EARTH - Higher lead levels may lie just below soil surface

A study of data from hundreds of soil samples taken around six old water tower sites in southern Rhode Island finds that even when lead levels on the surface are low, concentrations can sometimes be greater at depths down to a foot. The findings inform efforts in Rhode Island to assess the effect of lead paint from old water towers on surrounding properties ...

http://www.sciencedaily.com/releases/2013/09/130918111748.ht