NASM Odour Guide for Ontario Regulation 267/03 made under the Nutrient Management Act, 2002
Section 4.0: Odour Categories
The odour category determines the NASM application setback requirements to individual dwellings, residential areas and land with commercial, community or institutional uses. The regulation sets out three categories that are related to odour. These are odour category 1, (OC1), odour category 2 (OC2), and odour category 3 (OC3). Each category in the regulation is defined as follows:
In the development of a NASM Plan, the certified NASM plan developer must determine the odour category of the NASM using one of 3 methods set out in this guide.
4.1 Basic Method: NASM Odour Category Table (Section 5 of this Guide)
This method to be used in cases where the NASM is listed in the NASM Odour Category Table, Table 3 of the document titled Nutrient Management Tables1 and the proponent is in agreement with the categorization.,
If the NASM is listed in the NASM Odour Category Table, but the specified odour detection threshold is believed by the proponent to be different than the odour detection threshold as set out in the heading under which the NASM is listed, one of the other methods listed in sections 6, 7 or 8 can be used to determine the category.
4.2 Procedure to Assign or Reassess and Assign NASM Odour Category (Director's Assignment) (Section 6 of this Guide)
This method allows the Director to assign an odour category to a material not listed in the NASM Odour Category Table based on his/her knowledge of the NASM and similar types of NASM.
This method may also apply where the proponent and the Director do not agree on the assigned odour category as outlined in the Basic Method or in cases where the proponent and the Director do not agree on the revised NASM odour category. The odour assessment test process described in sections 7 and 8 of the guide can then be used to assist in determining the NASM odour category.
This method can be used where the proponent and the Director do not agree on the NASM odour category, the NASM odour category can be determined using the Odour Assessment Test process described in section 7 and 8 of the guide.
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