This document can be more clearly read here –

The contamination ‘experts’ (Council funded Greater Manchester Geological Unit) dug 4 trial pits at the opposite end of the site where the school was to be going. 50% of these paltry 4 trial pits showed they were contamination hotspots.

It was decided to protect children at the school from these contamination hotspots by means of “prickly bushes”. Our Friends of the Earth expert pointed out this was an unsuitable way of dealing with contamination. The plants would take up the contaminants, lose their leaves and die. and be no protection for the children. Don’t be “vexatious” the LibDems said – and they still do.

Trial Pit 01/05, TP02/05, TP03/05 and TP04/05