(1) The allowable new sewage treatment systems, together with certain other requirements for such systems, are indicated in Table 2 of ARM 17.36.320. All systems must be designed and installed in accordance with department Circular DEQ-4. The use of sewage systems for replacement systems shall be in accordance with department Circular DEQ-4. Requirements applicable to review of existing sewage treatment systems are set out in ARM 17.36.327.

(2) Systems designed in accordance with department Circular DEQ-2, may not be used for individual, shared, or multi-user systems.

(3) The following sewage systems may not be used for new systems:

(a) cut systems;

(b) fill systems;

(c) artificially drained systems;

(d) cesspools;

(e) pit privies;

(f) seepage pits; and

(g) holding tanks.

(i) The department may grant a waiver, pursuant to ARM 17.36.601, to allow holding tanks for recreational vehicle dump stations in facilities owned and operated by a local, state, or federal unit of government, or in facilities licensed by the Department of Public Health and Human Services and inspected by the local health department. Holding tanks must be designed and maintained in accordance with the requirements in department Circular DEQ-4 and all other requirements imposed by the department and local health department.

(4) The following systems may be used only as replacement systems, subject to the limitations provided in department Circular DEQ-4:

(a) cut systems;

(b) fill systems; and

(c) artificially drained systems.

(5) Sealed pit privies may be used only in facilities owned and operated by a local, state, or federal unit of government, or in facilities where use of a sealed pit privy is authorized by the department of public health and human services.