Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico)

Table 1

Sampling stations and physicochemical parameters of the groundwater. Note: W1 and W2 were collected in 2005 (rainy season) and the rest of the samples in 2007 (dry season).

Well site	pH	TDS (ppm)	T (°C)	Depth (m)	North	West	Elevation (m)
1	6.8	80	20	15	28° 49′ 9.8′′	106° 19′ 5′′	1623
2	6.8	120	20	10	28° 49′ 38.6′′	106° 17′ 53′′	1603
3	7.1	190	20	240	28° 49^' 52.4′′	106° 17^' 17′′	1596
4	7.4	160	20	160	28° 51^' 7.1′′	106° 14^' 36′′	1576
5	7.4	180	22	45	28° 51^' 30′′	106° 12^' 20′′	1556
6	7.6	240	22	s.w.*	28° 52^' 21′′	106° 12^' 39′′	1563
7	7.7	180	22	s.w.	28° 51^' 29′′	106° 10^' 59′′	1539
8	7.4	190	20	100	28° 52^' 18′′	106° 10^' 35′′	1530
9	7.7	210	22	100	28° 51^' 40′′	106° 10^' 18′′	1533
10	7.9	250	20	120	28° 50^' 67′′	106° 11^' 48′′	1537
11	7.4	210	20	90	28° 56^' 93′′	106° 15^' 65′′	1592
12	7.5	310	20	150	28° 56^' 74′′	106° 16^' 62′′	1607
13	7.5	290	22	180	28° 56^' 93′′	106° 18^' 41′′	1630
14	7.6	170	22	200	28° 54^' 83′′	106° 16^' 61′′	1610
15	7.6	180	22	s.w.	28° 54^' 83′′	106° 16^' 14′′	1607
16	7.4	170	22	150	28° 54^' 83′′	106° 17^' 6′′	1630
17	6.8	150	20	s.w.	28° 51^' 51′′	106° 19^' 72′′	1641

* s.w: shallow wells.