In the CanadaGAP Food Safety manuals, ‘pulp sludge’ and ‘soil amendments’ are defined as the following:
Pulp sludge: A solid residue that remains after wastewater is treated at pulp and paper mills. It is composed of input materials for making paper, which are primarily wood fibre, lime, clays, as well as excess organisms produced as part of the wastewater treatment process.
Soil amendments: Ashes, gypsum and liming materials added to the soil for the purpose of improving the chemical properties (e.g., pH) of the soil. If liming materials are derived from biosolids, see requirements for sewage sludge/biosolids. If liming materials are derived from pulp and paper waste, refer to the requirements for the application of pulp sludge.
The requirements for pulp sludge and soil amendments are found in Section 3.
Section 3.1 states: The person responsible purchases or selects:…
Pulp sludge that meets prevailing legislation (e.g., provincial regulations)
Soil amendments that meet prevailing legislation (e.g., provincial regulations)
Federally, the Fertilizers Act and regulations requires that all regulated fertilizer and supplement products imported into or sold in Canada must be safe for humans, plants, animals, and the environment. If any pulp sludge or soil amendments are being sold as a fertilizer it would be covered federally under the Fertilizers Act.
Provincial regulations/requirements vary by location. In some cases, provinces do not have specific regulations (these types of materials might not be used, or they might not have specific regulations/requirements). For some provinces only some of these types of products have additional requirements.
The following table outlines some provinces where there are requirements in place: