July 27, 2005

Bruce O’Neill Environmental Engineer 1 New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

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

Dear Mr. O’Neill,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately 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 Leader, David Krenitsky, at (518) 475-3673.

Sincerely,

Michael Devane Interim Plant Leader / Operations Leader Owens Corning, Delmar Plant Feura Bush, NY

cc: Karl Mangels – Chief, Air Compliance Bra nch, USEPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: 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 – June 30, 2005

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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.

Type/Print Name: Michael Devane

Signature:

Title: Interim Plant Leader / Operations LeaderSummary Report – Gaseous and Opacity Excess Emissio n and Continuous

Monitoring System Performance 40 CFR 63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling .

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

<TABLE 1>

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”<TABLE 2>

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

For the period January 1, 2005 – June 30, 2005 the operating hours are:

DM1 Furnace – 4139.4 hours

DM1 Line – 3894 hours

DM2 Furnace – 3990.4 hours

DM2 Line – 3657 hours

Deviations:

DM2 Furnace

• 1 st Field Operating Status 32.90 0.82%

• 2 nd Field Operating Status 30.35 0.76%

• 3 rd Field Secondary Voltage 15.18 0.38%

• 3 rd Field Secondary Current 15.15 0.38%

• By-Pass all SIRs Operating 0 0.00%Based on these operating hours and known deviations neither furnace DEP was over the

1% exceedance time. Since the total exceedance tim e is less than 1%, no additional detail will be provided in this report.

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

Type/Print Name: Michael Devane

Signature:

Title: Interim Plant Leader / Operations LeaderGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Michael Devane

Signature:

Title: Interim Plant Leader / Operations LeaderJanuary 27, 2006

Bruce O’Neill Environmental Engineer 1 New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

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

Dear Mr. O’Neill,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately 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 Leader, David Krenitsky, at (518) 475-3673.

Sincerely,

Paul Borders

Plant Leader Owens Corning, Delmar Plant Feura Bush, NY

cc: Karl Mangels – Chief, Air Compliance Bra nch, USEPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: 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 – December 31, 2005

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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, m aintenance and Monitoring (OMM)SSM 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.

Type/Print Name: Paul Borders

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling .

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

<TABLE 1>

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”<TABLE 2>

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

For the period July 1, 2005 – December 31, 2005 the operating hours are:

DM1 Furnace – 4416 hours

DM1 Line – 4205.5 hours

DM2 Furnace – 4416 hours

DM2 Line – 4208.37 hours

Deviations:

DM1 Furnace DEP

• 1 st Field Operating Status 8.25 hrs 0.19%

• 2 nd Field Operating Status 8.25 hrs 0.19%

• 3 rd Field Secondary Voltage 8.25 hrs 0.19%

• 3 rd Field Secondary Current 8.25 hrs 0.19%

DM2 Furnace DEP

• 1 st Field Operating Status 81.73 hrs 1.85%

• 2 nd Field Operating Status 4.15 hrs 0.09%

• 3 rd Field Secondary Voltage 4.15 hrs 0.09%

• 3 rd Field Secondary Current 4.15 hrs 0.09%

DM2 High LOI 0.25 hrs 0.01%Based on these operating hours, the following monit oring parameters were over the 1%

exceedance time:

DM2 Furnace DEP

• 1 st Field Operating Status 81.73 hrs 1.85%

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.

Type/Print Name: Paul Borders

Signature:

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

Performance 40CFR63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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

DM2 Furnace DEP

• 1 st Field Operating Status - – See Appendix A for deta ils

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

Type/Print Name: Paul Borders

Signature:

Title: Plant Leader

## APPENDIX A

DM2 Furnace DEP

1 st 

## Field Operating StatusGaseous and Opacity Excess Emission and Continuous Monitoring System

Performance 40CFR63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

DM2 Furnace DEP Parameter Excursions

December 25 – 28, 2005 During the period 12/25/05 – 12/28/05, DM2 Furnace DEP #1 field (only) was out of operation for 81.73 hours. During this period, #2 field and #3 field were fully operational except on 12/27 for 4.15 hours when the furnace wen t to bypass. The cause of #1 field downtime was various electrical issues, which requi red a period of investigation and troubleshooting. The cause of the bypass was to sa fely gain access to the DEP to perform additional troubleshooting of #1 field.

The table below summarizes the DM2 DEP SIR 1 Operat ing Status Deviations:

DM-2 DEP SIR 1 Operating Status Deviations
Owens Corning – Delmar, NY
July 1, 2005 to December 31, 2005

Beginning

Date & Time Ending

Date & Time Minutes

Duration

25-DEC-05 04:18 28-DEC-05 14:02 4904

TOTAL Minutes 4904

TOTAL Hours 81.73July 20, 2006

Bruce O’Neill Environmental Engineer 1 New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

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

Dear Mr. O’Neill,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately 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 Leader, David Krenitsky, at (518) 475-3673.

Sincerely,

Paul Borders

Plant Leader Owens Corning, Delmar Plant Feura Bush, NY

cc: Karl Mangels – Chief, Air Compliance Bra nch, USEPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: Periods of Startup, Shutdown, and Malfunction Wher e Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

All instances of startup, shutdown and malfunction were dealt with in accordance with the facility Startup, Shutdown and Malfunction (SSM ) Plan.

Report: Periods of Deviation from the Operations, Mainten ance and Monitoring (OMM)

Plan 40 CFR 63 Subpart NNN

Based on requirements within the Operations, Mainte nance, and Monitoring Plan, an LOI is required at least once every 8 (eight) hours on each manufacturing line. On the two manufacturing lines there were a total of 2 inciden ts, one on DM1 and one on DM2, where the duration between LOI testing exceeded the 8 (eight) hours.

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

Type/Print Name: Paul Borders

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

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

DM1 Furnace – 4344 hours

DM1 Line – 4137.5 hours

DM2 Furnace – 4344 hours

DM2 Line – 4113.8 hours

Deviations:

DM1 Furnace By-Pass all SIRs 0.41 0.01%

DM2 Furnace By-Pass all SIRs 17.17 0.39%

Based on these operating hours and known deviations neither furnace DEP was over the

1% exceedance time. Since the total exceedance tim e is less than 1%, no additional detail will be provided in this report.As the responsible official, I certify that the con tent of this report is accurate.

Type/Print Name: Paul Borders

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 – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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

No instances of monitored parameter deviations were over the 1% trigger level for this report.

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

Type/Print Name: Paul Borders

Signature:

Title: Plant LeaderJanuary 25, 2007

Bruce O’Neill Environmental Engineer 1 New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

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

Dear Mr. O’Neill,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately 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 Leader, David Krenitsky, at (518) 475-3673.

Sincerely,

Paul Borders

Plant Leader Owens Corning, Delmar Plant Feura Bush, NY

cc: Karl Mangels – Chief, Air Compliance Bra nch, USEPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: 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 – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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

.

Report: Periods of Deviationfrom the Operations, Ma intenance 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.

Type/Print Name: Paul Borders

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

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

Owens Corning – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

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

DM1 Furnace – 4416 hours

DM1 Line – 4049.57 hours

DM2 Furnace – 4416 hours

DM2 Line – 4033.92 hours

Deviations:

DM1 Furnace

• 1 st Field Operating Status 24.85 0.56%

• 2 nd Field Operating Status 6.97 0.16%

• 3 rd Field Secondary Voltage 6.95 0.16%

• 3 rd Field Secondary Current 6.95 0.16%

• By-Pass all SIRs 0.3 0.01%

DM2 Furnace

• 1 st Field Operating Status 6.83 0.15%

• 2 nd Field Operating Status 6.83 0.15%

• 3 rd Field Secondary Voltage 6.83 0.15%

• 3 rd Field Secondary Current 6.83 0.15%

• By-Pass all SIRs 0.13 0.00%Based on these operating hours and known deviations neither furnace DEP was over the

1% exceedance time. Since the total exceedance tim e is less than 1%, no additional detail will be provided in this report.

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

Type/Print Name: Paul Borders

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 – Delmar Plant

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Paul Borders

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - DELMAR
1277 FEURA BUSH ROAD FEURA BUSH, NY 12067

July 25, 2007

Bruce O’Neill Environmental Engineer 1 New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

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

Dear Mr. O’Neill,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately 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 Leader, David Krenitsky, at (518) 475-3673.

Sincerely,

Paul Borders

Plant Leader Owens Corning Insulating Systems, LLC - Delmar Feura Bush, NY

cc: Karl Mangels – Chief, Air Compliance Branch, US EPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: 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 - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

Although there were startups, shutdowns and malfunc tions during this reporting period, all actions taken were consistent with the Startup, Shutdown, and Malfunction (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.

Type/Print Name: Paul Borders

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

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

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

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

DM1 Furnace – 4344 hours

DM1 Line – 3939.32 hours

DM2 Furnace – 4344 hours

DM2 Line – 3971.35 hours

Deviations:

Hours Deviation % Deviation

DM1 Furnace

• 1 st Field Operating Status 8.95 0.21%

• 2 nd Field Operating Status 8.95 0.21%

• 3 rd Field Secondary Voltage 8.95 0.21%

• 3 rd Field Secondary Current 8.95 0.21%

DM2 Furnace

• 1 st Field Operating Status 10.5 0.24%

• 2 nd Field Operating Status 10.5 0.24%

• 3 rd Field Secondary Voltage 10.5 0.24%

• 3 rd Field Secondary Current 10.5 0.24%

• By-Pass all SIRs 0.16 0.004%Based on these operating hours and known deviations neither furnace DEP was over the

1% exceedance time. Since the total exceedance tim e is less than 1%, no additional detail will be provided in this report.

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

Type/Print Name: Paul Borders

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 - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Paul Borders

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - DELMAR
1277 FEURA BUSH ROAD FEURA BUSH, NY 12067

July 29, 2008

Gary McPherson Environmental Engineer II New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

Re: MACT Semi-Annual Reporting for Period July 1, 2007 through December 31, 2007

Dear Mr. McPherson,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately and is for the period July 1, 2007 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 Leader, David Krenitsky, at (518) 475-3673.

Sincerely,

Louis St. Pierre

Plant Leader Owens Corning Insulating Systems, LLC - Delmar Feura Bush, NY

cc: Karl Mangels – Chief, Air Compliance Branch, US EPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : July 1, 2007 through December 31, 2007

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

Although there were startups, shutdowns and malfunc tions during this reporting period, all actions taken were consistent with the Startup, Shutdown, and Malfunction (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.

Type/Print Name: Louis St. Pierre

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

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

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

For the period July 1, 2007 through December 31, 20 07 the operating hours are:

DM1 Furnace – 4416 hours

DM1 Line – 3786.9 hours

DM2 Furnace – 4416 hours

DM2 Line – 3714.8 hours

Déviations:

Hours Deviation % Deviation

DM1 Furnace

• 1 st Field Operating Status 0 0.00%

• 2 nd Field Operating Status 0 0.00%

• 3 rd Field Secondary Voltage 0 0.00%

• 3 rd Field Secondary Current 0 0.00%

• Bypass all SIR’s Operating 0.35 0.01%

DM2 Furnace

• 1 st Field Operating Status 43.25 0.96%

• 2 nd Field Operating Status 43.25 0.96%

• 3 rd Field Secondary Voltage 43.25 0.96%

• 3 rd Field Secondary Current 43.25 0.96%

• By-Pass all SIRs 0.25 0.01%Based on these operating hours and known deviations neither furnace DEP was over the

1% exceedance time. Since the total exceedance tim e is less than 1%, no additional detail will be provided in this report.

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

Type/Print Name: Louis St. Pierre

Signature:

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

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2007 through December 31, 2007

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Louis St. Pierre

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - DELMAR
1277 FEURA BUSH ROAD FEURA BUSH, NY 12067

January 20, 2009

Gary McPherson Environmental Engineer II New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

Re: MACT Semi-Annual Reporting for Period January 1, 2008 through June 30, 2008

Dear Mr. McPherson,

Please find attached a revised MACT Semi-Annual Rep ort for reporting period January 1, 2008 through June 30, 2008.

On July 29, 2008 Owens Corning Insulating System, L LC submitted the MACT Semi-Annual Report for January 1, 2008 through June 30, 2008. The report included three separate reports as required by 40CFR63 Subparts A and NNN.

During review of the facility data to complete the MACT Semi-Annual report for the 2 nd half of 2008, we discovered a deviation that occurred durin g the 1 st half of 2008 reporting period that had not been included in this report. This deviation h as been added to the second report of this document “Summary Report – Gaseous and Opacity Exce ss Emission and Continuous Monitoring System Performance” as required in 40CFR 63.10(e)(3) and 40CFR63.1386(e).

As the responsible official, I certify to the accur acy of this report. If you have any questions regarding this information, please contact our faci lity Environmental Leader, David Krenitsky at

518-475-3673.

Sincerely,

Louis St. Pierre

Plant Leader Owens Corning Insulating Systems, LLC - Delmar Feura Bush, NY

cc: Karl Mangels – Chief, Air Compliance Branch, US EPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : January 1, 2008 through June 30, 2008

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

Although there were startups, shutdowns and malfunc tions during this reporting period, all actions taken were consistent with the Startup, Shutdown, and Malfunction (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.

Type/Print Name: Louis St. Pierre

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

Reporting Period : January 1, 2008 through June 30, 2008

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

For the period January 1, 2008 through June 30, 200 8 the operating hours are:

DM1 Furnace – 288 hours

DM1 Line – 0 hours

DM2 Furnace – 4344 hours

DM2 Line – 4077 hours

Déviations:

Hours Deviation % Deviation

DM1 Furnace

• 1 st Field Operating Status 0 0.00%

• 2 nd Field Operating Status 0 0.00%

• 3 rd Field Secondary Voltage 0 0.00%

• 3 rd Field Secondary Current 0 0.00%

• Bypass all SIR’s Operating 0 0.00%

DM2 Furnace

• 1 st Field Operating Status 0 0.00%

• 2 nd Field Operating Status 0 0.00%

• 3 rd Field Secondary Voltage 0 0.00%

• 3 rd Field Secondary Current 15.7 0.36%

• By-Pass all SIRs 0 0.00%Based on these operating hours and known deviations neither furnace DEP was over the

1% exceedance time. Since the total exceedance tim e is less than 1%, no additional detail will be provided in this report.

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

Type/Print Name: Louis St. Pierre

Signature:

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

Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2008 through June 30, 2008

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Louis St. Pierre

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - DELMAR
1277 FEURA BUSH ROAD FEURA BUSH, NY 12067

January 28, 2009

Gary McPherson Environmental Engineer II New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

Re: MACT Semi-Annual Reporting - July 1, 2008 thr ough December 31, 2008

Dear Mr. McPherson,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately and is for the period July 1, 2008 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 contac t our Facility Environmental Leader, David Krenitsky, at (518) 475-3673.

Sincerely,

Louis St. Pierre

Plant Leader Owens Corning Insulating Systems, LLC - Delmar

cc: Karl Mangels – Chief, Air Compliance Branch, US EPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : July 1, 2008 through December 31, 2008

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

Although there were startups, shutdowns and malfunc tions during this reporting period, all actions taken were consistent with the Startup, Shutdown, and Malfunction (SSM)

Plan.

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

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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

1. Based on requirements within the OMM Plan, a den sity check is required at least once every 8 hours. There were two incid ents where the duration between density testing exceeded eight hours.

2. Based on requirements within the OMM Plan, an L OI check is required at least once every 8 hours. There were two incidents where the duration between LOI testing exceeded eight hours.

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

Type/Print Name: Louis St. Pierre

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

Reporting Period : July 1, 2008 through December 31, 2008

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

For the period July 1, 2008 through December 31, 20 08 the operating hours are:

DM1 Furnace – 0 hours

DM1 Line – 0 hours

DM2 Furnace – 4416 hours

DM2 Line – 4108 hours

Deviations:

Hours Deviation % Deviation

DM2 Furnace

• 1 st Field Operating Status 11.2 0.25%

• 2 nd Field Operating Status 11.2 0.25%

• 3 rd Field Secondary Voltage 11.2 0.25%

• 3 rd Field Secondary Current 11.2 0.25%

• By-Pass all SIRs 0.5 0.01%Based on these operating hours and known deviations , neither furnace DEP was over the

1% exceedance time. Since the total exceedance tim e is less than 1%, no additional detail will be provided in this report.

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

Type/Print Name: Louis St. Pierre

Signature:

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

Performance 40CFR63 Subpart NNN

Reporting Period : July 1, 2008 through December 31, 2008

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Louis St. Pierre

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - DELMAR
1277 FEURA BUSH ROAD FEURA BUSH, NY 12067

July 21, 2009

Gary McPherson Environmental Engineer II New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

Re: MACT Semi-Annual Reporting for Period January 1, 2009 through June 30, 2009

Dear Mr. McPherson:

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately and is for the period January 1, 2009 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, David Krenitsky, at (518) 475-3673.

Sincerely,

Louis St. Pierre

Plant Leader Owens Corning Insulating Systems, LLC - Delmar

cc: Karl Mangels – Chief, Air Compliance Branch, US EPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Reporting Period : January 1, 2009 through June 30, 2009

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

Although there were startups, shutdowns and malfunc tions during this reporting period, all actions taken were consistent with the Startup, Shutdown, and Malfunction (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 procedure outlined in the facility OMM Plan:

1. Based on requirements within the OMM Plan, a densit y check is required at least once every 8 hours. There was one incident where t he duration between density testing exceeded eight hours.

2. Based on requirements within the OMM Plan, an LOI c heck is required at least once every 8 hours. There was one incident where t he duration between LOI testing exceeded eight hours.

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

Type/Print Name: Louis St. Pierre

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

Reporting Period : January 1, 2009 through June 30, 2009

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

For the period January 1, 2009 through June 30, 200 9 the operating hours are:

DM1 Furnace – 0 hours

DM1 Line – 0 hours

DM2 Furnace – 4344 hours

DM2 Line – 4033 hours

Deviations:

Hours Deviation % Deviation

DM2 Furnace

• By-Pass all SIRs 0.17 0.00%

Based on these operating hours and known deviations the total exceedance time is less than 1%, no additional detail will be provided in t his report.

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

Type/Print Name: Louis St. Pierre

Signature:

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

Performance 40CFR63 Subpart NNN

Reporting Period : January 1, 2009 through June 30, 2009

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Louis St. Pierre

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC - DELMAR
1277 FEURA BUSH ROAD FEURA BUSH, NY 12067

January 26, 2010

Gary McPherson Environmental Engineer II New York State Department of Environmental Conserva tion Region 4

1150 North Westcott Road Schenectady, New York 12306-2014

Re: MACT Semi-Annual Reporting - July 1, 2009 thr ough December 31, 2009

Dear Mr. McPherson,

This report includes three separate reports as requ ired by 40 CFR 63 Subparts A and NNN. The first report summarizes periods of startu p, shutdown, and malfunction where actions taken were inconsistent with the plan in ac cordance 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 Emission and Continuous Monitoring System Performance” as required in 40 CFR 63.10(e)(3) and 40 CFR 63.138 6(e). The third report is the “Gaseous and Opacity Excess Emission and Continuous Monitoring System Performance Report” as required in 40CFR63.10(e)(3) and 40CFR63 .1386(e) if monitored parameters deviate more than 1% of the total operating time. Each report is labeled appropriately and is for the period July 1, 2009 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, David Krenitsky, at (518) 475-3673.

Sincerely,

Louis St. Pierre

Plant Leader Owens Corning Insulating Systems, LLC - Delmar

cc: Karl Mangels – Chief, Air Compliance Branch, US EPA Region 2 David A. Krenitsky – Environmental Leader, Delmar P lant

AttachmentsReport: Periods of Startup, Shutdown, and Malfuncti on Where Actions Taken were

Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

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

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

Although there were startups, shutdowns and malfunc tions during this reporting period, all actions taken were consistent with the Startup, Shutdown, and Malfunction (SSM)

Plan.

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

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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.

Type/Print Name: Louis St. Pierre

Signature:

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

Monitoring System Performance 40 CFR 63 Subpart NNN

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

Owens Corning Insulating Systems, LLC - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

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 lbs per ton of molte n glass produced, during fiber forming, curing and cooling.

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 forming conveyor. Once collected, the pack passes through a curing and coo ling process followed by final fabrication and packaging. Tables 1 and 2 define t he manufacturing sources at this facility, including individual processes, control d evices, and monitored parameters.

TABLE 1

Process Control

Device Monitored Parameter

DM1

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”TABLE 2

Process Control

Device Monitored Parameter

DM2

Furnace Glass Melting DEP 1 st Field – Operating Status

2 nd Field – Operating Status

3 rd Field – Secondary Voltage

3 rd Field – Secondary Current By Pass - all SIRs Operating Glass Melting Molten Glass Throughput

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator Temperature Cooling None See “Forming”

Emission Data Summary / Operating Hours for Facilit y

For the period July 1, 2009 through December 31, 20 09 the operating hours are:

DM1 Furnace – 4416 hours

DM1 Line – 3361.78 hours

DM2 Furnace – 6.75 hours

DM2 Line – 0 hours

Deviations:

Hours Deviation % Deviation

DM1 Furnace

• 3 rd Field Secondary Voltage 12.0 0.27 %

• 3 rd Field Secondary Current 12.0 0.27 %

• By-Pass all SIRs 31.8 0.72 %

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time. Since the total exceedance time is less than 1%, no additional detail will be provided in this r eport.As the responsible official, I certify that the con tent of this report is accurate.

Type/Print Name: Louis St. Pierre

Signature:

Title: Plant LeaderGaseous 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 - Delmar

1277 Feura Bush Road Feura Bush, NY 12067

The following instances are being reported as a dev iation of a monitoring 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.

Type/Print Name: Louis St. Pierre

Signature:

Title: Plant Leader