(a) Storage tanks.

1. (1) All storage tanks must be completely covered and so constructed as to prevent the possibility of contamination of the water.
2. (2) They must be constructed of durable material and maintained in good repair.
3. (3) They shall be of adequate capacity to serve the purpose intended.

(b) Distribution.

1. (1) Pipe size. The pipe must be large enough to deliver the required quantity of water at each service connection without excessive pressure reduction.

2. (2) Pressure. Adequate pressure must be maintained at all points in the piping system to:

   1. (A) Serve adequately all fixtures; and
   2. (B) Prevent the reversal of flow in the pipe.

3. (3) Proximity to sewers.

   1. (A) Water and sewers shall be:

(i) Constructed as far apart as practicable; and

1. (ii) Separated by undisturbed and compacted earth.

   1. (B) A minimum horizontal distance of ten feet (10’) should be maintained between water lines and sewer lines and other sources of contamination.
   2. (C) Water lines and sewer lines shall not be laid in the same trench except on written approval of the Department of Health.
   3. (D) In cases where it is not practical to maintain a ten-foot separation, the reviewing authority may allow deviation on a case-by-case basis, if supported by scientific data.
2. (4) Prohibited services. Domestic water shall not be supplied to any device or equipment which may permit the contamination of the water supply by back-siphonage or back-flow.
3. (5) Cross connections. Any physical connection is prohibited whereby a potable water supply, whether public or private ownership, is connected to an unsafe water supply system, either inside or outside of any building or buildings.

4. (6) Sewage disposal. No semi-public water system shall provide service to a new building or residence in an unsewered area until the customer provides written documentation that:

   1. (A) The department has approved plans for construction of a sewage disposal facility for the building or residence; or
   2. (B) No disposal system approval is required by the department for the building.

5. (7) Plumbing inspection.

   1. (A) No semi-public water system shall provide new service to any building or residence until the customer provides written documentation that the service line was inspected by a certified plumbing inspector and found to be in substantial compliance with the Arkansas Plumbing Code (Rules Governing Construction, Installation, and Inspection of Plumbing and Drainage), 17 CAR pt. 65.
   2. (B) If the system has no certified plumbing inspector, the written documentation shall be obtained from the department’s Area Plumbing Inspector or a certified inspector designated by the Area Inspector.
   3. (C) Temporary service for construction purposes in unsewered areas may be provided only after compliance with subdivision (b)(6) of this section, above.