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Table 5 Endosulfan levels detected in Grabouw

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

DATE

SITES & CONCENTRATION in μg/L

 

G3r

G4r

G7d

G1d

G5d

G2d

G8T

G6b

G9r

23/4/98

(0.01)

nd

(0.09)

(0.06)

(0.08)

1.08

ns

nd

ns

7/5/98

nd

nd

(0.09)

0.32

(0.09)

0.81

(0.09)

ns

ns

27/5/98

(0.06)

0.59

nd

0.24

nd

1.78

nd

ns

ns

29/7/98

nd

nd

nd

nd

nd

0.16

ns

ns

ns

6/9/98

nd

nd

nd

(0.03)

0.70

(0.05)

(0.07)

ns

ns

12/10/98

nd

0.10

0.20

(0.07)

nd

0.10

nd

ns

ns

17/11/98

0.18

0.98

0.90

1.09

1.61

4.41

0.49

ns

ns

2/12/98

0.62

nd

0.82

0.88

0.79

9.11

0.54

ns

ns

18/1/99

0.50

1.09

1.14

0.34

1.2

5.84

0.59

0.26

ns

18/2/99

0.30

1.38

ns

0.96

0.50

ns

0.80

ns

ns

03/3/99

0.47

(0.03)

0.54

0.56

0.63

9.50

1.06

ns

ns

24/3/99

0.91

nd

0.91

nd

0.45

6.44

1.77

nd

ns

15/4/99

0.55

nd

0.15

0.16

0.50

1.85

0.88

ns

0.29

23/4/99

nd

0.27

nd

nd

0.21

ns

0.17

ns

ns

05/5/99

nd

nd

nd

nd

0.10

nd

ns

nd

nd

Mean (SD)

0.24 (0.299)

0.296 (0.476)

0.35 (0.42)

0.31 (0.38)

0.46 (0.48)

3.16 (3.5)

0.538 (0.532)

0.065 (0.13)

0.145 (0.205)

n

15

15

14

15

15

13

12

4

2

% positive samples*

60

58

64

73

80

92

83

25

50

  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)