Table 4. DEHP concentrations in groundwater, raw MSW landfill leachate and precipitation in the region.
| Year | Season of sampling | DEHP concentration in groundwater (µg/L) | DEHP concentration in leachate (µg/L) | Mean DEHP concentration in leachate (WCS) (µg/L) | Average precipitation per season** (mm) | Total annual precipitation** (mm) | |
|---|---|---|---|---|---|---|---|
| upstream | downstream | ||||||
| 2014 | Summer | – | – | 18.5 | 200,4 | 81 | 622,4 |
| – | – | 22.3 | |||||
| – | – | 17.8 | |||||
| Autumn | – | – | 256.7 | 16 | |||
| – | – | 394.4 | |||||
| – | – | – | |||||
| Winter | – | – | 167.0 | 44 | |||
| – | – | 184.3 | |||||
| – | – | 22.5 | |||||
| 2015 | Summer | <LOQ | <LOQ | 64.9* | 61,5 | 33 | 407,6 |
| <LOQ | <LOQ | 65.4 | |||||
| <LOQ | <LOQ | 73.9* | |||||
| Autumn | <LOQ | – | 30.2 | 45 | |||
| <LOQ | – | 58.1* | |||||
| <LOQ | – | 9.1* | |||||
| Winter | <LOQ | <LOQ | 52.6* | 36 | |||
| <LOQ | <LOQ | 44.6 | |||||
| <LOQ | <LOQ | 34.4* | |||||
| 2016 | Spring | – | – | 43.1* | 23,3 | 30 | 667,6 |
| – | – | 36.0 | |||||
| – | – | 32.4* | |||||
| Summer | – | – | 7.5 | 75 | |||
| – | – | 12.0 | |||||
| – | – | 7.1 | |||||
| Autumn | 1.5 | – | <LOQ | 63 | |||
| <LOQ | – | <LOQ | |||||
| <LOQ | – | <LOQ | |||||
Notes.
- WCS
- a worst-case scenario
- –
- no data available
*
source: Wowkonowicz & Kijeńska, 2017.
**
based on the data from meteorological station provided by the Institute of Meteorology and Water Management - National Research Institute (IMGW-PIB).