The requirements of this subpart apply only to kilns with process rates of at least the following: long dry kilns--12 tons per hour (TPH); long wet kilns--10 TPH; preheater kilns--16 TPH; precalciner and preheater/precalciner kilns--22 TPH and/or have NOx emissions greater than 1 ton per day.
S.C. Code Regs. § 61-62.99.B41