15A NCAC 02D .0509. PARTICULATES FROM MICA OR FELDSPAR PROCESSING PLANTS

(a)  The allowable emission rate for particulate matter resulting from the processing of mica or feldspar that are discharged from any chimney, stack, vent, or outlet into the atmosphere shall not exceed the level calculated with the equation E = 4(P)^0.677 calculated to three significant figures for process rates less than or equal to 30 tons per hour.  For process rates greater than 30 tons per hour but less than 1,000 tons per hour, the allowable emission rate for particulate matter shall not exceed the level calculated with the equation E = 20.421(P)^0.1977 calculated to three significant figures.  For process rates greater than or equal to 1,000 tons per hour but less than 3,000 tons per hour, the allowable emission rate for particulate matter shall not exceed the level calculated with the equation E = 38.147(P)^0.1072 calculated to three significant figures.  The allowable emission rate shall be 90.0 pounds per hour for process weight rates equal to or greater than 3,000 tons per hour.  For the purpose of these equations, "E" equals the maximum allowable emission rate for particulate matter in pounds per hour and "P" equals the process weight rate in tons per hour.

(b)  Fugitive non-process dust emissions shall be controlled by Rule .0540 of this Section.

(c)  The owner or operator of any mica or feldspar plant shall control process-generated emissions:

(1)           from crushers with wet suppression, and

(2)           from conveyors, screens, and transfer points,

such that the applicable opacity standards in Rule .0521 or .0524, of this Section are not exceeded.

 

History Note:        Authority G.S. 143-215.3(a)(1); 143-215.107(a)(5);

Eff. February 1, 1976;

Amended Eff. April 1, 2003; July 1, 1998; April 1, 1986; January 1, 1985.