ARM 17.50.1608. DESIGN CRITERIA FOR LANDFARM FACILITIES

(1) An owner or operator may not use a soil treatment cell at a landfarm facility unless it meets the standards provided in ARM 17.50.1613. (2) The owner or operator of a landfarm facility shall ensure that: (a) the basal slope for any treatment cell does not exceed two percent; and (b) storm water run-on and run-off controls are provided for flow volume up to the 24-hour, 25-year storm event. (3) The owner or operator of a minor, intermediate, or major landfarm facility may accept wastes that fail the paint filter liquids test, as described in ARM 17.50.1612, if: (a) the owner or operator has obtained department approval; (b) the liquid wastes are immediately placed in a lined treatment cell designed and constructed pursuant to (1)(b); and (c) the liner has a hydraulic conductivity less than or equal to 1 x 10 -5 cm/sec.