“…These models are specified and estimated to establish a base case for comparison, and reflect conventional practice in frequency and regression analysis of pollution and safety incidents. For discussion and examples of this approach see Lanfear and Amstutz (1983), Anderson and LaBelle (1990, 1994), Fleming et al (1996), Iledare et al . (1997, 1998), Chunlin and Chengyu (1999), Shultz (1999), Shultz and Fischbeck (1999), Mearns et al (2001), Conchie and Donald (2006), Boehmer-Christiansen (2008), Malallah (2009), and Winter et al (2010).…”