Page 63 - 1915, Springs of CA.

HOT SPRINGS. 59

Analyses of water from Tassajara Hot Springs, Monterey County, Cal.
[Analyst and authority, F. M. Eaton (1009). Constituents are in parts per million.]
1 2 3

Temperature. ............................. 59° C. (138° F.) 39° C. (103° F.) 18° C. (64° F.)
Properties of reaction:
63 65 19
0 0 16
0 0 0
30 26 0
7 9 65
138 104 (?)
By
By
By
Constituents. * weight. Reacting weight. Reacting weight. Reacting
values.
values.
values.
Sodium (Na)..... ......................... 81 3.51 75 3.26
Potassium (K) ............................ 4.6 .12 4.8 .12 I » 0.59
Cnlniiirn (Cft) .... 5.3 .27 4.0 .20 33 1.64
Trace. Trace. 1.3 .11 11 .87
Iron (Fe)..... ............................ / 0.8 .03
} 1.5 .05 2.0 .07 i 1.9 .21
Sulphate (SO4).. . ......................... 110 2.29 109 2.27 36 .75
Chloride (Cl) . ............................. 6.5 .18 5.0 .14 12 .32
41 1.37 38 1.28 61 2.03
oO .00
Silica (SiOj).. .............................. 118 3.90 116 3.84 (?)
367.9 355.1 169.7
Carbon dioxide (COa). . ................... 0 .00 0 .00 Present. Present.
25 1.47 Present. (?)
a Not detected in 1 liter of water.
1, Lower of two main springs; 2, Arsenic Spring; 3, Iron Spring.
The two hot springs were apparently from the same general source,
showing only slight differences in composition. Primary salinity and
primary alkalinity are the chief stable properties, but the waters are
characterized by high tertiary alkalinity of which silica is the chief
component. The carbonate radicle reported is presumably calculated
from the alkalinity determination and doubtless includes sulphides
and possibly silicates. The apparent absence of arsenic in the Arsenic
Spring is noteworthy.
The iron spring is of markedly different character from the hot
springs, being less than half as concentrated and having secondary
alkalinity as the dominant property. Tertiary alkalinity is not
reported but is probably relatively low. The spring is probably of
essentially surface origin and is not directly related to the thermal
waters.
The following notes concerning algous growths in the creek below
the hot springs are here given, as the growths are related to the sul-
phureted character of the water. Although they .are common to
thermal sulphur springs, the relatively large volume of water at
Tassajara Hot Springs, its comparatively slow cooling, and the
presence of both swift currents and of quiet pools in the run-off
stream, afford an unusually good opportunity to observe the varia-
tion in character of the growths.