| Date | Value |
|---|---|
| Nov 4, 2020 02:19 | 0.28 ppm |
| Oct 19, 2020 20:45 | 0.25 ppm |
| Oct 12, 2020 19:21 | 0.00 ppm |
| Sep 28, 2020 21:28 | 0.00 ppm |
| Sep 13, 2020 23:43 | 0.00 ppm |
| Sep 9, 2020 00:30 | 0.00 ppm |
| Aug 18, 2020 18:25 | 0.00 ppm |
| Aug 12, 2020 00:21 | 0.25 ppm |
| Jul 30, 2020 15:49 | 0.25 ppm |
| Jul 22, 2020 18:00 | 0.25 ppm |
| Jul 20, 2020 20:23 | 0.25 ppm |