Fig. 6f–i shows how the four siting alternatives (S1, S2, S3 and S4) were identified starting from the macro-areas identified in the previous step. The identification was performed using the penalizing and preferential criteria reported in Table 2 (see Facility F1) and a punctual verification of the excluding criteria with data of major details compared with those of the macro-siting phase was also provided. Finally, a field inspection was performed.