Table 8.
Mean Risk Characterisation Ratio (RCR) with standard deviation for elements measured in soil and sediments in five stormwater ponds. Negligible concentrations (NC, in mg/kg DW sediment) was collected from Crommentuijn et al. (2000). Mean RCRs in bold text ≥ 1, ponds with a at least 1 sample with a RCR ≥ 1 in italics
| Pond | Ba (157)1 |
Cd (1.1) |
Co (9.1) |
Cu (36) |
Ni (35) |
Sb (3.2) |
V (42) |
Zn (145) |
Sum-RCR2 |
|---|---|---|---|---|---|---|---|---|---|
| A | 0.8 ± 0.2 | 0.4 ± 0.1 | 1.2 ± 0.2 | 1.3 ± 0.2 | 0.7 ± 0.1 | 1.4 ± 0.4 | 1.6 ± 0.3 | 2.7 ± 0.5 | 11.1 ± 2.1 |
| B | 1.0 ± 0.2 | 0.8 ± 0.2 | 1.1 ± 0.2 | 2.4 ± 0.7 | 0.7 ± 0.2 | 2.8 ± 0.8 | 1.3 ± 0.2 | 5.6 ± 1.9 | 17.3 ± 4.2 |
| C | 0.5 ± 0.0 | 0.1 ± 0.0 | 1.4 ± 0.0 | 0.6 ± 0.0 | 1.0 ± 0.0 | 0.1 ± 0.0 | 1.3 ± 0.1 | 0.6 ± 0.1 | 6.3 ± 0.1 |
| D | 0.6 ± 0.1 | 0.5 ± 0.2 | 1.0 ± 0.2 | 2.3 ± 1.1 | 0.5 ± 0.1 | 1.7 ± 0.8 | 1.0 ± 0.2 | 3.8 ± 1.6 | 12.3 ± 4.5 |
| E | 0.3 ± 0.1 | 0.1 ± 0.1 | 0.8 ± 0.5 | 0.6 ± 0.1 | 0.3 ± 0.1 | 0.3 ± 0.1 | 0.5 ± 0.2 | 0.9 ± 0.2 | 3.9 ± 0.4 |
| soil | 0.5 ± 0.1 | 0.1 ± 0.0 | 1.4 ± 0.3 | 0.5 ± 0.0 | 0.8 ± 0.2 | 0.0 ± 0.0 | 1.1 ± 0.1 | 0.5 ± 0.0 | 5.6 ± 0.8 |
1NC in parenthesis
2Sum mean RCR for all elements analysed except P and S