(1) The owner or operator of a one-time landfarm facility shall meet the following siting requirements. Treatment cells must be located:

(a) more than 1,000 feet from domestic water wells;

(b) more than 500 feet from any residential property boundary; and

(c) at least 150 feet from the high water mark of surface water, including an intermittent drainage and floodplain; and

(d) with at least 25 feet of vertical separation between the base of the treatment zone and the seasonally high water level of the uppermost aquifer beneath the facility.

(2) A one-time landfarm facility may not be constructed at a site where the depth to the uppermost aquifer's seasonally high water level is less than or equal to 25 feet without prior written approval by the department.


History: 75-10-204, MCA; IMP, 75-10-204, MCA; NEW, 2017 MAR p. 666, Eff. 3/11/17.