HomeMy WebLinkAboutDAQ-2025-0031321
DAQC-617-25
Site ID 15936 (B4)
MEMORANDUM
TO: STACK TEST FILE – STAKER PARSON COMPANIES – Spanish Valley
Aggregate and HMA Facility
THROUGH: Rik Ombach, Minor Source Oil and Gas Compliance Section Manager
FROM: Paul Bushman, Environmental Scientist
DATE: June 27, 2025
SUBJECT: Sources: Astec 600 TPH Hot Mix Asphalt Plant
Contact: Jeffery Cowlishaw: 385-405-4315
Location: Four Miles South of White Mesa on South Side of
Highway 191, San Juan County, Utah
Test Contractor: Montrose Air Quality Services, LLC
Permit/AO#: Approval Order (AO) DAQE-AN159360002-20 dated October
21, 2020
Action Code: TR
Subject: Review of stack test report received June 26, 2025
On June 26, 2025, Utah Division of Air Quality (DAQ) received a test report for an Astec 600 TPH Hot
Mix Asphalt Plant four miles south of White Mesa on South side of Highway 191, San Juan County,
Utah. Testing was performed May 20, 2025, to demonstrate compliance with the emission limits found in
condition II.B.5.h of AO DAQE-AN159360002-20. The calculated test results are:
Source Test Date Test
Method Pollutant Tester Results DAQ Results Limits
Astec 600
TPH Hot Mix
Asphalt Plant
May 20, 2025 5/202 PM10
0.0018 gr/dscf 0.0018 gr/dscf 0.01 gr/dscf
0.44 lb/hr 0.4379 lb/hr 3.2 lb/hr
DEVIATIONS: None.
CONCLUSION: The stack test report appears to be acceptable.
RECOMMENDATION: The emissions from the Astec 600 TPH Hot Mix Asphalt Plant should be
considered to have been in compliance with the emission limits of AO
DAQE-AN159360002-20 during testing.
ATTACHMENTS: DAQ stack test review excel spreadsheets; Staker Parson Companies
stack test report.