January 27, 2006

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

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

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing time. Each report is labeled appropriately and is for the period July 1, 2005 th rough 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, Monte Schenken at (408) 235-1358.

Sincerely,

Pete Koska Plant Manager Owens Corning Santa Clara, California

attachmentReport: 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 – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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 Startup, Shutdown, and Malfunction Where Actions

Taken were Inconsistent with SSM Plan 40 CFR 63 Subpart NNN

Beginning October 14, 2005 at 14:30 and continuing until October 20, 2005 at 17:30 the plant experienced an equipment malfunctio n that resulted in the plant not being able to electronically monitor the air te mperature 18 to 24 inches above the glass crust temperature in the O-line Furnace. The crust conditions were monitored visually at least once per shift during t his period, however the observations were not consistently documented. Th ere were no crust loss events during this period.

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

Print Name: Pete Koska

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 – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

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

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

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:

M Furnace – 4416 hours

M Line – 4191 hours

O Furnace – 4416 hours

O Line – 4328 hours

Deviations :

Hours Deviation % Deviation

M Line Incinerator 1.57 0.04

O Line High LOI 5.67 0.13

O Line Batch Wetting 8.00 0.18

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time.As the responsible official, I certify that the con tent of this report is accurate.

Print Name: Pete Koska

Signature:

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

Performance 40 CFR 63 Subpart NNN

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

Owens Corning – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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: Pete Koska

Signature:

Title: Plant LeaderJuly 19, 2006

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

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

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing 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, Monte Schenken at (408) 235-1358.

Sincerely,

Pete Koska Plant Manager Owens Corning Santa Clara, California

attachmentReport: 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 – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

Based on requirements within the Startup, Shutdown, and Malfunction Plan, if the incinerator temperature falls below 1340 0 F for more than 15 minutes, the line production must be suspended. On 3/4/06, one of th e M-line incinerators temperature dropped below 1340 0 F, the low temperature alarm failed, and for a peri od of 39 minutes line production continued. A breakdown report, # 0 4T11 was submitted to the BAAQMD along with the 10 day and 30 day reports.

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

Plan 40 CFR 63 Subpart NNN

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

OMM Plan.

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

Print Name: Pete Koska

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 – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

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:

M Furnace – 4344 hours

M Line – 4145 hours

O Furnace – 4344 hours

O Line – 4253 hours

Deviations :

Hours Deviation % Deviation

M Line Incinerator 0.65 0.02

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time.

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

Print Name: Pete Koska

Signature:

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

Performance 40 CFR 63 Subpart NNN

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

Owens Corning – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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: Pete Koska

Signature:

Title: Plant LeaderJanuary 22, 2007

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

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

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing time. Each report is labeled appropriately and is for the period July 1, 2006 th rough 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, Monte Schenken at (408) 235-1358.

Sincerely,

Dan Cochran

Plant Leader Owens Corning Santa Clara, California

attachmentReport: 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 – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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) 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: Dan Cochran

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 – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

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:

M Furnace – 4416 hours

M Line – 4063.8 hours

O Furnace – 4416 hours

O Line – 4136.2 hours

Deviations:

M-Line

• High LOI 4.0 hours 0.10%

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time. Since the total exceedance time for each parameter is less than 1%, no additional detail wil l be provided in this report.

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

Print Name: Dan Cochran

Signature:

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

Performance 40 CFR 63 Subpart NNN

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

Owens Corning – Santa Clara Plant 960 Central Expressway Santa Clara, CA 95050

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: Dan Cohran

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC – SANTA CLARA

960 CENTRAL EXPRESSWAY SANTA CLARA, CALIFORNIA 95050

July 23, 2007

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

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

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing 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, Monte Schenken at (408) 235-1358.

Sincerely,

James Gerodimos

Plant Leader Owens Corning Insulating Systems, LLC Santa Clara, California

AttachmentReport: 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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

Although there were startups, shutdowns and malfunc tions during this reporting, 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: James Gerodimos

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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

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:

M Furnace – 4344 hours

M Line – 3644 hours

O Furnace – 4344 hours

O Line – 3833 hours

Deviations:

M-Line

• High LOI 1 hour 0.03%

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time. Since the total exceedance time for each parameter is less than 1%, no additional detail wil l be provided in this report.

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

Print Name: James Gerodimos

Signature:

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

Performance 40 CFR 63 Subpart NNN

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

Owens Corning Insulating Systems, LLC – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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: James Gerodimos

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC – SANTA CLARA

960 CENTRAL EXPRESSWAY SANTA CLARA, CALIFORNIA 95050

January 30, 2008

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

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

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing time. Each report is labeled appropriately 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 Leader, Monte Schenken at (408) 235-1358.

Sincerely,

James Gerodimos

Plant Leader Owens Corning Insulating Systems, LLC – Santa Clara

AttachmentReport: 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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

Although there were startups, shutdowns and malfunc tions during this reporting, 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: James Gerodimos

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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

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

M Furnace – 4416 hours

M Line – 3894 hours

O Furnace – 4416 hours

O Line – 4036 hours

Deviations:

M-Line

• High LOI 0.33 hours 0.01%

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time. Since the total exceedance time for each parameter is less than 1%, no additional detail wil l be provided in this report.

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

Print Name: James Gerodimos

Signature:

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

Performance 40 CFR 63 Subpart NNN

Reporting Period : July 1 through December 31, 2007

Owens Corning Insulating Systems, LLC – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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: James Gerodimos

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC – SANTA CLARA

960 CENTRAL EXPRESSWAY SANTA CLARA, CALIFORNIA 95050

July 10, 2008

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

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

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing time. Each report is labeled appropriately and is for the period January 1, 2008 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, Monte Schenken at (408) 235-1358.

Sincerely,

James Gerodimos

Plant Leader Owens Corning Insulating System, LLC Santa Clara, California

AttachmentReport: 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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

Although there were startups, shutdowns and malfunc tions during this reporting, 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: James Gerodimos_________

Signature:

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

Monitoring System Performance 40CFR63 Subpart NNN

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

Owens Corning Insulating Systems, LLC – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

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

M Furnace – 4344 hours

M Line – 2981 hours

O Furnace – 4344 hours

O Line – 2990 hours

Deviations:

No deviation of a monitored parameter occurred duri ng this reporting period.

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

Print Name: James Gerodimos__

Signature:

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

Performance 40 CFR 63 Subpart NNN

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

Owens Corning Insulating Systems, LLC – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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 for this reporting period.

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

Print Name: James Gerodimos

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC – SANTA CLARA

960 CENTRAL EXPRESSWAY SANTA CLARA, CALIFORNIA 95050

January 23, 2009

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

RE: MACT Semi-Annual Reporting - July 1 through Dec ember 31, 2008

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing 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 contac t our Facility Environmental Leader, Monte Schenken at (408) 235-1358.

Sincerely,

James Gerodimos

Plant Leader Owens Corning Insulating Systems, LLC – Santa Clara

AttachmentReport: 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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

Although there were startups, shutdowns and malfunc tions during this reporting, 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: James Gerodimos

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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

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

M Furnace – 4416 hours

M Line – 3438.7 hours

O Furnace – 4416 hours

O Line – 4009.3 hours

Deviations:

O-Line

• High LOI 2.0 hours 0.05%

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time. Since the total exceedance time for each parameter is less than 1%, no additional detail wil l be provided in this report.

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

Print Name: James Gerodimos

Signature:

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

Performance 40 CFR 63 Subpart NNN

Reporting Period : July 1 through December 31, 2008

Owens Corning Insulating Systems, LLC – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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: James Gerodimos

Signature:

Title: Plant LeaderOWENS CORNING INSULATING SYSTEMS, LLC – SANTA CLARA

960 CENTRAL EXPRESSWAY SANTA CLARA, CALIFORNIA 95050

January 18, 2010

Compliance and Enforcement Division Bay Area Air Quality Management District

939 Ellis Street San Francisco, California 94109

Attn: Mr. James Guthrie - Director

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

Dear Mr. Guthrie,

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 40 CFR 63.10(e)(3) and 40 CF R 63.1386(e) if monitored parameters deviate more than 1% of the total operat ing time. Each report is labeled appropriately 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, Monte Schenken at (408) 235-1358.

Sincerely,

James Gerodimos

Plant Leader Owens Corning Insulating Systems, LLC – Santa Clara

AttachmentReport: 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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

Although there were startups, shutdowns and malfunc tions during this reporting, 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: James Gerodimos

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 – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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 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

O

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Incinerator TemperatureTABLE 2

Process Control Device Monitored Parameter

M

Furnace Glass Melting Batch Wetting Water Flow

Glass Melting Molten Glass Throughput Glass Melting Temperature above molten glass

Line Forming Premix Formulation

LOI Resin Free Formaldehyde Molten Glass Throughput Curing Charge

Incinerator Discharge

Incinerator Temperature

Emission Data Summary / Operating Hours for Facilit y

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

M Furnace – 4284 hours

M Line – 2633.2 hours

O Furnace – 4416 hours

O Line – 4291.7 hours

Deviations:

O-Line

• High LOI 2.25 hours 0.05%

Based on these operating hours and known deviations , there were no monitoring parameters over the 1% exceedance time. Since the total exceedance time for each parameter is less than 1%, no additional detail wil l be provided in this report.

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

Print Name: James Gerodimos

Signature:

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

Performance 40 CFR 63 Subpart NNN

Reporting Period : July 1 through December 31, 2009

Owens Corning Insulating Systems, LLC – Santa Clara 960 Central Expressway Santa Clara, CA 95050

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: James Gerodimos

Signature:

Title: Plant Leader