Characterization of fill materials

Note: As requested by the responsible SDO, this NOI being reissued as the standard was in the initial stages of development for more than 12 months. An additional comment period of June 13 to July 5, 2023 (originally published on August 3, 2022).

Purpose:

This standard is intended to define a consistent methodology as part of the realization of studies to characterize the materials composing backfills of all types so their results allow to verify their suitability for future use.

Scope:

This standard includes the definition of meshing with regards to the risk associated to the fill materials up to the definition of the volumes via modelling based on the level and nature of the contamination, if applicable. This standard covers the contaminants dispersion, the environmental quality of soils and residual materials in a backfill as part of the realization of environmental characterizations studies.

This standard provides the steps and requirements with regards to:
1) definition of meshing with regards to the risk associated to the fill materials;
2) environmental sampling of the fill materials;
3) laboratory testing:
- grain-size test and microscopic analysis;
- chemical analysis of soils and/or residual materials;
4) definition of volumes via modelling based on the nature of the contamination;
5) reminder of the requirements and thresholds based on the use of the fil materials.

This standard covers fill materials of all types, except for the selfcompacting fill.