15A NCAC 02D .0513 PARTICULATES FROM PORTLAND CEMENT PLANTS (a) Particulate matter from any Portland cement kiln shall: (1) (2) be reduced by at least 99.7 percent by weight before being discharged to the atmosphere; the 99.7-percent reduction shall be by air pollution control devices; and not exceed 0.327 pounds per barrel. (b) The emissions of particulate matter from any stacks, vent or outlets from all processes except Portland cement kilns shall be controlled by Rule .0515 of this Section. History Note: Authority G.S. 143-215.3(a)(1); 143-215.107(a)(5); Eff. February 1, 1976; Amended Eff. July 1, 1998; January 1, 1985.