Probabilistic seismic hazard assessment in the framework of the 2018 decree for seismic risk assessment of SEVESO plants. A site-specific partially non ergodic approach is implemented in order to improve the classic ergodic PSHA by using 10 years of recordings from induced seismicity in the Lacq field. Moreover, the concept of zone of detailed investigation (ZID)  is introduced into the seismic source model for the PSHA in order to account for more than 50 years of local data on the gas field.