| Date | Value |
|---|---|
| Dec 28, 2021 20:28 | 0.00 ppm |
| Nov 28, 2021 23:29 | 0.00 ppm |
| Jul 11, 2021 18:02 | 0.11 ppm |
| Feb 27, 2021 05:14 | 0.00 ppm |
| Nov 22, 2020 06:34 | 0.03 ppm |
| Sep 28, 2020 17:28 | 0.03 ppm |
| Aug 19, 2020 04:20 | 0.07 ppm |
| Jun 10, 2020 00:36 | 0.00 ppm |
| Mar 4, 2020 22:37 | 0.11 ppm |
| Feb 27, 2020 08:14 | 0.08 ppm |
| Feb 20, 2020 22:26 | 0.00 ppm |
| Feb 17, 2020 03:32 | 0.59 ppm |
| Sep 11, 2019 23:04 | 0.00 ppm |
| May 30, 2019 04:40 | 0.00 ppm |