Technical guides written by a contaminated land engineer, to go deeper into the calculation methods and regulatory doctrine used by GMEP tools: human health risk assessment (EQRS), vapor intrusion, hydrogeology and contaminated site management.
Definitions of the Hazard Quotient (QD) and Individual Excess Risk (ERI), calculation formulas, toxicological reference values (VTR), child ADAF factor, and acceptability thresholds consistent with the INERIS ERS 2021 methodology and ANSES 2018 doctrine.
Principle of the Johnson & Ettinger model (EPA 2004), attenuation factor α, transport equation, key parameters, substances of concern (VOCs, chlorinated solvents, PAHs) and precautions when comparing against field measurements.
Theis (confined aquifer) and Dupuit-Thiem (unconfined aquifer) equations, hydrogeological parameters (transmissivity, storativity), IOTA classification (heading 2.1.3.0, formerly R.214-1) and building a Water Law filing.
Definitions of the IEM (initial diagnosis), the ARR (residual risk analysis) and the EQRS, chronological sequencing, role of the conceptual site model and content of a management plan.
See also the GMEP software pricing or Eric Azulay's expertise.