DAQ-2025-000382

Small Source Registration

DAQE-EN162450001-25

{{$d1 }}

Christopher Rose
Staker Parson Companies
89 West 13490 South, Suite 100
Draper, UT 84020
[e-mail]

Dear Mr. Rose:

Re: Request for Evaluation of Compliance with Rule R307-401-9, UAC: Small Source Exemption
Project Fee Code: N162450001

On January 8, 2025, the Division of Air Quality (DAQ) received your request for a small source
exemption for Staker Parson Companies’ Western Rock Concrete Batch Plant #685. The source is located
2 miles south of the intersection of Washington Fields Rd and E Warner Valley Rd in Washington,
Washington County. The DAQ has determined the small source exemption applies to the source, as long
as the equipment and associated processes operate as specified in the registration request. Specifically, the
source shall produce no more than 250,000 square yards of concrete annually and shall water all haul
roads and loader routes to control fugitive particulate emissions.

The small source exemption does not exempt a source from complying with other applicable federal,
state, and local regulations and the current Utah Administrative Code. Based on the emissions that you
submitted to DAQ with your registration request, Staker Parson Companies’ Western Rock Concrete
Batch Plant #685 is not required to obtain an approval order under R307-401. If you change your
operation such that there is an increase in emissions, we recommend that you notify us, as an approval
order may be required.

As authorized by the Utah Legislature, the fee for issuing this small source exemption is a one-time filing
fee in addition to the actual time spent by the review engineer and all other staff on the project. Payment
should be sent to DAQ upon receipt of the invoice.
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

+ 2 / 6 Ú ß Û Ù Û Þ
DAQE-EN162450001-25
Page 2
Thank you for registering your source with the DAQ. If you have any additional questions, please contact
Lucia Mason at [phone] or [e-mail].

Sincerely,

Bryce C. Bird
Director

{{$s }}

Alan D. Humpherys, Manager
New Source Review Section

BCB:ADH:LM:jg

{{#d1=date1_es_:signer1:date:format(date, "mmmm d, yyyy")}} {{#s=Sig_es_:signer1:signature}}
PORTABLE CONCRETE PLANTREXCON MOBILE 12 SE
The RexCon Mobile 12 SE offers the highest standard in quality, design and durability in the
industry. The Mobile 12 SE is constantly updated to improve its performance and stay ahead
of industry changes. This versatile plant can be custom engineered to meet your individual
specifications. Both transit and central mix configurations are available.
RexCon Mobile 12 Self-Erecting
Portable Concrete Plant

MOBILE 12
SELF-ERECTING
CENTRAL MIX
CONCRETE
BATCH PLANT
MOBILE 12 SE-CM SPECIFICATIONS:
• Hydraulic Self Erect System: Includes a 13 HP power pack with
80 gallon reservoir, four transport-friendly landing leg corner cylinders,
two main bin cylinders, two mixer charge chute cylinders, and two
mainframe support section cylinders. The landing legs are controlled by
individual manual valves. Bin, charge chute, and support cylinders are
controlled by a pendant control.
With a reputation for high production and mixing efficiency,
RexCon Central Mix Concrete Batch Plants are ideal as
portable paving plants for major infrastructure projects or
for portable ready mix production. When high production
and portability are critical, you can trust that the Mobile 12
SE-CM will get the job done. With its self-supporting
sub-frame and superior self-erect hydraulic system, this
plant features fast setup times. Low profile mobility,
reliability, and high performance make the
Mobile 12 SE-CM the plant to own.
• Aggregate Section: 12 cubic yard batcher with 66 ton, four compartment
fold-up aggregate bin with quick pin connections on exterior of bin and
slide-in/bolted divider walls.
• Batch Belt Conveyor: 48” wide, 3-ply belt with vulcanized splice and
50 HP drive. Belt operates at 680 FPM.
• Cement Section: Two each 150 bbl (28 ton) compartments with 5” fill pipes
and long lasting low wear elbows. Two 12” dia. screws powered by 50 HP
direct drives. Includes sealed inspection hatch with high and low bin signals.
• Accumulative Batchers: Compression load cells and telescoping
calibration arms.
• Tilt Mixer: 12 yard portable tilt mixer with self-erect hydraulic system.
• High Pressure Air System: 20 HP air compressor with 120 gallon tank.
All batcher gates are controlled by double acting sub-base mounted solenoids.
• Low Pressure Air System: 4.6 HP regenerative type blower with
individually adjustable bin flow pads.
• Water System: 3” mag meter, 3” mag temper meter and
15 HP water pump case.
• Transportation Gear: King pin, spring suspension, triple axles,
radial tires, brakes and signal lights.
• Power Panel: NEMA dust tight steel enclosure with single
lockable main disconnect switch. Across the line starters are
provided for all factory installed motors.
All wiring is plug and cord.

REXCON MOBILE 12 SE

• 600 bbl self erect auxiliary cement bin with on-board power panel,
aeration, and hydraulic system.
• Portable material handling system with up to four stackable
conveyors/hoppers or self-erect individual conveyors.
• 135 ton, three compartment portable aggregate bin or
up to 200 Ton bin extensions.
• Two or three decumulative batchers for low profile
aggregate ramp feeding.
• RexCon batch automation controls with
20’ office control container.
• Central dust collector and/or individual dust collectors
for cement bins and batcher and mixer pickup points.
• Central grease system.
MOBILE 12 SE-CM OPTIONS:
MOBILE 12 SE-CM FEATURES:
• Hydraulic plant and mixer erection: Powered by a remote cable
controlled hydraulic pack. The Mobile 12 SE-CM can be taken off a truck
hitch and raised to operating position in minutes. No crane required for
setup and tear-down of the base plant and mixer. The mixer charge chute
is hydraulically adjustable.
• Aggregate section: Flexible design allows for up to four materials and
an exterior pinned fold-down aggregate bin.
• Cement section: High speed screws with direct drive motors batch
cement quickly. Integrated two compartment cement bin for added
flexibility. Oversized cement batcher for high strength mixes.
• Adaptable for numerous types of mixers depending on your project
requirements, including tilt, pan, planetary, or twin shaft mixers.
• Batch belt: 48” wide batch belt maximizes production rates.
Operating: Length with Mixer 80’ 6 1/8”
Length without Mixer 73’ 3/8”
Total Height 27’ 9 5/8”
Aggregate Bin Height 17’ 3 9/16”
Travel: Plant Load Length 71’ 4 1/4”
Plant Load Height 14’ 2 1/16”
Mixer Load Length 39’ 4 1/16”
Mixer Load Height 13’ 10”
DIMENSIONS

MOBILE 12
SELF-ERECTING
TRANSIT MIX
CONCRETE
BATCH PLANT
The reliability and modular design of the RexCon Transit Mix
Batch Plants keep maintenance and installation time to a minimum.
With its self-supporting sub-frame and superior hydraulic system,
the Mobile 12 SE-TM moves in and sets up quickly, provides lower
mobilization costs without the need for costly foundations, and
inherent future central mix expansion capability. Multiple material
storage designs and high speed batching capabilities make the
Mobile 12 SE-TM the most versatile and portable batch plant design
on the market.
MOBILE 12 SE-TM SPECIFICATIONS:
• Aggregate Section: 12 cubic yard batcher with 66 ton,
Four compartment fold-up aggregate bin with quick pin connections
on exterior of bin and slide-in/bolted divider walls.
• Batch Belt Conveyor: 48” wide, 3-ply belt with vulcanized splice
and 50 HP drive. Belt operates at 680 FPM.
• Cement Section: Two each 150 bbl (28 ton) compartments with
5” fill pipes and long lasting low wear elbows. Two 12” dia. screws
powered by 50 HP direct drives. Includes sealed inspection hatch
with high and low bin signals.
• Accumulative Batchers: Compression load cells and telescoping
calibration arms.
• High Pressure Air System: 20 HP air compressor with
120 gallon tank. All batcher gates are controlled by double acting
sub-base mounted solenoids.
• Low Pressure Air System: 4.6 HP regenerative type blower with
individually adjustable bin flow pads.
• Water System: 3” Mag meter
• Transportation Gear: King pin, spring suspension, triple axles,
radial tires, brakes and signal lights.
• Power Panel: NEMA dust tight steel enclosure with single lockable
main disconnect switch. Across the line starters are provided for all factory
installed motors. All wiring is plug and cord.
• Hydraulic Self Erect System: Includes a 13 HP power pack with
80 gallon reservoir, four transport-friendly landing leg corner cylinders,
two main silo cylinders and two mainframe support section cylinders.
The landing legs are controlled by individual manual valves. Silo and
support cylinders are controlled by a pendant control. System is already
sized for adding a future self-erect tilt mixer.
REXCON MOBILE 12 SE

MOBILE 12 SE-TM FEATURES:
• Hydraulic plant erection: Powered by a remote cable controlled hydraulic
pack. The Mobile 12 SE-CM can be taken off a truck hitch and raised to operating
position in minutes. No crane required for setup and tear-down of the base plant.
The hydraulic system is sized for adding a future self-erect tilt mixer.
• No steel pads and extra loads necessary for plant support:
Main structure extends entire length of frame on both sides eliminating your need
for hauling steel pads or a concrete slab depending on soil conditions.
• Loading height: 14’ clearance (to steel) for loading front and rear discharge trucks.
• Aggregate section: Flexible design allows for up to four materials and an exterior
pinned fold-down aggregate bin.
• Cement section: High speed screws with direct drive motors batch cement quickly.
Integrated two compartment cement bin for added flexibility. Oversized cement
batcher for high strength mixes.
• Future central mix capability based on your project requirements.
• Batch belt: High speed batch belt maximizes production rates.
Operating: Length 60’ 3 5/16”
Total Height 29’ 3”
Aggregate Bin Height 17’ 3 9/16”
Grade to Steel Charge Chute Height 14’0”
Travel: Plant Load Length 71’ 4 1/4”
Plant Load Height 14’ 2 1/16”
DIMENSIONS
• 600 bbl self-erect auxiliary cement bin with on-board power panel,
aeration, and hydraulic system.
• Portable material handling system with up to four stackable
conveyors/hoppers, self erect individual conveyors, or radial stacker.
• 135 ton, three compartment portable aggregate bin or up to
200 ton bin extensions.
• Two or three decumulative batchers for low profile aggregate ramp feeding.
• RexCon batch automation controls with 20’ office control container.
• Central dust collector and/or Individual dust collectors for cement bins
and batcher and truck mixer pickup points.
• Central grease system.
• VFD for transit mix with 48” batch belt or a 36” batch belt.
• Central mix conversion package: Includes 500 gallon batched water
holding reservoir, 3” temper mag meter, 6” discharge to mixer charge chute.
MOBILE 12 SE-TM OPTIONS:
All specifications subject to change without notice. Products shown are representative, details may vary. Equipment show with options available at additional cost.Rev. 5/21
www.astecindustries.com
Lucia Mason <[e-mail]>
Concrete batch Small Source Exemption (SSE) Address and Location
11 messages
Lucia Mason <[e-mail]>Wed, Jan 8, 2025 at 2:03 PM
To: "Rose, Chris (Staker & Parson Companies)" <[e-mail]>
Hi Chris,
Could you provide an address and UTM coordinates for the concrete batch plant SSE?
Thanks,
Lucia
Rose, Chris (Staker & Parson Companies) <[e-mail]>Wed, Jan 8, 2025 at 2:12 PM
To: Lucia Mason <[e-mail]>
Hi Lucia,

There’s not an address for the site, but the location falls within the borders of Washington, UT.

UTM coordinates are (278591.00 m E, 4101262.00 m N).

Thanks,

Christopher Rose
Environmental Specialist
West Division

Staker Parson
1/14/25, 3:39 PM State of Utah Mail - Concrete batch Small Source Exemption (SSE) Address and Location
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-a:r6321293710110394504&simpl=msg-a:r5422342440802270322&simpl=msg-f:1820716674476845525&simpl=…1/5
A CRH COMPANY
89 West 13490 South
Draper, Utah 84020

C [phone]
E [e-mail]

From: Lucia Mason <[e-mail]>
Sent: Wednesday, January 8, 2025 2:04 PM
To: Rose, Chris (Staker & Parson Companies) <[e-mail]>
Subject: [EXT] Concrete batch Small Source Exempon (SSE) Address and Locaon

CAUTION: This email originated from outside of the organizaon. Do not click links or open aachments unless you are expecng this email and know the contents are safe.
If you believe this email may be phishing or malicious, please use the Report Phish buon.
[Quoted text hidden]
ATTENTION: Ce courriel vient de l'exterieur de l'entreprise. Ne cliquez pas sur les liens, et n'ouvrez pas les pièces jointes, à moins que vous ne connaissiez l'expéditeur du
courriel et savez que le contenu est sécuritaire. Si vous pensez qu’il s’agit d’un courriel d’hameçonnage ou malveillant, veuillez cliquer sur le bouton Signaler une tentave
d’hameçonnage.
Lucia Mason <[e-mail]>Wed, Jan 8, 2025 at 2:47 PM
To: "Rose, Chris (Staker & Parson Companies)" <[e-mail]>
Hi Chris,
Thanks for the UTM coordinates. The DAQ needs to include some sort of address to define the facility's location. We could use the following if it seems reasonable
to you:
2 miles south of the intersection of Washington Fields Rd and E Warner Valley Rd, Washington, UT
1/14/25, 3:39 PM State of Utah Mail - Concrete batch Small Source Exemption (SSE) Address and Location
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-a:r6321293710110394504&simpl=msg-a:r5422342440802270322&simpl=msg-f:1820716674476845525&simpl=…2/5
Let me know,
Lucia
[Quoted text hidden]
Rose, Chris (Staker & Parson Companies) <[e-mail]>Wed, Jan 8, 2025 at 3:07 PM
To: Lucia Mason <[e-mail]>
Lucia,

That sounds like a good description to me. There will be an address by the end of the project, so I’ll contact you to amend the registration when I
hear what it is.
[Quoted text hidden]
Lucia Mason <[e-mail]>Wed, Jan 8, 2025 at 3:08 PM
To: "Rose, Chris (Staker & Parson Companies)" <[e-mail]>
Sounds good. Thank you.
[Quoted text hidden]
Lucia Mason <[e-mail]>Thu, Jan 9, 2025 at 7:35 AM
To: "Rose, Chris (Staker & Parson Companies)" <[e-mail]>
Hey Chris,
Could you send me a specification sheet or model number for the 8 MMBtu/hr boiler on site?
Thanks,
Lucia
[Quoted text hidden]
Rose, Chris (Staker & Parson Companies) <[e-mail]>Thu, Jan 9, 2025 at 9:18 AM
To: Lucia Mason <[e-mail]>
Sure, I’m getting the specs from the site manager. I’ll forward them on when I see them.
[Quoted text hidden]
Lucia Mason <[e-mail]>Thu, Jan 9, 2025 at 9:30 AM
1/14/25, 3:39 PM State of Utah Mail - Concrete batch Small Source Exemption (SSE) Address and Location
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-a:r6321293710110394504&simpl=msg-a:r5422342440802270322&simpl=msg-f:1820716674476845525&simpl=…3/5
To: "Rose, Chris (Staker & Parson Companies)" <[e-mail]>
Sounds good. Thank you.
[Quoted text hidden]
Rose, Chris (Staker & Parson Companies) <[e-mail]>Fri, Jan 10, 2025 at 10:27 AM
To: Lucia Mason <[e-mail]>
Lucia,

The boiler is an integrated unit with the plant. The plant is a 2022 Astec Rexcon Mobile 12-SE batch plant. The firing rate is 7.5 MMBtu/hr.

Thank you,
[Quoted text hidden]
Lucia Mason <[e-mail]>Mon, Jan 13, 2025 at 7:44 AM
To: "Rose, Chris (Staker & Parson Companies)" <[e-mail]>
1/14/25, 3:39 PM State of Utah Mail - Concrete batch Small Source Exemption (SSE) Address and Location
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-a:r6321293710110394504&simpl=msg-a:r5422342440802270322&simpl=msg-f:1820716674476845525&simpl=…4/5
Hi Chris,
Thanks for the clarification. Before processing your application further I want to confirm that there are no storage piles, disturbed areas, or loaders on site. If there
are, please fill out the applicable attached spreadsheet(s) and add the resulting emissions to your site total.
Hope you had a good weekend. Please reach out with any questions.
Thanks,
Lucia
[Quoted text hidden]
3 attachments
DAQ Disturbed Ground.xlsx
67K
DAQ Storage Piles.xlsx
67K
DAQ Loader Routes.xlsx
68K
Rose, Chris (Staker & Parson Companies) <[e-mail]>Tue, Jan 14, 2025 at 9:42 AM
To: Lucia Mason <[e-mail]>

Hi Lucia,

You’re right, I forgot to calculate those totals. I’ve attached the updated spreadsheet.
[Quoted text hidden]
Western Rock Portable Batch Plant #685 calcs.xlsx
112K
1/14/25, 3:39 PM State of Utah Mail - Concrete batch Small Source Exemption (SSE) Address and Location
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-a:r6321293710110394504&simpl=msg-a:r5422342440802270322&simpl=msg-f:1820716674476845525&simpl=…5/5
Emissions Totals
Source PM10 SO2 CO NOx VOCs HAPs
Batch Plant 2.13 0 0 0 0 0
Water Heater 0.12 0.01 1.3 1.54 0.08 0.03
Haul Roads 1.49 0 0 0 0 0
Loader Routes 0.23 0 0 0 0 0
Storage Piles 0.06 0 0 0 0 0
Disturbed Area 0.03 0 0 0 0 0
Totals in ton/yr 4.06 0.01 1.3 1.54 0.08 0.03
DAQ Sums to Confirm Acreage via Google Earth
Acreage
Storage Piles 0.1628Disturbed Ground 0.1427
Total 0.3055
Equipment Details
Hourly Rating 120 yd3/hour
Annual Production 250,000 yd3/year
Type Central-Mix
Pollutant
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
PM10 2.05 2.13
PM2.5 29.4%0.60 0.63
HAP 0.00 0.00
Process
(Controlled)
PM10 Emission
Factor
(lb/ton)
PM10 Emission
Factor
(lb/yd3)
PM10 Emission
Rate
(lbs/hr)
PM10 Emission
Total
(tons/year)Reference
Aggregate Delivery to Ground 0.0031 0.37 0.39
Sand Delivery to Ground 0.0007 0.08 0.09
Aggregate Delivery to Conveyor 0.0031 0.37 0.39
Sand Delivery to Conveyor 0.0007 0.08 0.09
Aggregate Delivery to Storage 0.0031 0.37 0.39
Sand Delivery to Storage 0.0007 0.08 0.09
Cement Delivery to Silo 0.0001 0.01 0.01
Additive Delivery to Silo 0.0002 0.02 0.03
Weigh Hopper Loading 0.0038 0.46 0.48
Central Mix Loading 0.0055 0.001551 0.19 0.19
Hazardous Air Pollutant
(Controlled)
Emission
Factor
(lb/ton)
Emission
Factor
(lb/yd3)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
Arsenic 1.30E-06 3.67E-07 4.40E-05 4.58E-05
Beryllium 9.09E-08 2.56E-08 3.08E-06 3.20E-06
Cadmium 9.08E-10 2.56E-10 3.07E-08 3.20E-08
Chromium 1.38E-06 3.88E-07 4.66E-05 4.85E-05
Lead 5.68E-07 1.60E-07 1.92E-05 2.00E-05
Manganese 4.15E-06 1.17E-06 1.41E-04 1.46E-04
Nickel 2.57E-06 7.25E-07 8.70E-05 9.06E-05
Phosphorus 4.74E-06 1.34E-06 1.60E-04 1.67E-04
Selenium 7.24E-08 2.04E-08 2.45E-06 2.55E-06
Concrete Batch Plants
See Below, & AP-42
Appendix B.2.2
Category 3
AP-42 Table 11.12-8
AP-42 Table 11.12-2,
Table 11.12-5,
Table 11.12-6,
Equation 11.12-2
Percent
PM2.5 of PM10
Page 2 of 7 Version 1.0
November 29, 2018
Equipment Details
Rating 8 MMBtu/hour
Operational Hours 4,200 hours/yearFiringNormal
Criteria Pollutant
Concentration
(ppm)
Emission
Factor
(lb/10^6 scf)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
NOX 100 0.74 1.54
CO 84 0.62 1.30
PM10 7.6 0.06 0.12
PM2.5 7.6 0.06 0.12
SO2 0.6 0.00 0.01
VOC 5.5 0.04 0.08
Lead 0.0005 0.00 0.00
HAP 0.01 0.03 See Below
Green House Gas Pollutant
Global
Warming
Potential
Emission
Factor
(lb/10^6 scf)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
CO2 (mass basis)1 120,000 882 1,853
Methane (mass basis)25 2.3 0.02 0.04
N2O (mass basis)298 2.2 0.02 0.03
CO2e 1,864
Hazardous Air Pollutant
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
2-Methylnaphthalene 2.40E-05 1.76E-07 3.71E-073-Methylchloranthrene 1.80E-06 1.32E-08 2.78E-08
7,12-Dimethylbenz(a)anthracene 1.60E-05 1.18E-07 2.47E-07
Acenaphthene 1.80E-06 1.32E-08 2.78E-08
Acenaphthylene 1.80E-06 1.32E-08 2.78E-08
Anthracene 2.40E-06 1.76E-08 3.71E-08
Benz(a)anthracene 1.80E-06 1.32E-08 2.78E-08Benzene2.10E-03 1.54E-05 3.24E-05
Benzo(a)pyrene 1.20E-06 8.82E-09 1.85E-08Benzo(b)fluoranthene 1.80E-06 1.32E-08 2.78E-08
Benzo(g,h,i)perylene 1.20E-06 8.82E-09 1.85E-08Benzo(k)fluoranthene 1.80E-06 1.32E-08 2.78E-08
Chrysene 1.80E-06 1.32E-08 2.78E-08
Dibenzo(a,h)anthracene 1.20E-06 8.82E-09 1.85E-08
Dichlorobenzene 1.20E-03 8.82E-06 1.85E-05
Fluoranthene 3.00E-06 2.21E-08 4.63E-08Fluorene2.80E-06 2.06E-08 4.32E-08
Formaldehyde 7.50E-02 5.51E-04 1.16E-03Hexane1.80E+00 1.32E-02 2.78E-02
Indeno(1,2,3-cd)pyrene 1.80E-06 1.32E-08 2.78E-08Naphthalene6.10E-04 4.49E-06 9.42E-06
Phenanathrene 1.70E-05 1.25E-07 2.63E-07Pyrene5.00E-06 3.68E-08 7.72E-08
Toluene 3.40E-03 2.50E-05 5.25E-05Arsenic2.00E-04 1.47E-06 3.09E-06
Beryllium 1.20E-05 8.82E-08 1.85E-07Cadmium1.10E-03 8.09E-06 1.70E-05
Chromium 1.40E-03 1.03E-05 2.16E-05
Cobalt 8.40E-05 6.18E-07 1.30E-06
Manganese 3.80E-04 2.79E-06 5.87E-06
Mercury 2.60E-04 1.91E-06 4.01E-06Nickel2.10E-03 1.54E-05 3.24E-05Selenium2.40E-05 1.76E-07 3.71E-07
AP-42 Table 1.4-4
Manufacturer Data
or AP-42 Table 1.4-1
AP-42 Table 1.4-2
Natural Gas-Fired Boilers & Heaters
AP-42 Table 1.4-2
&
Table A-1 to
Subpart A of Part 98
AP-42 Table 1.4-3
Emission Factor
(lb/10^6 scf)
Page 3 of 7 Version 1.0
November 29, 2018
Production Rates
Hourly Rates 240 tons/hourAnnual Production 500,000 tons/year
Truck Information
Empty Truck Weight 17 tons
Weight of Load 23 tonsLoaded Truck Weight 40 tons
Haul Road Information
Haul Road One-Way Length 667 feet
Hourly Vehicle Miles Traveled 2.6 miles
Annual Vehicle Miles Traveled 5,492 milesType of Control
Pollutant
Uncontrolled
Emission
Factor
(lb/VMT)
Controlled
Emission
Factor
(lb/VMT)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
PM10 1.81 0.54 1.43 1.49
PM2.5 0.181 0.054 0.14 0.15
Haul Roads
AP-42 13.2.2 & DAQ
Haul Road Guidance
Basic Watering - (70% control)
Page 4 of 7 Version 1.0
November 29, 2018
Production Rates
Hourly Rates 120 tons/hourAnnual Production 250,000 tons/year
Loader Information
Empty Loader Weight 33 tons
Weight of Load 11 tonsLoaded Loader Weight 44 tons
Loader Route\ Information
Loader Route One-Way Length 84 feet
Hourly Vehicle Miles Traveled 0.3 miles
Annual Vehicle Miles Traveled 725 milesType of Control
Pollutant
Uncontrolled
Emission
Factor
(lb/VMT)
Controlled
Emission
Factor
(lb/VMT)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
PM10 2.08 0.63 0.22 0.23
PM2.5 0.208 0.063 0.02 0.02
Loader Routes
AP-42 13.2.2 & DAQ
Haul Road Guidance
Basic Watering - (70% control)
Page 5 of 7 Version 1.0
November 29, 2018
Storage Pile AreaTotal Area of Storage Piles 0 acres
Control Efficiency
PM10 Control Efficiency 66%
PM2.5 Control Efficiency 40%
Pollutant
Uncontrolled Emission
Factor
(lb/acre-day)
Controlled Emission
Factor
(lb/acre-day)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
PM10 6.30 2.14 0.01 0.06 AP-42 Fourth Edition Table 8.19.1-1
PM2.5 1.85 1.11 0.01 0.03 AP-42 Appendix B.2 Table B.2-2
Storage Piles
AP-42 Appendix B.2 Tables B.2-2 & B.2-3
Reference
Page 6 of 7 Version 1.0
November 29, 2018
Wind Erosion of Exposed Area
Total Area of Disturbed Ground 0 acres
Emission Factors & Distribution
TSP Emission Factor 0.38
PM10 Content 50%
PM2.5 Content 7.5%
Pollutant
Emission
Factor
(tons/acre-year)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)
PM10 0.19 0.01 0.03
PM2.5 0.03 0.00 0.00
Disturbed Ground
Reference
AP-42 Section 13.2.5.3
AP-42 Table 11.9-4
Page 7 of 7 Version 1.1
September 4, 2019
Response Summary:
To be eligible businesses shall not do any of the follow:

1) Emit more than 5 tons per year of each of the following pollutants: Sulfur Dioxide (SO2), Carbon Monoxide (CO),
Nitrogen Oxides (NOx), Particulate Matter (PM10), Ozone (O3), or Volatile Organic Compounds (VOCs).
2) Emit more than 500 lbs/yr of any single Hazardous Air Pollutant (HAP), and emit more than 2000 lbs/yr of any
combination of HAPs
3) Emit more than 500 lbs/yr of any combination of air contaminants not listed in 1 or 2

A copy of this registration notice and worksheets are required on site to verify permit exemption status.

Please be aware a the Small Source Exemption ONLY exempts the site from the air permitting requirements of R307-
401-5 thru R307-401-8 of the Utah Administrative Code, all other air quality regulations still apply.

Q4.
Please fill out the following contact information:
Site Contact Site Owner
Name Christopher Rose Western Rock Portable RMC
#685 Staker Parson Companies
Mailing
Address 89 W 13490 S 89 W 13490 S 89 W 13490 S
Mailing
Address 2
City Draper Draper Draper
State Utah Utah Utah
Zip Code 84020 84020 84020
Phone [phone]-2119
Fax
Email [e-mail] [e-mail] [e-mail]

Q5. County the Site is located in:
Washington County

Q6. Briefly describe the process including the end products, raw materials, and process equipment used.
This process is a portable concrete plant. Washed aggregate is mixed with cement powder, lime, and admixes in a
central drum. The pre-mixed concrete is then loaded into mixer trucks for distribution.

Q7. List emission units
(1) 2021 Rexcon Mobile 12-SE, (1) 2022 Carrier 60 ton water chiller, (1) 2024 Rexcon 12 yd3 mixer, (2) 2021
Goodfellows conveyors

Q8. List any pollution control equipment
Standard equipped baghouse, water suppression for mixer access road

Q9. Please include Annual Emission Rates calculation spreadsheet.
[Click here]

Q11. Contact Information: (person filling out form - signature will be required)
Name Christopher Rose
Title Environmental Specialist
Phone [phone]
Date 1/7/25

Q10. By signing below, I hereby certify that the information and data submitted in this notice fully describes
this site and ONLY this site. The information provide is true, accurate, and complete to the best of my
knowledge. I understand that I am responsible for determining whether the site remain eligible for this
exemption before making operational or process changes in the future, and agree to notify the Division of
Air Quality when this site is not longer eligible for this exemption. (Signature of Owner/Manager)
[Click here]

Embedded Data:
N/A