Agronomic Receptor Evaluation for Direct Soil Contact

The ecological direct contact pathway for soil salinity is currently ubiquitously applied to all land use scenarios at all depths; however, the Ecological Criteria Advisory Subgroup has agreed that at some depth, ecological exposure will no longer occur (CCME 2006). The depth at which the ecological direct contact pathway is no longer a relevant factor has not been determined. Remediation due to the assumption that the ecological direct contact pathway applies to salinity at all depths may lead to unnecessary surficial disturbance and degradation to overlying vegetation, without resulting in risk reduction.