The owner or operator of an indoor ice arena must maintain acceptable air quality conditions at all times in areas of the arena building that are open to the public. Such conditions are defined as: one-hour average air concentration of not more than 20 parts of carbon monoxide per one million parts of air by volume (20 ppm), and one-hour average air concentrations of not more than 0.3 parts of nitrogen dioxide per one million parts of air by volume (0.3 ppm).
MS s 144.1222
37 SR 1663
June 3, 2013
Official Publication of the State of Minnesota
Revisor of Statutes