The residents blamed the contamination on the outlets of Power Station "B". The sample was collected at the point where the red circle is situated.
Does Power Station "A" have a case to answer? Explain.
Do these results let Power Station "B" off the hook? Explain?
If a sample with contaminants was taken from where the green circle is situated would this prove conclusively that Power station "B" is pouring metals into the river? Explain.
Suggest where on the map should a sample be taken to prove that Power Station "B" is not contaminating the river?