15A NCAC 02D .2304 QUALIFICATION OF EMISSION REDUCTION CREDITS For purposes of calculating the amount of emission reduction that can be quantified as an emission reduction credit, the following procedures shall be followed: (1) (2) History Note: The source's average actual annual emissions before the emission reduction shall be calculated in tons per year. In calculating average actual annual emissions before the emission reduction, data from the 24-month period immediately preceding the reduction in emissions shall be used. The Director may allow the use of a different time period, not to exceed seven years immediately preceding the reduction in emissions if the owner or operator of the source documents that such period is more representative of normal source operation. The emission reduction credit generated by the emission reduction shall be calculated by subtracting the allowable annual emissions rate following the reduction from the average actual annual emissions prior to the reduction. Authority G.S. 143-215.3(a)(1); 143-215.107(a)(12); Eff. December 1, 2005.