DAQ-2024-008397

DAQE-AN104020060-24

{{$d1 }}

Kris Blauer
Northrop Grumman Systems Corporation
M/S F/1/EV
P.O. Box 98
Magna, UT 84044-0098
[e-mail]

Dear Mr. Blauer:

Re: Approval Order: Modification to Approval Order to DAQE-AN104020059-22, Project Prime at
the Bacchus Works Facility
Project Number: N104020060

The attached Approval Order (AO) is issued pursuant to the Notice of Intent (NOI) received on
September 12, 2023. Northrop Grumman Systems Corporation must comply with the requirements of
this AO, all applicable state requirements (R307), and Federal Standards.

The project engineer for this action is Tad Anderson, 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. Public comments were received
and considered on this action.

Sincerely,

{{$s }}

Bryce C. Bird
Director

BCB:TA:jg

cc: Salt Lake County Health Department

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

June 5, 2024

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

{{#s=Sig_es_:signer1:signature}}
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APPROVAL ORDER
DAQE-AN104020060-24
Modification to Approval Order to DAQE -AN104020059-22
Project Prime at the Bacchus Works Facility

Prepared By
Tad Anderson, Engineer
[phone]
[e-mail]

Issued to
Northrop Grumman Systems Corporation - Bacchus Works- Plant 1 NIROP
Bacchus West

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality
June 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.................................................................................................................. 4
SUMMARY OF EMISSIONS .................................................................................................... 5
SECTION I: GENERAL PROVISIONS .................................................................................... 6
SECTION II: PERMITTED EQUIPMENT .............................................................................. 6
SECTION II: SPECIAL PROVISIONS ..................................................................................... 9
PERMIT HISTORY ................................................................................................................... 14
ACRONYMS ............................................................................................................................... 15

DAQE-AN104020060-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Northrop Grumman Systems Corporation Northrop Grumman Systems Corporation -
Bacchus Works - Plant 1 NIROP Bacchus West

Mailing Address Physical Address
M/S F/1/EV
P.O. Box 98
Magna, UT 84044-0098
5000 South 8400 West
West Valley City, UT 84044

Source Contact UTM Coordinates
Name: Allia Abdallah 409,700 m Easting
Phone: [phone],502,100 m Northing
Email: [e-mail] Datum NAD27
UTM Zone 12

SIC code 3761 (Guided Missiles & Space Vehicles)

SOURCE INFORMATION
General Description
Northrop Grumman Systems Corporation (NGSC) operates the Bacchus site, an existing rocket
propulsion plant in West Valley City, Salt Lake County. The NGSC Bacchus site manufactures solid-fuel
rocket motors for NASA and the Department of Defense. The manufacturing operations at this plant
include rocket case preparation buildings, cyclotetramethylene-tetranitramine (HMX) grinding and drying
processes for making solid rocket fuel, propellant sampling and machining, and an open burning ground
for the routine burning of explosive and flammable wastes.

NSR Classification
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA, Salt Lake County SO2
NAA
Salt Lake County
Airs Source Size: SM

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
DAQE-AN104020060-24
Page 4

NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
MACT (Part 63), CCCCCC: National Emission Standards for Hazardous Air Pollutants for
Source Category: Gasoline Dispensing Facilities

Project Description
NGSC has requested to install Project Prime, which includes new buildings and equipment to support
increased rocket motor manufacturing at the Bacchus work site located in West Valley City. The Project
Prime consists of adding to the existing Cast and Cure operations (adding Cast Cure 3 (CC3-building
2617) and Cast Cure 4 (CC4-building 2618) as part of the Cast Cure Complex), adding to the existing
Mix Bowl Cleaning operations (adding Mix Bowl Cleaning 4 (MBC4-buildings 2609 and 2610)), adding
to the existing Finishing operations (adding Finishing 8 (FIN8-building 2613)), adding to the existing
Shipping operations (adding Shipping 6 (SHIP6-building 2611)), adding a Pre-Batch Storage Building
(building 2603), increasing operations in the Pre-Mix Process (building 10A), and adding fiberglass
cutting operations to the existing building 17A.

The new CC3 and CC4 buildings will be used for the casting, curing, and disassembly of rocket motors.
The new CC3 and CC4 will cast pits where motors are cast and cured with rocket motor propellant. Mix
bowls will be brought in through the existing tramway, and propellant will be cast into the motor. The
following new equipment is required for the CC3 and CC4 operations: three (3) natural gas-fired
low-NOx boilers with flue-gas recirculation, each rated less than 2.0 MMBtu/hr, two (2) natural gas-fired
low-NOx boilers each rated less than 1.0 MMBtu/hr, three (3) natural gas-fired heaters/air handlers each
less than one (1) MMBtu/hr, a 4,309 hp diesel-fired emergency generator, and material handling
operations containing VOC and/or HAP's.

The new MBC4 building will be used to clean mixing bowls following casting and to remove cured
propellant from cast tooling. The mix bowls are cleaned using a mix bowl cleaning robot, and smaller
tools are hand-wiped in a fume hood. The following new equipment is required for MBC4 operations:
two (2) natural gas-fired low-NOx boilers with flue-gas recirculation each rated less than 2.0 MMBtu/hr,
two (2) natural gas-fired heaters each less than one (1) MMBtu/hr, one (1) 755 hp diesel-fired emergency
generator, one (1) fume hood, and material cleaning operations containing VOC.

The finishing operations are where loaded motors are brought to attach nozzles, and final finishes are
hand-applied, including paint and sealant. The following new equipment is required for the FIN8
operations: two (2) natural gas-fired low-NOx boilers with flue-gas recirculation, each rated less than 2.0
MMBtu/hr; two (2) fume hoods; and material handling operations containing VOC and/or HAP's.

Shipping operations are where finished motors are stored prior to shipping. Natural gas-fired boilers are
the only emission-emitting equipment in this building. The following new equipment is required for the
SHIP6 operations: two (2) natural gas-fired low-NOx boilers with flue-gas recirculation, each rated less
than 2.0 MMBtu/hr.

The Pre-Batch Storage Building 2603 is simply a location to hold materials prior to use. The following
new equipment is required for the Pre-Batch Storage Building 2603: two (2) natural gas-fired low-NOx
boilers, each rated less than 2.0 MMBtu/hr.

DAQE-AN104020060-24
Page 5

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)
CO2 Equivalent -10330 32764.00
Carbon Monoxide -6.02 27.78
Nitrogen Oxides -3.35 49.64
Particulate Matter - PM10 -0.35 51.32
Particulate Matter - PM2.5 -0.35 51.25
Sulfur Oxides -0.08 0.60
Volatile Organic Compounds 3.24 46.77

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
1-Bromopropane (CAS #106945) 0 1500
2,4-Toluene Diisocyanate (CAS #584849) 0 1960
4,4-Methylenedianiline (CAS #101779) 0 500
Chlorine (CAS #7782505) 0 400
Chromium Compounds (CAS #CMJ500) 0 200
Ethyl Benzene (CAS #100414) 0 3000
Ethylene Dichloride (1,2-Dichloroethane) (CAS #107062) 0 500
Formaldehyde (CAS #50000) 0 200
Generic HAPs (CAS #GHAPS) 0 3980
Glycol Ethers (CAS #EDF109) 0 500
Hexamethylene-1,6-Diisocyanate (CAS #822060) 0 1900
Hexane (CAS #110543) 0 4600
Hydrochloric Acid (Hydrogen Chloride) (CAS #7647010) -12800 7000
Maleic Anhydride (CAS #108316) 0 500
Methanol (CAS #67561) 0 2000
Methyl Chloroform (1,1,1-Trichloroethane) (CAS #71556) 0 2000
Methyl Isobutyl Ketone (Hexone) (CAS #108101) 0 2000
Methylene Chloride (Dichloromethane) (CAS #75092) 0 1000
Methylene Diphenyl Diisocyanate (MDI) (CAS #101688) 0 1160
Toluene (CAS #108883) 0 6000
Xylenes (Isomers And Mixture) (CAS #1330207) 0 8000
Change (TPY) Total (TPY)
Total HAPs -0.45 24.45

DAQE-AN104020060-24
Page 6

SECTION I: GENERAL PROVISIONS

I.1 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.2 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.3 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.4 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.5 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

I.6 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories.
[R307-150]

I.7 The owner/operator shall submit documentation of the status of construction or modification to
the Director within 18 months from the date of this AO. This AO may become invalid if
construction is not commenced within 18 months from the date of this AO or if construction is
discontinued for 18 months or more. To ensure proper credit when notifying the Director, send
the documentation to the Director, attn.: NSR Section. [R307-401-18]

I.8 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]

SECTION II: PERMITTED EQUIPMENT

II.A THE APPROVED EQUIPMENT

II.A.1 Bacchus Works: Plant 1/NIROP/Bacchus West
Rocket propulsion plant in West Valley City

II.A.2 Building 8501
Powerhouse Boilers

A. Nebraska natural gas-fired boiler - rated at 50,000 lb/hr (66 MMBtu/hr).

B. Murray natural gas-fired boiler - rated at 50,000 lb/hr (66 MMBtu/hr).

DAQE-AN104020060-24
Page 7

II.A.3 Building 4B
Ammonium Perchlorate Processing

Control: Pulse jet baghouse and HEPA filtration system
Baghouse maximum flow rate: 400 acfm
Baghouse pressure drop range during processing: Between 1 and 5.2 inches of H2O

II.A.4 Building 17A (NEW)
Fiberglass Cutting

Vacuum dust collector

II.A.5 Building 2387
HMX Dryer Building

HMX Dryer
Control: Condenser
Dryer Stack V-1 (emits IPA and water vapor)

IPA vapor ventilation hood
Vents inside, listed for informational purposes only

II.A.6 Building 2440
3-D Carbon/Carbon

Process control: Fume incinerator, 1 MMBtu/hr rate
Process control: Central vacuum system

II.A.7 Building 2471
Case Preparation

A. Surface preparation activities
Control: Pulse jet baghouse
Baghouse maximum flow rate: 1,500 acfm
Baghouse pressure drop range: Between 1 and 7 inches of H2O.

B. Two (2) paint spray booths
Control: High efficiency 3-stage fabric filters.

C. Three (3) spray lance robot booths: SLR-1, SLR-2, SLR-3
Control: Fabric filters.

DAQE-AN104020060-24
Page 8

II.A.8 Diesel-Fired Emergency Generators >600 Hp (NEW)
Building Location Maximum Hp rating
35A 755*
55, Stores 755*
2428, Al/AP Prep 804
2444, Mix #1 1340
2449, Cast Cure #1 (south) 1005
2484, Mix #3 1474
2489(A), Cast Cure #2 (west) 1005
2489(B), Cast Cure #2 (east) 1005
2500, Mix #2A 1340
2609, MBC#4 755* (NEW)
2617, 2618, Cast Cure #3 & #4 4309* (NEW)
8608, Plt.#1 Powerhouse 755*

*NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ (applies to all)

II.A.9 Diesel-Fired Emergency Generators 100-600 Hp
Building Location Maximum Hp rating
27-A, Laboratory 335*
56, Compressor Building 402
2430, Al-Premix 469
2450, Control House 268
2466, Mix Bowl Clean #2 469
2498, Mix Bowl Clean #3 536
2507, Subscale ReCast 469
8501, Powerhouse 464*
8503, Compressor House 268
8569, Wastewater 335
8695, Pumphouse #3 268

*NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ (applies to all)

II.A.10 Diesel-Fired Emergency Generators <100 Hp
Building Location Maximum Hp rating
55, Material 72
8100D, (Admin)PBX 81

MACT Applicability: Subpart ZZZZ (applies to all)

II.A.11 Natural Gas-Fired Emergency Generator
Building Location Maximum Hp rating
2440, 3D Carbon 163

NSPS Applicability: Subpart JJJJ
MACT Applicability: Subpart ZZZZ

II.A.12 Propane-Fired Emergency Generator
Building Location Maximum Hp rating
8275, Microwave Station 16

MACT Applicability: Subpart ZZZZ

II.A.13 Area 32A
Burning Grounds

DAQE-AN104020060-24
Page 9

II.A.14 Miscellaneous Natural Gas-Fired Equipment
Natural gas-fired boilers, air handlers, heaters, and water heaters less than 5 MMBTU/hr

II.A.15 Miscellaneous Buildings
Includes miscellaneous operations, spray booths, baghouses, ovens, dust collectors, gasoline and
diesel tanks, and other processes.

Gasoline storage tank MACT applicability: Subpart CCCCCC

SECTION II: SPECIAL PROVISIONS

II.B REQUIREMENTS AND LIMITATIONS

II.B.1 Sitewide Requirements
II.B.1.a The owner/operator shall not allow visible emissions from the following emission points to
exceed the following values:

A. Diesel-fired emergency generators - 20% opacity.

B. All other point or fugitive emissions sources, excluding the burning grounds
- 10% opacity.

[R307-401-8]

II.B.1.a.1 Opacity observations of emissions from stationary sources, except haul roads, shall be conducted
according to 40 CFR 60, Appendix A, Method 9. [R307-401-8]

II.B.1.a.2 Visible emission determinations for fugitive dust from haul roads shall use procedures similar to
Method 9. The normal requirement for observations to be made at 15-second intervals over a
six-minute period, however, shall not apply. Visible emissions shall be measured at the densest
point of the plume, but at a point not less than one-half vehicle length behind the vehicle and not
less than one-half the height of the vehicle. [R307-401-8]

II.B.1.b The owner/operator shall equip each paint spray booth with paint arrestor particulate filters, or
equivalent, to control particulate emissions. All air exiting the booths shall pass through this
control system before being vented to the atmosphere. [R307-401-8]

II.B.1.c Except when in use, the owner/operator shall store all VOC- and/or HAP-containing materials
and VOC- and/or HAP-laden rags in covered containers. [R307-401-8]

DAQE-AN104020060-24
Page 10

II.B.1.d The owner/operator shall not emit more than the following for plant-wide emissions of HAPs:

A. 0.98 tons per rolling 12-month period for 2,4 Toluene Diisocyanate.

B. 0.58 tons per rolling 12-month period for Methylene Diphenyl Diisocyanate.

C. 1.00 tons per rolling 12-month period for Methyl Chloroform.

D. 1.00 tons per rolling 12-month period for Methanol.

E. 0.10 tons per rolling 12-month period for Chromium Compounds.

F. 1.00 tons per rolling 12-month period for Methyl Isobutyl Ketone.

G. 0.95 tons per rolling 12-month period for Hexamethylene-1,6-Diisocyanate.

H. 1.50 tons per rolling 12-month period for Ethyl Benzene.

I. 2.30 tons per rolling 12-month period for Hexane.

J. 3.00 tons per rolling 12-month period for Toluene.

K. 3.50 tons per rolling 12-month period for Hydrochloric Acid.

L. 4.00 tons per rolling 12-month period for Xylene.

[R307-401-8]

II.B.1.d.1 To determine compliance with a 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. HAP
emissions shall be determined by maintaining a record of HAP-emitting materials used, burned,
or destroyed each month. [R307-401-8]

II.B.2 Building 4B - Ammonium Perchlorate Processing Building
II.B.2.a The owner/operator shall control emissions from the ammonium perchlorate process with a
baghouse and HEPA filtration system in series. Emissions from the ammonium perchlorate
process shall be routed to the operating baghouse and HEPA filtration system before being
discharged to the atmosphere. [R307-401-8]

II.B.2.a.1 The owner/operator shall install and maintain a high-pressure differential interlock in the HEPA
filtration system to shut down the ammonium perchlorate process when the pressure differential
goes above the maximum operating set point of 5.2 inches of water column for more than 60
seconds. The ammonium perchlorate process shall not operate without the operating HEPA
filtration system interlock. [R307-401-8]

II.B.2.a.2 The owner/operator shall record the pressure drop readings from the differential pressure
transmitters on a daily basis. [R307-401-8]

II.B.3 Building 2387 (CD3A) - HMX Dryer Building Requirements
II.B.3.a The owner/operator shall control emissions from the HMX dryer with the condenser. Emissions
from the HMX dryer shall be routed to the operating condenser before being discharged to the
atmosphere. [R307-401-8]

II.B.3.b The owner/operator shall not exceed 450 drying cycles of HMX per rolling 12-month period.
[R307-401-8]

DAQE-AN104020060-24
Page 11

II.B.3.b.1 To determine compliance with a 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. Drying
cycles of HMX shall be determined by an operations log. [R307-401-8]

II.B.4 Building 2440 - 3D Carbon Building Requirements
II.B.4.a The fume incinerator shall control carbon vapor deposition (CVD) emissions from the 3D carbon
process. All CVD emissions shall be routed to the operating fume incinerator before being
discharged into the atmosphere. [R307-401-8]

II.B.4.b At all times, while incinerating CVD emissions, the owner/operator shall maintain a temperature
at or above 1,500 degrees Fahrenheit in the fume incinerator. [R307-401-8]

II.B.4.b.1 The owner/operator shall install, calibrate, maintain, and operate a device to monitor the
operating temperature of the fume incinerator. The monitoring device shall be located such that
an inspector/operator can safely read the output at any time. The operating temperature of the
fume incinerator shall be recorded on a daily basis when the incinerator operates. [R307-401-8]

II.B.4.c The owner/operator shall operate the fume incinerator at a minimum residence time of 0.5
seconds. [R307-401-8]

II.B.4.c.1 The owner/operator shall maintain the manufacturer's specifications or analysis documenting an
incinerator design residence time of no less than 0.5 seconds at maximum flow rate. This
documentation shall be kept on site and readily available for inspection upon request.
[R307-401-8]

II.B.4.d The owner/operator shall equip each weaving machine's ventilation exhaust with particulate
filters to control particulate emissions. All exhaust exiting the weaving machines shall pass
through this control system before being vented to the atmosphere. [R307-401-8]

II.B.4.e The owner/operator shall equip the central vacuum system with particulate filters to control
particulate emissions. All air exiting the central vacuum system shall pass through this control
system before being vented to the atmosphere. [R307-401-8]

II.B.5 Building 2471 - Case Preparation Building Requirements
II.B.5.a The owner/operator shall not exceed 14.0 tons of VOC emissions per rolling 12-month period for
all operations in Building 2471. [R307-401-8]

DAQE-AN104020060-24
Page 12

II.B.5.a.1 To determine compliance with a 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. VOC
emissions shall be determined by maintaining a record of VOC-emitting materials used each
month. The record shall include the following data for each material used:

A. Name of the VOC-emitting material, such as: paint, adhesive, solvent, thinner,
reducers, chemical compounds, toxics, isocyanates, etc.

B. Density of each VOC-emitting material used (lbs per gallon).

C. Maximum percent by weight of all VOC in each material used.

D. Mass of each VOC-emitting material used.

E. The emission release factor (ERF) associated with each type of VOC-emitting
material.

F. The amount of VOC emitted monthly from each material used. The amount of
VOC emitted monthly by each material used shall be calculated by the following
procedure:

VOC = (%VOC by Weight)/100 x [Density (lb/gal)] x (Gal Consumed) x (1
ton/2,000 lb) x ERF (example if unit of measure is gallons).

G. The total amount of VOC emitted monthly from all materials used.

H. The amount of VOCs reclaimed for the month shall be similarly quantified and
subtracted from the quantities calculated above to provide the monthly total
VOC emissions.

[R307-401-8]

II.B.5.b The owner/operator shall vent all air exiting the Building 2471 spray lance robot booth SLR-1
with a stack release height of no less than 39' 3'' as measured from the base of the stack.
[R307-401-8]

II.B.6 Fuel Requirements
II.B.6.a The owner/operator shall not exceed a total natural gas consumption limit of 633,000 MMBtu
per rolling 12-month period for all-natural gas-fired equipment on site. [R307-401-8]

II.B.6.a.1 To determine compliance with a 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. Natural
gas consumption shall be determined by gas billing records. [R307-401-8]

II.B.6.b The owner/operator shall use only natural gas as the primary fuel in all fuel-burning furnaces,
ovens, boilers, and fume incinerators, and only use fuel oil as a backup fuel in all fuel-burning
boilers. [R307-401-8]

II.B.6.c The owner/operator shall limit fuel oil usage in all fuel-burning boilers to 48 hours per rolling
12-month period for periodic testing, maintenance, or operator training. There is no time limit on
the use of fuel oil in the fuel-burning boilers during periods of natural gas curtailment, gas supply
interruption, or startups. [R307-401-8]

DAQE-AN104020060-24
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II.B.6.c.1 To determine compliance with a 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. Records
documenting fuel oil usage in each fuel-burning boiler shall be kept in a log and shall include the
following:

A. The date fuel oil was used

B. The duration of operation in hours

C. The reason for fuel oil usage.

[R307-401-8]

II.B.6.d The sulfur content of any fuel oil burned in all fuel-burning boilers on site shall not exceed
0.50% by weight. [R307-401-8]

II.B.6.d.1 The sulfur content shall be determined by the American Standard for Testing and Materials
(ASTM) Method D2880-71, D-4294-89, or approved equivalent. Certification of fuel oil shall
be either by the owner/operator's own testing or by test reports from the fuel oil marketer.
[R307-401-8]

II.B.7 Emergency Engine Requirements
II.B.7.a The owner/operator shall not operate each emergency engine on site for more than 100 hours per
year during non-emergency situations. There is no time limit on the use of the engines during
emergencies. [R307-401-8]

II.B.7.a.1 To determine compliance with a yearly total, the owner/operator shall update records
documenting generator usage by January 30th for the preceding year. Records documenting the
operation of each emergency engine shall be kept in a log and shall include the following:

A. The date the emergency engine was used

B. The duration of operation in hours

C. The reason for the emergency engine usage.

[R307-401-8]

II.B.7.a.2 To determine the duration of operation, the owner/operator shall install a non-resettable hour
meter for each emergency engine. [R307-401-8]

II.B.7.b The owner/operator shall only use diesel fuel (e.g., fuel oil #1, #2, or diesel fuel oil additives) as
fuel in each stationary diesel emergency engine. [R307-401-8]

II.B.7.b.1 The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur
diesel (ULSD), which has a sulfur content of 15 ppm or less. [R307-401-8]

II.B.7.b.2 To demonstrate compliance with the ULSD fuel requirement, the owner/operator shall maintain
records of diesel fuel purchase invoices or obtain certification of sulfur content from the diesel
fuel supplier. The diesel fuel purchase invoices shall indicate that the diesel fuel meets the
ULSD requirements. [R307-401-8]

II.B.8 Area 32A - Burning Ground Requirements
II.B.8.a The owner/operator shall use the open burning site to destroy only scrap explosives and
hazardous material. The size of the open burning site shall not exceed five (5) acres.
[R307-401-8]

DAQE-AN104020060-24
Page 14

II.B.8.b The owner/operator shall not exceed a daily limit of 4,500 lbs of waste propellant and
contaminated waste burned or destroyed per day. [R307-401-8]

II.B.8.b.1 To determine compliance with the daily limit, the owner/operator shall maintain a record of the
quantity of waste burned or destroyed on a daily basis. [R307-401-8]

II.B.8.c When a Salt Lake County "No Burn" order is in effect for wood-burning stoves, open burning of
waste propellant and contaminated wastes shall not be performed, except for unstable wastes.
[R307-401-8]

II.B.8.c.1 The owner/operator shall maintain, with the record of waste burned or destroyed on a daily basis,
a record of whether or not a Salt Lake County "No Burn" order was in effect for that day.
[R307-401-8]

II.B.8.d When a Salt Lake County "No Burn" order is in effect, the owner/operator is allowed to perform
open burning of the most unstable wastes, including nitroglycerin wastes, laboratory-generated
wastes, and unburned reactive wastes from a previous burn attempt. The open burning of
unstable wastes during a Salt Lake County "No Burn" order shall not exceed 400 lbs per day.
[R307-401-8]

II.B.8.d.1 The owner/operator shall maintain a record of the quantity of unstable waste burned or destroyed
during a Salt Lake County "No Burn" order. The record shall include the type of waste burned
or destroyed. [R307-401-8]

II.B.8.e The owner/operator is allowed to destroy the backlog of wastes not burned during the Salt Lake
County "No Burn" order up to a total of 6,000 lbs per day on the days following the burning
restrictions. [R307-401-8]

II.B.8.e.1 The owner/operator shall maintain a record of the quantity of backlogged waste burned or
destroyed on the days following a Salt Lake County "No Burn" order. The record shall include
the date and reason for open burning. [R307-401-8]

II.B.8.f The owner/operator shall not burn wastes exceeding 5% chlorine content unless the following
conditions are all met:

A. Surface wind direction at Building 32A is less than or equal to 112 degrees or
more than or equal to 270 degrees.

B. Elevated wind direction has been verified by a helium balloon.

C. Wind speed does not exceed 15 miles/hr.

[R307-401-8]

II.B.8.f.1 The owner/operator shall verify and record the wind speed and direction measurements prior to
the burn. The owner/operator shall not verify and record the measurements more than ten (10)
minutes before the burn. [R307-401-8]

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents:

Supersedes AO DAQE-AN104020059-22 dated October 28, 2022
Is Derived From NOI dated September 12, 2023
Incorporated Additional Information dated February 23, 2024
DAQE-AN104020060-24
Page 15

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-MN104020060A-24

M E M O R A N D U M

To: Site: Northrop Grumman Systems Corporation - Bacchus Works

Through: Jon L. Black, Major New Source Review Section Manager,
UDAQ

From: Tad Anderson, Engineer, Major New Source Review Section. UDAQ

Date: May 9, 2024

Subject: Response to Comments on Intent to Approve DAQE-IN104020060-24

An ITA for Northrop Grumman Systems Corporation - Bacchus Works was proposed with a public
comment period from April 7, 2024, through May 7, 2024. On April 23, 2024, Deb Sawyer (founder and
leader of the Utah Campaign to Abolish Nuclear Weapons) submitted a request for a hearing. The request
for a hearing must be requested within the first 15 days of the public comment period (UAC R307-401-
7(2)(b)(iii)). The request for a hearing was past the first 15 days, so no hearing was held. The submitted
request for a hearing contained some comments about the proposed Approval Order [DAQE-
IN101210291-24]. Even though the request for a hearing did not officially submit the comments, Utah
Division of Air Quality (UDAQ) decided to respond to the comments as official comments.

The following are the comments that were received from Deb Sawer (Utah Campaign to Abolish Nuclear
Weapons) and UDAQ’s response to the comment. A copy of the hearing request with the comments and
Modeling Analysis DAQE-MN104020060-24 is attached to this memorandum as Attachment A.

Comments and Responses

COMMENT #1:

“1. A nuclear war would be disastrous for air quality. Elaboration is not needed.”

UDAQ Response
UDAQ has had Notices of Intent for permit modifications submitted for Northrop Grumman Systems
Corporation sites (Bacchus and Promontory) addressing a new generation large solid rocket motor for
NASA's Booster Obsolescence and Life Extension (BOLE) program. The BOLE motor will be made of a
carbon fiber case and utilize a new propellant formulation. The new case will allow additional propellant
to be cast into the motor to deliver higher payloads to space.

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

JB
DAQE-MN104020060A-24
Page 2
UDAQ does not have the right to deny the Approval Order based upon use of product. If the submitted
notices of Intent for permit modification meet Utah Administrative Code (UAC) R307-401 “Permits:
New and Modified Sources” and UAC R307-403 “Permits New and Modified Sources in Nonattainment
Areas and Maintenance Areas”, UDAQ is required to issue an Approval Order.

COMMENT #2:
“2. To adequately address the environmental problems that are already creating health problems in
Utah (for example, asthma, Parkinsons Disease, cancer) the focus of our spending needs to shift from
wasteful military projects to cleaning our environment.”

UDAQ Response
UDAQ has reviewed all Criteria Pollutants and Hazardous Air Pollutants per UAC R307-410-4
“Modeling of Criteria Pollutant Impacts in Attainment Areas” and UAC R307-410-5 “Documentation of
Ambient Air Impacts for Hazardous Air Pollutants”. A Modeling Analysis was conducted for Chromium
Compounds, 2,4-Toluene Diisocyanate, Methylene Diphenyl Diisocyanate and Hexamethylene-1,6-
Diisocyanate. The results of the analysis demonstrated that all hazardous air pollutants are below the
toxic screening level. The Modeling analysis was conducted and documented in DAQE-MN104020060-
24.

COMMENT #3:
“3. Two employees recently died at the Bacchus plant. Almost assuredly, their deaths could have
been prevented if Northrop Grumman had provided better protection. The State of Utah holds a
responsibility to protect our citizens by assuring safe working conditions.”

UDAQ Response
Safe working conditions are regulated though Utah Occupational Safety and Health Division. UDAQ
does not address safe working conditions within Approval Orders. No further action is required.
DAQE-MN104020060A-24
Page 3

ATTACHMENT A
DAQE-MN104020060A-24
Page 4

Request for Hearing

DAQE-MN104020060A-24
Page 5

Dear Tad Anderson,

As founder and leader of the Utah Campaign to Abolish Nuclear Weapons, I feel a responsibility to the people of not only
Utah, but our world, as the possibility of nuclear war remains a major threat to human civilization.

The United States created the first nuclear bombs. We now need to lead the world towards a future without the threat of
nuclear war. And we can do this—we can follow the advice of four men who at different times in their careers were engaged in the
nuclear arms race with the Soviet Union. There four men are William Perry, Henry Kissinger, Sam Nunn, and Geoge Shultz. Their
first joint commentary was published in the Wall Street Journal in January 2007.

One of the steps the United States needs to take is to halt the current plans to modernize the United States nuclear
weapons. Thus, the State of Utah needs to deny the request for the Northrop Grumman expansion of their Bacchus Plant.

The reasons to deny this request relate to air quality and include the following:
1. A nuclear war would be disastrous for air quality. Elaboration is not needed.
2. To adequately address the environmental problems that are already creating health problems in Utah (for example,
asthma, Parkinsons Disease, cancer) the focus of our spending needs to shift from wasteful military projects to cleaning
our environment.
3. Two employees recently died at the Bacchus plant. Almost assuredly, their deaths could have been prevented if Northrop
Grumman had provided better protection. The State of Utah holds a responsibility to protect our citizens by assuring safe
working conditions.
.
The Utah Campaign to Abolish Nuclear Weapons asks for a Public Hearing so the citizens of Utah can engage in this
important discussion of an expansion of Northrop Grumman.

Sincerely,

Deb Sawyer, President
DAQE-MN104020060A-24
Page 6

Modeling Analysis
DAQE-MN104020060-24

DAQE-MN104020060B-24

M E M O R A N D U M

To: Site: Northrop Grumman Systems Corporation - Bacchus Works

Through: Jon L. Black, Major New Source Review Section Manager, UDAQ

From: Tad Anderson, Engineer, Major New Source Review Section, UDAQ

Date: May 9, 2024

Subject: Response to Comments on Intent to Approve DAQE-IN104020060-24

An Intent to Approve (ITA) for Northrop Grumman Systems Corporation - Bacchus Works was proposed
with a public comment period from April 7, 2024, through May 7, 2024. On April 23, 2024, Deb Sawyer
(founder and leader of the Utah Campaign to Abolish Nuclear Weapons) submitted a request for a
hearing. The request for a hearing must be requested within the first 15 days of the public comment
period (Utah Administrative Code (UAC) R307-401-7(2)(b)(iii)). The request for a hearing was past the
first 15 days, so no hearing was held. The submitted request for a hearing contained some comments
about the proposed AO [DAQE-IN101210291-24]. Even though the request for a hearing did not
officially submit the comments, the Utah Division of Air Quality (UDAQ) decided to respond to them as
official comments because UDAQ received them during the public comment period.

The following are the comments that were received from Deb Sawer (Utah Campaign to Abolish Nuclear
Weapons) and UDAQ’s response to each comment. A copy of the hearing request with the comments
and Modeling Analysis DAQE-MN104020060-24 is attached to this memorandum as Attachment A.

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

JB
DAQE-MN104020060B-24
Page 2
Comments and Responses

COMMENT #1:

“1. A nuclear war would be disastrous for air quality. Elaboration is not needed.”

UDAQ Response
UDAQ has had Notices of Intent for permit modifications submitted for Northrop Grumman Systems
Corporation sites (Bacchus and Promontory) addressing a new generation large solid rocket motor for
NASA's Booster Obsolescence and Life Extension (BOLE) program. The BOLE motor will be made of a
carbon fiber case and utilize a new propellant formulation. The new case will allow additional propellant
to be cast into the motor to deliver higher payloads to space.

UDAQ does not have the authority to deny the Approval Order based on the use of the product. If the
submitted Notices of Intent for Permit Modification meet UAC R307-401 “Permits: New and Modified
Sources” and UAC R307-403 “Permits New and Modified Sources in Nonattainment Areas and
Maintenance Areas,” UDAQ is required to issue an Approval Order. The Notice of Intent here met all the
applicable requirements.

COMMENT #2:
“2. To adequately address the environmental problems that are already creating health problems in
Utah (for example, asthma, Parkinsons Disease, cancer) the focus of our spending needs to shift from
wasteful military projects to cleaning our environment.”

UDAQ Response
UDAQ has reviewed all Criteria Pollutants and Hazardous Air Pollutants per UAC R307-410-4
“Modeling of Criteria Pollutant Impacts in Attainment Areas,” and UAC R307-410-5, “Documentation of
Ambient Air Impacts for Hazardous Air Pollutants.” A Modeling Analysis was conducted for Chromium
Compounds, 2,4-Toluene Diisocyanate, Methylene Diphenyl Diisocyanate and Hexamethylene-1,6-
Diisocyanate. The results of the analysis demonstrated that all hazardous air pollutants are below the
toxic screening level. The modeling analysis was conducted and documented in
DAQE-MN104020060-24.

COMMENT #3:
“3. Two employees recently died at the Bacchus plant. Almost assuredly, their deaths could have
been prevented if Northrop Grumman had provided better protection. The State of Utah holds a
responsibility to protect our citizens by assuring safe working conditions.”

UDAQ Response
Safe working conditions are regulated through the Utah Occupational Safety and Health Division.
UDAQ does not address safe working conditions through its Approval Orders because it does not have
statutory authority to do so. No further action is required.
DAQE-MN104020060B-24
Page 3

ATTACHMENT A
DAQE-MN104020060B-24
Page 4

Request for Hearing

DAQE-MN104020060B-24
Page 5

Dear Tad Anderson,

As founder and leader of the Utah Campaign to Abolish Nuclear Weapons, I feel a responsibility to the people of not only
Utah, but our world, as the possibility of nuclear war remains a major threat to human civilization.

The United States created the first nuclear bombs. We now need to lead the world towards a future without the threat of
nuclear war. And we can do this—we can follow the advice of four men who at different times in their careers were engaged in the
nuclear arms race with the Soviet Union. There four men are William Perry, Henry Kissinger, Sam Nunn, and Geoge Shultz. Their
first joint commentary was published in the Wall Street Journal in January 2007.

One of the steps the United States needs to take is to halt the current plans to modernize the United States nuclear
weapons. Thus, the State of Utah needs to deny the request for the Northrop Grumman expansion of their Bacchus Plant.

The reasons to deny this request relate to air quality and include the following:
1. A nuclear war would be disastrous for air quality. Elaboration is not needed.
2. To adequately address the environmental problems that are already creating health problems in Utah (for example,
asthma, Parkinsons Disease, cancer) the focus of our spending needs to shift from wasteful military projects to cleaning
our environment.
3. Two employees recently died at the Bacchus plant. Almost assuredly, their deaths could have been prevented if Northrop
Grumman had provided better protection. The State of Utah holds a responsibility to protect our citizens by assuring safe
working conditions.
.
The Utah Campaign to Abolish Nuclear Weapons asks for a Public Hearing so the citizens of Utah can engage in this
important discussion of an expansion of Northrop Grumman.

Sincerely,

Deb Sawyer, President
DAQE-MN104020060B-24
Page 6

Modeling Analysis
DAQE-MN104020060-24

DAQE-IN104020060-24

April 4, 2024

Kris Blauer
Northrop Grumman Systems Corporation
M/S F/1/EV
P.O. Box 98
Magna, UT 84044-0098
[e-mail]

Dear Mr. Blauer:

Re: Intent to Approve: Modification to Approval Order to DAQE-AN104020059-22, Project Prime
at the Bacchus Works Facility
Project Number: N104020060

The attached document is the Intent to Approve (ITA) for the above-referenced project. The ITA is
subject to public review. Any comments received shall be considered before an Approval Order (AO) is
issued. The Division of Air Quality is authorized to charge a fee for reimbursement of the actual costs
incurred in the issuance of an AO. An invoice will follow upon issuance of the final AO.

Future correspondence on this ITA should include the engineer's name, Tad Anderson, as well as the
DAQE number as shown on the upper right-hand corner of this letter. Tad Anderson, can be reached at
[phone] or [e-mail], if you have any questions.

Sincerely,

{{$s }}

Jon L. Black, Manager
New Source Review Section

JLB:TA:jg

cc: Salt Lake County Health Department

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

* ) ' & — + - B v A ? A C ? G w D E ˜
STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

INTENT TO APPROVE
DAQE-IN104020060-24
Modification to Approval Order to DAQE -AN104020059-22, Project
Prime at the Bacchus Works Facility

Prepared By
Tad Anderson, Engineer
[phone]
[e-mail]

Issued to
Northrop Grumman Systems Corporation - Bacchus Works - Plant 1 NIROP
Bacchus West

Issued On
April 4, 2024

{{$s }}

New Source Review Section Manager
Jon L. Black
{{#s=Sig_es_:signer1:signature}}

* ) ' & — + - B v A ? A C ? G w D E ˜

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.................................................................................................................. 4
SUMMARY OF EMISSIONS .................................................................................................... 5
PUBLIC NOTICE STATEMENT............................................................................................... 5
SECTION I: GENERAL PROVISIONS .................................................................................... 6
SECTION II: PERMITTED EQUIPMENT .............................................................................. 7
SECTION II: SPECIAL PROVISIONS ..................................................................................... 9
PERMIT HISTORY ................................................................................................................... 15
ACRONYMS ............................................................................................................................... 16

DAQE-IN104020060-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Northrop Grumman Systems Corporation Northrop Grumman Systems Corporation -
Bacchus Works - Plant 1 NIROP Bacchus West

Mailing Address Physical Address
M/S F/1/EV
P.O. Box 98
Magna, UT 84044-0098
5000 South 8400 West
West Valley City, UT 84044

Source Contact UTM Coordinates
Name: Allia Abdallah 409,700 m Easting
Phone: [phone],502,100 m Northing
Email: [e-mail] Datum NAD27
UTM Zone 12

SIC code 3761 (Guided Missiles & Space Vehicles)

SOURCE INFORMATION
General Description
Northrop Grumman Systems Corporation (NGSC) operates the Bacchus site, an existing rocket
propulsion plant in West Valley City, Salt Lake County. The NGSC Bacchus site manufactures solid-fuel
rocket motors for NASA and the Department of Defense. The manufacturing operations at this plant
include rocket case preparation buildings, cyclotetramethylene-tetranitramine (HMX) grinding and drying
processes for making solid rocket fuel, propellant sampling and machining, and an open burning ground
for the routine burning of explosive and flammable wastes.
NSR Classification
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA, Salt Lake County SO2
NAA
Salt Lake County
Airs Source Size: SM

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
DAQE-IN104020060-24
Page 4

MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
MACT (Part 63), CCCCCC: National Emission Standards for Hazardous Air Pollutants for
Source Category: Gasoline Dispensing Facilities

Project Description
NGSC has requested to install Project Prime, which includes new buildings and equipment to support
increased rocket motor manufacturing at the Bacchus work site located in West Valley City. The Project
Prime consists of adding to the existing Cast and Cure operations (adding Cast Cure 3 (CC3-building
2617) and Cast Cure 4 (CC4-building 2618) as part of the Cast Cure Complex), adding to the existing
Mix Bowl Cleaning operations (adding Mix Bowl Cleaning 4 (MBC4-buildings 2609 and 2610)), adding
to the existing Finishing operations (adding Finishing 8 (FIN8-building 2613)), adding to the existing
Shipping operations (adding Shipping 6 (SHIP6-building 2611)), adding a Pre-Batch Storage Building
(building 2603), increasing operations in the Pre-Mix Process (building 10A), and adding fiberglass
cutting operations to the existing building 17A.

The new CC3 and CC4 buildings will be used for the casting, curing, and disassembly of rocket motors.
The new CC3 and CC4 will cast pits where motors are cast and cured with rocket motor propellant. Mix
bowls will be brought in through the existing tramway, and propellant will be cast into the motor. The
following new equipment is required for the CC3 and CC4 operations: three (3) natural gas-fired low NOx
boilers with flue-gas recirculation each rated less than 2.0 MMBtu/hr, two (2) natural gas-fired low NOx
boilers each rated less than 1.0 MMBtu/hr, three (3) natural gas-fired heaters/air handlers each less than
one (1) MMBtu/hr, a 4,309 hp diesel-fired emergency generator, and material handling operations
containing VOC and/or HAP's.

The new MBC4 building will be used to clean mixing bowls following casting and to remove cured
propellant from cast tooling. The mix bowls are cleaned using a mix bowl cleaning robot, and smaller
tools are hand-wiped in a fume hood. The following new equipment is required for MBC4 operations:
two (2) natural gas-fired low NOx boilers with flue-gas recirculation each rated less than 2.0 MMBtu/hr,
two (2) natural gas-fired heaters each less than one (1) MMBtu/hr, one (1) 755 hp diesel-fired emergency
generator, one (1) fume hood, and material cleaning operations containing VOC.

The Finishing operations are where loaded motors are brought to attach nozzles, and final finishes are
hand-applied, including paint and sealant. The following new equipment is required for the FIN8
operations: two (2) natural gas-fired low NOx boilers with flue-gas recirculation, each rated less than 2.0
MMBtu/hr, two (2) fume hoods, and material handling operations containing VOC and/or HAP's.

Shipping operations are where finished motors are stored prior to shipping. Natural gas-fired boilers are
the only emission-emitting equipment in this building. The following new equipment is required for the
SHIP6 operations: two (2) natural gas-fired low NOx boilers with flue-gas recirculation, each rated less
than 2.0 MMBtu/hr.

The Pre-Batch Storage Building 2603 is simply a location to hold materials prior to use. The following
new equipment is required for the Pre-Batch Storage Building 2603: two (2) natural gas-fired low NOx
boilers, each rated less than 2.0 MMBtu/hr.

DAQE-IN104020060-24
Page 5

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)
CO2 Equivalent -10330 32764.00
Carbon Monoxide -6.02 27.78
Nitrogen Oxides -3.35 49.64
Particulate Matter - PM10 -0.35 51.32
Particulate Matter - PM2.5 -0.35 51.25
Sulfur Oxides -0.08 0.60
Volatile Organic Compounds 3.24 46.77

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
1-Bromopropane (CAS #106945) 0 1500
2,4-Toluene Diisocyanate (CAS #584849) 0 1960
4,4-Methylenedianiline (CAS #101779) 0 500
Chlorine (CAS #7782505) 0 400
Chromium Compounds (CAS #CMJ500) 0 200
Ethyl Benzene (CAS #100414) 0 3000
Ethylene Dichloride (1,2-Dichloroethane) (CAS #107062) 0 500
Formaldehyde (CAS #50000) 0 200
Generic HAPs (CAS #GHAPS) 0 3980
Glycol Ethers (CAS #EDF109) 0 500
Hexamethylene-1,6-Diisocyanate (CAS #822060) 0 1900
Hexane (CAS #110543) 0 4600
Hydrochloric Acid (Hydrogen Chloride) (CAS #7647010) -12,800 7000
Maleic Anhydride (CAS #108316) 0 500
Methanol (CAS #67561) 0 2000
Methyl Chloroform (1,1,1-Trichloroethane) (CAS #71556) 0 2000
Methyl Isobutyl Ketone (Hexone) (CAS #108101) 0 2000
Methylene Chloride (Dichloromethane) (CAS #75092) 0 1000
Methylene Diphenyl Diisocyanate (MDI) (CAS #101688) 0 1160
Toluene (CAS #108883) 0 6000
Xylenes (Isomers And Mixture) (CAS #1330207) 0 8000
Change (TPY) Total (TPY)
Total HAPs -0.45 24.45

PUBLIC NOTICE STATEMENT

The NOI for the above-referenced project has been evaluated and has been found to be consistent with the
requirements of UAC R307. Air pollution producing sources and/or their air control facilities may not be
constructed, installed, established, or modified prior to the issuance of an AO by the Director.

A 30-day public comment period will be held in accordance with UAC R307-401-7. A notification of the
intent to approve will be published in the Salt Lake Tribune and Deseret News on April 7, 2024. During
the public comment period the proposal and the evaluation of its impact on air quality will be available
for the public to review and provide comment. If anyone so requests a public hearing within 15 days of
DAQE-IN104020060-24
Page 6

publication, it will be held in accordance with UAC R307-401-7. The hearing will be held as close as
practicable to the location of the source. Any comments received during the public comment period and
the hearing will be evaluated. The proposed conditions of the AO may be changed as a result of the
comments received.

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.

I.1 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.2 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.3 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.4 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.5 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

I.6 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories.
[R307-150]

I.7 The owner/operator shall submit documentation of the status of construction or modification to
the Director within 18 months from the date of this AO. This AO may become invalid if
construction is not commenced within 18 months from the date of this AO or if construction is
discontinued for 18 months or more. To ensure proper credit when notifying the Director, send
the documentation to the Director, attn.: NSR Section. [R307-401-18]

I.8 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]

DAQE-IN104020060-24
Page 7

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.

II.A THE APPROVED EQUIPMENT

II.A.1 Bacchus Works: Plant 1/NIROP/Bacchus West
Rocket propulsion plant in West Valley City

II.A.2 Building 8501
Powerhouse Boilers

A. Nebraska natural gas-fired boiler - rated at 50,000 lb/hr (66 MMBtu/hr).

B. Murray natural gas-fired boiler - rated at 50,000 lb/hr (66 MMBtu/hr).

II.A.3 Building 4B
Ammonium Perchlorate Processing

Control: Pulse jet baghouse and HEPA filtration system
Baghouse maximum flow rate: 400 acfm
Baghouse pressure drop range during processing: Between 1 and 5.2 inches of H2O

II.A.4 Building 17A (NEW)
Fiberglass Cutting

Vacuum dust collector

II.A.5 Building 2387
HMX Dryer Building

HMX Dryer
Control: Condenser
Dryer Stack V-1 (emits IPA and water vapor)

IPA vapor ventilation hood
Vents inside, listed for informational purposes only

II.A.6 Building 2440
3-D Carbon/Carbon

Process control: Fume incinerator, one (1) MMBtu/hr rate
Process control: Central vacuum system

DAQE-IN104020060-24
Page 8

II.A.7 Building 2471
Case Preparation

A. Surface preparation activities
Control: Pulse jet baghouse
Baghouse maximum flow rate: 1,500 acfm
Baghouse pressure drop range: Between one (1) and seven(7) inches of H2O

B. Two (2) paint spray booths
Control: High efficiency 3-stage fabric filters

C. Three (3) spray lance robot booths: SLR-1, SLR-2, SLR-3
Control: Fabric filters

II.A.8 Diesel-Fired Emergency Generators >600 Hp (NEW)
Building Location Maximum Hp rating
35A 755*
55, Stores 755*
2428, Al/AP Prep 804
2444, Mix #1 1340
2449, Cast Cure #1 (south) 1005
2484, Mix #3 1474
2489(A), Cast Cure #2 (west) 1005
2489(B), Cast Cure #2 (east) 1005
2500, Mix #2A 1340
2609, MBC#4 755* (NEW)
2617, 2618, Cast Cure #3 & #4 4309* (NEW)
8608, Plt.#1 Powerhouse 755*

*NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ (applies to all)

II.A.9 Diesel-Fired Emergency Generators 100-600 Hp
Building Location Maximum Hp rating
27-A, Laboratory 335*
56, Compressor Building 402
2430, Al-Premix 469
2450, Control House 268
2466, Mix Bowl Clean #2 469
2498, Mix Bowl Clean #3 536
2507, Subscale ReCast 469
8501, Powerhouse 464*
8503, Compressor House 268
8569, Wastewater 335
8695, Pumphouse #3 268

*NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ (applies to all)

II.A.10 Diesel-Fired Emergency Generators <100 Hp
Building Location Maximum Hp rating
55, Material 72
8100D, (Admin)PBX 81

MACT Applicability: Subpart ZZZZ (applies to all)

DAQE-IN104020060-24
Page 9

II.A.11 Natural Gas-Fired Emergency Generator
Building Location Maximum Hp rating
2440, 3D Carbon 163

NSPS Applicability: Subpart JJJJ
MACT Applicability: Subpart ZZZZ

II.A.12 Propane-Fired Emergency Generator
Building Location Maximum Hp rating
8275, Microwave Station 16

MACT Applicability: Subpart ZZZZ

II.A.13 Area 32A
Burning Grounds

II.A.14 Miscellaneous Natural Gas-fired Equipment
Natural gas-fired boilers, air handlers, heaters, and water heaters less than 5 MMBTU/hr

II.A.15 Miscellaneous Buildings
Includes miscellaneous operations, spray booths, baghouses, ovens, dust collectors, gasoline and
diesel tanks, and other processes

Gasoline storage tank MACT applicability: Subpart CCCCCC

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.

II.B REQUIREMENTS AND LIMITATIONS

II.B.1 Sitewide Requirements
II.B.1.a The owner/operator shall not allow visible emissions from the following emission points to
exceed the following values:

A. Diesel-fired emergency generators - 20% opacity

B. All other point or fugitive emissions sources, excluding the burning
grounds - 10% opacity.

[R307-401-8]

II.B.1.a.1 Opacity observations of emissions from stationary sources, except haul roads, shall be conducted
according to 40 CFR 60, Appendix A, Method 9. [R307-401-8]

II.B.1.a.2 Visible emission determinations for fugitive dust from haul roads shall use procedures similar to
Method 9. The normal requirement for observations to be made at 15-second intervals over a
six-minute period, however, shall not apply. Visible emissions shall be measured at the densest
point of the plume but at a point not less than one-half vehicle length behind the vehicle and not
less than one-half the height of the vehicle. [R307-401-8]

DAQE-IN104020060-24
Page 10

II.B.1.b The owner/operator shall equip each paint spray booth with paint arrestor particulate filters, or
equivalent, to control particulate emissions. All air exiting the booths shall pass through this
control system before being vented to the atmosphere. [R307-401-8]

II.B.1.c Except when in use, the owner/operator shall store all VOC- and/or HAPs-containing materials
and VOC- and/or HAPs-laden rags in covered containers. [R307-401-8]

II.B.1.d The owner/operator shall not emit more than the following for plant-wide emissions of HAPs:

A. 0.98 tons per rolling 12-month period for 2,4 Toluene Diisocyanate.

B. 0.58 tons per rolling 12-month period for Methylene Diphenyl Diisocyanate.

C. 1.00 tons per rolling 12-month period for Methyl Chloroform.

D. 1.00 tons per rolling 12-month period for Methanol.

E. 0.10 tons per rolling 12-month period for Chromium Compounds.

F. 1.00 tons per rolling 12-month period for Methyl Isobutyl Ketone.

G. 0.95 tons per rolling 12-month period for Hexamethylene-1,6-Diisocyanate.

H. 1.50 tons per rolling 12-month period for Ethyl Benzene.

I. 2.30 tons per rolling 12-month period for Hexane.

J. 3.00 tons per rolling 12-month period for Toluene.

K. 3.50 tons per rolling 12-month period for Hydrochloric Acid.

L. 4.00 tons per rolling 12-month period for Xylene.

[R307-401-8]

II.B.1.d.1 To determine compliance with a 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. HAP
emissions shall be determined by maintaining a record of HAP-emitting materials used, burned,
or destroyed each month. [R307-401-8]

II.B.2 Building 4B - Ammonium Perchlorate Processing Building
II.B.2.a The owner/operator shall control emissions from the ammonium perchlorate process with a
baghouse and HEPA filtration system in series. Emissions from the ammonium perchlorate
process shall be routed to the operating baghouse and HEPA filtration system before being
discharged to the atmosphere. [R307-401-8]

II.B.2.a.1 The owner/operator shall install and maintain a high-pressure differential interlock in the HEPA
filtration system to shut down the ammonium perchlorate process when the pressure differential
goes above the maximum operating set point of 5.2 inches of water column for more than 60
seconds. The ammonium perchlorate process shall not operate without the operating HEPA
filtration system interlock. [R307-401-8]

II.B.2.a.2 The owner/operator shall record the pressure drop readings from the differential pressure
transmitters on a daily basis. [R307-401-8]

DAQE-IN104020060-24
Page 11

II.B.3 Building 2387 (CD3A) - HMX Dryer Building Requirements
II.B.3.a The owner/operator shall control emissions from the HMX dryer with the condenser. Emissions
from the HMX dryer shall be routed to the operating condenser before being discharged to the
atmosphere. [R307-401-8]

II.B.3.b The owner/operator shall not exceed 450 drying cycles of HMX per rolling 12-month period.
[R307-401-8]

II.B.3.b.1 To determine compliance with a 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. Drying
cycles of HMX shall be determined by an operations log. [R307-401-8]

II.B.4 Building 2440 - 3D Carbon Building Requirements
II.B.4.a The fume incinerator shall control carbon vapor deposition (CVD) emissions from the 3D carbon
process. All CVD emissions shall be routed to the operating fume incinerator before being
discharged to the atmosphere. [R307-401-8]

II.B.4.b At all times while incinerating CVD emissions, the owner/operator shall maintain a temperature
at or above 1,500 degrees Fahrenheit in the fume incinerator. [R307-401-8]

II.B.4.b.1 The owner/operator shall install, calibrate, maintain, and operate a device to monitor the
operating temperature of the fume incinerator. The monitoring device shall be located such that
an inspector/operator can safely read the output at any time. The operating temperature of the
fume incinerator shall be recorded on a daily basis when the incinerator operates. [R307-401-8]

II.B.4.c The owner/operator shall operate the fume incinerator at a minimum residence time of 0.5
seconds. [R307-401-8]

II.B.4.c.1 The owner/operator shall maintain the manufacturer's specifications or analysis documenting an
incinerator design residence time of no less than 0.5 seconds at maximum flow rate. This
documentation shall be kept on site and be readily available for inspection upon request.
[R307-401-8]

II.B.4.d The owner/operator shall equip each weaving machine's ventilation exhaust with particulate
filters to control particulate emissions. All exhaust exiting the weaving machines shall pass
through this control system before being vented to the atmosphere. [R307-401-8]

II.B.4.e The owner/operator shall equip the central vacuum system with particulate filters to control
particulate emissions. All air exiting the central vacuum system shall pass through this control
system before being vented to the atmosphere. [R307-401-8]

II.B.5 Building 2471 - Case Preparation Building Requirements
II.B.5.a The owner/operator shall not exceed 14.0 tons of VOC emissions per rolling 12-month period for
all operations in Building 2471. [R307-401-8]

DAQE-IN104020060-24
Page 12

II.B.5.a.1 To determine compliance with a 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. VOC
emissions shall be determined by maintaining a record of VOC-emitting materials used each
month. The record shall include the following data for each material used:

A. Name of the VOC- emitting material, such as: paint, adhesive, solvent, thinner,
reducers, chemical compounds, toxics, isocyanates, etc.

B. Density of each VOC-emitting material used (lbs per gallon)

C. Maximum percent by weight of all VOC in each material used

D. Mass of each VOC-emitting material used

E. The emission release factor (ERF) associated with each type of VOC-emitting
material

F. The amount of VOC emitted monthly from each material used. The amount of
VOC emitted monthly by each material used shall be calculated by the following
procedure:

VOC = (%VOC by Weight)/100 x [Density (lb/gal)] x (Gal Consumed) x (1
ton/2,000 lb) x ERF

(example if unit of measure is gallons)

G. The total amount of VOC emitted monthly from all materials used.

H. The amount of VOCs reclaimed for the month shall be similarly quantified and
subtracted from the quantities calculated above to provide the monthly total
VOC emissions.

[R307-401-8]

II.B.5.b The owner/operator shall vent all air exiting the Building 2471 spray lance robot booth SLR-1
with a stack release height of no less than 39' 3'' as measured from the base of the stack.
[R307-401-8]

II.B.6 Fuel Requirements
II.B.6.a The owner/operator shall not exceed a total natural gas consumption limit of 633,000 MMBtu
per rolling 12-month period for all-natural gas-fired equipment on site. [R307-401-8]

II.B.6.a.1 To determine compliance with a 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. Natural
gas consumption shall be determined by gas billing records. [R307-401-8]

II.B.6.b The owner/operator shall use only natural gas as the primary fuel in all fuel-burning furnaces,
ovens, boilers, and fume incinerators, and only use fuel oil as a backup fuel in all fuel-burning
boilers. [R307-401-8]

II.B.6.c The owner/operator shall limit fuel oil usage in all fuel-burning boilers to 48 hours each per
rolling 12-month period for periodic testing, maintenance, or operator training. There is no time
limit on the use of fuel oil in the fuel-burning boilers during periods of natural gas curtailment,
gas supply interruption, or startups. [R307-401-8]

DAQE-IN104020060-24
Page 13

II.B.6.c.1 To determine compliance with a 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. Records
documenting fuel oil usage in each fuel-burning boiler shall be kept in a log and shall include the
following:

A. The date fuel oil was used.

B. The duration of operation in hours.

C. The reason for fuel oil usage.

[R307-401-8]

II.B.6.d The sulfur content of any fuel oil burned in all fuel-burning boilers on site shall not exceed
0.50% by weight. [R307-401-8]

II.B.6.d.1 The sulfur content shall be determined by the American Standard for Testing and Materials
(ASTM) Method D2880-71, D-4294-89, or approved equivalent. Certification of fuel oil shall
be either by the owner/operator's own testing or by test reports from the fuel oil marketer.
[R307-401-8]

II.B.7 Emergency Engine Requirements
II.B.7.a The owner/operator shall not operate each emergency engine on site for more than 100 hours per
year during non-emergency situations. There is no time limit on the use of the engines during
emergencies. [R307-401-8]

II.B.7.a.1 To determine compliance with a yearly total, the owner/operator shall update records
documenting generator usage by January 30th for the preceding year. Records documenting the
operation of each emergency engine shall be kept in a log and shall include the following:

A. The date the emergency engine was used.

B. The duration of operation in hours.

C. The reason for the emergency engine usage.

[R307-401-8]

II.B.7.a.2 To determine the duration of operation, the owner/operator shall install a non-resettable hour
meter for each emergency engine. [R307-401-8]

II.B.7.b The owner/operator shall only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives) as
fuel in each stationary diesel emergency engine. [R307-401-8]

II.B.7.b.1 The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur
diesel (ULSD), which has a sulfur content of 15 ppm or less. [R307-401-8]

II.B.7.b.2 To demonstrate compliance with the ULSD fuel requirement, the owner/operator shall maintain
records of diesel fuel purchase invoices or obtain certification of sulfur content from the diesel
fuel supplier. The diesel fuel purchase invoices shall indicate that the diesel fuel meets the
ULSD requirements. [R307-401-8]

II.B.8 Area 32A - Burning Ground Requirements
II.B.8.a The owner/operator shall use the open burning site to destroy only scrap explosive and hazardous
material. The size of the open burning site shall not exceed five (5) acres. [R307-401-8]

DAQE-IN104020060-24
Page 14

II.B.8.b The owner/operator shall not exceed a daily limit of 4,500 lbs of waste propellant and
contaminated waste burned or destroyed per day. [R307-401-8]

II.B.8.b.1 To determine compliance with the daily limit, the owner/operator shall maintain a record of the
quantity of waste burned or destroyed on a daily basis. [R307-401-8]

II.B.8.c When a Salt Lake County "No Burn" order is in effect for wood-burning stoves, open burning of
waste propellant and contaminated wastes shall not be performed, except for unstable wastes.
[R307-401-8]

II.B.8.c.1 The owner/operator shall maintain, with the record of waste burned or destroyed on a daily basis,
a record of whether or not a Salt Lake County "No Burn" order was in effect for that day.
[R307-401-8]

II.B.8.d When a Salt Lake County "No Burn" order is in effect, the owner/operator is allowed to perform
open burning of the most unstable wastes, including nitroglycerin wastes, laboratory-generated
wastes, and unburned reactive wastes from a previous burn attempt. The open burning of
unstable wastes during a Salt Lake County "No Burn" order shall not exceed 400 lbs per day.
[R307-401-8]

II.B.8.d.1 The owner/operator shall maintain a record of the quantity of unstable waste burned or destroyed
during a Salt Lake County "No Burn" order. The record shall include the type of waste burned
or destroyed. [R307-401-8]

II.B.8.e The owner/operator is allowed to destroy the backlog of wastes not burned during the Salt Lake
County "No Burn" order up to a total of 6,000 lbs per day on the days following the burning
restrictions. [R307-401-8]

II.B.8.e.1 The owner/operator shall maintain a record of the quantity of backlogged waste burned or
destroyed on the days following a Salt Lake County "No Burn" order. The record shall include
the date and reason for open burning. [R307-401-8]

II.B.8.f The owner/operator shall not burn wastes exceeding 5% chlorine content unless the following
conditions are all met:

A. Surface wind direction at Building 32A is less than or equal to 112 degrees or
more than or equal to 270 degrees.

B. Elevated wind direction has been verified by a helium balloon.

C. Wind speed does not exceed 15 miles/hr.

[R307-401-8]

II.B.8.f.1 The owner/operator shall verify and record the wind speed and direction measurements prior to
the burn. The owner/operator shall not verify and record the measurements more than ten (10)
minutes before the burn. [R307-401-8]

DAQE-IN104020060-24
Page 15

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents:

Supersedes DAQE-AN104020059-22 dated October 28, 2022
Is Derived From NOI dated September 12, 2023
Incorporates Additional Information dated February 23, 2024

DAQE-IN104020060-24
Page 16

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-NN104020060-24

April 4, 2024

Salt Lake Tribune and Deseret News
Legal Advertising Dept.
P.O. Box 704055
West Valley City, UT 84170
Acct #9001399880

RE: Legal Notice of Intent to Approve

This letter will confirm the authorization to publish the attached NOTICE in the Salt Lake Tribune and
Deseret News on April 7, 2024.

Please mail the invoice and affidavit of publication to the Utah State Department of Environmental
Quality, Division of Air Quality, P.O. Box 144820, Salt Lake City, Utah 84114-4820. If you have any
questions, contact Jeree Greenwood, who may be reached at [phone].

Sincerely,

{{$s }}

Jeree Greenwood
Office Technician

Enclosure

cc: Salt Lake County
cc: Wasatch Front Regional Council

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

DAQE-NN104020060-24
Page 2
NOTICE

A Notice of Intent for the following project submitted in accordance with R307-401-1, Utah
Administrative Code (UAC), has been received for consideration by the Director:

Company Name: Northrop Grumman Systems Corporation
Location: Northrop Grumman Systems Corporation - Bacchus Works- Plant 1 NIROP
Bacchus West – 5000 South 8400 West, West Valley City, UT
Project Description: Northrop Grumman Systems Corporation (NGSC) operates the Bacchus site, an
existing rocket propulsion plant in West Valley City. NGSC has requested to
install Project Prime, which includes new buildings and equipment to support
increased rocket motor manufacturing.

The completed engineering evaluation and air quality impact analysis showed the proposed project meets
the requirements of federal air quality regulations and the State air quality rules. The Director intends to
issue an Approval Order pending a 30-day public comment period. The project proposal, estimate of the
effect on local air quality and draft Approval Order are available for public inspection and comment at the
Utah Division of Air Quality, 195 North 1950 West, Salt Lake City, UT 84116. Written comments
received by the Division at this same address on or before May 7, 2024 will be considered in making the
final decision on the approval/disapproval of the proposed project. Email comments will also be accepted
at [e-mail]. If anyone so requests to the Director in writing within 15 days of publication of
this notice, a hearing will be held in accordance with
R307-401-7, UAC.

Under Section 19-1-301.5, a person who wishes to challenge a Permit Order may only raise an issue or
argument during an adjudicatory proceeding that was raised during the public comment period and was
supported with sufficient information or documentation to enable the Director to fully consider the
substance and significance of the issue.

Date of Notice: April 7, 2024

{{#s=Sig_es_:signer1:signature}}

4/8/24, 10:42 AM utahlegals.com/(S(c1ti1vab0bzswl2yqqiosqr2))/DetailsPrint.aspx?SID=c1ti1vab0bzswl2yqqiosqr2&ID=182276
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The Salt Lake Tribune
Publication Name:
The Salt Lake Tribune
Publication URL:
Publication City and State:
Salt Lake City, UT
Publication County:
Salt Lake
Notice Popular Keyword Category:
Notice Keywords:
bacchus
Notice Authentication Number:
202404081142198518912
1761527914
Notice URL:
Back
Notice Publish Date:
Sunday, April 07, 2024
Notice Content
NOTICE A Notice of Intent for the following project submitted in accordance with R307-401-1, Utah Administrative Code (UAC), has been
received for consideration by the Director: Company Name: Northrop Grumman Systems Corporation Location: Northrop Grumman Systems
Corporation - Bacchus Works- Plant 1 NIROP Bacchus West – 5000 South 8400 West, West Valley City, UT Project Description: Northrop
Grumman Systems Corporation (NGSC) operates the Bacchus site, an existing rocket propulsion plant in West Valley City. NGSC has
requested to install Project Prime, which includes new buildings and equipment to support increased rocket motor manufacturing. The
completed engineering evaluation and air quality impact analysis showed the proposed project meets the requirements of federal air quality
regulations and the State air quality rules. The Director intends to issue an Approval Order pending a 30-day public comment period. The
project proposal, estimate of the effect on local air quality and draft Approval Order are available for public inspection and comment at the
Utah Division of Air Quality, 195 North 1950 West, Salt Lake City, UT 84116. Written comments received by the Division at this same address
on or before May 7, 2024 will be considered in making the final decision on the approval/disapproval of the proposed project. Email
comments will also be accepted at [e-mail]. If anyone so requests to the Director in writing within 15 days of publication of this
notice, a hearing will be held in accordance with R307-401-7, UAC. Under Section 19-1-301.5, a person who wishes to challenge a Permit
Order may only raise an issue or argument during an adjudicatory proceeding that was raised during the public comment period and was
supported with sufficient information or documentation to enable the Director to fully consider the substance and significance of the issue.
Date of Notice: April 7, 2024 SLT0026926
Back
t
State of Utah
SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor
March 13, 2024
Kris Blauer
Northrop Grumman Systems Corporation
M/S F/1/EV
P.O. Box 98
Magna, UT 840440098
[e-mail]
Dear Kris Blauer,
RN104020060
Re: Engineer Review:
Modification to Approval Order to DAQE-AN104020059-22, Project Prime at the Bacchus
Works Facility
Project Number: N 104020060
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 permitting program. Northrop Grumman
Systems Corporation should complete this review within 10 business days of receipt.
Northrop Grumman Systems Corporation should contact Tad Anderson at [phone] if there are
questions or concerns with the review of the draft permit conditions. Upon resolution of your concerns,
please email Tad Anderson at [e-mail] the signed cover letter. Upon receipt of the signed
cover letter, the DAQ will prepare an ITA for a 30-day public comment period. At the completion of the
comment period, the DAQ will address any comments and will prepare an Approval Order (AO) for
signature by the DAQ Director.
If Northrop Grumman Systems Corporation does not respond to this letter within 10 business days, the
project will move forward without source concurrence. If Northrop Grumman Systems Corporation has
concerns that cannot be resolved and the project becomes stagnant, the DAQ Director may issue an Order
prohibiting construction. _____
Approval Signature ,- iN! L(L-. V- 2 7) 7
(Signature & Date)
Department of
Environmental Quality
Kimberly D. Shelley
Executive Director
DIVISION OF AIR QUALITY
Bryce C. Bird
Director
195 North 1950 West " Salt Lake City. UT
Mailing Address: P.O. Box 144820 " Salt Lake City, UT 14114-4820
Telephone [phone] " Fax [phone] " T.D.D. [phone]
wwsv.deq.urah.gov
Printed on 100% recycled paper

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UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION

Project Number N104020060
Owner Name Northrop Grumman Systems Corporation
Mailing Address M/S F/1/EV
P.O. Box 98
Magna, UT, 840440098

Source Name Northrop Grumman Systems Corporation - Bacchus Works-
Plant 1 NIROP Bacchus West
Source Location 5000 South 8400 West
West Valley City, UT 84044

UTM Projection 409,700 m Easting, 4,502,100 m Northing
UTM Datum NAD27
UTM Zone UTM Zone 12
SIC Code 3761 (Guided Missiles & Space Vehicles)

Source Contact Allia Abdallah
Phone Number [phone]
Email [e-mail]

Billing Contact Kris Blauer
Phone Number [phone]
Email [e-mail]

Project Engineer Tad Anderson, Engineer
Phone Number [phone]
Email [e-mail]

Notice of Intent (NOI) Submitted May 17, 2023
Date of Accepted Application October 30, 2023

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SOURCE DESCRIPTION

General Description
Northrop Grumman Systems Corporation (NGSC) operates the Bacchus site, an existing rocket
propulsion plant in West Valley City, Salt Lake County. The NGSC Bacchus site manufactures
solid fuel rocket motors for NASA and the Department of Defense. The manufacturing
operations at this plant includes rocket case preparation buildings, cyclotetramethylene-
tetranitramine (HMX) grinding and drying processes for making solid rocket fuel, propellant
sampling and machining, and an open burning ground for the routine burning of explosive and
flammable wastes.

NSR Classification:
Minor Modification at Minor Source

Source Classification
Located in, Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA, Salt Lake County
SO2 NAA, Salt Lake County
Airs Source Size: SM

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
MACT (Part 63), CCCCCC: National Emission Standards for Hazardous Air Pollutants for
Source Category: Gasoline Dispensing Facilities

Project Proposal
Modification to Approval Order to DAQE-AN104020059-22, Project Prime at the Baccus Works
Facility

Project Description
NGSC has requested to install Project Prime which includes new buildings and equipment to
support increased rocket motor manufacturing at the Bacchus work site located in West Valley
City. The Project Prime consists of adding to the existing Cast and Cure operations (adding Cast
Cure 3 (CC3-building 2617) and Cast Cure 4 (CC4-building 2618) as part of the Cast Cure
Complex), adding to the existing Mix Bowl Cleaning operations (adding Mix Bowl Cleaning 4
(MBC4-buildings 2609 and 2610)), adding to the existing Finishing operations (adding Finishing
8 (FIN8-building 2613)), adding to the existing Shipping operations (adding Shipping 6 (SHIP6-
building 2611)), adding a Pre-Batch Storage Building (building 2603), increase operations in the
Pre-Mix Process (building 10A), and adding fiberglass cutting operations to the existing building
17A.

The new CC3 and CC4 buildings will be used for the cast, cure, and disassembly of rocket
motors. The new CC3 and CC4 will cast pits where motors are cast and cured with rocket motor
propellant. Mix bowls will be brought in through the existing tramway and propellant will be

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cast into the motor. The following new equipment is required for the CC3 and CC4 operations; 3
natural gas-fired low NOx boilers with flue-gas recirculation each rated less than 2.0 MMBtu/hr, 2
natural gas-fired low NOx boilers each rated less than 1.0 MMBtu/hr, 3 natural gas-fired
heaters/air handlers each less than 1 MMBtu/hr, a 4,309 hp diesel-fired emergency generator and
material handling operations containing VOC and/or HAP's.

The new MBC4 building will be used to clean mixing bowls following casting and to remove
cured propellant from cast tooling. The mix bowls are cleaned using a mix bowl cleaning robot
and smaller tools are hand-wiped in a fume hood. The following new equipment is required for
the MBC4 operations; 2 natural gas-fired low NOx boilers with flue-gas recirculation each rated
less than 2.0 MMBtu/hr each, 2 natural gas-fired heaters each less than 1 MMBtu/hr, 1 755 hp
diesel-fired emergency generator, 1 fume hood and material cleaning operations containing VOC.

The Finishing operations are where loaded motors are brought to attach nozzles and final finishes
are hand-applied, including paint and sealant. The following new equipment is required for the
FIN8 operations; 2 natural gas-fired low NOx boilers with flue-gas recirculation each rated less
than 2.0 MMBtu/hr each, 2 fume hoods and material handling operations containing VOC and/or
HAP's.

Shipping operations are where finished motors are stored prior to shipping. Natural gas-fired
boilers are the only emissions-emitting equipment in this building. The following new equipment
is required for the SHIP6 operations; 2 natural gas-fired low NOx boilers with flue-gas
recirculation each rated less than 2.0 MMBtu/hr each.

The Pre-Batch Storage building 2603 is simply a location to hold materials prior to use. The
following new equipment is required for the Pre-Batch Storage building 2603; 2 natural gas-fired
low NOx boilers each rated less than 2.0 MMBtu/hr each.

EMISSION IMPACT ANALYSIS
Modeling is not required as R307-410-4 and R307-410-5. Modeling was conducted for Hexamethylene-1, 6-
Diisocyanate and Chromium Compounds and a memo was generated by the UDAQ technical impact analysis
section MN104020060-24. [Last updated March 12, 2024]

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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)
CO2 Equivalent -10330 32764.00
Carbon Monoxide -6.02 27.78
Nitrogen Oxides -3.35 49.64
Particulate Matter - PM10 -0.35 51.32
Particulate Matter - PM2.5 -0.35 51.25
Sulfur Oxides -0.08 0.60
Volatile Organic Compounds 3.24 46.77

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
1-Bromopropane (CAS #106945) 0 1500
2,4-Toluene Diisocyanate (CAS #584849) 0 1960
4,4-Methylenedianiline (CAS #101779) 0 500
Chlorine (CAS #7782505) 0 400
Chromium Compounds (CAS #CMJ500) 0 200
Ethyl Benzene (CAS #100414) 0 3000
Ethylene Dichloride (1,2-Dichloroethane) (CAS #107062) 0 500
Formaldehyde (CAS #50000) 0 200
Generic HAPs (CAS #GHAPS) 0 3980
Glycol Ethers (CAS #EDF109) 0 500
Hexamethylene-1,6-Diisocyanate (CAS #822060) 0 1900
Hexane (CAS #110543) 0 4600
Hydrochloric Acid (Hydrogen Chloride) (CAS #7647010) 0 7000
Maleic Anhydride (CAS #108316) 0 500
Methanol (CAS #67561) 0 2000
Methyl Chloroform (1,1,1-Trichloroethane) (CAS #71556) 0 2000
Methyl Isobutyl Ketone (Hexone) (CAS #108101) 0 2000
Methylene Chloride (Dichloromethane) (CAS #75092) 0 1000
Methylene Diphenyl Diisocyanate (MDI) (CAS #101688) 0 1160
Toluene (CAS #108883) 0 6000
Xylenes (Isomers And Mixture) (CAS #1330207) 0 8000
Change (TPY) Total (TPY)
Total HAPs 0 24.45

Note: Change in emissions indicates the difference between previous AO and proposed modification.

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Review of BACT for New/Modified Emission Units

1. BACT review regarding BACT
BACT was conducted using a top-down analysis process. The BACT was broken down into
Emergency generators, Natural gas-fired boilers less than 2.0 MMBtu/hr, Natural gas-fired
equipment, Material use, Mixing bowl cleaning, Fume hoods, Pre-mix Process and fiberglass
cutting.

Emergency generators
NGSC has proposed installing 2 new emergency generators with a capacity of 4309 and 755 bhp.
The proposed diesel-fired emergency generators will be certified to meet Tier 2 emission standards
found in 40 CFR Part 1039 as specified in NSPS Subpart IIII. These standards are 6.4 g/kW-hr for
NMHC + NOx, 3.5 g/kW-hr for CO, and 0.20 g/kW-hr for PM. The use of these engines are by
definition (emergency generator engines) limited to 100 hours of operation or less per year for
maintenance for testing. A BACT analysis was performed to determine that all controls are
technically and economically feasible. BACT to control emissions from the emergency generator
engines is; conduct proper maintenance according to the
Manufacturer specifications, limit visible emissions to 20%, use low-sulfur diesel fuel and each
emergency generator engine is limited to 100 hours of operation for testing and maintenance.

Natural gas-fired boilers less than 2.0 MMBtu/hr
A BACT analysis was conducted on the 13 boilers with a capacity less than 2 MMBtu/hr. The
BACT analysis mainly focused on the NOx and CO emissions and took the following control
technologies into consideration: Selective Catalytic Reduction (SCR), Low NOx (LN) burners and
with Flue Gas Recirculation (FGR), clean fuel operation and good combustion practices.

NOx and CO emissions
All natural gas-fired boilers will be rated less than 2 MMBtu/hr. These boilers will be equipped
with low NOx burners, as required under Utah Administrative Code (UAC) Section R307-401-
4(3). NGSC spoke with several boiler manufacturers and was unable to find small (< 2 MMBtu/hr)
natural gas equipment manufactured with ultra-low NOx burners making this technically
unfeasible. The use of low NOx burners and good combustion practices are considered BACT for
natural gas boilers with the capacity less than 2 MMBtu/hr. BACT to control NOx and CO
emissions from the process boilers is the use of Low NOx burners with clean fuel operation and
good combustion practices and a 10% opacity.

Natural gas-fired equipment
The natural gas-fired heaters and AHU are small, each rated at less than 0.05 MMBtu/hr. This
small equipment is not manufactured with low NOx burners. BACT for natural gas-fired equipment
is use of clean fuel operation and good combustion practices and a 10% opacity.

Material use
Materials containing VOCs and/or HAPs will be used in the CCC and FIN8 buildings. Materials in
the CCC and FIN8 are hand-applied and emissions (1.85 TPY of VOC for CCC building and 1.04
TPY of VOC for FIN8) are based on material usage. VOC and HAP emissions are ventilated
through each building's exhaust from multiple workstations. Separate control technologies would
be needed for each building. BACT for material use in buildings CCC and FIN8 is best workplace
practices to minimize excess VOC/HAP emissions, keeping containers closed and promptly
cleaning spilled materials.

Mixing bowl cleaning

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The mix bowl cleaning process is similar to a simple spray sink cold cleaner degreaser for solvent
degreasing. The propellant mixing bowls are cleaned with a volatile solvent after every mix. The
cleaning material does not contain HAPs. BACT for mix bowl cleaning is best workplace
practices to minimize excess VOC emissions, keeping containers closed and promptly cleaning
spilled materials.
[Last updated March 12, 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 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.2 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.3 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.4 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.5 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

I.6 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-
150]

I.7 The owner/operator shall submit documentation of the status of construction or modification
to the Director within 18 months from the date of this AO. This AO may become invalid if
construction is not commenced within 18 months from the date of this AO or if construction is
discontinued for 18 months or more. To ensure proper credit when notifying the Director,
send the documentation to the Director, attn.: NSR Section. [R307-401-18]

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I.8 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]

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 Bacchus Works: Plant 1/NIROP/Bacchus West
Rocket propulsion plant in West Valley City

II.A.2 Building 8501
Powerhouse Boilers

A. Nebraska natural gas-fired boiler - rated at 50,000 lb/hr (66 MMBtu/hr)
B. Murray natural gas-fired boiler - rated at 50,000 lb/hr (66 MMBtu/hr)

II.A.3 Building 4B
Ammonium Perchlorate Processing

Control: Pulse jet baghouse and HEPA filtration system
Baghouse maximum flow rate: 400 acfm
Baghouse pressure drop range during processing: Between 1 and 5.2 inches of H2O

II.A.4
NEW
Building 17A (NEW)
Fiberglass Cutting

Vacuum dust collector

II.A.5 Building 2387
HMX Dryer Building

HMX Dryer
Control: Condenser
Dryer Stack V-1 (emits IPA and water vapor)

IPA vapor ventilation hood
Vents inside, listed for informational purposes only

II.A.6 Building 2440
3-D Carbon/Carbon

Process control: Fume incinerator, 1 MMBtu/hr rate
Process control: Central vacuum system

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II.A.7 Building 2471
Case Preparation

A. Surface preparation activities
Control: Pulse jet baghouse
Baghouse maximum flow rate: 1,500 acfm
Baghouse pressure drop range: Between 1 and 7 inches of H2O

B. Two paint spray booths
Control: High efficiency 3-stage fabric filters

C. Three spray lance robot booths: SLR-1, SLR-2, SLR-3
Control: Fabric filters

II.A.8
NEW
Diesel-Fired Emergency Generators >600 Hp (NEW)
Building Location Maximum Hp rating
35A 755*
55, Stores 755*
2428, Al/AP Prep 804
2444, Mix #1 1340
2449, Cast Cure #1 (south) 1005
2484, Mix #3 1474
2489(A), Cast Cure #2 (west) 1005
2489(B), Cast Cure #2 (east) 1005
2500, Mix #2A 1340
2609, MBC#4 755* (NEW)
2617, 2618, Cast Cure #3 & #4 4309* (NEW)
8608, Plt.#1 Powerhouse 755*

*NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ (applies to all)

II.A.9 Diesel-Fired Emergency Generators 100-600 Hp
Building Location Maximum Hp rating
27-A, Laboratory 335*
56, Compressor Building 402
2430, Al-Premix 469
2450, Control House 268
2466, Mix Bowl Clean #2 469
2498, Mix Bowl Clean #3 536
2507, Subscale ReCast 469
8501, Powerhouse 464*
8503, Compressor House 268
8569, Wastewater 335
8695, Pumphouse #3 268

*NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ (applies to all)

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II.A.10 Diesel-Fired Emergency Generators <100 Hp
Building Location Maximum Hp rating
55, Material 72
8100D, (Admin) PBX 81

MACT Applicability: Subpart ZZZZ (applies to all)

II.A.11 Natural Gas-Fired Emergency Generator
Building Location Maximum Hp rating
2440, 3D Carbon 163

NSPS Applicability: Subpart JJJJ
MACT Applicability: Subpart ZZZZ

II.A.12 Propane-Fired Emergency Generator
Building Location Maximum Hp rating
8275, Microwave Station 16

MACT Applicability: Subpart ZZZZ

II.A.13 Area 32A
Burning Grounds

II.A.14 Miscellaneous Natural Gas-fired Equipment
Natural gas-fired boilers, air handlers, heaters, and water heaters less than 5 MMBTU/hr

II.A.15 Miscellaneous Buildings
Includes: miscellaneous operations, spray booths, baghouses, ovens, dust collectors, gasoline
and diesel tanks, and other processes

Gasoline storage tank MACT applicability: Subpart CCCCCC

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 Sitewide Requirements
II.B.1.a The owner/operator shall not allow visible emissions from the following emission points to
exceed the following values:

A. Diesel-fired emergency generators - 20% opacity
B. All other point or fugitive emissions sources, excluding the burning grounds - 10%
opacity. [R307-401-8]

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II.B.1.a.1 Opacity observations of emissions from stationary sources, except haul roads, shall be
conducted according to 40 CFR 60, Appendix A, Method 9. [R307-401-8]

II.B.1.a.2 Visible emission determinations for fugitive dust from haul roads shall use procedures similar
to Method 9. The normal requirement for observations to be made at 15-second intervals over
a six-minute period, however, shall not apply. Visible emissions shall be measured at the
densest point of the plume but at a point not less than one-half vehicle length behind the
vehicle and not less than one-half the height of the vehicle. [R307-401-8]

II.B.1.b The owner/operator shall equip each paint spray booth with paint arrestor particulate filters, or
equivalent, to control particulate emissions. All air exiting the booths shall pass through this
control system before being vented to the atmosphere. [R307-401-8]

II.B.1.c Except when in use, the owner/operator shall store all VOC- and/or HAPs-containing
materials and VOC- and/or HAPs-laden rags in covered containers. [R307-401-8]

II.B.1.d
NEW
The owner/operator shall not emit more than the following for plant-wide emissions of HAPs:

A. 0.98 tons per rolling 12-month period for 2,4 Toluene Diisocyanate
B. 0.58 tons per rolling 12-month period for Methylene Diphenyl Diisocyanate
C. 1.00 tons per rolling 12-month period for Methyl Chloroform
D. 1.00 tons per rolling 12-month period for Methanol
E. 0.10 tons per rolling 12-month period for Chromium Compounds
F. 1.00 tons per rolling 12-month period for Methyl Isobutyl Ketone
G. 0.95 tons per rolling 12-month period for Hexamethylene-1,6-Diisocyanate
H. 1.50 tons per rolling 12-month period for Ethyl Benzene
I. 2.30 tons per rolling 12-month period for Hexane
J. 3.00 tons per rolling 12-month period for Toluene
K. 3.50 tons per rolling 12-month period for Hydrochloric Acid
L. 4.00 tons per rolling 12-month period for Xylene. [R307-401-8]

II.B.1.d.1 To determine compliance with a 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.
HAP emissions shall be determined by maintaining a record of HAP-emitting materials used,
burned, or destroyed each month. [R307-401-8]

II.B.2 Building 4B - Ammonium Perchlorate Processing Building
II.B.2.a The owner/operator shall control emissions from the ammonium perchlorate process with a
baghouse and HEPA filtration system in series. Emissions from the ammonium perchlorate
process shall be routed to the operating baghouse and HEPA filtration system before being
discharged to the atmosphere. [R307-401-8]

II.B.2.a.1 The owner/operator shall install and maintain a high-pressure differential interlock in the
HEPA filtration system to shut down the ammonium perchlorate process when the pressure
differential goes above the maximum operating set point of 5.2 inches of water column for
more than 60 seconds. The ammonium perchlorate process shall not operate without the
operating HEPA filtration system interlock. [R307-401-8]

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II.B.2.a.2 The owner/operator shall record the pressure drop readings from the differential pressure
transmitters on a daily basis. [R307-401-8]

II.B.3 Building 2387 (CD3A) - HMX Dryer Building Requirements
II.B.3.a The owner/operator shall control emissions from the HMX dryer with the condenser.
Emissions from the HMX dryer shall be routed to the operating condenser before being
discharged to the atmosphere. [R307-401-8]

II.B.3.b The owner/operator shall not exceed 450 drying cycles of HMX per rolling 12-month period.
[R307-401-8]

II.B.3.b.1 To determine compliance with a 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.
Drying cycles of HMX shall be determined by an operations log. [R307-401-8]

II.B.4 Building 2440 - 3D Carbon Building Requirements
II.B.4.a The fume incinerator shall control carbon vapor deposition (CVD) emissions from the 3D
carbon process. All CVD emissions shall be routed to the operating fume incinerator before
being discharged to the atmosphere. [R307-401-8]

II.B.4.b At all times while incinerating CVD emissions, the owner/operator shall maintain a
temperature at or above 1,500 degrees Fahrenheit in the fume incinerator. [R307-401-8]

II.B.4.b.1 The owner/operator shall install, calibrate, maintain, and operate a device to monitor the
operating temperature of the fume incinerator. The monitoring device shall be located such
that an inspector/operator can safely read the output at any time. The operating temperature of
the fume incinerator shall be recorded on a daily basis when the incinerator operates. [R307-
401-8]

II.B.4.c The owner/operator shall operate the fume incinerator at a minimum residence time of 0.5
seconds. [R307-401-8]

II.B.4.c.1 The owner/operator shall maintain the
Manufacturer's specifications or analysis documenting an incinerator design residence time of
no less than 0.5 seconds at maximum flow rate. This documentation shall be kept on site and
be readily available for inspection upon request. [R307-401-8]

II.B.4.d The owner/operator shall equip each weaving machine's ventilation exhaust with particulate
filters to control particulate emissions. All exhaust exiting the weaving machines shall pass
through this control system before being vented to the atmosphere. [R307-401-8]

II.B.4.e The owner/operator shall equip the central vacuum system with particulate filters to control
particulate emissions. All air exiting the central vacuum system shall pass through this control
system before being vented to the atmosphere. [R307-401-8]

II.B.5 Building 2471 - Case Preparation Building Requirements
II.B.5.a The owner/operator shall not exceed 14.0 tons of VOC emissions per rolling 12-month period
for all operations in Building 2471. [R307-401-8]

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II.B.5.a.1 To determine compliance with a 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.
VOC emissions shall be determined by maintaining a record of VOC-emitting materials used
each month. The record shall include the following data for each material used:

A. Name of the VOC- emitting material, such as: paint, adhesive, solvent, thinner,
reducers, chemical compounds, toxics, isocyanates, etc.
B. Density of each VOC-emitting material used (lbs per gallon)
C. Maximum percent by weight of all VOC in each material used
D. Mass of each VOC-emitting material used
E. The emission release factor (ERF) associated with each type of VOC-emitting
material
F. The amount of VOC emitted monthly from each material used. The amount of VOC
emitted monthly by each material used shall be calculated by the following procedure:
VOC = (%VOC by Weight)/100 x [Density (lb/gal)] x (Gal Consumed) x (1 ton/2,000 lb) x
ERF

(example if unit of measure is gallons)

G. The total amount of VOC emitted monthly from all materials used
H. The amount of VOCs reclaimed for the month shall be similarly quantified and
subtracted from the quantities calculated above to provide the monthly total VOC
emissions. [R307-401-8]

II.B.5.b The owner/operator shall vent all air exiting the Building 2471 spray lance robot booth SLR-1
with a stack release height of no less than 39' 3'' as measured from the base of the stack.
[R307-401-8]

II.B.6 Fuel Requirements
II.B.6.a The owner/operator shall not exceed a total natural gas consumption limit of 633,000 MMBtu
per rolling 12-month period for all natural gas-fired equipment on site. [R307-401-8]

II.B.6.a.1 To determine compliance with a 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.
Natural gas consumption shall be determined by gas billing records. [R307-401-8]

II.B.6.b The owner/operator shall use only natural gas as the primary fuel in all fuel-burning furnaces,
ovens, boilers, and fume incinerators, and only use fuel oil as a backup fuel in all fuel-burning
boilers. [R307-401-8]

II.B.6.c The owner/operator shall limit fuel oil usage in all fuel-burning boilers to 48 hours each per
rolling 12-month period for periodic testing, maintenance, or operator training. There is no
time limit on the use of fuel oil in the fuel-burning boilers during periods of natural gas
curtailment, gas supply interruption, or startups. [R307-401-8]

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II.B.6.c.1 To determine compliance with a 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.
Records documenting fuel oil usage in each fuel-burning boiler shall be kept in a log and shall
include the following:

A. The date fuel oil was used
B. The duration of operation in hours
C. The reason for fuel oil usage. [R307-401-8]

II.B.6.d The sulfur content of any fuel oil burned in all fuel-burning boilers on site shall not exceed
0.50% by weight. [R307-401-8]

II.B.6.d.1 The sulfur content shall be determined by the American Standard for Testing and Materials
(ASTM) Method D2880-71, D-4294-89, or approved equivalent. Certification of fuel oil shall
be either by the owner/operator's own testing or by test reports from the fuel oil marketer.
[R307-401-8]

II.B.7 Emergency Engine Requirements
II.B.7.a The owner/operator shall not operate each emergency engine on site for more than 100 hours
per year during non-emergency situations. There is no time limit on the use of the engines
during emergencies. [R307-401-8]

II.B.7.a.1 To determine compliance with a yearly total, the owner/operator shall update records
documenting generator usage by January 30th for the preceding year. Records documenting
the operation of each emergency engine shall be kept in a log and shall include the following:

A. The date the emergency engine was used
B. The duration of operation in hours
C. The reason for the emergency engine usage. [R307-401-8]

II.B.7.a.2 To determine the duration of operation, the owner/operator shall install a non-resettable hour
meter for each emergency engine. [R307-401-8]

II.B.7.b The owner/operator shall only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives)
as fuel in each stationary diesel emergency engine. [R307-401-8]

II.B.7.b.1 The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur
diesel (ULSD), which has a sulfur content of 15 ppm or less. [R307-401-8]

II.B.7.b.2 To demonstrate compliance with the ULSD fuel requirement, the owner/operator shall
maintain records of diesel fuel purchase invoices or obtain certification of sulfur content from
the diesel fuel supplier. The diesel fuel purchase invoices shall indicate that the diesel fuel
meets the ULSD requirements. [R307-401-8]

II.B.8 Area 32A - Burning Ground Requirements
II.B.8.a The owner/operator shall use the open burning site to destroy only scrap explosive and
hazardous material. The size of the open burning site shall not exceed five acres. [R307-401-
8]

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Page 14
II.B.8.b The owner/operator shall not exceed a daily limit of 4,500 lbs of waste propellant and
contaminated waste burned or destroyed per day. [R307-401-8]

II.B.8.b.1 To determine compliance with the daily limit, the owner/operator shall maintain a record of
the quantity of waste burned or destroyed on a daily basis. [R307-401-8]

II.B.8.c When a Salt Lake County "No Burn" order is in effect for wood-burning stoves, open burning
of waste propellant and contaminated wastes shall not be performed, except for unstable
wastes. [R307-401-8]

II.B.8.c.1 The owner/operator shall maintain, with the record of waste burned or destroyed on a daily
basis, a record of whether or not a Salt Lake County "No Burn" order was in effect for that
day. [R307-401-8]

II.B.8.d When a Salt Lake County "No Burn" order is in effect, the owner/operator is allowed to
perform open burning of the most unstable wastes, including nitroglycerin wastes, laboratory-
generated wastes, and unburned reactive wastes from a previous burn attempt. The open
burning of unstable wastes during a Salt Lake County "No Burn" order shall not exceed 400
lbs per day. [R307-401-8]

II.B.8.d.1 The owner/operator shall maintain a record of the quantity of unstable waste burned or
destroyed during a Salt Lake County "No Burn" order. The record shall include the type of
waste burned or destroyed. [R307-401-8]

II.B.8.e The owner/operator is allowed to destroy the backlog of wastes not burned during the Salt
Lake County "No Burn" order up to a total of 6,000 lbs per day on the days following the
burning restrictions. [R307-401-8]

II.B.8.e.1 The owner/operator shall maintain a record of the quantity of backlogged waste burned or
destroyed on the days following a Salt Lake County "No Burn" order. The record shall
include the date and reason for open burning. [R307-401-8]

II.B.8.f The owner/operator shall not burn wastes exceeding 5% chlorine content unless the following
conditions are all met:

A. Surface wind direction at Building 32A is less than or equal to 112 degrees or more
than or equal to 270 degrees
B. Elevated wind direction has been verified by a helium balloon
C. Wind speed does not exceed 15 miles/hr. [R307-401-8]

II.B.8.f.1 The owner/operator shall verify and record the wind speed and direction measurements prior
to the burn. The owner/operator shall not verify and record the measurements more than ten
minutes before the burn. [R307-401-8]

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Page 15
PERMIT HISTORY

When issued, the approval order shall supersede (if a modification) or will be based on the
following documents:

Incorporates Additional Information dated February 23, 2024
Is Derived From NOI dated September 12, 2023
Supersedes DAQE-AN104020095-22 dated October 19, 2022

REVIEWER COMMENTS

1. Comment regarding Emission Estimates:
The emergency generators emissions estimates use the emissions factor from EPA Tier 2 standards
with a SO2 being estimated using ULSD. The hours of operation used in the emissions calculation
(and limited by) used 100 hours per year. The greenhouse gas emissions were estimated using 40
CFR Subpart C.

The emissions estimates for natural gas operated equipment used LNOx burners classification in
EPA AP-42 Chapter 1.4 emissions factors. The emissions from natural gas operated equipment are
limited to the source wide natural gas consumption limit. The greenhouse gas emissions were
estimated using 40 CFR Subpart C.

The material usage operations (Cast Cure Complex, Pre-Mix Process and Finishing 8) emissions
estimates used a mass balance technique and MSDS's with throughput limits.

The Mix Bowl Cleaning operations (solvent degreasing) emissions estimates used AP-42 Chapter
4.6 and throughput limits.

The Fiberglass cutting operations emissions estimates used a baseline emissions factor of 0.016
grains per dry standard cubic foot. The specifications for an ASHRAE 52.2 MERV 11 filter were
used to calculate the efficiency increase to a MERV 15 filter. The PM2.5 emission factor used for
filter efficiency is 0.0136 gr/dscf. The fiberglass fabric will occasionally have an adhesive applied to
the surface. The two-part adhesive has a small amount of toluene, so VOC and HAPs emissions were
estimated using the estimated annual adhesive quantity.

The PTE emissions estimates for this permit modification used the emissions from the removed
equipment and the emissions from the addition of the new equipment. A site wide operations
emissions estimate was not conducted. [Last updated December 5, 2023]

2. Comment regarding HAP Emissions:
NGSC had an existing HAP limit of 24.9 TPY of combined HAPs and a 9.9 TPY limit for a single
HAP. UDAQ has requested NGSC to provide a specific HAP list and new limits were included in
the updated AO.

The NGSC, Bacchus work facility has a generic HAP limit of 1.99 which contains combined HAPs
that change per process. The HAPs listed in the plant wide HAP emissions limit are listed for
tracking. There are more HAPs being emitted at the source that are listed in the emissions summary
and included in the generic HAPs.
[Last updated December 18, 2023]

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Page 16

3. Comment regarding New Building Not Listed:
The following new buildings were not included in the equipment list since the only equipment being
installed is natural gas-operated equipment with the capacity below 5 MMBtu/hr: Finishing 8
Building (FIN8, 2613), Shipping 6 Building (SHIP6, 2611), and Pre-Batch Storage Building (2603).
[Last updated November 2, 2023]

4. Comment regarding New Equipment Below 5 MMBtu/hr:
The following natural gas-fired equipment is recognized in the permit modification but are classified
as miscellaneous natural gas-fired equipment less than 5 MMBtu/hr capacity and subject to UAC
R307-401-10 - Source Category Exemptions:

LocationEquipment Capacity (MMBtu/hr)
2617, 26183-LNOx-FGR Boilers 1.70 (each)
2617, 26182-LNOx-Boilers 0.50 (each)
2617, 26182-N.G. Heaters 0.03 (each)
2617, 2618N.G. air handler 0.04
2609, 26102-LNOx-FGR Boilers 1.70 (each)
2609, 26102-N.G. Heaters 0.03 (each)
2613, 2-LNOx-FGR Boilers 1.36 (each)
2611, 2-LNOx-FGR Boilers 1.36 (each)
2603, 2-LNOx-Boilers 0.399 (each)
[Last updated December 19, 2023]

5. Comment regarding Source Classification:
NGSC is located in a serious ozone nonattainment area. The Bacchus Works facility has the PTE
emissions of NOx and VOC below the major threshold values of 50 TPY for either pollutant. This
makes this facility a minor source and the increase in emissions are below the significant levels
making this a minor modification. [Last updated December 19, 2023]

6. Comment regarding Emissions Offsets:
This facility is a minor source is located in Salt Lake County which is a Nonattainment are for
Ozone, PM10 and PM2.5. A minor source conducting a minor modification does not trigger offsets
under UAC R307-420-3 or UAC R307-421-3. This permit modification does not trigger offsets of
either Ozone, PM10 or PM2.5. [Last updated November 2, 2023]

7. Comment regarding Removed Equipment:
NGSC has requested to remove a 42 MMBtu/hr natural gas-fired low NOx boiler with FGR (building
8504). The emissions associated with this piece of equipment were calculated and the PTE
emissions were removed from the facility wide PTEs.

NGSC has requested to remove the Spray lance robot booth, SLR-4 (building 2471, Case
Preparation). The emissions associated with this piece of equipment were calculated and the PTE
emissions were removed from the facility wide PTEs.
[Last updated November 2, 2023]

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Page 17
8. Comment regarding Updated Conditions:
NGSC has requested to update the natural gas consumption limit from 733,000 MMBtu per rolling
12-month period to 633,000 MMBtu per rolling 12-month period. The VOC limit for Building 2471
has been updated from 16.0 tons per 12-month rolling period to 14 tons per 12-month rolling period.
The emissions associated with these condition updates were calculated and the PTE emissions were
removed from the facility wide PTEs.

NGSC requested that the location for the 755 hp "8501 Plt. #1 Powerhouse" diesel-fired emergency
generator be updated. The generator will be moved from Building 8501 to an adjacent building,
Building 8608.
[Last updated November 2, 2023]

9. Comment regarding HAP Emission Limits:
The HAPs for this process equipment AO have been broken down and accounted for. The previous
permit had an emissions rate of 24.9 tons per year of combined HAPs. DAQ has requested a
breakout of HAP emissions quantities for this AO. Specific HAPs were listed in the VOC
requirements and the general 24.9 tons per year limit was removed. The accounting of the source
wide HAPs has a category of generic HAPs of 1.99 tons per year is still listed in the emission
summary to account for minor fluctuations in operations with products containing HAP's. [Last
updated February 23, 2024]

10. Comment regarding Site Specific Emission Factors:
NGSC has requested to document the following emission factors used to estimate the amount of
HAP emitted from materials burned or destroyed:

A.1.1 propellant EFs (lb/lb)
HCl = 0.014
Cl2 = 3.1 x 10-5

B.1.3 propellant EFs (lb/lb)
HCl = 0.0032
Cl2 = 0.0 (not detected)
[Last updated December 18, 2023]

11. Comment regarding Additional Information:
Additional Information was submitted to UDAQ addressing impact analysis of Hexamethylene-1, 6-
Diisocyanate and Chromium Compounds. The additional information has the result of memo
generated by the UDAQ technical impact analysis section MN104020060-24. The engineering
review has the source tracking 0.95 tons per year of Hexamethylene-1, 6-Diisocyanate and 0.1 tons
per year of Chromium Compounds as a condition. [Last updated February 23, 2024]

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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

2022 Emissions Inventory Report
Emissions Summary for ATK Launch Systems, Inc. - Bacchus Works - Plant 1 NIROP Bacchus West
(10402)
CRITERIA AIR POLLUTANT (CAP) EMISSIONS TOTALS
Pollutant Code/CAS #Pollutant Name Emissions
(tons, excluding
tailpipe)
Tailpipe
Emissions
(tons)
Total Emissions
(tons)*
PM10-PRI PM10 Primary (Filt + Cond)5.17989 0.16839 5.34827
PM10-FIL PM10 Filterable 0.49189 <.00001 0.49189
PM25-PRI PM2.5 Primary (Filt + Cond)2.83755 0.16334 3.00089
PM25-FIL PM2.5 Filterable 0.4711 <.00001 0.4711
PM-CON PM Condensible 0.9716 <.00001 0.9716
SO2 Sulfur Dioxide 0.31347 0.45881 0.77228
NOX Nitrogen Oxides 21.55122 6.60496 28.15618
VOC Volatile Organic Compounds 16.96909 0.71231 17.6814
CO Carbon Monoxide 12.59562 1.13135 13.72697
7439921 Lead 0.00008 <.00001 0.00008
NH3 Ammonia 0.52804 <.00001 0.52804

HAZARDOUS AIR POLLUTANT (HAP) and/or OTHER POLLUTANT EMISSIONS TOTALS
Pollutant Code/CAS #Pollutant Name Is VOC/PM? Total Emissions
(tons)*
7782505 Chlorine (HAP)- 0.001
7440473 Chromium (HAP)PM 0.12407
51285 2,4-Dinitrophenol (HAP)VOC 0.0108
106887 1,2-Epoxybutane (HAP)VOC 0.00004
171 Glycol Ethers (HAP)VOC 0.00957
822060 Hexamethylene Diisocyanate (HAP)VOC 0.0491
110543 Hexane (HAP)VOC 0.34113
7647010 Hydrochloric Acid (HAP)- 0.46729
108316 Maleic Anhydride (HAP)VOC 0.0077
101688 4,4`-Methylenediphenyl Diisocyanate (HAP)VOC 0.0188
108883 Toluene (HAP)VOC 0.73608
584849 2,4-Toluene Diisocyanate (HAP)VOC 0.0023
1330207 Xylenes (Mixed Isomers) (HAP)VOC 1.07873
N590 Polycyclic aromatic compounds (includes 25 specific compounds)
(HAP)- 0.00032
246 Polycyclic Organic Matter (HAP)VOC 0.012

*Rounded to 5 digits past the decimal point. Note that where rounding results in 0, <.00001 is indicated.
1/2
2/2

February 23, 2024

Bryce Bird, Director
Division of Air Quality
P.O. Box 144820
Salt Lake City, UT 84114-4820

Subject: Amendment to September 12, 2023 NOI Application:
Modification to Approval Order DAQE-AN104020059-22;
Notice of Intent Application – Project Prime

Dear Mr. Bird,
Northrop Grumman Systems Corporation (NGSC) Bacchus Works Facility is submitting this
letter to amend the Project Prime Notice of Intent (NOI) application submitted on September 12,
2023 requesting modifications to Approval Order DAQE-AN104020059-22.
Amendment Description
As requested by UDAQ, NGSC provided a breakout of hazardous air pollutant (HAP) emissions
in the Project Prime NOI application. The HAP allocations were estimated based on historical
emissions inventory data. To address concerns from UDAQ, NGSC performed a more thorough
review of materials and processes associated with two HAPs: hexamethylene-1,6-diisocyanate
(HDI) and chromium compounds. Based on that review, NGSC would like to amend NOI
Section 7.1 and Attachment 5: HAP Allocations, as described below.
Hexamethylene-1,6-diisocyanate (HDI)
NGSC would like to amend the HDI allocation listed in Attachment 5. NGSC would like to
allocate 0.95 tons per year (tpy) instead of 1.0 tpy.
Chromium Compounds
NGSC determined that chromium compound emissions were historically estimated using
conservative assumptions, which resulted in over-estimating emissions. NGSC established that
most chromium-containing materials are hand-applied at Bacchus, therefore not generating
chromium emissions. Only one location, Building 2457, generates chromium emissions by
applying a chromium-containing material using a spray gun in a spray booth. Based on these
emissions, NGSC would like to amend the chromium compounds allocation listed in Attachment
5 and allocate 0.1 tpy instead of 0.5 tpy.
NGSC asked Trinity Consultants to perform an emissions impact analysis for the chromium
emissions generated in Building 2457. The analysis is attached to this letter.
Summary of Changes
Based on the descriptions above, NGSC requests the following changes to Section 7.1 and
Attachment 5:

7.1. Proposed HAP Allocations
The current Bacchus Works AO limits the following in Condition II.B.2.a:
A. Combined HAPs to 24.90 tons per rolling 12-month period
B. Individual HAPs to 9.90 tons per rolling 12-month period
C. 2,4 toluene diisocyanate (TDI) to 0.98 tons per rolling 12-month period

UDAQ requested a breakout of HAP emissions, allocating limits to each reportable HAP, as
necessary. The accounting of source-wide HAPs includes a category for generic HAPs (1.99
tons per year) and individual HAPs (22.46 22.91 tons per year), for a site-wide total of 24.45
24.90 tons per year total HAPs. A table with the proposed HAP allocations is shown in
Attachment 5. The allocations include the potential HAPs from Project Prime.

Attachment 5: HAP Allocations – Revised

If you have any questions, please contact Allia Abdallah at [phone].
Sincerely,

Kris Blauer
Manager, Environmental Services

Enclosure

Cc: Jon Black
Tad Anderson

HEADQUARTERS
12700 Park Central Dr, Ste 2100, Dallas, TX 75251 / P 800.229.6655 / P 972.661.8100 / F 972.385.9203

VIA E-MAIL: [e-mail]

February 21, 2024

Ms. Allia Abdallah
Northrop Grumman Systems Corporation
Space Systems

RE: Dispersion Modeling Air Quality Analysis for Chromium Emissions from the Northrop Grumman Systems
Corporation’s Bacchus Facility Located in West Valley City, Utah

Dear Ms. Abdallah:

Trinity Consultants (Trinity) was retained by Northrop Grumman Systems Corporation (NGSC) to conduct an
air quality analysis for the Bacchus facility located in West Valley City, Utah. The air quality analysis was
conducted in support of a Notice of Intent (NOI) being submitted by NGSC proposing to install two emergency
generators, several small boilers and heaters, remove an emergency generator, and reduce natural gas usage.

Utah Administrative Code (UAC) R307-410-5 presents emission threshold values (ETVs) as a Hazardous Air
Pollutant (HAP)-specific threshold to determine if dispersion modeling will be required. The ETV is the product
of the threshold limit values (TLVs) listed in the American Conference of Governmental Industrial Hygienists
(ACGIH) “Threshold Limit Values for Chemical Substances and Physical Agents” handbook and an emission
threshold factor (defined in Table 2 of R307-410-5) which is based on the type of release point (vertically
restricted or vertically unrestricted) and the distance to ambient air. Net emission increases found to be greater
than the ETV are required to conduct a dispersion modeling analysis to be compared to applicable toxic
screening levels (TSLs).

During the HAPs modeling review, the Utah Department of Air Quality (UDAQ) requested additional
information for chromium (Cr) since the facility-wide emissions of Cr were above the ETV and the pollutant
had never been modeled before. NGSC is providing the following modeling analysis on a voluntary basis to
demonstrate that chromium emissions are in compliance with the 24-hour TSL. Modeling was conducted in
accordance with R307-410-3 and 40 CFR Part 51, Appendix W Guideline on Air Quality Models.
FACILITY LOCATION
The Northrop Grumman Bacchus Facility is located near West Valley City, Utah located in Salt Lake County.
The county is attainment for all criteria pollutants except for 1-hour PM2.5, sulfur dioxide, 8-hour ozone, and
maintenance for PM10. The facility is located on the western side of the Salt Lake Valley and is surrounded by
complex terrain. The foothills of the Oquirrh mountains are located 1.5 kilometers to the west of Building
2457. Universal Transverse Mercator (UTM) coordinates for Building 2457, in WGS84, are 406,084 meters
East and 4,502,235 meters North in Zone 12. Figure 1 presents a map of the facility.

Ms. Allia Abdallah - Page 2
February 21, 2024
1 NGSC Bacchus Facility Location

NEAR-FIELD DISPERSION MODELING ANALYSIS
This air quality impact analysis was performed in accordance with Utah Title R307-410. Emissions calculations
show the Facility emissions are over the modeling threshold for Cr.
Model Selection
Modeling was performed using the EPA-approved dispersion model AERMOD (Version 21112) which is an EPA
approved, steady-state Eulerian, Gaussian mathematical plume model. AERMOD is composed of three modular
components: AERMAP, the terrain preprocessor that characterizes the terrain and generates source and
receptor elevations; AERMET, the meteorological preprocessor processes raw surface and upper air
meteorological observations for use by AERMOD; and AERMOD, the control module and modeling processor.
Ms. Allia Abdallah - Page 3
February 21, 2024
Meteorological Data
Meteorological data utilized for this analysis consisted of five years of surface and upper-air data collected
from January 1, 2016 through December 31, 2020 collected by the National Weather Service (NWS) at the
Salt Lake City International Airport. Meteorological data were supplied by UDAQ for this analysis and were
processed using version 21112 of the meteorological preprocessor AERMET. Figure 2 presents the 5-year
(2016-2020) windrose for Salt Lake City, Utah.
Figure 2 Salt Lake City International Airport Windrose (2016-2020)

Receptor Grid
A modeling domain was developed for the near-field analyses to encompass the location of the maximum
modeled concentration from NGSC sources. Discrete receptor locations in AERMOD were based on UTM
coordinates in NAD83 datum.

The receptor grid was developed to ensure that maximum pollutant concentrations were determined by the
model. The grid consisted of 24,583 receptors with 25-meter spacing around the fence line, a 7 kilometer
(km) by 7 km box of 50-meter spaced receptors, as 12 km by 12 km box of 100-meter spaced receptors, and
a 20 km by 20 km box of 1 km spaced receptors. Figure 3 presents the receptor grid that was used in the
near-field analysis.
Ms. Allia Abdallah - Page 4
February 21, 2024
Figure 3 NGSC Bacchus Receptor Grid

Terrain Data
Source and receptor elevations were calculated using the AERMAP (version 18081) preprocessor. AERMAP
utilized 10-meter resolution National Elevation Data (NED) obtained from the U.S. Geological Survey (USGS).
Urban Roughness
The AERMOD model includes the option to specify if the source is located in an urban area. This option
modifies the dispersion for low-level emission sources to produce more realistic urban dispersion. 40 CFR Part
50 Appendix W provides two procedures to determine if rural or urban dispersion coefficients should be used
for a source, land use classification and population density. The first procedure is based on land use
classification. If the land use types I1, I2, C1, R2, and R3 account for 50 percent or more of the area within
a three-kilometer area surrounding the source, the urban option in AERMOD will be considered appropriate
for dispersion modeling. The second procedure to determine urban option appropriateness requires a
population density within the three-kilometer radius to be greater than 750 people per square kilometer.
Ms. Allia Abdallah - Page 5
February 21, 2024
Population data from 2020 Census were obtained from the Utah Geospatial Reference Center1 (AGRC) to
evaluate the population surrounding the NGSC Bacchus facility. Figure 4 presents a map showing the boundary
of the NGSC Bacchus facility, the three-kilometer area surrounding the facility and the selected Census blocks
used in the analysis. The area is approximately 123.4 square kilometers with an estimated population of
267,015 persons resulting in 2,163 persons per square kilometer, which exceeds 750 people per square
kilometer. The URBANOPT population was set for the Salt Lake City MSA at 1,186,257 persons.
Figure 4 NGSC Bacchus- Population Density Analysis

1 Utah Geospatial Reference Center, 2020 Census Block Demographic Data, Accessed September 2023.
https://gis.utah.gov/data/demographic/census/
Ms. Allia Abdallah - Page 6
February 21, 2024
Building Downwash
The Building Profile Input Program BPIP with Plume Rise Model Enhancements (PRIME) (Version 04274) was
utilized to address downwash effects. The height, width, length, and base elevation of structures associated
with the Project or structures already in existence at the Northrop Grumman Bacchus facility were input to
BPIP-Prime to determine in each of the 36 wind directions (10-degree sectors) which buildings will produce
the greatest downwash effects for each stack.
Technical Input Options and Source Parameters
EPA recommends various default options to be used in dispersion modeling for regulatory purposes. The
recommended regulatory default options that were used for the modeling analyses are as follows:

► Stack-tip downwash,
► Calms and missing meteorological data routine,
► Actual receptor elevations,
► Sequential date checking, and
► Simple and complex elevated terrain algorithms.

Other selected output variables to be used in AERMOD include:

► 24-hour averaging period for Cr,
► Urban mixing heights.

Stack parameters and a Cr Potential to Emit (PTE) emission rate of 0.016 lb/hr for the facility were provided
by NGSC to be included in the AERMOD modeling system to address the near-field impacts. The short-term
emission estimate rate and source parameters including UTM coordinates, stack base elevations, and source
release parameters for each modeled point source at the NGSC facility are presented in Attachment A.
Dispersion Modeling Results
Dispersion modeling was conducted for chromium emissions. Table 1 compares the maximum model-predicted
concentration to the TSL for chromium, which was obtained from UDAQ’s 2011 ACGIH Excel Spreadsheet. As
can be seen in Table 1, chromium was below its respective TSL. A model concentration isopleth plot is
presented in Figure 5; AERMOD output summaries are provided in Attachment B.
Table 1 HAP Analysis Results
Pollutant
Averaging
Period
Model-Predicted
Concentration
(µg/m3)
TSL
(µg/m3)
Percent of
TSL
Chromium 24-hour 0.01377 0.11 12.5%
.
Ms. Allia Abdallah - Page 7
February 21, 2024
Figure 5 Concentration Isopleth Plot for 24-hour Cr

SUMMARY AND CONCLUSION
Trinity conducted a dispersion modeling analysis to demonstrate that the requested changes at the Northrop
Grumman Bacchus facility located near West Valley City, Utah will not pose an unacceptable risk to public
health. The air quality analysis showed the Northrop Grumman facility is below the Toxic Screening Level for
chromium as defined in R307-410-5 of the Utah Code.

If you have any questions or comments regarding the information presented in this letter, please do not
hesitate to call me at [phone] ext. 302.

Sincerely,
TRINITY
Scott Adamson, CCM
Managing Consultant/Meteorologist

ATTACHMENT A
AERMOD Input Data

AERMOD Model Options
Model Options
Pathway Keyword Description Value
CO TITLEONE Project title 1 Northrop Grumman Bacchus
CO TITLETWO Project title 2 Cr Modeling/ Added URBANOPT
CO MODELOPT Model options CONC,NODRYDPLT,NOWETDPLT
CO AVERTIME Averaging times 1,24
CO URBANOPT Urban options Table(5,2) / /item /ID /URB1 /POPULATION /1186257 /NAME /SALTLAKE
/ROUGHNESS /1
CO POLLUTID Pollutant ID CR
CO HALFLIFE Half life
CO DCAYCOEF Decay coefficient
CO FLAGPOLE Flagpole receptor heights
CO RUNORNOT Run or Not RUN
CO EVENTFIL Event file F
CO SAVEFILE Save file F
CO INITFILE Initialization file
CO MULTYEAR Multiple year option N/A
CO DEBUGOPT Debug options N/A
CO ERRORFIL Error file F
SO ELEVUNIT Elevation units METERS
SO EMISUNIT Emission units N/A
RE ELEVUNIT Elevation units METERS
ME SURFFILE Surface met file C:\Users\sadamson\ONEDRI~1\NORTHR~1\Bacchus\2024-0~1\KSLC_2016-2020.SFC
ME PROFFILE Profile met file C:\Users\sadamson\ONEDRI~1\NORTHR~1\Bacchus\2024-0~1\KSLC_2016-2020.PFL
ME SURFDATA Surf met data info. 24127 2016 SALT
ME UAIRDATA U-Air met data info. 24127 2016 SALT
ME SITEDATA On-site met data info.
ME PROFBASE Elev. above MSL 1288.4
ME STARTEND Start-end met dates
ME WDROTATE Wind dir. rot. adjust.
ME WINDCATS Wind speed cat. max.
ME SCIMBYHR SCIM sample params
EV DAYTABLE Print summary opt. N/A
OU EVENTOUT Output info. level N/A
OU DAYTABLE Print summary opt.

Source Parameter Tables
All Sources
Source ID /
Pollutant ID Source Type Description UTM Elev.
Emiss. Rate Emiss.
Units
Release
Height
East (m)North (m)(m)(m)
2457FIN6 POINT Spray Gun - BLDG2457 406084.15 4502235.1 1581.811 0.002015966 (g/s) 7.9248
Point Sources
Source ID /
Pollutant ID Description UTM Elev. Emiss. Rate Stack
Height
Stack
Temp Stack
Velocity Stack
Diameter
East (m) North (m)(m)(g/s)(m)(K) (m/s) (m)
2457FIN6 Spray Gun - BLDG2457 406084.15 4502235.1 1581.811 0.002015966 7.9248 294.2611 11.93771 1.249172

ATTACHMENT B
AERMOD Summary Output

NORTHROP1
GRUMMAN I
Northrop Grumman Systems Corporation
5000 South 8400 W
West Valley City, UT 84044
ngc.com
September 11, 2023
Bryce C. Bird, Director
Utah Department of Environmental Quality
Division of Air Quality
P.O. Box 144820
Salt Lake City, Utah 84114-4820
Re: Modification to Approval Order DAQE-AN104020059-22;
Notice of Intent Application - Project Prime
Dear Mr. Bird:
Northrop Grumman Systems Corporation (NGSC) is submitting this Notice of Intent (NOI) for
a proposed project at the Bacchus Works facility in West Valley City, Utah.
The proposed project (Project Prime) includes new buildings and equipment to support
increased rocket motor manufacturing. Many of the new buildings are replicas of existing
buildings and operations.
NGSC requests that Approval Order(AO) DAQE-AN104020059-22 be modified to reflect the
information in this NOl.
If there are any questions, please contact Allia Abdallah at [phone].
Sincerely,
Kris Blauer
Manager, Environmental Services
Northrop Grumman Systems Corporation
Enclosures
cc: Tad Anderson
Form 1 Date __________________
Notice of Intent (NOI) Application Checklist
3URMHFW __________________Utah Division of Air Quality
New Source Review Section
Source Identification Information [R307-401-5]
1. Company name, mailing address, physical address and telephone number †
2. Company contact (Name, mailing address, and telephone number)†
3. Name and contact of person submitting NOI application (if different than 2)†
4. Source Universal Transverse Mercator (UTM) coordinates †
5. Source Standard Industrial Classification (SIC) code †
6. Area designation (attainment, maintenance, or nonattainment)†
7. Federal/State requirement applicability (NAAQS, NSPS, MACT, SIP, etc.)†
8. Source size determination (Major, Minor, PSD)†
9. Current Approval Order(s) and/or Title V Permit numbers †
NOI Application Information:[R307-401]
†
†
†
†
†
†
†
†
†
†
†N/A †
†N/A †
A. Air quality analysis (air model, met data, background data, source impact analysis) †N/A †
Detailed description of the project and source process
Discussion of fuels, raw materials, and products consumed/produced
Description of equipment used in the process and operating schedule
Description of changes to the process, production rates, etc.
Site plan of source with building dimensions, stack parameters, etc.
Best Available Control Technology (BACT) Analysis [R307-401-8]
$BACT analysis for all new and modified equipment
Emissions Related Information: [R307-401-2(b)]
$Emission calculations for each new/modified unit and site-wide
(Include PM10, PM2.5,NOx, SO2, CO, VOCs, HAPs, and GHGs)
%References/assumptions, SDS, for each calculation and pollutant
&All speciated HAP emissions (list in lbs/hr)
Emissions Impact Analysis – Approved Modeling Protocol [R307-410]0DOHLFDQK\GULGH
$Composition and physical characteristics of effluent
(emission rates, temperature, volume, pollutant types and concentrations)
Nonattainment/Maintenance Areas – Major NSR/Minor (offsetting only) [R307-403]
$NAAQS demonstration, Lowest Achievable Emission Rate, Offset requirements
%Alternative site analysis, Major source ownership compliance certification
Major Sources in Attainment or Unclassified Areas (PSD) [R307-405, R307-406]
%Visibility impact analysis, Class I area impact
6LJQDWXUHRQ$SSOLFDWLRQ
†N/A †
Note: The Division of Air Quality will not accept documents containing confidential information or data.
Documents containing confidential information will be returned to the Source submitting the application.
Company __________________
09/11/2023
Northrop Grumman Systems
Corporation
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
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✔
Project Prime
o £NV, (4
AIR QUALITY
Form 2
Company Information/Notice of Intent (NOI)
Utah Division of Air Quality
New Source Review Section
Date 09/11/2023
Application for: Initial Approval Order Approval Order Modification
General Owner and Source Information
1 Company name and mailing address: 2. Company** contact for environmental matters:
Northrop Grumman Systems Corporation Kris Blauer
M/S F/1/EV; P.O. Box 98 Phone no.: ([phone]
Magna, UT 84044-0098 Email:K ris.Blauerngc.com
Phone No.: 80'O) 251-2166
Fax No ( \ ** Company contact only; consultant or independent contractor contact
/ information can be provided in a cover letter
3. Source name and physical address (if different from 4. Source Property Universal Transverse Mercator
above): coordinates (UTM), including System and Datum:
Northrop Grumman Syste Bacchus Works - Plant I NIROP Bacchus West UTM" 12
5000 S. 8400 W.
X: 409,700 m
Magna, UT 84044
Phone no.: ((80) 251-2166 Y: 4,502,100 m
Fax no.:
5. The Source is located in:S alt Lake County
______________________________________
6. Standard Industrial Classification Code (SIC)
a7BL ______________________
7. If request for modification, AO# to be modified: DAQE #Nb0402005922 DATED:
8. Brief (50 words or less) description of process.
The proposed project (Project Prime) includes new manufacturing buildings to accommodate
increased rocket motor production. Many of the new buildings are replicas of existing buildings and
operations. The proposed project is located within the existing Bacchus Works site in West Valley
City.
Electronic NOI
9. A complete and accurate electronic NOI submitted to DAQ Permitting Mangers Jon Black (jlblack©utah.gov) or Alan
Humpherys (ahumpherysutah.gov) can expedite review process. Please mark application type.
Hard Copy Submittal Electronic Copy Submittal BothIJ
Authorization/Signature
I hereby certify that the information and data submitted in and with this application is completely true, accurate and
complete, based on r asonable inquiry made by me and to the best of my knowledge and belief.
Signature:, Title: Manager, Environmental Services
Telephone Number: Date:
Kris Blauer ((80)) 251-2166
Email: / /
_________________________________________ Kris.BJauerngc.com ___________________
1 of 1
Page 1 of 1
Form 4 Company____________________________
Project Information Site ______________________________
Utah Division of Air Quality
New Source Review Section
Process Data -For Modification/Amendment ONLY
1. Permit Number_______________________________
If submitting a new permit, then use Form 3
Requested Changes
2. Name of process to be modified/added:
_______________________________
End product of this process:
_______________________________
3. Permit Change Type: New Increase*
Equipment
Process
Condition Change ____________________
Other ______________________________
Other ______________________________
Other ______________________________
4. Does new emission unit affect existing
permitted process limits?
Yes No
5. Condition(s) Changing:
6. Description of Permit/Process Change**
7. New or modified materials and quantities used in process. **
Material Quantity Annually
8. New or modified process emitting units **
Emitting Unit(s)Capacity(s)Manufacture Date(s)
*If the permit being modified does not include CO2e or PM2.5, the emissions need to be calculated and submitted to DAQ, which may result in an
emissions increase and a public comment period.
**If additional space is required, please generate a document to accommodate and attach to form.
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
DAQE-AN104020059-22
See application text.
See application text.
✔
✔
✔
See application text.
See application text for detailed description of changes.
See application text.
See application text.

September 11, 2023

Owner: Northrop Grumman Systems Corporation
Facility: Bacchus Works – Plant 1 / NIROP / Bacchus West
Approval Order: DAQE-AN104020059-22
Contact: Allia Abdallah (801-251-2221)

Notice of Intent Application
Project Prime

Notice of Intent Application
Project Prime
Site: Bacchus Works

Table of Contents
UDAQ Forms
1. Background Information ................................................................................................. 1 
1.1. Facility Description .................................................................................................. 1 
1.2. Classification ........................................................................................................... 1 
1.3. Applicable Federal Standards ................................................................................. 1 
2. Project Information ......................................................................................................... 2 
2.1. Project Description .................................................................................................. 2 
2.2. Project Equipment List ............................................................................................ 2 
2.2.1. New Equipment ............................................................................................... 2 
2.2.2. Removed Equipment ....................................................................................... 3 
2.3. Process Changes .................................................................................................... 3 
2.4. Modifications to Approval Order Conditions ............................................................ 3 
3. Building Descriptions ...................................................................................................... 5 
3.1.1. Cast and Cure Complex .................................................................................. 5 
3.1.2. Mix Bowl Cleaning 4 ........................................................................................ 5 
3.1.3. Finishing 8 ....................................................................................................... 5 
3.1.4. Shipping 6 ........................................................................................................ 5 
3.1.5. Pre-Batch Storage Building (Building 2603) .................................................... 6 
3.1.6. Pre-Mix Process (Building 10A) ....................................................................... 6 
3.1.7. Building 17A ..................................................................................................... 6 
4. Emissions Summary for New Sources ........................................................................... 7 
4.1. Potential To Emit (PTE) Emissions ......................................................................... 7 
4.2. Emissions Methodology .......................................................................................... 8 
4.2.1. Emergency Generators .................................................................................... 8 
4.2.2. Natural Gas-Fired Equipment .......................................................................... 8 
4.2.3. Material Use ..................................................................................................... 9 
4.2.4. Mix Bowl Cleaning 4 ........................................................................................ 9 
4.2.5. Fume Hoods .................................................................................................... 9 
4.2.6. Pre-Mix Process ............................................................................................ 10 
4.2.7. Fiberglass Cutting .......................................................................................... 10 
5. Best Available Control Technology (BACT) Analysis ................................................... 11 
5.1. Top-Down Analysis Process ................................................................................. 11 
5.2. Emission Control Descriptions .............................................................................. 12 
5.2.1. Fuel Combustion Control Descriptions .......................................................... 12 

5.2.2. VOC / HAP Control Descriptions ................................................................... 13 
5.2.3. Particulate Control Descriptions .................................................................... 15 
5.3. BACT Evaluation ................................................................................................... 15 
5.3.1. Emergency Generators .................................................................................. 15 
5.3.2. Natural Gas-Fired Boilers (< 2.0 MMBtu/hr) .................................................. 17 
5.3.3. Natural Gas-Fired Heaters and AHU (≤ 0.10 MMBtu/hr) ............................... 17 
5.3.4. Material Use – CCC and Finishing 8 ............................................................. 18 
5.3.5. Mix Bowl Cleaning ......................................................................................... 20 
5.3.6. Fume Hoods .................................................................................................. 24 
5.3.7. Pre-Mix Process ............................................................................................ 25 
5.3.8. Fiberglass Cutting .......................................................................................... 27 
6. Regulatory Analysis ..................................................................................................... 29 
6.1. Federal Regulations .............................................................................................. 29 
6.1.1. Applicable Regulations .................................................................................. 29 
6.1.2. Non-Applicable Regulations .......................................................................... 30 
6.2. Serious Ozone Nonattainment Evaluation ............................................................ 30 
7. HAP Evaluations .......................................................................................................... 31 
7.1. Proposed HAP Allocations .................................................................................... 31 
7.2. Project Prime HAPs Screening ............................................................................. 31 
8. Emissions Impact Analysis ........................................................................................... 32 
9. References ................................................................................................................... 33 

Notice of Intent Application
Project Prime
Site: Bacchus Works

Table of Tables

Table 1. PTE Summary ......................................................................................................... 8 
Table 2. Proposed BACT Summary .................................................................................... 11 
Table 3. Emergency Generators Emissions Summary ....................................................... 15 
Table 4. Natural Gas-Fired Boilers Emissions Summary .................................................... 17 
Table 5. Natural Gas-Fired Heaters and AHU Emissions Summary ................................... 17 
Table 6. Material Use Emissions Summary ........................................................................ 18 
Table 7. Mix Bowl Cleaning Emissions Summary ............................................................... 20 
Table 8. Cost Effectiveness per Ton: Catalytic Oxidizer ..................................................... 22 
Table 9. Cost Effectiveness per Ton: Carbon Adsorption System ...................................... 23 
Table 10. Fume Hoods Emissions Summary ...................................................................... 24 
Table 11. Pre-Mix Process Emissions Summary ................................................................ 25 
Table 12. Fiberglass Cutting Emissions Summary .............................................................. 27 
Table 13. Specifications for Fiberglass Cutting Control Equipment .................................... 27 

List of Attachments
Attachment 1: Site Plan 
Attachment 2: UDAQ Process Information Forms 
Attachment 3: Emission Calculations 
Attachment 4: BACT Calculations 
Attachment 5: HAP Allocations 
Attachment 6: Air Quality Impact Analysis – Maleic Anhydride 

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 1 of 33

1. Background Information
1.1. Facility Description
Northrop Grumman Systems Corporation (NGSC) operates the Bacchus Works site, an existing
rocket propulsion plant in West Valley City. The Bacchus Works site manufactures solid fuel
rocket motors for NASA and the Department of Defense. The manufacturing operations at this
plant include rocket case preparation buildings, cyclotetramethylene tetranitramine (HMX)
grinding and drying processes for making solid rocket fuel, propellant sampling and machining,
and an open burning ground for the routine burning of explosive and flammable wastes. The site
is divided in three sections: Plant 1, NIROP, and Bacchus West. A facility site plan is included in
Attachment 1.
1.2. Classification
NSR Classification
Minor Modification at Minor Source

Source Classification
Located in: Salt Lake County
Northern Wasatch Front O3 NAA
Salt Lake City UT PM2.5 NAA
Salt Lake County SO2 NAA
Airs Source Size: SM
1.3. Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), Dc: Standards of Performance for Small Industrial-Commercial-Institutional
Steam Generating Units
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: NESHAP for Stationary Reciprocating Internal Combustion Engines
MACT (Part 63), CCCCCC: NESHAP for Source Category: Gasoline Dispensing Facilities
Title V (Part 70), Area Source

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 2 of 33

2. Project Information
2.1. Project Description
The proposed project (Project Prime) includes new buildings and equipment to support increased
rocket motor manufacturing. Many of the new buildings are replicas of existing buildings and
operations. The proposed project is located within the existing Bacchus Works site in West Valley
City.

NGSC requests approval to install the new equipment and processes listed in this Notice of Intent
(NOI) application.
2.2. Project Equipment List
2.2.1. New Equipment
Below is a list of the proposed new equipment. UDAQ process information forms are included in
Attachment 2. A brief description of each building is included in Section 0.

 Cast and Cure Complex (CCC) – Cast Cure 3 and Cast Cure 4
o Three (3) natural gas-fired low NOx boilers with flue-gas recirculation (FGR), each
rated at 1.70 MMBtu/hr
o Two (2) natural gas-fired low NOx boilers, each rated at 0.50 MMBtu/hr
o Two (2) natural gas-fired unit heaters, each rated at 0.03 MMBtu/hr
o One (1) natural gas-fired air-handling unit, rated at 0.04 MMBtu/hr
o One (1) 4309 horsepower (hp) diesel emergency generator
o Materials containing VOCs and/or HAPs

 Mix Bowl Cleaning 4 (MBC4)
o Two (2) natural gas-fired low NOx boilers with FGR, each rated at 1.70 MMBtu/hr
o Two (2) natural gas-fired heaters, each rated at 0.03 MMBtu/hr
o One (1) 755 hp diesel emergency generator
o One (1) fume hood for hand-wiping parts
o Cleaning material containing VOCs

 Finishing 8 Building (FIN8)
o Two (2) natural gas-fired low NOx boilers with FGR, each rated at 1.36 MMBtu/hr
o Two (2) fume hoods for mixing materials
o Materials containing VOCs and/or HAPs

 Shipping 6 Building (SHIP6)
o Two (2) natural gas-fired low NOx boilers with FGR, each rated at 1.36 MMBtu/hr

 Pre-Batch Storage Building (2603)
o Two (2) natural gas-fired low NOx boilers, each rated at 0.399 MMBtu/hr

 Building 17A – Fiberglass Cutting
o Band Saw
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 3 of 33

 One (1) Craftsman Bandsaw; Model 119.224010 – 1 hp
o Router Table
 Two (2) Porter Cable Routers; Model 8902 – 2 hp
 Two (2) Dewalt Routers; Model DW610 – 1.5 hp
o One (1) vacuum filtration system
2.2.2. Removed Equipment
The following equipment will be removed:

 Building 8504 - Boilerhouse
o 42 MMBtu/hr natural gas-fired low NOx boiler with FGR (Condition II.A.8)

 Building 2471 – Case Preparation
o Spray lance robot booth: SLR-4 (Condition II.A.6.D)
2.3. Process Changes
The following existing processes will increase throughput:

 Pre-Mix Process (Building 10A)
o No new equipment will be installed
2.4. Modifications to Approval Order Conditions
Natural Gas Consumption Limit
NGSC is requesting a decrease in the site-wide natural gas limit in Approval Order
Condition II.B.3.b. The current natural gas consumption limit is 733,000 MMBtu per 12-
month period and NGSC would like to reduce this limit by 100,000 MMBtu, to a new limit
of 633,000 MMBtu per 12-month period.

The new condition would read:

The owner/operator shall not exceed a total natural gas consumption limit of
633,000 MMBtu per 12-month period for all natural gas-fired equipment on site.
Building 2471 VOC Limit
NGSC is requesting a decrease in the Building 2471 (Case Preparation) VOC limit in
Approval Order Condition II.B.8.a. The current condition limits VOC emissions to 16.0 tons
per 12-month rolling period for all operations in Building 2471. Due to throughput
expectations in this building, NGSC is requesting a decrease of 2.0 tons of VOCs, to a
new limit of 14.0 tons of VOCs per 12-month rolling period in Building 2471.

The new condition would read:

The owner/operator shall not exceed 14.0 tons of VOC emissions per rolling 12-
month period for all operations in Building 2471.
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 4 of 33

Emergency Generator Location
NGSC requests that the location for the 755 hp “8501 Plt. #1 Powerhouse” diesel-fired
emergency generator be updated (Condition II.A.9). The generator will be moved from
Building 8501 to an adjacent building, Building 8608. This is not a new piece of equipment.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 5 of 33

3. Building Descriptions
See Attachment 1 for approximate building locations.
3.1.1. Cast and Cure Complex
The Cast and Cure Complex (CCC) will contain Cast Cure 3 (CC3) and Cast Cure 4 (CC4)
buildings, as well as a utility building and control house. The CCC will be similar to existing Cast
Cure 1 and Cast Cure 2 buildings.

Cast cure buildings are used for the cast, cure, and disassembly of rocket motors. The CC3 and
CC4 will be large facilities with casting pits where motors are cast and cured with rocket motor
propellant. Mix bowls will be brought in through the existing tramway and propellant will be cast
into the motor. The propellant is contained throughout this process. Once the motors have cured,
they are transferred out of the complex.

Building Numbers:
 CC3 – 2617
 CC4 – 2618
 CCC Utility Building – 2619
 CCC Control House – 2600
3.1.2. Mix Bowl Cleaning 4
The Mix Bowl Cleaning 4 (MBC4) building will be similar to the existing Mix Bowl Cleaning 3
building. The MBC4 building will be used to clean mixing bowls following casting and to remove
cured propellant from cast tooling. The mix bowls are cleaned using a mix bowl cleaning robot
and smaller tools are hand-wiped in a fume hood. There will also be a utility building associated
with MBC4.

Building Numbers:
 MBC4 – 2609
 MBC4 Utility Building – 2610
3.1.3. Finishing 8
The Finishing 8 (FIN8) building will be similar to the existing Finishing 3 building. Loaded motors
are brought to the finishing area where nozzles are attached and final finishes are hand-applied,
including paint and sealant.

Building Number:
 FIN8 – 2613
3.1.4. Shipping 6
The Shipping 6 (SHIP6) building is similar to existing shipping buildings, where finished motors
are stored prior to shipping. Natural gas-fired boilers are the only emissions-emitting equipment
in this building.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 6 of 33

Building Number:
 SHIP6 – 2611
3.1.5. Pre-Batch Storage Building (Building 2603)
The Pre-Batch Storage Building (2603) is simply a location to hold materials prior to use. The
boilers at Building 2603 will replace two existing boilers (each rated 0.417 MMBtu/hr) in an old
Utility Building (2486). The old boilers in Building 2486 are not listed in the current Approval Order
due to their small size.
3.1.6. Pre-Mix Process (Building 10A)
Building 10A is an existing building on NIROP where the pre-mix process occurs. The pre-mix
process is a batch process where solid maleic anhydride (HAP) briquettes are added to a non-
volatile liquid in a sealed reactor. The reactor is heated and sparged to evenly mix the maleic
anhydride. During mixing, a small amount of maleic anhydride partitions into the vapor phase and
is emitted with the sparged air. No new equipment will be installed in this building, but there will
be an increase in production to meet the motor demand.
3.1.7. Building 17A
Building 17A is an existing building on NIROP that will be used for a new fiberglass cutting
process.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 7 of 33

4. Emissions Summary for New Sources
4.1. Potential To Emit (PTE) Emissions
NGSC requests to update the site’s potential to emit (PTE) emissions to reflect the information in
this NOI application. Emission calculations are included in Attachment 3 and the existing PTE,
the change in PTE, and the new facility PTE emissions are shown in Table 1. The total HAP PTE
will remain at 24.90 tons per year, but the HAPs are now allocated appropriately and discussed
in Section 0:
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 8 of 33

HAP Evaluations
Proposed HAP Allocation.
Table 1. PTE Summary
Pollutant

Existing PTE1
(tpy)
Change in PTE
(tpy)
New PTE
(tpy)
PM10 51.67 -0.35 51.32
PM2.5 51.60 -0.35 51.25
NOx 52.99 -3.35 49.64
SO2 0.68 -0.08 0.60
CO 33.80 -6.02 27.78
VOCs 45.53 3.24 48.77
CO2e 43,094 -10,330 32,764
Total HAPs2 24.90 -- 24.90
Notes:
1 Existing PTE based on the values in DAQE-AN104020059-22
2 Project Prime HAPs will be rolled into the existing total HAP limit of 24.90 tons per rolling 12-month period
(Condition II.B.2.a). See Section 0 of this application for allocated HAP information.
tpy = tons per year
4.2. Emissions Methodology
A summary of the emissions methodology for each emission type is described below. Individual
calculations, including inputs and equations, are included in Attachment 3.
4.2.1. Emergency Generators
Emergency generator emissions were calculated using EPA Tier 2 standards for Nonroad
Compression-Ignition Engines. A California Air Resources Board (CARB) emission factors policy
memo was used to determine the breakdown of the non-methane hydrocarbon (NMHC) + NOx
emission factor, which is assumed to be 5% NMHC and 95% NOx (CARB, 2008). The SO2
emissions were calculated using the ultra-low sulfur diesel (ULSD) sulfur content (15 ppm). HAP
emissions were estimated using EPA AP-42 Chapter 3.4 emission factors for large stationary
diesel engines. Greenhouse gas emissions were estimated using 40 CFR Subpart C. Emissions
are based on 100 hours per year for maintenance and non-emergency run time.
4.2.2. Natural Gas-Fired Equipment
Natural gas-fired equipment emissions were calculated using EPA AP-42 Chapter 1.4 emission
factors. The boiler NOx emissions were estimated using a low NOx burner emission factor of 30
parts per million (ppm). The small heaters and air handling unit (AHU) NOx emissions were
estimated using the AP-42 Chapter 1.4 small, uncontrolled boiler NOx emission factor of 100
pounds per million standard cubic feet (lb/MMscf). Greenhouse gas emissions were estimated
using 40 CFR Subpart C.
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 9 of 33

4.2.3. Material Use
Cast Cure Complex (CCC)
The CCC emissions were estimated using the annual quantity, specific gravity, and
percent VOC or percent HAP, as specificized in each material’s Safety Data Sheet (SDS).
NGSC assumed all emissions exit the building.
Finishing 8
All materials in FIN8 are hand-applied. Except for a material containing 4,4'-
methylenediphenyl diisocyanate (MDI), NGSC conservatively assumed all emissions exit
the building. Emissions were estimated using the annual quantity, specific gravity, and
percent VOC or percent HAP, as specified in each material’s SDS.

For the material (Part S213253-002) containing MDI, NGSC considered the crosslinking
reaction of MDI with polyols. When isocyanates, like MDI, are combined with other
compounds containing polyols, they react and form a polyurethane product, greatly
reducing the amount of MDI emitted. Due to its high reactivity, MDI emissions were
estimated using the American Chemistry Council (ACC) document MDI Emissions
Reporting Guidelines for the Polyurethane Industry (ACC, 2012). Though this material is
applied in beads using a tool similar to a caulk gun, NGSC conservatively utilized the ACC
emissions methodology for rolling material on a surface. This approach utilizes the partial
pressure of MDI, the material’s tack-free time, process temperature, and the exposed area
to estimate an evaporation rate. This same material also contains polymeric MDI, or PMDI,
as described by the ACC. The reaction of 4,4’ MDI and PMDI are very similar, and
therefore the PMDI emissions were estimated similar to the MDI emissions. Detailed
inputs and calculations are shown in Attachment 3.
4.2.4. Mix Bowl Cleaning 4
The automated mix bowl cleaning process is unique, but the overall design is similar to a simple
spray sink cold cleaner degreaser, as described in AP-42 Chapter 4.6 for solvent degreasing. The
solvent used to clean the mix bowls does not contain any HAPs. The cleaning emissions
calculation uses the surface area of the mixing bowls, the time the cleaning solvent is in the bowl,
and cold cleaner emission factor of 0.08 lb/hr/ft2.
4.2.5. Fume Hoods
Fume Hoods – Material Mixing in FIN8
The fume hoods in FIN8 are used to minimize worker exposure to the vapors while
prepping materials prior to use. The emissions from these are expected to be minimal.
Fume hood emission factors were derived from the surface evaporation described in the
Preferred and Alternative Methods for Estimating Air Emissions from Paint, Ink and Other
Coating Manufacturing Facilities (EPA, 2005). The evaporation rate is dependent on the
surface area of the container. The materials are typically mixed in small containers,
however the diameter of a 1-gallon paint can was used as a worst-case scenario. The
mixing, when the container lid is open, typically takes no longer than 15 minutes. NGSC
used a typical fume hood face velocity of 100 feet per second (ft/s), with lower velocities
throughout the rest of the hood’s working space. A worst-case material containing MDI
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was used to estimate emissions. See the emission calculations in Attachment 3 for a
complete list of input parameters.
Fume Hood – Hand-Wiped Parts in MBC4
Small parts or tools used in the mix bowl cleaning process may be hand-wiped in the fume
hood. Similar to the fume hoods in FIN8, the fume hood in MBC4 is used to minimize
worker exposure to the vapors while hand-wiping parts. Fume hood emissions were
derived from the surface evaporation described in the Preferred and Alternative Methods
for Estimating Air Emissions from Paint, Ink and Other Coating Manufacturing Facilities
(EPA, 2005). In this case, the evaporation rate used the molecular weight of the cleaning
solvent, the surface area of the fume hood, a fume hood velocity of 100 ft/s, and a batch
cleaning time of 45 minutes per mix bowl cleaned. See the emission calculations in
Attachment 3 for a complete list of input parameters.
4.2.6. Pre-Mix Process
Pre-mix process emissions were estimated using a mass balance. The material is weighed and
analyzed before and after the maleic anhydride is added and mixed, and the average difference
of 1.1 lbs of maleic anhydride per batch is assumed to be emitted.
4.2.7. Fiberglass Cutting
Particulate emissions generated during fiberglass cutting were estimated using a baseline
emission factor of 0.016 grains per dry standard cubic foot (gr/dscf). The emission factor appears
to be suitable for filtration efficiencies between MERV 8 and 11, where approximately 70 to 80%
of particles between 3 and 10 µm are effectively controlled, as described in the American Society
of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE), Standard 52.2 (ASHRAE,
2017). The PM2.5 fraction exhausted is assumed to be 85% of the PM10 emission rate. Therefore,
the baseline PM2.5 emission factor is 0.0136 gr/dscf.

The specifications for an ASHRAE 52.2 MERV 11 filter were used to calculate the efficiency
increase to a MERV 15 filter. The difference between the particle capture efficiency of the MERV
11 and MERV 15 filter was used to calculate the emission rate for the smallest size fraction (0.3
to 1 µm). The increased efficiency was multiplied by the MERV 11 emission rate to derive the new
emission factor for the MERV 15 filter. The calculated emission factor for the smallest size fraction
was applied to PM2.5. The lowest overall emission factor was used for PM10 since MERV 15 filters
are highly effective for particles in the upper size range. A table with calculations is shown in
Attachment 3.

The fiberglass fabric will occasionally have an adhesive applied to the surface. The two-part
adhesive has a small amount of toluene, so VOC and HAPs emissions were estimated using the
estimated annual adhesive quantity.

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5. Best Available Control Technology (BACT) Analysis
5.1. Top-Down Analysis Process
A top-down BACT evaluation requires documentation and ranking of performance levels
achievable for each technically feasible pollutant control technology. The top-down BACT review
process involves determining the most stringent control technique available for a similar or
identical emission source. If it can be shown that the control technology is technically,
environmentally, or economically impractical on a case-by-case basis for the source under
evaluation, then the next most stringent level of control is determined and similarly evaluated.

This process continues until a control technology and associated emission level is determined
that cannot be eliminated by any technical, environmental, or economic objections. The five steps
involved in a top-down BACT evaluation are:

1. Identify available control options with practical potential for application to the specific
emission unit for the regulated pollutant under evaluation. The EPA’s RACT/BACT/LAER
Clearinghouse (RBLC) database is used to help identify appropriate controls;
2. Eliminate technically infeasible technology options;
3. Rank remaining control technologies by control effectiveness;
4. Evaluate the most effective control alternative and document results; if the top option is
not selected as BACT, evaluate the next most effective control option; and
5. Select BACT, which will be the most effective practical option not rejected based on
energy, environmental, or economic impacts (in that order).

A top-down approach was used in this BACT analysis to evaluate available pollution controls for
the proposed project. The BACT analysis is grouped by equipment type and then pollutant. A
summary of the proposed BACT is shown in Table 2.

Table 2. Proposed BACT Summary
Equipment / Process Building(s) Pollutant Proposed BACT
Emergency Generators  CCC
 MBC4
NOx / PM2.5 / PM10
/ VOCs / CO EPA-rated Tier 2 engine
SO2 Use of ULSD (15 ppm S)
Natural Gas-Fired
Boilers

< 2.0 MMBtu/hr

 CCC
 MBC4
 SHIP6
 FIN8
 Pre-Batch Storage
NOx / PM2.5 / PM10
/ VOCs / CO / SO2
Low NOx burner, 30 ppm
NOx;

Good combustion practices
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Equipment / Process Building(s) Pollutant Proposed BACT

Natural Gas-Fired
Heaters and AHU

< 0.05 MMBtu/hr

 CCC
 MBC4
NOx / PM2.5 / PM10
/ VOCs / CO / SO2 Good combustion practices
Material Use  CCC
 FIN8 VOCs / HAPs Best work practices, including
closed containers
Mix Bowl Cleaning  MBC4 VOCs Best work practices, including
closed containers
Fume Hoods  FIN8
 MBC4 VOCs / HAPs Best work practices, including
closed containers
Pre-Mix Process  10A VOCs / HAPs Best work practices, including
closed containers
Fiberglass Cutting  17A
PM2.5 / PM10
Vacuum system equipped
with polyester cartridge filters;
MERV 15
VOCs / HAPs Best work practices
Notes:
CCC – Cast Cure Complex
MBC4 – Mix Bowl Cleaning 4
FIN8 – Finishing 8
SHIP6 – Shipping 6
Pre-Batch Storage – Building 2603

5.2. Emission Control Descriptions
5.2.1. Fuel Combustion Control Descriptions
Use of natural gas-fired engine
Natural gas may be used as an alternate fuel source to traditional diesel emergency
engines. Natural gas engines typically emit less emissions than an equivalent-sized
diesel-fired engine.
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Use of propane-fired engine
Similar to natural gas, propane fuel may be used as an alternate fuel source to traditional
diesel emergency engines. Propane engines typically emit less emissions than an
equivalent-sized diesel-fired engine.
Use of Tier-Certified (Tier 2 or 3) diesel-fired engine
Diesel engines utilize ultra-low sulfur diesel fuel, which helps eliminates fuel-bound NOx
associated with combustion. Much of the fuel-bound nitrogen is removed during the
sulfurization process. Tier-Certified engines satisfy EPA’s New Source Performance
Standards (NSPS) IIII and Maximum Achievable Control Technology (MACT) ZZZZ
emission standards. These engines are limited to 100 hours per year for maintenance and
non-emergency use.
Selective Catalytic Reduction (SCR) and Diesel Particulate Filters (DPF) (Tier
4 Certified)
The Tier 4 diesel engine standards require that emissions of PM and NOx be further
reduced by about 90%. Such emission reductions can be achieved using control
technologies, including SCR and DPF. SCR is a post-combustion NOx reduction
technology that uses ammonia to react with NOx in the gas stream in the presence of a
catalyst.
Use of ULSD
Diesel engine emissions contain sulfur, which is emitted from the exhaust as SO2. SO2
emissions are directly proportional to the amount of sulfur in the diesel. NGSC only uses
ULSD, which contains less than 15 parts per million (ppm) sulfur. This represents the top
level of possible control.
5.2.2. VOC / HAP Control Descriptions
Carbon Adsorber
Emissions are directed through a vessel filled with activated carbon. VOC and organic
HAP emissions are adsorbed to the carbon surface. Flow rates of up to 18,000 cubic feet
per minute (cfm) can be accommodated by a single vessel. The system is most suitable
for VOC/HAP exhaust streams that are of low to moderate concentration. Carbon adsorber
systems provide effective control on intermittent exhaust streams. Carbon must be
changed periodically to maintain adsorber capacity.
Regenerative Thermal Oxidizer (RTO)
An RTO system utilizes high temperature to oxidize VOC and organic HAPs. A packed
bed (typically ceramic material) preheats the incoming VOC/HAP exhaust stream. The
preheated exhaust stream travels to a combustion chamber where VOC/HAP destruction
occurs. Hot exhaust gases from the combustion chamber are distributed over the packed
bed to conserve heat energy. Preheating the exhaust stream reduces external energy
inputs into the combustion chamber (natural gas), thus reducing secondary NOx
emissions from the process. RTO systems can be sized for various flow rates and
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VOC/HAP input concentrations but require consistent exhaust flow to maintain the desired
efficiency.
Rotary Concentrator – Regenerative Thermal Oxidizer (RC-RTO)
A rotary concentrator – regenerative thermal oxidizer (RC-RTO) system utilizes a rotating
wheel that supports an adsorbent media (often zeolite). VOC/HAPs in the exhaust stream
are adsorbed onto the media to remove 95 to 98% of the contaminant. A small portion of
the exhaust stream bypasses the concentrator and runs through the RTO. There the
VOC/HAPs are destroyed and the air is heated. The heated air is returned to the rotary
concentrator during the desorption phase. The VOC/HAP concentration is increased by a
factor of approximately 100 in the desorption gas stream. Additionally, the RTO volume
capacity can be reduced by a factor of 20. The concentrator allows the system to operate
effectively on exhaust streams that have low VOC/HAP concentrations and operate
intermittently. Furthermore, the overall size and energy requirements of the system are
reduced because less air is pushed through the RTO unit.
Packed Scrubber
A packed scrubber system uses a packing media and collection solution to remove
pollutants from the exhaust stream. The technology is mainly used, and is most suitable,
for removal of inorganic contaminants in the gas stream. However, VOC/HAP emissions
can be scrubbed if the organic contaminants are water soluble or a surfactant is added to
the scrubbing solution. Generally, cost effectiveness is enhanced if recovery of the spent
material is desirable.
Thermal Incinerator
A thermal incinerator utilizes high temperature to oxidize VOC and organic HAPs.
Typically, the combustion chamber is fired by natural gas to reach temperatures necessary
for full oxidation. Unlike, RTO systems, general thermal incinerators do not incorporate
heat recovery from the exhaust stream. The systems are best implemented on processes
that have continuous exhaust streams with consistent pollutant loading.
Condensers
Condensers are designed to separate one or more parts of a vapor mixture into a liquid.
Condensers work best on gas streams that have materials with low vapor pressures,
higher concentrations, and moderately high temperatures.
Catalytic Oxidizer
Catalytic oxidizers use a catalyst to promote the oxidation of VOCs to carbon dioxide and
water. The primary difference between catalytic oxidizers and thermal incinerators is that
the air passes through a catalyst bed in a catalytic oxidizer. The catalyst increases the
oxidation reaction rate, enabling conversion at lower reaction temperatures than in thermal
incinerators (EPA, 2003). Catalytic oxidizers are most appropriate for low VOC
concentrations.
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Best Work Practices
Best work practices include proper product handling and good housekeeping measures
to minimize emissions.
5.2.3. Particulate Control Descriptions
Fabric Filter
Standard process dust collection can be performed with polyester filters. This type of filter
is approximately 90-95% efficient with particulate >1.0-micron.
5.3. BACT Evaluation
The top-down BACT analysis is grouped by equipment and then by pollutant. BACT calculations
are included in Attachment 4.
5.3.1. Emergency Generators
The emergency generators will provide emergency electrical power when line power is not
available. Emissions are shown in Table 3.

Table 3. Emergency Generators Emissions Summary
Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Emergency Generators 2.55 0.08 0.08 0.13 1.45 0.003 0.008

NOx / Particulate / VOC / CO Emissions from Emergency Generators
Step 1: Identify Control Technologies for NOx / Particulate / VOC / CO Emissions
NGSC considered the following control technologies:

1. Use of natural gas-fired engine
2. Use of propane-fired engine
3. Use of Tier Certified (Tier 2 or 3) diesel-fired engine
4. Selective Catalytic Reduction (SCR) and Diesel Particulate Filters (DPF) (Tier 4
Certified)

These controls are described in Section 5.2 Emission Control Descriptions.
Step 2: Eliminate Technically Infeasible Options
1. Use of natural gas-fired engine

The emergency engines at Bacchus Works must meet the National Fire Protection
Association Standard for Emergency and Standby Power Systems (NFPA 110).
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NFPA 110 states that diesel fuel is the preferred choice in Level 1 installations
where the probability of interruption to fuel supplies is high.

The Bacchus Works site is located in West Valley City, which is recognized as
having a high likelihood of interruption due to earthquakes, based on the University
of Utah’s seismicity risk map (University of Utah, 2022). With a high likelihood for
natural gas supply interruption, a natural gas emergency engine may not meet the
NFPA 110 Standard. For this reason, natural gas-fired engines are not considered
technically feasible.

2. Use of propane-fired engine

Through discussion with vendors, NGSC determined propane engines are not
manufactured in the required sizes. Project Prime requires engines rated between
450 and 3000 kW (755 and 4309 hp), and for this reason, propane engines are not
considered technically feasible.

3. Use of Tier Certified (Tier 2 or 3) diesel-fired engine

As stated above, the NFPA 110 Standard states that diesel fuel is the preferred
choice in Level 1 installations where the probability of interruption to fuel supplies
is high. Ultra-low sulfur diesel engines are manufactured in the required sizes (755
and 4309 hp) and therefore considered a technically feasible option.

NGSC discussed available tier ratings in 755 hp and 4309 hp diesel engines with
Caterpillar and Cummins vendors. Engines greater than 750 hp are not
manufactured as Tier 3 certified, as confirmed by the vendors. For this reason,
only a Tier 2 engine is considered a technically feasible option. Because Tier
Certified Tier 2 engines meet NSPS IIII and MACT ZZZZ, further evaluation is not
warranted.

4. Selective Catalytic Reduction (SCR) and Diesel Particulate Filters (DPF) (Tier 4
Certified)

While Tier 4 engines are designed to reduce emissions, generators used for
emergency standby power are exempt from the final Tier 4 regulations.
Additionally, SCR and DPF technologies have technical challenges when applied
to emergency engines. Since emergency engines typically operate for short
periods at no or low load during monthly O&M, the engine exhaust would not reach
the temperature required for the catalyst to operate (UDAQ, 2018). For this reason,
Tier 4 engines are not considered a technically feasible option.

Step 3: Rank Technically Feasible Control Options
Ultra-low sulfur Tier 2-certified diesel engines are considered technically feasible options.
Step 4: Energy, Environmental, and Economic Feasibility of Remaining Controls
Ultra-low sulfur Tier 2-certified diesel engines are considered economically feasible.
Step 5: Proposed BACT
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NGSC proposes ULSD Tier 2-certified diesel engines as BACT.
SO2 Emissions
Step 1: Identify Control Technologies for SO2 Emissions
NGSC considered the following control technology:
1. Use of ULSD

This control is described in Section 5.2 Emission Control Descriptions.
Step 2: Eliminate Technically Infeasible Options
ULSD is available for use and is considered feasible.
Step 3: Rank Technically Feasible Control Options
Use of ULSD fuel is the top level of control for SO2 emissions.
Step 4: Energy, Environmental, and Economic Feasibility of Remaining Controls
ULSD is commonly available and does not cost extra or affect energy efficiency.
Step 5: Proposed BACT
The use of ULSD is feasible and provides the highest level of control for SO2 emissions.
ULSD is therefore selected as BACT for these generators.
5.3.2. Natural Gas-Fired Boilers (< 2.0 MMBtu/hr)
The Project Prime natural gas-fired boilers emissions are shown in Table 4.

Table 4. Natural Gas-Fired Boilers Emissions Summary
Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Natural Gas-Fired Boilers 2.52 0.51 0.51 0.37 5.67 0.06 0.13

NOx / Particulate / VOC / CO / SO2 Emissions
All natural gas-fired boilers will be rated less than 2 MMBtu/hr. These boilers will be
equipped with low NOx burners, as required under Utah Administrative Code (UAC)
Section R307-401-4(3). NGSC spoke with several boiler manufacturers and was unable
to find small (< 2 MMBtu/hr) natural gas equipment manufactured with ultra-low NOx
burners. For these reasons, the low NOx burners and good combustion practices are
considered BACT for this small natural gas equipment.
5.3.3. Natural Gas-Fired Heaters and AHU (≤ 0.10 MMBtu/hr)
The natural gas-fired heaters and AHU emissions are shown in Table 5.
Table 5. Natural Gas-Fired Heaters and AHU Emissions Summary
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Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Natural Gas-Fired Heaters and AHU 0.07 0.01 0.01 0.004 0.06 0.001 0.001

NOx / Particulate / VOC / CO / SO2 Emissions
The natural gas-fired heaters and AHU are small, each rated at less than 0.05 MMBtu/hr.
This small equipment is not manufactured with low NOx burners. For these reasons, good
combustion practices are considered BACT for the heaters and AHU.
5.3.4. Material Use – CCC and Finishing 8
Materials containing VOCs and/or HAPs will be used in the CCC and FIN8 buildings. Materials in
the CCC and FIN8 are hand-applied and emissions are based on material usage. VOC and HAP
emissions are ventilated through each building’s exhaust from multiple workstations. Separate
control technologies would be needed for each building. Emissions are shown in Table 6.

Table 6. Material Use Emissions Summary
Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Material Use – CCC -- -- -- 1.85 -- -- 0.14
Material Use – FIN8 -- -- -- 1.04 -- -- 0.13

VOC/HAP Emissions
Step 1: Identify Control Technologies for VOC/HAP Emissions
NGSC considered the following control technologies:

1. Carbon absorber
2. RTO
3. RC-RTO
4. Packed scrubber
5. Catalytic Oxidizer
6. Best work practices

These controls are described in Section 5.2 Emission Control Descriptions.

Step 2: Eliminate Technically Infeasible Options

1. Carbon Adsorber
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A carbon adsorber system can be appropriately sized for the minimal flow rate and
contaminant loading from the individual CCC and FIN8 processes. The technology
is considered technically feasible.

2. RTO

Although an RTO system may be sized for the flow rates and VOC, the operations
in each building will be intermittent in nature and not provide a continuous exhaust
stream. The system will not be able to achieve the desired heat recovery efficiency
to offset natural gas use and secondary NOx emissions. Therefore, an RTO
system to treat VOC emissions in the exhaust streams is not considered
technically feasible for the CCC and FIN8 buildings.

3. RC-RTO

A RC-RTO hybrid system uses the adsorbing capability to overcome intermittent
operation. Additionally, concentrating the contaminants into a smaller exhaust
stream volume allows for the RTO unit to be smaller in size. The smaller size
reduces up front capital costs but also recurring electricity and natural gas
requirements. This combination overcomes the technical hurdles encountered by
a RTO system on its own. Therefore, a RC-RTO system is considered technically
feasible.

4. Packed Scrubber

The many different materials used in the casting and finishing processes are
primarily hydrocarbons, and therefore hydrophobic. It would require a compatible
collection solution to adequately scrub the contaminants. The increased cost and
complexity to add a specialized scrubbing solution is not warranted since the VOCs
from the casting and finishing processes will not be recovered. For this reason, a
packed scrubber is not considered to be technically feasible for the CCC and FIN8
buildings.

5. Catalytic Oxidizer

Catalytic oxidizers work well with low VOC streams and require lower
temperatures, compared to an RTO system. A catalytic oxidizer is considered
technically feasible.

6. Best Work Practices

Best work practices are considered technically feasible.
Step 3: Rank Technically Feasible Control Options
1) Catalytic oxidizer can reduce VOC concentrations by 95% or greater.
2) RC-RTO can reduce VOCs concentrations by 95% or greater.
3) Carbon adsorption can reduce VOCs concentrations by 90% or greater.
4) Best work practices can help prevent VOC emissions.
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Step 4: Energy, Environmental, and Economic Feasibility of Remaining Controls
1. Catalytic Oxidizer

An economical evaluation was conducted to review the cost to control MBC4
cleaning emissions using a catalytic oxidizer (see Section 5.3.5 for details). The
CCC and FIN8 processes emit less than the evaluated MBC4 process, including
significantly less hourly VOC emissions. Since it was economically infeasible for
the MBC4 process, it can be deduced that it would also not be economically
feasible for the CCC and FIN8 process.

2. RC-RTO

A proposal was requested from The CMM Group in 2021 for the design of a RC-
RTO system that would effectively control VOC/HAP emissions. Installation was
not included in the cost estimate. The capital cost was over 2 million dollars. Due
to the extremely high capital cost and low emission rate (1.85 tpy or 0.0002 lb/hr
VOC), a RC-RTO system would not be economically feasible.

3. Carbon Adsorber

An economical evaluation was conducted to review the cost to control MBC4
cleaning emissions using a carbon adsorber (see Section 5.3.5 for details). The
CCC and FIN8 processes emit less than the evaluated MBC4 process, including
significantly less hourly VOC emissions. Since it was economically infeasible for
the MBC4 process, it can be deduced that it would also not be economically
feasible for the CCC and FIN8 process.

4. Best work practices are considered economically feasible.
Step 5: Proposed BACT
Best workplace practices will be used to minimize excess VOC/HAP emissions by keeping
containers closed and promptly cleaning spilled materials in the CCC and FIN8 buildings.
5.3.5. Mix Bowl Cleaning
The propellant mixing bowls are cleaned with a volatile solvent after every mix. The cleaning
material does not contain HAPs. The emissions from this process are shown in Table 7.

Table 7. Mix Bowl Cleaning Emissions Summary
Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Mix Bowl Cleaning -- -- -- 2.33 -- -- --
VOC Emissions
Step 1: Identify Control Technologies for VOC Emissions
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NGSC considered the following control technologies:

1. Carbon adsorber
2. RTO
3. RC-RTO
4. Thermal incinerator
5. Packed scrubber
6. Catalytic Oxidizer
7. Best work practices

These controls are described in Section 5.2 Emission Control Descriptions.

Step 2: Eliminate Technically Infeasible Options
1. Carbon Adsorber

A carbon adsorber system can be appropriately sized for the flow rate and contaminant
loading from the mix bowl cleaning process. The carbon adsorber system is less
sensitive to the intermittent operation of the cleaning process. The technology is
considered technically feasible.

2. RTO

Although an RTO system may be sized for the flow rates and VOC, the mix bowl
cleaning will be intermittent in nature and not provide a continuous exhaust stream.
The system will not be able to achieve the desired heat recovery efficiency to offset
natural gas use and secondary NOx emissions. Therefore, an RTO system to treat
VOC emissions in the exhaust streams is not considered technically feasible for the
mix bowl cleaning.

3. RC-RTO

A RC-RTO hybrid system uses the adsorbing capability to overcome intermittent
operation. Additionally, concentrating the contaminants into a smaller exhaust stream
volume allows for the RTO unit to be smaller in size. The smaller size reduces up front
capital costs but also recurring electricity and natural gas requirements. This
combination overcomes the technical hurdles encountered by a RTO system on its
own. Therefore, a RC-RTO system is considered technically feasible.

4. Thermal Incinerator

Similar to an RTO system, a thermal incinerator performs best when a consistent
exhaust stream is supplied to the unit. Intermittent, non-continuous operation of the
mix bowl cleaning process increases secondary emissions due to startup/shutdown
sequences necessary to match the down times of paint booths. Otherwise, the
incinerator would need to run continuously and would likely produce more secondary
emission (NOx in particular) than VOC destroyed by the unit. For this reason, a thermal
incinerator is not technically feasible to control VOCs from the mix bowl cleaning
process.
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5. Packed Scrubber

The VOC used in the bowl cleaning process is hydrophobic and would require a
compatible collection solution to adequately scrub the contaminant. The increased
cost and complexity to add a specialized scrubbing solution is not warranted since the
VOC from the cleaning process will not be recovered. For this reason, a packed
scrubber is not technically feasible.

6. Catalytic Oxidizer

Catalytic oxidizers work well with low VOC streams and require lower temperatures,
compared to an RTO system. A catalytic oxidizer is considered technically feasible.

7. Best Work Practices

Best work practices are considered technically feasible.
Step 3: Rank Technically Feasible Control Options
1) Catalytic oxidizer can reduce VOC concentrations by 95% or greater.
2) RC-RTO can reduce VOCs concentrations by 95% or greater.
3) Carbon adsorption can reduce VOCs concentrations by 90% or greater.
4) Best work practices can help prevent VOC emissions.
Step 4: Energy, Environmental, and Economic Feasibility of Remaining Controls
1. Catalytic Oxidizer

The CMM Group was consulted to design and price a catalytic oxidizer to control
VOC emissions. A catalytic oxidizer with a heat exchanger was recommended due to
the lower operating costs and fuel use. A summary of the anticipated cost is shown
in Table 8.
Table 8. Cost Effectiveness per Ton: Catalytic Oxidizer
Description Estimated Cost
Purchased Equipment Cost $ 379,214
Direct Installation Cost $ 117,220
Indirect Installation Cost $ 61,882
Contingency Cost (10%) $ 55,832
Total Capital Investment (TCI) $ 614,149
Total Annual Cost (TAC) $ 73,392

Annual VOC Removed (tons/yr) 2.21
Cost Effectiveness ($/ton) $ 33,140

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As shown in Table 9, there is significant cost to purchase, install, and operate a
catalytic oxidizer system, at over $30k per ton VOC reduced. For this reason, a
catalytic oxidizer is not considered economically feasible.

2. RC-RTO

As described in the material use BACT for CCC and FIN8 (Section 5.3.4), the capital
cost of a RC-RTO is extremely high. To treat 2.33 tons per year, a RC-RTO would
not be economically feasible.

3. Carbon Adsorber

The Carbtrol Corporation (Carbtrol) was consulted to determine the amount of
carbon required, as well as the type of carbon vessel to control VOC emissions from
the mix bowl cleaning process. Carbtrol recommended 4,100 lbs of carbon, based
the expected contaminant concentration and flow rate.

The EPA’s carbon adsorbers calculation workbook (v. November 2020) was used to
estimate the expected cost to install and operate a carbon adsorption system. This
cost spreadsheet is part of Section 3 of the EPA Air Pollution Control Cost Manual
(EPA, 2018). A detailed cost estimate is included in Attachment 4. All costs were
adjusted to 2023 values using the formulas in the spreadsheet. The cost analysis is
based on one 4,100 lb carbon adsorber unit to accommodate an intermittent flow
rate of up to 5,300 cfm. A summary of the anticipated cost is shown in Table 9.

Table 9. Cost Effectiveness per Ton: Carbon Adsorption System
Description Estimated Cost
Purchased Equipment Cost $ 369,146
Direct Installation Cost $ 110,744
Indirect Installation Cost $ 103,361
Contingency Cost (10%) $ 58,325
Total Capital Investment (TCI) $ 641,576
Total Annual Cost (TAC) $ 102,846

Annual VOC Removed (tons/yr) 2.28
Cost Effectiveness ($/ton) $ 45,018

As shown in Table 9, there is significant cost to purchase, install, and operate the carbon
adsorption system. For this reason, a carbon adsorption system is not considered
economically feasible.

4. Best work practices
Best work practices are considered economically feasible.
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 24 of 33

Step 5: Proposed BACT
Workplace practices will be used to minimize excess VOC emissions in MBC4 by keeping
containers closed and promptly cleaning spilled material.
5.3.6. Fume Hoods
Fume hoods will be installed in the FIN8 and MBC4 buildings. The fume hood emissions are
shown in Table 10.

Table 10. Fume Hoods Emissions Summary
Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Fume Hood – FIN8 -- -- -- 3.9E-06 -- -- 4.1E-06
Fume Hood – MBC4 -- -- -- 0.37 -- -- --

VOC/HAP Emissions
Step 1: Identify Control Technologies for VOC/HAP Emissions
NGSC utilized the 2018 UDAQ BACT review document (UDAQ, 2018) to identify the
following as possible fume hood control technologies:

1. Condensers
2. Thermal incinerator
3. Carbon adsorber
4. Best work practices

These controls are described in Section 5.2 Emission Control Descriptions.

Step 2: Eliminate Technically Infeasible Options
Due to the low and varying concentrations and characteristics of VOCs and HAPs in the
fume hood exhaust, condensers are not considered technically feasible from such exhaust
streams (UDAQ, 2018).

Though the fume hood emissions are very low, thermal oxidation, carbon adsorption, and
best work practices are considered technically feasible options to reduce VOC and HAP
emissions.
Step 3: Rank Technically Feasible Control Options
1) Thermal incinerators can reduce VOC concentrations by 95% or greater.
2) Carbon adsorption can reduce VOCs concentrations by 90% or greater.
3) Best work practices can help prevent VOC emissions.
Step 4: Energy, Environmental, and Economic Feasibility of Remaining Controls
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 25 of 33

The UDAQ BACT review document (UDAQ, 2018) estimated the economic feasibility of a
thermal incinerator. The annualized cost (in 2017 dollars) was over $600,000 per ton VOC.
It is evident that installing a thermal incinerator is not economically feasible.

A carbon adsorber economical evaluation was conducted in Section 5.3.5 and found to be
economically infeasible for a process with higher VOC emissions. A presumptive analysis
based on the MBC4 analysis was used to determine a carbon adsorber is not economically
feasible for fume hoods.

Best work practices are considered economically feasible.
Step 5: Proposed BACT
Best workplace practices will be used to minimize fume hood VOC and HAP emissions.
Best practices include minimizing material use when possible and sealing containers when
not in use.
5.3.7. Pre-Mix Process
The pre-mix process is a batch process where solid maleic anhydride briquettes are added to a
non-volatile liquid in a sealed reactor in Building 10A. Emissions are shown in Table 11.
Table 11. Pre-Mix Process Emissions Summary
Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Pre-Mix Process -- -- -- 0.03 -- - 0.03
VOC/HAP Emissions
Step 1: Identify Control Technologies for VOC/HAP Emissions
The pre-mix process in Building 10A occurs in batches, where some maleic anhydride is
emitted during gas purging. The EPA’s RBLC database did not contain any results for
maleic anhydride. However, AP-42 Chapter 6.14 described carbon absorbers and
incinerators as possible maleic anhydride control technologies. NGSC also considered
best work practices, as listed below. These controls are described in Section 5.2 Emission
Control Descriptions.

1. Carbon absorber
2. RTO
3. RC-RTO
4. Catalytic Oxidizer
5. Best work practices

Step 2: Eliminate Technically Infeasible Options
1. Carbon Adsorber

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 26 of 33

NGSC discussed a carbon adsorber system with Carbtrol, but due to the high exit
temperature (>110 °F), the carbon vessel and construction materials would be easily
damaged and Carbtrol does not recommend a carbon adsorption system. NGSC
cannot alter the exit temperature, so for this reason the carbon adsorbers are not
considered technically feasible.

2. RTO

Although a RTO system can be sized for the flow rates and VOC input concentration,
the operation of the pre-mix process will be intermittent in nature and not provide a
continuous exhaust stream. The system will not be able to achieve the desired heat
recovery efficiency to offset natural gas use and secondary NOx emissions. Therefore,
a RTO system to treat VOC emissions in the pre-mix exhaust stream is not technically
feasible.

3. RC-RTO

As described for the RTO system, the operation of the pre-mix process will be
intermittent in nature and not provide a continuous exhaust stream. The system will
not be able to achieve the desired heat recovery efficiency to offset natural gas use
and secondary NOx emissions. Therefore, a RC-RTO system to treat VOC emissions
in the pre-mix exhaust stream is not technically feasible.

4. Catalytic Oxidizer

Catalytic oxidizers work well with low VOC streams and require lower temperatures,
compared to an RTO system. A catalytic oxidizer is considered technically feasible.

5. Best Work Practices

Best work practices can be performed throughout the pre-mix process and is therefore
considered technically feasible.

Step 3: Rank Technically Feasible Control Options
A catalytic oxidizer and best work practices are considered technically feasible
options.
Step 4: Energy, Environmental, and Economic Feasibility of Remaining Controls
1. Catalytic Oxidizer

An economical evaluation was conducted to review the cost to control MBC4
cleaning emissions using a catalytic oxidizer (see Section 5.3.5 for details). The pre-
mix process emit significantly less emissions than the evaluated MBC4 process,
including significantly less hourly VOC emissions. Since it was economically
infeasible for the MBC4 process, it can be deduced that it would also not be
economically feasible for the pre-mix process.
.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 27 of 33

2. Best work practices

Best work practices are a feasible option to reduce VOCs and HAPs from this process.
Step 5: Proposed BACT
Best workplace practices will be used to minimize excess VOC/HAP emissions by keeping
containers closed and promptly cleaning spilled material.
5.3.8. Fiberglass Cutting
Particulate Emissions
Cutting fiberglass in Building 17A will result in fine particulate matter that needs to be
exhausted out of the building to prevent employee exposure and accumulation. Common
dust control technologies were considered to minimize emissions to outdoor air. A dust
collector with fabric filters provides high efficiency removal (95% or greater) of fine
particulate matter.

Based on the process and material, NGSC proposes a MERV 15 dust collector vacuum
system to meet emissions and employee exposure requirements. Emissions are shown in
Table 12.

Table 12. Fiberglass Cutting Emissions Summary
Source
Tons per year
NOx PM10 PM2.5 VOC CO SO2
Total
HAPs
Fiberglass Cutting -- 0.26 0.26 1.1E-04 -- - 1.1E-04

NGSC proposes to install a fabric filter dust collector as BACT for the proposed project.
The dust collector will be connected to a vacuum system to collect fiberglass dust
(particulate) created during the fiberglass cutting process.

NGSC proposes to use a Eurovac EIII Industrial Vacuum System to control the fiberglass
particulate. The Eurovac EIII Industrial Vacuum System has polyester cartridge filters with
Minimum Efficiency Reporting Value (MERV) 15 filtration. A specification summary
for the Eurovac EIII Industrial Vacuum System is shown in Table 13.

Table 13. Specifications for Fiberglass Cutting Control Equipment
Item Specification
Unit ID DC-17A
Manufacturer Eurovac
Make EIII Industrial Vacuum System
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 28 of 33

Item Specification
Model Number SYS-30C-6030FS3B
Filters Polyester cartridge filters;
MERV 15
Details
Cyclonic filter separator, after polyester cartridge
filters (99.93% at 3 microns or larger) and final
automatic pulse jet cleaning

VOC / HAP Emissions
The fiberglass cutting process in Building 17A will generate very minimal VOC and HAP
emissions (Table 12) from an adhesive that is occasionally applied to the fiberglass fabric.
However, the annual emissions are estimated to be less than one pound of VOC and
HAPs, each. Due to the minimal emissions, add-on controls will not be economically
feasible. Best work practices, including keeping the adhesive closed or covered, is
considered BACT for fiberglass cutting VOC and HAP emissions.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 29 of 33

6. Regulatory Analysis
6.1. Federal Regulations
Potential applicable federal regulations include rules for New Source Performance Standards
(NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) for various
source categories. The NSPS and NESHAP standards that are potentially applicable to the
proposed project are discussed in the sections below.
6.1.1. Applicable Regulations
New Source Performance Standards (NSPS) Subpart A – General Provisions
Certain provisions of 40 CFR Part 60 Subpart A apply to the owner or operator of any
stationary source subject to a NSPS. Since the project has units subject to a NSPS, the
proposed project will be required to comply with applicable provisions of Subpart A.
NSPS Subpart IIII – Standards of Performance for Stationary Compression
Ignition Internal Combustion Engines
NSPS Subpart IIII applies to owners and operators of combustion-ignition (CI) internal
combustion engines (ICE) that commenced construction after 2006. The engines are
certified Tier 2 engines and meet the emissions standards of 40 CFR 60.4205(b) and
60.4202(a)(2). NSPS Subpart IIII will apply to the diesel-fired emergency generators.
National Emission Standards for Hazardous Air Pollutants (NESHAP)
Subpart A – General Provisions
Certain provisions of 40 CFR Part 63 Subpart A apply to the owner or operator of any
stationary source subject to a NESHAP. Since the facility will have units subject to a
NESHAP, the project will be required to comply with applicable provisions of Subpart A.
NESHAP Subpart ZZZZ – NESHAP for Stationary Reciprocating Internal
Combustion Engines
This subpart applies to owners and operators of stationary RICE at a major or area source
of HAP emissions. Because the new emergency generators are stationary RICE at an
area source of HAP emissions, NESHAP Subpart ZZZZ will apply to the proposed
generators. In accordance with 40 CFR 63.6590(c)(1), a new emergency stationary RICE
with a site rating of more than 500 brake-hp located at an area source of HAP emissions
is only required to comply with the requirements of 40 CFR 60 Subpart IIII. The two
emergency generators are each rated greater than 500 hp so no other requirements of
Subpart ZZZZ apply.
Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 30 of 33

6.1.2. Non-Applicable Regulations
NSPS Subpart Dc – Standards of Performance for Small Industrial-
Commercial-Institutional Steam Generating Units
NSPS Subpart Dc applies to owners and operators of small industrial steam generating
units between 10 and 100 MMBtu/hr. Since all new boilers are less than 10 MMBtu/hr,
NSPS Subpart Dc will not apply to the proposed boilers.
6.2. Serious Ozone Nonattainment Evaluation
As shown in Table 1, the new NOx and VOC PTE are both less than 50 tons per year. Based on
the new PTE, NGSC should not be considered a potential major stationary source after the
Northern Wasatch Front is reclassified to serious nonattainment for ozone.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 31 of 33

7. HAP Evaluations
7.1. Proposed HAP Allocations
The current Bacchus Works AO limits the following in Condition II.B.2.a:
A. Combined HAPs to 24.90 tons per rolling 12-month period
B. Individual HAPs to 9.90 tons per rolling 12-month period
C. 2,4 toluene diisocyanate (TDI) to 0.98 tons per rolling 12-month period
UDAQ requested a breakout of HAP emissions, allocating limits to each reportable HAP, as
necessary. The accounting of source-wide HAPs includes a category for generic HAPs (1.99
tons per year) and individual HAPs (22.91 tons per year), for a site-wide total of 24.90 tons per
year total HAPs. A table with the proposed HAP allocations is shown in Attachment 5. The
allocations include the potential HAPs from Project Prime.
7.2. Project Prime HAPs Screening
The Project Prime HAPs were individually reviewed and screened against the UDAQ’s emission
threshold values (ETVs) to determine if any HAPs require an emissions impact analysis. One
HAP, maleic anhydride, exceed its respective ETV and an emissions impact analysis was
performed. The analysis is included in Attachment 6.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 32 of 33

8. Emissions Impact Analysis
The Emissions Impact Analysis Report for maleic anhydride is included in Attachment 6.

Notice of Intent Application
Project Prime
Site: Bacchus Works

Page 33 of 33

9. References
ACC (2012). American Chemistry Council. MDI Emissions Reporting Guidelines for the
Polyurethane Industry. AX186.
ASHRAE (2017). American Society of Heating, Refrigeration, and Air Conditioning Engineers.
Standard 52.2: Method of Testing General Ventilation Air-Cleaning Devices for Removal
Efficiency by Particle Size.
CARB (2008). Policy: CARB Emission Factors for CI Diesel Engines – Percent HC in Relation to
NMHC + NOx.
https://www.baaqmd.gov/~/media/files/engineering/policy_and_procedures/engines/emis
sionfactorsfordieselengines.pdf?la=en
EPA (2003). Air Pollution Control Technology Fact Sheet: Catalytic Incinerator. EPA-452/F-03-
018.
EPA (2005). Emission Inventory Improvement Program. Chapter 8. Preferred and Alternative
Methods for Estimating Air Emissions from Paint, Ink, and Other Coating Manufacturing
Facilities.
EPA (2018). EPA Air Pollution Control Cost Manual. Section 3 – VOC Controls.
UDAQ (2018). Utah Division of Air Quality. Appendix A.: BACT for Various Emission Units at
Stationary Sources. DAQ-2018-007161.
University of Utah (2022). U of U Seismograph Stations. Utah’s Earthquake Threat.
https://quake.utah.edu/outreach-education/utahs-earthquake-threat

Attachment 1: Site Plan

MAGNA
BACCHUS-NIROP� -·
r c:h.·7-i..... � ,..i ·-,,::r 7 l \ ��US-PLANT ,I
i:1---( L.J·�.J
�BACCHUS-WEST
IM AGE FROM GOOGLE EARTH
TAYLORSVILLE
KEARNS
OQUIRRH
o' 10,000'L--- -
WEST �ORDAN
SANDY
NORTHROP--, GRUMMAN I
FIGURE 1. BACCHUS FACILITY LOCATION MAP
PRE- BATCH
STORAGE
CC #3
CASTING/CURING
BUILDING #3 CC #4
CASTING/CURING
BUILDING #4
MIX BOWL
CLEANING
BUILDING #4
AND UTILITY
BLDGS
FINISHING
BUILDING #8
SHIPPING
BUILDING #6
CONTROL HOUSE
TRAMWAY
UTILITY BUILDING
LEGEND
PROPOSED BUILDING
BACCHUS OVERALL SITE PLAN
0 2000SCALE: 1"=1000'-0"
EXISTING BUILDING

Attachment 2: UDAQ Process Information Forms

Utah Division of Air Quality Company____________________________
New Source Review Section Site/Source__________________________
Date____________________
Form 2
Process Information

Process Data
1. Name of process:

2. End product of this process:

3. Primary process equipment: _______________ Manufacturer:__________________________________
Make or model: _________________________ Identification #: ________________________________
Capacity of equipment (lbs/hr): Year installed:__________________________________
Rated _____________ Max.____________
(Add additional sheets as needed)

4. Method of exhaust ventilation:
Ƒ Stack Ƒ Window fan Ƒ Roof vent Ƒ Other, describe _______________________

Are there multiple exhausts: Ƒ Yes Ƒ No
Operating Data

5. Maximum operating schedule:
__________ hrs/day
__________days/week
__________weeks/year

6. Percent annual production by quarter:
Winter ________ Spring _______
Summer ________ Fall ________

7. Hourly production rates (lbs.):

Average ________ Maximum ________

8. Maximum annual production (indicate units):
__________________
Projected percent annual increase in production:
__________________

9. Type of operation: Ƒ Continuous
Ƒ Batch
Ƒ Intermittent

10. If batch, indicate minutes per cycle ________
Minutes between cycles ________

11. Materials used in process

Raw Materials

Principal Use

Amounts
(Specify Units)

Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Fume Hood - MBC4 Manual/hand cleaning in MBC4 fume hood
Fume Hood TBD
TBD
TBD
24 25%
365 25%
25%
25%
50
N/AN/A
Cleaning material
Proprietary Manual mix bowl cleaning See emission calculations
✔
✔
✔
Fume Hoods (MBC4)
Page 2 of 3

Process
Form 2 (Continued)

12. Control equipment (attach additional pages if necessary)

Item

Primary Collector

Secondary Collector

a. Type

b. Manufacturer

c. Model

d. Year installed

e. Serial or ID#

f. Pollutant controlled

g. Controlled pollutant emission
rate (if known)

h. Pressure drop across control
device

i. Design efficiency

j. Operating efficiency

Stack Data
(attach additional pages if necessary)

13. Stack identification:

14. Height: Above roof ________ft
Above ground ________ft

15. Are other sources vented to this stack:
Ƒ Yes Ƒ No

If yes, identify sources:

16. Ƒ Round, top inside diameter dimension
_________
Ƒ Rectangular, top inside dimensions
length ________ x width ________

17. Exit gas: Temperature ________ oF Volume ________ acfm Velocity ________ ft/min

18. Continuous monitoring equipment: Ƒ yes Ƒ no
If yes, indicate: Type ____________________ Manufacturer _________________________________

Make or Model ____________ Pollutant(s) monitored __________________________
Emissions Calculations (PTE)

19. Calculated emissions for this device
PM10 ___________ Lbs/hr___________ Tons/yr PM2.5 ____________ Lbs/hr ___________ Tons/yr
NOx____________ Lbs/hr___________ Tons/yr SOx _____________ Lbs/hr___________ Tons/yr
CO ____________ Lbs/hr___________ Tons/yr VOC _____________ Lbs/hr___________ Tons/yr
CO2 ___________ Tons/yr CH4 _____________ Tons/yr
N2O ____________Tons/yr
HAPs_________ Lb s/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.
N/A
72 2500
See individual emissions calculation sheets.
✔
✔
Utah Division of Air Quality Company____________________________
New Source Review Section Site/Source__________________________
Date____________________
Form 2
Process Information
Process Data
1. Name of process: 2. End product of this process:
3. Primary process equipment: _______________ Manufacturer:__________________________________
Make or model: _________________________ Identification #: ________________________________
Capacity of equipment (lbs/hr): Year installed:__________________________________
Rated _____________ Max.____________
(Add additional sheets as needed)
4. Method of exhaust ventilation:
Ƒ Stack Ƒ Window fan Ƒ Roof vent Ƒ Other, describe _______________________
Are there multiple exhausts: Ƒ Yes Ƒ No
Operating Data
5. Maximum operating schedule:
__________ hrs/day
__________days/week
__________weeks/year
6. Percent annual production by quarter:
Winter ________ Spring _______
Summer ________ Fall ________
7. Hourly production rates (lbs.):
Average ________ Maximum ________
8. Maximum annual production (indicate units):
__________________
Projected percent annual increase in production:
__________________
9. Type of operation: Ƒ Continuous
Ƒ Batch
Ƒ Intermittent
10. If batch, indicate minutes per cycle ________
Minutes between cycles ________
11. Materials used in process
Raw Materials Principal Use Amounts
(Specify Units)
Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Fume Hoods - FIN8 Two-part material mixtures in FIN8 fume hoods
Fume hoods TBD
TBD
TBD
24 25%
365 25%
25%
25%
50
N/AN/A
Misc. materials used in the motor finishing process
Proprietary Motor finishing process See emission calculations
✔
✔
✔
Fume Hoods (Finishing 8)
Page 2 of 3

Process
Form 2 (Continued)

12. Control equipment (attach additional pages if necessary)

Item

Primary Collector

Secondary Collector

a. Type

b. Manufacturer

c. Model

d. Year installed

e. Serial or ID#

f. Pollutant controlled

g. Controlled pollutant emission
rate (if known)

h. Pressure drop across control
device

i. Design efficiency

j. Operating efficiency

Stack Data
(attach additional pages if necessary)

13. Stack identification:

14. Height: Above roof ________ft
Above ground ________ft

15. Are other sources vented to this stack:
Ƒ Yes Ƒ No

If yes, identify sources:

16. Ƒ Round, top inside diameter dimension
_________
Ƒ Rectangular, top inside dimensions
length ________ x width ________

17. Exit gas: Temperature ________ oF Volume ________ acfm Velocity ________ ft/min

18. Continuous monitoring equipment: Ƒ yes Ƒ no
If yes, indicate: Type ____________________ Manufacturer _________________________________

Make or Model ____________ Pollutant(s) monitored __________________________
Emissions Calculations (PTE)

19. Calculated emissions for this device
PM10 ___________ Lbs/hr___________ Tons/yr PM2.5 ____________ Lbs/hr ___________ Tons/yr
NOx____________ Lbs/hr___________ Tons/yr SOx _____________ Lbs/hr___________ Tons/yr
CO ____________ Lbs/hr___________ Tons/yr VOC _____________ Lbs/hr___________ Tons/yr
CO2 ___________ Tons/yr CH4 _____________ Tons/yr
N2O ____________Tons/yr
HAPs_________ Lb s/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.
N/A
72 2400
See individual emissions calculation sheets.
✔
✔
Utah Division of Air Quality
New Source Review Section Company: ___________________
Site/Source: _________________
Form 17 Date: _______________________
Diesel Powered Standby Generator
Company Information
1. Company Name and Address:
____________________________________________
____________________________________________
____________________________________________
____________________________________________
Phone Number: _______________________________
Fax Number: _______________________________
2. Company Contact:
____________________________________________
____________________________________________
____________________________________________
____________________________________________
Phone Number: _______________________________
Fax Number: _______________________________
3. Installation Address:
____________________________________________ County where facility is located: __________________
____________________________________________
____________________________________________ Latitude, Longitude and UTM Coordinates of Facility
____________________________________________ __________________________________________
Phone Number: _______________________________ __________________________________________
Fax Number: _______________________________
Standby Generator Information
4. Engines:
Maximum Maximum Emission Rate Date the engine
Manufacturer Model Rated Hours of Rate of NOx was constructed
Horsepower or Kilowatts Operation grams/BHP-HR or reconstructed
_______________________________________________________________________________________________
_______________________________________________________________________________________________
_______________________________________________________________________________________________
_______________________________________________________________________________________________
_______________________________________________________________________________________________
_______________________________________________________________________________________________
_______________________________________________________________________________________________
_______________________________________________________________________________________________
Attach Manufacturer-supplied information
5. Calculated emissions for this equipment:
PM10____________ Lbs/hr _____________Tons/yr PM2.5____________ Lbs/hr _____________Tons/yr
NOx_____________Lbs/hr______________Tons/yr SOx ____________ Lbs/hr______________Tons/yr
CO _____________Lbs/hr______________Tons/yr VOC ____________Lbs/hr______________Tons/yr
CO2 ____________Tons/yr CH4 ____________ Tons/yr
N2O ____________Tons/yr
HAPs___________ Lbs/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.
Northrop Grumman
Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Northrop Grumman Systems Corporation
M/S F/1/EV; P.O. Box 98
Magna, UT 84044-0098
Kris Blauer
[e-mail]
Allia Abdallah
[e-mail]
801 251-2166 801 251-2166 / 801-251-2221
Northrop Grumman Syste Bacchus Works - Plant 1 NIROP Bacchus West
5000 S. 8400 W.
Magna, UT 84044
Salt Lake County
See Form 2
Cummins C3000 D6e 3000 kW 100 Hours Tier 2; 4.56 g/hp-hr TBD
Cummins DFEJ 450 kW 100 Hours Tier 2; 4.56 g/hp-hr TBD
See individual emissions calculation sheets.
Cast Cure Complex & MBC4
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 10 Date __________________________
Fabric Filters (Baghouses)

Baghouse Description
1. Briefly describe the process controlled by this baghouse:

Gas Stream Characteristics
2. Flow Rate (acfm):

4. Particulate Loading (grain/scf)
Design Max

Average
Expected

3. Water Vapor Content of Effluent
Stream (lb. water/lb. dry air)
Inlet Outlet
5. Pressure Drop (inches H2O)
High __________ Low _________
6. Gas Stream Temperature (qF): 7. Fan Requirements (hp) (ft3/min)

Equipment Information and Filter Characteristics
8. Manufacturer and Model Number:
10. Bag Diameter
(in.)
11. Bag Length (ft.) 12. Number of Bags: 13. Stack Height
___________ feet
Stack Inside Diameter
___________ inches
9. Bag Material:
Ƒ Nomex nylon
Ƒ Polyester
Ƒ Acrylics
Ƒ Fiber glass
Ƒ Cotton
Ƒ Teflon
Ƒ ___________
14. Filtering
Efficiency
Rating:

_________%
15. Air to Cloth
Ratio:

______: 1
16. Hours of Operation:
Max Per day ________
Max Per year _______
17. Cleaning Mechanism:
Ƒ Reverse Air Ƒ Shaker
Ƒ Pulse Jet Ƒ Other:
______________________
Emissions Calculations (PTE)
18. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ____________Lbs/hr___________ Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr___________ Tons/yr VOC ___________Lbs/hr___________ Tons/yr
HAPs___________Lbs/hr (speciate)____________Tons/yr (speciate)
Submit calculations as an appendix.
Page 1 of 2
Vacuum dust collector will be used to control particulate generated during new fiberglass cutting
process.
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
880 cfm
0.0144 0.0078TBDTBD
72 30 hp
Eurovac EIII
See individual emissions calculation sheets.
95
24
8760
✔
✔
TBD
TBD
Fiberglass Cutting (Building 17A)
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 19 Date ___________________________
Natural Gas Boilers and Liquid Heaters
Boiler Information
1. Boiler Manufacturer: ___________________________________________________________________________
2. Model Number: ______________________________ 3. Serial Number: _______________________________
4. Boiler Rating: _________________(10
6 Btu per Hour)
5. Operating Schedule: __________ hours per day __________ days per week ___________ weeks per year
6. Use: Ƒ steam: psig Ƒ hot water Ƒ other hot liquid: ________________________________
Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol
Ƒ Process Gas - H2S content in process gas __________ grain/100cu.ft.
7. Fuels:
Ƒ Fuel Oil - specify grade:Ƒ Other, specify: ______________________________________
Sulfur content % by weight Days per year during which unit is oil fired: ________________
Backup
Fuel Ƒ Diesel Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol Ƒ Other _________________
8. Is unit used to incinerate waste gas liquid stream? Ƒ yes Ƒ no
(Submit drawing of method of waste stream introduction to burners)
Gas Burner Information
9. Gas Burner Manufacturer: _____________________________________________________________________
10. No. of Burners: ______________________________ 11. Minimum rating per burner: _____________ cu. ft/hr
12. Average Load: _______% 13. Maximum rating per burner: ____________ cu. ft/hr
14. Performance Guarantee (ppm dry corrected to 3% Oxygen):
NOx: ______________ CO: ______________ Hydrocarbons: ______________
Ƒ Manual Ƒ Automatic on-off15. Gas burner mode of control:
Ƒ Automatic hi-low Ƒ Automatic full modulation
Oil Burner Information
16. Oil burner manufacturer:
17. Model: _______________ number of burners: _________________ Size number: _______________
18. Minimum rating per burner: _____________ gal/hr 19. Maximum rating per burner: ___________ gal/hr
Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Weil-McLain
Model 588
Total Weil-McLain Model 588 natural gas rating: 5.424 MMBtu/hr
24 7 52
✔
✔
✔
30 ppm
Webster Combustion
4 total,1 burner per boiler
TBD
Weil-McLain Boilers - Model 588 (Finishing 8 & Shipping 6)
TBD
800
1357
✔
Page 2 of 3
Form 11 - Natural Gas Boiler and Liquid Heater
(Continued)
Modifications for Emissions Reduction
20. Type of modification: Ƒ Low NOX Burner Ƒ Flue Gas Recirculation (FGR)
Ƒ Oxygen Trim Ƒ Other (specify) ______________________________________

For Low-NOX Burners
21. Burner Type: Ƒ Staged air Ƒ Staged fuel Ƒ Internal flue gas recirculation
Ƒ Ceramic Ƒ Other (specify): ___________________________________________________
22. Manufacturer and Model Number: _______________________________________________________________
23. Rating: ______________________ 106 BTU/HR 24. Combustion air blower horsepower: ____________
For Flue Gas Recirculation (FGR)
25. Type: Ƒ Induced Ƒ Forced Recirculation fan horsepower: ______________________________________
26. FGR capacity at full load: scfm %FGR
27. FGR gas temperature or load at which FGR commences: OF % load
28. Where is recirculation flue gas reintroduced? _______________________________________________________
For Oxygen Trim Systems
29. Manufacturer and Model Number: ________________________________________________________________
30. Recorder: Ƒ yes Ƒ no Describe: ____________________________________________________________
Stack or Vent Data
31. Inside stack diameter or dimensions ____________
Stack height above the ground ________________
Stack height above the building ________________
32. Gas exit temperature: ___________ OF
33. Stack serves: Ƒ this equipment only, Ƒ other equipment (submit type and rating of all other equipment
exhausted through this stack or vent)
34. Stack flow rate: _________________ acfm Vertically restricted? Ƒ Yes Ƒ No
Emissions Calculations (PTE)
35. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ___________Lbs/hr ___________Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr ___________Tons/yr VOC ___________Lbs/hr ___________Tons/yr
CO2 ___________ Tons/yr CH4 ___________Tons/yr
N2O ___________Tons/yr
HAPs_________ Lbs/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.

✔
See individual emissions calculation sheets.
✔
Webster Combustion
Total = 5.424
✔
✔
✔
39 15
TBD TBD
Fan inlet
272
1/2 hp
TBD
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 19 Date ___________________________
Natural Gas Boilers and Liquid Heaters
Boiler Information
1. Boiler Manufacturer: ___________________________________________________________________________
2. Model Number: ______________________________ 3. Serial Number: _______________________________
4. Boiler Rating: _________________(10
6 Btu per Hour)
5. Operating Schedule: __________ hours per day __________ days per week ___________ weeks per year
6. Use: Ƒ steam: psig Ƒ hot water Ƒ other hot liquid: ________________________________
Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol
Ƒ Process Gas - H2S content in process gas __________ grain/100cu.ft.
7. Fuels:
Ƒ Fuel Oil - specify grade:Ƒ Other, specify: ______________________________________
Sulfur content % by weight Days per year during which unit is oil fired: ________________
Backup
Fuel Ƒ Diesel Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol Ƒ Other _________________
8. Is unit used to incinerate waste gas liquid stream? Ƒ yes Ƒ no
(Submit drawing of method of waste stream introduction to burners)
Gas Burner Information
9. Gas Burner Manufacturer: _____________________________________________________________________
10. No. of Burners: ______________________________ 11. Minimum rating per burner: _____________ cu. ft/hr
12. Average Load: _______% 13. Maximum rating per burner: ____________ cu. ft/hr
14. Performance Guarantee (ppm dry corrected to 3% Oxygen):
NOx: ______________ CO: ______________ Hydrocarbons: ______________
Ƒ Manual Ƒ Automatic on-off15. Gas burner mode of control:
Ƒ Automatic hi-low Ƒ Automatic full modulation
Oil Burner Information
16. Oil burner manufacturer:
17. Model: _______________ number of burners: _________________ Size number: _______________
18. Minimum rating per burner: _____________ gal/hr 19. Maximum rating per burner: ___________ gal/hr
Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Weil-McLain
Model 688
Total Weil-McLain Model 688 natural gas rating: 8.505 MMBtu/hr
24 752
✔
✔
✔
30 ppm
Webster Combustion
5;1 burner per boiler
TBD
Weil-McLain Boilers - Model 688 (Cast Cure Complex & MBC4)
900
1701
✔
TBD
Page 2 of 3
Form 11 - Natural Gas Boiler and Liquid Heater
(Continued)
Modifications for Emissions Reduction
20. Type of modification: Ƒ Low NOX Burner Ƒ Flue Gas Recirculation (FGR)
Ƒ Oxygen Trim Ƒ Other (specify) ______________________________________

For Low-NOX Burners
21. Burner Type: Ƒ Staged air Ƒ Staged fuel Ƒ Internal flue gas recirculation
Ƒ Ceramic Ƒ Other (specify): ___________________________________________________
22. Manufacturer and Model Number: _______________________________________________________________
23. Rating: ______________________ 106 BTU/HR 24. Combustion air blower horsepower: ____________
For Flue Gas Recirculation (FGR)
25. Type: Ƒ Induced Ƒ Forced Recirculation fan horsepower: ______________________________________
26. FGR capacity at full load: scfm %FGR
27. FGR gas temperature or load at which FGR commences: OF % load
28. Where is recirculation flue gas reintroduced? _______________________________________________________
For Oxygen Trim Systems
29. Manufacturer and Model Number: ________________________________________________________________
30. Recorder: Ƒ yes Ƒ no Describe: ____________________________________________________________
Stack or Vent Data
31. Inside stack diameter or dimensions ____________
Stack height above the ground ________________
Stack height above the building ________________
32. Gas exit temperature: ___________ OF
33. Stack serves: Ƒ this equipment only, Ƒ other equipment (submit type and rating of all other equipment
exhausted through this stack or vent)
34. Stack flow rate: _________________ acfm Vertically restricted? Ƒ Yes Ƒ No
Emissions Calculations (PTE)
35. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ___________Lbs/hr ___________Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr ___________Tons/yr VOC ___________Lbs/hr ___________Tons/yr
CO2 ___________ Tons/yr CH4 ___________Tons/yr
N2O ___________Tons/yr
HAPs_________ Lbs/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.

✔
See individual emissions calculation sheets.
✔
Webster Combustion
Total = 8.505
✔
✔
✔
48.5 15
TBD TBD
Fan inlet
340
3/4 hp
TBD
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 19 Date ___________________________
Natural Gas Boilers and Liquid Heaters
Boiler Information
1. Boiler Manufacturer: ___________________________________________________________________________
2. Model Number: ______________________________ 3. Serial Number: _______________________________
4. Boiler Rating: _________________(10
6 Btu per Hour)
5. Operating Schedule: __________ hours per day __________ days per week ___________ weeks per year
6. Use: Ƒ steam: psig Ƒ hot water Ƒ other hot liquid: ________________________________
Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol
Ƒ Process Gas - H2S content in process gas __________ grain/100cu.ft.
7. Fuels:
Ƒ Fuel Oil - specify grade:Ƒ Other, specify: ______________________________________
Sulfur content % by weight Days per year during which unit is oil fired: ________________
Backup
Fuel Ƒ Diesel Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol Ƒ Other _________________
8. Is unit used to incinerate waste gas liquid stream? Ƒ yes Ƒ no
(Submit drawing of method of waste stream introduction to burners)
Gas Burner Information
9. Gas Burner Manufacturer: _____________________________________________________________________
10. No. of Burners: ______________________________ 11. Minimum rating per burner: _____________ cu. ft/hr
12. Average Load: _______% 13. Maximum rating per burner: ____________ cu. ft/hr
14. Performance Guarantee (ppm dry corrected to 3% Oxygen):
NOx: ______________ CO: ______________ Hydrocarbons: ______________
Ƒ Manual Ƒ Automatic on-off15. Gas burner mode of control:
Ƒ Automatic hi-low Ƒ Automatic full modulation
Oil Burner Information
16. Oil burner manufacturer:
17. Model: _______________ number of burners: _________________ Size number: _______________
18. Minimum rating per burner: _____________ gal/hr 19. Maximum rating per burner: ___________ gal/hr
Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Lochinvar
Model PBN0502
Total Lochinvar Model PBN0502 natural gas rating: 1.0 MMBtu/hr
24 7 52
✔
✔
✔
30 ppm
2;1 burner per boiler
TBD
Lochinvar Boilers - Model PBN0502 (Cast Cure Complex)
Page 2 of 3
Form 11 - Natural Gas Boiler and Liquid Heater
(Continued)
Modifications for Emissions Reduction
20. Type of modification: Ƒ Low NOX Burner Ƒ Flue Gas Recirculation (FGR)
Ƒ Oxygen Trim Ƒ Other (specify) ______________________________________

For Low-NOX Burners
21. Burner Type: Ƒ Staged air Ƒ Staged fuel Ƒ Internal flue gas recirculation
Ƒ Ceramic Ƒ Other (specify): ___________________________________________________
22. Manufacturer and Model Number: _______________________________________________________________
23. Rating: ______________________ 106 BTU/HR 24. Combustion air blower horsepower: ____________
For Flue Gas Recirculation (FGR)
25. Type: Ƒ Induced Ƒ Forced Recirculation fan horsepower: ______________________________________
26. FGR capacity at full load: scfm %FGR
27. FGR gas temperature or load at which FGR commences: OF % load
28. Where is recirculation flue gas reintroduced? _______________________________________________________
For Oxygen Trim Systems
29. Manufacturer and Model Number: ________________________________________________________________
30. Recorder: Ƒ yes Ƒ no Describe: ____________________________________________________________
Stack or Vent Data
31. Inside stack diameter or dimensions ____________
Stack height above the ground ________________
Stack height above the building ________________
32. Gas exit temperature: ___________ OF
33. Stack serves: Ƒ this equipment only, Ƒ other equipment (submit type and rating of all other equipment
exhausted through this stack or vent)
34. Stack flow rate: _________________ acfm Vertically restricted? Ƒ Yes Ƒ No
Emissions Calculations (PTE)
35. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ___________Lbs/hr ___________Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr ___________Tons/yr VOC ___________Lbs/hr ___________Tons/yr
CO2 ___________ Tons/yr CH4 ___________Tons/yr
N2O ___________Tons/yr
HAPs_________ Lbs/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.

✔
See individual emissions calculation sheets.
✔
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 19 Date ___________________________
Natural Gas Boilers and Liquid Heaters
Boiler Information
1. Boiler Manufacturer: ___________________________________________________________________________
2. Model Number: ______________________________ 3. Serial Number: _______________________________
4. Boiler Rating: _________________(10
6 Btu per Hour)
5. Operating Schedule: __________ hours per day __________ days per week ___________ weeks per year
6. Use: Ƒ steam: psig Ƒ hot water Ƒ other hot liquid: ________________________________
Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol
Ƒ Process Gas - H2S content in process gas __________ grain/100cu.ft.
7. Fuels:
Ƒ Fuel Oil - specify grade:Ƒ Other, specify: ______________________________________
Sulfur content % by weight Days per year during which unit is oil fired: ________________
Backup
Fuel Ƒ Diesel Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol Ƒ Other _________________
8. Is unit used to incinerate waste gas liquid stream? Ƒ yes Ƒ no
(Submit drawing of method of waste stream introduction to burners)
Gas Burner Information
9. Gas Burner Manufacturer: _____________________________________________________________________
10. No. of Burners: ______________________________ 11. Minimum rating per burner: _____________ cu. ft/hr
12. Average Load: _______% 13. Maximum rating per burner: ____________ cu. ft/hr
14. Performance Guarantee (ppm dry corrected to 3% Oxygen):
NOx: ______________ CO: ______________ Hydrocarbons: ______________
Ƒ Manual Ƒ Automatic on-off15. Gas burner mode of control:
Ƒ Automatic hi-low Ƒ Automatic full modulation
Oil Burner Information
16. Oil burner manufacturer:
17. Model: _______________ number of burners: _________________ Size number: _______________
18. Minimum rating per burner: _____________ gal/hr 19. Maximum rating per burner: ___________ gal/hr
Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Lochinvar
Model CHN0402
Total Lochinvar Model CHN0402 natural gas rating: 0.8 MMBtu/hr
24 752
✔
✔
✔
30 ppm
2;1 burner per boiler
TBD
Lochinvar Boilers - Model CHN0402 (Pre-Batch Storage)
Page 2 of 3
Form 11 - Natural Gas Boiler and Liquid Heater
(Continued)
Modifications for Emissions Reduction
20. Type of modification: Ƒ Low NOX Burner Ƒ Flue Gas Recirculation (FGR)
Ƒ Oxygen Trim Ƒ Other (specify) ______________________________________

For Low-NOX Burners
21. Burner Type: Ƒ Staged air Ƒ Staged fuel Ƒ Internal flue gas recirculation
Ƒ Ceramic Ƒ Other (specify): ___________________________________________________
22. Manufacturer and Model Number: _______________________________________________________________
23. Rating: ______________________ 106 BTU/HR 24. Combustion air blower horsepower: ____________
For Flue Gas Recirculation (FGR)
25. Type: Ƒ Induced Ƒ Forced Recirculation fan horsepower: ______________________________________
26. FGR capacity at full load: scfm %FGR
27. FGR gas temperature or load at which FGR commences: OF % load
28. Where is recirculation flue gas reintroduced? _______________________________________________________
For Oxygen Trim Systems
29. Manufacturer and Model Number: ________________________________________________________________
30. Recorder: Ƒ yes Ƒ no Describe: ____________________________________________________________
Stack or Vent Data
31. Inside stack diameter or dimensions ____________
Stack height above the ground ________________
Stack height above the building ________________
32. Gas exit temperature: ___________ OF
33. Stack serves: Ƒ this equipment only, Ƒ other equipment (submit type and rating of all other equipment
exhausted through this stack or vent)
34. Stack flow rate: _________________ acfm Vertically restricted? Ƒ Yes Ƒ No
Emissions Calculations (PTE)
35. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ___________Lbs/hr ___________Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr ___________Tons/yr VOC ___________Lbs/hr ___________Tons/yr
CO2 ___________ Tons/yr CH4 ___________Tons/yr
N2O ___________Tons/yr
HAPs_________ Lbs/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.

✔
See individual emissions calculation sheets.
✔
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 19 Date ___________________________
Natural Gas Boilers and Liquid Heaters
Boiler Information
1. Boiler Manufacturer: ___________________________________________________________________________
2. Model Number: ______________________________ 3. Serial Number: _______________________________
4. Boiler Rating: _________________(10
6 Btu per Hour)
5. Operating Schedule: __________ hours per day __________ days per week ___________ weeks per year
6. Use: Ƒ steam: psig Ƒ hot water Ƒ other hot liquid: ________________________________
Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol
Ƒ Process Gas - H2S content in process gas __________ grain/100cu.ft.
7. Fuels:
Ƒ Fuel Oil - specify grade:Ƒ Other, specify: ______________________________________
Sulfur content % by weight Days per year during which unit is oil fired: ________________
Backup
Fuel Ƒ Diesel Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol Ƒ Other _________________
8. Is unit used to incinerate waste gas liquid stream? Ƒ yes Ƒ no
(Submit drawing of method of waste stream introduction to burners)
Gas Burner Information
9. Gas Burner Manufacturer: _____________________________________________________________________
10. No. of Burners: ______________________________ 11. Minimum rating per burner: _____________ cu. ft/hr
12. Average Load: _______% 13. Maximum rating per burner: ____________ cu. ft/hr
14. Performance Guarantee (ppm dry corrected to 3% Oxygen):
NOx: ______________ CO: ______________ Hydrocarbons: ______________
Ƒ Manual Ƒ Automatic on-off15. Gas burner mode of control:
Ƒ Automatic hi-low Ƒ Automatic full modulation
Oil Burner Information
16. Oil burner manufacturer:
17. Model: _______________ number of burners: _________________ Size number: _______________
18. Minimum rating per burner: _____________ gal/hr 19. Maximum rating per burner: ___________ gal/hr
Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
Modine
HDS 30AS01
Total heater natural gas rating: 0.12 MMBtu/hr
24 7 52
✔
✔
✔
TBD
Small Heaters (Cast Cure Complex & MBC4)
Page 2 of 3
Form 11 - Natural Gas Boiler and Liquid Heater
(Continued)
Modifications for Emissions Reduction
20. Type of modification: Ƒ Low NOX Burner Ƒ Flue Gas Recirculation (FGR)
Ƒ Oxygen Trim Ƒ Other (specify) ______________________________________
For Low-NOX Burners
21. Burner Type: Ƒ Staged air Ƒ Staged fuel Ƒ Internal flue gas recirculation
Ƒ Ceramic Ƒ Other (specify): ___________________________________________________
22. Manufacturer and Model Number: _______________________________________________________________
23. Rating: ______________________ 10
6 BTU/HR 24. Combustion air blower horsepower: ____________
For Flue Gas Recirculation (FGR)
25. Type: Ƒ Induced Ƒ Forced Recirculation fan horsepower: ______________________________________
26. FGR capacity at full load: scfm %FGR
27. FGR gas temperature or load at which FGR commences: OF % load
28. Where is recirculation flue gas reintroduced? _______________________________________________________
For Oxygen Trim Systems
29. Manufacturer and Model Number: ________________________________________________________________
30. Recorder: Ƒ yes Ƒ no Describe: ____________________________________________________________
Stack or Vent Data
31. Inside stack diameter or dimensions ____________
Stack height above the ground ________________
Stack height above the building ________________
32. Gas exit temperature: ___________
OF
33. Stack serves: Ƒ this equipment only, Ƒ other equipment (submit type and rating of all other equipment
exhausted through this stack or vent)
34. Stack flow rate: _________________ acfm Vertically restricted? Ƒ Yes Ƒ No
Emissions Calculations (PTE)
35. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ___________Lbs/hr ___________Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr ___________Tons/yr VOC ___________Lbs/hr ___________Tons/yr
CO2 ___________ Tons/yr CH4 ___________Tons/yr
N2O ___________Tons/yr
HAPs_________ Lbs/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.
See individual emissions calculation sheets.
✔
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 19 Date ___________________________
Natural Gas Boilers and Liquid Heaters
Boiler Information
1. Boiler Manufacturer: ___________________________________________________________________________
2. Model Number: ______________________________ 3. Serial Number: _______________________________
4. Boiler Rating: _________________(10
6 Btu per Hour)
5. Operating Schedule: __________ hours per day __________ days per week ___________ weeks per year
6. Use: Ƒ steam: psig Ƒ hot water Ƒ other hot liquid: ________________________________
Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol
Ƒ Process Gas - H2S content in process gas __________ grain/100cu.ft.
7. Fuels:
Ƒ Fuel Oil - specify grade:Ƒ Other, specify: ______________________________________
Sulfur content % by weight Days per year during which unit is oil fired: ________________
Backup
Fuel Ƒ Diesel Ƒ Natural Gas Ƒ LPG Ƒ Butane Ƒ Methanol Ƒ Other _________________
8. Is unit used to incinerate waste gas liquid stream? Ƒ yes Ƒ no
(Submit drawing of method of waste stream introduction to burners)
Gas Burner Information
9. Gas Burner Manufacturer: _____________________________________________________________________
10. No. of Burners: ______________________________ 11. Minimum rating per burner: _____________ cu. ft/hr
12. Average Load: _______% 13. Maximum rating per burner: ____________ cu. ft/hr
14. Performance Guarantee (ppm dry corrected to 3% Oxygen):
NOx: ______________ CO: ______________ Hydrocarbons: ______________
Ƒ Manual Ƒ Automatic on-off15. Gas burner mode of control:
Ƒ Automatic hi-low Ƒ Automatic full modulation
Oil Burner Information
16. Oil burner manufacturer:
17. Model: _______________ number of burners: _________________ Size number: _______________
18. Minimum rating per burner: _____________ gal/hr 19. Maximum rating per burner: ___________ gal/hr
Page 1 of 3
Northrop Grumman Systems Corporation
Bacchus Works - Plant 1 NIROP Bacchus West
09/11/2023
AAON
RN-006-3-0-EB09-422
Air-handling unit: 0.04 MMBtu/hr
24 752
✔
TBD
Air Handling Unit (Cast Cure Complex)
Page 2 of 3
Form 11 - Natural Gas Boiler and Liquid Heater
(Continued)
Modifications for Emissions Reduction
20. Type of modification: Ƒ Low NOX Burner Ƒ Flue Gas Recirculation (FGR)
Ƒ Oxygen Trim Ƒ Other (specify) ______________________________________
For Low-NOX Burners
21. Burner Type: Ƒ Staged air Ƒ Staged fuel Ƒ Internal flue gas recirculation
Ƒ Ceramic Ƒ Other (specify): ___________________________________________________
22. Manufacturer and Model Number: _______________________________________________________________
23. Rating: ______________________ 10
6 BTU/HR 24. Combustion air blower horsepower: ____________
For Flue Gas Recirculation (FGR)
25. Type: Ƒ Induced Ƒ Forced Recirculation fan horsepower: ______________________________________
26. FGR capacity at full load: scfm %FGR
27. FGR gas temperature or load at which FGR commences: OF % load
28. Where is recirculation flue gas reintroduced? _______________________________________________________
For Oxygen Trim Systems
29. Manufacturer and Model Number: ________________________________________________________________
30. Recorder: Ƒ yes Ƒ no Describe: ____________________________________________________________
Stack or Vent Data
31. Inside stack diameter or dimensions ____________
Stack height above the ground ________________
Stack height above the building ________________
32. Gas exit temperature: ___________
OF
33. Stack serves: Ƒ this equipment only, Ƒ other equipment (submit type and rating of all other equipment
exhausted through this stack or vent)
34. Stack flow rate: _________________ acfm Vertically restricted? Ƒ Yes Ƒ No
Emissions Calculations (PTE)
35. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ___________Lbs/hr ___________Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr ___________Tons/yr VOC ___________Lbs/hr ___________Tons/yr
CO2 ___________ Tons/yr CH4 ___________Tons/yr
N2O ___________Tons/yr
HAPs_________ Lbs/hr (speciate)__________Tons/yr (speciate)
Submit calculations as an appendix. If other pollutants are emitted, include the emissions in the appendix.
See individual emissions calculation sheets.

Attachment 3: Emission Calculations

Emissions Summary by Equipment
PM10 PM2.5
NOx SO2 CO VOC Total HAPs CO2e
Emergency Generators 0.08 0.08 2.55 0.00 1.45 0.13 0.01 290.0
Natural Gas‐Fired Equipment 0.52 0.52 2.58 0.06 5.73 0.38 0.13 8,194
Material Use ‐ CCC ----- 1.85 0.14 -
Material Use ‐ FIN8 ----- 1.04 0.13 -
Mix Bowl Cleaning ‐ MBC4 ----- 2.33 - -
Fume Hoods ‐ FIN8 & MBC4 -----0.37 4.06E-06 -
Pre‐Mix Process ‐ 10A ----- 0.03 0.03 -
Fiberglass Cutting ‐ 17A 0.26 0.26 - - - 1.1E-04 1.1E-04 -
New Equipment Total 0.86 0.86 5.13 0.06 7.18 6.12 0.44 8,484
8504 Boiler Removal ‐0.82 ‐0.82 ‐3.44 ‐0.10 ‐9.03 ‐0.59 ‐0.20 ‐12,915
8504 Emergency Generator Removal ‐0.02 ‐0.02 ‐0.26 0.00 ‐0.06 ‐0.02 0.00 ‐9.62
Case Prep Activity Reduction -----‐2.00 --
Natural Gas Limit Reduction ‐0.37 ‐0.37 ‐4.78 ‐0.04 ‐4.12 ‐0.27 ‐0.09 ‐5,889
NET Project Emissions ‐0.35 ‐0.35 ‐3.35 ‐0.08 ‐6.02 3.24 0.14 ‐10,330
Equipment ton/yr
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HAP Emissions Summary (tons/yr)
Acetaldehy
de Acrolein Benzene
Ethyl
Benzene
Ethylene
Glycol
Formaldeh
yde Hexane
Maleic
Anhydride MDI MIBK
PAHs
(total)Propylene Toluene Xylenes
Emergency Generators 4.47E-05 1.40E-05 1.38E-03 ----1.40E-04 --------2.98E-04 4.94E-03 4.98E-04 3.42E-04
Natural Gas-Fired Equipment ----1.43E-04 ----5.12E-03 1.23E-01 ----------2.32E-04 --
Material Use - CCC ------------------------3.97E-02 1.03E-01
Material Use - FIN8 ------1.08E-02 6.73E-02 6.37E-03 ----3.50E-05 5.68E-03 ----9.64E-03 2.86E-02
Mix Bowl Cleaning - MBC4
Fume Hoods - FIN8 & MBC4 ----------------4.06E-06 ----------
Pre-Mix Process - 10A --------------2.72E-02 ------------
Fiberglass Cutting - 17A ------------------------1.07E-04 --
TOTAL 0.000 1.4E-05 0.002 0.011 0.067 0.012 0.123 0.027 3.9E-05 0.006 0.000 0.005 0.050 0.132
Equipment
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NOI Application
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Emergency Generators
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
0.08 0.08 2.55 0.00 1.45 0.13 0.008 290.0
Equipment List
Location MFR Model Size
Generator
Size
(kW)
Engine
Outputa
(hp)Fuel Type Tier Rating
MBC4 Cummins DFEJ 450 KW
(563 KVA)450 755 Diesel Tier 2
Cast Cure Complex Cummins C3000 D6e 3000 KW
(3750 KVA)3000 4309 Diesel Tier 2
Engine Tier Tier 2 Fuel Consumption (MMBtu/hr)35.4
Make and Models TBD Max hours per year 100
Total Output (hp)a 5,064 BSFC (Btu/hp-hr)c 7,000
NOx to NMHC+NOx ratiob 95%
Emissions Estimate
g/hp-hr lb/hp-hr lb/hr tpy
NOx 4.56 1.01E-02 e 50.91 2.55
PM 0.15 3.31E-04 e 1.67 0.08
PM10 0.15 3.31E-04 e 1.67 0.08
PM2.5 0.15 3.31E-04 e 1.67 0.08
CO 2.60 5.73E-03 e 29.03 1.45
VOC 0.24 5.29E-04 e 2.68 0.13
SO2 5.50E-03 1.21E-05 f 0.061 0.003
HAPS Reference lb/hr tpy
1.60E-01 8.02E-03
1,3-Butadiene g 1.39E-03 6.93E-05
Acetaldehyde g 8.93E-04 4.47E-05
Acrolein g 2.79E-04 1.40E-05
Benzene g 2.75E-02 1.38E-03
Formaldehyde g 2.80E-03 1.40E-04
Propylene g 9.89E-02 4.94E-03
Toluene g 9.96E-03 4.98E-04
Xylenes g 6.84E-03 3.42E-04
PAHs (Total)g 5.96E-03 2.98E-04
Naphthalene g 3.01E-03 1.50E-04
Acenaphthylene g 1.79E-04 8.97E-06
Acenaphthene g 5.03E-05 2.52E-06
Fluorene g 1.04E-03 5.18E-05
Phenanthrene g 1.04E-03 5.21E-05
Anthracene g 6.63E-05 3.31E-06
Fluoranthene g 2.70E-04 1.35E-05
Pyrene g 1.69E-04 8.47E-06
Benzo(a)anthracene g 5.96E-05 2.98E-06
Chrysene g 1.25E-05 6.26E-07
Benzo(b)fluoranthene g 3.51E-06 1.76E-07
Benzo(k)fluoranthene g 5.49E-06 2.75E-07
Benzo(a)pyrene g 6.66E-06 3.33E-07
Indeno(1,2,3-cd)pyrene g 1.33E-05 6.65E-07
Dibenz(a,h)anthracene g 2.07E-05 1.03E-06
Benzo(g,h,l)perylene g 1.73E-05 8.67E-07
2.79E-03
Estimated Emissions
ReferencePollutantc,d
1.68E-04
7.89E-05
3.75E-07
5.83E-07
4.89E-07
4.78E-06
1.68E-06
3.53E-07
9.91E-08
1.55E-07
Emissions Summary (ton/yr)
Emission Factor
(lb/MMBtu)
2.52E-05
7.88E-06
7.76E-04
Total HAPS
Tier 2 Emission Factors
3.91E-05
2.81E-04
1.93E-04
8.48E-05
5.06E-06
1.42E-06
2.92E-05
2.94E-05
1.87E-06
7.61E-06
1.88E-07
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Greenhouse Gases Reference lb/hr tpy
CO2 h 5,780 289.0
CH4 h 0.234 0.012
N2O h 0.047 0.002
CO2e h -290.0
Notes:
a - Per design specifications
b - CARB Emission Factors for CI Diesel Engines
(https://www.baaqmd.gov/~/media/Files/Engineering/policy_and_procedures/Engines/EmissionFactorsforDieselEngines.ashx)
c - EPA AP-42, Volume I, Fifth Edition, AP-42 3.4-1
d - Assumed PM = PM10 = PM2.5
g - EPA AP-42, Volume I, Fifth Edition - October 1996, Table 3.4-3 and Table 3.4-4, HAP Emission Factors For Large Uncontrolled Stationary Diesel Engines
h - 40 CFR 98 Subpart C, Table C-1 and C-2.; GWP from 40 CFR Part 98, Table A-1
Calculation:
See EPA AP-42, Chapter 3.4 and the Notes section on this tab.
Acronyms:
BSFC - brake-specific fuel consumption kW - kilowatt
GWP - global warming potential MMBtu - million British thermal units
lb/hr - pounds per hour NMHC - non-methane hydrocarbon
hp - horsepower tpy- tons per year
CO2 GWPh 1
1.34102 kW to hp Methane (CH4) GWPh 25
2.2046 lb/kg Nitrous Oxide (N2O) GWPh 298
453.592 g per lb
f - Sulfur content of Ultra Low Sulfur Diesel (15 ppm sulfur) and EPA AP-42, Volume I, Fifth Edition - October 1996, Table 3.4-1, Emission Factors for large
Stationary Diesel Engines; (EF = 8.09E-03 * sulfur %)
e - EPA Tier 2 standards for Nonroad Compression-Ignition Engines (EPA 420-P-04-009 Revised April 2004). See Note b (above) for
breakout of NOx and NMHC emissions.
Conversions
73.96
0.003
0.0006
-
Emission Factor
(kg/MMBtu)
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Natural Gas-Fired Equipment
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
0.52 0.52 2.58 0.06 5.73 0.38 0.129 8,194
Equipment List
Location Specific Building Process / System Capacity Make / Model Notes Count
Individual
MBH Btu/Hr MMBtu/hr MMSCF/hr
MBC4 2610 MBC4 Utility
Building
Boiler Heating Hot
Water 1,701 MBH Input Weil McLain -
Model 688
Two (2) boilers; Low
NOx with FGR 2 1,701 1,701,000 1.70 0.0017
SHIP6 SHIP 6 Utility
Building Boilers - HVAC 1,356 MBH Input Weil McLain -
Model 588
Two (2) boilers; Low
NOx with FGR 2 1,356 1,356,000 1.36 0.0013
FIN8 Finish 8 Utility
Building Boilers - HVAC 1,356 MBH Input Weil McLain -
Model 588
Two (2) boilers; Low
NOx with FGR 2 1,356 1,356,000 1.36 0.0013
Cast Cure Complex Cast Cure/ Control
House
Main Boilers HVAC +
Process - Boiler
Room
1,701 MBH Input Weil McLain -
Model 688
Three (3) Boilers; Low
NOx with FGR 3 1,701 1,701,000 1.70 0.0017
Cast Cure Complex Cast Cure/ Control
House
Pony Boilers Process
- Boiler Room 500 MBH Input Lochinvar - Model
PBN0502
Two (2) Boilers; Low
NOx 2 500 500,000 0.50 0.0005
2603 Prebatch
Storage Bldg #2
2603 Prebatch
Storage Bldg #2
Boilers Heating Hot
Water 399 MBH Input Lochinvar - Model
CHN0402
Two (2) boilers; Low
NOx 2 399 399,000 0.40 0.0004
MBC4 2610 MBC4 Utility
Building
Gas Fired Unit
Heaters 30 MBH Modine - Model
HDS 30AS01
Per Heater, Two (2)
Heaters 2 30 30,000 0.03 0.00003
Cast Cure Complex Control House Gas Fired Unit
Heaters 30 MBH Modine - Model
HDS 30AS01
Per Heater, Two (2)
Heaters 2 30 30,000 0.03 0.00003
Cast Cure Complex Control House AHU-Gas Fired Unit 35.6 MBH AAON - Mode RN-
006-3-0-EB09-422
One (1) air handling
unit 1 36 35,600 0.04 0.00003
Total Natural Gas Input (MMBtu/hr):15.88
Emissions Summary (ton/yr)
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NOI Application
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Maximum boiler size (MMBtu/hr)1.70 Max hours per year 8,760
Total Firing Rate, all equipment (MMBtu/hr)15.88 Heating Value of Natural Gas (MMBtu/MMscf)a 1,020
Total Natural Gas Usage, all equipment (MMscf/hr)0.0156 Sulfur Content of Natural Gas (gr/100 scf)b 0.3
CO2 GWPe 1
Total Firing Rate, all Low NOx boilers (MMBtu/hr)15.73 Methane (CH4) GWPe 25
Total Natural Gas Usage, all Low NOx boilers (MMscf/hr)0.0154 Nitrous Oxide (N2O) GWPe 298
Low NOx Burner (ppm)30
Low NOx Burner EF (lb/MMBtu)f 0.037
Total Firing Rate, small heaters & AHU (MMBtu/hr)0.16
Total Natural Gas Usage, small heaters and AHU (MMscf/hr)0.0002
Emissions Estimate
lb/MMscf Reference lb/hr tpy
Criteria and GHG Pollutants
NO x (lb/MMBtu) Low NOx 0.037 f 5.75E-01 2.52
NOx (lb/MMscf) heaters 100 c 1.53E-02 0.07
7.6 c,d 1.18E-01 0.52
7.6 c,d 1.18E-01 0.52
7.6 c 1.18E-01 0.52
0.90 c 1.40E-02 0.06
5.00E-04 c 7.79E-06 3.41E-05
5.50 c 8.56E-02 0.38
84.0 c 1.31E+00 5.73
120,017 e 1.87E+03 8,185
2.26 e 3.52E-02 0.15
0.23 e 3.52E-03 0.02
--e 1,871 8,194
lb/MMscf Reference lb/hr tpy
Total HAPs 2.94E-02 1.29E-01
2.10E-03 c 3.27E-05 1.43E-04
1.20E-03 c 1.87E-05 8.18E-05
0.075 c 1.17E-03 5.12E-03
1.80 c 2.80E-02 1.23E-01
6.10E-04 c 9.50E-06 4.16E-05
3.40E-03 c 5.29E-05 2.32E-04
2.40E-05 c 3.74E-07 1.64E-06
1.80E-06 c 2.80E-08 1.23E-07
1.60E-05 c 2.49E-07 1.09E-06
1.80E-06 c 2.80E-08 1.23E-07
1.80E-06 c 2.80E-08 1.23E-07
2.40E-06 c 3.74E-08 1.64E-07
1.80E-06 c 2.80E-08 1.23E-07
1.20E-06 c 1.87E-08 8.18E-08
1.80E-06 c 2.80E-08 1.23E-07
1.20E-06 c 1.87E-08 8.18E-08
1.80E-06 c 2.80E-08 1.23E-07
1.80E-06 c 2.80E-08 1.23E-07
1.20E-06 c 1.87E-08 8.18E-08
HAPs Continued -->
HAPs Emission Factors Total Emissions
Benzo(g,h,i)perylene
Benzo(k)fluoranthene
Chrysene
Dibenzo(a,h)anthracene
Acenaphthylene
Benz(a)anthracene
Benzo(a)pyrene
Benzo(b)fluoranthene
Pollutant
Toluene
2-Methylnaphthalene
7,12-Dimethylbenz(a)anthracene
Acenaphthene
3-Methylcholanthrene
Naphthalene
Dichlorobenzene
Formaldehyde
Hexane
Emission Factors
PM10
PM2.5
PM
SO2
Lead
VOC
CO
CO2
CH4
N2O
Total Emissions
CO2e
Benzene
Anthracene
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NOI Application
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lb/MMscf Reference lb/hr tpy
3.00E-06 c 4.67E-08 2.05E-07
2.80E-06 c 4.36E-08 1.91E-07
1.80E-06 c 2.80E-08 1.23E-07
1.70E-05 c 2.65E-07 1.16E-06
5.00E-06 c 7.79E-08 3.41E-07
2.00E-04 c 3.11E-06 1.36E-05
1.20E-05 c 1.87E-07 8.18E-07
1.10E-03 c 1.71E-05 7.50E-05
1.40E-03 c 2.18E-05 9.55E-05
8.40E-05 c 1.31E-06 5.73E-06
3.80E-04 c 5.92E-06 2.59E-05
2.60E-04 c 4.05E-06 1.77E-05
2.10E-03 c 3.27E-05 1.43E-04
2.40E-05 c 3.74E-07 1.64E-06
Notes:
a - Heat content of 1,020 MMBtu/MMscf obtained from AP-42 Chapter 1.4.
b - Sulfur content from USEPA's Resolution of "Natural Gas" and "Pipeline Natural Gas" Definition Issues , 6/12/2000
d - Conservatively assumes PM=PM10=PM2.5.
f - Based on the molar volume of natural gas (379.7 dscf/lb-mol) at 1 atm and 60 °F; 3% O2; 46.01 g/mol as NO2
Calculation:
See EPA AP-42, Chapter 1.4 and the Notes section on this tab.
Heaters and air-handling unit use AP-42 NOx emission factor
Acronyms:
FGR - flue gas recirculation MMBtu - million British thermal units
GWP - global warming potential MMscf - million standard cubic feet
lb/hr - pounds per hour ppm - parts per million
MBH - thousand Btu/hour tpy- tons per year
Mercury
Fluorene
Indeno(1,2,3-cd)pyrene
Phenanthrene
Pyrene
Arsenic
Fluoranthene
e - Emission factors from 40 CFR 98 Subpart C, Table C-1 and C-2. Emissions adjusted for Global Warming Potential (GWP) multipliers derived from 40 CFR Part 98,
Table A-1.
c - Emission factor from USEPA's Compilation of Air Pollutant Emission Factors (AP-42), Chapter 1.4, External Combustion Sources, Natural Gas Combustion (July 1998).
HAPs Emission Factors Total Emissions
Nickel
Selenium
Beryllium
Cadmium
Chromium (Total)
Cobalt
Manganese
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NOI Application
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Material Application - Cast Cure Complex (CCC)
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
----- 1.85 0.14 -
Toluene Xylenes
0.01 0.02
Process List
Location Proposed Increase (motors/yr)75
Cast Cure Complex Hours of Operation/yr 8,760 Casting motors 24/7
Emissions Estimate
Location Part Number Description
Proposed
Annual Quantity
Unit of
Measure
Specific
Gravity
VOC
%
Toluene
%
Xylene
%VOC Toluene Xylene
Cast Cure Complex 1733H Proprietary 41 gal 0.71 95.0%4.5%0.0%232 11 0
Cast Cure Complex 140 Proprietary 495 gal 0.79 100%0.0%0.0%3,261 0 0
Cast Cure Complex 230142-002 Proprietary 6,848 lb NA 3.0%1.0%3.0%205 68 205
Total (lbs/yr):3,699 79 205
Calculations:
lbs emitted, volume (V) based = [annual quantity, gal] x [specific gravity] x [8.34 lb/gal] x [VOC/HAP%]
lbs emitted, weight (W) based = [annual quantity, lb] x [% VOC/HAP]
Weight-based calculation
Acronyms:
lbs/yr - pounds per year
SDS - safety data sheet
8.34 lb/gal
Emissions Summary (ton/yr)
Use of materials containing VOCs
and/or HAPs
Process / System
HAPs Summary (lb/hr)
Conversions
lbs/yr% per SDS
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NOI Application
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Material Application - Finishing 8 (FIN8)
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
----- 1.04 0.13 -
MIBK Toluene Ethyl Benzene Xylenes Formaldehyde MDI Ethylene Glycol
1.30E-03 2.20E-03 2.47E-03 6.53E-03 1.45E-03 8.00E-06 1.54E-02
Process List
Location Proposed Increase (motors/yr)75
Hours of Operation/yr 8,760 Finishing operations 24/7
Emissions Estimate
Location Part Number Description
Unit of
Measure
Weight (W) or
Volume (V)
Volume (gal) or
Weight (lb)
Fraction
Proposed
Annual
Quantity Specific Gravity
VOC
%
MIBK
%
Toluene
%
Ethyl
Benzene
%
Xylene
%FORM
MDI
%
Ethylene
Glycol
%VOC MIBK Toluene
Ethyl
Benzene Xylene FORM MDI
Ethylene
Glycol
FIN8 S213253-002 Proprietary 200 mL V 0.053 7,277 1.35 13%21.5%563 ----- 0.07 -
FIN8 270118-001 Proprietary 1/2 PT V 0.075 2 0.91 97% 1.37 -------
FIN8 270118-002 Proprietary GAL V 1.00 3 0.91 97% 24.32 -------
FIN8 320059-001 Proprietary 10.25 fl oz can V 0.082 8 0.82 51%1%2% 2.35 -- 0.03 0.08 ---
FIN8 300088-001 Proprietary 24 fl oz CAN V 0.192 173 0.78 85%1% 184.40 - 2.17 -----
FIN8 S13072 Proprietary 800 mL total V 0.211 248 1.30 4% 24.29 -------
FIN8 M4614611AWN Proprietary 90 mL tube V 0.024 83 1.04 4%1% 0.66 - 0.09 -----
FIN8 TS10786-001 Proprietary fl oz V 0.008 248 0.81 90% 11.75 -------
FIN8 230023-001-500 Proprietary GAL V 1.00 4 1.01 0%--------
FIN8 230172-001 Proprietary GAL V 1.00 41 1.50 33%2% 167.71 11.35 ------
FIN8 TS12434-001 Proprietary GAL V 1.00 413 1.30 4.6%3% 205.73 ------ 134.17
FIN8 TS12493-001 Proprietary GAL V 1.00 165 1.44 5% 99.08 -------
FIN8 WLS 103-4 Proprietary OZ V 0.008 689 1.13 70%1% 35.35 ------ 0.50
FIN8 60010649 Proprietary PT V 0.150 283 1.80 6%2%2% 40.12 - 12.74 -- 12.74 --
FIN8 282048-006 Proprietary PT V 0.150 165 0.80 64%8%15% 105.11 -- 12.39 24.79 ---
FIN8 AMS-S-
8802TY1CLB-2 Proprietary PT V 0.150 165 1.38 4%2% 11.69 - 4.28 -----
FIN8 S323010-001 Proprietary QT V 0.250 5,363 1.02 1% 114.04 -------
lbs/yr
HAPs Summary (lb/hr)
Emissions Summary (ton/yr)
% per SDS
Process / System
Application of materials containing VOCs and/or
HAPsFIN8
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Emissions Estimate
Location Part Number Description
Unit of
Measure
Weight (W) or
Volume (V)
Volume (gal) or
Weight (lb)
Fraction
Proposed
Annual
Quantity Specific Gravity
VOC
%
MIBK
%
Toluene
%
Ethyl
Benzene
%
Xylene
%FORM
MDI
%
Ethylene
Glycol
%VOC MIBK Toluene
Ethyl
Benzene Xylene FORM MDI
Ethylene
Glycol
lbs/yr% per SDS
FIN8 S273012-003 Proprietary 117 g KIT W 0.258 495 3.15 44% 56.37 -------
FIN8 3142612 Proprietary 130 g tube W 0.287 25 1.10 11% 0.74 -------
FIN8 270159-001 Proprietary 309 g CAN W 0.681 347 0.76 73%2%7% 172.31 -- 4.72 16.52 ---
FIN8 270159-001 Proprietary 309 g CAN W 0.681 332 0.76 73%2%7% 164.93 -- 4.52 15.82 ---
FIN8 270158-001 Proprietary 5 lb kit W 5.0 462 1.67 4% 92.40 -------
FIN8 270157-001 Proprietary LB Kit W 1.0 545 1.50 2% 10.89 -------
Total (lbs/yr):2,088 11.35 19.27 21.66 57.21 12.74 0.07 134.67
Notes:Acronyms:
All FIN8 materials are hand-applied with a brush, roller, spatula, or caulk gun.lbs/yr - pounds per year
Metallic HAPs in materials are not emitted since they are hand-applied.FORM - formaldehyde
MDI emissions from Part S213253-002 are estimated in separate table following American Chemical Council guidance MDI - methylene diphenyl diisocyanate
Calculations: MIBK - methyl isobutyl ketone
lbs emitted, volume (V) based = [annual quantity, gal] x [specific gravity] x [8.34 lb/gal] x [VOC/HAP%]SDS - safety data sheet
lbs emitted, weight (W) based = [annual quantity, lb] x [% VOC/HAP]V - volume-based unit of measure
See MDI calculation sheet for MDI emission estimate W - weight-based unit of measure
8.34 lb/gal
Conversions
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MDI Calculations - Linked to Finishing 8 tab
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
-----3.50E-05 4E-05 -
Process List
Location
FIN8
Emissions Estimate - MDI Evaporation Losses
Variable Name Variable Value Units
Determine Vapor Pressure of 21.5% MDI in Material
Percent MDI % MDI in
material 21.5%%
Vapor pressure VP 5.42E-06 mmHg
Vapor pressure VP 7.1E-09 atm
Vapor pressure of MDI at
process temperature VP_MDI 1.5E-09 atm
Determine Ventilation Rate in Meters/Second
Flow rate fr 550 acfm
Roller surface area SA_roll 5.00 ft2
Ventilation Rate u 0.56 m/s
Tack-Free Time per Technical Data Sheet
Tack-free time tTF 750 seconds
Determine Exposed Surface Area
Roller Rate rr 2,465 ft2 x 24 hrs/day
Exposed surface area SA 5,498 m2
Other Information
Process temperature Tproc 68.00 F
Process temperature Tproc 293.15 K
Molecular weight of MDI MW 250.3
Usage Days per year 365 days
Conversion Convert lb to g 454 g
Determine Evaporation Loss
MDI Evaporation losses W 0.0871 gr/day
MDI Evaporation losses W 0.0701 lb/yr
MDI Evaporation losses W_per hr 8.0E-06 lb MDI/hr
Emissions Summary (ton/yr)
Source / Assumption
24/7 use
Conversion factor
1' x 5'; conservative estimate
12.5 minutes work time per
technical data sheet
Roll rate of 2465 ft/day
Room temp cure
Conversion
Assumed 1' x 5' area; with flow
rate at 550 acfm; matches with
a typical indoor air velocity of 1
to 3 ft/s
Ventilation Rate (u) = flow rate / surface area
HAPs Summary (lb/hr)
MDI
8.00E-06
SDS for Part S213253-002
MDI vapor pressure provided in
guidance document
Conversion: mmHg to atm
MDI evaporation losses for material used in Finishing 8
Process / System
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MDI Notes:Acronyms:
MDI evaporative losses linked to Finishing 8 material use table acfm - actual cubic feet per minute
MDI emissions estimated using the American Chemistry Council document:ft2 - square feet
MDI Emissions Reporting Guidelines for the Polyurethane Industry (May 2012)g - grams
lbs/yr - pounds per year
Calculations: m2 - square meters
MDI - 4,4' methylene diphenyl diisocyanate
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NOI Application
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Polymeric-MDI Calculations - Linked to Finishing 8 tab
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
-----1.08E-04 --
Process List
Location
FIN8
Emissions Estimate - PMDI Evaporation Losses
Variable Name Variable Value Units
Determine Vapor Pressure of 45% PMDI in Material
Percent Poly-MDI (PMDI)% PMDI in
material 66.5%%
Vapor pressure VP 5.42E-06 mmHg
Vapor pressure VP 7.1E-09 atm
Vapor pressure of MDI at
process temperature VP_MDI 4.7E-09 atm
Determine Ventilation Rate in Meters/Second
Flow rate fr 550 acfm
Roller surface area SA_roll 5.00 ft2
Ventilation Rate u 0.56 m/s
Tack-Free Time per Technical Data Sheet
Tack-free time tTF 750 seconds
Determine Exposed Surface Area
Roller Rate rr 2,465 ft2 x 24 hrs/day
Exposed surface area SA 5,498 m2
Other Information
Process temperature Tproc 68.00 F
Process temperature Tproc 293.15 K
Molecular weight of MDI MW 250.3
Usage Days per year 365 days
Conversion Convert lb to g 454 g
Determine Evaporation Loss
PMDI Evaporation losses W 0.2695 gr/day
PMDI Evaporation losses W 0.2167 lb/yr
PMDI Evaporation losses W_per hr 2.5E-05 lb PMDI/hr
Ventilation Rate (u) = flow rate / surface area
Emissions Summary (ton/yr)
Source / Assumption
SDS for Part S213253-002
Conservatively used MDI's VP
provided in guidance document.
PMDI VP is less than MDI's VP.
Conversion: mmHg to atm
PMDI evaporation losses for material used in Finishing 8
Process / System
Room temp cure
Conversion
Conservatively used MDI's MW
24/7 use
Conversion factor
1' x 5'; conservative estimate
Assumed 1' x 5' area; with flow
rate at 550 acfm; matches with
a typical indoor air velocity of 1
to 3 ft/s
12.5 minutes work time per
technical data sheet
Roll rate of 2465 ft/day
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PMDI Notes:Acronyms:
acfm - actual cubic feet per minute
ft2 - square feet
g - grams
lbs/yr - pounds per year
m2 - square meters
PMDI - Polymeric methylene diphenyl diisocyanate
PMDI evaporative losses linked to Finishing 8 material use table, VOCs
PMDI emissions estimated using the American Chemistry Council document:
MDI Emissions Reporting Guidelines for the Polyurethane Industry (May 2012)
Calculations:
The American Chemical Council's guidelines for the polurethane industry (ACC, 2012)
describes the isocyanic acid-polymers as a "polymeric MDI" or PMDI
PMDI follows the same reaction as 4,4 MDI, but it is not a HAP. Calculated similarly to 4,4'
MDI.
Part S213253-002 contains:
- 45% Isocyanic acid, polymethylenepolyphenylene ester, polymer with .alpha.-hydro-
.omega.-hydroxypoly[oxy(methyl-1,2-ethanediyl)]; CAS Number: 53862-89-8
and
- 21.5% Isocyanic acid, polymethylenepolyphenylene ester ; CAS Number: 9016-87-9
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Mix Bowl Cleaning - MBC4
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
----- 2.33 --
Process List
Location Proposed Increase (motors/yr)75
MBC4
Emissions Estimate - Mix Bowl Cleaning Emissions
Location Process Part Number Description
Mixing Bowl
Surface Area
(ft2)
Uncontrolled
Emission Factora
(lb/hr/ft2)
Number Bowls
Cleaned per
Year
Max Time
Solvent in
Bowl
(hr)
Hours of
Solvent Useb
(hrs/yr)
VOC
(lb/yr)
MBC4 Mix Bowl
Cleaning 140 Proprietary 235 0.08 330 0.75 248 4,653
Total (lbs/yr):4,653
Total (tons/yr):2.33
Notes:
a- EPA AP-42, Volume I, Fifth Edition, AP-42 4.6-2; Cold Cleaner, entire unit
b- Solvent present in mixing bowl for maximum of 0.75 hours per bowl cleaned.
Calculations:
Mix Bowl Cleaning -
Hours of Solvent Use, hr/yr = [# bowls cleaned per year] x [max time solvent in bowl, hr]
lbs emitted = [mixing bowl surface area, ft2] x [AP-42 Ch 4.6 emission factor, lb/hr/ft2] x [hours of solvent use, hr/yr]
Fume Hood Cleaning -
Acronyms:
ft2 - square feet
lbs/yr - pounds per year
tpy - tons per year
Emissions estimated using Chapter 8 of the Preferred and Alternative Methods for Estimating Air Emissions from Paint, Ink and Other
Coating Manufacturing Facilities
https://www.epa.gov/sites/default/files/2015-08/documents/ii08 feb2005.pdf
Emissions Summary (ton/yr)
Process / System
Use of solvent to clean mixing
bowls
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Fume Hoods - Finishing 8 (FIN8) and Mix Bowl Cleaning 4 (MBC4)
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
-----0.37 4.06E-06 -
Process List
Location Proposed Increase (motors/yr)75
Hours of Operation/yr 8,760
Emissions Estimate - Fume Hoods in FIN8
Location VOC / HAP Variable
Unit of
Measure Units
Mx 250.25 lb/lb-mole
Vp 1.3E-03 hPa
Vp 1.9E-05 psia
Px 4.2E-06 psia
D 0.54 ft
A (pi * r2)0.23 ft2
U ft/s 100 ft/sec
U 68.18 mi/hr
Kx 0.0491 ft/sec
H 0.25 hr/batch
B 4380 batches/yr
T 532 °R
R 10.73 psia-ft3/R-lb
mole
Ex_lb/yr 8.12E-03 lb/yr
Ex_lb/hr 9.27E-07 lb/hr
Ex_tpy 4.06E-06 ton/yr
Mx 43.03 lb/lb-mole
Vp 1.3E-03 hPa
Vp 1.9E-05 psia
Px 1.3E-05 psia
D 0.54 ft
A (pi * r2)0.23 ft2
U ft/s 100 ft/sec
U 68.18 mi/hr
Kx 0.0882 ft/sec
H 0.25 hr/batch
B 4380 batches/yr
T 532 °R
R 10.73 psia-ft3/R-lb
mole
Ex_lb/yr 7.82E-03 lb/yr
Ex_lb/hr 8.93E-07 lb/hr
Ex_tpy 3.91E-06 ton/yr
Emissions Summary (ton/yr)
Process / System
HAPs Summary (lb/hr)
FIN8
MBC 4
Materials containing VOCs and/or HAPs in fume
hoods
Operations
24/7
FIN8
FIN8 MDI
Variable Description
Molecular weight of MDI in Part Number S213253-
002
Vapor pressure of mixture
Conversion from hPa to psia
Temperature
Universal Gas Constant
Emissions, lb/yr
Universal Gas Constant
Emissions, lb/yr
Emissions, lb/hr
VOC Emissions, tpy
Mass Transfer Coefficient
Emissions, lb/hr
MDI
9.27E-07
Surface area of can
Wind speed
Wind speed; converted from 100 ft/s
MDI Emissions, tpy
Molecular weight of highest VOC in Part Number
S213253-002
Vapor pressure of mixture
Conversion from hPa to psia
Partial vapor pressure
Diameter of 1 gal can
Batch time; 15 minutes
Number of batches per year; 4 per shift
Partial vapor pressure
Diameter of 1 gal can
Surface area of can
Wind speed
Wind speed; converted from 100 ft/s
Mass Transfer Coefficient
Batch time; 15 minutes
Temperature
Number of batches per year; 4 per shift
VOC
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Emissions Estimate - Fume Hood in MBC4
Location VOC / HAP Variable
Unit of
Measure Units
Mx 804.88 lb/lb-mole
Vp 0.50 mmHg
Vp 0.010 psia
Px 0.010 psia
A (pi * r2)18 ft2
U ft/s 100 ft/sec
U 68.18 mi/hr
Kx 0.0332 ft/sec
H 0.75 hr/batch
B 330 batches/yr
T 528 °R
R 10.73 psia-ft3/R-lb
mole
Ex_lb/yr 731.9 lb/yr
Ex_lb/hr 2.96 lb/hr
Ex_tpy 0.37 ton/yr
Notes:
FIN8 fume hood batch emissions estimated for material with highest HAP content, Part Number S213253-002
MBC4 fume hood batch emissions estimated for Part 140. There are no HAPs in Part 140.
Calculations:
Surface Evaporation Emissions, Ex (lb/yr) (Eq. 8.4-22) = [Mx] x [Kx] x [A] x [Px] x 3600 x [H] x [B] / [R x T]
Acronyms:
lbs/yr - pounds per year
tpy = tons per year
MDI - methylene diphenyl diisocyanate
Where: Mx = molecular weight; Kx = mass transfer coefficient (ft/s); A = surface area (ft2), Px = partial vapor pressure (psia);
3600 sec/hr; H = batch time (hr); B = number of batches ; R = universal gas constant (psia-ft3/R-lb mole); T = temperature (R)
Emissions estimated using Chapter 8 of the Preferred and Alternative Methods for Estimating Air Emissions from Paint, Ink
and Other Coating Manufacturing Facilities
https://www.epa.gov/sites/default/files/2015-08/documents/ii08_feb2005.pdf
Mass Transfer Coefficient, Kx (ft/sec) (Eq. 8.4-21) = [0.00438] x [wind speed, mi/hr]^0.78 x [18/molecular weight]^(1/3)
Batch time to clean one bowl
Number of batches; same as number of bowls
VOC
Variable Description
Wind speed; converted from 100 ft/s
MBC4
Molecular weight of VOC in Part Number 140
Vapor pressure
Conversion from mmHg to psia
Partial vapor pressure = Vapor Pressure
Surface area in fume hood
Wind speed
Universal Gas Constant
Emissions, lb/yr
Emissions, lb/hr
VOC Emissions, tpy
Temperature
Mass Transfer Coefficient
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Pre-Mix Process - Building 10A
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
----- 0.03 0.03 -
Stack 1
Stack 2
Total
Process List
Location Proposed Increase (motors/yr)75
10A Stack 1 - Hours of Operation/yr 130
Stack 2 - Hours of Operation/yr 130
Emissions Estimate lbs/yr lbs/yr
Location Stack Part Number Description
Number
Batches
Required
(per yr)
Avg. MA Loss
Per Batch
(lbs)MA Emissions VOC Emissions
10A Stack 1 S273034 Maleic
Anhydride (MA)25 1.1 27.23 27.23
10A Stack 2 S273034 Maleic
Anhydride (MA)25 1.1 27.23 27.23
Total (lbs/yr):54.5 54.5
Notes:
MA loss estimated using mass balance.
Baseline MA PTE emissions assumed to be for 25 motors; NOI for 75 motors/year increase
MA emissions from 100 motors/year = 72.6 lbs/year of MA
Calculation:
lbs emitted = [MA loss per batch, lb] x [# batches per year]
Acronyms:
MA - maleic anhydride
lbs/yr - pounds per year
0.21
0.42
Two batches
made at a time;
over 5 hours
Emissions Summary (ton/yr)
Process / System
Pre-mix process
HAPs Summary (lb/hr)
Maleic Anhydride
0.21
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Fiberglass Cutting / Dust Collector - Building 17A
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
0.26 0.26 ---1.07E-04 1.07E-04 -
Equipment List
Make Filter Type
Eurovac EIII Industrial
Vacuum System
MERV 15; Polyester
Filters
PM Emissions Estimate
Make Filter Type
Flow Rate
(CFM)
Hours of
Operation
(hr/yr)
PM2.5
Emission rate
(gr/dscf)
PM10
Emission rate
(gr/dscf)
PM2.5
(lbs)
PM10
(lbs)
PM2.5
(tons)
PM10
(tons)
Eurovac EIII Industrial
Vacuum System
MERV 15; Polyester
Filters 880 8,760 0.0078 0.0078 517 517 0.26 0.26
MERV Filter Efficiency
gr/dscf Capture Efficiency MERV Rating Note gr/dscf
Capture
Efficiency MERV Rating Note gr/dscf
Capture
Efficiency
MERV
Rating Note
0.0136 20%11 Baseline 0.0136 70%11 Baseline 0.0160 85%11 Baseline
0.00476 85%15 Proposed 0.0109 90%15 Proposed 0.0144 95%15 Proposed
0.0078 Average
0.0078
VOC/HAPs Emissions Estimate
Material Parts
Weight
(lb/gal)Mix Ratio
Approx. Use
(pt/yr)
Approx. Use
(gal/yr)
VOC
%Toluene %
VOC
(lbs)
Toluene
(lbs)
VOC
(tons)
Toluene
(tons)
Part A (Accel)10.52 3 14 1.69 0.5%0.5%0.09 0.09 4E-05 4E-05
Part B (Base)11.10 2 9 1.13 1%1%0.12 0.12 6E-05 6E-05
Fiberglass Fabric -----<1%-neg.-neg.-
Total 0.21 0.21 0.0001 0.0001
Notes:
PM10 and PM2.5 emission factor based on the minimum efficiency provided for the smallest size range that is filtered.
Emission rate assumes baseline filtration is 0.016 grains/dscf.
PM2.5 is estimated to be 85% of the PM10 emission rate.
The MERV 15 emission rate is calculated using the increase in filtration efficiency for each size range based on MERV chart minimum efficiency (American Society of Heating, Refrigeration, and
Air Conditioning Engineers (ASHRAE), Standard 52.2) and the particle size efficiency for each size range.
Adhesive
Emissions Summary (ton/yr)
PM2.5 PM10
0.3-1.0 µm 1.0-3.0 µm 3.0-10.0 µm
HAPs Summary (lb/hr)
Toluene
0.00002
PM Emission Factor (gr/dscf):
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Removal - Emergency Generator - 8504
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
-0.02 -0.02 -0.26 0.00 -0.06 -0.02 -0.0004 -9.6
Equipment List
Location
Specific
Building MFR Install Date
Size
(kW)
Engine
Output
(hp)Fuel Type Tier Rating
8504 8504 Boiler
House Cummins 1989 125 168 Diesel N/A
Engine Tier N/A Fuel Consumption (MMBtu/hr)1.2
Make and Models TBD Max hours per year 100
Total Output (hp)168 BSFC (Btu/hp-hr)a 7,000
Emissions Estimate
lb/hr tpy
NOx a 5.21 0.26
PM a 0.37 0.02
PM10 a 0.37 0.02
PM2.5 a 0.37 0.02
CO a 1.12 0.06
VOC a 0.42 0.02
SO2 c 0.001 0.000
HAPS Reference lb/hr tpy
7.79E-03 3.89E-04
1,3-Butadiene d 4.60E-05 2.30E-06
Acetaldehyde d 9.02E-04 4.51E-05
Acrolein d 1.09E-04 5.44E-06
Benzene d 1.10E-03 5.49E-05
Formaldehyde d 1.39E-03 6.94E-05
Propylene d 3.03E-03 1.52E-04
Toluene d 4.81E-04 2.40E-05
Xylenes d 3.35E-04 1.68E-05
PAHs (Total)d 1.98E-04 9.88E-06
Naphthalene d 9.97E-05 4.99E-06
Acenaphthylene d 5.95E-06 2.98E-07
Acenaphthene d 1.67E-06 8.35E-08
Fluorene d 3.43E-05 1.72E-06
Phenanthrene d 3.46E-05 1.73E-06
Anthracene d 2.20E-06 1.10E-07
Fluoranthene d 8.95E-06 4.47E-07
Pyrene d 5.62E-06 2.81E-07
Benzo(a)anthracene d 1.98E-06 9.88E-08
Chrysene d 4.15E-07 2.08E-08
Benzo(b)fluoranthene d 1.17E-07 5.83E-09
Benzo(k)fluoranthene d 1.82E-07 9.11E-09
Benzo(a)pyrene d 2.21E-07 1.11E-08
Indeno(1,2,3-cd)pyrene d 4.41E-07 2.21E-08
Dibenz(a,h)anthracene d 6.86E-07 3.43E-08
Benzo(g,h,l)perylene d 5.75E-07 2.88E-08
3.10E-02
2.20E-03
2.20E-03
2.20E-03
6.68E-03
2.51E-03
5.83E-07
4.89E-07
1.68E-06
3.53E-07
9.91E-08
1.55E-07
1.88E-07
3.75E-07
4.78E-06
2.58E-03
4.09E-04
2.85E-04
1.68E-04
8.48E-05
5.06E-06
1.42E-06
2.92E-05
2.94E-05
1.87E-06
7.61E-06
1.18E-03
Emissions Summary (ton/yr)
Pollutantb
AP-42 Emission Factors
Reference
Estimated Emissions
Emission Factor
(lb/MMBtu)
3.08E-06
lb/hp-hr
Total HAPS
3.91E-05
7.67E-04
9.25E-05
9.33E-04
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Greenhouse Gases Reference lb/hr tpy
CO2 e 192 9.6
CH4 e 0.008 0.000
N2O e 0.002 0.000
CO2e e -9.6
Notes:
a - EPA AP-42, Volume I, Fifth Edition, AP-42 3.3-1
b - Assumed PM = PM10 = PM2.5
d - EPA AP-42, Volume I, Fifth Edition, Table 3.4-2, HAP Emission Factors
e - 40 CFR 98 Subpart C, Table C-1 and C-2.; GWP from 40 CFR Part 98, Table A-1
Calculation:
See EPA AP-42, Chapter 3.4 and the Notes section on this tab.
Acronyms:
BSFC - brake-specific fuel consumption kW - kilowatt
GWP - global warming potential MMBtu - million British thermal units
lb/hr - pounds per hour tpy- tons per year
hp - horsepower
CO2 GWPh 1
1.34102 kW to hp Methane (CH4) GWPh 25
2.2046 lb/kg Nitrous Oxide (N2O) GWPh 298
453.592 g per lb
-
c - Sulfur content of Ultra Low Sulfur Diesel (15 ppm sulfur) and EPA AP-42, Volume I, Fifth Edition - October 1996, Table 3.3-1, Emission Factors for
Gasoline and Diesel Industrial Engines; (EF = 2.05E-03 * sulfur %)
Conversions
Emission Factor
(kg/MMBtu)
73.96
0.003
0.0006
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Removal - Natural Gas Boiler - 8504
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
-0.82 -0.82 -3.44 -0.10 -9.03 -0.59 -0.20 -12,915
Equipment List - to be REMOVED
Location Specific Building Process / System Count MBH Btu/Hr MMBtu/hr MMSCF/hr
8504 8504 Boiler
House
Boiler Heating
Hot Water 1 42,000 42,000,000 42 0.0412
8504 Boiler - Low NOx with Flue Gas Recirculation
Natural Gas (MMscf/yr)215 Heating Value of Natural Gas (MMBtu/MMscf)a 1,020
8504 Natural Gas Usage (MMscf/hr)0.041 Sulfur Content of Natural Gas (gr/100 scf)b 0.3
8504 Hours per year 5,221 CO2 GWPe 1
Methane (CH4) GWPe 25
Firing Rate (MMBtu/yr)219,300 Nitrous Oxide (N2O) GWPe 298
Firing Rate (MMBtu/hr)42
Emissions Reduction Summary (ton/yr)
Capacity
(1) 42 MMBtu/hr nat gas boiler with
Low NOx burner and flue gas
recirculation
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8504 Emissions Estimate
lb/MMscf Reference lb/hr tpy
Criteria and GHG Pollutants
NOx 32 c 1.318 3.44
7.6 c,d 0.313 0.82
7.6 c,d 0.313 0.82
7.6 c 0.313 0.82
0.90 c 0.037 0.10
5.00E-04 c 0.000 5.38E-05
5.50 c 0.226 0.59
84.0 c 3.459 9.03
120,017 e 4,942 12,902
2.26 e 0.093 0.24
0.23 e 0.009 0.02
--e 4,947 12,915
lb/MMscf Reference lb/hr tpy
Total HAPs 7.77E-02 2.03E-01
2.10E-03 c 8.65E-05 2.26E-04
1.20E-03 c 4.94E-05 1.29E-04
0.075 c 3.09E-03 8.06E-03
1.80 c 7.41E-02 1.94E-01
6.10E-04 c 2.51E-05 6.56E-05
3.40E-03 c 1.40E-04 3.66E-04
2.40E-05 c 9.88E-07 2.58E-06
1.80E-06 c 7.41E-08 1.94E-07
1.60E-05 c 6.59E-07 1.72E-06
1.80E-06 c 7.41E-08 1.94E-07
1.80E-06 c 7.41E-08 1.94E-07
2.40E-06 c 9.88E-08 2.58E-07
1.80E-06 c 7.41E-08 1.94E-07
1.20E-06 c 4.94E-08 1.29E-07
1.80E-06 c 7.41E-08 1.94E-07
1.20E-06 c 4.94E-08 1.29E-07
1.80E-06 c 7.41E-08 1.94E-07
1.80E-06 c 7.41E-08 1.94E-07
1.20E-06 c 4.94E-08 1.29E-07
HAPs Continued -->
Pollutant
Total Emissions
Total Emissions
CH4
N2O
CO2e
SO2
Lead
VOC
CO
CO2
Benzene
Dichlorobenzene
Formaldehyde
HAPs
Emission Factors
PM10
PM2.5
PM
Emission Factors
Hexane
Naphthalene
Toluene
2-Methylnaphthalene
3-Methylcholanthrene
7,12-Dimethylbenz(a)anthracene
Acenaphthene
Acenaphthylene
Anthracene
Benz(a)anthracene
Benzo(a)pyrene
Benzo(b)fluoranthene
Benzo(g,h,i)perylene
Benzo(k)fluoranthene
Chrysene
Dibenzo(a,h)anthracene
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NOI Application
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lb/MMscf Reference lb/hr tpy
3.00E-06 c 1.24E-07 3.23E-07
2.80E-06 c 1.15E-07 3.01E-07
1.80E-06 c 7.41E-08 1.94E-07
1.70E-05 c 7.00E-07 1.83E-06
5.00E-06 c 2.06E-07 5.38E-07
2.00E-04 c 8.24E-06 2.15E-05
1.20E-05 c 4.94E-07 1.29E-06
1.10E-03 c 4.53E-05 1.18E-04
1.40E-03 c 5.76E-05 1.51E-04
8.40E-05 c 3.46E-06 9.03E-06
3.80E-04 c 1.56E-05 4.09E-05
2.60E-04 c 1.07E-05 2.80E-05
2.10E-03 c 8.65E-05 2.26E-04
2.40E-05 c 9.88E-07 2.58E-06
Notes:
a - Heat content of 1,020 MMBtu/MMscf obtained from AP-42 Chapter 1.4.
b - Sulfur content from USEPA's Resolution of "Natural Gas" and "Pipeline Natural Gas" Definition Issues , 6/12/2000
d - Conservatively assumes PM=PM10=PM2.5.
c - Emission factor from USEPA's Compilation of Air Pollutant Emission Factors (AP-42),Chapter 1.4, External Combustion Sources, Natural Gas
Combustion (July 1998).
e - Emission factors from 40 CFR 98 Subpart C, Table C-1 and C-2. Emissions adjusted for Global Warming Potential (GWP) multipliers derived from 40
CFR Part 98, Table A-1.
HAPs Emission Factors Total Emissions
Fluoranthene
Fluorene
Indeno(1,2,3-cd)pyrene
Phenanthrene
Pyrene
Arsenic
Mercury
Nickel
Selenium
Beryllium
Cadmium
Chromium (Total)
Cobalt
Manganese
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NOI Application
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Reduction - Natural Gas Limit
PM10 PM2.5 NOx SO2 CO VOC Total HAPs CO2e
-0.37 -0.37 -4.78 -0.04 -4.12 -0.27 -0.09 -5,889
Approval Order Limit - to be REDUCED
Reduction
MMBtu/yr
Reduction
MMBtu/hr
Reduction
MMSCF/hr
100,000 11.4 0.0112
Natural Gas (MMscf/yr)98 Hours per year 8,760
Natural Gas Reduction (MMscf/hr)0.011 Heating Value of Natural Gas (MMBtu/MMscf)a 1,020
Sulfur Content of Natural Gas (gr/100 scf)b 0.3
Estimated Low NOx Fraction 5%CO2 GWPe 1
Estimated Uncontrolled Fraction 95%Methane (CH4) GWPe 25
Nitrous Oxide (N2O) GWPe 298
Low NOx Fraction (MMscf/hr)0.0006
Uncontrolled Fraction (MMscf/hr)0.0106
Emissions Estimate - Reduction
lb/MMscf Reference lb/hr tpy
Criteria and GHG Pollutants
NO x Low NOx 50 c 0.028 0.12
NOx Uncontrolled 100 c 1.063 4.66
7.6 c,d 0.085 0.37
7.6 c,d 0.085 0.37
7.6 c 0.085 0.37
0.90 c 0.010 0.04
5.00E-04 c 0.000 2.45E-05
5.50 c 0.062 0.27
84.0 c 0.940 4.12
120,017 e 1,343 5,883
2.26 e 0.025 0.11
0.23 e 0.003 0.01
--e 1,345 5,889
Proposed Reduction
Reduce plant-wide natural gas limit by 100,000 MMBtu
/ 12-month period
Proposed NEW Limit: 633,000 / 12-month period
CO
CO2
CH4
N2O
CO2e
VOC
Emissions Reduction Summary (ton/yr)
Pollutant Emission Factors Total Emissions
Current Condition
Condition II.B.3.b:
Plant-wide natural gas limit
733,000 MMBtu / 12-month period
PM10
PM2.5
PM
SO2
Lead
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Emissions Estimate - Reduction
lb/MMscf Reference lb/hr tpy
Total HAPs 2.11E-02 9.25E-02
2.10E-03 c 2.35E-05 1.03E-04
1.20E-03 c 1.34E-05 5.88E-05
0.075 c 8.39E-04 3.68E-03
1.80 c 2.01E-02 8.82E-02
6.10E-04 c 6.83E-06 2.99E-05
3.40E-03 c 3.81E-05 1.67E-04
2.40E-05 c 2.69E-07 1.18E-06
1.80E-06 c 2.01E-08 8.82E-08
1.60E-05 c 1.79E-07 7.84E-07
1.80E-06 c 2.01E-08 8.82E-08
1.80E-06 c 2.01E-08 8.82E-08
2.40E-06 c 2.69E-08 1.18E-07
1.80E-06 c 2.01E-08 8.82E-08
1.20E-06 c 1.34E-08 5.88E-08
1.80E-06 c 2.01E-08 8.82E-08
1.20E-06 c 1.34E-08 5.88E-08
1.80E-06 c 2.01E-08 8.82E-08
1.80E-06 c 2.01E-08 8.82E-08
1.20E-06 c 1.34E-08 5.88E-08
3.00E-06 c 3.36E-08 1.47E-07
2.80E-06 c 3.13E-08 1.37E-07
1.80E-06 c 2.01E-08 8.82E-08
1.70E-05 c 1.90E-07 8.33E-07
5.00E-06 c 5.60E-08 2.45E-07
2.00E-04 c 2.24E-06 9.80E-06
1.20E-05 c 1.34E-07 5.88E-07
1.10E-03 c 1.23E-05 5.39E-05
1.40E-03 c 1.57E-05 6.86E-05
8.40E-05 c 9.40E-07 4.12E-06
3.80E-04 c 4.25E-06 1.86E-05
2.60E-04 c 2.91E-06 1.27E-05
2.10E-03 c 2.35E-05 1.03E-04
2.40E-05 c 2.69E-07 1.18E-06
Notes:
a - Heat content of 1,020 MMBtu/MMscf obtained from AP-42 Chapter 1.4.
b - Sulfur content from USEPA's Resolution of "Natural Gas" and "Pipeline Natural Gas" Definition Issues , 6/12/2000
d - Conservatively assumes PM=PM10=PM2.5.
Nickel
Selenium
Benzo(k)fluoranthene
Chrysene
Dibenzo(a,h)anthracene
Benzo(g,h,i)perylene
Naphthalene
Toluene
2-Methylnaphthalene
3-Methylcholanthrene
7,12-Dimethylbenz(a)anthracene
Acenaphthene
Acenaphthylene
c - Emission factor from USEPA's Compilation of Air Pollutant Emission Factors (AP-42),Chapter 1.4, External Combustion Sources, Natural Gas Combustion (July
1998).
e - Emission factors from 40 CFR 98 Subpart C, Table C-1 and C-2. Emissions adjusted for Global Warming Potential (GWP) multipliers derived from 40 CFR Part 98,
Table A-1.
Beryllium
Cadmium
Chromium (Total)
Cobalt
Manganese
Mercury
Fluoranthene
Fluorene
Indeno(1,2,3-cd)pyrene
Phenanthrene
Pyrene
Arsenic
Anthracene
Benz(a)anthracene
Benzo(a)pyrene
Benzo(b)fluoranthene
Emission Factors Total Emissions
Benzene
Dichlorobenzene
Formaldehyde
Hexane
HAPs
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Attachment 4: BACT Calculations

Number of operating hours per year (Ɵs)248 hours/year MBC4
Waste Gas Flow Rate (Q) 5,300
acfm (at atmospheric 
pressure and 77oF)
VOC Emission Rate (mvoc)18.80 lbs/hour
Electrical Requirement; Op (Qelec)12.6 KWh; with heat exhanger
Natural Gas Requirement; Op (Qgas)6.280 Therms; with heat 
exhanger
Catalytic Oxidizer Unit Cost $345,600
Install not included; Email quote 
from CMM Group Apr 2023
Electricity (Pelec)$0.0750 per kWh
Natural Gas (Pgas)$0.50 per therm
Operator Labor Rate $33.00 per hour
Maintenance Labor Rate $33.00 per hour
Annual Interest Rate (i) 0.01 No Interest*
If known, enter any additional costs for site preparation and building construction/modification:
Site Preparation (SP) =$3,456 1% of unit cost
Buildings (Bldg) =$0existing
Equipment Costs for auxiliary equipment (e.g., 
ductwork, dampers, and stack) (ECaux) =$3,456 1% of unit cost
Contingency Factor (CF) 10.0 percent*
Equipment Life 15.0 Years
Capital Recovery Factor (CRF)  [i × (1 + i)n] / [(1 + i)n ‐ 1]0.072
Estimated capital costs for a Catalytic Oxidizer with the following characteristics:
Destruction Efficiency:  95%
Total Capital Investment (TCI) 
Catalytic Oxidizer
Total System Cost $345,600
Auxiliary Equipment (ECaux) =(Based on design costs or estimated using 
methods provided in Section 2) $3,456
Total Purchased Equipment Costs for Catalytic 
Oxidizer = ECCO + ECaux =$349,056
Instrumentation = Included in Total System Cost $0
Sales taxes = 0.03 × A = $11,309
Freight = 0.05 × A = $18,849
$379,214
Installation Costs
Parameter Equation Cost
Foundations and Supports = 0.08 × B = $30,337
Handling and Erection = 0.14 × B = $53,090
Electrical = 0.04 × B = $15,169
Piping = 0.02 × B = $7,584
Insulation = 0.01 × B = $3,792
Painting = 0.01 × B = $3,792
Site Preparation (SP) =$3,456
Buildings (Bldg) =$0
Direct Installation Costs $117,220
Total Direct Costs (DC) = $496,435
Total Indirect Installation Costs (in  dollars)
Parameter Equation Cost
Engineering = 0.10 × B = $37,921
Construction and field expenses = 0.05 × B = $18,961
Contractor fees =Included in Total System Cost $0
Start‐up = Included in Total System Cost $0
Performance test =Estimated flat fee from previous projects $5,000
$61,882
Contingency Cost (C) = CF(IC+DC)=$55,832
Total Capital Investment (TCI) =DC + IC + C $614,149
Material Use ‐ Catalytic Oxidizer Capital Costs
Material Use ‐ Cost Estimate ‐ Catalytic Oxidizer
Data Inputs
*Northrop Grumman does not typically take out loans for equipment installations
Total Purchased Equipment Costs (B) = 
Total Indirect Costs (IC) =
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Direct Annual Costs
Parameter Equation Cost
Annual Electricity Cost (Op + Idle)QElec  × Pelec x Ɵs =$1,025
Annual Natural Gas Cost (Op + Idle)Qgas  × Pgas x Ɵs =$9,418
Operating Labor Costs: Operator = 0.5 hours/shift × Labor Rate × 
(Operating hours/8 hours/shift)$512
Supervisor = 15% of Operator $77
Maintenance Costs:Labor = 0.5 hours/shift × Labor Rate × 
(Operating Hours/8 hours/shift)$512
Materials = 100% of maintenance labor $512
Direct Annual Costs (DAC) = $12,055
Indirect Annual Costs
Parameter Equation Cost
Overhead
= 60% of sum of operator, supervisor, 
maintenance labor Plus maintenance 
materials
$967
Administrative Charges = 2% of TCI $12,283
Property Taxes = 1% of TCI $6,141
Insurance = 1% of TCI $6,141
Capital Recovery = CRFCATO × [TCI]$35,805
$61,337
Total Annual Cost  (TAC) = DAC + IAC  =$73,392
Cost Effectiveness 
Parameter Equation Cost
Total Annual Cost = TAC = $73,392 per year
Annual Quantity of VOC Removed =W voc  = m voc  x Ɵs x E =2.21 tons/year
Cost Effectiveness = Total Annual Cost (TAC) / Annual Quantity 
of VOC Removed/Recovered =$33,140 per ton
Material Use ‐ Catalytic Oxidizer Annual Costs
Indirect Annual Costs (IAC) =
Material Use ‐ Cost Effectiveness ‐ Catalytic Oxidizer
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Select the type of carbon adsorber system: 
For fixed‐bed carbon adsorbers, provide the following information:
Select the type of operation: 
Select the type of material used to fabricate the carbon adsorber vessels: 
Select the orientation for the adsorber vessels: 
Enter the design data for the proposed Carbon Canister Adsorber with Carbon Replacement
Number of operating hours per year (Ɵs) 248 hours/year
Waste Gas Flow Rate (Q)5,300 acfm**acfm is actual cubic feet/min
VOC Emission Rate (mvoc)18.80 lbs/hour
Required VOC removal efficiency (E) 98 percent** 98 percent is a default control efficiency. User should enter actual value, if known.
Superficial Bed Velocity (vb)75 ft/min Estimated; used value in EPA Guidance example problem
Estimated equipment life of adsorber vessels and auxiliary Equipment (n)15 Years** 15 years is a default equipment life. User should enter actual value, if known.
Estimated Carbon life (n)1 Years
Total Number of carbon beds (Ntotal)3 Beds** 3 beds is the default. User should enter actual number of beds, if known.
Estimated Carbon Replacement Rate (CRR) 379 lbs/hour** 379 lbs./hour is a default value. User should enter actual value, if known.
Carbon Canister Size 4100 lbs of carbon per canister quote from Carbtrol
Number of Operating Hours Before Carbon Canister Replacement  (ƟA) 8760 hours one change out per year, per Carbtrol
Enter the Characteristics of the VOC/HAP:
Name of VOC/HAP Acetone Used as representative for VOC solvent
Partial Pressure of Acetone in waste gas stream 0.0097 psia Vapor pressure of solvent per SDS
Parameter "k" for Acetone 0.412 Note:
Parameter "m" for Acetone 0.389 Typical values of "k" and "m" for some 
Enter the cost data for the carbon adsorber:
Desired dollar‐year 2023
CEPCI* for 2023 802.6 CEPCI value for 2023
Annual Interest Rate (i)0.1 percent (Current bank prime rate)
Carbon Canister Cost $92,465 per canister (in 2023 dollars) Note: Typical costs for carbon canisters are shown in Table B. Selected cost for 4100 lbs carbon.
Electricity (Pelec)$0.0676 per kWh** $0.0676/kWh is a default value. User should enter actual value, if known.
Steam (Ps)$5.00 per 1,000 lbs** $5.00/1,000 lbs is a default value. User should enter actual value, if known.
Cooling Water (Pcw)$3.55 per 1,000 gallons of water** $3.55/1,000 gallons is a default value. User should enter actual value, if known.
Operator Labor Rate $28.32 per hour 2023 BLS rate for 51‐8099
Maintenance Labor Rate $31.15 per hour Estimated as 110 percent of operator labor rate.
Carbon Cost (CC)$3.00 per lb Based on 2023 price
Disposal/Treatment Cost for Recovered VOC (Dvoc) $0.05 per lb
If known, enter any additional costs for site preparation and building construction/modification
Site Preparation (SP) =$0 * Default value. User should enter actual value, if known.
Buildings (Bldg) =$0 * Default value. User should enter actual value, if known.
Equipment Costs for auxiliary equipment (e.g., ductwork, dampers, and stack) 
(ECaux) =$32,000 Left as 2018 value
Contingency Factor (CF)10.0 percent** 10 percent is a default value. The contingency factor should be between 5 and 15 percent.
Mix Bowl Cleaning 4 ‐ Data Inputs
* CEPCI is the Chemical Engineering Plant Cost Index. The use of CEPCI in this spreadsheet is not an endorsement of the index for purpose of cost escalation or de‐escalation, but is there merely to allow for availability of a well‐known cost index to spreadsheet users. Use of other well‐known cost 
indexes (e.g., M&S) is acceptable.
assumed $100/ton
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Type of Carbon Adsorber: Carbon Canister Adsorber with Carbon Replacement
Name of VOC Controlled: Acetone Representive VOC
Parameter Equation Calculated Value Units
Quantity of Acetone Removed:
Quantity of Acetone Removed (Wvoc) =W voc  = m voc  x Ɵs x E =2.285 tons/year
Time required for Desorption (ƟD) =5 hours
Time for Adsorption (ƟA) =12 hours
Time Available for Desorption = ƟA (ND/NA) = 6 hours
Adsorber Parameters: 
Equilibrium Capacity at the Inlet (We(max)) =k x P m = 0.068 lb. VOC/lb. Carbon
Working Capacity (wc) = 0.5 x we(max) = 0.034 lb. VOC/lb. Carbon
Adjustment Factor for Adorber Vessel Material (F m ) =1.0  (* Stainless Steel, 304)     
Volumetric Flow Rate for each Vessel (Q') =Q/NA =2,650                                                                                             acfm/Bed
Carbon Bed Thickness (tb) = (Mc'/ρb)/(Q'/vb), where the density of carbon (ρb) = 30 lb/sq.ft 6.28                                                                                               ft. 
Pressure Drop (ΔPs) = tb x (0.03679vb +1.107x10‐4vb
2) + 1 =22.23 inches
Cooling Fan Operating Time (Ɵcf) = 0.4 x ƟD x  (NA x Ɵs)/ƟA = 83                                                                                                  hours
Estimated Carbon Required:
Estimated Carbon Consumption (Mc) for a continuously operated system = (mvoc/wc) x ƟA (1 + ND/NA)  = 9,983                                                                                             lbs.
Estimated Carbon Consumption (Mc) for an intermittently operated system = (mvoc/wc) x ƟA   = 6,655                                                                                             lbs.
Carbon Required for each Vessel (M c') =Mc /(NA + ND) =6,655                                                                                             lbs./Bed
Estimated Adsorber Vessel Dimensions and Surface Area: 
Vessel Orientation = Vertical
Vessel Diameter (D) =(0.127 x Mc' x vb)/Q' =23.92 ft.
Vessel Length (L) =(7.87/Mc') x (Q'/vb)2 = 1.48 ft.
Surface Area of Adsorber Vessel (S) = π x D x (L+D/2) =1010 sq.ft
The following design parameters for the carbon adsorber were calculated based on the values entered on the Data Inputs tab. These values were used to prepare the costs shown on the Cost Estimate 
tab.
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Electricity Consumption:
Electricity Consumed by the system fan (Q sf) = (0.746kW/hp) x 2.5x10‐4 x Q x ΔPs x Ɵs =5,450                                                                                             kWh/year
Electricity Consumed by the cooling fan (Q cf) = (0.746kW/hp) x 2.5x10‐4 x Qcf x ΔPs x Ɵcf =1,028                                                                                             kWh/year
Electricity Consumed by the Cooling Water Fan (Q cwf) = (0.746kW/hp) x [2.52x10‐4 x 100/η] x [Ɵcwp /(0.6 x ƟD x NA x ƟD/Ɵ 808                                                                                                kWh/year
Total Estimated Electricity Consumption (Q Elec) = Qsf + Qcf + Qcsf =7,287                                                                                             kWh/year
Steam Consumption:
Total Steam Consumption (Q Steam) = = 3.5 x Mvoc x Ɵs = 16,318                                                                                           lbs./year
Cooling Water Consumption:
Total Cooling Water Consumption (Q cw) = = 3.43 x Cs/Ps = 55,972                                                                                           gallons/year
Capital Recovery Factor:
[i × (1 + i)n] / [(1 + i)n ‐ 1] =0.0672
Where n = Equipment Life and i = Interest Rate
[i × (1 + i)n] / [(1 + i)n ‐ 1] =1.0010
Where n = Carbon Life and i = Interest Rate
Capital Recovery Factor for adsorber vessels and auxiliary equipment (CFRabsorber)=
Capital Recovery Factor for carbon (CRF Carbon) = 
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Estimated capital costs for a Carbon Canister Adsorber with Carbon Replacement with the following characteristics:
VOC Controlled/Recovered = Acetone
Adsorber Vessel Orientation =Vertical
Operating Schedule  = Intermittent Operation
Total Capital Investment (TCI) (in 2023 dollars)
Parameter Equation Cost
Costs for Each Carbon Adsorber Vessel (Cv) = 271 x Fm x S0.778 =$45,527
Total Cost for All Carbon Adsorber Vessels and Carbon(ECAdsorb) = 5.82 x Q‐0.133 x [Cc + (NA + ND) x Cv] =$309,802
Auxiliary Equipment (ECaux) =(Based on design costs or estimated using methods provided in Section 2) $32,000
Total Purchased Equipment Costs for Carbon Adsorber (A) == ECAdsorb + ECaux =$341,802
Instrumentation = 0.10 × A = Included in A
Sales taxes = 0.03 × A =$10,254
Freight = 0.05 × A =$17,090
$369,146
Direct Installation Costs (in 2023 dollars)
Parameter Equation Cost
Foundations and Supports = 0.08 × B =$29,532
Handling and Erection = 0.14 × B =$51,680
Electrical = 0.04 × B =$14,766
Piping = 0.02 × B =$7,383
Insulation = 0.01 × B =$3,691
Painting = 0.01 × B =$3,691
Site Preparation (SP) =$0
Buildings (Bldg) =$0
Total Direct Prep=$110,744
Total Direct Costs (DC) =  B + (0.3 × B) + SP + Bldg = $479,890
Total Indirect Installation Costs (in 2023 dollars)
Parameter Equation Cost
Engineering = 0.10 × B =$36,915
Construction and field expenses = 0.05 × B =$18,457
Contractor fees = 0.10 × B =$36,915
Start‐up = 0.02 × B =$7,383
Performance test = 0.01 × B =$3,691
$103,361
Contingency Cost (C) = CF(IC+DC)=$58,325
Total Capital Investment (TCI) =DC + IC + C = (1.28 × B) + SP + Bldg. + C = $641,576 in 2023 dollars
Mix Bowl Cleaning 4 ‐ Cost Estimate
Capital Costs
Total Purchased Equipment Costs (B) = 
Total Indirect Costs (IC) =
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Direct Annual Costs
Parameter Equation Cost
Annual Electricity Cost =QElec  × Pelec =$493
Annual Steam Cost (Cs) = 3.50 x mvoc x Ɵs x Ps =$82
Annual Cooling Water Cost (Ccs) = 3.43 x Cs/Ps x Pwc = $199
Operating Labor Costs: Operator = 0.5 hours/shift × Labor Rate × (Operating hours/8 hours/shift) $439
Supervisor = 15% of Operator $66
Maintenance Costs: Labor = 0.5 hours/shift × Labor Rate × (Operating Hours/8 hours/shift) $483
Materials = 100% of maintenance labor $483
Carbon Replacement Costs:Labor = CRFcarbon x (Labor Rate × Mc)/CRR = $548
Carbon = CRFcarbon x CC x Mc x 1.08 = $32,377
Direct Annual Costs (DAC) =$35,168 in 2023 dollars
Indirect Annual Costs
Parameter Equation Cost
Overhead
= 60% of sum of operator, supervisor, maintenance labor Plus maintenance 
materials $882
Administrative Charges = 2% of TCI $12,832
Property Taxes = 1% of TCI $6,416
Insurance = 1% of TCI $6,416
Capital Recovery = CRFAdsorber × (TCI ‐ [(1.08 x CC x M c) + (LR x Mc/CRR)] =$40,904
Indirect Annual Costs (IAC) =$67,450 in 2023 dollars
Recovered Solvent Credit/Disposal Costs
Disposal Cost
Parameter Equation Cost
VOC Disposal/Treatment Costs (Disposal cost )= m voc  x Ɵs  x D voc  x E =$228
 VOC Recovery Credit
Parameter Equation Cost
Annual Recovery Credit for Condensate (RC)= m voc  × Ɵs  x P voc  x E =$0
Total Annual Cost  (TAC) =DAC + IAC + C + DisposalCost ‐ RC  =$102,846 in 2023 dollars
Cost Effectiveness 
Parameter Equation Cost
Total Annual Cost = TAC =$102,846 per year in 2023 dollars
Annual Quantity of VOC Removed/Recovered =W voc  = m voc  x Ɵs x E =2.28 tons/year
Cost Effectiveness = Total Annual Cost (TAC) / Annual Quantity of VOC Removed/Recovered = $45,018 per ton of pollutants removed/recovered in 2023 
dollars
MBC4 ‐ Carbon Adsorber Cost Effectiveness
MBC4 ‐ Carbon Adsorber Annual Costs
Northrop Grumman Systems Corporation (NGSC)
Bacchus Works Site Page 5 of 5
NOI Application
Project Prime

Attachment 5: HAP Allocations

HAP Allocations
HAP CAS #
Proposed 
Allocation 
(tons/yr)
Current AO Limit
(tons / 12 mo)
GENERAL HAPs ‐‐1.99 24.90
1, bromopropane 106945 0.75
Ethylene Dichloride (1,2‐Dichloroethane) 107062 0.25
Chlorine 7782505 0.20
Formaldehyde 50000 0.10
2,4‐Toluene Diisocyanate 584849 0.98 0.98
4,4'‐Methylenedianiline 101779 0.25
Methylene Chloride (Dichloromethane) 75092 0.50
Glycol Ethers ‐‐0.25
Methylene Diphenyl Diisocyanate 101688 0.58
Methyl Chloroform (1,1,1‐Trichloroethane) 71556 1.00
Maleic anhydride 108316 0.25
Methanol 67561 1.00
Chromium Compounds 75456560 0.50
Methyl Isobutyl Ketone 108101 1.00
Hexamethylene‐1,6‐Diisocyanate 822060 1.00
Ethyl Benzene 100414 1.50
Hexane 110543 2.30
Toluene 108883 3.00
Hydrochloric acid 7647010 3.50
Xylenes (Isomers And Mixture) 1330207 4.00
24.90
Notes:
HAP ‐ hazardous air pollutant
Approval Order DAQE‐AN104020059‐22
TOTAL HAPs (General + Allocated)
Northrop Grumman Systems Corporation (NGSC)
Bacchus Works Site Page 1 of 1
NOI Application
Project Prime

Attachment 6: Air Quality Impact Analysis – Maleic Anhydride
Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb

1

Northrop Grumman Bacchus Facility Notice of Intent: Maleic Anhydride Air Dispersion
Modeling Report
Date: July 31, 2023 Jacobs Engineering Group Inc.
6440 South Millrock Drive, Suite 300
Holladay, Utah 84121
United States
T +1.385.474.8569
www.jacobs.com
Project name: Notice of Intent for Northrop Grumman Systems
Corporation – Project Prime
DAQE-AN104020059-22
Project no: D36150M1
Attention: Allia Abdallah / NGSC
Company: Northrop Grumman Systems Corporation
Prepared by: Jacobs Engineering Group Inc.

1. Introduction
Northrup Grumman Systems Corporation (NGSC) is submitting a Notice of Intent (NOI) application to
modify Approval Order (AO) DAQE- AN104020059-22 for its Bacchus Works facility (Facility) in West
Valley City, Utah. NGSC is proposing to increase rocket motor case production to approximately 100
motors per year in Building 10A (Proposed Project).
Discussions with the Utah Department of Air Quality (UDAQ) on May 3, 2023, confirmed an air dispersion
modeling analysis is required for maleic anhydride based upon NGSC explanation of maleic anhydride
emission estimates exceeding the Utah Administrative Code (UAC) R307-410-5 emission threshold value
(ETV). Net emission increases greater than the ETV must complete an air dispersion modeling analysis to
demonstrate the facility does not pose an unacceptable risk to public health. This modeling report was
prepared in support of the NOI and outlines the methodology and results of the modeling analysis for
maleic anhydride. Additional details regarding the process and emissions characterization can be found in
the NOI application.
Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb
2

2. Facility and Process Overview
The Bacchus Works facility is located in West Valley City, Utah in Salt Lake County. The Facility is located
along the West edge of the Salt Lake Valley, just East of the Rio Tinto Kennecott Copper Mine Property
within the foothills of the Oquirrh Mountains. The geography surrounding the Facility is complex with
significant terrain features to the West and South. The Universal Transverse Mercator (UTM) coordinates
for Building 10A are 409,452 meters East and 4,503,479 meters North in Zone 12, North American
Datum 1983. The facility location with Building 10A indicated is shown in Figure 2-1 below.

Figure 2-1. Facility Location

Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb
3

Building 10A is an existing building on NIROP where the pre-mix process occurs. The pre-mix process is a
batch process where solid maleic anhydride (HAP) briquettes are added to a non-volatile liquid in a sealed
reactor. The reactor is heated and sparged to evenly mix the maleic anhydride. During mixing, a small
amount of maleic anhydride partitions into the vapor phase and is emitted with the sparged air. No new
equipment will be installed in this building, but there will be an increase in production to meet the motor
demand.

As indicated in the NOI, maleic anhydride is the only hazardous air pollutant that exceeds the UAC R307-
410-5 Table 2 emission threshold values. Emissions for maleic anhydride modeling are based on an
operating schedule of 100 motors per year. A summary of the maleic anhydride emissions is presented in
Table 2-1 below.

Table 2-1 – Emissions Summary
Pollutant
Project Hourly
Emissions
(lbs/hr)
Project Annual
Emissions
(lbs/year)
UACR307-410-5
Emission Threshold
Value
(lbs/hr)
Maleic Anhydride 0.432 72.6 0.108 a
a Emission threshold value represents a vertically restricted release greater than 100 meters from the property boundary
lbs/hr = pound(s) per hour
lbs/year = pound(s) per year
Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb
4

3. Air Quality Dispersion Modeling Analysis
The following sections describe the air dispersion modeling methodology and source characterization.
3.1 Air Dispersion Modeling Methodology
The latest version of the American Meteorological Society/Environmental Protection Agency Regulatory
Model (AERMOD) (Version 22112) was used as recommended in the Environmental Protection Agency
(EPA) Appendix W, Guideline on Air Quality Models (EPA, 2017).
AERMOD is a steady-state plume model that simulates air dispersion based on planetary boundary layer
turbulence structure and scaling concepts, including treatment of both surface and elevated sources, and
both simple and complex terrain. This model is recommended for short-range (less than 50 kilometers
dispersion from the source. The model incorporates the Plume Rise Model Enhancement (PRIME)
algorithm for modeling building downwash. AERMOD is designed to accept input data prepared by two
specific preprocessor programs, AERMET and AERMAP. AERMOD was run with the following options:
• Direction specific building downwash
• Regulatory default options
• Rural dispersion characteristics
• Actual receptor elevations and hill height scales obtained from AERMAP (Version 18081)
UDAQ indicated that urban dispersion characteristics may be used with the URBAN option in AERMOD for
the facility, though this analysis conservatively assumes rural dispersion.
3.1.1 Meteorological Data
Five years of preprocessed surface and upper-air data were provided by UDAQ for the Salt Lake City
International Airport. The surface data was collected by the National Weather Service (NWS) at the Salt
Lake City International Airport (SLC) and represents the five-year meteorological period from January 1,
2016, to December 31, 2020. The dataset includes Automated Surface Observing System (ASOS) sub-
hourly data and upper-air data from the nearest upper-air monitoring station (Salt Lake City, Utah).
The predominate wind directions for this meteorological dataset are winds blowing from the north-
northwest and south-southeast. The average wind speed for the 5-year meteorological period (2016-
2020) is 3.84 meters per second. A wind rose for this meteorological dataset is depicted in Figure 3-1.
Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb
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Figure 3-1. UDAQ Salt Lake International Airport Meteorological Data Wind Rose, 2016 through 2020
3.1.2 Receptors
The ambient air boundary was defined based on parcel data provided to Jacobs; these data delineate what
areas are under NGSC ownership or within NGSC controlled access areas. Parcels owned by Northrop
Grumman are not considered ambient air and therefore had no receptors placed within them. Other
features such as publicly accessible roads and highways that run through NGSC-owned parcels were
considered ambient air and therefore receptors were placed within the parcels. The selection of receptors
in AERMOD for this analysis consisted of nested cartesian grids with the following spacing from the main
NGSC parcel:
 Discrete receptors every 25 meters around the ambient air boundary
 50-meter spacing from the ambient air boundary to 100 meters from the ambient air boundary
 100-meter spacing from the ambient air boundary to 3,000 meters from the ambient air boundary
 500-meter spacing from the ambient air boundary to 10,000 meters from the ambient air boundary

The ambient air boundary and receptor grid used in this modeling analysis are shown in Figure 3-2.
All receptors are expressed in the Universal Transverse Mercator North American Datum 1983, Zone 12
coordinate system. U.S. Geological Survey (USGS) National Elevation Dataset terrain data were used in
conjunction with the AERMAP preprocessor (Version 18081) to determine receptor elevations and terrain
maxima.
Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb
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Figure 3-2. Air Dispersion Modeling Analysis Reduced Receptor Grid
3.1.3 Building Downwash
Building downwash effects in AERMOD are applicable to the point source type and take into account stack
dimensions, building dimensions, and building elevations. Downwash affects were modeled using the
Building Profile Input Program (BPIP) with the Plume Rise Model Enhancements (PRIME) (Version 04274).
Figure 2-1 shows the location of the emission source, building, and fence line of the model.

3.2 Maleic Anhydride Modeling Methodology
Maleic anhydride is a listed hazardous air pollutant in Table 2 of UAC R307-410-5 with a chronic health
classification. The toxic screening level (TSL) for maleic anhydride developed by UDAQ is 13 µg/m3 for a
24-hour average concentration. A maximum modeled 24-hour average concentration that is less than the
TSL is considered in compliance with UDAQ acceptable levels, and no further action is required. This
modeling analysis estimates the Project 24-hour maleic anhydride average concentration for comparison
to the TSL.
Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb
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3.3 Source Characterization
The Project emissions are released through two stacks located near the Southwest corner of Building 10A.
The stacks are not equipped with rain caps or other obstructions at the stack termination. Therefore, they
were modeled as default point sources. Source parameters associated with the two stacks are presented in
Table 3-1.
Table 3-1. Source Parameters
Source
ID
X
Coord. a
Y
Coord. a
Base
Elevation
(m) b
Stack
Height
(m)
Release
Temp
(K)
Release
Velocity
(m/s)
Stack
Diameter
(m)
Maleic
Anhydride
Emission
Rate
(lbs/hr)
10A1 409,451.
4
4,503,47
0.4
1421.7 11.38 322 12 0.265 0.214
10A2 409,451.
8
4,503,47
0.0
1421.7 11.38 322 12 0.265 0.214
a Coordinates in UTM NAD83 Zone 12, meters
b Base elevations set equal to Building 10A elevation
m = meter(s)
K = Kelvin
m/s = meter(s) per second
lbs/hr = pound(s) per hour
4. Results and Conclusion
The modeled results from this analysis are presented below. Table 4-1 shows that the predicted impacts
for the Proposed Project are less than the TSL. Therefore, the maleic anhydride emissions from the
Proposed Project are in compliance with UAC R307-410-5.
Table 4-1. Air Dispersion Modeling Analysis Results
Pollutant Averaging Period Modeled Concentration
(µg/m3)
TSL
(µg/m3)
Exceeds TSL?
Maleic Anhydride 24-hr a 1.02 b 13 c No
a Modeled concentration represents the maximum 24-hour average concentration during the five modeled years (2016-2020).
b The maximum modeled 24-hour concentration occurs during 2017 meteorological data.
µg/m3 = microgram(s) per cubic meter
c UDAQ 2011 ACGIH Threshold Limit Values (TLVS), Toxic Screening Levels (TSLs) and Emission Threshold Values (ETVs)
Figure 4-1 illustrates the point of maximum impact for maleic anhydride 24-hour averaging period.
Modeling files associated with this analysis are available upon request.
Memorandum

Jacobs Engineering Group Inc.
230510090319_f0a713eb
8

Figure 4-1. Air Dispersion Modeling Analysis Points of Maximum Impact
References
U.S. Environmental Protection Agency (EPA). 2017. Appendix W of 40 CFR Part 51—Guideline On Air
Quality Models (Revised), Office of Air Quality Planning and Standards, Research Triangle Park, North
Carolina. January.