Iggle piggle

Thank you everyone for your replies. The mean arsenic level is approx. 160ppm but some areas are 1200ppm and the plan is to re soil to 600mm and line with a permeable membrane, would this stop the arsenic moving and re contaminating the fresh soil ? The area is approx 7 acres with pH varying from 4.2 to 9.1. This is in Cornwall UK with an old tin mine within 150m but it is not clear if the contamination is from mine spoil or underlying rock. Borehole samples to 1m show random contamination from the top to the bottom of the samples with no clear pattern. At the higher levels does this pose a problem to health if you are in contact with the soil ?

Hi, I'm new here and I was wondering if anyone knows how dangerous arsenic is in a domestic garden environment? Would levels of 160 ppm in the soil make growing vegetables dangerous? Does anyone know how much of that arsenic is likely to move in the soil and water if the soil is disturbed? If the soil was moved a lot during construction could the arsenic move in any dust produced and how dangerous would that be to human health? I have no scientific background other than basic soil science in horticulture and I am finding it hard to get much information on contaminated ground. Thanks