NAC445A.66985. Pumping facilities: Housing of pumping stations.

A pumping station must, whether it pumps raw water or finished water, comply with the following requirements:

     1. The pumping station must be housed in a building that is weather-resistant and of durable construction. The building must have outward-opening doors with tamper-proof hinges.

     2. The floors must be:

     (a) Elevated at least 6 inches above the finished grade; and

     (b) Drained in such a manner that the quality of finished water is not endangered. All floors must slope at least 1/8 inch per foot to a suitable drain, preferably to daylight.

     3. There must be a suitable outlet for drainage from stuffing boxes and air release valves that has an air gap and does not discharge onto a floor.

     4. There must be adequate space, access hatches and doors for the installation of additional pumping units, if necessary, and for the convenient and safe servicing of all equipment. Embedded lifting eyes, crane ways or hoist rails must be provided above the locations where pumps are installed in a building, and an access or passageway must be provided, to facilitate the removal of the pumps, motors and heavy equipment for servicing or repair.

     5. Any underground structures must be externally waterproofed.

     (Added to NAC by Bd. of Health, eff. 2-20-97)