SECTION 252:626-15-2. Pumping station building

(a)   General construction of building.

(1)   Locate pump station buildings on a concrete floor at least 6 inches above the surrounding surface and graded to prevent the entrance of water.

(2)   Slope the floor at least 2.5% to a suitable drain.

(3)   Construction materials shall be fire and weather resistant.

(4)   Provide openings in the floors, roofs or other locations as needed for removal of large, heavy and/or bulky equipment.

(5)   Doors must open outward.

(6)   Size the building to house all pumping equipment and accessories including future units for expected growth with ample space around all moving mechanical parts and electrical equipment to ensure safety of personnel and permit ready removal or servicing of equipment.

(7)   Construct all portions of the structure below the ground surface of waterproofed concrete or other impervious material.

(8)   Design all floors, dry wells, meter pits, or other compartments not intended to contain water to be self-draining to a point where all drippage, condensation, cleanup water or spillage will flow away by gravity without possibility of backflow under maximum ground water levels or other adverse conditions or provide a suitable sump and sump pump to remove water without impairing the quality of the water handled by the station.

(9)   All construction must be in accordance with state and local safety, building, electrical, plumbing, and sanitary codes.

(b)   Equipment servicing.

(1)   Arrange piping for ease of service and removal of pumps, valves or other parts requiring service and for removal with minimum disturbance to the system.

(2)   Provide crane ways and hoists or other equipment to facilitate handling of heavy or bulky equipment when making repairs.

(c)   Wet wells or suction wells. All wet wells and other water-containing compartments must:

(1)   be constructed of waterproofed masonry or other impervious material,

(2)   have floors with sufficient slope to permit the complete removal of the water and any entrained solids, and

(3)   be covered or otherwise protected to prevent impairment of the quality of the water contained therein.

(d)   Stairways and ladders. Provide stairways or ladders between all floors and in pits or compartments. Provide handrails on both sides and non-slip treads. The maximum height of risers is 9 inches with treads wide enough for safety.

(e)   Heating. Provide sufficient heating for safe, efficient operation and to prevent freezing of equipment.

(f)   Ventilation. Provide adequate ventilation for all pumping stations. Provide forced ventilation of at least 6 air changes per hour for:

(1)   all rooms, compartments, pits and other enclosures below ground floor, and

(2)   any area where unsafe atmosphere may develop or where excessive heat may build up.

(g)   Dehumidification. Provide dehumidification in areas where excess moisture could cause safety hazards or equipment damage.

(h)   Lighting. Adequately light pump stations and design all electrical work to conform to the requirements of relevant state or local codes.

(i)   Sanitary and other conveniences. Install plumbing in stations with lavatory and toilet facilities to prevent contamination of the PWS. Discharge sanitary wastes to an approved sanitary sewer system or an approved on-site waste treatment facility.

[Source: Added at 18 Ok Reg 1612, eff 6-1-01; Amended at 25 Ok Reg 2304, eff 7-11-08]