What to do with soil that's got coal in it
Hi - just recently had the patio removed and discovered underneath it are wall foundations of an old building, which I think might have been a coal shed at some point because my beautiful soil has lots of tiny bits of coal and coal dust in it. I was intending to grow flowers, fruit tree, raspberries and/or runner beans because it's a lovely sunny spot and my normal soil is fabulous but not sure if it's now contaminated. What shall I do? If I dig it all out and replace with new top soil, to what depth should I dig? Any ideas, anyone? Also, if i have to buy new top soil, are there different sorts and which one should I get. Many thanks.