| Date | Value |
|---|---|
| May 23, 2020 19:18 | 0.00 ppm |
| May 13, 2020 00:54 | 0.00 ppm |
| May 4, 2020 22:35 | 80 ppm |
| Apr 26, 2020 20:32 | 0.00 ppm |
| Apr 22, 2020 19:25 | 0.00 ppm |
| Apr 18, 2020 14:55 | 0.00 ppm |
| Apr 17, 2020 20:06 | 0.00 ppm |
| Apr 16, 2020 21:50 | 0.00 ppm |
| Apr 16, 2020 17:57 | 0.00 ppm |