upon the end use of the water. Degree of hardness
can be controlled by blending softened water and raw
water. Normally, softening to a requirement for no
more than 0.189 liters per second (3 gpm) at 51 ppm
hardness will be acceptable. Usually, the water
system supplying a hospital will have both a
hydrogen sulfide ppm and a turbidity content of less
than 5 ppm. However, if the water analysis
indicated that either or both exceed 5 ppm, suitable
water treatment will be specified in addition to a
water softener system.
**************************************************************************
Water softening water treatment system shall be provided for the indicated
continuous water flow capacity and for the indicated grains hardness to
which water shall be softened.
2.24.1
Water Analysis
The water analysis of the water to be softened is as follows:
----------------------------------------------------------------------
Constituent
ppm
Constituent
ppm
----------------------------------------------------------------------
Total solids . . . . . [_____]
Nitrates as NO(3). . . . . [_____]
Calcium as Ca
. . . . [_____]
Alkalinity as CaCO(3):
(Methyl Orange)
Magnesium as Mg
. . . [_____]
(Phenolphtalein) . . . [_____]
Sodium and potassium
Total hardness
as Na . . . . . . . . [_____]
as CaCO(3) . . . . . . . . [_____]
Iron as Fe . . . . . . [_____]
Carbonate hardness
as CaCO(3) . . . . . . . . [_____]
Silica as SiO(2) . . . [_____]
Noncarbonate hardness
Sulphate as SO(4). . . [_____]
as CaCO(3) . . . . . . . . [_____]
Chlorides as Cl
. . . [_____]
Free carbon dioxide
as CO(2) . . . . . . . . . [_____]
Hydrogen Sulfide
as H(2)S . . . . . . . [_____]
-----------------------------
Miscellaneous
Values
-----------------------------
Turbidity . . . . . .
[_____]ppm
Color . . . . . . . .
[_____]
pH
.........
[_____]
2.24.2
System Requirements
The water softener assembly shall consist of two softener units, with each
unit designed for the full-flow capacity indicated, and a brine-solution
SECTION 15405A
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