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 OVERVIEW.....................................................................................................1-1

INTRODUCTION ..............................................................................................................1-1

Key Project Participants ...............................................................................................1-1

Test Program Parameters ............................................................................................1-1

TEST PROGRAM SYNOPSIS..........................................................................................1-2

Test Schedule...............................................................................................................1-2

Table 1-1: Schedule of Activities ............................................................................................1-2

Results Summary .........................................................................................................1-3

Table 1-2: Summary of Test Results......................................................................................1-3

Discussion of Test Program .........................................................................................1-4

2 RESULTS .........................................................................................................................2-1

Table 2-1: Unit 1 – Fuel Analysis...........................................................................................2-1

Table 2-2: Unit 1 – Total Hydrocarbons.................................................................................2-2

Table 2-3: Unit 1 – Formaldehyde, Methane, Carbon Monoxide ...........................................2-3

Table 2-4: Unit 2 – Fuel Analysis...........................................................................................2-4

Table 2-5: Unit 2 – Total Hydrocarbons.................................................................................2-5

Table 2-6: Unit 2 – Formaldehyde, Methane, Carbon Monoxide ...........................................2-6

3 DESCRIPTION OF INSTALLATION................................................................................3-1

PROCESS DESCRIPTION...............................................................................................3-1

DESCRIPTION OF SAMPLING LOCATIONS..................................................................3-2

Table 3-1: Sampling Points ....................................................................................................3-2

Figure 3-1: Unit 1 and Unit 2 Sampling Point Determination (EPA Method 1)........................3-3

4 METHODOLOGY .............................................................................................................4-1

Table 4-1: Summary of Sampling Procedures........................................................................4-1

5 APPENDIX........................................................................................................................5-1

TEST METHOD SPECIFICATIONS ....................................................................................A

SAMPLE CALCULATIONS..................................................................................................B

PARAMETERS ....................................................................................................................C

QA/QC DATA.......................................................................................................................D

FIELD DATA PRINTOUTS ..................................................................................................E

PLANT DATA.......................................................................................................................F

FUEL ANALYSIS ................................................................................................................ G

PROTOCOL.........................................................................................................................H

RESUMES ............................................................................................................................ I
NRG TEXAS POWER LLC Client Reference No: 90838 

LIMESTONE GENERATING STATION CleanAir Project No: 10964 

PROJECT OVERVIEW 1-1 

Revision 0, Final 

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 (O2) 

• carbon dioxide (CO2) 

• carbon monoxide (CO) 

• methane (CH4) 

• 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 

Revision 0, Final 

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 

Revision 0, Final 

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

Formaldehyde lb/MMBtu EPA 320 <0.00006 *

ppmdv @ 7%O2 <0.051 *

Methane lb/MMBtu EPA 320 0.0003

ppmdv @ 7%O2 0.382

Carbon Monoxide lb/MMBtu EPA 320 0.021

ppmdv @ 7%O2 17.0

Total Hydrocarbons lb/MMBtu EPA 25A 0.00003

ppmdv @ 7%O2 0.019

O2 % dv EPA 3A 5.1

CO2 % dv EPA 3A 14.5

H2O % EPA 320 18.6

Unit 2 Stack

Formaldehyde lb/MMBtu EPA 320 <0.00006 *

ppmdv @ 7%O2 <0.051 *

Methane lb/MMBtu EPA 320 <0.00004 *

ppmdv @ 7%O2 <0.061 *

Carbon Monoxide lb/MMBtu EPA 320 0.025

ppmdv @ 7%O2 21.5

Total Hydrocarbons lb/MMBtu EPA 25A 0.00012

ppmdv @ 7%O2 0.073

O2 % dv EPA 3A 5.0

CO2 % dv EPA 3A 14.7

H2O % EPA 320 19.1

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

Sampling 

Method

Average 

Units Emission
NRG TEXAS POWER LLC Client Reference No: 90838 

LIMESTONE GENERATING STATION CleanAir Project No: 10964 

PROJECT OVERVIEW 1-4 

Revision 0, Final 

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 Infrared (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 (O2, CO2, 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 collected 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 

Revision 0, Final 

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

Fd Dry F-factor (scf/MBtu) 10,209 10,224 10,179 10,204

Fw Wet F-factor (scf/MBtu) 11,875 11,875 11,845 11,865

Fc Carbon F-factor (scf/MBtu) 1,954 1,966 1,942 1,954

Maximum Possible Sulfur Dioxide Emission Rate

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

Predicted Gross Calorific Value

GCVp 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 concentration 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

CSF6 SF6 Concentration in Bottle (ppm) 5.10 5.10 5.10

Cform Formaldehye Concentration in Bottle (ppm) 10.00 10.00 10.00

CCO CO Concentration in Bottle (ppm) 47.40 47.40 47.40

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

Run Data

FormOut Formaldehyde (ppmwv) <0.0500 <0.0500 <0.0500 <0.0500

MethOut Methane (ppmwv) 0.363 0.395 0.370 0.376

COOut Carbon Monoxide (ppmwv) 20.9 16.0 14.1 17.0

O2Out Oxygen (%) 5.0 5.1 5.1 5.1

H2OOut Moisture (%) 18.55 18.47 18.64 18.55

Results

FormOut Formaldehyde (ppmdv) <0.0614 <0.0613 <0.0615 <0.0614

FormOut Formaldehyde (ppmdv %7% O2) <0.0438 <0.0540 <0.0541 <0.0506

FormOut Formaldehyde (lb/MMBtu) <0.00006 <0.00007 <0.00006 <0.00006

MethOut Methane (ppmdv) 0.446 0.485 0.455 0.462

MethOut Methane (ppmdv %7% O2) 0.318 0.427 0.401 0.382

MethOut Methane (lb/MMBtu) 0.0002 0.0003 0.0003 0.0003

COOut Carbon Monoxide (ppmdv) 25.7 19.7 17.4 20.9

COOut Carbon Monoxide (ppmdv %7% O2) 18.3 17.3 15.3 17.0

COOut Carbon Monoxide (lb/MMBtu) 0.025 0.020 0.017 0.021

“<” Indicates the analyte concentration 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

Fd Dry F-factor (scf/MBtu) 10,052 9,787 9,990 9,943

Fw Wet F-factor (scf/MBtu) 11,730 11,484 11,648 11,621

Fc Carbon F-factor (scf/MBtu) 1,937 1,909 1,920 1,922

Maximum Possible Sulfur Dioxide Emission Rate

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

Predicted Gross Calorific Value

GCVp 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 concentration 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

CSF6 SF6 Concentration in Bottle (ppm) 5.10 5.10 5.10

Cform Formaldehye Concentration in Bottle (ppm) 10.00 10.00 10.00

CCO CO Concentration in Bottle (ppm) 47.40 47.40 47.40

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

Run Data

FormOut Formaldehyde (ppmwv) <0.0500 <0.0500 <0.0500 <0.0500

MethOut Methane (ppmwv) 0.036 -0.067 -0.133 -0.054

COOut Carbon Monoxide (ppmwv) 21.4 23.3 19.1 21.3

O2Out Oxygen (%) 5.0 5.1 5.0 5.0

H2OOut Moisture (%) 19.02 19.12 19.26 19.14

Results

FormOut Formaldehyde (ppmdv) <0.0617 <0.0618 <0.0619 <0.0618

FormOut Formaldehyde (ppmdv %7% O2) <0.0437 <0.0542 <0.0542 <0.0507

FormOut Formaldehyde (lb/MMBtu) <0.00006 <0.00006 <0.00006 <0.00006

MethOut Methane (ppmdv) 0.045 -0.082 -0.164 -0.067

MethOut Methane (ppmdv %7% O2) 0.031 -0.072 -0.144 -0.061

MethOut Methane (lb/MMBtu) 0.0000 0.0000 -0.0001 0.0000

COOut Carbon Monoxide (ppmdv) 26.5 28.8 23.6 26.3

COOut Carbon Monoxide (ppmdv %7% O2) 18.7 25.2 20.7 21.5

COOut Carbon Monoxide (lb/MMBtu) 0.025 0.027 0.023 0.025

“<” Indicates the analyte concentration 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 

Revision 0, Final 

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 (SO2) 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 

Revision 0, Final 

DESCRIPTION OF SAMPLING LOCATIONS 

Sampling point locations were determined according to EPA Method 1. 

Table 3-1 outlines the sampling point configurations. 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

O2 EPA 3A 1-3 4 3 10 120 3-1

CO2 EPA 3A 1-3 4 3 10 120 3-1

THC EPA 25A 1-3 4 3 10 120 3-1

H2CO EPA 320 1-3 4 3 10 120 3-1

CH4 EPA 320 1-3 4 3 10 120 3-1

CO EPA 320 1-3 4 3 10 120 3-1

Unit 2 Stack

O2 EPA 3A 1-3 4 3 10 120 3-1

CO2 EPA 3A 1-3 4 3 10 120 3-1

THC EPA 25A 1-3 4 3 10 120 3-1

H2CO EPA 320 1-3 4 3 10 120 3-1

CH4 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 

Method Minutes Figure

Run 

No.

Points per 

Ports Port
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 Sampling 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 Traverses for Stationary Sources” 

Method 3A “Determination of Oxygen and Carbon Dioxide Concentrations in Emissions from 

Stationary Sources (Instrumental 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 

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TEST METHOD SPECIFICATIONS ....................................................................................A

SAMPLE CALCULATIONS..................................................................................................B

PARAMETERS ....................................................................................................................C

QA/QC DATA.......................................................................................................................D

FIELD DATA PRINTOUTS ..................................................................................................E

PLANT DATA.......................................................................................................................F

FUEL ANALYSIS ................................................................................................................ G

PROTOCOL.........................................................................................................................H

RESUMES ............................................................................................................................ I

5 Appendix 
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TEST METHOD SPECIFICATIONS A 

A - 1
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A - 2
A - 3
A - 4
A - 5
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 A - 6 

End of Appendix 
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SAMPLE CALCULATIONS B 

B - 1
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B - 2
RE 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 1
RE 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 

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