This section contains technical and practical documentation for S-Risk© users. First, please
find below the general documentation.
Region-specific documentation is also available for Flanders/Brussels and Wallonia.
The user manual of the S-Risk web application describes the user interface and how to use it.
S-Risk basics (demo with S-Risk V1 interface)
Note discussing changes in important S-Risk parameters changes planned in 2019: Note on 2019 S-Risk parameter
This note describes the changes to soil ingestion parameters and risk parameters for chlorinated compounds.
Technical Guidance Document: S-Risk
This document describes the calculation models and parameter choices behind S-Risk FL/BRX in full detail.
Technical Guidance Document - Annex IV : S-Risk model equations - Annex IV
An addendum to the Technical Guidance Document, listing the default values for parameters used in the S-Risk FL/BRX model.
S-Risk in the Flemish soil remediation policy context: S-Risk infosessies - beleid - mei 2013
This document describes the decisions leading up to the development of S-Risk, and a first outline of the Flemish policy concerning S-Risk results in existing soil remediation projects.
S-Risk methodology & comparison with Vlier-Humaan: S-Risk infosessies - technisch - mei 2013
This document describes the models used in S-Risk and contrasts them with the earlier Vlier-Humaan model.
S-Risk 1.3 - Notes on changed parameters: Samenvatting wijzigingen S-Risk versie
This document describes the changes in parameters that were introduced with the release of S-Risk version 1.3, release on May 15, 2019.
Full report on the review of chlorinated compounds: Herziening van de bodemsaneringsnormen voor
dichloormethaan, tetrachloormethaan, trichlooretheen, 1,1,1-trichloorethaan en
This document reports on the review of risk parameters for chlorinated compounds, applied in S-Risk version 1.3 in May 2019.
See the version 1.3 release notes for a summary of these changes.
Report on soil remediation values for PFOS and PFOA: Proposal for soil remediation values for PFOS and
This document discusses the proposals for soil remedation values (SRV) for perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA). The corresponding substance data sheets can be found below.
These substances were added in the Flemish/Brussels version of S-Risk in version 1.3.1.
Adjusted proposal for soil remediation values for PFOS en PFOA: Bindend normenkader voor PFOS en PFOA
The provisional soil remediation standards for PFOS and PFOA, which entered into force in April 2022 and are currently applicable are found here. This document contains the current substance data sheets (also available below) based on the tolerable daily intake (TDI) of 20 ng/kg bw.d (US-EPA 2016).
At the end of 2020, the EFSA (European Food Safety Authority) published the tolerable weekly intake (TWI) of 4.4 ng/kg bw.d (or the tolerable daily intake (TDI) of 0.63 ng/kg bw.d) for the sum of 4 PFAS (PFOS, PFOA, PFNA and PFHxS). On 6 October 2022, VITO submitted an amended framework of standards for soil remediation and earthmoving to the Flemish Government. The document ‘Bindend Normenkader voor PFOS en PFOA’ (only available in Dutch) discusses the adjustment of the proposed soil remediation values for PFOS and PFOA based on the findings of the EFSA (2020) report. On 16 December 2022, the Government of Flanders approved at first reading the temporary action framework for the use of PFAS-containing soil materials in the context of earthmoving.
Pending final approval, adapted substance data sheets ('PFOS EFSA 2020' and 'PFOA EFSA 2020') were already provided in the Flemish/Brussels S-Risk version for PFOS and PFOA based on the proposed amendments. Since January 2023, new legal limits for food are available. These are also included in the substance data sheets. The corresponding substance data sheets can be found below.
During the transition period, soil remediation experts can already perform calculations for these new substances PFOS EFSA 2020 and PFOA EFSA 2020.
As soon as the temporary action framework is 'final', the current perfluorooctane sulphonic acid (PFOS) and perfluorooctanoic acid (PFOA) substance data sheets will be removed from S-Risk.
- Metals : English version / Nederlandstalige versie
- BTEXs : English version / Nederlandstalige versie
- Chlorinated aliphatics/-aromatics : English version / Nederlandstalige versie
- PAHs : English version / Nederlandstalige versie
- Alkanes & cyanides : English version / Nederlandstalige versie
- Oil fractions : English version / Nederlandstalige versie
- PFOS & PFOA : English version
- PFOS & PFOA EFSA 2020 : English version
Technical Guidance Document: S-Risk
This document describes the calculation models and parameter choices behind S-Risk WAL in full detail.
Technical Guidance Document - Annex III: model equations - Annex III
An addendum to the Technical Guidance Document, listing the default values for parameters used in the S-Risk WAL model.