R 325.10819 Well casing in rock formation.

Rule 819. (1) In an area where a well is to be developed in fractured, jointed, or cavernous rock, the well shall not be approved as a production well unless all of the following conditions exist: (a) Adequate protective material above the aquifer. (b) No evidence of aquifer contamination. (c) No direct flow from surface or near surface sources to the rock aquifer. (2) The department may also approve a well developed in fractured, jointed, or cavernous rock based on special well construction features and a hydrogeologic study.