Site News & Updates


Major SSV Update – June 2017
Thursday, 22 June 2017 09:15

We are pleased to announce that we have completed our comprehensive update to the ATRISKsoil SSVs.

This comprises one of the largest updates since their inception back in 2006 and our SSV database now stretches to 100 compounds presented in a new easily readable format.

 

We have used the latest CLEA v1.071 software to derive updated SSVs based on Category 4 Screening Level (C4SL)

exposure assumptions at 1% Soil Organic Matter (SOM) for a sand soil and 6% SOM for a sandy loam soil type for the following C4SL standard land uses:

 

  • residential with consumption of home grown produce;
  • residential without consumption of home grown produce;
  • commercial;
  • public open space (residential);
  • public open space (parks); and,
  • allotments (6% SOM sandy loam only).

 

What makes the SSVs unique is that for residential and allotments land uses we have calculated the predicted exposure from each home grown produce type. The top two produce groups that result in the highest predicted exposure are set at the 90th percentile consumption rates and the remaining produce groups are set at the mean consumption rate. This method, as detailed in the C4SL Project Methodology documentation, has been adopted to ensure that the SSVs are not overly conservative but remain sufficiently precautionary.

 

We have also reviewed and updated the toxicological parameters and data sheets for the following ten contaminants:

 

  • Beryllium;
  • Chromium III;
  • Chromium VI;
  • Nickel;
  • 1,2-Dichloroethane;
  • Trichloroethene;
  • 1,1,1-Trichloroethane;
  • Carbon Tetrachloride;
  • 1,1,2,2-Tetrachloroethane; and,
  • 1,1,1,2-Tetrachloroethane.

 

You will find further information on the use of SSVs and their derivation in our accompanying guidance documentation.


Access to the SSVs remains free for local authorities and government agencies (.gov accounts only) and for commercial subscribers we have frozen the subscription price.

 

Please click here to subscribe to the ATRISKsoil Service.

 

If you have any queries, please Contact Us. A new and updated FAQ will be provided for the most popular questions we receive.

Please also get in touch for information on our training or risk assessment services.

What makes the SSVs unique is that we have also calculated the home grown produce types that result in the highest predicted exposure to contamination. Produce groups that result in the highest predicted exposure are set at the 90th percentile consumption rates and the remainder are set at the mean consumption rate. This method has been adopted, as set out in the C4SL Project Methodology, to ensure that the SSVs are not overly conservative but remain sufficiently precautionary.

Last Updated on Tuesday, 27 June 2017 14:15