(1) No person shall cause or authorize the production, handling, transportation, or storage of any material unless reasonable precautions to control emissions of airborne particulate matter are taken. Such emissions of airborne particulate matter from any stationary source shall not exhibit an opacity of 20% or greater averaged over six consecutive minutes, except for emission of airborne particulate matter originating from any transfer ladle or operation engaged in the transfer of molten metal which was installed or operating prior to November 23, 1968.

(2) No person shall cause or authorize the use of any street, road, or parking lot without taking reasonable precautions to control emissions of airborne particulate matter.

(3) No person shall operate a construction site or demolition project unless reasonable precautions are taken to control emissions of airborne particulate matter. Such emissions of airborne particulate matter from any stationary source shall not exhibit an opacity of 20% or greater averaged over six consecutive minutes.

(4) Within any area designated nonattainment in 40 CFR 81.327 for PM, any person who owns or operates:

(a) any existing source of airborne particulate matter shall apply reasonably available control technology (RACT) ;

(b) any new source of airborne particulate matter that has a potential to emit less than 100 tons per year of particulate matter shall apply best available control technology (BACT) ;

(c) any new source of airborne particulate matter that has a potential to emit more than 100 tons per year of particulate matter shall apply lowest achievable emission rate (LAER) .

(5) The provisions of this rule shall not apply to emissions of airborne particulate matter originating from any activity or equipment associated with the use of agricultural land or the planting, production, harvesting, or storage of agricultural crops (this exemption does not apply to the processing of agricultural products by a commercial business) .