Table 5 Concentration of DMS in leachate and groundwater [µg/L] and related attenuation factors
Attenuation Step | Catchment I | Attenuation factor | Catchment II | Attenuation factor | Catchment III | Attenuation factor | |
|---|---|---|---|---|---|---|---|
0 | FOCUS scenario Hamburg at 1 m depth | 9.4 | – | 18 | – | 34 | – |
1 | Leachate at 1 m depth | 12 | – | 14 | – | 27 | – |
2 | Leachate to aquifer | 12 | 1.0 | 15 | 0.9 | 1.7 | 16 |
3 | Aquifer next to treated area | 1.7 | 7.1 | 3.6 | 4.1 | 0.7 | 2.6 |
4 | Downstream, close to treated area | 0.7 | 2.4 | 1.8 | 2.0 | n.a. a) | n.a. a) |
5 | Close to raw water abstraction | 0.6 | 1.2 | 1.1 | 1.6 | 0.3 | 2.2 |
6 | Collected raw water | 0.3 | 2.0 | 0.3 | 3.7 | 0.1 | 2.6 |
Total attenuation (Step 1 to 5) “field-to-observation well” | 20 | 12 | 93 | ||||
Overall attenuation (Step 1 to 6) “field-to-drinking water well” | 40 | 45 | 246 | ||||