N.M. Code R. § 20.2.41.110
The owner or operator of a new nonferrous smelter shall not permit, cause, suffer or allow:
B. the release of fugitive sulfur emissions to the atmosphere unless best engineering practices, including practices listed in subsection E of 20.2.41.109 NMAC, are utilized to minimize the release of such fugitive emissions.
[11/30/95; 20.2.41.110 NMAC - Rn, 20 NMAC 2.41.110 10/31/02]