Restrictions, maximum sustained slope and runoff potential
 39. (1) No person shall apply GNF to land at a rate that exceeds 130 cubic metres per hectare within a 24-hour period unless the following conditions are met: 1. The area to which the GNF is applied is subject to a GNF plan. 2. During the period that begins on May 16 in any year and ends on September 30 in the same year, the amount of GNF applied within a 24-hour period does not exceed the lower of, i. the 24-hour maximum determined in accordance with the GNF Management Protocol, and ii. 250 cubic metres per hectare. 3. If the maximum sustained slope of the area is greater than 4 per cent but does not exceed 8 per cent, and the soil belongs to the hydrological soil group C or D, the GNF is applied at an hourly rate that does not exceed 15 mm/hour. 4. If the maximum sustained slope of the area is greater than 8 per cent but does not exceed 12 per cent, the GNF is applied at an hourly rate that does not exceed 5 mm/hour. O. Reg. 300/14, s.39 (1); O. Reg. 234/15, s. 12. (2) During the period that begins on October 1 in any year and ends on May 15 in the following year, (a) no person shall apply GNF to land within 150 metres from the top of the bank of surface water, if the runoff potential of the area, as determined under subsection (4), is very high; and (b) no person shall apply GNF to land within 150 metres from the top of the bank of surface water at a rate in excess of that determined under the Table to subsection (3), if the runoff potential of the area, as determined under subsection (4), is not very high. (3) For the purposes of clause (2) (b), if the runoff potential of an area, as determined under subsection (4), is that set out in Column 1 of the Table to this subsection, the maximum rate within a 24-hour period for the land application of GNF to that area is the rate set out, (a) in Column 2 opposite the runoff potential, if the GNF is applied to the surface of the land; and (b) in Column 3 opposite the runoff potential, if the GNF is injected, incorporated within 24 hours after the end of the land application or if the land is pre-tilled no more than seven days before the application. TABLE   maximum rate of land application (October 1 to May 15)  Item   Column 1 Runoff potential of area of land   Column 2 Maximum rate (application to surface), in cubic metres per hectare   Column 3 Maximum rate (injection, incorporation or pre-tilled land), in cubic metres per hectare 

  1.   High   50   75 

  2.   Moderate   75   100 

  3.   Low   100   130 

  4.   Very low   130   130 (4) For the purposes of this section, the runoff potential of an area of land with soil of the hydrologic soil group set out in Column 1 of the Table to this subsection is the runoff potential set out, (a) in Column 2, if the maximum sustained slope of the area where the GNF is applied is at least 3 per cent but less than 6 per cent; (b) in Column 3, if the maximum sustained slope of the area where the GNF is applied is at least 6 per cent but less than 9 per cent; or (c) in Column 4, if the maximum sustained slope of the area where the GNF is applied is at least 9 per cent but less than 12 per cent. TABLE   runoff potential (October 1 to May 15)  Item   Column 1   Hydrologic soil group   Column 2   Runoff potential if maximum sustained slope is at least 3 per cent but less than 6 per cent   Column 3   Runoff potential if maximum sustained slope is at least 6 per cent but less than 9 per cent   Column 4   Runoff potential if maximum sustained slope is at least 9 per cent but less than 12 per cent 

  1.   A   Very low   Low   High 

  2.   B   Low   Moderate   High 

  3.   C   Moderate   High   Very high 

  4.   D   High   High   Very high