Table 1.
Physiochemical parameters of groundwater samples from the upper and lower aquifers; sampling campaign September 2013.
| Site | Aquifer top depth (m) | pH | DO (mg L-1) | DOC (μmol L-1) | TOC (μmol L-1) | SO42- concentration (mmol L-1) | EC (Tref 25°C) (μS cm-1) |
|---|---|---|---|---|---|---|---|
| Upper aquifer | |||||||
| H32 | 15 | 7.3 | 3.2 | 2.54 | 2.72 | 0.5 | 760 |
| H43 | 8.5 | 7.1 | 0 | 2.89 | 3.28 | 0.2 | ND |
| H52 | 65 | 7.2 | 0 | 1.72 | 1.77 | 0.5 | 780 |
| H53 | 47 | 7.3 | 0 | 1.42 | 1.81 | 0.4 | 725 |
| Lower aquifer | |||||||
| H31 | 43 | 7.2 | 8.4 | 2.89 | 3.32 | 0.54 | 740 |
| H41 | 44.5 | 7.2 | 4.6 | 2.07 | 2.50 | 0.57 | ND |
| H51 | 84 | 7.1 | 2.4 | 2.24 | 2.50 | 1.39 | 1049 |