N.M. Code R. § 20.2.19.110 – Processing Equipment and Stacks

A. The owner or operator of potash, salt or sodium sulfate processing equipment shall not install or utilize any equipment or mechanism which increases the volume of gases emitted from a stack or stacks so as to decrease the apparent concentration of particulate matter within the gas stream so as to circumvent the requirements of subsection A of 20.2.19.109 NMAC above or increase the allowable emission rate as specified within subsection D of 20.2.19.109 NMAC.
B. The owner or operator of potash, salt or sodium sulfate processing equipment shall not permit, cause, suffer or allow emissions of particulate matter to the atmosphere except through stacks equipped with sampling ports and platforms in such number, location and size to allow accurate sampling to be performed. Stack height shall meet standards for good engineering practice. When it is not feasible to direct certain emissions through a stack, the owner or operator must utilize best engineering practices to minimize the release of fugitive particulate matter emissions to the atmosphere.
C. Where a stack or stacks regulated by subsection B or C of 20.2.19.109 NMAC also carry discharge gases from equipment regulated by subsection D of 20.2.19.109 NMAC, the allowable emission limit for the stack or stacks shall be increased by the allowable emission rate for the volume of discharge gases arising from the equipment regulated by subsection D of 20.2.19.109 NMAC. The additional allowed emissions shall be calculated as specified within subsection D of 20.2.19.109 NMAC based upon a determination of the volume of discharge gases prior to the point at which they are combined with discharged gases from equipment regulated by subsections B or C of 20.2.19.109 NMAC. In no case shall the allowable emissions from a stack or stacks which carry combined discharge gases exceed the sum of the allowable emission if the discharge gases were not combined.
[11/30/95; 20.2.19.110 NMAC - Rn, 20 NMAC 2.19.110 10/31/02]