2012 NASM Odour Guide for Ontario Regulation 267/03 made under the Nutrient Management Act, 2002

Part 1 - Definitions

For the purpose of this Guide, the following definitions apply:

"Anaerobic digestion output", as defined in O. Reg. 267/03, means any solid or liquid material that results from the treatment of anaerobic digestion materials in a mixed anaerobic digestion facility;

"Certified NASM plan developer" means a person responsible for preparing the NASM plan, who holds a NASM Plan Development certificate issued under Section 102 of O.Reg 267/03

"Commercial, community or institutional use" as defined in O. Reg. 267/03 means any commercial, community or institutional use, including without limitation the use of land for,

  • an office building,
  • a hotel, motel, hostel or similar type of accommodation,
  • an overnight camp or overnight campgrounds,
  • indoor recreational or sporting activities,
  • indoor gatherings for civic, religious or social purposes,
  • indoor performing arts activities,
  • a railway station, airport passenger terminal or other embarkation or debarkation point for travellers,
  • a day care centre,
  • educational purposes, including a school, college, university, private career college or associated residence,
  • a health care facility,
  • a penitentiary, jail or other place of custody or detention.

"Director", as defined in the Nutrient Management Act, 2002, means a Director appointed under subsection 3 (1) of the Act;

"DT" in reference to a sample, means, the dilution factor at which the sample has a 50% probability of being detected by an odour panel under the conditions of the odour assessment test as detailed in this guide.

"Dwelling", as defined in O. Reg. 267/03, means a structure that is used as a residence, including a mobile home or a seasonal home, but not including a structure that is in a residential area;

"Guide" means this document;

"NASM plan", as defined in O.Reg. 267/03, means a nutrient management plan for the management of NASM and other nutrients that may be applied to NASM application areas or stored in NASM storage facilities;

"Neutral gas" means air or nitrogen that is treated in such a way that it is as odourless as technically possible and that does not, according to panel members, interfere with the odour under investigation;

"non-agricultural source material" or "NASM", as defined in O. Reg. 267/03

"Nutrient management plan", as defined in the Nutrient Management Act, 2002, means a plan for the management of materials containing nutrients that may be applied to lands, which plan is prepared in accordance with the regulations;

"Nutrient Management Tables" means the document of that name, as amended from time to time, prepared by the Ministry of Agriculture, Food and Rural Affairs and the Ministry of the Environment for the purposes of the NASM Odour Guide and the Nutrient Management Protocol

"Odour detection threshold" means the dilution ratio at which a sample has a 50% probability of being detected by an odour evaluation panel;

"Odour evaluation panel" means a panel of a minimum of 6 odour evaluation panel members;

"Odour evaluation panel member" means an assessor who is qualified to judge samples of odourous gas, using dynamic olfactometry within the scope of European Standard EN 13725:2003;

"Odour unit (OU)" One odour unit is the amount of odourant(s) present in one cubic meter of neutral gas (measurements are room temperature (20°C) and normal atmospheric pressure (101.3 kPa) calculated on a wet weight basis) at the odour detection threshold determined by the odour evaluation panel and for the purposes of this Guide are the equivalent of one European Odour Unit;

"Pulp and paper biosolids", as defined in O. Reg. 267/03, means solid or liquid material that results from the treatment of wastewater generated by a manufacturer of pulp, paper, recycled paper or paper products including corrugated cardboard;

"Residential area", as defined in O. Reg. 267/03, means an area in which there are four or more lots of not more than one hectare,

  • that are adjacent to each other or not separated by anything other than a road allowance or right of way, and
  • on each of which there is a residential building;

"Sewage biosolids", as defined in O. Reg. 267/03, means the residue from a sewage treatment works following treatment of sewage and removal of effluent


For more information:
Toll Free: 1-877-424-1300
E-mail: ag.info.omafra@ontario.ca
Author: OMAFRA Staff
Creation Date: 25 July 2012
Last Reviewed: 25 July 2012