“…Various editions of Surfer 8@ have been applied to modeling and evaluation of groundwater contamination and other environmental data (Konderla and Hawrysz, 1994;Otvos, Pazmandi, and Tuba, 2003;Shan and Stephens, 1994;Vigneresse, 1994;Woodard, Harris, and Breazeale, 1996). Also, reported applications have typically used Surfer 8@ as an interface with other software rather than as a stand-alone analytical tool (Lu and Amter, 1992;Marschallinger, 1991;Yan, Landry, and Tate, 1994). The authors' experience suggests that Surfer 8@ is widely used, but this use is not well documented, with only limited reference to its application to environmental data existing in the scientific literature.…”