2013 Water System Plan, Volume II - Seattle City Clerk's Office - City ...

Chapter 5 Water Infrastructure
Hatches to storage cells and vaults should be located to accommodate
temporary ventilation equipment, including points for the introduction and
exhaust of ventilation air.
To the extent practicable, power outlets should be easily accessible to all
hatches to better enable the operation of temporary ventilation equipment.
Permanent ventilation system should be capable of eight exchanges per hour at
all times.
C. Communication System
Determine the methods of communication to be used by personnel during
facility maintenance (e.g. radio, wire intercom) and provide appropriate
equipment or appurtenances for their use.
At a minimum, provisions for antenna mounts are one mount for every two
communications lines. If there is only one communications line, then one mount
is needed. Locations of the mounts are site specific. Roundup spare conduits for
future installation should be considered.
5.9.10 Water Quality Monitoring/Sampling
At a minimum, water quality should be monitored weekly in open storage reservoirs. For closed
reservoirs, water quality should be monitored every 2 weeks. At chlorine injection locations,
remote monitoring should continuous. The following should be continually monitored:
Chlorine residual
pH
Temperature
Total coliform (TC)
Heterotrophic Plate Count (HPC)
Other parameters may be measured case-by-case, depending on operational circumstances.
5.9.10.1 Sampling Points
At a minimum, design must provide sample points for withdrawal of water for continuous online
measurement of chlorine residual, pH, and temperature at the following locations:
Inlet to each storage cell
Outlet from each storage cell
Provide sample ports from which to obtain manual grab samples for any type of analyses at the
following locations:
Inlet to the storage cell
Outlet from the storage cell
From varying depths of the storage cell, at a minimum from the top (75% level),
middle (50% level), and bottom (20% level) of the cell
SPU Design Standards and Guidelines
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