(1) In order to ensure waste water is completely and safely disposed of, a school must:
(a) connect to a public waste water system meeting the requirements of ARM Title 17, chapter 38, subchapter 1; or
(b) if the school is not utilized by more than 25 persons daily at least 60 days out of the calendar year, including staff and students, and an adequate public waste water system satisfying the requirements of ARM Title 17, chapter 38, subchapter 1 is not available, utilize a non-public system whose construction and use meet the construction and operation standards contained in DEQ Circular 4.
(2) Where pit privies are currently in use, the privies must be operated and maintained in compliance with the standards specified in DEQ Circular 4.
(3) A waste water system design of a type other than described in this rule may be utilized only if it is designed by a professional engineer and offers equivalent sanitary protection as determined by the department, DEQ, or local health authority.