R 325.10805 Retroactivity of rules; significant changes or major repairs made to existing well; utilization of well not in compliance with this part.

Rule 805. (1) This part is not retroactive for individual well installations constructed before January 12, 1978 unless 1 or more of the following conditions exists: (a) Water quality from the well does not meet the state drinking water standards. (b) The department determines that continued use of a well represents a health hazard. (c) A well violates rules that were in effect at the time of construction. (2) Significant changes or major repairs made to a well that existed before January 12, 1978 shall conform to this part. Significant changes include replacing the casing, modifying the depth of a well, installing new pumping equipment of a different type or of higher capacity, or modifying the pump setting. In general, a significant change or major repair shall be considered to have occurred if the pumping capacity is increased above the original capacity as a result of the work. A significant change or major repair shall not include routine maintenance or incidental repairs. (3) A public water supply proposing to utilize water from a well or well field not in compliance with this part may be required to provide continuous treatment of the water in a manner acceptable to the department and shall obtain written approval from the department before utilizing that well or well field as part of a public water supply. (4) A public water supply employing a complete treatment system to treat a groundwater source may be granted special consideration by the department for the location and construction of wells used as a raw water source before treatment.