In petrol-chemical plants, atmospheric tanks are largely used in order to store chemical products.
The bottom of these tanks, propping to the earth, is a critical element of the same tanks, as most significant cause of earth pollution (toxic products leak) due to corrosion phenomenon inside of them (products contained in tank) and outside them (plinth characteristics and climatic conditions).

Verify of tanks exercise is particularly important, it can be pursed through:
• leaks search
• inspection of tanks bottom

Related to considerable management expenses of a direct inspection activity (emptiness, drainage, re-cleaning), inspection problem of tanks has to be considered as pointed out in the 2 following steps:
• screening of the whole tanks park through Acoustics Emission technique;
• direct inspection of tanks, starting from those relieved in worse conditions, with Tank-Scan technique.