s-risk's blog

S-Risk offline for update

Coming Tuesday, September 13, additional measures will be implemented on the S-Risk platform, intended to resolve the recent communication problems between the web browser and the server system of S-Risk. For this reason, the S-Risk web application will be temporarily unavailable between 12 am and 1 pm. The implemented solution will be evaluated by us after two weeks. Feedback from you on S-Risk performance and response times during this period is highly appreciated!

Please communicate this further to all S-Risk users in your company, so this can be taken into account when planning S-Risk simulation work.

New and updated FAQ entries

We have added more FAQ entries and updated existing ones, based on the feedback we have received via the S-Risk helpdesk.

FAQ entries updated:

  • Why does S-Risk give a warning message for a calculated critical concentration in application I or III? (replaces “Why does S-Risk sometimes fail to find critical soil concentrations?”)
  • What are the browser or network requirements for running S-Risk?
  • How to simulate the presence of a paved surface?
  • Why can’t I customize the properties for copper, nickel, mercury, zinc or lead?

New FAQ entries:

  • Why do RI (or ExCR) and CI results differ for volatile substances?
  • How to deal with a contamination that is only partially situated below a building?
  • Why do mercury, copper, nickel and lead simulations sometimes give counterintuitive results?

Communication issues between browser and server - solution in preparation

We are currently preparing a solution to fix the communication issues between the web browser and our server system. Therefore, we sometimes need to make use of the production server system. This may lead to temporary slow responses of S-Risk in your web browser, appearing like the system is not responding or hanging. In most cases, S-Risk will work again after refreshing your browser page (using the Refresh button on your browser or the F5 key). We thank you for your patience while we work out a solution.

S-Risk training on October 13, 2016

We will organise a next S-Risk training session on October 13, 2016. For more information on the training programme or how to register, see our Events page.

User manual updated

The S-Risk user manual has been updated to reflect the latest changes introduced with S-Risk 1.1.5. You can find English and Dutch versions on our Documents page.

Communication issues between web browser and server system

At the moment, we experience communication issues between the web browser and our server system. This may lead to timeouts in your web browser, appearing like the system is not responding or hanging. In most cases, S-Risk will work again after refreshing your browser page (using the Refresh button on your browser or the F5 key). Thank you for your patience while we search for a solution.

S-Risk updated to version 1.1.5

This morning, S-Risk has been updated to version 1.1.5. This release introduces a major overhaul of the calculation backend for applications I and III and a number of fixes and improvements in reports and user interface.

More details can be found on our Release notes page.

Substance data sheets available in English

The substance data sheets are now available in English. See our Documents page for the relevant links!

S-Risk 1.1.5

Released on June 30, 2016.

List of changes in this release

S-Risk 1.1.5 introduces the new optimization backend for applications 1 and 3, and a number of smaller fixes in the user interface.

The new optimization algorithm is a major improvement for the calculation of critical concentrations. It is better at finding the relevant critical concentrations, more capable of dealing with nontrivial RI functions and runs significantly faster than the old algorithm.

Full list of changes in this release:

  • complete overhaul of optimization backend - applications I & III are faster and more robust
  • optimization error messages and remarks have been formulated to be clearer and more user-friendly, both for the older optimization algorithm as well as the new one
  • optimization error messages and comments are now shown in the summary report, too
  • default application type for new simulations is now application II
  • numbers reported in the "exposure overview" in the in-browser report are now consistent with the extended PDF report
  • better tuning of CI & RI calculations and critical concentrations in function of enabled exposure routes
  • improved handling of route enabling/disabling: dermal exposure via water and inhalation via bathroom air are now systematically coupled
  • reports on optimization results will show warnings for metals based on non-standard models, and suggest to double check with the Graph tab
  • renamed region "Flanders" to "Flanders/Brussels", as the model and parameterization is valid for both regions
  • region indication is now prominently visible in the application page header
  • fixed situations where the summary report wouldn't show up after model calculations
  • entering 0 for soil pH, organic matter or clay percentage will raise an error message now
  • the extended & printed summary report now also include the simulation label
  • lots of smaller fixes for text labels in the user interface and reports


Released on February 2nd, 2016.

List of changes in this release

S-Risk release is a bugfix release, fixing a problem introduced with the previous 1.1.4 release.
In 1.1.4, adjustments were made to make the outdoor air model more consistent with user-provided soil air measurements (see item 2 in Model adjustments in the 1.1.4 release notes). These adjustments introduced a new problem concerning volatilization from groundwater to outdoor air, of importance to simulations where groundwater contamination is determining outdoor air concentrations and outdoor air is determining for the global risks.


Subscribe to RSS - s-risk's blog