“…Such average values (<100 g/m 2 day) fit those estimated in other Italian sites (Chiodini et al, 1995(Chiodini et al, , 1998. No hints of deep degassing can be inferred for the study area, as in general has been observed in some DDS throughout Italy (Chiodini et al, 1995(Chiodini et al, , 1998(Chiodini et al, , 2008Chiodini and Frondini, 2001;Cardellini et al, 2003;Voltattorni et al, 2009;Quattrocchi et al, 2009Quattrocchi et al, , 2010Quattrocchi et al, , 2011. Neither a particular trend of /CO 2 enrichment, nor evident alignment of anomalies has been revealed during this survey, discounting any hypothesis of deeply-derived leakages in the area (Evans et al, 2001).…”