Issues to be determined:-
Possible sources of contamination, What effect does this have on the people involved? Are the contaminants able to elicit the responses reported? Has this sort of thing happened before?
Identify Reason for contamination, How can these contaminants be identified? How can they be isolated/ collected?
Analysis techniques to identify contaminants. Identify methods, equipment, sample collection and preparation, possible contamination, rogue results, standards, blanks.
Identify source of contamination, levels acceptable or not? who is responsible, preventative measures, future considerations.
Final verdict to be determined is:-
Are the plantives able to claim compensation from any of the companies involved? and identify who they are able to claim from and why?