(1) The department hereby adopts and incorporates by reference ARM Title 17, chapter 36, subchapter 9, on site subsurface wastewater treatment systems. A copy of ARM Title 17, chapter 36, subchapter 9 may be obtained from the Department of Environmental Quality, Permitting and Compliance Division, 1520 East 6th Avenue, P.O. Box 200901, Helena, MT 59620-0901.
(2) In order to ensure sewage is safely and completely disposed of, a retirement home must:
(a) connect to a public water supply system approved by the department of environmental quality; or
(b) if the retirement home is not utilized by more than 25 persons daily at least 60 days out of the calendar year, including guests, staff, and residents, and an adequate public sewage system is not available, utilize a nonpublic system whose construction and use meet the construction and operation standards in ARM Title 17, chapter 36, subchapter 9;
(c) replace or repair a failed system as defined by ARM 17.36.903(6) .