DAQ-2024-010587

FACT SHEET
R307-313 VOC and Blue Smoke Controls for
Hot Mix Asphalt Plants
Overview
The Utah Division of Air Quality Rule R307-313 establishes
emission controls and work practice standards for the emissions
of blue smoke and volatile organic compounds (VOC) from hot
mix asphalt plants and associated oil storage tanks. The rule
applies to owners and operators located in Salt Lake, Davis,
Weber, Utah, and Tooele counties with an annual production
level greater than or equal to 250,000 tons of hot mix asphalt
per rolling 12-month period. The owners and operators of hot
mix asphalt plants subject to Rule R307-313 shall comply by May
1, 2025.

Exclusions
Warm mix asphalt production shall not be included in the
applicable annual production level in Rule R307-313.

Requirements
The owner or operator shall install and operate emission capture
and control systems that capture and reduce blue smoke
emissions from dryers, conveyors, silos, and load out areas at all
times during the production of asphalt products. All visible
emissions from emission points shall not exceed 10% opacity.

Storage tanks shall be equipped with VOC capture and control
systems such as a condenser and a carbon-filled vessel. All seals
and gaskets associated with tanks, capture and control systems shall
be properly maintained with no visible holes, tears, or other
openings in any seal. Except during time of tank filling, emission
points shall operate with no visible emissions.

Record Keeping
The owner or operator shall retain a copy of the manufacturer's recommendations. Establish a plan for
scheduled maintenance. Maintain records showing proper operation and maintenance. Maintain
records of annual production of hot mix asphalt, of warm mix asphalt products, and the temperature at
which the products were produced. These records shall be stored for at least 2 years and shall be made
available to the director upon request.

Utah Division of Air Quality
July 2023

Contact
[phone]
General Air Quality information,
regulations, and contact information:
https://deq.utah.gov/division-air-quality

This fact sheet provides general
information regarding VOC and Blue
Smoke Controls for Hot Mix Asphalt
Plants. See https://adminrules.utah.gov/public/home for the entire rule.
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