Volatile Organic Compound (VOC) Concentration Limits for Architectural Coatings Regulations

Marginal note:General formula

• 12 (1) Subject to subsection (2), the VOC concentration of an architectural coating set out in the schedule, diluted to the maximum recommendation of the manufacturer, importer or seller, excluding the volume of any water and excluded compounds, must be determined using the following equation:

  VOC concentration = (Ws - Ww - Wec) ÷ (Vm - Ww - Vec)

  where

  VOC concentration

  is the VOC concentration of an architectural coating, in grams of VOC per litre of coating;

  Ws

  is the weight of volatiles, in grams;

  Ww

  is the weight of water, in grams;

  Wec

  is the weight of excluded compounds, in grams;

  Vm

  is the volume of architectural coating, in litres;

  Vw

  is the volume of water, in litres; and

  Vec

  is the volume of excluded compounds, in litres.

• Marginal note:Low solids coating

  (2) The VOC concentration of a low solids coating set out in the schedule, diluted to the maximum recommendation of the manufacturer, importer or seller, including the volume of any water and excluded compounds, must be determined using the following equation:

  VOC_ls concentration = (Ws - Ww - Wec) ÷ Vm

  where

  VOC_ls concentration

  is the VOC concentration of a low solids (ls) coating, in grams of VOC per litre of coating,

  Ws

  is the weight of volatiles, in grams,

  Ww

  is the weight of water, in grams,

  Wec

  is the weight of excluded compounds, in grams, and

  Vm

  is the volume of architectural coating, in litres.

• Marginal note:Colourant

  (3) The VOC concentration of an architectural coating must be determined excluding any colourant that is added after the tint base is manufactured or imported, as the case may be, and packaged for sale.