BS 10175 (7.6.2.1) states the more sensitive the receptors…the greater degree of confidence needed in the outcome of the risk assessment and the subsequent risk management. Greater Manchester Geological Unit said 104 boreholes and 209 trial pits (some from an investigation in the 1990s) were not enough for the sister former Jackson’s Brickyard site at Adswood, but for this school, directly over the old tip, 4 contamination pits and 11 boreholes on a similar-sized site were adequate. Why?
A 500+ pupil primary school and babies’ nursery – not sensitive receptors at all.
