Table 1 Gas composition measured by GC for CH4, CO2, O2 and by Lucideon Ltd for trace contaminants H2S, H2 and NH3
Sample | Source location | Date of sampling | CH4 (%) | CO2 (%) | O2 (%) | N2 (%) | H2S (ppm) | H2 (ppm) | NH3 (mg/m3) |
|---|---|---|---|---|---|---|---|---|---|
AD1 | Staffordshire | 17/12/17 | 49.0 | 40.3 | 2.1 | 7.7 | 94.0 | 0 | 2.9 |
AD2 | Staffordshire | 16/01/18 | 58.6 | 33.4 | 2.1 | 7.8 | 462.0 | 0 |  > 0.7 |
AD3 | Staffordshire | Â 26/02/19 | 62.4 | 40.5 | 0.5 | 0.0 | 682.0 | 23.0 | 0 |
AD4 | Staffordshire | Â 26/02/19 | 58.0 | 38.0 | 0.4 | 0.0 | 34.0 | 16.0 | 0 |
LG1 | East Midlands | 07/01/2019 | 52.2 | 37.3 | 0.4 | 10.1 | n/a | n/a | n/a |
LG2 | East Midlands | 08/01/2019 | 45.6 | 31.5 | 0.4 | 22.5 | n/a | n/a | n/a |
LG3 | East Midlands | 08/01/2019 | 51.9 | 38.7 | 0.4 | 9.0 | n/a | n/a | n/a |