An inverse analysis method for characterizing diffusion of vapor from an underground source of volatile contaminant using data taken by an in-situ sensor. The method uses one-dimensional solutions to the diffusion equation in Cartesian, cylindrical, or spherical coordinates for isotropic and homogenous...http://www.google.de/patents/US7003405?utm_source=gb-gplus-sharePatent US7003405 - Methods for characterizing subsurface volatile contaminants using in-situ sensors
