Dear list members,
You may be interested to note that Atkins has just completed a series of comprehensive updates to the ATRISKsoil SSV service. This comprises one of the largest updates since their inception back in 2006 and our SSV database now stretches to 100 compounds presented in an easily readable format.
We have used the latest CLEA v1.071 software to derive updated SSVs based on C4SL exposure assumptions at 1% SOM for a sand soil type and at 6% SOM for a sandy loam based on 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 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 10 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.
We will also be reviewing a number of other contaminants across the next review period.
Access to the SSVs remains free for local authorities and government agencies (using a .gov account only). Further information can be found at www.atrisksoil.co.uk.
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