Q-2, r. 4.1 - Clean Air Regulation

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11. A grain processing facility, installed or put into operation after 14 November 1979, whose rated drying capacity exceeds 15 t per hour and whose grain moisture rate reduction is at least 15% must be situated more than 300 m from a residential zone established by the competent municipal authorities or from a dwelling situated in the direction of the prevailing wind, and more than 150 m from any other dwelling, except a dwelling owned by or leased to the owner or the operator of the grain processing facility.
For the purposes of this section, “prevailing wind” means the wind from August to November inclusively that prevails on average more than 20% of the time in a direction if a wind rose that has 8 compass directions is used, or more than 10% of the time in a direction if a wind rose that has 16 compass directions is used, as measured by the meteorological station nearest to the facility.
O.C. 501-2011, s. 11.