Table 8 shows analyses of the Estanzuela and San Geronimo waters, made
in February, 1910, by Messrs. Ledoux, of New York City. The Estanzuela
sample was taken at the valve-house of the South Reservoir, while that
of San Geronimo was taken in Shaft No. 1 of the infiltration gallery
when flowing at the rate of about 450 liters per sec. Both waters are
absolutely free from turbidity.
TABLE 8.--ANALYSES OF ESTANZUELA AND SAN GERONIMO WATERS.
In Parts per Million.
==================================+================+===============
| | San Geronimo
| Estanzuela. | Infiltration
| | Gallery.
----------------------------------+----------------+---------------
Total solid matter in solution | 209.00 | 305.00
Organic and volatile matter | Not weighable. | Not weighable.
| |
ANALYSIS OF SOLIDS: | |
Silica | 10.5 | 12.0
Iron and Alumina | Traces. | Traces.
Lime | 85.4 | 112.6
Magnesia | 3.8 | 22.6
Soda (Na_{2}O) | 13.3 | 20.2
Potash (K_{2}O) | 2.0 | 1.9
Sulphuric Acid | 24.4 | 11.5
Chlorine | 2.0 | 2.8
+----------------+---------------
PROBABLE COMBINATION OF BASES & | |
ACID RADICALS IN THE SOLIDS: | |
Silica | 10.5 | 12.0
Iron and Alumina | Traces. | Traces.
Sodium Chloride | 3.3 | 4.6
Potassium Sulphate | 3.7 | 3.5
Sodium Sulphate | 26.3 | 40.8
Calcium Sulphate | 13.3 | 22.1
Calcium Carbonate | 142.7 | 184.8
Magnesium Carbonate | 8.4 | 49.8
+----------------+---------------
| 208.2 | 317.6
| |
Nitrogen as Free Ammonia | 0.004 | 0.032
Nitrogen as Albuminoid Ammonia | 0.006 | 0.022
Nitrogen as Nitrites (N_{2}O_{3}) | 0.002 | 0.002
Nitrogen as Nitrates (N_{2}O_{3}) | 0.100 | 1.85
Total Hardness (as CaCO_{3}) | 155.0 | 220.0
Alkalinity (as CaCO_{3}) | 121.0 | 180.0
==================================+================+===============