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RULE §106.146Soil Stabilization Plants

Any soil stabilization facility that operates according to the following conditions of this section is permitted by rule.

  (1) All bulk storage silos shall be equipped with fabric filter(s) having a maximum filtering velocity of 4.0 feet per minute (ft/min) with mechanical cleaning or 7.0 ft/min with automatic air cleaning.

  (2) All conveyor belts transferring dry material to the pug mill shall be top covered.

  (3) The pug mill used to mix the materials shall be covered.

  (4) All permanent in-plant roads and vehicle work areas shall be watered, oiled, or paved and cleaned as necessary to achieve maximum control of dust emissions.

  (5) An audible and/or visible mechanism shall be installed on the storage silo(s) to notify operators that the silo is full.

  (6) All stockpiles shall be sprinkled with water and/or chemicals as necessary to achieve maximum control of dust emissions.

  (7) When emulsified asphalt is used as the stabilizing admixture, the emulsified asphalt shall be stored in a container used exclusively for emulsified asphalt storage. Transfer of emulsified asphalt from the storage tank to the pug mill shall be accomplished by means of a pump and metering device.

  (8) Before construction of the facility begins, written site approval shall be received from the executive director and the facility shall be registered with the commission's Office of Permitting, Remediating, and Registration in Austin using Form PI-7.

  (9) The facility shall be located at least 300 feet from any recreational area, school, residence, or other structure not occupied or used solely by the owner of the facility or the owner of the property upon which the facility is located. This distance limitation does not apply to structures within the boundaries of the project for which the facility is to process stabilized soil when the facility is located on or contiguous to the project.

Source Note: The provisions of this §106.146 adopted to be effective March 14, 1997, 22 TexReg 2439; amended to be effective September 4, 2000, 25 TexReg 8653

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