(1) General.
Each public water system, or storage facility serving
connections within a specific area, shall provide:
(a) equalization storage volume, to satisfy
average day demands for water for indoor use and irrigation use,
(b) fire flow storage volume, if the water
system is equipped with fire hydrants intended to provide fire suppression
water or as required by the local fire code official, and
(c) emergency storage, if deemed appropriate
by the water supplier or the Director.
(2) Equalization Storage.
(a) All public drinking water systems shall
provide equalization storage. The amount of equalization storage varies with
the nature of the water system, the extent of irrigation use, and the location
and configuration of the water system.
(b) Table 510-4 lists required equalization
storage for indoor use. Storage requirements for non-community systems not
listed in this table shall be determined by calculating the average day demands
from the information given in Table 510-2.
TABLE 510-4
Storage Volume for Indoor Use
Type Volume Required
(gallons)
Community Systems
Residential;
per single resident service connection 400
Non-Residential;
per Equivalent Residential Connection (ERC) 400
Non-Community Systems
Modern Recreation Camp; per person 30
Semi-Developed Camp; per person
a. with Pit Privies 2.5
b. with Flush Toilets 10
Hotel, Motel and Resort; per unit 75
Labor Camp; per unit 25
Recreational Vehicle Park; per pad 50
Roadway Rest Stop; per vehicle 3.5
Recreational Home Development (i.e.,
developments with limited water use);
per connection (See Note 2 in Table 510-1) 400
(c) Where a
drinking water system provides water for irrigation use, Table 510-5 shall be
used to determine the minimum equalization storage volumes for irrigation. The
procedure for determining the map zone and irrigated acreage for using Table
510-5 is outlined in
R309-510-7(3).
TABLE 510-5
Storage Volume for Irrigation Use
Map Zone Volume Required
(gallons/irrigated acre)
1 1,782
2 1,873
3 2,528
4 2,848
5 4,081
6 4,964
(3)
Fire Flow Storage.
(a) Fire flow storage
shall be provided if fire flow is required by the local fire code official or
if fire hydrants intended for fire flow are installed.
(b) Water systems shall consult with the
local fire code official regarding needed fire flows in the area under
consideration. The fire flow information shall be provided to the Division
during the plan review process.
(c) When direction from the local fire code
official is not available, the water system shall use Appendix B of the
International Fire Code, 2015 edition, for guidance. Unless otherwise approved
by the local fire code official, the fire flow and fire flow duration shall not
be less than 1,000 gallons per minute for 60 minutes.
(4) Emergency Storage.
Emergency storage shall be considered during the design
process. The amount of emergency storage shall be based upon an assessment of
risk and the desired degree of system dependability. The Director may require
emergency storage when it is warranted to protect public health and
welfare.
Notes
Utah Admin. Code R309-510-8
Amended by
Utah
State Bulletin Number 2015-15, effective
7/15/2015
