DAQE-AN0033007-04 

November 15, 2004 

Paul H. Griffin 

Owens Corning 

PO Box 27397 

4340 West 850 South 

Salt Lake City, Utah 84127 

Dear Mr. Griffin: 

Re: Approval Order: Replace Manual Lint Cleaning System With a Mechanical System 

 Salt Lake County – CDS SM; NA; MAINT; NSPS, HAPs, TITLE V 

 Project Code: N0033-007 

The attached document is an Approval Order for the above-referenced project. 

Future correspondence on this Intent to Approve should include the engineer's name as well as the DAQE

number as shown on the upper right-hand corner of this letter. Please direct any technical questions you 

may have on this project to Mr. Maung Maung. He may be reached at (801) 536-4153. 

Sincerely, 

Richard W. Sprott, Executive Secretary 

Utah Air Quality Board 

RWS:MM:re 

cc: Salt Lake Valley Health Department 

Mike Owens, EPA Region VIII 

 

150 North 1950 West • PO Box 144820 • Salt Lake City, UT 84114-4820 • phone (801) 536-4000 • fax (801) 536-4099 

T.D.D. (801) 536-4414 • www.deq.utah.gov

State of Utah 

Department of 

Environmental Quality 

Dianne R. Nielson, Ph.D. 

Executive Director 

DIVISION OF AIR QUALITY 

Richard W. Sprott 

Director 

OLENE S. WALKER 

Governor 

GAYLE F. McKEACHNIE 

Lieutenant Governor
STATE OF UTAH 

Department of Environmental Quality 

Division of Air Quality 

APPROVAL ORDER: Replace Manual Lint Cleaning System 

With a Mechanical System

Prepared By: Maung Maung, Engineer 

(801) 536-4153 

Email: mmaung@utah.gov 

APPROVAL ORDER NUMBER

DAQE-AN0033007-04 

Date: November 15, 2004 

Owens Corning

Source Contact 

Paul H. Griffin 

(801) 973-6375 

Ext. 12 

Richard W. Sprott 

Executive Secretary 

Utah Air Quality Board 
Abstract 

Owens Corning has requested modification of their current Approval Order (AO) 

DAQE-AN0033008-02, dated September 20, 2002, to replace a lint screen on the Fiber/Pack Forming 

Section of the unbonded loose fill line with an automated screen cleaning system. Current system 

requires the filter cake to be manually removed from the lint screen quite frequently. Owens Corning 

proposes to install an automated screen cleaning mechanism which vacuums the captured lint off the 

collection system. This replacement of lint cleaning system meets the requirements of R307-413-3, 

Flexibility changes. 

The Owens Corning site is located in Salt Lake City, Utah. Salt Lake County is a non-attainment area 

of the National Ambient Air Quality Standards (NAAQS) for PM10 and SO2, and is a maintenance area 

for ozone. New Source Performance Standards (NSPS), Subpart PPP, (Standards of Performance for 

Wool Fiberglass Insulation Manufacturing Plants) applies to this source. Title V of the 1990 Clean 

Air Act applies to this source and the Salt Lake City Owens Corning plant is a minor Title V source. 

There will be no increase in emissions from this change. 

The above-referenced project has been evaluated and found to be consistent with the requirements of the 

Utah Administrative Code Rule 307 (UAC R307), and the Utah Air Conservation Act. A public 

comment period was not required for this project. This air quality AO authorizes the project with the

following conditions and failure to comply with any of the conditions may constitute a violation of this 

order. 

General Conditions:

1. This AO applies to the following company: 

Site Office

Owens Corning 

4340 West 850 South 

Salt Lake City, Utah 84104 

Phone Number: (801) 973-6375 

Fax Number: (801) 972-4576 

The equipment listed in this AO shall be operated at the following location: 

PLANT LOCATION:

4340 West 850 South Salt Lake City, Utah 

Universal Transverse Mercator (UTM) Coordinate System: Datum NAD 27 

4,511.45 kilometers Northing; 416.05 kilometers Easting; Zone 12 

2. All definitions, terms, abbreviations, and references used in this AO conform to those 

used in the Utah Administrative Code (UAC) Rule 307 (R307) and Title 40 of the Code 

of Federal Regulations (40 CFR). Unless noted otherwise, references cited in these AO 

conditions refer to those rules. 

3. The limits set forth in this AO shall not be exceeded without prior approval in accordance 

with R307-401. 
DAQE-AN0033007-04 

Page 3

4. Modifications to the equipment or processes approved by this AO that could affect the 

emissions covered by this AO must be reviewed and approved in accordance with 

R307-401-1. 

5. All records referenced in this AO or in applicable NSPS which are required to be kept by 

the owner/operator, shall be made available to the Executive Secretary or Executive 

Secretary’s representative upon request, and the records shall include the two-year period 

prior to the date of the request. Records shall be kept for the following minimum 

periods: 

A. Emission inventories Five years from the due date of each emission statement 

 or until the next inventory is due, whichever is longer. 

B. All other records Two years 

6. Owens Corning, Inc. shall replace manually cleaned lint screen equipment with a 

automatic screen cleaning system and shall conduct its operations of the fiberglass 

insulation plant in accordance with the terms and conditions of this AO, which was 

written pursuant to Owens Corning’s Notice of Intent (NOI) submitted to the Division of 

Air Quality (DAQ) on September 14, 2004. 

7. This AO shall replace the AO (DAQE-AN0033008-02) dated September 20, 2002. 

8. The approved installations shall consist of the following equipment or equivalent*: 

A. Two Owens Corning PR1 fiberizers for the Batt line 

One Owens Corning RH15 fiberizer for the ProPink fill line 

B. Glass raw material handling system consisting of: 

Pneumatic conveying system to transport raw material from delivery trucks to 

storage bins 

Seven enclosed storage bins, each with an individual dust collector, Mikropul 

model 25S-8 C style with a total filter area of 242 sq. ft 

Batch mixer/weighing with dedicated Mikropul model 25S-8C style dust 

collector 

The 8 dust collectors above, vent internally to the batch house 

Miscellaneous enclosed transfer/feed system 

C. Resin and binder handling system consisting of: 

One urea storage silo with a bin vent filter 

One urea solution mix tank 

Two resin pre-mix tanks 

One binder mix tank 
DAQE-AN0033007-04 

Page 4

One binder run tank 

One resin bulk storage tank 

One binder oil bulk storage tank 

One mineral oil bulk storage tank 

D. Two electric furnaces used to produce molten glass, each with a 49S-8-20 

MikroPul pulse jet baghouse with 462 ft2 of filter area 

E. One batt insulation production line using the rotary spin process with two 

associated fiberizers, conveyors, natural gas-fired curing oven and cooling table 

with the following stacks: 

Stack 28: Emissions from the forming section and curing oven 

Stack 65: Emissions from the cooling table with filter screen box with 5 ft2 

of filter area 

F. One sock-type filter with 43 ft2 of filter area on the exhaust of the receiver/bagger 

unit on the batt line edge trim and scrap material blowing wool system. 

G. One ProPink production line using the rotary spin process with one associated 

fiberizer and penclone air filter with the following stack: 

Stack 28: Emissions from the forming section 

H. Unbonded loose fill line with forming exhaust lint screen. 

* Equivalency shall be determined by the Executive Secretary. 

Stack Parameters

9. Owens Corning’s Western Fiberglass Plant shall notify the Executive Secretary in writing 

when the installation of the automated screen cleaning system listed in Condition # 8.H 

have been completed and are operational, as an initial compliance inspection is required. 

To insure proper credit when notifying the Executive Secretary, send your 

correspondence to the Executive Secretary, attn: Compliance Section. 

If construction and installation have not been completed within eighteen months from the 

date of this AO, the Executive Secretary shall be notified in writing on the status of the 

construction and installation. At that time, the Executive Secretary shall require 

documentation of the continuous construction and installation of the operation and may 

revoke the AO in accordance with R307-401-11. 

Limitations and Tests Procedures

10. Emissions to the atmosphere at all times from the indicated emission points shall not 

exceed the following rates and concentrations: 
DAQE-AN0033007-04 

Page 5

Source: Batt insulation line (Stack 28 and Stack 65 combined) 

Pollutant lb/ton glass pulled 

TSP ..............................................................................9.00 

PM10 .............................................................................9.00 

Source: ProPink line (Stack 28) 

Pollutant lb/ton glass pulled 

PM10 .......................................................................... 5.00 

11. Stack testing to show compliance with the emission limitations stated in the above 

condition shall be performed as specified below: 

A. Testing 

Emission point Pollutant Frequency

Batt insulation line TSP............................ * 

(Stack #28 & 65) PM10........................... * 

ProPink unbonded loose 

fill line (Stack #28) PM10........................... * 

B. Testing Status (To be applied above) 

* Test every five years. The Executive Secretary may require testing at any time. 

C. Notification

The Executive Secretary shall be notified at least 30 days prior to conducting any 

required emission testing. A source test protocol shall be submitted to DAQ 

when the testing notification is submitted to the Executive Secretary. 

The source test protocol shall be approved by the Executive Secretary prior to 

performing the test(s). The source test protocol shall outline the proposed test 

methodologies, stack to be tested and procedures to be used. A pretest 

conference shall be held, if directed by the Executive Secretary. 

D. Sample Location

The emission point shall be designed to conform to the requirements of 40 CFR 

60, Appendix A, Method 1, or other methods as approved by the Executive 

Secretary. An Occupational Safety and Health Administration (OSHA) or Mine 

Safety and Health Administration (MSHA) approved access shall be provided to 

the test location and the test site. 
DAQE-AN0033007-04 

Page 6

E. Volumetric Flow Rate

 40 CFR 60, Appendix A, Method 2 

F. PM10 Stack Testing Methods

40 CFR 60, Appendix A, Method 5, 5a, 5d, or 5e as appropriate and 40 CFR 51, 

Appendix M, Method 202. 

Method 5 and 202 consists of the addition of filterable 

particulate and the condensable content in the impingers 

(organics and inorganic). 

G. Calculations

To determine the mass emission rates (lb/ton, etc.) the pollutant concentration as 

determined by the appropriate methods shall be multiplied by the volumetric 

flow rate and any necessary conversion factors determined by the Executive 

Secretary to give the results in the specified units of the emission limitation. 

H. New Source Operation

For a new source/emission point, the production rate during all compliance 

testing shall be no less than 90% of the production rate listed in this AO. If the 

maximum AO allowable production rate has not been achieved at the time of the 

test, the following procedure shall be followed: 

1) Testing shall be at no less than 90% of the production rate achieved to 

date. 

2) If the test is passed, the new maximum allowable production rate shall be 

110% of the tested achieved rate, but not more than the maximum 

allowable production rate. This new allowable maximum production rate 

shall remain in effect until successfully tested at a higher rate. 

3) The owner/operator shall request a higher production rate when 

necessary. Testing at no less than 90% of the higher rate shall be 

conducted. A new maximum production rate (110% of the new rate) will 

then be allowed if the test is successful. This process may be repeated 

until the maximum AO production rate is achieved. 

I. Existing Source Operation

For an existing source/emission point, the production rate during all compliance 

testing shall be no less than 90% of the maximum production achieved in the 

previous three (3) years. 

12. Urea and resin mixture shall be held minimum of two hours before adding it to the binder 

mix. 
DAQE-AN0033007-04 

Page 7

13. Free formaldehyde concentration of the resin in the pre-mix tank actively in use for 

binder mixing shall not exceed 1%. 

14. Visible emissions from any stationary point or fugitive emission source associated with 

the source or with the control facilities shall not exceed 10% opacity for fabric filters 

exhaust stacks and 20% for all others. Opacity observations of emissions from 

stationary sources that exhaust to the atmosphere shall be conducted in accordance with 

40 CFR 60, Appendix A, Method 9. 

15. The consumption limit of 1.80 tons of glass melted per hour, averaged over a 12-hour 

period shall not be exceeded. To determine compliance with a rolling 12-month total the 

owner/operator shall calculate a new 12-month total by the twentieth day of each month 

using data from the previous 12 months. Records of consumption shall be kept for all 

periods when the plant is in operation. Consumption shall be determined by production 

records. The records of consumption shall be kept on a daily basis. 

Fuels

16. The owner/operator shall use only natural gas as a primary fuel. 

Federal Limitations and Requirements

17. In addition to the requirements of this AO, all provisions of 40 CFR 60, New Source 

Performance Standards (NSPS) Subparts A and PPP, 40 CFR 60.1 to 60.18 and 40 CFR 

60.680 to 60.685 (Standards of Performance for Wool Fiberglass Insulation 

Manufacturing Plants) apply to this installation. 

Volatile Organic Compound (VOC) and Hazardous Air Pollutants (HAPs) Limitations

18. The plant-wide emissions of VOCs and HAPs from plant production 

operations shall not exceed: 

10.04 tons per rolling 12-month period for VOCs

0.01 tons per rolling 12-month period for Acetaldehyde

8.92 tons per rolling 12-month period for formaldehyde

9.71 tons per rolling 12-month period for methanol

5.41 tons per rolling 12-month period for phenol

0.22 tons per rolling 12-month period for acid gases*

0.30 tons per rolling 12-month period for solid HAPs**

24.57 tons per rolling 12-month period for all HAPs combined

*Acid gases includes hydrogen fluoride and hydrogen chloride 

**Solid HAP include antimony, arsenic, beryllium, cadmium, chromium, cobalt, lead, 

phosphorus, manganese, and nickel 

Compliance with each/the limitation shall be determined on a rolling 12-month total. 

Based on the twentieth day of each month, a new 12-month total shall be calculated using 

data from the previous 12 months. 
DAQE-AN0033007-04 

Page 8

The plant-wide emissions of VOC and HAP emitted to the atmosphere shall be 

determined by maintaining a record of VOC potential and HAP potential contained in 

materials used each month. The record shall include the following data for each item 

used: 

A. Name of the VOC and HAP emitting material, such as: binder, batch, glass pull, 

finished product, etc. 

B. The unit ratio of each VOC and HAP emitting material per unit of product 

manufactured. 

C. The amount of product manufactured on a monthly basis. 

D. Amount and location of materials containing VOC and HAP used on a monthly 

basis and summed for every location and for the entire plant each month. 

E. To calculate the above emissions based on product weight manufactured by using 

the general procedure below: 

VOC (tons) = Unit Ratio of Product (lb VOC) x tons of production x 1 ton 

ton production 2000 lbs 

HAP (tons) = Unit Ratio of Product (lb HAP) x tons of production x 1 ton 

ton production 2000 lbs 

F. Records of consumption of VOC and HAP shall be kept for all periods when the 

plant is in operation. 

Records & Miscellaneous

19. Records of hold-time for urea-resin mixture for each mix before adding to the binder mix 

shall be maintained. 

20. Owens Corning’s Salt Lake City Plant shall test free formaldehyde concentration in the 

resin pre-mix tank at least once every calendar month. Records of free formaldehyde 

concentration in the resin pre-mix tank for each batch of mix tested shall be maintained. 

21. At all times, including periods of startup, shutdown, and malfunction, owners and 

operators shall, to the extent practicable, maintain and operate any equipment approved 

under this AO including associated air pollution control equipment in a manner consistent 

with good air pollution control practice for minimizing emissions. Determination of 

whether acceptable operating and maintenance procedures are being used will be based on 

information available to the Executive Secretary which may include, but is not limited to, 

monitoring results, opacity observations, review of operating and maintenance 

procedures, and inspection of the source. All maintenance performed on equipment 

authorized by this AO shall be recorded. 

22. The owner/operator shall comply with R307-150 Series. Inventories, Testing and 

Monitoring. 
DAQE-AN0033007-04 

Page 9

23. The owner/operator shall comply with R307-107. General Requirements: Unavoidable 

Breakdowns. 

The Executive Secretary shall be notified in writing if the company is sold or changes its name. 

This AO in no way releases the owner or operator from any liability for compliance with all other 

applicable federal, state, and local regulations including R307. 

A copy of the rules, regulations and/or attachments addressed in this AO may be obtained by contacting

the Division of Air Quality (DAQ). The Utah Administrative Code R307 rules used by DAQ, the NOI 

guide, and other air quality documents and forms may also be obtained on the Internet at the following

web site: http://www.deq.state.ut.us/eqair/aq_home.htm

The annual emission estimations below include point source and fugitive emissions, and do not include 

fugitive dust, road dust, tail pipe emissions and grandfathered emissions. These emissions are for the 

purpose of determining the applicability of Prevention of Significant Deterioration, non-attainment area, 

maintenance area, and Title V source requirements of the R307. They are not to be used for determining 

compliance. 

The Potential To Emit (PTE) emissions for the Owens Corning plant are currently calculated at the 

following values: 

Pollutant Tons/yr

A. PM10 .................................................................69.93 

B. SO2 .................................................................... 8.22 

C. NOx ..................................................................17.62 

D. CO....................................................................42.37 

E. VOC (excluding HAPs)...................................10.04 

F. Ammonia .........................................................30.94 

G. HAPs 

Acetaldehyde..................................0.01 

formaldehyde..................................8.92 

methanol.........................................9.71 

phenol.............................................5.41 

acid gases*......................................0.22 

solid HAPs**..................................0.30 

Total HAPs .....................................................24.57 

* Acid gases includes hydrogen fluoride and hydrogen chloride 

** Solid HAPs include antimony, arsenic, beryllium, cadmium, chromium, cobalt, lead, phosphorus, 

manganese, and nickel 

Approved By: 

Richard W. Sprott, Executive Secretary 

Utah Air Quality Board