July 27, 2005

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting for Period January 1, 2005 through June 30, 2005

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period January 1, 2005 through June 30, 2005.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental and Safety Leader, John Merrels at (770) 969-2916.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning – Fairburn PlantReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : January 1, 2005 through June 30, 2005

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of procedures outlined in the facility OMM/SSM Plans:

None

All instances of startup, shutdown and malfunction were dealt with in accordance with the facility Startup, Shutdown, and Malfunction Pla n

.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2005 through June 30, 2005

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

<TABLE 1>

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature<TABLE 2>

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

<TABLE 3>

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period January 1, 2005 through June 30, 200 5 the operating hours are:

FG1 Furnace – 4344 hours

FG1 Line – 4206 hours

FG2 Furnace – 4344 hours

FG2 Line – 4201 hours

FG3 Furnace – 4344 hours

FG3 Line – 4130 hoursDeviations :

FG-1 LOI 4 hrs 0.04 % deviation

FG-2 LOI 6 hrs 0.14 % deviation

FG-1 Furnace Crust 0.75 hrs 0.02 % deviation

FG-2 Furnace Crust 1.25 hrs 0.03 % deviation

FG-3 Furnace Crust 12.42 hrs 0.29 % deviation

Based on the plant operating hours, none of the mon itoring parameters exceedance times were greater than 1%.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2005 through June 30, 2005

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

No instances of monitored parameter deviations were determined to be beyond the 1% trigger level for this report.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderJanuary 27, 2006

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting for Period July 1, 2005 through December 31, 2005

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period July 1, 2005 through December 31, 2005.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental and Safety Leader, John Merrels at (770) 969-2916.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning – Fairburn PlantReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : July 1, 2005 through December 31, 2005

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of procedures outlined in the facility Startup, Shutdown, and Malfunction (SSM) Plan.

The FG2 incinerator was down for 0.33 hours on Octo ber 5, 2005 and 11.12 hours on December 24, 2005. The line continued to run wi th product during these periods. The SSM Plan states that once it is deter mined that an incinerator is not operating and cannot be restarted by an electrician , the line production must be suspended until the problem is resolved. This proc edure was not followed during the periods of incinerator malfunction.

All other instances of startup, shutdown and malfun ction were dealt with in accordance with the facility SSM Plan.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

There are no instances being reported as a deviatio n of procedures outlined in the facility

OMM Plan.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2005 through December 31, 2005

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

<TABLE 1>

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature<TABLE 2>

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

<TABLE 3>

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period July 1, 2005 through December 31, 20 05 the operating hours are:

FG1 Furnace – 4416 hours

FG1 Line – 4199 hours

FG2 Furnace – 4416 hours

FG2 Line – 4270 hours

FG3 Furnace – 4416 hours

FG3 Line – 4296 hoursDeviations :

FG1 Incinerator 1.35 hrs 0.03 % deviation

FG2 Incinerator 11.98 hrs 0.28 % deviation

FG3 Incinerator 2.57 hrs 0.06 % deviation

FG1 Furnace Crust 107.00 hrs 2.42 % deviation

FG1 Batch Wetting 20.00 hrs 0.45 % deviation FG2 Batch Wetting 4.00 hrs 0.09 % deviation FG3 Batch Wetting 4.00 hrs 0.09 % deviation

FG1 LOI 1.50 hrs 0.04 % deviation

FG2 LOI 10.75 hrs 0.25 % deviation

FG3 LOI 2.25 hrs 0.05 % deviation

Based on these operating hours, the following monit oring parameter was over the 1%

exceedance time:

FG1 Furnace Crust 107.00 hrs 2.42 % deviation

This instance will be described in more detail in t he Parameter Exceedance Report that

follows.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2005 through December 31, 2005

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

FG1 Furnace Crust Deviation – Appendix A

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant Leader

## APPENDIX A

FG1 Furnace Crust DeviationGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2005 – December 31, 2005

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

FG1 Furnace Crust Deviations :

During the reporting period, there were 107 hours o f reported FG1 Furnace Lost Crust deviation. This time was required to perform speci alized maintenance to the furnace structure. During this time batch feeding and glas s pull from the furnace was temporarily suspended.

The table below summarizes the FG1 Furnace Crust De viations:

FG-1 Furnace Crust Summary Owens Corning Fairburn, Georgia

FG-1 Furnace Crust Beginning Date & Time Ending Date & Time Total Time

9/18/05 22:00 9/23/05 09:00 107 hoursJuly 26, 2006

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting for Period January 1, 2006 through June 30, 2006

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period January 1, 2006 through June 30, 2006.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental and Safety Leader, John Merrels at (770) 969-2916.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning – Fairburn PlantReport: Periods of Startup, Shutdown, and Malfunction Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : January 1, 2006 through June 30, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

All instances of startup, shutdown and malfunction were dealt with in accordance with the facility Startup, Shutdown, and Malfunction Pla n.

Report: Periods of Deviation from the Operations, Maintenan ce and Monitoring (OMM)

Plan 40 CFR 63 Subpart NNN

There are no instances being reported as a deviatio n of procedures outlined in the facility

OMM Plan.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2006 through June 30, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period January 1, 2006 through June 30, 200 6 the operating hours are:

FG1 Furnace – 4344 hours

FG1 Line – 4245 hours

FG2 Furnace – 3024 hours

FG2 Line – 2660 hours

FG3 Furnace – 4344 hours

FG3 Line – 4101 hoursDeviations :

FG2 Batch Wetting 48 hrs 1.59 % deviation FG3 Batch Wetting 56 hrs 1.29 % deviation

FG3 Furnace Crust 40.25 hrs 0.93 % deviation

Based on these operating hours, the following monit oring parameter was over the 1%

exceedance time:

FG2 Batch Wetting 48 hrs 1.59 % deviation FG3 Batch Wetting 48 hrs 1.29 % deviation

These instances will be described in more detail in the Parameter Exceedance Report that

follows.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2006 through June 30, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

FG2 Batch Wetting – See Appendix A FG3 Batch Wetting – See Appendix B

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant Leader

## APPENDIX A

FG2 Batch Wetting DeviationsGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2006 – June 30, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

FG2 Batch Wetting Deviations :

During the reporting period, there were 48 hours of reported Batch Wetting deviation. The hours of deviation were due to operating the ov erhead feeding system.

The table below summarizes the FG2 Batch Wetting De viations:

FG2 Batch Wetting Deviation Owens Corning Fairburn, GA January 1, 2006 to June 30, 2006

Deviation Start Time Deviation End Time Total Devia tion (hrs)

4/28/06 @ 9:00 4/30/06 @ 9:00 48

## APPENDIX B

FG3 Batch Wetting DeviationsGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2006 – June 30, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

FG3 Batch Wetting Deviations :

During the reporting period, there were 56 hours of reported Batch Wetting deviation.

The total hours of deviation consisted of 8 hours o f low water flow and 48 hours of operating the overhead feeding system.

The table below summarizes the FG3 Batch Wetting De viations:

FG3 Batch Wetting Deviation Owens Corning Fairburn, GA January 1, 2006 to June 30, 2006

Deviation Start Time Deviation End Time Total Devia tion (hrs)

4/5/06 @ 8:00 4/7/06 @ 8:00 48

4/12/06 @ 11:00 4/12/06 @ 19:00 8January 29, 2007

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting for Period July 1, 2006 through December 31, 2006

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period July 1, 2006 through December 31, 2006.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental and Safety Leader, John Merrels at (770) 969-2916.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning – Fairburn PlantReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : July 1, 2006 through December 31, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

Although there were startups, shutdowns and malfunc tions during this reporting period,

all actions taken were consistent with the SSM Plan

.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

There are no instances being reported as a deviatio n of procedures outlined in the facility OMM plan.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2006 through December 31, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period July 1, 2006 through December 31, 20 06 the operating hours are:

FG1 Furnace – 8760 hours

FG1 Line – 8441 hours

FG2 Furnace – 7224 hours

FG2 Line – 6776 hours

FG3 Furnace – 8760 hours

FG3 Line – 8216 hoursDeviations :

FG1 Batch Wetting 1.5 hrs 0.02 % deviation

Based on the plant operating hours, none of the mon itoring parameters exceedance times were greater than 1%.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2006 through December 31, 2006

Owens Corning – Fairburn Plant

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

No instances of monitored parameter deviations were determined to be beyond the 1% trigger level for this report.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - FAIRBURN
700 MCLARIN ROAD FAIRBURN, GEORGIA 30213

July 27, 2007

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting for Period January 1, 2007 through June 30, 2007

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period January 1, 2007 through June 30, 2007.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental and Safety Leader, John Merrels at (770) 969-2916.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning Insulating Systems, LLC – FairburnReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : January 1, 2007 through June 30, 2007

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

Although there were startups, shutdowns and malfunc tions during this reporting period,

all actions taken were consistent with the SSM Plan

.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

There are no instances being reported as a deviatio n of procedures outlined in the facility

OMM Plan.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2007 through June 30, 2007

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period January 1, 2007 through June 30, 200 7 the operating hours are:

FG1 Furnace – 4344 hours

FG1 Line – 4184 hours

FG2 Furnace – 4344 hours

FG2 Line – 4056 hours

FG3 Furnace – 4344 hours

FG3 Line – 4034 hoursDeviations :

FG1 Batch Wetting 2.5 hrs 0.06 % deviation FG2 Batch Wetting 24.0 hrs 0.55 % deviation FG3 Batch Wetting 8.0 hrs 0.18 % deviation

High LOI 20.7 hrs 0.51 % deviation

Based on the plant operating hours, none of the mon itoring parameters exceedance times were greater than 1%.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2007 through June 30, 2007

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

No instances of monitored parameter deviations were determined to be beyond the 1% trigger level for this report.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - FAIRBURN
700 MCLARIN ROAD FAIRBURN, GEORGIA 30213

January 30, 2008

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting - July 1 through Dec ember 31, 2007

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period July 1 through December 31, 2007.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental and Safety Leader, John Merrels at (770) 969-2916.

Sincerely,

Dennis Rogers

Plant Leader Owens Corning Insulating Systems, LLC – FairburnReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : July 1 through December 31, 2007

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

Although there were startups, shutdowns and malfunc tions during this reporting period,

all actions taken were consistent with the SSM Plan

.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

There are no instances being reported as a deviatio n of procedures outlined in the facility

OMM Plan.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : July 1 through December 31, 2007

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period July 1 through December 31, 2007the operating hours are:

FG1 Furnace – 3312 hours

FG1 Line – 3167 hours

FG2 Furnace – 4416 hours

FG2 Line – 4167 hours

FG3 Furnace – 4416 hours

FG3 Line – 4162 hoursDeviations :

FG1 Batch Wetting 1.25 hrs 0.04 % deviation FG2 Batch Wetting 0.33 hrs 0.01 % deviation

FG2 High LOI 15.83 hrs 0.38 % deviation

FG1 Lost Furnace Crust 11.50 hrs 0.35 % deviation

FG2 Incinerator 0.52 hrs 0.01% deviation

Based on the plant operating hours, none of the mon itoring parameters exceedance times were greater than 1%.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1 through December 31, 2007

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

No instances of monitored parameter deviations were determined to be beyond the 1% trigger level for this report.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderJuly 30, 2008

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting - January 1 through June 30, 2008

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period January 1 through June 30, 2008.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental Leader, John Merrels at (770) 969-2916.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning Insulating Systems, LLC – FairburnReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : January 1 through June 30, 2008

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

Although there were startups, shutdowns and malfunc tions during this reporting period,

all actions taken were consistent with the SSM Plan

.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

There are no instances being reported as a deviatio n of procedures outlined in the facility

OMM Plan.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : January 1 through June 30, 2008

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period January 1 through June 30, 2008 the operating hours are:

FG1 Furnace – 4368 hours

FG1 Line – 4115 hours

FG2 Furnace – 4368 hours

FG2 Line – 3922 hours

FG3 Furnace – 4368 hours

FG3 Line – 3798 hoursDeviations :

FG1 Batch Wetting 9.5 hrs 0.22 % deviation FG2 Batch Wetting 24.5 hrs 0.56 % deviation FG3 Batch Wetting 9.5 hrs 0.22 % deviation

FG1 High LOI 5.38 hrs 0.13 % deviation FG2 High LOI 31.3 hrs 0.80 % deviation

FG3 Lost Furnace Crust 7.25 hrs 0.17 % deviation

Based on the plant operating hours, none of the mon itoring parameters exceedance times were greater than 1%.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1 through June 30, 2008

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

No instances of monitored parameter deviations were determined to be beyond the 1% trigger level for this report.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC

7000 McLarin Rd Fairburn, GA 30213

Ph: 770-964-9811

January 12, 2009

Mr. Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting Owens Corning Insulating Systems, LLC July 1 through December 31, 2008

Dear Mr. Sanon:

Please find enclosed two copies of the MACT Semi-An nual Report for our Fairburn, Georgia facility. One copy is marked “Public Version” and is intended for our public file. The other is

marked “Confidential Version” and should be treated as confidential. Each copy includes three separate reports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startup, shutdown, and malfunction where actions taken were inconsistent with the plan in accordance with MACT requirements, 40 CFR 6 3.10(d)(5) and 40 CFR 63.1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63 .10(e)(3) and 40 CFR 63.1386(e) if monitored parameters deviate more than 1% of the to tal operating time. Each report is labeled appropriately and is for the period July 1 through December 31, 2008.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contact our Envi ronmental Leader, Ryan Ponting, at (770) 969-

2916.

Sincerely,

Dennis Rogers

Plant Leader Owens Corning Insulating Systems, LLC – Fairburn, G AReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : July 1 through December 31, 2008

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

Although there were startups, shutdowns and malfunc tions during this reporting period,

all actions taken were consistent with the SSM Plan

.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

Based on the requirements within the OMM Plan, a LO I check is required every eight hours on each manufacturing line that manufactures MACT products. There were a total

of nine instances where the duration between LOI te sting exceeded eight hours.

Based on the requirements within the OMM Plan for L OI testing, if a sample is taken where the LOI sample exceeds the maximum set by tes ting, facility personnel are required to retest “as soon as is practicable.” Th ere were two occurrences when the retests were not conducted in a timely fashion.

Based on the requirements within the OMM Plan for d ensity testing, a density check is required every eight hours on each manufacturing li ne that manufactures MACT products. There were a total of 17 instances where the duration between density testing exceeded eight hours.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : July 1 through December 31, 2008

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period July 1 through December 31, 2008 the operating hours are:

FG1 Furnace – 4416 hours

FG1 Line – 3969 hours

FG2 Furnace – 4416 hours

FG2 Line – 3951 hours

FG3 Furnace – 4416 hours

FG3 Line – 3763 hoursDeviations :

FG2 Incinerator Low Temp 0.35 hrs 0.01 % deviation FG3 Incinerator Low Temp 0.59 hrs 0.02 % deviation

FG1 Batch Wetting 4.25 hrs 0.10 % deviation FG3 Batch Wetting 3.0 hrs 0.07 % deviation

FG1 High LOI 6.08 hrs 0.15 % deviation FG2 High LOI 26.63 hrs 0.67 % deviation

FG1 Lost Furnace Crust 62.0 hrs 1.40 % deviation

The FG1 lost furnace crust instances will be descri bed in additional detail in the Parameter Exceedance Report that follows (Appendix A).

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, through December 31, 2008

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

FG1 Lost Furnace Crust – See Appendix A.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant Leader

## APPENDIX A

FG1 Lost Furnace Crust DeviationsGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1 – December 31, 2008

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

FG1 Lost Furnace Crust Deviations :

During the reporting period, there were 62.0 hours of reported lost furnace crust deviations. Furnace was on a hot idle during a MA CT downtime to conduct annual inspection and perform routine maintenance. At thi s time additional maintenance was performed on the forehearth channel to address glas s delivery issues. These maintenance activities required the hot idle to be extended.

The table below summarizes the FG1 Lost Furnace Cru st Deviation:

FG1 Lost Furnace Crust Deviation Owens Corning Insulating Systems, LLC

Fairburn, GA July 1, 2008 to December 31, 2008

Deviation Start Time Deviation End Time Total Devia tion (hrs)

10/13/08 @ 03:00 10/15/08 @ 17:00 62July 30, 2009

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting - January 1 through June 30, 2009

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period January 1 through June 30, 2009.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental Leader, Rick Darr at (770) 969-2931.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning Insulating Systems, LLC – FairburnReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : January 1 through June 30, 2009

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

Although there were startups, shutdowns and malfunc tions during this reporting period,

all actions taken were consistent with the SSM Plan

.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

The following instances are being reported as a dev iation of procedures outlined in the facility OMM Plan.

1. Based on requirements within the Operations, Mainte nance, and Monitoring Plan, an LOI is required at least once every 8 hours on e ach manufacturing line that manufactures MACT products. For the operating manu facturing lines there were

a total of 3 incidents where the duration between LOI testing e xceeded eight

hours

2. Based on requirements within the Operations, Mainte nance, and Monitoring Plan, a density check is required at least once every 8 h ours on each manufacturing line that manufactures MACT products. There were a tota l of 83 incidents where the duration between density testing exceeded eight hou rs.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : January 1 through June 30, 2009

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period January 1 through June 30, 2009 the operating hours are:

FG1 Furnace – 456 hours

FG1 Line – 173 hours

FG2 Furnace – 4368 hours

FG2 Line – 3738 hours

FG3 Furnace – 1944 hours

FG3 Line – 1834 hoursDeviations :

FG2 Batch Wetting 72.0 hrs 1 .56 % deviation

FG2 High LOI 4.0 hrs 0.11 % deviation

FG2 Lost Furnace Crust 3.17 hrs 0.08 % deviatio n

Based on the plant operating hours, only the FG2 Ba tch Wetting was over the 1%

deviation time.

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1 through June 30, 2009

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

FG2 Furnace – Batch Wetting: See Appendix A for de tails

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant Leader

## APPENDIX A

FG2 Batch WettingGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : January 1 through June 30, 2009

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

FG2 Batch Wetting Deviations :

For the first half of 2009 there were a total of 72 .0 hours during the referenced time period when FG2 Batch Wetting deviated from the lim it established by the original FG2 MACT compliance testing.

The table below lists dates and times for the FG2 B atch Wetting deviations during the referenced time period.

FG2 Batch Wetting Deviations Summary

Owens Corning Insulating Systems

Fairburn, Georgia

Beginning Date & Time Ending Date & Time Total Time

2/20/09 06:00 2/23/09 06:00 72 hrsOWENS CORNING INSULATING SYSTEMS, LLC - FAIRBURN
700 MCLARIN ROAD FAIRBURN, GEORGIA 30213

January 29, 2010

Pierre Sanon Environmental Engineer Stationary Source Compliance Program Georgia Department of Natural Resources Environmental Protection Division, Air Protection B ranch 4244 International Parkway, Suite 120 Atlanta, Georgia 30354

RE: MACT Semi-Annual Reporting - July 1 through Dec ember 31, 2009

Dear Mr. Sanon,

Please find enclosed two complete copies of the MAC T Semi-Annual Report for our Fairburn, Georgia facility. One copy is marked “Pu blic Version” and is intended for our public file. The other is marked “Confidential Ver sion” and should be treated as confidential. Each copy includes three separate re ports as required by 40 CFR 63 Subparts A and NNN. The first report summarizes pe riods of startup, shutdown, and

malfunction where actions taken were inconsistent w ith the plan in accordance with MACT requirements, 40 CFR 63.10(d)(5) and 40 CFR 63 .1386(c). The second report is the “Summary Report – Gaseous and Opacity Excess Em ission and Continuous Monitoring System Performance” as required in 40 CF R 63.10(e)(3) and 40 CFR 63.1386(e). The third report is the “Gaseous and O pacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.1386(e) if monitored parameters devia te more than 1% of the total operating time. Each report is labeled appropriate ly and is for the period July 1 through December 31, 2009.

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contac t our Facility Environmental Leader, Nadia Holloway at (770) 969-2914.

Sincerely,

Dennis Rogers Plant Leader, Owens Corning Insulating Systems, LLC – FairburnReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : July 1 through December 31, 2009

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

Although there were startups, shutdowns and malfunc tions during this reporting period,

all actions taken were consistent with the SSM Plan

.

Report: Periods of Deviation from the Operations, M aintenance and Monitoring (OMM) Plan 40 CFR 63 Subpart NNN

The following instances are being reported as a dev iation of procedures outlined in the facility OMM Plan.

1. Based on requirements within the OMM Plan, an LOI i s required at least once every 8 hours on each manufacturing line that manuf actures MACT products. The following deviations from the OMM Plan occurred :

• FG1 LOI Check Exceeded 8-hrs 1 time

• FG2 LOI Check Exceeded 8-hrs 6 times

2. Based on requirements within the OMM Plan, a densit y check is required at least once every 8 hours on each manufacturing line that manufactures MACT products. The following deviations from the OMM Pl an occurred:

• FG1 Density Check Exceeded 8-hrs 1 time

• FG2 Density Check Exceeded 8-hrs 3 times

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40CFR63 Subpart NNN

Reporting Period : July 1 through December 31, 2009

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

HAP’s Monitored : The Wool Fiberglass MACT focuses on two surrogat e pollutants for control of HAP’s from the Fiberglass manufacturing process. Particulate matter is limited to 0.5 lb PM per ton of molten glass produc ed from the glass melting process and formaldehyde is limited to 1.2 lb per ton of molten glass produced during fiber forming and curing.

Process Units : In general the fiberglass manufacturing process is composed of a glassmelting furnace that melts batch materials into gla ss. The molten glass is passed through a rotary spin (RS) forming process where a fine, gl ass fiber is produced. Binder is applied to the fiber as it forms a “pack” on the su rface of a foraminous conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 through 3 defi ne the manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

FG1

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control

Device Monitored Parameter

FG2

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

TABLE 3

Process Control

Device Monitored Parameter

FG3

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

For the period July 1 through December 31, 2009 the operating hours are:

FG1 Furnace – 4253 hours

FG1 Line – 3188 hours

FG2 Furnace – 4380 hours

FG2 Line – 3793 hours

FG3 Furnace – 0 hours

FG3 Line – 0 hoursDeviations :

FG1 Batch Wetting 144.00 hrs 3.39 % deviation FG2 Batch Wetting 241.92 hrs 5.52 % deviation

FG1 High LOI 3.92 hrs 0.12 % deviation FG2 High LOI 27.28 hrs 0.72 % deviation

FG2 Lost Furnace Crust 0.50 hrs 0.00 % deviation

FG1 Incinerator Offline 0.66 hrs 0.02% deviation

FG2 Incinerator Offline 0.35 hrs 0.01% deviation

Based on the plant operating hours, none of the mon itoring parameters exceedance times were greater than 1% with the exception of the foll owing:

FG1 Batch Wetting 144.00 hrs 3.39 % deviation FG2 Batch Wetting 241.92 hrs 5.52 % deviation

These instances will be described in more detail in the Parameter Exceedence Report that

follows.

Based on these percentages of deviations, the follo wing monitoring parameters were over 5% exceedence time, thus warranting a Quality Impro vement Plan (QIP) per 63.138(b)(2)(ii) and 63.10(e)(3)(viii):

FG2 Batch Wetting 5.52 % deviation

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1 through December 31, 2009

Owens Corning Insulating Systems, LLC - Fairburn

7000 McLarin Road Fairburn, GA 30213

The following instances are being reported as a dev iation of a monitored parameter due to malfunction or startup/shutdown:

FG1 Batch Wetting 144.00 hrs 3.39 % deviation FG2 Batch Wetting 241.92 hrs 5.52 % deviation

As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Dennis Rogers

Signature:

Title: Plant Leader

## Appendix A

FG1 BATCH WETTINGGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2009 through December 31, 2009

Owens Corning Insulating Systems, LLC– Fairburn

7000 McLarin Road Fairburn, GA 30213

FG1 Batch Wetting:

During the reporting period, the FG1 Batch Wetting experienced 144.00 hours of monitoring parameter excursions. The attached tabl es list the date and time for the

deviations.



### FG1 BATCH WETTING
Owens Corning

Fairburn, GA

Date Beginning

Time Ending Time Total Hours

11/24/09 10:00 11/30/09 10:00 144.00

Total Hours 144.0

## Appendix B

FG2 BATCH WETTINGGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2009 through December 31, 2009

Owens Corning Insulating Systems, LLC– Fairburn

7000 McLarin Road Fairburn, GA 30213

FG2 BATCH WETTING:

During the reporting period, the FG2 Batch Wetting experienced 241.92 hours of monitoring parameter excursions. The attached tabl es list the date and time for the

deviations.



### FG2 BATCH WETTING
Owens Corning

Fairburn, GA

Date Beginning Time Ending Time Total Hours

8/30/09 9:00 9/1/09 9:00 72.00

9/6/09 13:00 9/8/09 13:00 48.00

9/11/09 1:30 9/15/09 9:20 103.83

9/23/09 5:30 10:10 4.67

9/29/09 8:30 10:00 1.50

9/30/09 6:20 18:15 11.92

Total Hours 241.92