| Date | Value |
|---|---|
| Dec 10, 2022 01:59 | 0.00 ppm |
| Oct 26, 2021 23:03 | 0.00 ppm |
| Jul 15, 2021 08:38 | 0.00 ppm |
| Jan 21, 2021 07:55 | 5 ppm |
| Dec 18, 2020 05:08 | 15 ppm |
| Dec 12, 2020 07:09 | 10 ppm |
| Dec 6, 2020 01:18 | 1 ppm |
| Dec 4, 2020 06:49 | 0.00 ppm |
| Dec 3, 2020 10:13 | 2.5 ppm |
| Dec 1, 2020 08:34 | 3 ppm |