DAQ-2025-002116

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DAQC-CI104390001-25
Site ID 10439 (B1)

MEMORANDUM

TO: FILE – LAKEVIEW ROCK PRODUCTS – North Salt Lake Pit

THROUGH: Chad Gilgen, Minor Source Compliance Section Manager

FROM: Daniel Riddle, Environmental Scientist

DATE: April 7, 2025

SUBJECT: FULL COMPLIANCE EVALUATION, Minor, Salt Lake County

INSPECTION DATE: June 19, 2024

SOURCE LOCATION: 2490 North Beck Street Frontage
North Salt Lake, UT 84054

SOURCE CONTACTS: Kevin Smith, Vice President of Operations
801-940-2529, [e-mail]

Dan Hammond, Foreman
801-831-8493 [e-mail]

OPERATING STATUS: Operating normally at time of inspection.

PROCESS DESCRIPTION: Lakeview Rock Products operates an Aggregate and Hot Mix
Asphalt Plant. Lakeview Rock Products operates the North Salt
Lake Pit and Thomas Pit previously covered by two AOs.
Lakeview acquired the plot of land previously separating these
two sources and on-site operations now exist in a contiguous
area. The AO combines the asphalt and aggregate plants
including an upper and two lower pits. The upper pit is accessed
by a paved road south of the lower plant. Pace Lane provides
access to blasting areas and bulldozer push points. Blasting
loosens rock. Raw aggregate material is handled by front-end
loader (FEL). Material placed into the feeder falls into a jaw
crusher where larger rocks are broken down. The material is then
conveyed to a screen where it is separated according to size.
Material that is too large to pass through the screen falls into a
cone crusher where it is crushed to a smaller size. The crushed
rock is then routed back to a screen for further separation.
Material that passes through the screens is conveyed to storage
piles where it is stored according to size. The stored material is
then loaded into haul trucks for delivery. Hot Mix Asphalt
(HMA) Plant mixes aggregate, lime, and asphalt cement in a
Drum Dryer with a bag house.

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APPLICABLE REGULATIONS: Approval Order (AO) DAQE-AN104390011-17, dated July 10,
2017
NSPS (Part 60) IIII: Standards of Performance for Stationary
Compression Ignition Internal Combustion Engines,
NSPS (Part 60) OOO: Standards of Performance for Nonmetallic
Mineral Processing Plants,
NSPS (Part 60) I: Standards of Performance for Hot Mix Asphalt
Facilities

SOURCE EVALUATION:

Name of Permittee: Permitted Location:

Lakeview Rock Products- North Salt Lake Pit
900 North Redwood Road PO Box 540700
North Salt Lake, UT 84054
2490 North Beck Street Frontage
North Salt Lake, UT

SIC Code: 1442: (Construction Sand & Gravel)

Section I: GENERAL PROVISIONS

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

I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]
I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1]
I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by the owner/operator, shall be made available to the Director or Director's representative upon request, and the records shall include the two-year period prior to the date of the request. Unless
otherwise specified in this AO or in other applicable state and federal rules, records shall be kept for a minimum of two (2) years. [R307-401-8]
I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators shall, to the extent practicable, maintain and operate any equipment approved under this AO, including associated air pollution control equipment, in a manner consistent with good air pollution control
practice for minimizing emissions. Determination of whether acceptable operating and maintenance procedures are being used will be based on information available to the Director which may include, but is not limited to, monitoring results, opacity observations, review of
operating and maintenance procedures, and inspection of the source. All maintenance performed on equipment authorized by this AO shall be recorded. [R307-401-4]
I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107]
I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150] Status: Out of Compliance. Unapproved equipment was observed at the time of inspection. See section II for more details. No limits set forth in this AO have been exceeded. The equipment appeared to be properly operated and maintained according to manufacturer recommendations. Records are kept as required and were made available after the inspection. No breakdowns have been reported since the previous inspection. An emissions inventory was submitted in 2023 and emissions data are reported below.
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Section II: SPECIAL PROVISIONS

II.A The approved installations shall consist of the following equipment:

II.A.1 Aggregate and Hot Asphalt Mix Plant
II.A.2 Aggregate Pits Aggregate Processing in Upper Main, Lower Main, and Thomas Pits
II.A.3 Six (6) Cone Crushers Maximum Capacity: 500 TPH/Ea. (1) Cone Crusher Manufacture Date: 1998 (2) Cone Crusher Manufacture Date: 2003 (3) Standard Head Cone Crusher Manufacture Date: 2003 (4) Cone Crusher Manufacture Date: 1981 Not Subject to NSPS Subpart OOO (5) Cone Crusher Manufacture Date: 2006 (6) Cone Crusher Manufacture Date: 2006
II.A.4 Four (4) Jaw Crushers Maximum Capacity: 500 TPH/Ea. (1) Manufacture Date: 1991 (2) Manufacture Date: 1977 Not Subject to NSPS Subpart OOO (3) Manufacture Date: 2005 (4) Manufacture Date: 1989
II.A.5 Three (3) Grizzly Feeders Maximum Capacity: 500 TPH/Ea. (1) Grizzly Feeder Manufacture Date: 1991 (2) Vibrating Grizzly Feeder Manufacture Date: 2005
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(3) Vibrating Grizzly Feeder Manufacture Date: 1989 Not Subject to NSPS Subpart OOO
II.A.6 Ten (10) Screens (1) Triple-Deck 6' X 20' Manufacture Date: 1998 (2) Triple-Deck 6' x 20' Manufacture Date: 2003 (3) Shaker 4' x 10' Manufacture Date: 1984 (4) Double-Deck 6' x 12' Manufacture Date: 2003 (5) Triple-Deck 6' x 20' Manufacture Date: 2003 (6) Double-Deck 5' x 16' Manufacture Date: 2006 (7) Triple-Deck 6' X 20' Manufacture Date: 2006 (8) Triple-Deck 6' X 20' Manufacture Date: 2006 (9) Triple-Deck 6' X 20' Manufacture Date: 2016 (10) TBD* Manufacture Date: TBD
II.A.7 One (1) Vertical Shaft Impactor Maximum Capacity: 500 TPH Manufacturer Date: 2014
II.A.8 One (1) Diesel Generator Maximum Rating: 350 kW Fuel: Diesel NSPS Applicability: 40 CFR 60 IIII MACT Applicability: 40 CFR 63 ZZZZ
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II.A.9 HMA Plant Hot Mix Asphalt Plant
II.A.10 One (1) Drum Dryer Maximum Burner Rating: 100 MMBtu/hr
II.A.11 One (1) Hot Oil Heater Maximum Burner Rating: 2.0 MMBtu/hr
II.A.12 One (1) Baghouse/Dust Collection S Maximum Rating: 72,000 ACFM
II.A.13 Six (6) Hot Mix Asphalt Storage Silos Maximum Capacity: 200 Tons Each
II.A.14 One (1) Lime Storage Silo/Mixing System Lime Storage
II.A.15 Four (4) Asphalt Cement Storage Tanks 30,000 gallons each
II.A.16 Miscellaneous Equipment Includes: loaders, dozers, conveyors, water and haul trucks, cranes, manlifts, excavators, etc. *New Equipment
Status: Out of Compliance. Unapproved equipment was observed on site at the time of inspection. This included two grizzly feeders, a horizontal shaft impactor, a 5' x 16' screen, and two diesel generators. A Compliance Advisory (DAQC-681-24) was issued on July 10, 2024, for the unpermitted equipment. The source responded on July 19, 2024. The DAQ met with source contacts regarding compliance issues on August 13, 2024. An Early Settlement Agreement (DAQC-1127-24) was issued on December 5, 2024. The DAQ met again with source contacts on January 8, 2024. As a result of that meeting, a Modified Early Settlement Agreement (DAQC-031-25) was issued on January 16, 2025. The source provided payment on February 18, 2025. A Signed Early Settlement Agreement (DAQC-188-25) was issued on February 20, 2025. The source submitted a Notice of Intent to modify their AO on February 28, 2025. No further compliance action is recommended at this time.

II.B Requirements and Limitations
II.B.1 Site Wide Requirements II.B.1.a 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] Status: In Compliance. Notification was completed in a previous inspection. See DAQC-530-21 for more information.
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II.B.1.b Visible emissions from the following emission points shall not exceed the following values: A. Crushers - 12% opacity B. Screens - 7% opacity C. All Conveyor Transfer Points - 7% opacity D. All Conveyor Drop Points - 20% opacity E. All Baghouse/Silo Exhaust Stacks - 10% opacity F. All Diesel Engines - 20% opacity G. All Natural gas fired equipment exhaust points - 10% opacity H. All Other Points - 20% opacity Opacity observations of visible emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. [R307-312, R307-401-8] Status: In Compliance. Emissions observed at the time of inspection were beneath the opacity limit over an average of 6 minutes. Method 9 was utilized to verify opacity limits. See attached VEO form. II.B.1.b.1 For equipment subject to NSPS, opacity shall be determined by conducting observations in accordance with 40 CFR 60.11(b) and 40CFR 60, Appendix A, Method 9. [40 CFR 60 Subpart OOO, R307-312] II.B.1.b.2 The duration of the initial Method 9 observations shall: A. Be 30 minutes (five six-minute averages) B. Be based on the average of the five six-minute averages C. Be completed by a certified observer Emission points which are subject to the initial observations are those as defined in 40 CFR 60.670. [40 CFR 60 Subpart OOO, R307-312] Status: In Compliance. The opacity observation for the Triple Deck Screen and the Vertical Shaft Impactor were conducted on December 10, 2018, in accordance with the requirements of 40 CFR 60 Subpart OOO. Initial opacity observations for new equipment were completed on September 4, 2024. See attached for VEOs. Monthly nozzle inspections are completed as part of a daily MSHA work place examination. See attached for examples. II.B.2 Aggregate Pit Requirements II.B.2.a Aggregate production shall not exceed 3,750,000 tons of processed material per rolling 12-month period. [R307-401-8]

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II.B.2.a.1 To determine compliance with a rolling 12-month total the owner/operator shall calculate a new 12-month total by the twentieth day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production shall be determined by scale house records or vendor receipts. The records of production shall be kept on a daily basis. Production shall be determined by supervisor monitoring and maintaining of an operations log. [R307-401-8] Status: In Compliance. For the rolling 12-month period from June 2023 - May 2024, a total of 910,585 tons of aggregate material was processed. Daily production records are determined from records maintained during operations, scale house records, or vendor receipts. See the attached table below for more information. II.B.2.b All drilling activities shall be controlled with a drill rotoclone or similar dust shroud device. [R307-401-8] Status: In Compliance. All drilling activities at Lakeview Rock Products are controlled with water and a dust shroud. II.B.2.c On site blasting shall not exceed 100 blasts per 12-month rolling period. The owner/operator shall not blast more than 100 blasts per rolling 12-month period. [R307-401-8] II.B.2.c.1 Records of all blasting activity shall be kept in a log on site. [R307-401-8] Status: In Compliance. For the rolling 12-month period from June 2023 - May 2024, a total of 24 blasts were completed. Blasting records are kept in a log on site as required. See the attached table below for more information. II.B.2.d Water sprays shall operate, if necessary, to control fugitive emissions and to meet opacity requirements at the following points: A. All crushers B. All screens C. All unenclosed conveyor transfer points. [R307-401-8] Status: In Compliance. Water sprays were observed and appeared to be operating correctly at the time of inspection. Emissions observed at the time of inspection were beneath the opacity limit over an average of 6 minutes. Method 9 was utilized to verify opacity limits. See attached VEO form. II.B.3 Diesel Generator Requirements II.B.3.a Diesel fuel consumption for the generator shall not exceed 50,000 gallons per rolling 12-month period. [R307-401-8] II.B.3.a.1 To determine compliance with a rolling 12-month total, the owner/operator shall calculate a new 12-month total by the twentieth day of each month using data from the previous 12 months. Fuel use shall be determined by supervisor monitoring and maintaining of an operations log. [R307-401-8] Status: In Compliance. For the rolling 12-month period from June 2023 - May 2024, a total of 31,574 gallons of diesel fuel were consumed. See the attached table below for more information.

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II.B.4 The Hot Mix Asphalt Plant Operating Requirements II.B.4.a The following production/operating limits shall not be exceeded: A. 750,000 tons of asphalt production per rolling 12-month period B. Production shall be at or below 250 tons per hour (tph) during operations occurring between December 1st and February 29th. [R307-312, R307-401-8] II.B.4.a.1 To determine compliance with a rolling 12-month total the owner/operator shall calculate a new 12-month total by the twentieth day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production shall be determined by the belt scale on the initial feeder, vendor receipts, or other methods approved by the Director. The records of production shall be kept on a monthly basis. Supervisor monitoring and maintaining of an operations log shall determine tons of product. [R307-401-8] Status: In Compliance. For the rolling 12-month period from June 2023 - May 2024, a total of 204,715 tons of asphalt were produced. No asphalt was produced in January 2024. Asphalt production in December 2023 and February 2024 never exceeded 250 tons per hour. See the attached tables below for more information. II.B.4.b All exhaust air from the dryer drum shall be routed through the baghouse before venting to the atmosphere. The baghouse shall be sized to handle 72,000 ACFM. [R307-401-8] Status: In Compliance. According to Lakeview Rock Products, the baghouse is sized to handle 75,456 ACFM. II.B.4.c The manometer or magnehelic pressure gauge shall measure the differential pressure across the baghouse. The following operating parameters shall be maintained on the asphalt plant baghouse: 1. Static pressure differential across the baghouse shall be between 2 and 6 inches of water column. 2. The pressure drop reading shall be accurate within plus or minus one inches of water column. The pressure drop shall be monitored with equipment located such that an inspector/operator can safely read the output at any time. [R307-401-8] Status: In Compliance. Records reviewed of the differential pressure across the baghouse ranged generally within 2.6 inches of water column. II.B.4.d The amount of recycled asphalt used in the asphalt plant shall not exceed 40% of the total product at any time. [R307-401-8] II.B.4.d.1 Compliance shall be determined by the tons of recycled product introduced to the plant divided by the total tons production of the plant. Daily records maintained on site shall include: A. Total production B. Amount of recycled asphalt used in the total production C. Daily calculations of the percent recycled asphalt used in the total production. [R307-401-8] Status: In Compliance. See the attached month end totals for 2023. RAP did not exceed 40%. It typically resides in the 25% range.

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II.B.4.e Particulate emissions from the asphalt plant baghouse shall not exceed 0.024 grains/dscf for pit run material for PM10 and PM2.5 (0.030 grains/dscf for TSP), and 0.028 grains/dscf for recycled pit run asphalt pavement mix for PM10 and PM2.5 (0.035 grains/dscf for TSP). [ 40 CFR 60 Subpart I, R307-312, R307-401-8] Status: In Compliance. Stack testing was most recently performed on July 26, 2023. Stack test results for PM10 and PM2.5 were 0.00271 grains/dscf. See Stack Test review DAQC-1061-23 for additional information. II.B.4.e.1 Stack testing to show compliance with the emission limitations stated in the condition above shall be performed as specified below: A. PM10 shall be tested every three years, or sooner if directed by the Director, to show compliance with the emission limitations stated in the condition above. B. Initial compliance testing for TSP occurred on October 13, 2016. No additional TSP testing is required. C. Tests may be required if the source is suspected to be in violation with other conditions of this AO. Compliance testing shall not be required for both virgin and recycle asphalt materials during the same testing period. Testing shall be performed for the product being produced during the time of testing. [R307-401-8] II.B.4.e.2 The owner or operator shall notify the Director of the date, time and place of such testing at least 30 days prior to conducting any emission testing required under any part of UAC, R307. If determined necessary by the Director, the owner or operator shall attend a pretest conference. A source test protocol shall be submitted to DAQ when the testing notification is submitted to the Director. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, stack to be tested, and procedures to be used. A pretest conference shall be held, if directed by the Director. The pretest conference shall include representation from the owner/operator, the tester, and the Director. The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other methods as approved by the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location. [R307-401] II.B.4.e.3 PM10 testing shall be conducted in accordance with the following methods to measure filterable particulate emissions: 1. 40 CFR 51, Appendix M, Method 201 or Method 201A 2. Other EPA-approved testing method, as acceptable to the Director If other approved testing methods are used which cannot measure the PM10 fraction of the filterable particulate emissions, all of the filterable particulate emissions shall be considered PM10. Condensable particulate emissions shall use the following methods for measurement: 1. 40 CFR 51, Appendix M, Method 202 2. Other EPA-approved testing method, as acceptable to the Director. The condensable particulate emissions shall not be used for compliance demonstration, but shall be used for inventory purposes. [R307-401] II.B.4.e.4 Filterable PM2.5 emissions shall be determined by 40 CFR 51, Appendix M, Method 201A, or other EPA-approved testing method, as acceptable to the Director. [R307-312]
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II.B.4.e.5 The production rate during all compliance testing shall be no less than 90% of the maximum production achieved in the previous three (3) years. [R307-401] Status: In Compliance. All submitted records indicate compliance to all stack testing requirements. See Stack Test review DAQC-1061-23 for additional information. II.B.5 Site-Wide Fuel Requirements II.B.5.a The sulfur content of any fuel oil or diesel burned in all on-site equipment shall not exceed 15 ppm by weight. [R307-401-8] II.B.5.a.1 The sulfur content shall be determined by ASTM Method D-4294-89 or approved equivalent. Certification of the fuel oil shall be either by the source's own testing or test reports from the fuel marketer. The sulfur content certification or the test reports shall be available on-site for each load delivered. [R307-203] Status: In Compliance. The source operates using only ULSD. See the attached fuel description from HF Sinclair dated June 11, 2024. II.B.5.b The owner/operator shall only use natural gas as fuel in the hot mix asphalt plant dryer burner and hot oil heater. [R307-401-8] Status: In Compliance. Lakeview Rock Products only uses natural gas as fuel in the hot mix asphalt plant dryer burner and hot oil heater. II.B.6 All Haul Roads and Fugitive Dust Sources Requirements II.B.6.a Visible fugitive dust emissions from haul-road traffic and mobile equipment in operational areas shall not exceed 20% opacity. [R307-309-5] II.B.6.a.1 Visible emissions determinations for traffic sources 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. A. Six points, distributed along the length of the haul road or in the operational area, shall be chosen by the Director or the Director's representative. B. An opacity reading shall be made at each point when a vehicle passes the selected points. C. Opacity readings shall be made no less than one-half the vehicle length behind the vehicle and no less than one-half the height of the vehicle. D. The accumulated six readings shall be averaged for the compliance value. [R307-309-5] Status: In Compliance. No significant fugitive dust was observed on the haul roads or surrounding operational areas. See the attached VEO Form for additional information. II.B.6.b The owner/operator shall comply with a FDCP acceptable to the Director for control of all dust sources associated with the Lakeview Rock Products Main Pit. The FDCP shall be approved by the Director. The haul road speed shall be posted. [R307-309-6] Status: In Compliance. Lakeview Rock Products updated the Fugitive Dust Compliance Plan (FDCP) online on March 24, 2021. The haul road speed is posted as required. II.B.6.c The pit entry haul road shall be paved and shall be swept and spray cleaned as necessary to meet the opacity requirements listed in this AO. [R307-401-8] Status: In Compliance. The pit entry haul road was sprayed clean to meet the opacity requirements. The vehicle speed was posted as 10 miles per hour (mph).
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II.B.6.c.1 Records of sweeping and cleaning shall be kept for all periods when the plant is in operation. The records shall include the date, time, and the sweeping activity or area swept. Records shall be made available to the Director or the Director's representative upon request. [R307-401-8] Status: In Compliance. Lakeview Rock Products maintains records of sweeping and cleaning when the plant is in operation to include the date, time, and the sweeping activity or area swept. See the attached example logs from April 2024 - June 2024. II.B.6.d The owner/operator shall water spray all unpaved roads, storage piles, and operational areas that are used by mobile equipment to control fugitive dust. Sprays shall operate, as required, to maintain the opacity limits listed in this AO when the temperature is above freezing. [R307-401-8] II.B.6.d.1 Records of water treatment shall be kept for all periods when the plant is in operation. The records shall include the following items: A. Date of treatment B. Number of treatments made C. Rainfall received, if any D. Records of temperature if the temperature is below freezing. [R307-401-8] Status: In Compliance. Lakeview Rock Products maintains watering records to include the date of treatment, location of watering, and number of loads. See the attached example logs from April 2024 - June 2024. II.B.6.e The owner/operator shall comply with all applicable requirements of R307-309 for fugitive emission and fugitive dust sources. [R307-309] Status: In Compliance. No significant fugitive dust was observed on the haul roads or surrounding operational areas. See the attached VEO Form for additional information. The source operates according to FDCP.

Section III: APPLICABLE FEDERAL REQUIREMENTS

In addition to the requirements of this AO, all applicable provisions of the following federal programs
have been found to apply to this installation. This AO in no way releases the owner or operator from any
liability for compliance with all other applicable federal, state, and local regulations including UAC
R307.

NSPS (Part 60) IIII: Standards of Performance for Stationary Compression Ignition Internal Combustion
Engines

Status: In Compliance. Compliance with this subpart is satisfied by installing a certified engine,
maintaining and operating the engines in accordance with the manufacturer's instructions, installation
of a non-resettable hour meter, the use of ultra-low sulfur diesel, and maintaining records of use. All
information provided at the time of inspection indicate all diesel engines are properly maintained and
operated in accordance with this subpart. Two diesel engines are onsite – one was manufactured in 2009
and is rated at 216 hp. The other generator is rated at 1207 hp and was manufactured in 2015. See the
attached photos of the manufacturers’ plates.
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NSPS (Part 60) OOO: Standards of Performance for Nonmetallic Mineral Processing Plants

Status: In Compliance. See Condition II.B.1.b.2 in Section II for more details.
NSPS (Part 60) I: Standards of Performance for Hot Mix Asphalt Facilities

Status: In Compliance. Compliance with this subpart is satisfied by routine stack testing. Stack testing
was most recently completed on July 26, 2023. See Section II and DAQC-1061-23 for more details.

MACT (Part 63) ZZZZ: National Emissions Standards for Hazardous Air Pollutants for Stationary
Reciprocating Internal Combustion Engines

Status: This subpart applies to all generators. Maintenance occurs per manufacturer recommendations,
and the non-resettable hour meter is checked weekly. Only low-sulfur diesel is used in all of the
generators. Two diesel engines are onsite – one was manufactured in 2009 and is rated at 216 hp. The
other generator is rated at 1207 hp and were manufactured in 2015. See the attached photos of the
manufacturers’ plates.

AREA SOURCE RULES EVALUATION:

The following Area Source Rules were evaluated during this inspection:

Standards of Performance for New Stationary Sources [R307-210]
Status: Compliance with this area source rule is satisfied by compliance with Federal Requirements
NSPS (Part 60) Subparts IIII, OOO, and I. See Section III above for more information.
National Emission Standards for Hazardous Air Pollutants [R307-214]
Status: Compliance with this area source rule is satisfied by compliance with Federal Requirement
MACT (Part 63) Subpart ZZZZ. See Section III above for more information.
Nonattainment and Maintenance Areas for PM10: Emissions and Fugitive Emissions and Fugitive Dust
[R307-309]

Status: In Compliance. No significant fugitive dust was observed on the haul roads or surrounding
operational areas. See the attached VEO Form for additional information.

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EMISSION INVENTORY:
Listed below are the Actual Emissions Inventory provided from Lakeview Rock Products - North Salt
Lake Pit for the 2023 emissions reporting year. A comparison of the estimated total potential emissions
(PTE) on AO: DAQE-AN104390011-17, dated July 10, 2017, is provided.
PTE are supplied for supplemental purposes only.

Criteria Pollutant PTE tons/yr Actuals tons/yr
CO2 Equivalent 12136.00 N/A
Carbon Monoxide 83.53 14.76092
Nitrogen Oxides 22.05 5.09627
Particulate Matter - PM10 84.33 20.06431
Particulate Matter - PM2.5 20.39 4.29794
Sulfur Dioxide 3.62 0.34365
Volatile Organic Compounds 15.76 3.50285

Hazardous Air Pollutant PTE lbs/yr Actuals lbs/yr
2-Methynapthalene (CAS #91576) 64 2.66
Benzene (Including Benzene From Gasoline) (CAS #71432) 294 76.18
Ethyl Benzene (CAS #100414) 204 47.26
Formaldehyde (CAS #50000) 2360 619.38
Generic HAPs (CAS #GHAPS) 140 N/A
Hexane (CAS #110543) 698 273.16
Methyl Chloroform (1,1,1-Trichloroethane) (CAS #71556) 36 9.26
Naphthalene (CAS #91203) 71 0.98
Phosphorus (CAS #7723140) 21 N/A
Toluene (CAS #108883) 119 30.68
Xylenes (Isomers And Mixture) (CAS #1330207) 150 1.42

PREVIOUS ENFORCEMENT
ACTIONS: A Compliance Advisory (DAQC-1205-22) was issued on
September 14, 2022, for unpermitted equipment. The compliance
action was closed out with an Early Settlement Agreement
(DAQC-1409-22) issued on October 31, 2022. A Compliance
Advisory (DAQC-734-23) was issued on July 21, 2023, for
exceedances of opacity limits. The compliance action was closed
out with an Early Settlement Agreement (DAQC-901-23) on
August 29, 2023.

COMPLIANCE STATUS &
RECOMMENDATIONS: In regards to Approval Order (AO) DAQE-AN104390011-17,
dated July 10, 2017, the overall status is: Out of Compliance.
Unapproved equipment was observed on site at the time of
inspection. This included two grizzly feeders, a horizontal shaft
impactor, a 5' x 16' screen, and two diesel generators. A
Compliance Advisory (DAQC-681-24) was issued on July 10,
2024, for the unpermitted equipment. The source responded on
July 19, 2024.
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The DAQ met with source contacts regarding compliance issues
on August 13, 2024. An Early Settlement Agreement
(DAQC-1127-24) was issued on December 5, 2024. The DAQ
met again with source contacts on January 8, 2024. As a result of
that meeting, a Modified Early Settlement Agreement
(DAQC-031-25) was issued on January 16, 2025. The source
provided payment on February 18, 2025. A Signed Early
Settlement Agreement (DAQC-188-25) was issued on February
20, 2025. The source submitted a Notice of Intent to modify their
AO on February 28, 2025. No further compliance action is
recommended at this time.

HPV STATUS: Not Applicable.

RECOMMENDATION FOR
NEXT INSPECTION: Inspect at increased frequency. Check for new AO that includes
all unpermitted equipment. Steel-toed boots, safety glasses, high
vis clothing, and a hard hat are required PPE for the inspection.

NSR RECOMMENDATIONS: Work with source to update AO to include all on-site equipment.

ATTACHMENTS: VEO form, email correspondence, aggregate production, asphalt
production, blasting, diesel usage, winter tph on asphalt plant,
percent of RAP, ULSD verification, dust control records, OOO
verification, MSHA nozzle spray inspections, photos of
generators.
HF Sinclair Woods Cross Refining LLC
1070 W. 500 S, West Bountiful, UT 84087-1442
Certified By
Batch #171 Date 6/11/2024
Pipe line Sequence Local sales tank 47 Destination LOD #2 ULSD sales
ULSD #2
Specification Test Method Value Results
Min Max
Workmanship ASTM D 4176 Bright & Clear
Haze ASTM D4176 #2 Haze 1
API Gravity ASTM D 4052 30.0 40.8
Cetane Index ASTM D 4737 40.00 56.38
Color (before dye addition) ASTM D 1500 2.5 0.5
Flash Point, OF ASTM D 93 130 146
Distillation 10% pt, OF ASTM D 86 395.8
Distillation 50% pt, OF ASTM D 86 502.9
Distillation 90% pt, OF ASTM D 86 540.0 640.0 636.1
Distillation FBP, OF ASTM D 86 698.0 682.7
Sulfur, ppmw ASTM D 5453 10.00 3.90
Cloud Point, OF ASTM D 2500 30.0 26.9
Pour Point, OF ASTM D 97 15.0 1.0
Corrosion, 3 hrs @ 122 OF ASTM D 130 1 1A
Viscosity @ 104 OF, cSt ASTM D 445 1.900 3.400 2.479