‘Sec. 1. 38 MRSA §585-B, sub-§5, as amended by PL 2009, c. 338, §1, is further amended to read:
An air emission source may apply to the board for an extension or modification of the 11.4-kilogram, or 25-pound, limit as follows.
Pending a decision on an application for an extension or a license modification under this subsection, the 15.9-kilogram, or 35-pound, limit applies to the emission source.
Notwithstanding the January 1, 2000 compliance date in this subsection, a resource recovery facility that is subject to an emissions limit for mercury adopted by rule by the board before January 1, 2000 shall comply with the 45.4-kilogram, or 100-pound, mercury emissions limit after December 19, 2000.
For determining compliance with this subsection, the results of multiple stack tests may be averaged in accordance with guidance provided by the department.’