COMPOSITION OP THE OlL-PIELD WATERS. 57 
Table 1 . —Analyses of surface water from the Coalinga, Midway , and Sunset oil fields, 
Cal. 
PROPERTIES OF REACTION IN PER CENT. 
Primary salinity. 
Secondary salinity. 
Primary alkalinity. 
Secondary alkalinity. 
Per cent of rS0 4 in rS0 4 +rCl. 
CONSTITUENTS IN PARTS PER MILLION. 
Sodium (Na). 
Potassium (K). 
Calcium (Ca). 
Magnesium (Mg). 
Iron oxide (Fe 203 > and alumina (AI 2 O 3 ) 
Sulphate (S0 4 ). 
Nitrate (N0 3 ). 
Chloride (Cl). 
Carbonate (C0 3 ). 
Bicarbonate (HC0 3 ). 
Silica (SiO?). 
REACTING VALUES IN PER CENT. 
Alkalies: 
Sodium (rNa). 
Potassium (rK). 
Alkaline earths: 
Calcium (rCa). 
Magnesium (rMg). 
Strong acids: 
Sulphate (rS0 4 ). 
Nitrate (rN0 3 ). 
Chloride (rCl). 
Weak acids: 
Carbonate (rC0 3 ). 
Bicarbonate (rHC0 3 ). 
ANALYSIS AS REPORTED, c 
Sodium sulphate. 
Sodium chloride. 
Calcium sulphate. 
Calcium carbonate. 
Magnesium sulphate. 
Magnesium carbonate. 
Iron oxide and alumina. 
Silica.v. 
1 
2 
3 
4 
5 
6 
7 
40.8 
50.0 
44.4 
14.4 
45.4 
19.6 
28.4 
16.0 
38.4 
22 
70.4 
48 
18.8 
43.6 
0 
0 
0 
0 
0 
0 
0 
43.2 
11.6 
33.6 
15.2 
6.6 
61.6 
28.0 
81.4 
95.7 
86.1 
94.9 
93.4 
66.1 
90.5 
ol85 
a 668 
} 216 
117 
1,409 
23 
| a 112 
40 
248 
92 
444 
630 
56 
138 
117 
203 
87 
107 
511 
16 
66 
4.5 
1.9 
436 
2,361 
580 
1,393 
5,638 
47 
538 
Trace. 
5 
Trace. 
30 
75 
78 
70 
53 
300 
18 
42 
b 255 
5 203 
0 
0 
30 
7.2 
5 144 
433 
335 
475 
178 
4.4 
13 
'87 
50 
38 
29 
12 
1,116.9 
3,774 
1,345 
2,334 
8,790 
314.2 
1,053.9 
a 20.4 
a 25.0 
} 22.2 
7.2 
22.7 
9.8 
( ol4.2 
5.1 
10.6 
10.9 
30.7 
11.7 
27.4 
20.1 
24.5 
14.4 
16.9 
12.1 
15.6 
12.8 
15.7 
23.1 
42.3 
28.6 
40.2 
43.6 
9.6 
32.6 
.1 
4.7 
5.3 
1.9 
4.6 
2.1 
3.1 
4.9 
3.4 
521.6 
55.8 
.0 
.0 
.4 
2.3 
5 14.0 
16.8 
7.6 
2.9 
28.5 
24.53 
111.30 
15.30 
7.21 
7.51 
4.06 
27.28 
8.36 
5.85 
16.10 
14.04 
11.17 
54.49 
19.04 
15.99 
3.06 
.26 
.11 
.26 
.76 
.69 
65.27 
220.50 
61.60 
/ 
a Reported and calculated as sodium but includes potassium. 
b Reported and calculated as carbonate but probably in part bicarbonate, 
c In hypothetic combinations, in grains per U. S. gallon. 
^^Los Gatos Creek> T 2 o S., R. 14 E. Analyst, Kern Trading & Oil Co. 
2. Diaz Creek, T. 19 S., R. 14 E., sampled above junction with Los Gatos Creek. Analyst, Kern 
Trading & Oil Co. 
Midway^field^ g . sec 2 T 30 g > R 2 1 E. Spring is in Santa Margarita (?) formation, but source of 
water may be affected by near-by fault. Sampled by G. S. Rogers, September, 1915. 
S C Dinsmore ** 
4. Crocker Spring, sec. 18, T. 31 S., R. 22 E. Spring is in shale of Monterey group. 
Rogers, September, 1915. Analyst, S. C. Dinsmore. 
Sunset^fleld^water Creek> seC- 29; T u n., R. 24 W. Sampled by G. S. Rogers, September, 1915. Analyst, 
6 Kern County 1 2 * 4 * * 7 Land Co. Spring in west corner of San Emigdio land grant. Sampled from pipe line 
of Western Minerals Co. by G. S. Rogers, September, 1915. Analyst S. c. Dinsmore. 
7. San Emigdio Creek, San Emigdio land grant. Analyst, Standard Oil Co., June, 1910. 
Analyst, 
Sampled by G. S. 
