Water System Design Manual, December 2009
Document source : www.doh.wa.gov
Page 118
December 2009
Water System Design Manual
OPERATIONAL
STORAGOPOPERATION
(OS)
ON
PUMP
OFF
PUMP
OVERFLOW ELEVATION
DEAD STORAGE
EQUALIZING
STORAGE (ES)
Figure 9-1: Reservoir Storage Components
TOTAL
PUMPING
HEAD
DISTRIBUTION SYSTEM
TOTAL
VOLUME
OPERATIONAL
STORAGE (OS)
STAND BY
OR FIRE SUPPRESSION
STORAGE (SB AND FSS)*
HIGHEST
RESIDENCE
SERVED
30 PSIG OR 69 FEET
OF HYDRAULIC
HEAD @ BOTTOM
OF ES
(SECTIONS 8.1.5 &
9.0.3)
20 PSIG OR 46 FEET
OF HYDRAULIC HEAD
@ BOTTOM OF FSS &
SB
SECTIONS 9.3.1 & 9.3.2
)
"EFFECTIVE
VOLUME" - ONLY
THE ES AND SB
PORTIONS APPLY
TO ERU
DETERMINATIONS
* WHICHEVER IS GREATER; SECTION 9.0.5(2) ALLOWS CONSOLIDATION
OF THESE COMPONENTS WITH APPROVAL OF LOCAL FIRE PROTECTION AUTHORITY.
WELL
PUMP
OR BOOSTER PUMP
Summary :
Page 118 December 2009 Water System Design Manual OPERATIONAL STORAGOPOPERATION (OS) ON PUMP OFF PUMP OVERFLOW ELEVATION DEAD STORAGE EQUALIZING STORAGE (ES) Figure 9-1: Reservoir Storage Components TOTAL PUMPING HEAD DISTRIBUTION SYSTEM TOTAL VOLUME OPERATIONAL STORAGE (OS) STAND BY OR FIRE SUPPRESSION STORAGE (SB AND FSS)* HIGHEST RESIDENCE SERVED 30 PSIG OR 69 FEET OF HYDRAULIC HEAD @ BOTTOM OF ES (SECTIONS 8.1.5 &
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storage,pump,head,amp,fss,sections,hydraulic,components,system,total,olume,bottom,operational