DAQ-2024-004461

DAQE-AN119950004-24

{{$d1 }}

Troy Allen
Allen Gravel LLC
1139 East 12700 North
Cove, UT 84320
[e-mail]

Dear Mr. Allen:

Re: Approval Order: Administrative Amendment to Approval Order DAQE-AN119950003-23 to
Include Stack Testing on the Diesel-Fueled Generator Engine
Project Number: N119950004

The attached Approval Order (AO) is issued pursuant to the Notice of Intent (NOI) received on
September 11, 2023. Allen Gravel LLC must comply with the requirements of this AO, all applicable
state requirements (R307), and Federal Standards.

The project engineer for this action is Mr. Tim DeJulis, 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. No public comments were received
on this action.

Sincerely,

{{$s }}

Bryce C. Bird
Director

BCB:TD:jg

cc: Bear River 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

January 8, 2024

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

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{{#d1=date1_es_:signer1:date:format(date, "mmmm d, yyyy")}}
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APPROVAL ORDER
DAQE-AN119950004-24 Administrative Amendment
to Approval Order DAQE-AN119950003-23 to Include Stack
Testing on the Diesel-Fueled Generator Engine

Prepared By
Mr. Tim DeJulis, Engineer
[phone]
[e-mail]

Issued to
Allen Gravel LLC - Cove Aggregate Processing Plant

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality

January 8, 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 .................................................................................................... 4
SECTION I: GENERAL PROVISIONS .................................................................................... 4
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 6
PERMIT HISTORY ................................................................................................................... 10
ACRONYMS ............................................................................................................................... 11

DAQE-AN119950004-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Allen Gravel LLC Allen Gravel LLC - Cove Aggregate Processing
Plant

Mailing Address Physical Address
1139 East 12700 North 1015 East 12600 North
Cove, UT 84320 Cove, UT 84320

Source Contact UTM Coordinates
Name Troy Allen 434,000 m Easting
Phone [phone],645,000 m Northing
Email [e-mail] Datum NAD83
UTM Zone 12

SIC code 1442 (Construction Sand & Gravel)

SOURCE INFORMATION
General Description
Allen Gravel LLC (AG) operates an aggregate pit in Cove, Cache County. Aggregate is harvested by
bulldozers or front-end loaders from the pit. Front-end loaders collect and take the aggregate to the
crushing/screening area of the pit. Crushers, dry screens, and wash (wet) screens process the aggregate.
The sized aggregate is stored on site. Sized aggregate and unprocessed aggregate are loaded into trucks
and taken to customers off-site. The plant will produce up to 600,000 tons of sized aggregate and
200,000 tons of unprocessed aggregate per year.

NSR Classification
Administrative Amendment

Source Classification
Located in Logan UT-ID PM2.5 NAA
Cache County
Airs Source Size: B

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), OOO: Standards of Performance for Nonmetallic Mineral Processing Plants
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
Title V (Part 70) Area Source
DAQE-AN119950004-24
Page 4

Project Description
This administrative amendment will incorporate testing requirements for the 750-kW diesel-fired
generator engine. 40 CFR 63 Subpart ZZZZ requires this generator engine, manufactured before 2006, to
have a stack test every 8,760 hours of operation or three (3) years, whichever is first, from the date of the
previous stack test.

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 0 1167.00
Carbon Monoxide 0 6.58
Nitrogen Oxides 0 17.86
Particulate Matter - PM10 0 10.32
Particulate Matter - PM2.5 0 10.32
Sulfur Dioxide 0 3.23
Volatile Organic Compounds 0 0.07

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Generic HAPs (CAS #GHAPS) 0 520
Change (TPY) Total (TPY)
Total HAPs 0 0.26

SECTION I: GENERAL PROVISIONS

I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in
the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions
refer to those rules. [R307-101]

I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.3 Modifications to the equipment or processes approved by this AO that could affect the
emissions covered by this AO must be reviewed and approved. [R307-401-1]

I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request.
Unless otherwise specified in this AO or in other applicable state and federal rules, records
shall be kept for a minimum of two (2) years. [R307-401-8]

DAQE-AN119950004-24
Page 5

I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators
shall, to the extent practicable, maintain and operate any equipment approved under this AO,
including associated air pollution control equipment, in a manner consistent with good air
pollution control practice for minimizing emissions. Determination of whether acceptable
operating and maintenance procedures are being used will be based on information available to
the Director which may include, but is not limited to, monitoring results, opacity observations,
review of operating and maintenance procedures, and inspection of the source. All
maintenance performed on equipment authorized by this AO shall be recorded. [R307-401-4]

I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

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

SECTION II: PERMITTED EQUIPMENT

II.A THE APPROVED EQUIPMENT

II.A.1 Cove Aggregate Processing Plant

II.A.2 One (1) Cone Crusher
Capacity: 150 tons per hour
NSPS Subpart OOO

II.A.3 One (1) Triple Deck Screen
Capacity: 350 tons per hour
Size: 6 x 20

II.A.4 One (1) Double Deck Screen
Capacity: 100 tons per hour
Size: 3 x 8

II.A.5 Two (2) Wash Screens
Includes: chip washer, rock washer, triple-deck screen, four-deck screen, sand screws, and
various conveyors and stackers

For informational purposes only.

II.A.6 Various Aggregate Processing Equipment
Conveyors, Feeders, and Stackers

II.A.7 One (1) Generator Engine
Rating: 750 kW
Fuel: Diesel
Emissions Control: Catalytic Converter
Manufactured in 2003
Refurbished in 2022
MACT Subpart ZZZZ

II.A.8 Various Mobile Equipment
Front-end Loaders, Bulldozers, & Excavators

DAQE-AN119950004-24
Page 6

SECTION II: SPECIAL PROVISIONS

II.B REQUIREMENTS AND LIMITATIONS

II.B.1 Plantwide Requirements:
II.B.1.a Unless otherwise specified in this AO, the owner/operator shall not allow visible emissions from
any source on site to exceed 20% opacity. [R307-401-8]

II.B.1.a.1 Unless otherwise specified in this AO, opacity observations of emissions from stationary sources
shall be conducted according to 40 CFR 60, Appendix A, Method 9. [R307-201-3]

II.B.2 Aggregate Production Plant:
II.B.2.a The owner/operator shall not produce more than the following:

A. 600,000 tons of sized aggregate per rolling 12-month period

B. 200,000 tons of aggregate removed from bank run and sold without processing
per rolling 12-month period.

[R307-401-8]

II.B.2.a.1 The owner/operator shall:

A. Determine aggregate production by weighing haul trucks when both empty and
full

B. Account for all aggregate materials produced prior to the aggregate materials
leaving the site

C. Record production on a daily basis

D. Use the production data to calculate a new rolling 12-month total by the 20th day
of each month using data from the previous 12 months

E. Keep production records for all periods when the plant is in operation.

[R307-401-8]

II.B.2.b The owner/operator shall not allow visible emissions from any crusher on site to exceed 12%
opacity. [40 CFR 60 Subpart OOO, R307-312-4, R307-401-8]

II.B.2.c The owner/operator shall not allow visible emissions from any screen on site to exceed 7%
opacity. [40 CFR 60 Subpart OOO, R307-312-4, R307-401-8]

II.B.2.d The owner/operator shall not allow visible emissions from any conveyor transfer point on site to
exceed 7% opacity. [40 CFR 60 Subpart OOO, R307-312-4, R307-401-8]

II.B.2.e The owner/operator shall not allow visible emissions from any conveyor drop point on site to
exceed 20% opacity. [R307-401-8]

DAQE-AN119950004-24
Page 7

II.B.2.f The owner/operator shall install water sprays at the following points to control fugitive
emissions:

A. All crushers

B. All screens

C. All conveyor transfer points.

[R307-401-8]

II.B.3 Crushers, Screens, and Conveyors subject to NSPS Subpart OOO:
II.B.3.a The owner/operator shall install water sprays on each crusher, screen, conveyor transfer point,
and conveyor drop point on site to control emissions. Water sprays shall operate as necessary to
prevent visible emissions from exceeding the opacity limits listed in this AO. [R307-401-8]

II.B.3.a.1 The owner/operator shall conduct monthly inspections of each crusher, screen, and conveyor
manufactured after April 22, 2008, to check that water is flowing to discharge spray nozzles in
the wet suppression system. [40 CFR 60 Subpart OOO]

II.B.3.a.2 The owner/operator shall maintain records of wet suppression system inspections according to 40
CFR 60 Subpart OOO. [40 CFR 60 Subpart OOO]

II.B.3.b The owner/operator shall conduct an initial performance test for all crushers, screens, and
conveyor transfer points on site within 60 days after achieving the maximum production rate but
not later than 180 days after initial startup. Performance tests shall meet the limitations specified
in Table 3 to Subpart OOO. [40 CFR 60 Subpart OOO]

II.B.3.b.1 Initial performance tests for fugitive emissions limits shall be conducted according to 40 CFR
60.675(c). The owner or operator may use methods and procedures specified in 40 CFR
60.675(e) as alternatives to the reference methods and procedures specified in 40 CFR 60.675(c).
[40 CFR 60 Subpart OOO]

II.B.3.b.2 The owner/operator shall keep and maintain records of the initial performance test for each
crusher, screen, and conveyor for the life of the equipment.
[40 CFR 60 Subpart OOO, R307-401-8]

II.B.4 Generator Engines:
II.B.4.a The owner/operator shall not allow visible emissions from the generator engine to exceed 20%
opacity. [R307-401-8]

II.B.4.b The owner/operator shall not operate the 750-kW generator engine for more than 2,500 hours per
rolling 12-month period. [R307-401-8]

II.B.4.b.1 The owner/operator shall:

A. Determine hours of operation with a supervisor monitoring and maintaining an
operations log

B. Record hours of operation each day

C. Use the hours of operation to calculate a new rolling 12-month total by the 20th
day of each month using data from the previous 12 months

D. Keep hours of operation records for all periods the plant is in operation.

[R307-401-8]

DAQE-AN119950004-24
Page 8

II.B.4.c The owner/operator shall install a generator engine with a catalytic converter controlling the
emission that is certified to meet the following emission rates:

Pollutant g/hp-hr
NOx 2.62 g/hp-hr
CO 2.38 g/hp-hr

[R307-401-8]

II.B.4.c.1 To demonstrate compliance with the emission rate, the owner/operator shall keep a record of the
manufacturer's certification of the emission rate. The record shall be kept for the life of the
equipment. [R307-401-8]

II.B.4.c.2 The owner/operator shall operate the catalytic converter in accordance with manufacturer
specifications and recommendations. [R307-401-8]

II.B.4.c.3 The owner/operator shall test and replace the catalytic converter catalyst in accordance with
manufacturer recommendations. Records of catalytic converter inspections and catalyst
replacements shall be kept for the life of the equipment. [R307-401-8]

II.B.4.d The owner/operator shall either:

A. Limit concentration of CO in the generator engine exhaust to 23 ppmvd or
less at 15 percent O2; or

B. Reduce CO emissions by 70 percent or more from the generator engine.

[40 CFR 63 Subpart ZZZZ]

II.B.4.d.1 Compliance Demonstration
To demonstrate compliance with the emission limitations above, the owner/operator shall
perform stack testing on the emissions unit according to the stack testing conditions contained in
this AO and in 40 CFR 63 Subpart ZZZZ. [R307-401-8]

II.B.4.d.2 Initial Test
The owner/operator shall conduct an initial stack test on the emission unit within 180 days after
startup of the emission unit. [R307-401-8]

II.B.4.d.3 Test Frequency
After the date of the most recent stack test of the emission unit, the owner/operator shall conduct
a stack test on the emission unit every 8,760 hours of operation or within three (3) years,
whichever comes first. After the date of the most recent stack test of the emission unit. The
Director may require the owner/operator to perform a stack test at any time. [R307-401-8]

II.B.5 Stack Testing Requirements
II.B.5.a The owner/operator shall conduct any stack testing required by this AO according to the
following conditions. [R307-401-8]

II.B.5.a.1 Notification
At least 30 days prior to conducting a stack test, the owner/operator shall submit a source test
protocol to the Director. The source test protocol shall include the items contained in R307-165-
3. If directed by the Director, the owner/operator shall attend a pretest conference.
[R307-165-3, R307-401-8]

II.B.5.a.2 Testing & Test Conditions
The owner/operator shall conduct testing according to the approved source test protocol and
according to the test conditions contained in R307-165-4. [R307-165-4, R307-401-8]

DAQE-AN119950004-24
Page 9

II.B.5.a.3 Access
The owner/operator shall provide Occupational Safety and Health Administration (OSHA)- or
Mine Safety and Health Administration (MSHA)-approved access to the test location.
[R307-401-8]

II.B.5.a.4 Reporting
No later than 60 days after completing a stack test, the owner/operator shall submit a written
report of the results from the stack testing to the Director. The report shall include validated
results and supporting information. [R307-165-5, R307-401-8]

II.B.5.a.5 Possible Rejection of Test Results
The Director may reject stack testing results if the test did not follow the approved source test
protocol or for a reason specified in R307-165-6. [R307-401-8]

II.B.5.a.6 Test Methods
When performing stack testing, the owner/operator shall use the appropriate EPA-approved test
methods as acceptable to the Director. Acceptable test methods for pollutants are listed below.
[R307-401-8]

II.B.5.a.7 Standard Conditions

A. Temperature - 68 degrees Fahrenheit (293 K)

B. Pressure - 29.92 in Hg (101.3 kPa)

C. Averaging Time - As specified in the applicable test method.

[40 CFR 60 Subpart A, 40 CFR 63 Subpart A, R307-401-8]

II.B.5.a.8 CO 40 CFR 60, Appendix A, Method 10 or other EPA-approved testing method as acceptable to
the Director. [R307-401-8]

II.B.5.b The owner/operator shall only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives) as
fuel in the engine. [R307-401-8]

II.B.5.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.
[40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.5.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. [40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.6 Haul Roads and Fugitive Dust Sources
II.B.6.a The owner/operator shall comply with a FDCP for control of all fugitive dust sources associated
with the aggregate process facility. An electronic FDCP can be completed through the Utah
DEQ Fugitive Dust Plan Permit Application Website. If a written FDCP is completed, it shall be
submitted to the Director, attention: Compliance Branch, for approval. [R307-401-8]

II.B.6.b The owner/operator shall comply with all applicable requirements of R307-309-5 for Fugitive
Emission and Fugitive Dust sources on site. [R307-309-5]

II.B.6.c The owner/operator shall not allow visible emissions from paved haul roads to exceed 10%
opacity. The owner/operator shall not allow visible emissions from the unpaved haul roads and
fugitive dust sources to exceed 20% opacity on site and 10% opacity at the property boundary.
[R307-309-5, R307-401-8]

DAQE-AN119950004-24
Page 10

II.B.6.c.1 Visible emission determinations for fugitive dust emissions from haul-road traffic and mobile
equipment in operational areas 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 1/2 vehicle length behind the vehicle and not less than 1/2 the height
of the vehicle. [R307-205-4]

II.B.6.d The total paved haul road shall be no less than 0.30 miles in length. [R307-401-8]

II.B.6.d.1 Compliance shall be determined through Global Positioning System (GPS) measurements or
aerial photographs. [R307-401-8]

II.B.6.e The owner/ operator shall sweep and spray clean the paved in-plant haul road as necessary to
maintain the listed opacity limits in this AO. [R307-401-8]

PERMIT HISTORY

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

Supersedes AO DAQE-AN119950003-23 dated June 8, 2023
Is Derived From NOI dated September 11, 2023

DAQE-AN119950004-24
Page 11

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-

RN119950004
December 19, 2023

Troy Allen
Allen Gravel LLC
1139 East 12700 North
Cove, UT 84320
[e-mail]

Dear Troy Allen,

Re: Engineer Review - Administrative Amendment:
Administrative Amendment to Approval Order DAQE-AN119950003-23 to Include Stack
Testing on the Diesel-Fueled Generator Engine.
Project Number: N119950004

The DAQ requests a company representative review and sign the attached Engineer Review (ER). This
ER identifies all applicable elements of the New Source Review (NSR) permitting program. Allen Gravel
LLC should complete this review within 10 business days of receipt.

Allen Gravel LLC should contact Mr. Tim DeJulis at [phone] if there are questions or concerns
with the review of the draft permit conditions. Upon resolution of your concerns, please email Mr. Tim
DeJulis at [e-mail] the signed cover letter. Upon receipt of the signed cover letter, the DAQ
will prepare an Approval Order (AO) for signature by the DAQ Director.

If Allen Gravel LLC does not respond to this letter within 10 business days, the project will move
forward without source concurrence. If Allen Gravel LLC has concerns that cannot be resolved and the
project becomes stagnant, the DAQ Director may issue an Order prohibiting construction.

Approval Signature _____________________________________________________________
(Signature & Date)

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

Kimberly D. Shelley Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird Director

State of Utah

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 1
UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION

Project Number N119950004
Owner Name Allen Gravel LLC
Mailing Address 1139 East 12700 North
Cove, UT, 84320

Source Name Allen Gravel LLC- Cove Aggregate Processing Plant
Source Location 1015 East 12600 North
Cove, UT 84320

UTM Projection 434,000 m Easting, 4,645,000 m Northing
UTM Datum NAD83
UTM Zone UTM Zone 12
SIC Code 1442 (Construction Sand & Gravel)

Source Contact Troy Allen
Phone Number [phone]
Email [e-mail]

Billing Contact Troy Allen
Phone Number [phone]
Email [e-mail]

Project Engineer Mr. Tim DeJulis, Engineer
Phone Number [phone]
Email [e-mail]

Notice of Intent (NOI) Submitted September 11, 2023
Date of Accepted Application September 12, 2023

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 2
SOURCE DESCRIPTION

General Description
Allen Gravel LLC (AG) operates an aggregate pit in Cove, Cache County. Aggregate is harvested
by bulldozers or front-end loaders from the pit. Front-end loaders collect and take the aggregate
to the crushing/screening area of the pit. Crushers, dry screens, and wash (wet) screens process
the aggregate. The sized aggregate is stored on site. Sized aggregate and unprocessed aggregate
are loaded into trucks and taken to customers off-site. The plant will produce up to 600,000 tons
of sized aggregate and 200,000 tons of unprocessed aggregate per year.

NSR Classification:
Administrative Amendment

Source Classification
Located in Logan UT-ID PM2.5 NAA
Cache County
Airs Source Size: B

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), OOO: Standards of Performance for Nonmetallic Mineral Processing Plants
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
Title V (Part 70) Area Source

Project Proposal
Administrative Amendment to Approval Order DAQE-AN119950003-23 to Include Stack
Testing on the Diesel-Fueled Generator Engine.

Project Description
This administrative amendment will incorporate testing requirements for the 750-kW diesel-fired
generator engine. 40 CFR 63 Subpart ZZZZ requires this generator engine, manufactured before
2006, to have a stack test every 8,760 hours of operation or three (3) years, whichever is first,
from the date of the previous stack test.

EMISSION IMPACT ANALYSIS
Emissions will remain unchanged as a result of the administrative amendment; therefore, modeling is not
required at this time. [Last updated October 10, 2023]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 3
SUMMARY OF EMISSIONS

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

Criteria Pollutant Change (TPY) Total (TPY)
CO2 Equivalent 0 1167.00
Carbon Monoxide 0 6.58
Nitrogen Oxides 0 17.86
Particulate Matter - PM10 0 10.32
Particulate Matter - PM2.5 0 10.32
Sulfur Dioxide 0 3.23
Volatile Organic Compounds 0 0.07

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Generic HAPs (CAS #GHAPS) 0 520
Change (TPY) Total (TPY)
Total HAPs 0 0.26

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

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 4
Review of BACT for New/Modified Emission Units

1. BACT review regarding Process Equipment
This is an administrative amendment; therefore, a BACT analysis is not required. [Last updated
October 10, 2023]

SECTION I: GENERAL PROVISIONS

The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the
AO. (New or Modified conditions are indicated as “New” in the Outline Label):

I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in
the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions
refer to those rules. [R307-101]

I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.3 Modifications to the equipment or processes approved by this AO that could affect the
emissions covered by this AO must be reviewed and approved. [R307-401-1]

I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request.
Unless otherwise specified in this AO or in other applicable state and federal rules, records
shall be kept for a minimum of two (2) years. [R307-401-8]

I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators
shall, to the extent practicable, maintain and operate any equipment approved under this AO,
including associated air pollution control equipment, in a manner consistent with good air
pollution control practice for minimizing emissions. Determination of whether acceptable
operating and maintenance procedures are being used will be based on information available
to the Director which may include, but is not limited to, monitoring results, opacity
observations, review of operating and maintenance procedures, and inspection of the source.
All maintenance performed on equipment authorized by this AO shall be recorded. [R307-
401-4]

I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

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

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 5
SECTION II: PERMITTED EQUIPMENT
The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the
AO. (New or Modified conditions are indicated as “New” in the Outline Label):

II.A THE APPROVED EQUIPMENT

II.A.1 Cove Aggregate Processing Plant

II.A.2 One (1) Cone Crusher
Capacity: 150 tons per hour
NSPS Subpart OOO

II.A.3 One (1) Triple Deck Screen
Capacity: 350 tons per hour
Size: 6 x 20

II.A.4 One (1) Double Deck Screen
Capacity: 100 tons per hour
Size: 3 x 8

II.A.5 Two (2) Wash Screens
Includes: chip washer, rock washer, triple-deck screen, four-deck screen, sand screws, and
various conveyors and stackers

For informational purposes only.

II.A.6 Various Aggregate Processing Equipment
Conveyors, Feeders, and Stackers

II.A.7 One (1) Generator Engine
Rating: 750 kW
Fuel: Diesel
Emissions Control: Catalytic Converter
Manufactured in 2003
Refurbished in 2022
MACT Subpart ZZZZ

II.A.8 Various Mobile Equipment
Front-end Loaders, Bulldozers, & Excavators

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 6
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 Plantwide Requirements:
II.B.1.a
NEW
Unless otherwise specified in this AO, the owner/operator shall not allow visible emissions
from any source on site to exceed 20% opacity. [R307-401-8]

II.B.1.a.1 Unless otherwise specified in this AO, opacity observations of emissions from stationary
sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. [R307-201-3]

II.B.2 Aggregate Production Plant:
II.B.2.a The owner/operator shall not produce more than the following:

A. 600,000 tons of sized aggregate per rolling 12-month period

B. 200,000 tons of aggregate removed from bank run and sold without processing per
rolling 12-month period.

[R307-401-8]

II.B.2.a.1 The owner/operator shall:

A. Determine aggregate production by weighing haul trucks when both empty and full.

B. Account for all aggregate materials produced prior to the aggregate materials leaving
the site.

C. Record production on a daily basis.

D. Use the production data to calculate a new rolling 12-month total by the 20th day of
each month using data from the previous 12 months.

E. Keep production records for all periods when the plant is in operation.

[R307-401-8]

II.B.2.b
NEW
The owner/operator shall not allow visible emissions from any crusher on site to exceed 12%
opacity. [40 CFR 60 Subpart OOO, R307-312-4, R307-401-8]

II.B.2.c
NEW
The owner/operator shall not allow visible emissions from any screen on site to exceed 7%
opacity. [40 CFR 60 Subpart OOO, R307-312-4, R307-401-8]

II.B.2.d
NEW
The owner/operator shall not allow visible emissions from any conveyor transfer point on site
to exceed 7% opacity. [40 CFR 60 Subpart OOO, R307-312-4, R307-401-8]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 7
II.B.2.e
NEW
The owner/operator shall not allow visible emissions from any conveyor drop point on site to
exceed 20% opacity. [R307-401-8]

II.B.2.f The owner/operator shall install water sprays at the following points to control fugitive
emissions:

A. All crushers

B. All screens

C. All conveyor transfer points.

[R307-401-8]

II.B.3 Crushers, Screens, and Conveyors subject to NSPS Subpart OOO:
II.B.3.a
NEW
The owner/operator shall install water sprays on each crusher, screen, conveyor transfer point,
and conveyor drop point on site to control emissions. Water sprays shall operate as necessary
to prevent visible emissions from exceeding the opacity limits listed in this AO. [R307-401-8]

II.B.3.a.1
NEW
The owner/operator shall conduct monthly inspections of each crusher, screen, and conveyor
manufactured after April 22, 2008 to check that water is flowing to discharge spray nozzles in
the wet suppression system. [40 CFR 60 Subpart OOO]

II.B.3.a.2
NEW
The owner/operator shall maintain records of wet suppression system inspections according to
40 CFR 60 Subpart OOO. [40 CFR 60 Subpart OOO]

II.B.3.b The owner/operator shall conduct an initial performance test for all crushers, screens, and
conveyor transfer points on site within 60 days after achieving the maximum production rate
but not later than 180 days after initial startup. Performance tests shall meet the limitations
specified in Table 3 to Subpart OOO. [40 CFR 60 Subpart OOO]

II.B.3.b.1 Initial performance tests for fugitive emissions limits shall be conducted according to 40 CFR
60.675(c). The owner or operator may use methods and procedures specified in 40 CFR
60.675(e) as alternatives to the reference methods and procedures specified in 40 CFR
60.675(c). [40 CFR 60 Subpart OOO]

II.B.3.b.2 The owner/operator shall keep and maintain records of the initial performance test for each
crusher, screen, and conveyor for the life of the equipment. [40 CFR 60 Subpart OOO, R307-
401-8]

II.B.4 Generator Engines:
II.B.4.a The owner/operator shall not allow visible emissions from the generator engine to exceed 20%
opacity. [R307-401-8]

II.B.4.b The owner/operator shall not operate the 750-kW generator engine for more than 2,500 hours
per rolling 12-month period. [R307-401-8]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 8
II.B.4.b.1
NEW
The owner/operator shall:

A. Determine hours of operation with a supervisor monitoring and maintaining an
operations log

B. Record hours of operation each day

C. Use the hours of operation to calculate a new rolling 12-month total by the 20th day
of each month using data from the previous 12 months

D. Keep hours of operation records for all periods the plant is in operation. [R307-401-8]

II.B.4.c
NEW
The owner/operator shall install a generator engine with a catalytic converter controlling the
emission that is certified to meet the following emission rates:

Pollutant g/hp-hr
NOx 2.62
CO 2.38

[R307-401-8]

II.B.4.c.1
NEW
To demonstrate compliance with the emission rate, the owner/operator shall keep a record of
the manufacturer's certification of the emission rate. The record shall be kept for the life of
the equipment. [R307-401-8]

II.B.4.c.2
NEW
The owner/operator shall operate the catalytic converter in accordance with manufacturer
specifications and recommendations. [R307-401-8]

II.B.4.c.3
NEW
The owner/operator shall test and replace the catalytic converter catalyst in accordance with
manufacturer recommendations. Records of catalytic converter inspections and catalyst
replacements shall be kept for the life of the equipment. [R307-401-8]

II.B.4.d
NEW
The owner/operator shall either:

A. Limit concentration of CO in the generator engine exhaust to 23 ppmvd or
less at 15 percent O2; or

B. Reduce CO emissions by 70 percent or more from the generator engine

The owner/operator shall either:

A. Limit concentration of CO in the generator engine exhaust to 23 ppmvd or
less at 15 percent O2; or

B. Reduce CO emissions by 70 percent or more from the generator engine.

[40 CFR 63 Subpart ZZZZ]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 9
II.B.4.d.1
NEW
Compliance Demonstration
To demonstrate compliance with the emission limitations above, the owner/operator shall
perform stack testing on the emissions unit according to the stack testing conditions contained
in this AO and in 40 CFR 63 Subpart ZZZZ. [R307-401-8]

II.B.4.d.2
NEW
Initial Test
The owner/operator shall conduct an initial stack test on the emission unit within 180 days
after startup of the emission unit. [R307-401-8]

II.B.4.d.3
NEW
Test Frequency
After the date of the most recent stack test of the emission unit, the owner/operator shall
conduct a stack test on the emission unit every 8,760 hours of operation or within three (3)
years, whichever comes first. after the date of the most recent stack test of the emission unit.
The Director may require the owner/operator to perform a stack test at any time. [R307-401-8]

II.B.5
NEW
Stack Testing Requirements
II.B.5.a
NEW
The owner/operator shall conduct any stack testing required by this AO according to the
following conditions. [R307-401-8]

II.B.5.a.1
NEW
Notification
At least 30 days prior to conducting a stack test, the owner/operator shall submit a source test
protocol to the Director. The source test protocol shall include the items contained in R307-
165-3. If directed by the Director, the owner/operator shall attend a pretest conference. [R307-
165-3, R307-401-8]

II.B.5.a.2
NEW
Testing & Test Conditions
The owner/operator shall conduct testing according to the approved source test protocol and
according to the test conditions contained in R307-165-4. [R307-165-4, R307-401-8]

II.B.5.a.3
NEW
Access
The owner/operator shall provide Occupational Safety and Health Administration (OSHA)- or
Mine Safety and Health Administration (MSHA)-approved access to the test location. [R307-
401-8]

II.B.5.a.4
NEW
Reporting
No later than 60 days after completing a stack test, the owner/operator shall submit a written
report of the results from the stack testing to the Director. The report shall include validated
results and supporting information. [R307-165-5, R307-401-8]

II.B.5.a.5
NEW
Possible Rejection of Test Results
The Director may reject stack testing results if the test did not follow the approved source test
protocol or for a reason specified in R307-165-6. [R307-401-8]

II.B.5.a.6
NEW
Test Methods
When performing stack testing, the owner/operator shall use the appropriate EPA-approved
test methods as acceptable to the Director. Acceptable test methods for pollutants are listed
below. [R307-401-8]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 10
II.B.5.a.7
NEW
Standard Conditions
A. Temperature - 68 degrees Fahrenheit (293 K)

B. Pressure - 29.92 in Hg (101.3 kPa)

C. Averaging Time - As specified in the applicable test method.

[40 CFR 60 Subpart A, 40 CFR 63 Subpart A, R307-401-8]

II.B.5.a.8
NEW
CO 40 CFR 60, Appendix A, Method 10 or other EPA-approved testing method as acceptable
to the Director. [R307-401-8]

II.B.5.b The owner/operator shall only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives)
as fuel in the engine. [R307-401-8]

II.B.5.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. [40 CFR 63 Subpart ZZZZ,
R307-401-8]

II.B.5.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. [40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.6 Haul Roads and Fugitive Dust Sources
II.B.6.a The owner/operator shall comply with a FDCP for control of all fugitive dust sources
associated with the aggregate process facility. An electronic FDCP can be completed through
the Utah DEQ Fugitive Dust Plan Permit Application Website. If a written FDCP is
completed, it shall be submitted to the Director, attention: Compliance Branch, for approval.
[R307-401-8]

II.B.6.b The owner/operator shall comply with all applicable requirements of R307-309-5 for Fugitive
Emission and Fugitive Dust sources on site. [R307-309-5]

II.B.6.c The owner/operator shall not allow visible emissions from paved haul roads to exceed 10%
opacity. The owner/operator shall not allow visible emissions from the unpaved haul roads
and fugitive dust sources to exceed 20 percent opacity on site and 10% opacity at the property
boundary. [R307-309-5, R307-401-8]

II.B.6.c.1 Visible emission determinations for fugitive dust emissions from haul-road traffic and mobile
equipment in operational areas 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 1/2 vehicle length behind the vehicle and not less than 1/2
the height of the vehicle. [R307-205-4]

II.B.6.d The total paved haul road shall be no less than 0.30 miles in length. [R307-401-8]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 11
II.B.6.d.1 Compliance shall be determined through Global Positioning System (GPS) measurements or
aerial photographs. [R307-401-8]

II.B.6.e The owner/ operator shall sweep and spray clean the paved in-plant haul road as necessary to
maintain the listed opacity limits in this AO. [R307-401-8]

PERMIT HISTORY

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

Supersedes DAQE-AN119950003-23 dated June 8, 2023

REVIEWER COMMENTS

1. Comment regarding Emission Estimates:
The emission estimates are calculated as follows:
Emission estimates from the generator engine are from AP-42 Section 3.4 and from the
manufacturer of the catalytic converter. The emission factors in AP-42 Section 3.4 are multiplied
with the following catalytic converters efficiencies:
NOx - 6.4%, CO - 72%, and VOC - 74.3%

[Last updated October 11, 2023]

2. Comment regarding NSPS & MACT:
40 CFR 60 (NSPS)
40 CFR Part 60 Subpart OOO applies to select equipment at nonmetallic mineral processing plants
that commenced construction, modification, or reconstruction after August 31, 1983. The screens,
crushers, and transfer/drop points (conveyors, stackers, feed bins) at this facility are subject to 40
CFR Part 60 Subpart OOO.

40 CFR 60 Subpart IIII applies to owner and operators of CI ICE that commence construction,
modification, or reconstruction after 07/11/2005. The CI ICE was manufactured in 2002 and
refurbished in 2023 (see explanation under review comment 4). NSPS Subpart IIII will not apply to
this plant.

40 CFR 63 (MACT)
40 CFR 63 Subpart ZZZZ applies to owners and operators of stationary RICE at a major or area
source of HAP emissions. Since this source will have a stationary RICE at an area source of HAP
emissions, MACT Subpart ZZZZ will apply to this plant.

40 CFR 63 Subpart CCCCCC applies to owners and operators of new or reconstructed gasoline
storage tanks. No stationary gasoline storage tanks are at this site: therefore, Subpart CCCCCC does
not apply to this facility.
[Last updated November 9, 2023]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 12
3. Comment regarding Title V Requirements:
Title V of the 1990 Clean Air Act (Title V) applies to the following:

1. Any major source
2. Any source subject to a standard, limitation, or other requirement under Section 111 of the Act,
Standards of Performance for New Stationary Sources;
3. Any source subject to a standard or other requirement under Section 112 of the Act, Hazardous
Air Pollutants.
4. Any Title IV affected source.

This facility is not a major source and is not a Title IV source. The facility is subject to 40 CFR 60
(NSPS) and 40 CFR 63 (MACT) regulations. The facility is not subject to 40 CFR 61 (NESHAP)
regulations. Title V applies to this facility as an area source. There is no requirement for this source
to apply for a Title V operating permit under current UDAQ and EPA rules. The source will be
charged applicable Title V fees and Title V funds may be used for inventory and compliance
inspections of this source.
[Last updated November 9, 2023]

4. Comment regarding Stack Test Inclusion and Refurbishment of the 750-kW Generator
Engine:
The 750-kW diesel fueled generator engine was manufactured before 2006. 40 CFR 63 Subpart
ZZZZ has a requirement to regularly stack test the generator engine initially and thereafter, when
operations have reached 8,760 hours or three (3) years since the previous test was performed. This
administrative amendment incorporates testing requirements into the AO.

The source refurbished the generator engine. The cost for the refurbishment was 12% of the fixed
capital cost that would be required to construct a comparable entirely new generator engine.
Therefore, this was not a reconstruction, and the NSPS Subpart IIII requirements do not apply to the
refurbished generator engine.

The generator engine, however, is still subject to MACT Subpart ZZZZ requirements. The testing
conditions, including II.B.4.d and II.B.5, are incorporated into this ER to meet the MACT Subpart
ZZZZ requirements. [Last updated December 19, 2023]

Engineer Review N119950004: Allen Gravel LLC- Cove Aggregate Processing Plant
December 19, 2023
Page 13
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

State of Utah
SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor
Department of
Environmental Quality
Kimberly D. Shelley
Executive Director
DIVISTON OF AIR QUALITY
Bryce C. Bird
Director
RN119950004
December 22, 2023
Troy Allen
Allen Gravel LLC
1015 East 12600 North
Cove, UT 84320
[e-mail]
Dear Troy Allen,
Re: Engineer Review - Administrative Amendment:
Administrative Amendment to Approval Order DAQE-ANl 19950003-23 to Include Stack
Testing on the Diesel-Fueled Generator Engine.
Project Number: Nl 19950004
The DAQ requests a company representative review and sign the attached Engineer Review (ER). This
ER identifies all applicable elements of the New Source Review (NSR) permitting program. Allen Gravel
LLC should complete this review within 10 business days of receipt.
Allen Gravel LLC should contact Mr. Tim DeJulis at [phone] if there are questions or concerns
with the review of the draft permit conditions. Upon resolution of your concerns, please email Mr. Tim
DeJulis at [e-mail] the signed cover letter. Upon receipt of the signed cover letter, the DAQ
will prepare an Approval Order (AO) for signature by the DAQ Director.
If Allen Gravel LLC does not respond to this letter vdthin 10 business days, the project will move
forward without souixe concurrence. If Allen Gravel LLC has concerns that cannot be resolved and the
project becomes stagnant, the DA(JJDirector rp^ issue^anprder prohibiting construction.
Approval Signature
195 North 1950 West • Salt Lake City, UT
Mailing Addi-ess: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone (801) 536^000 • Fax [phone] • T.D.D. [phone]
WLH V. deq. utah.gov
Printed on 100% recycled paper
11/14/23, 2:06 PM State of Utah Mail - Allen Gravels Stack Testing Status
https://mail.google.com/mail/u/0/?ik=67721adfe9&view=pt&search=all&permthid=thread-a:r3416998546666242729&simpl=msg-a:r341865102988292…1/2
Tim Dejulis <[e-mail]>
Allen Gravels Stack Testing Status
2 messages
Tim Dejulis <[e-mail]>Fri, Jul 7, 2023 at 9:11 AM
To: Troy Allen <[e-mail]>
Cc: Chad Gilgen <[e-mail]>, Alan Humpherys <[e-mail]>
Hi Troy.
We have an answer on whether the generator engine needs to have stack testing or not. Unfortunately, I had the incorrect
information with respect to the stack testing, based on my review of MACT Subpart ZZZZ.
Cost of Making Changes to the Permit
The DAQ will make the changes to Allen Gravel's permit at no charge. We will fix this situation at no expense to Allen
Gravel.
Permit Changes
The catalytic converter purchased and installed is a requirement, since the engine is older than 2006. Reading MACT
Subpart ZZZZ, we will have Allen Gravel perform an initial stack test and then it would have to be repeated each 8,760 hrs
or three years, whichever is sooner. Based on the hours of operation per year given to me, 2,500 hrs/yr, Allen Gravel
wouldn't need to do another stack test for three years from the date of the first test.
Changes to the Language
The changes to language in the permit are as follows in the attached file.
If you have any questions or concerns please let me know. I am prepared to move forward within this change in the next
few months. Thank you.
Timothy DeJulis, PE
Environmental Engineer | Minor NSR Section
P: [phone]
airquality.utah.gov
Allen Gravel Stack Testing Conditions 2023.docx
14K
Chad Gilgen <[e-mail]>Fri, Jul 7, 2023 at 12:58 PM
To: Tim Dejulis <[e-mail]>
Cc: Troy Allen <[e-mail]>, Alan Humpherys <[e-mail]>
Tim,
Please see the attached document with the changes that need to be made to the proposed stack testing conditions. Item
II.A.7 of the equipment list needs to include the horsepower rating of the engine as that is what Subpart ZZZZ uses to
determine the stack testing CO emission limits.
I also need to see a copy of the updated Approval Order before it is finalized.
Thanks,
11/14/23, 2:06 PM State of Utah Mail - Allen Gravels Stack Testing Status
https://mail.google.com/mail/u/0/?ik=67721adfe9&view=pt&search=all&permthid=thread-a:r3416998546666242729&simpl=msg-a:r341865102988292…2/2
Chad
Chad Gilgen | Manager | Minor Source Compliance
385-306-6500 (cell)
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA requirements.
[Quoted text hidden]
Allen Gravel Stack Testing Conditions 2023_cg.docx
21K