Page 327 - 1915, Springs of CA.

SALINE SPBINGS. S07

Analysis of San Benito Mineral Water, San Benito County, Cal.
[Analyst, M. E. Jaffa. Authority, 13th Cal. Constituents are in parts per million.]

Properties of reaction:
85
0
0
Primary alkalinity. ............................................................. 7
8
Tertiary alkalinity.............................................................. (1 )
Constituents. By Reacting
weight. values.
Sodium (Na).. ...................................................................... | 780 33.94
Potassium ( K). .....................................................................
Calcium (Ca). ....................................................................... 29 1.46
18 1.50
Iron (Fe). ........................................................................... 8.9 .32
736 15.32
Chloride (Cl).... .................................................................... 566 15.97
178 5.93
188
2,503.9
The well was put down in the early nineties. Water was first struck
at a depth of 100 feet, and drilling was stopped at 167 feet in blue clay,
but a sufficient supply of water was not obtained and the well was
deepened a year later. The mineralized water was struck at a depth
of 286 feet, where drilling was discontinued. The water stands about
100 feet below the surface and is pumped by a windmill for domestic
use. Its strongly sulphated character renders it laxative and pre-
vents its free use for drinking at first, but those who use it daily
gradually become accustomed to it and it ceases to have notably
medicinal effect.
Clays and coarser sediments of Tertiary age form low rolling hills
that border San Benito Valley in this locality. The mineral con-
stituents of the water are evidently derived from these marine
sediments.
TAMALPAIS MINERAL WELL (MARIN 2).
Tamalpais Mineral Well is situated in the town of San Raf ael, in
Marin County.. A mildly saline water that is obtained from it has
been carbonated and bottled for a number of years as Tamalpais Nat-
ural Mineral Water and is also used with sirups in the preparation of
carbonated beverages. The well' is in the southern part of the town,
at the base of a tuff aceous hill, and has been sometimes referred to as
San Rafael Spring. The water rises in a stone-curbed well 6 feet in
diameter and 25 feet deep in the basement of the building of the
Buffalo Soda Works.