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Table 3 Endosulfan levels detected in Hex River Valley

From: Contamination of rural surface and ground water by endosulfan in farming areas of the Western Cape, South Africa

Date

Sites and Concentration in μg/L

 

E

F

G

Cdr

Bdr

Ar

Br

Dd

H

J

K

L

M

11/2/98

nd

0.24

nd

nd

0.19

0.44

0.16

nd

ns

ns

ns

ns

ns

18/2/98

nd

0.32

nd

nd

0.37

0.11

nd

nd

ns

ns

ns

ns

ns

25/2/98

nd

0.24

nd

nd

0.18

(0.08)

nd

nd

ns

ns

ns

ns

ns

4/3/98

nd

0.29

nd

nd

2.22

0.28

0.204

nd

ns

ns

ns

ns

ns

11/3/98

nd

0.16

nd

(0.07)

1.53

0.16

nd

nd

ns

ns

ns

ns

ns

18/3/98

nd

0.22

nd

nd

1.81

0.14

nd

nd

ns

ns

ns

ns

ns

25/3/98

nd

0.20

nd

nd

1.10

(0.08)

nd

nd

ns

ns

ns

ns

ns

22/4/98

nd

0.26

nd

nd

0.43

nd

nd

nd

nd

ns

ns

ns

ns

12/5/98

nd

nd

nd

nd

(0.04)

nd

nd

nd

nd

ns

ns

ns

ns

19/5/98

nd

(0.06)

(0.03)

nd

0.23

0.06

ns

nd

nd

ns

ns

ns

ns

12/8/98

(0.03)

(0.04)

nd

nd

(0.03)

(0.02)

0.20

nd

nd

ns

ns

ns

ns

23/9/98

(0.03)

1.56

nd

ns

(0.01)

(0.02)

ns

0.2

nd

(0.03)

nd

nd

ns

21/10/98

nd

(0.04)

0.264

ns

nd

0.19

(0.09)

(0.05)

0.23

nd

nd

ns

ns

12/11/98

nd

nd

nd

ns

0.13

nd

nd

nd

nd

nd

ns

nd

ns

18/11/98

nd

nd

nd

ns

0.58

nd

(0.06)

0.58

nd

nd

0.4

nd

ns

13/1/99

nd

nd

nd

ns

ns

nd

nd

0.25

0.89

ns

ns

ns

ns

24/2/99

nd

1.02

0.45

ns

1.84

nd

0.51

0.47

nd

0.15

ns

0.37

ns

17/3/99

ns

1.25

0.19

ns

3.86

1.02

nd

0.35

nd

0.62

ns

ns

ns

07/4/99

ns

0.54

nd

ns

0.79

nd

nd

(0.09)

nd

nd

ns

ns

ns

20/4/99

0.35

0.29

(0.05)

ns

1.48

ns

0.79

(0.08)

nd

ns

ns

ns

ns

26/4/99

0.47

0.27

nd

ns

0.59

nd

ns

0.2

ns

ns

ns

ns

ns

13/5/99

(0.02)

(0.03)

ns

ns

(0.03)

nd

ns

nd

ns

0.43

ns

ns

nd

Mean (SD)

0.05 (0.13)

0.32 (0.42)

0.05 (0.12)

0.006 (0.021)

0.830 (0.988)

0.124 (0.235)

0.112 (0.214)

0.103 (0.17)

0.086 (0.250)

0.154 (0.24)

0.133 (0.23)

0.0925 (0.185)

0 (0)

N

20

22

21

11

21

21

18

22

13

8

3

4

1

% positive samples*

25

82

24

9

95

57

39

41

15

50

33

25

0

  1. ns = Not sampled; nd = not detected (no discernable peak, less than 0.01 μg/L () = less than quantification limit; * positive samples = samples in which endosulfan was detected (including those below the quantification limit)