The interior arrangement shall be such as to isolate chlorination, generator (if there is one), and restroom facilities from the main operating area or pump room for reasons of noise control, safety, and privacy. Separate exterior doorways shall provide access to each isolated area, except the restroom.

Location and spacing of pumps, piping, and valves shall be such as to provide ease of maintenance and ease of removal and replacement without disturbing other pieces of equipment. Adequate space shall be provided for installation of future pumps to meet projected growth demand. Design shall also allow for limited upgrading of the station without major structural or electrical changes.

Pump elevation shall be such that the pumps would operate under a positive suction head.

The motor control center shall be located at a higher elevation than the pump room floor to provide easy accessibility and convenience and to prevent damage by flooding.

There shall be enough stairs to provide access to each pump without having to climb over pipes. The stairs shall conform to MOSH safety standards, and shall be of aluminum.

Suction and discharge headers shall be located outside the pumping station.

The main pump room shall be equipped with a bridge type crane for servicing all equipment. The crane and hoist shall have a capacity to handle the biggest piece of equipment at the station. Consideration shall be given to future possible upgrading of pumps and motors in selecting this capacity.

Space for driving trucks inside the station shall be provided and the bridge crane shall be capable of traversing this area.

For facilities to handle chlorine containers, refer to the Mechanical and Electrical Design Guidelines for Chlorination Facilities.

A preferred pumping station plan showing physical arrangement is shown in Drawing DG-02-1. (28-ME-DG-02 § 4)