additional five (5) minutes because the FTIR analyzer required additional liquid nitrogen and was not back online to take the first reading of the next port.

Testing on Unit 2 occurred on April 22, 2010. Testing proceeded in an identical manner as it did on Unit 1. A stratification check revealed CO stratification and it was decided to traverse all points for all three (3) runs.

Formaldehyde measurements on both units were below the Quantification Limit (QL), as was methane on Unit 2. The results section and the appendices of this report list the values as determined. The results summary table presents values calculated using the QL for these compounds as directed by the ICR guidance documentation.

During each test run fuel samples were collect ed from the coal feeders at the beginning, one (1) hour into and end of the run. All feeders were sampled over the course of each run. The samples were sent to Consol Energy for composition and Proximate/Ultimate, Sulfur and HHV analysis. The fuel analysis was used to determine a dry F-Factor used in the lb/MMBtu emission calculations.

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

PROJECT OVERVIEW 1-5

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### Deviations from protocol: A CO calibration gas at a concentration of 47.4 ppm was used as the calibration transfer standard (CTS) in Method 320. This replaced the 100 ppm ethylene calibration gas stated in the protocol. The lower concentration of CO is believed to be a more appropriate choice because 1) CO is one the analytes being measured, and 2) the calibration gas lower concentration results in a more accurate CTS check.

End of Section 1 – Project Overview

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

RESULTS 2-1

Revision 0, Final Table 2-1: Unit 1 – Fuel Analysis

Run No. 1 2 3 Average

Date (2010) Apr 20 Apr 20 Apr 20 Start Time (approx.) 09:50 13:02 15:46 Stop Time (approx.) 12:05 15:22 18:03

Coal Analysis, dry basis

C Carbon (%, wt) 62.77 63.29 65.26 63.77 H Hydrogen (%, wt) 3.97 3.98 4.32 4.09 N Nitrogen (%, wt) 1.07 1.04 1.14 1.08 S Sulfur (%, wt) 1.12 1.40 0.69 1.07 Ash Ash (%,wt) 18.03 15.95 14.86 16.28 O Oxygen, by diff (%, wt) 13.04 14.34 13.73 13.70 GCV Measured gross calorific value (Btu/lb) 10,312 10,335 10,788 10,478

Coal Analysis, as received Moisture (%, wt) 31.19 30.87 31.46 31.17 C Carbon (%, wt) 43.19 43.75 44.73 43.89 H Hydrogen (%, wt) 2.73 2.75 2.96 2.81 N Nitrogen (%, wt) 0.74 0.72 0.78 0.75 S Sulfur (%, wt) 0.77 0.97 0.47 0.74 Ash Ash (%, wt) 12.41 11.03 10.19 11.21 O Oxygen, by diff (%, wt) 8.97 9.91 9.41 9.43 GCV Measured gross calorific value (Btu/lb) 7,096 7,145 7,394 7,211

Combustion Factors

F d Dry F-factor (scf/MBtu) 10,209 10,224 10,179 10,204
F w Wet F-factor (scf/MBtu) 11,875 11,875 11,845 11,865
F c Carbon F-factor (scf/MBtu) 1,954 1,966 1,942 1,954

Maximum Possible Sulfur Dioxide Emission Rate

E MP Sulfur dioxide emission rate (lb/MMBtu) 2.17 2.71 1.28 2.05

Predicted Gross Calorific Value

GCV p Predicted HHV, dry basis (Btu/lb) 1 10,646 10,684 11,179 10,837 Difference from measured GCV (%) -3.2 -3.4 -3.6 -3.4 

### 2 Results

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

RESULTS 2-2

Revision 0, Final Table 2-2: Unit 1 – Total Hydrocarbons

Run No. 1 2 3 Average Date (2010) Apr 20 Apr 20 Apr 20 Start Time 9:50 13:02 15:47 End Time 12:05 15:23 18:02 Elapsed Time 2:15 2:21 2:15

Gas Parameters Oxygen (O2) - Unit 1 Stack (%dv) 5.02 5.11 5.12 5.08 Carbon Dioxide (CO2) - Unit 1 Stack (%dv) 14.55 14.56 14.47 14.53

H2O - Unit 1 Stack (%) 18.55 18.47 18.64 18.55 Fd1 - Unit 1 Stack (dscf/MMBtu) 10,209 10,224 10,179 10,204

Total Hydrocarbons (THC) - Unit 1 Stack Concentration (ppmwv) 0.054 <0.000 <0.000 0.018 Concentration @7%O2 (ppm) 0.058 <0.000 <0.000 0.019 Mass Rate (lb/MMBtu) - Fd 0.00010 <0.00000 <0.00000 0.00003

“<” Indicates the analyte conc entration is below detection.

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

RESULTS 2-3

Revision 0, Final Table 2-3: Unit 1 – Formaldehyde, Methane, Carbon Monoxide

Run No. 1 2 3 Average

Date (2010) Apr 20 Apr 20 Apr 20 Start Time (approx.) 09:50 13:02 15:46 End Time (approx.) 12:05 15:22 18:03 Elapsed Time 02:15 02:20 02:17

Parameters C SF6 SF6 Concentration in Bottle (ppm) 5.10 5.10 5.10
C form Formaldehye Concentration in Bottle (ppm) 10.00 10.00 10.00
C CO CO Concentration in Bottle (ppm) 47.40 47.40 47.40

F d Ratio of gas volume to heat content of fuel (dscf/MMBtu) 10,209 10,335 10,179

Run Data Form Out Formaldehyde (ppmwv) <0.0500 <0.0500 <0.0500 <0.0500
Meth Out Methane (ppmwv) 0.363 0.395 0.370 0.376
CO Out Carbon Monoxide (ppmwv) 20.9 16.0 14.1 17.0
O 2Out Oxygen (%) 5.0 5.1 5.1 5.1
H 2 O Out Moisture (%) 18.55 18.47 18.64 18.55

Results Form Out Formaldehyde (ppmdv) <0.0614 <0.0613 <0.0615 <0.0614
Form Out Formaldehyde (ppmdv %7% O 2 ) <0.0438 <0.0540 <0.0541 <0.0506
Form Out Formaldehyde (lb/MMBtu) <0.00006 <0.00007 <0.00006 <0.00006

Meth Out Methane (ppmdv) 0.446 0.485 0.455 0.462
Meth Out Methane (ppmdv %7% O 2 ) 0.318 0.427 0.401 0.382
Meth Out Methane (lb/MMBtu) 0.0002 0.0003 0.0003 0.0003

CO Out Carbon Monoxide (ppmdv) 25.7 19.7 17.4 20.9
CO Out Carbon Monoxide (ppmdv %7% O 2 ) 18.3 17.3 15.3 17.0
CO Out Carbon Monoxide (lb/MMBtu) 0.025 0.020 0.017 0.021

“<” Indicates the analyte conc entration is below detection.

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

RESULTS 2-4

Revision 0, Final Table 2-4: Unit 2 – Fuel Analysis

Run No. 1 2 3 Average

Date (2010) Apr 22 Apr 22 Apr 22 Start Time (approx.) 09:00 11:55 14:45 Stop Time (approx.) 11:15 14:11 17:00

Coal Analysis, dry basis

C Carbon (%, wt) 62.79 61.31 64.30 62.80 H Hydrogen (%, wt) 4.39 4.09 4.31 4.26 N Nitrogen (%, wt) 1.15 1.20 1.22 1.19 S Sulfur (%, wt) 0.86 1.08 0.68 0.87 Ash Ash (%,wt) 13.18 13.62 13.81 13.54 O Oxygen, by diff (%, wt) 17.63 18.70 15.68 17.34 GCV Measured gross calorific value (Btu/lb) 10,405 10,307 10,752 10,488

Coal Analysis, as received Moisture (%, wt) 29.98 31.37 31.17 30.84 C Carbon (%, wt) 43.97 42.08 44.26 43.43 H Hydrogen (%, wt) 3.07 2.81 2.97 2.95 N Nitrogen (%, wt) 0.81 0.82 0.84 0.82 S Sulfur (%, wt) 0.60 0.74 0.47 0.60 Ash Ash (%, wt) 9.23 9.35 9.51 9.36 O Oxygen, by diff (%, wt) 12.34 12.83 10.79 11.99 GCV Measured gross calorific value (Btu/lb) 7,286 7,074 7,401 7,253

Combustion Factors

F d Dry F-factor (scf/MBtu) 10,052 9,787 9,990 9,943
F w Wet F-factor (scf/MBtu) 11,730 11,484 11,648 11,621
F c Carbon F-factor (scf/MBtu) 1,937 1,909 1,920 1,922

Maximum Possible Sulfur Dioxide Emission Rate

E MP Sulfur dioxide emission rate (lb/MMBtu) 1.65 2.09 1.26 1.67

Predicted Gross Calorific Value

GCV p Predicted HHV, dry basis (Btu/lb) 1 10,672 10,230 10,935 10,612 Difference from measured GCV (%) -2.6 0.7 -1.7 -1.2

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

RESULTS 2-5

Revision 0, Final Table 2-5: Unit 2 – Total Hydrocarbons

Run No. 1 2 3 Average Date (2010) Apr 22 Apr 22 Apr 22 Start Time 9:00 11:55 14:45 End Time 11:15 14:10 17:00 Elapsed Time 2:15 2:15 2:15

Gas Parameters Oxygen (O2) - Unit 2 Stack (%dv) 4.98 5.05 5.02 5.02 Carbon Dioxide (CO2) - Unit 2 Stack (%dv) 14.67 14.45 14.91 14.67

H2O - Unit 2 Stack (%) 19.02 19.12 19.26 19.14 Fd1 - Unit 2 Stack (dscf/MMBtu) 10,052 9,787 9,990 9,943

Total Hydrocarbons (THC) - Unit 2 Stack Concentration (ppmwv) <0.000 0.201 <0.000 0.067 Concentration @7%O2 (ppm) <0.000 0.218 <0.000 0.073 Mass Rate (lb/MMBtu) - Fd <0.00000 0.00037 <0.00000 0.00012

“<” Indicates the analyte conc entration is below detection.

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

RESULTS 2-6

Revision 0, Final Table 2-6: Unit 2 – Formaldehyde, Methane, Carbon Monoxide

Run No. 1 2 3 Average

Date (2010) Apr 22 Apr 22 Apr 22 Start Time (approx.) 09:00 11:55 14:45 End Time (approx.) 11:15 14:11 17:00 Elapsed Time 02:15 02:16 02:15

Parameters C SF6 SF6 Concentration in Bottle (ppm) 5.10 5.10 5.10
C form Formaldehye Concentration in Bottle (ppm) 10.00 10.00 10.00
C CO CO Concentration in Bottle (ppm) 47.40 47.40 47.40

F d Ratio of gas volume to heat content of fuel (dscf/MMBtu) 10,052 9,787 9,990

Run Data Form Out Formaldehyde (ppmwv) <0.0500 <0.0500 <0.0500 <0.0500
Meth Out Methane (ppmwv) 0.036 -0.067 -0.133 -0.054
CO Out Carbon Monoxide (ppmwv) 21.4 23.3 19.1 21.3
O 2Out Oxygen (%) 5.0 5.1 5.0 5.0
H 2 O Out Moisture (%) 19.02 19.12 19.26 19.14

Results Form Out Formaldehyde (ppmdv) <0.0617 <0.0618 <0.0619 <0.0618
Form Out Formaldehyde (ppmdv %7% O 2 ) <0.0437 <0.0542 <0.0542 <0.0507
Form Out Formaldehyde (lb/MMBtu) <0.00006 <0.00006 <0.00006 <0.00006

Meth Out Methane (ppmdv) 0.045 -0.082 -0.164 -0.067
Meth Out Methane (ppmdv %7% O 2 ) 0.031 -0.072 -0.144 -0.061
Meth Out Methane (lb/MMBtu) 0.0000 0.0000 -0.0001 0.0000

CO Out Carbon Monoxide (ppmdv) 26.5 28.8 23.6 26.3
CO Out Carbon Monoxide (ppmdv %7% O 2 ) 18.7 25.2 20.7 21.5
CO Out Carbon Monoxide (lb/MMBtu) 0.025 0.027 0.023 0.025

“<” Indicates the analyte conc entration is below detection.

End of Section 2 – Results

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

DESCRIPTION OF INSTALLATION 3-1

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### PROCESS DESCRIPTION NRG Texas Power owns and operates the Limestone Power Plant. Limestone has two (2) lignite/coal-fueled steam generators with a net generating capacity of 1689 megawatts (MW). Unit 1 is an 831 net MW drum-type reheat unit. It was placed into commercial operation on December 1, 1985. Unit 2 is a similar unit rated at 858 net MW. It was placed into commercial operation on December 1, 1986. Both units have been modified for increased generation from their original capacities of 750 MW. Cooling water for the main condensers is circulated through mechanical draft cooling towers with makeup from Lake Limestone. Limestone utilizes low NOx burners for NOx control, electrostatic precipitators for particulate control and flue gas desulphurization systems for sulfur dioxide (SO 2 

### ) removal.

The testing reported in this document was performed at the stacks of Unit 1 and Unit 2. 3 Description of Installation

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

DESCRIPTION OF INSTALLATION 3-2

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### DESCRIPTION OF SAMPLING LOCATIONS Sampling point locations were determined according to EPA Method 1.

Table 3-1 outlines the sampling point conf igurations. Figure 3-1 (on page 3-3) illustrates the sampling points and orientation of sampling ports for each of the sources tested in the program.

Table 3-1: Sampling Points

Source
Constituent

Unit 1 Stack O 2 EPA 3A 1-3 4 3 10 120 3-1
CO 2 EPA 3A 1-3 4 3 10 120 3-1 THC EPA 25A 1-3 4 3 10 120 3-1 H 2 CO EPA 320 1-3 4 3 10 120 3-1
CH 4 EPA 320 1-3 4 3 10 120 3-1 CO EPA 320 1-3 4 3 10 120 3-1

Unit 2 Stack O 2 EPA 3A 1-3 4 3 10 120 3-1 CO 2 EPA 3A 1-3 4 3 10 120 3-1 THC EPA 25A 1-3 4 3 10 120 3-1 H 2 CO EPA 320 1-3 4 3 10 120 3-1 CH 4 EPA 320 1-3 4 3 10 120 3-1
CO EPA 320 1-3 4 3 10 120 3-1 Minutes per Point Total Minutes Figure Method Run No. Points per Port Ports

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

DESCRIPTION OF INSTALLATION 3-3

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### DESCRIPTION OF SAMPLING LOCATIONS (CONTINUED)

Traverse Point Port to Point Distance (in.) 1 341.3 2 304.9 3 251.3 4 105.6 5 52.3 6 15.5
Duct diameters upstream from flow disturbance (A): >12 Limit: 0.5 Duct diameters downstream from flow disturbance (B): >3 Limit: 2.0

Figure 3-1: Unit 1 and Unit 2 Sampli ng Point Determination (EPA Method 1)

End of Section 3 – Description of Installation

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

METHODOLOGY 4-1

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### Clean Air Engineering followed procedures as detailed in EPA Methods 1, 3A, 25A, and 320. The following table summarizes the methods and their respective sources.

Table 4-1: Summary of Sampling Procedures

Title 40 CFR Part 60 Appendix A Method 1 “Sample and Velocity Trav erses for Stationary Sources” Method 3A “Determination of Oxygen and Carbon Dioxide Concentrations in Emissions from Stationary Sources (Instrum ental Analyzer Procedure)” Method 25A “Determination of Total Gaseous Organic Concentration Using a Flame Ionization Analyzer”

Title 40 CFR Part 63 Appendix A Method 320 “Measurement of Vapor Phase Organic and Inorganic Emissions by Extractive Fourier Transform Infrared (FTIR) Spectroscopy”

ICR Alternative Methods Method 320 “Measurement of Vapor Phase Organic and Inorganic Emissions by Extractive Fourier Transform Infrared (FTIR) Spectroscopy – (Moisture Content of Stack Gas, Carbon Monoxide, Methane)



### These methods appear in detail in Title 40 of the Code of Federal Regulations (CFR) and on the World Wide Web at http://www.cleanair.com.

Diagrams of the sampling apparatus and major specifications of the sampling, recovery and analytical procedures are summarized for each method in Appendix A.

CleanAir followed specific quality assurance and quality control (QA/QC) procedures as outlined in the individual methods and in EPA “Quality Assurance Handbook for Air Pollution Measurement Systems: Volume III Stationary Source-Specific Methods”, EPA/600/R-94/038C. Additional QA/QC methods, as prescribed in CleanAir’s internal Quality Manual, were also followed. Results of all QA/QC activities performed by CleanAir are summarized in Appendix D.

End of Section 4 – Methodology 

### 4 Methodology

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

APPENDIX 5-1

Revision 0, Final TEST METHOD SPEC IFICATIONS ....................................................................................A SAMPLE CALCUL ATIONS..................................................................................................B PARAMETERS ....................................................................................................................C QA/QC DATA..................................................................................................................... ..D FIELD DATA PR INTOUTS ..................................................................................................E PLANT DATA..................................................................................................................... ..F FUEL ANALYSIS ................................................................................................................ G PROTOC OL....................................................................................................................... ..H RESUMES ........................................................................................................................ .... I 

### 5 A ppendix

### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

Revision 0, Final 

### A TEST METHOD SPECIFICATIONS

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### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

Revision 0, Final 

### B SAMPLE CALCULATIONS

# This Page Intentionally Left BlankRE East Kentucky Power Cooperative Dale Station - EPA Section 114 Response Clarification.txt From: Bob Preksta [bpreksta@cleanair.com] Sent: Friday, March 04, 2011 8:51 AM To: 'Kevin Moore' Cc: Bullock, David; 'Jerry Purvis'; 'Louis Petrey'; 'Shamblin, Penny' Subject: RE: East Kentucky Power Cooperative, Dale Station - EPA Section 114 Response Clarification Attachments: HCL Results Unit 4 HCL.PDF

Dear Mr. Bullock,

Please accept this email as permission to include the enclosed two-page document in the EPA docket. Feel free to contact me if you need any additional documentation.

Best Regards,

Bob

Robert A. Preksta Sr. Project Manager (412) 787-9130 ext.224 (Office New) (412) 480-6047 Mobile bpreksta@cleanair.com

This message contains information that may be confidential or privileged and is intended for the addressee. Any disclosure, dissemination, distribution or copying of this communication by persons other than the addressee is strictly prohibited. If you have received this message in error, please advise the sender by reply e-mail and delete all copies of this message and its attachments
From: Kevin Moore [mailto:kevin.moore@ekpc.coop] Sent: Friday, March 04, 2011 8:00 AM To: bpreksta@cleanair.com Cc: dbullock@rti.org; Jerry Purvis; Louis Petrey Subject: FW: East Kentucky Power Cooperative, Dale Station - EPA Section 114 Response Clarification

Bob, Could you please send an e-mail to Mr. David Bullock allowing the attached data (Spurlock Station Unit 4) to be included in the EPA docket. I appreciate your help and please let me know if you have any questions or need additional information.

Thank you,

Kevin Moore Environmental Engineer Office: 859-745-9241 Cell: 859-771-7424 e-mail: kevin.moore@ekpc.coop

From: Jerry Purvis Sent: Thursday, March 03, 2011 7:47 AM To: Kevin Moore; Louis Petrey; 'roberson@rmb-consulting.com' Cc: 'pshamblin@hunton.com' Subject: Fw: East Kentucky Power Cooperative, Dale Station - EPA Section 114 Response Clarification

Here is the request. Page 1RE East Kentucky Power Cooperative Dale Station - EPA Section 114 Response Clarification.txt

Thank you
From: Bullock, David [mailto:dbullock@rti.org] Sent: Tuesday, February 22, 2011 10:38 AM To: Jerry Purvis Cc: Bullock, David <dbullock@rti.org> Subject: East Kentucky Power Cooperative, Dale Station - EPA Section 114 Response Clarification

Mr. Purvis,

I am an employee of RTI International, the contractor assisting EPA with the development of the EGU NESHAP. We have processed the responses to the Electric Utilities (EGU) Information Collection Request (ICR). We are currently assembling files for the EPA docket.

As part of the East Kentucky Power Cooperative Inc. response to the EGU ICR for Dale
Station, your company provided a PDF file: HCL Results Unit 4 HCL.pdf (a copy of the file is attached for your convenience).

This is a two-page file containing a summary of emission test results. The pages include a footer indicating that this information is copyrighted by Clean Air Engineering, Inc. EPA is prohibited from including copyrighted information in the docket.

Will you please contact Clean Air Engineering to obtain a release of this information? We simply need an email from them giving their permission for this two-page summary to be included in the EPA docket.

I appreciate your prompt attention to this matter.

Regards,

David

David Bullock, QEP RTI International 3040 Cornwallis Road (800Pk-E306) Research Triangle Park, NC 27709 Telephone: 919.485.2633 Facsimile: 919.541.7155 Email: dbullock@rti.org www.rti.org

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### NRG TEXAS POWER LLC Client Reference No: 90838 LIMESTONE GENERATING STATION CleanAir Project No: 10964

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### D QA/QC DATA

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### E FIELD DATA PRINTOUTS

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### I RESUMES

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