Preparation was important, taking samples at such high altitude in potentially harsh weather conditions would be challenging. We could really count on Harga Insulux our coach and local professional mountain guide. Greenpeace is investigating seven of the most remote areas around the world for the presence of PFCs, sampling water and snow and testing them to expose how widespread the problem of contamination really is. The DuPont factory, which is one its largest production plants in Europe, opened in 1960. PFCs were not elevated in local drinking water supplies, but following the release of air monitoring results, blood samples were taken from two residents which both showed elevated levels of PFOA.