Agronomic Receptor Evaluation for Direct Soil Contact – Stage 1 & 2 (For historical purposes only)

Millennium EMS Solutions

February 2022

Executive Summary

The agronomic receptor evaluation for direct soil contact project has an overall objective of developing a scientifically defensible value for the minimum depth at which soil contamination could potentially affect agronomic crops in the Parkland region of Alberta. It is intended that this minimum depth be used to inform the depth below which soil remediation guidelines protective of the ecological direct contact pathway need not be applied. Stage 1 of this project MEMS and InnoTech (2018) developed background information and identified a suitable test species (alfalfa), test contaminant (sodium chloride) and experimental conditions for Stage 2.The second report summarizes the findings of the experimental work conducted in Stage 2 moving towards identifying an appropriate depth below which soil contamination is not expected to adversely affect agronomic crops grown in the Parkland region of Alberta. The full experimental findings are provided in Appendix A (Thacker, 2021).