Any silo used to store hot mix asphalt or asphalt emulsion concrete mixtures which meets the following conditions of this section is permitted by rule:     
       (1) no cutback asphalt mixtures are stored;      
       (2) for silos on location for more than six months, all truck traffic areas are paved and cleaned as necessary to achieve maximum control of dust emissions and for those silos on location for six months or less, the truck traffic areas are sprinkled with water and/or chemicals as necessary to achieve maximum control of dust emissions;      
       (3) fuel used for heating the silo is sweet natural gas as defined in Chapter 101 of this title (relating to General Air Quality Rules) or liquid petroleum gas or first run refinery grade diesel or Number 2 fuel oil that is not a blend containing waste oils or solvents and that contains less that 0.5% by weight sulfur;      
       (4) the silo(s) is located at least 300 feet from any recreational area, school, residence, or other structure not occupied or used solely by the owner of the property upon which the silo(s) is located;      
       (5) before construction begins, written site approval is received from the executive director and the facility is registered with the commission's Office of Permitting, Remediation, and Registration in Austin using Form PI-7.      
     Source Note:        The provisions of this §106.150 adopted to be effective March 14, 1997, 22 TexReg 2439; amended to be effective September 4, 2000, 25 TexReg 8653