| Date | Value |
|---|---|
| Jan 23, 2021 16:46 | 0.00 ppm |
| Jan 23, 2021 15:49 | 0.15 ppm |
| Sep 19, 2020 16:04 | 0.15 ppm |
| Aug 9, 2020 22:31 | 0.00 ppm |
| Jun 29, 2020 02:14 | 0.05 ppm |
| May 31, 2020 23:54 | 0.00 ppm |
| May 13, 2020 23:58 | 0.00 ppm |
| May 3, 2020 22:34 | 0.00 ppm |
| Apr 29, 2020 22:49 | 0.00 ppm |
| Apr 25, 2020 15:09 | 0.00 ppm |
| Apr 20, 2020 21:00 | 0.10 ppm |
| Apr 20, 2020 19:26 | 0.15 ppm |
| Apr 18, 2020 14:17 | 0.15 ppm |