09-02
3.5.1.2.2 Ambulatory Care Center and/or Ambulatory Care Area of the Hospital. Provide a well(s) to
supply a daily potable water emergency demand of 4L/m2 (0.1 gallons per gross square foot) of floor
area for 4 days.
3.5.1.3 Major Flood Areas. Where available, provide a valved-off standby emergency water service
connection from an independent water system operated by another public agency, a university, or a
private water company. If possible, the emergency water connection shall be capable of delivering the
design water service requirements. Provide a well(s) to comply with requirements indicated for
hurricanes in paragraph 3.5.1.2.
3.5.2 Building Service Lines. Serve bed buildings, research building, and ambulatory care buildings in
earthquake area with two independent water lines; each providing full demand. Provide other buildings
with one water supply.
3.5.3 Water Storage Tank(s). Provide a water storage tank(s) for earthquake, hurricane, and major
flood emergency use. Locate the emergency water storage tank(s) either within or close to the hospital,
research, or ambulatory care building. If research building is located near hospital building, separate
water storage tanks are not necessary. To prevent stagnation, design the water to flow continuously
through the emergency water storage during normal operating periods. Equip the storage tank(s) with a
water level gauge calibrated in liters (gallons) and a water meter to record the usage in liters (gallons).
Locate shut-off valves on inlet lines to the emergency water storage tank(s) for isolation from
contaminated sources of supply. Design pumps of sufficient capacity to operate the plumbing systems
within the building at emergency usage rates in conjunction with the storage facility. An existing water
storage tank may serve as the emergency water storage provided it meets the requirements of this
construction standard.
3.5.3.1 Medical Center. Base storage capacity on 380 L/day/bed (100 gallons per day per bed) for 4
days.
3.5.3.2 Ambulatory Care Center and/or Ambulatory Care Area of the Hospital or Research Building.
Base storage capacity on 4 L/day/m2 (0.1 gallons per day per gross square foot) of floor area for 4
days.
3.5.4 Potable Water Treatment. Water testing equipment shall be provided to test for chlorine residual
during disaster emergencies. Standby chlorinating equipment shall be provided at storage tank
discharge for emergency use to maintain a chlorine residual of 0.5 mg/L. Provide addition water
treatment as necessary to meet drinking water requirements of the Environmental Protection Agency.
3.6 Sanitary Sewer Service
3.6.1 Earthquake Areas. Provide at least one emergency sanitary sewage holding tank adjacent to
hospital, research, and ambulatory care building for temporary retention of sanitary sewage discharged
following an earthquake. Size the capacity of the holding tank(s) for a hospital on 190 L (50 gallons)
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