Steve - you might look at the CoP for the spreading of sewage sludge - this gives thresholds for metals for livestock and grassland which indirectly affects human health via consumption.
You might consider the new "Suitable for Use" thresholds that LQM are producing for public open spaces, you'd have to satisfy yourself that the human you're interested in is making a reasonable stab at closely simulating this exposure scenario.
Cheers
Clive
----Original message----
From : [log in to unmask]
Date : 16/10/2014 - 15:09 (GMTDT)
To : [log in to unmask]
Subject : Threshold values for metals in soils
Folks,
A colleague of mine is looking at overland flow on grassland after
biosolid application and wishes to obtain information on threshold
values for metals in soils before they are classified as contaminated.
The threshold criteria he is interested in is linked to human health
risk. Can anyone offer advice on sources of information for this. Thanks.
--
regards
-----------------
Dr Steve Thornton
Groundwater Protection and Restoration Group
Kroto Research Institute
North Campus
University of Sheffield
Broad Lane
Sheffield S3 7HQ
UK
Tel : 44 (0) 114 222 5744
Mobile : 07855 074692
Fax : 44 (0) 114 222 5701
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