A geoexchange system is defined as a heat pump or heat exchange system having a horizontal or vertical closed-loop portion consisting of pipe buried in trenches, boreholes, or wells (ground-source), or submerged in a body of water (water-source), in which a heat exchange medium (fluid or vapor) is circulated and fully contained within the pipe or tubing. The purpose of the closed loop is to provide for the transfer of heat between the circulating fluid or vapor and the ground or water. Although these systems do not appropriate subsurface fluids, they do utilize the earth’s geothermal properties, therefore, requiring a permit.  Prior to issuance of a permit, the applicant must become certified.   Use Form GX-02 in applying for certification and Form GWS-72 for a permit to construct geoexchange system loop fields.