Sec. 220-1.2. Particulate emissions from existing kilns and clinker coolers

Except as provided in section 220-1.3 of this Subpart, no person shall cause or allow emission of particulates to the outdoor atmosphere from a portland cement kiln or clinker cooler in excess of the following emission rates:

(a) for process weight per hour less than or equal to 100,000 pounds, E = 0.024P^0.665 where E is the emission rate in pounds per hour and P is the process weight per hour; or

(b) for process weight per hour in excess of 100,000 pounds, 0.05 grains per standard cubic foot of gas on a dry basis.