glchpt7
7.1 LOCATION AND SITE PROTECTION 2
7.2 PUMPING STATIONS 2
7.2.1 General 2
7.2.2 Wet Wells or Suction Wells 3
7.2.3 Equipment Servicing 3
7.2.4 Stairways and Ladders 3
7.2.5 Heating 4
7.2.6 Ventilation 4
7.2.7 Dehumidification 4
7.2.8 Lighting 4
7.2.9 Contingency Planning 4
7.2.10 Sanitary and Other Conveniences 5
7.2.11 Floor Drains 5
7.3 PUMPS 6
7.3.1 General 6
7.3.2 Suction Lift 6
7.3.3 Priming 7
7.4 BOOSTER PUMPS 7
7.4.1 Location, Metering, Number, and Controls 7
7.4.2 In-Line Booster Pumps 7
7.4.3 Individual Home Booster Pumps 8
7.5 AUTOMATIC AND REMOTE CONTROLLED STATIONS 8
7.6.1 Valves 8
7.6.2 Piping 8
7.6.3 Gauges and Meters 9
7.6.4 Water Seals 9
7.6.5 Controls 9
7.7 STANDBY POWER 9
Acronyms used in this chapter:
ANSI – American National Standards Institute
AWWA - Ameri can Water Works Association
CMR – Code of MA Regulations
MassDEP – MA Dept. of Environmental Protection
MCL - maximum contaminant level
MSDS - material safety data sheets
NFPA - National Fire Protection Association
NSF – National Sanitation Foundation
PWS – public water system
UIC – underground injection control
Chapter 7 Chapter 7
Pumping Facilities
7.0 General
Pumping facilities shall be designed to maintain the sanitary quality of pumped water. Subsurface pump rooms and inaccessible installations should be avoided. No pumping station shall
be subject to flooding. Whenever possible, energy star qualified pumps, controls, and appurtenances should be considered for energy conservation.
7.1 Location and Site Protection
The proposed site must meet the requirements for sanitary protection of water quality, hydraulics of the system, and protection against interruption of service by fire, flood, or any
other hazard. The station shall be:
Elevated to a minimum of two feet above the 100-year flood elevation or highest recorded flood elevation, whichever is higher, or protected to such elevations, unless otherwise approved
by MassDEP in writing. MassDEP recommends the station be elevated a minimum of three feet above these elevations to address potential climate change conditions;
Readily accessible at all times unless permitted to be out of service for the period of inaccessibility;
Graded around the station so as to lead surface drainage away from the station;
Protected to prevent vandalism, sabotage and entrance by unauthorized persons or animals. The pump station should be located within a secure area, such as, a locked building or inside
a chain linked fenced area. Any windows shall be vandal proof.
7.2 Pumping Stations
7.2.1 General
Both raw and finished water pumping stations shall:
1. Have adequate space for the installation of additional units if needed, and for the safe servicing of all equipment;
2. Be of durable construction, fire and weather resistant, and with outward-opening doors;
3. Have floor elevation at least 6 inches above finished grade;
4. Have underground structures waterproofed;
5. Provide a suitable outlet for drainage from pump glands without discharging onto the floor;
Have all floors drained in such a manner that the quality of the potable water will not be endangered. All floors shall slope to a suitable drain or sump (see section 7.2.11 – Floor
Drains).
Provisions must be made to insure security of the pump station at all times. Incorporation of appropriate intrusion and equipment failure alarms must be provided (see Chapter 6.1.4 -
Water Treatment Facility Design for Non-Critical Chemical Feed Systems and Chapter 6.1.3 – Chemical Safety Control Strategy for Critical Chemical Feed Systems).
7.2.2 Wet Wells or Suction Wells
Wet wells or suction wells shall:
Be watertight;
Have floors sloped to permit removal of water and entrained solids;
3. Be covered or otherwise protected against contamination;
4. Have two pumping compartments or other means to allow the wet well or suction well to be taken out of service for inspection, maintenance, or repair, unless otherwise approved by
MassDEP in writing.
7.2.3 Equipment Servicing
Pump stations shall be provided with:
1. Crane-ways, hoist beams, eyebolts, or other adequate facilities for servicing or removal of pumps, motors, or other heavy equipment;
2. Openings in floors, roofs, or wherever else needed for removal of heavy or bulky equipment;
3. A convenient tool board, or other facilities as needed, for proper maintenance of the equipment;
Labels such that the pumps and valves in the station are tagged to correspond to the maintenance record and for proper identification.
7.2.4 Stairways and Ladders
Stairways or ladders shall:
1. Be provided between all floors and in entry pits or compartments;
2. Have handrails on both sides and treads of non-slip material. Stairs are preferred in areas where there is frequent traffic or where supplies are transported by hand. Stairs shall
have risers not exceeding seven inches, and treads wide enough for safety.
7.2.5 Heating
Provisions shall be made for adequate heating for:
1. The comfort of the operator;
2. The safe and efficient operation of the equipment. In pump houses not occupied by personnel, sufficient heat must be provided to prevent freezing of equipment or the treatment process.
7.2.6 Ventilation
Ventilation shall conform to existing local, state, and federal codes. Adequate ventilation shall be provided for all pumping stations. Forced ventilation of at least six changes of
air per hour with adequate air intake louvers shall be provided for:
1. All confined rooms, compartments, pits, and other enclosures below ground floor where equipment and materials may be damaged by no ventilation;
2. Any area where an unsafe atmosphere may develop or where excessive heat may build up;
7.2.7 Dehumidification
A means for dehumidification should be provided in areas where excess moisture could cause hazards to safety or damage to equipment and materials.
7.2.8 Lighting
The pump station shall be adequately lighted throughout to deter vandalism and facilitate maintenance. All electrical work shall conform to the requirements of the National Electrical
Code or to relevant MA state electrical code (237CMR 1.00 – 23.00) and/or local codes as required.
7.2.9 Contingency Planning
A contingency planning sheet (from the system’s Emergency Response Plan (required by 310 CMR 22.04 (13)) must be posted in a readily visible part of the pump house. The plan must display
directions, contacts, and phone numbers of the proper persons to contact in case of emergency. At a minimum, the following phone numbers must be posted, and be updated as changes occur:
1. Police and fire chief
2. Water superintendent
3. Water commissioners
4. MassDEP’s regional office Drinking Water Program point of contact
5. Ambulance service
6. Closest hospital
7. Consulting engineer or geologist
8. Pump and motor manufacturers
7.2.10 Sanitary and Other Conveniences
Except in the cases of small automatic stations or where such facilities are otherwise available, all pumping stations that are manned for extended periods should be provided with potable
water, lavatory, and toilet facilities, or as required in MA state plumbing code (248 CMR 10.10 Plumbing Fixtures). Plumbing must be so installed as to prevent contamination of a public
water supply. Wastes shall be discharged in accordance with Chapter 5.10.2 Facility Waste.
7.2.11 Floor Drains
To minimize the threat of a release of hazardous materials or pollutants via floor drains in water supply pump houses, the following criteria will apply:
1. Best Management Practices
Berm the immediate area surrounding any pumps or engines that require periodic oil changes.
Keep the pump house floor clean.
Spills from potential contaminants should be managed and disposed of using dry cleanup methods in accordance with MassDEP regulations.
2. Requirements
Only hazardous materials necessary for the treatment and maintenance of the drinking water supply may be stored in the pump house. Use or storage of any equipment, such as, pump seals,
switches, thermostats, flow meters, pressure gauges, or thermometers containing mercury should be avoided to prevent contamination;
Hazardous materials must be stored in a bermed area capable of containing 110 percent of the volume of stored chemicals;
Floor drains located in hazardous material storage areas must connect to the municipal sewer line or to a holding tank;
Existing oil and sand interceptors connected to a floor drain must be strictly maintained and cleaned;
Floor drains must be temporarily but securely covered/isolated during any work (e.g., oil changes) that uses potential contaminants;
A pump house operating with a sump pump and/or an emergency water-cooling system may plumb these systems independently to a drywell or surface stone outfall located outside the Zone
I. If the public water system (PWS) does not own land outside the Zone I, discharge may occur within the Zone I at least 100 ft. from the wellhead;