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 |