DAQ-2024-011941

DAQE-AN123660004-24

{{$d1 }}

Darren Lueckler
Solar Temp Fiberglass Incorporated
1870 Bluff Ridge Drive
Syracuse, UT 84075
[e-mail]

Dear Mr. Lueckler:

Re: Approval Order: Administrative Amendment to Approval Order DAQE-AN0123660001-08 for a
10-Year Review and Permit Updates
Project Number: N123660004

The attached Approval Order (AO) is issued pursuant to the Division of Air Quality conducting a
10-year administrative review of this source and its respective AO. Solar Temp Fiberglass
Incorporated must comply with the requirements of this AO, all applicable state requirements (R307), and
Federal Standards.

The project engineer for this action is Katie Andersen, who can be contacted at [phone] or
[e-mail]. Future correspondence on this AO should include the engineer's name as well as
the DAQE number shown on the upper right-hand corner of this letter.

Sincerely,

{{$s }}

Bryce C. Bird
Director

BCB:KA:jg

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

December 5, 2024

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

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APPROVAL ORDER
DAQE-AN123660004-24
Administrative Amendment to Approval Order
DAQE-AN0123660001-08 for a 10-Year Review
and Permit Updates

Prepared By
Katie Andersen, Engineer
[phone]
[e-mail]

Issued to
Solar Temp Fiberglass Incorporated - Fiberglass Composite Manufacturing
Plant

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality
December 5, 2024

TABLE OF CONTENTS

TITLE/SIGNATURE PAGE ....................................................................................................... 1
GENERAL INFORMATION ...................................................................................................... 3
CONTACT/LOCATION INFORMATION ............................................................................... 3
SOURCE INFORMATION ........................................................................................................ 3
General Description ................................................................................................................ 3
NSR Classification .................................................................................................................. 3
Source Classification .............................................................................................................. 3
Applicable Federal Standards ................................................................................................. 3
Project Description.................................................................................................................. 3
SUMMARY OF EMISSIONS .................................................................................................... 4
SECTION I: GENERAL PROVISIONS .................................................................................... 4
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 5
PERMIT HISTORY ..................................................................................................................... 6
ACRONYMS ................................................................................................................................. 7

DAQE-AN123660004-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Solar Temp Fiberglass Incorporated Solar Temp Fiberglass Incorporated - Fiberglass Composite Manufacturing Plant

Mailing Address Physical Address
1870 Bluff Ridge Drive 2401 South Redwood Road
Syracuse, UT 84075 Woods Cross, UT 84087

Source Contact UTM Coordinates
Name: Darren Lueckler 421,719 m Easting
Phone: [phone],524,186 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12
SIC code 3089 (Plastics Products, NEC)

SOURCE INFORMATION
General Description
Solar Temp Fiberglass Incorporated (Solar Temp) is a fiberglass composite manufacturing plant located
in Woods Cross, Davis County. Approved equipment on site consists of one (1) gelcoater, one (1)
chopper gun, one (1) grinder, and two (2) natural gas comfort heating units. To create the fiberglass
composite products, Solar Temp begins by spraying a mold with gelcoat (paint). When the gelcoat is dry,
the mold is sprayed with the chopper gun and a resin mixture. The fiberglass is rolled out by hand to
remove any air bubbles, and excess fiberglass is trimmed off. The parts cure for 24 hours and then are
removed from the mold. Excess material is ground off, and the product is ready for shipment.

NSR Classification
10-Year Review

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA
Davis County
Airs Source Size: B

Applicable Federal Standards
None
Project Description
This is a 10-Year Review to update the language, format, and layout of the Approval Order to match
current DAQ permitting standards.
DAQE-AN123660004-24
Page 4

SUMMARY OF EMISSIONS

The emissions listed below are an estimate of the total potential emissions from the source. Some
rounding of emissions is possible.

Criteria Pollutant Change (TPY) Total (TPY)
Carbon Monoxide 0 0.00
Nitrogen Oxides 0 0.00
Particulate Matter - PM10 0 0.00
Particulate Matter - PM2.5 0 0.00
Sulfur Dioxide 0 0.00
Volatile Organic Compounds 0 4.12

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Dimethyl Phthalate (CAS #131113) 0 0
Ethyl Benzene (CAS #100414) 0 0
Methyl Methacrylate (CAS #80626) 0 160
Styrene (CAS #100425) 0 6000
Xylenes (Isomers And Mixture) (CAS #1330207) 0 0
Change (TPY) Total (TPY)
Total HAPs 0 3.08

SECTION I: GENERAL PROVISIONS

I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101]
I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]
I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1]
I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request. Unless otherwise specified in this AO or in other applicable state and federal rules, records
shall be kept for a minimum of two (2) years. [R307-401-8]
I.5 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 Director 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. [R307-401-4]
I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107]

DAQE-AN123660004-24
Page 5

I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150]

SECTION II: PERMITTED EQUIPMENT
II.A THE APPROVED EQUIPMENT
II.A.1 Solar Temp Fiberglass Incorporated Fiberglass Composite Manufacturing Plant
II.A.2 One (1) Gelcoater II.A.3 One (1) Chopper Gun
II.A.4 One (1) Grinder Listed for informational purposes. II.A.5 Two (2) Comfort Heating Units Rating: <5 MMBtu/hr (each) Fuel: Natural Gas Listed for informational purposes.

SECTION II: SPECIAL PROVISIONS
II.B REQUIREMENTS AND LIMITATIONS
II.B.1 Site-wide Requirements II.B.1.a The owner/operator shall not allow visible emissions from any source on site to exceed 10% opacity. [R307-401-8]
II.B.1.a.1 Opacity observations of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. [R307-401-8] II.B.1.b The owner/operator shall only use natural gas as fuel in the natural gas comfort heating units. [R307-401-8]
II.B.2 VOC & HAP Requirements II.B.2.a The owner/operator shall not emit more than the following from evaporative sources (painting, printing, coating, and/or cleaning) on site: 4.12 tons per rolling 12-month period of VOCs 160.00 pounds per rolling 12-month period of Methyl Methacrylate 6,000.00 pounds per rolling 12-month period of Styrene 6,160.00 pounds per rolling 12-month period of all HAPs combined. [R307-401-8]
DAQE-AN123660004-24
Page 6

II.B.2.a.1 To determine compliance with the rolling 12-month total, the owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Monthly calculations shall be made no later than 20 days after the end of each calendar month. [R307-401-8]
II.B.2.a.2 The owner/operator shall determine VOC and HAP emissions by maintaining a record of VOC- and HAP-emitting materials used each month. Emission calculations shall be made in accordance with 40 CFR 63 Subpart WWWW (National Emissions Standards for Hazardous Air Pollutants:
Reinforced Plastic Composites Production), though the source is not subject to the requirements of this subpart. [R307-401-8]
II.B.2.b The owner/operator shall cover any containers storing VOC/HAP materials when the materials are not in use. [R307-401-8]
PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents: Supersedes AO DAQE-AN0123660001-08 dated February 29, 2008

DAQE-AN123660004-24
Page 7

ACRONYMS

The following lists commonly used acronyms and associated translations as they apply to this document:

40 CFR Title 40 of the Code of Federal Regulations
AO Approval Order
BACT Best Available Control Technology
CAA Clean Air Act
CAAA Clean Air Act Amendments
CDS Classification Data System (used by Environmental Protection Agency to classify
sources by size/type)
CEM Continuous emissions monitor
CEMS Continuous emissions monitoring system
CFR Code of Federal Regulations
CMS Continuous monitoring system
CO Carbon monoxide
CO2 Carbon Dioxide
CO2e Carbon Dioxide Equivalent - Title 40 of the Code of Federal Regulations Part 98,
Subpart A, Table A-1
COM Continuous opacity monitor
DAQ/UDAQ Division of Air Quality
DAQE This is a document tracking code for internal Division of Air Quality use
EPA Environmental Protection Agency
FDCP Fugitive dust control plan
GHG Greenhouse Gas(es) - Title 40 of the Code of Federal Regulations 52.21 (b)(49)(i)
GWP Global Warming Potential - Title 40 of the Code of Federal Regulations Part 86.1818-
12(a)
HAP or HAPs Hazardous air pollutant(s)
ITA Intent to Approve
LB/YR Pounds per year MACT Maximum Achievable Control Technology MMBTU Million British Thermal Units NAA Nonattainment Area NAAQS National Ambient Air Quality Standards NESHAP National Emission Standards for Hazardous Air Pollutants NOI Notice of Intent
NOx Oxides of nitrogen
NSPS New Source Performance Standard
NSR New Source Review
PM10 Particulate matter less than 10 microns in size
PM2.5 Particulate matter less than 2.5 microns in size
PSD Prevention of Significant Deterioration
PTE Potential to Emit
R307 Rules Series 307
R307-401 Rules Series 307 - Section 401
SO2 Sulfur dioxide
Title IV Title IV of the Clean Air Act
Title V Title V of the Clean Air Act
TPY Tons per year
UAC Utah Administrative Code
VOC Volatile organic compounds

DAQE-
RN123660004 November 12, 2024 Darren Lueckler Solar Temp Fiberglass Incorporated 1870 Bluff Ridge Drive Syracuse, UT 84075 [e-mail] Dear Darren Lueckler, Re: Engineer Review: Administrative Amendment to AO DAQE-AN0123660001-08 for a 10-Year Review and Permit Updates Project Number: N123660004 The DAQ requests a company representative review and sign the attached Engineer Review (ER). This ER identifies all applicable elements of the New Source Review (NSR) permitting program. Solar Temp Fiberglass Incorporated should complete this review within 10 business days of receipt. Solar Temp Fiberglass Incorporated should contact Katie Andersen at [phone] if there are questions or concerns with the review of the draft permit conditions. Upon resolution of your concerns, please email Katie Andersen at [e-mail] the signed cover letter. Upon receipt of the signed cover letter, the DAQ will prepare an Approval Order (AO) for signature by the DAQ Director. If Solar Temp Fiberglass Incorporated does not respond to this letter within 10 business days, the project will move forward without source concurrence. If Solar Temp Fiberglass Incorporated has concerns that cannot be resolved and the project becomes stagnant, the DAQ Director may issue an Order prohibiting construction. Approval Signature _____________________________________________________________ (Signature & Date)
195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone] www.deq.utah.gov Printed on 100% recycled paper
Department of Environmental Quality
Kimberly D. Shelley Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director
State of Utah
SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 1
UTAH DIVISION OF AIR QUALITY ENGINEER REVIEW
SOURCE INFORMATION Project Number N123660004 Owner Name Solar Temp Fiberglass Incorporated Mailing Address 1870 Bluff Ridge Drive Syracuse, UT, 84075 Source Name Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant Source Location 2401 S Redwood Rd Woods Cross, UT 84087-2309 UTM Projection 421,719 m Easting, 4,524,186 m Northing UTM Datum NAD83 UTM Zone UTM Zone 12 SIC Code 3089 (Plastics Products, NEC) Source Contact Darren Lueckler Phone Number [phone] Email [e-mail] Billing Contact Darren Lueckler Phone Number [phone] Email [e-mail] Project Engineer Katie Andersen, Engineer Phone Number [phone] Email [e-mail] Notice of Intent (NOI) Submitted August 14, 2024 Date of Accepted Application September 27, 2024

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 2
SOURCE DESCRIPTION General Description Solar Temp Fiberglass Inc (Solar Temp) is a fiberglass composite manufacturing plant located in Woods Cross, Davis County. Approved equipment on site consists of one (1) gelcoater, one (1) chopper gun, one (1) grinder, and two (2) natural gas comfort heating units. To create the fiberglass composite products, Solar Temp begins by spraying a mold with gelcoat (paint). When the gelcoat is dry, the mold is sprayed with the chopper gun and a resin mixture. The fiberglass is rolled out by hand to remove any air bubbles and excess fiberglass is trimmed off. The parts cure for 24 hours and then are removed from the mold. Excess material is grinded off and the product is ready for shipment. NSR Classification: 10 Year Review Source Classification Located in the Northern Wasatch Front O3 NAA and Salt Lake City UT PM2.5 NAA Davis County Airs Source Size: B Applicable Federal Standards None. Project Proposal Administrative Amendment to AO DAQE-AN0123660001-08 for a 10-Year Review and Permit Updates Project Description This is a 10-Year Review to update the language, format, and layout of the Approval Order to match current DAQ permitting standards. EMISSION IMPACT ANALYSIS
This is a 10-Year Review to update the format, layout, and language of the permit to match current DAQ standards. There are no changes to equipment and no emission increases at this time. Thus, modeling is not required. [Last updated October 1, 2024]

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 3
SUMMARY OF EMISSIONS The emissions listed below are an estimate of the total potential emissions from the source. Some rounding of emissions is possible. Criteria Pollutant Change (TPY) Total (TPY)
Carbon Monoxide 0 0.00
Nitrogen Oxides 0 0.00 Particulate Matter - PM10 0 0.00 Particulate Matter - PM2.5 0 0.00 Sulfur Dioxide 0 0.00
Volatile Organic Compounds 0 4.12 Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr) Dimethyl Phthalate (CAS #131113) 0 0
Ethyl Benzene (CAS #100414) 0 0
Methyl Methacrylate (CAS #80626) 0 160 Styrene (CAS #100425) 0 6000 Xylenes (Isomers And Mixture) (CAS #1330207) 0 0 Change (TPY) Total (TPY)
Total HAPs 0 3.08
Note: Change in emissions indicates the difference between previous AO and proposed modification.
Commented [KA1]: Manually enter zeros

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 4
Review of BACT for New/Modified Emission Units 1. BACT review regarding 10-Year Review This is a 10-Year Review to update the format, layout, and language of the permit to match current DAQ standards. There are no changes to equipment and no emission increases at this time. Thus, a BACT analysis is not required. [Last updated October 1, 2024]
SECTION I: GENERAL PROVISIONS The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101] I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401] I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1] I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by the owner/operator, shall be made available to the Director or Director's representative upon request, and the records shall include the two-year period prior to the date of the request. Unless otherwise specified in this AO or in other applicable state and federal rules, records shall be kept for a minimum of two (2) years. [R307-401-8] I.5 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 Director 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. [R307-401-4] I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107]
I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150]

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 5
SECTION II: PERMITTED EQUIPMENT The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): II.A THE APPROVED EQUIPMENT II.A.1 Solar Temp Fiberglass Inc. Fiberglass Composite Manufacturing Plant
II.A.2 One (1) Gelcoater II.A.3 One (1) Chopper Gun II.A.4 One (1) Grinder Listed for informational purposes.
II.A.5 Two (2) Comfort Heating Units Rating: <5 MMBtu/hr (each) Fuel: Natural Gas Listed for informational purposes.
SECTION II: SPECIAL PROVISIONS The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): II.B REQUIREMENTS AND LIMITATIONS II.B.1 NEW Site-wide Requirements
II.B.1.a NEW The owner/operator shall not allow visible emissions from any source on site to exceed 10% opacity. [R307-401-8] II.B.1.a.1 NEW Opacity observations of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. [R307-401-8] II.B.1.b NEW The owner/operator shall only use natural gas as fuel in the natural gas comfort heating units. [R307-401-8] II.B.2 NEW VOC & HAP Requirements
Commented [KA2]: No NEW Equipment. Remove “NEW”

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 6
II.B.2.a NEW The owner/operator shall not emit more than the following from evaporative sources (painting, printing, coating, and/or cleaning) on site: 4.12 tons per rolling 12-month period of VOCs 160.00 pounds per rolling 12-month period of Methyl Methacrylate 6,000.00 pounds per rolling 12-month period of Styrene 6,160.00 pounds per rolling 12-month period of all HAPs combined. [R307-401-8] II.B.2.a.1 NEW To determine compliance with the rolling 12-month total, the owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Monthly calculations shall be made no later than 20 days after the end of each calendar month. [R307-401-8] II.B.2.a.2 NEW The owner/operator shall determine VOC and HAP emissions by maintaining a record of VOC and HAP emitting materials used each month. Emission calculations shall be made in accordance with 40 CFR 63 Subpart WWWW (National Emissions Standards for Hazardous Air Pollutants: Reinforced Plastic Composites Production), though the source is not subject to the requirements of this subpart. [R307-401-8] II.B.2.b NEW The owner/operator shall cover any containers storing VOC/HAP materials when the materials are not in use. [R307-401-8]

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 7
PERMIT HISTORY When issued, the approval order shall supersede (if a modification) or will be based on the following documents: Supersedes AO DAQE-AN0123660001-08 dated February 29, 2008
REVIEWER COMMENTS 1. Comment regarding 10-Year Review: This is a 10-Year Review to update the approval to match the current format, layout, and language standards of DAQ Approval Orders. The following changes have been made to the permit as a result of the 10-Year Review: the mailing and billing address has been updated, the general provisions have been consolidated into one location, and Condition 10 in AO DAQE-AN0123660001-08 has been separated into multiple conditions, see II.B.2. Solar Temp Fiberglass no longer uses materials that contain dimethyl phthalate, ethyl benzene, or xylenes. The Emission Summary Table has been updated to reflect this change in materials used. In Condition II.B.2.a.2, the source is required to determine VOC and HAP emissions in accordance with 40 CFR 63 Subpart WWWW, though the source is not subject to the requirements of this subpart. This subpart applies to facilities that are major sources of HAP emissions, which the Solar Temp Fiberglass Inc facility is not. The subpart provides equations to calculate HAP emissions though various open molding and centrifugal casting process streams. These equations are more specific than the standard language DAQ uses to determine VOC and HAP emissions. Thus, the source is required to determine VOC and HAP emissions through 40 CFR 63 WWWW. [Last updated October 31, 2024] 2. Comment regarding Title V Applicability: Title V of the 1990 Clean Air Act (Title V) applies to the following: 1. Any major source; 2. Any source subject to a standard, limitation, or other requirement under Section 111 of the Act, Standards of Performance for New Stationary Sources; 3. Any source subject to a standard or other requirement under Section 112 of the Act, Hazardous Air Pollutants; 4. Any Title IV affected source. This source is not a major source nor a Title IV source. The source is not subject to 40 CFR 60 (NSPS), 40 CFR 63 (MACT), or 40 CFR 61 (NESHAP) regulations. Thus, the source is not subject to Title V. [Last updated September 27, 2024]

Engineer Review N123660004: Solar Temp Fiberglass Incorporated- Fiberglass Manufacturing Plant October 31, 2024 Page 8
ACRONYMS The following lists commonly used acronyms and associated translations as they apply to this document: 40 CFR Title 40 of the Code of Federal Regulations AO Approval Order BACT Best Available Control Technology CAA Clean Air Act CAAA Clean Air Act Amendments CDS Classification Data System (used by EPA to classify sources by size/type) CEM Continuous emissions monitor CEMS Continuous emissions monitoring system CFR Code of Federal Regulations CMS Continuous monitoring system CO Carbon monoxide CO2 Carbon Dioxide CO2e Carbon Dioxide Equivalent - 40 CFR Part 98, Subpart A, Table A-1 COM Continuous opacity monitor DAQ/UDAQ Division of Air Quality DAQE This is a document tracking code for internal UDAQ use EPA Environmental Protection Agency FDCP Fugitive dust control plan GHG Greenhouse Gas(es) - 40 CFR 52.21 (b)(49)(i) GWP Global Warming Potential - 40 CFR Part 86.1818-12(a) HAP or HAPs Hazardous air pollutant(s) ITA Intent to Approve LB/HR Pounds per hour LB/YR Pounds per year MACT Maximum Achievable Control Technology MMBTU Million British Thermal Units NAA Nonattainment Area NAAQS National Ambient Air Quality Standards NESHAP National Emission Standards for Hazardous Air Pollutants NOI Notice of Intent NOx Oxides of nitrogen NSPS New Source Performance Standard NSR New Source Review PM10 Particulate matter less than 10 microns in size PM2.5 Particulate matter less than 2.5 microns in size PSD Prevention of Significant Deterioration PTE Potential to Emit R307 Rules Series 307 R307-401 Rules Series 307 - Section 401 SO2 Sulfur dioxide Title IV Title IV of the Clean Air Act Title V Title V of the Clean Air Act TPY Tons per year UAC Utah Administrative Code VOC Volatile organic compounds

DAQC-106-21
Site ID 12366 (B1)
MEMORANDUM
TO: FILE — SOLAR TEMP INC. eiDTHROUGH: Rik Ombach, Minor Source Compliance Section Manager
FROM: Irene Tucker, Environmental Scientist g
DATE: January 22, 2021
SUBJECT: Full Compliance Evaluation, Minor, Davis County
INSPECTION DATE: November 5, 2020, January 22, 2021
SOURCE LOCATION: 2401 South Redwood Road, Woods Cross, Davis County, Utah
SOURCE CONTACT: Darren Lueckler, Owner: 801-860-2522,
[e-mail]
OPERATING STATUS: In operation.
PROC
E
S
S

D
E
S
C
R
I
P
T
I
O
N
:

DAQ
C-
20
21-
001981
Solar Temp is a Fiberglass composite manufacturing plant. The
equipment used includes a gel coater, chopper gun and a grinder.
Fiberglass process:
1. Spray open mold with gelcoat (paint) using gelcoat
equipment.
2. Once gelcoat is dry, spray with chopper gun/resin mixture.
3. Roll out fiberglass by hand to remove any air bubbles.
4. Trim off excess fiberglass.
5. Parts cure for 24 hours.
6. Pull fiberglass parts, grind off excess material.
Prepared molds are sprayed with an external color gelcoat. The
gel coater mixes the gelcoat and catalyst together at the gun tip.
After the gelcoat on the mold has dried, each mold is sprayed
with a chopper gun which internally mixes polyester resin,
catalyst and chop strands of plastic together. After the sprayed
mold material has dried the molds are moved to the trimming
area where each mold is trimmed of excess plastic material. The
molds are then allowed to cure for 24 hours. After 24 hours the
products are removed from the molds, taken to the grinding
room where they are ground smooth. If the products are without
flaws they are ready for shipping or customer pick-up.
1
APPLICABLE REGULATIONS: AO dated February 29, 2008 DAQE-AN0123660001-08
SOURCE EVALUATION:
1. This AO applies to the following company:
Office Location
Solar Temp Inc.
2401 South Redwood Road
Woods Cross, UT 84087
Phone Number: 801-292-3770
Fax Number: 801-292-7055
The equipment listed in this AO shall be operated at the following location:
2401 South Redwood Road, Woods Cross, UT 84087, Davis County
Universal Transverse Mercator (UTM) Coordinate System: UTM Datum NAD27 4,523.889 km
Northing, 421.697 km Easting, Zone 12
Status: In compliance. The above information is correct.
2. All defmitions, terms, abbreviations, and references used in this AO conform to those used in the
UAC 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.
Status: This is not a compliance issue.
3. The limits set forth in this AO shall not be exceeded without prior approval in accordance with
R307-401.
Status: In compliance. Solar Temp did not exceed any limits set forth in this AO.
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.
Status: In compliance. There has been no modification in equipment or processes as approved by this
AO at Solar Temp.
5. All records referenced in this AO, 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.
Records shall be kept for a minimum of two years.
Status: In compliance. Solar Temp maintains records for a minimum of two years.
6. Solar Temp shall operate the reinforced plastic manufacturing plant in accordance with the terms
and conditions of this AO, which was written pursuant to Solar Temp's Notice of Intent (NOI)
submitted to the Division of Air Quality (DAQ) on December 3, 2007.
Status: In compliance. Solar Temp acknowledges operating the plant in compliance with and as
required with this AO.
2
7. The approved installations shall consist of the following equipment or equivalent*:
A. One (1) gelcoater
B. One (1) chopper gun
C. One Grinder**
D. Two natural gas comfort heating units**
* Equivalency shall be determined by the Executive Secretary.
** This equipment is listed for informational purposes only. There are negligible
emissions from this equipment.
Status: In compliance. There were no new or unapproved equipment identified onsite during this
inspection.
8. Visible emissions from any emission point shall not exceed 10% opacity. Opacity observations
of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A,
Method 9.
Status: In compliance. There were no visible emissions observed during this inspection. See the
attachment for additional information. The opacity observations was conducted according to
40 CFR 60, Appendix A, Method 9.
9. The owner/operator shall use natural gas as fuel in the natural gas comfort heating units.
Status: In compliance. Only natural gas is used in the heating units at Solar Temp.
10. The plant-wide emissions of VOCs and HAPs from the fiberglass manufacturing plant and
associated operations shall not exceed:
4.12 tons per rolling 12-month period for VOCs
3.0 pounds per rolling 12-month period for Dimethyl Phthalate
800.00 pounds per rolling 12-month period for Ethyl Benzene
160.00 pounds per rolling 12-month period for Methyl Methacrylate
6000.00 pounds per rolling 12-month period for Styrene
1280 pounds per rolling 12-month period for Xylene
8243 pounds per rolling 12-month period for all HAP combined
Compliance with each of the limitations shall be determined on a rolling 12-month total. Based on
the last day of each month, a new 12-month total shall be calculated using data from the previous
12 months. Monthly calculations shall be made no later than 20 days after the end of each calendar
month.
The VOC and HAP emissions shall be determined by maintaining a record of VOC and HAP
emitting materials used each month. Emission calculations shall be made in accordance with 40
CFR 63 Subpart WWWW (National Emissions Standards for Hazardous Air Pollutants:
Reinforced Plastic Composites Production), although the source is not subject to the requirements
of this subpart.
3
Status: In Compliance. The rolling 12-month emissions from December 2019 to November 2020
indicated the following:
0.94 tons of VOC
73.75 lbs of Methyl Methacrylate
1,809.93 lbs of Styrene
1421.14 lbs for all HAP combined
Solar Temp no longer uses Dimethyl phthalate, Xylene, and Ethyl Benzene. Solar Temp
maintains a monthly record of VOC and HAP as required by this AO Condition.
11. Any containers storing VOC/HAP materials shall be covered when not in use.
Status In compliance. Solar Tenip stores all VOC/HAP materials in closed containers as required by
this AO.
12. At all times, including periods of startup, shutdown, and malfunction, owner/operator 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 the 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 the equipment authorized by this AO shall be recorded.
Status: In compliance. According to Solar Temp, any equipment with maintenance problems is
quickly shipped off to the manufacturer for swifi replacement. Compliance assistance provided
to Solar Teinp to maintain records when equipment is replaced.
13. The owner/operator shall comply with R307-107. General Requirements: Unavoidable
Breakdowns.
Status: In compliance. According to Solar Temp, there have been no unavoidable breakdowns since
the last inspection.
AREA SOURCE RULES
The following Area Source Rules were evaluated during this inspection:
Rule R307-305. Nonattainment and Maintenance Areas for PM10: Emission Standards
In compliance. There were no visible emissions observed during the inspection. See the attachment for
additional information.
Area Source Rules on R307-353 Plastic Parts and Coatings
Not applicable. Solar Temp indicated that their processes do not involve plastic parts and coatings.
EMISSION INVENTORY: Solar Temp is not required to submit an Emissions Inventory
Report. The emissions released indicated compliance with the
PTE of this AO.
4
The calculated emissions from the engineering review indicated
below:
Pollutant Tons/yr
VOC 4.12
HAPS 4.12
PREVIOUS ENFORCEMENT
ACTIONS: None in the last five years.
COMPLIANCE STATUS &
RECOMMENDATIONS: Solar Temp is in compliance with the conditions of AO DAQE-
AN0123660001-08, dated February 29, 2008.
RECOMMENDATION FOR
NEXT INSPECTION: Inspect as usual.
ATTACHMENT: Visible Emission Observation Form
5
STATE OF UTAH, DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF AIR QUALITY
9 — VISIBLE EMISSION OBSERVATION FORM
RVATION DATE:
Start time: (
EPA MET
Page of ____
Street Address:
City/County:
Facility:
Equipment/Process:
Emission P int:
Sky Conditions:
Precipitation: No yYes [ ]
Wind: Direction: Speed: mph
Ambient Temp: oF .RH:
Height Relative to Observer:
Distance From Observer:
Condensed Water Vapor Present: No [ 1 Yes [ ]
Attached [ ] Detached [ ]
Length of Condensed Water Vapor Plume:
Background:
Sketch process unit: indicate observer position relative to
source; indicate potential emission points and/or actual
emission points.
0 15 30 45
1
0 2
4 \ I/
5
6
7
8
9
10
11
12
COMMENTS:
I have received a copy of these observations:
SIGNATURE:
Printed Name:
Title:
,t)iu
Partly Cloudy [ Over C)ar
Sun 0---.\7-101''Vincl
Observer Positio
• observer
140.
nt with ume
Observer's Signature.
Distrib: white-file; canary-inspector; pink-owner/operator
r
Katie Andersen <[e-mail]>
DAQ Approval Order Update
2 messages
Katie Andersen <[e-mail]>Tue, Oct 1, 2024 at 10:13 AM
To: [e-mail]
Hi Darren,
Thank you for taking my phone call last week regarding updating the Solar Temp Fiberglass Approval Order, DAQE-
AN0123660001-08. The purpose of this project is to update the contact information, equipment, layout, language, and
format of the permit.
I would like to confirm the information we discussed over the phone. Will you please let me know if the following
information is incorrect?
1. You are the main source contact. Your email is [e-mail] and your phone number is 801-860-
2522.
2. The physical address is 2401 S Redwood Rd Woods Cross, Utah, 84087.
3. The mailing/billing address is 1870 Bluff Ridge Drive Syracuse, Utah, 84075.
4. The equipment on site consists of: one (1) gelcoater, one (1) chopper gun, one(1) grinder, and two (2) comfort heating
units.

5. Solar Temp no longer uses materials that contain Dimethyl Phthalate, Ethyl Benzene, or Xylenes. Would you like to
remove these chemicals from the Approval Order if you no longer use them and have no plans to use them in the future?
I appreciate your assistance.
Cheers,
Katie Andersen
--

Katie Andersen
Engineering Technician I | Minor NSR Section
M: [phone]
airquality.utah.gov
Darren Lueckler <[e-mail]>Tue, Oct 1, 2024 at 12:07 PM
To: Katie Andersen <[e-mail]>
Katie,
Everything is correct, thanks for the update.
10/1/24, 1:33 PM State of Utah Mail - DAQ Approval Order Update
https://mail.google.com/mail/u/0/?ik=0900585596&view=pt&search=all&permthid=thread-a:r-8531789244589781610&simpl=msg-a:r20402467783708…1/2
Darren
Sent from my iPhone
On Oct 1, 2024, at 10:13 AM, Katie Andersen <[e-mail]> wrote:
[Quoted text hidden]
10/1/24, 1:33 PM State of Utah Mail - DAQ Approval Order Update
https://mail.google.com/mail/u/0/?ik=0900585596&view=pt&search=all&permthid=thread-a:r-8531789244589781610&simpl=msg-a:r20402467783708…2/2