| Date | Value |
|---|---|
| Dec 8, 2020 22:56 | 0.00 ppm |
| Dec 4, 2020 13:10 | 0.00 ppm |
| Dec 3, 2020 11:59 | 0.25 ppm |
| Dec 2, 2020 18:15 | 0.00 ppm |
| Oct 4, 2020 09:41 | 0.00 ppm |
| Sep 12, 2020 02:05 | 0.00 ppm |
| Aug 26, 2020 02:05 | 0.00 ppm |
| Aug 6, 2020 02:05 | 0.00 ppm |
| Jul 30, 2020 02:05 | 1 ppm |
| Jul 25, 2020 02:05 | 6 ppm |
| Jul 20, 2020 02:05 | 8 ppm |
| Jul 17, 2020 01:05 | 8 ppm |